JP2008284190A - Absorbent articles - Google Patents

Abstract

An absorbent article having excellent excretion fluid absorbability and good fit for a wearer is provided.
An absorbent article according to the present invention includes an absorbent body, a top sheet that is arranged so as to cover the surface of the absorbent body, and at least a part of which is made of a liquid-permeable material, and an absorbent body. An absorbent article 1 provided with a back sheet 20 made of a liquid-impermeable material, disposed on the back surface, wherein the absorber 22 has a hole 15 penetrating from the surface of the absorber 22 to the back surface. The top sheet 18 is disposed on the front surface of the absorbent body 22, and the back surface of the absorbent body 22 is diffused with higher liquid permeability than the absorbent body 22 so as to cover the region including the opening of the hole 15. A sheet 23 is disposed.
[Selection] Figure 1

Description

  The present invention relates to an absorbent article. More specifically, the present invention relates to an absorbent article having excellent excretory fluid absorbability.

  Absorbent articles include disposable diapers that absorb excretory fluids such as urine (for example, tape-type diapers, pants-type diapers, urine pads, etc.), sanitary napkins that absorb menstrual blood, and sheets that absorb caged items. It is used in. For example, a disposable diaper having a top sheet, a back sheet, and an absorbent body interposed between a part of both sheets as an absorbent article for infants or adults such as the elderly and persons with disabilities It is used.

  Such an absorbent article, for example, a disposable diaper is used by placing the surface of the top sheet in contact with the skin of the wearer so that the urine excreted by the wearer permeates through the top sheet and is absorbed. The back sheet that is absorbed and held by the body and excellent in leakage prevention prevents leakage of excretory fluid to the outside.

  In the conventional absorbent article, the excreted liquid that has permeated from the top sheet has been absorbed from the surface side (the wearer's skin side) of the absorbent body in accordance with the absorption speed of the absorbent body. However, when the excretion rate exceeds the absorption rate of the absorber, or when a large amount of excretion fluid is excreted at once, the phenomenon of excretion fluid flowing on the top sheet has occurred. In such a case, the excretory fluid that has not been absorbed and has flowed on the top sheet contaminated the wide range of the wearer's skin, causing an unpleasant feel as well as causing a rash. Furthermore, the excretory fluid that has flowed on the top sheet may leak out of the absorbent article.

  On the other hand, a lot of excretory liquid that is sequentially absorbed from the top sheet side of the absorbent article, that is, the surface side of the absorbent body, tends to be unevenly distributed on the surface side of the absorbent body in the thickness direction of the absorbent body. For this reason, when the wearer applies body pressure, the excretory fluid easily returns from the top sheet side, which is not only uncomfortable but also causes rashes.

  For this reason, an absorbent article in which a diffusion layer is disposed between the top sheet and the absorbent body has been proposed. This is because the excretory fluid that cannot be absorbed by the absorber is dispersed in the diffusion layer, temporarily retaining the excretory fluid, and promoting dispersion absorption in a wider range, thereby increasing the absorption rate and This has the effect of preventing the flow of excreted liquid in the water and preventing liquid leakage.

  Moreover, the disposable diaper which formed the groove | channel along the longitudinal direction was formed in the surface and back surface of an absorber for the purpose of improving the diffusibility to the longitudinal direction of excretion liquid, being easy to bend along a crotch part, and improving fitting property. (For example, refer to Patent Documents 1 and 2).

Japanese Patent No. 3616077 JP 2005-34652 A

  However, in a conventional absorbent article in which a diffusion layer is arranged between the top sheet and the absorber, it is only sufficient to widen the absorption area on the surface of the absorber on the top sheet side, which is sufficient as a method for increasing the absorption rate. There was a problem that was not. Moreover, even if a diffusion layer is disposed between the top sheet and the absorber, the fact that the diffused excretion is absorbed from the surface of the absorber is the same as an absorbent article without a diffusion layer, The problem of being unevenly distributed on the top sheet side and the excretion fluid being easily returned has not been solved.

  Moreover, since the absorbent article (disposable diaper) of Patent Documents 1 and 2 has a groove formed in the absorbent body, the absorbent article is bent at this groove, and it is difficult to form a gap at the crotch part. Excellent fit. However, the configuration in which the excretory liquid is sequentially absorbed from the top sheet to the surface of the absorbent body is not different from a normal absorbent article, and there is a problem that the excretion liquid has a low absorption rate. In addition, in this patent document 1 and 2, the method of arrange | positioning the water-permeable sheet which consists of crepe paper so that both may be divided between the upper and lower absorbers is also disclosed, and this water-permeable sheet is transmitted. It is said that the excretory fluid diffuses in a plane, but the speed at which the excrement moves along the water-permeable sheet made of such crepe paper is extremely slow compared with the excretion rate of the excretory fluid. Even when the water-permeable sheet made of the material was disposed, the absorption rate of the absorbent article could not be increased.

  The present invention has been made to solve such problems of the prior art, and provides an absorbent article having excellent excretory fluid absorbability.

  As a result of intensive studies to solve the problems of the prior art as described above, the present inventor, in an absorbent article including an absorbent body, a top sheet, and a back sheet, as the absorbent body, from the surface of the absorbent body. A diffusion sheet having a liquid permeability higher than that of the absorber is used so as to cover the region including the opening of the hole described above on the back surface of the absorber. It was conceived that the above-mentioned problems can be solved by arranging them, and the present invention was completed. Specifically, the following absorbent articles are provided by the present invention.

[1] An absorber, a top sheet that is arranged so as to cover the surface of the absorber, and at least a part is made of a liquid-permeable material, and a back sheet of the absorber that is made of a liquid-impermeable material. An absorbent article comprising a back sheet, wherein the absorbent body is formed with a hole penetrating from the front surface to the back surface of the absorbent body, and the top sheet is disposed on the surface of the absorbent body In addition, on the back surface of the absorbent body, an absorbent article (hereinafter referred to as “the diffusion sheet” having a higher liquid permeability than the absorbent body is disposed so as to cover a region including the opening of the hole. Sometimes referred to as “first absorbent article”).

[2] The top sheet covers the surface of the absorber, covers the inner peripheral surface of the hole of the absorber, and the diffusion sheet exposed from the hole, The top sheet and the diffusion sheet are the absorbent articles according to [1], in which the top sheet and the diffusion sheet are joined at the opening of the hole on the back side of the absorber.

[3] An absorber, arranged to cover the surface of the absorber, and at least a part of the top sheet made of a liquid permeable material, and arranged on the back surface of the absorber, made of a liquid impermeable material. An absorbent article comprising a back sheet, wherein the absorbent body includes a first absorbent body and a second absorbent body, and the first absorbent body is a surface of the first absorbent body. Is formed on the surface of the first absorbent body, the top sheet is disposed between the first absorbent body and the second absorbent body. An absorbent article (hereinafter referred to as “first”) in which a diffusion sheet having higher liquid permeability than the first absorbent body is disposed so as to cover an area including the opening of the hole of the first absorbent body. Sometimes called "second absorbent article").

[4] The top sheet covers the surface of the first absorber, and covers the inner peripheral surface of the hole of the first absorber and the diffusion sheet exposed from the hole. The absorbent article according to [3], wherein the top sheet and the diffusion sheet are joined at an opening of the hole on the back side of the first absorbent body.

[5] The second absorber is formed with a hole penetrating from the front surface to the back surface of the second absorber, and the back sheet covers the back surface of the second absorber. And covering the inner peripheral surface of the hole of the second absorber and the back surface of the diffusion sheet exposed from the hole of the second absorber, and the backsheet and the The diffusion sheet is the absorbent article according to [3] or [4], which is joined at the opening of the hole on the surface side of the second absorbent body.

[6] An absorber, a top sheet that is arranged so as to cover the surface of the absorber, and at least a part of which is made of a liquid-permeable material, and a rear surface of the absorber that is made of a liquid-impermeable material. An absorbent article comprising a back sheet, wherein the absorbent body includes a first absorbent body and a second absorbent body, and the first absorbent body is a surface of the first absorbent body. A hole penetrating from the surface of the second absorber to the back surface is formed on the surface of the first absorber. The top sheet is disposed, and between the first absorbent body and the second absorbent body, the region including the opening of the hole of the first absorbent body is covered. A first diffusion sheet having a higher liquid permeability than the first absorbent body, and the second absorbent body; On the back surface, an absorptivity in which a second diffusion sheet having higher liquid permeability than the second absorber is disposed so as to cover a region including the opening of the hole of the second absorber. Article (hereinafter sometimes referred to as “third absorbent article”).

[7] The top sheet covers the surface of the first absorber, and the inner surface of the hole of the first absorber and the first diffusion exposed from the hole. The sheet according to [6], wherein the top sheet and the first diffusion sheet are joined at an opening of the hole on the back side of the first absorber. Absorbent article.

[8] The absorption according to any one of [5] to [7], wherein the hole portion of the first absorber and the hole portion of the second absorber are formed at different positions. Sex goods.

[9] The absorption according to any one of [5] to [7], wherein the hole portion of the first absorber and the hole portion of the second absorber are formed at the same position. Sex goods.

[10] The absorptivity according to any one of [1] to [9], wherein the hole formed in the absorber has an elongated shape in which an opening of the hole extends in a longitudinal direction of the absorber. Goods.

[11] The absorbent article according to any one of [1] to [10], wherein the hole formed in the absorbent body is formed in a wearer's excretion site.

  The absorbent article (first to third absorbent articles) of the present invention is excellent in excretory fluid absorbability. That is, the absorbent article of the present invention absorbs excretion liquid at the excretion site on the surface (surface) on the top sheet side of the absorber, and partially absorbs the excretion liquid (second and third absorptions). In the absorbent article, the diffusion sheet is passed through the hole of the first absorbent body and has higher liquid permeability than the absorbent body (first absorbent body) (in the third absorbent article, the first diffusion). The excretory fluid can be absorbed from the back surface of the absorber (first absorber) through the diffusion sheet (first diffusion sheet). As described above, since the excretory fluid can be absorbed in a wider area, the absorbent article of the present invention has a high absorption rate of the excretory fluid and is excellent in absorbability.

  Moreover, since the 2nd and 3rd absorbent article further has a 2nd absorber on the back surface of the diffusion sheet arrange | positioned at an above described 1st absorber, the absorptivity of an absorbent article is provided. Further improvement can be achieved.

  Furthermore, since the 3rd absorbent article has the 2nd diffusion sheet arrange | positioned at the back surface side of the 2nd absorber, it passes through this 2nd diffusion sheet, and from the back surface of the 2nd absorber. Even the excretory fluid is absorbed. For this reason, the absorption speed of excretion liquid becomes still higher, and it is more excellent in absorptivity.

  Hereinafter, the best mode for carrying out the absorbent article (first to third absorbent articles) of the present invention will be specifically described with reference to the drawings. However, the present invention broadly encompasses absorbent articles having the invention specific items, and is not limited to the following embodiments.

[1] Absorbent article:
The absorbent article of the present invention (first to third absorbent articles) is arranged to cover the absorbent body and the surface of the absorbent body, at least a part of the top sheet made of a liquid permeable material, It is an absorptive article provided with the back sheet which is arranged on the back of the absorber and which consists of a liquid impermeable material.

  Such absorbent articles absorb disposable diapers that absorb excrement such as urine (for example, tape-type diapers, pants-type diapers, urine pads, etc.), sanitary napkins that absorb menstrual blood, and cages. It can be used as a sheet of cage.

[1-1] First absorbent article:
The 1st absorbent article of this invention is arrange | positioned so that the surface of the absorber 22 and the absorber 22 may be coat | covered like the absorbent article 1 shown in FIGS. 1-3, and at least one part is liquid-permeable. The absorbent article 1 includes a top sheet 18 made of an absorbent material and a back sheet 20 arranged on the back surface of the absorbent body 22 and made of a liquid-impermeable material. The absorbent body 22 is a surface of the absorbent body 22. The top sheet 18 is disposed on the surface of the absorber 22 so as to cover the region including the opening of the hole 15 on the back surface of the absorber 22. In addition, a diffusion sheet 23 having higher liquid permeability than the absorber 22 is disposed. Here, FIG. 1 is a partially cutaway plan view showing one embodiment of the first absorbent article of the present invention, and shows a state in which the first absorbent article is viewed from the top sheet side. FIG. 2 is a schematic cross-sectional view showing a cross section of the first absorbent article shown in FIG. 1 cut along the line AA ′, and FIG. 3 is a first absorbent article shown in FIG. It is a schematic sectional drawing which shows the cross section which cut | disconnected along BB 'line.

  By comprising in this way, the 1st absorbent article of this invention absorbs the excretion liquid excreted from the wearer from the surface (surface of an absorber) on the top sheet side of an absorber, and its excretion A part of the liquid can be passed through the hole, can be quickly passed through the diffusion sheet having higher liquid permeability than the absorber, and can be diffused, and the excretory liquid can be absorbed also from the back side of the absorber. For this reason, the 1st absorptive article can actually be in contact with excretion liquid, can increase the area of the part which absorbs the excretion liquid, and can improve the absorption speed of an absorber greatly. For this reason, the 1st absorptive article of the present invention can absorb a lot of excretion fluid which was not able to be processed conventionally, and excretion fluid with a fast excretion rate, and can prevent leaking.

  In addition, since the first absorbent article of the present invention does not concentrate and absorb the excretory fluid in one place, even if the excreted fluid is excreted repeatedly, the excretion site (for example, when worn) The remaining capacity of the absorbent at the crotch portion (hereinafter referred to as “absorption capacity”) tends to remain. For this reason, for example, even when the wearer applies body pressure to the absorbent article, if the remaining absorption capacity remains, it is difficult for the excreted fluid absorbed to reverse (also referred to as liquid return). There is little sticking and it can be used well.

  Furthermore, since the excretory fluid can be directly absorbed from the back surface of the absorber as described above, the excreted fluid that has been absorbed is not unevenly distributed on the surface side of the absorber (that is, the skin side of the wearer) It is possible to effectively prevent the above-described excretory liquid from returning.

  Furthermore, in the first absorbent article, by forming the hole portion formed in the absorbent body so that the opening of the hole portion has an elongated shape extending in the longitudinal direction of the absorbent body, The absorbent body can be bent and easily adhered to the urination site of the wearer, and the fit to the wearer can be improved. In addition, when used as a disposable diaper composed of the front body, the crotch part, and the back body, it is possible to improve the fit around the legs and effectively prevent liquid leakage from the legs. Is also possible.

  In the absorbent article of the present invention, a sheet having a higher liquid permeability than the absorber disposed on the surface side of the diffusion sheet is used as the diffusion sheet. As a method for comparing the liquid permeability between the diffusion sheet and the absorber, the following methods can be used.

  First, an absorbent body (hereinafter sometimes referred to as “absorber A”) used for the absorbent article of the present invention and an absorbent body (hereinafter referred to as “absorption”) in which a diffusion sheet is disposed on the upper surface of the same absorbent body as the absorbent body A. Two types of absorbers are prepared. Each absorbent body (absorbers A and B) is interposed between the top sheet and the back sheet to absorb the same amount of physiological saline as the excretory fluid, and all the physiological saline is absorbed into the absorbent body. The time taken for absorption (absorption time) is measured.

  When the absorber B has a shorter absorption time, the liquid permeability of the diffusion sheet is higher than that of the absorber, and conversely, when the absorber A has a shorter absorption time, The liquid permeability is lower than that of the absorber.

[1-1a] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  The absorber is interposed between the top sheet and the back sheet, and is interposed between the top sheet and the back sheet by sealing the periphery of the top sheet and the back sheet. Accordingly, a flap portion where no absorber is interposed between the top sheet and the back sheet is formed at the peripheral edge of the absorber, or the absorber edge portion is formed by at least one of the top sheet and the back sheet. Is wrapped.

  And in the 1st absorptive article, the hole which penetrates this absorber from the surface to the back is formed, and a top sheet is arranged on the surface of this absorber, and the back of the absorber A diffusion sheet having a higher liquid permeability than the absorber is disposed so as to cover a region including the opening of the hole.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of the whole absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials commonly used for general absorbent articles such as disposable diapers, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter) , "SAP"), hydrophilic sheets, and the like. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable. Moreover, synthetic fibers, such as a heat-fusion fiber, may be included as a countermeasure against deformation of the absorber.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  The absorber has another diffusion sheet (hereinafter referred to as “surface-side diffusion sheet”) for diffusing liquid such as urine and body fluid on the surface side (for example, between the absorber and the top sheet). May be incidentally arranged. When this surface side diffusion sheet is attached, even if the excretion liquid is excreted at a rate higher than the absorption rate of the absorber, the excretion liquid can be temporarily stored and diffused between the surface side diffusion sheets. There is an effect of preventing leakage by flowing on the top sheet without absorption in time.

  As a material which comprises a surface side diffusion sheet, what was comprised similarly to the diffusion sheet arrange | positioned on the back surface of an absorber can be used.

  The hole formed in the absorbent body has such a shape that a part of the excretory liquid that has passed through the top sheet and reaches the absorbent body flows in, and the excreted liquid that has passed through the hole penetrates the diffusion sheet. Although there is no particular limitation as long as it is present, for example, the hole of the absorbent body preferably has an elongated shape in which the opening of the hole extends in the longitudinal direction of the absorbent body.

  By configuring in this way, for example, even if the excretion fluid flows intensively into the region corresponding to the urination site, the excretion fluid is dispersed in the longitudinal direction through the elongated holes, so the urination in the absorber It is possible to effectively prevent the excretory fluid from being intensively absorbed only in the region, and the excretory fluid can be absorbed using a wider range of the absorber.

  Moreover, as described above, by forming the hole in the longitudinal direction, the absorbent article can be easily bent in the longitudinal direction along the hole, and can be easily adhered to the excretion site. Fit property can also be improved. For this reason, the effect of preventing liquid leakage can be further improved. In addition, the flow of excretion fluid in the width direction of the absorbent body having the shortest distance from the excretion site to the outside of the absorbent article is stopped, and the excretion fluid is guided in the longitudinal direction to prevent liquid leakage from the crotch. Can do.

  In addition, by forming the hole in the longitudinal direction in this way, the excretory fluid is easily diffused when the excretory fluid is absorbed from the rear surface of the absorber via the diffusion sheet disposed on the back surface of the absorber. Therefore, the excretory fluid can be absorbed efficiently.

  When a plurality of elongated holes are formed in the absorber, the widths of the holes may be the same or different. Note that one hole may be formed in the longitudinal direction with the same width, or may be configured so that the width of the hole is different in the longitudinal direction.

  In addition, although it does not specifically limit, When the opening part of a hole is the elongate shape extended in the longitudinal direction of an absorber, it is preferable that the width is 5-35 mm, and is 10-25 mm. Is more preferable. If the width of the opening of the hole is too narrow, the fit may be lowered when the absorber is bent at the hole and pressed against the urination site. Moreover, when the width | variety of the opening part of a hole part is too narrow, excretion liquid may become difficult to pass a hole part. Furthermore, when the absorbent body is twisted or deformed, or when the absorbent body swells, the periphery of the hole portion may collapse and the hole portion may be blocked, and a sufficient effect may not be obtained. On the other hand, if the width of the opening is too wide, the absorbent capacity of the absorber at the urination site is reduced, and the absorber may be easily torn from the hole.

  In addition, in the 1st absorbent article 1 shown in FIG.1 and FIG.2, the elongate hole 15 in which an opening part extends in a longitudinal direction is provided in the one end part side of the longitudinal direction of the absorber 22 at an absorber. Although the example in which three are formed in the width direction of 22 is shown, the number of the holes 15 and the positions to be formed are not particularly limited. For example, as shown in FIG. 4 and FIG. Two elongated holes 15 extending in the width direction of the absorbent body 22 may be formed. For example, as shown in FIGS. 6 and 7, the elongated holes extend in the longitudinal direction. A plurality (three in FIG. 6 and FIG. 7) of hole portions 15 having a shape may be formed in a substantially central portion in the width direction of the absorbent body 22 along the longitudinal direction. Here, FIG. 4 is a partially cutaway plan view showing another embodiment of the first absorbent article of the present invention, and is a view showing a state in which the absorbent article is viewed from the top sheet side. 5 is a schematic cross-sectional view showing a cross section of the absorbent article shown in FIG. 4 cut along the line CC ′. Moreover, FIG. 6 is a partially cutaway plan view showing still another embodiment of the absorbent article of the present invention, and is a view showing a state in which the absorbent article is viewed from the top sheet side, and FIG. It is a schematic sectional drawing which shows the cross section which cut | disconnected the absorbent article shown in FIG. 6 along the DD 'line. 4-7, about the thing comprised similarly to each element of the absorbent article shown in FIGS. 1-3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  Further, when a plurality of holes are formed in the width direction of the absorber, it is not necessary to form the openings of the plurality of holes in parallel. For example, as shown in FIG. The opening of the hole 15 on the side edge side may be formed by shifting from the central axis in the longitudinal direction. Further, for example, the shape of the opening may be curved instead of linear. For example, FIG. 8B shows an example in which the shape of the opening of the hole 15 on the side edge side of the absorber 22 is formed in a curved shape (specifically, an arc shape). By configuring as described above, when the first absorbent article is used as a disposable diaper or the like, it is difficult to form a gap around the leg or the like, and it is possible to effectively prevent liquid leakage from around the leg or the like. Become.

  Moreover, in the 1st absorbent article of this invention, as shown to FIG. 9A and FIG. 9B, the hole 15 may be formed so that it may hang over at least one edge part of the longitudinal direction of the absorber 22. FIG. . 9A shows an example in which a hole is formed so as to hang over at least one end in the longitudinal direction of the absorber, and FIG. 9B shows from one end to the other end in the longitudinal direction of the absorber. An example in which a continuous hole is formed is shown. Here, FIG. 8A, FIG. 8B, FIG. 9A, and FIG. 9B are partially cutaway plan views showing still another embodiment of the absorbent article of the present invention, and the absorbent article is viewed from the top sheet side. It is a figure which shows a state. In addition, in FIG. 8A, FIG. 8B, FIG. 9A, and FIG. 9B, about the thing comprised similarly to each element of the absorbent article shown in FIGS. 1-3, the same code | symbol is attached | subjected and description is abbreviate | omitted. To do.

  Moreover, although illustration is abbreviate | omitted, you may form so that a discontinuous hole may be applied to the both ends of the longitudinal direction of an absorber.

  In addition, as a method of forming such a hole part, the method of incorporating in the forming drum which forms an absorber can be mentioned. Specifically, a convex portion is formed in a portion corresponding to the hole portion in the concave portion of the forming drum formed so as to be stacked in the shape of the absorbent body, and pulp or the like is stacked in the absorbent body. This is a method of forming a non-fiberized hole.

  There is also a method in which after forming an absorbent body without a hole, a portion corresponding to the hole is extracted by a method such as punching to form a hole.

  In the method incorporated in the forming drum described above, a step of removing the hole by punching or the like is not required, so that trim processing is not required and the hole can be easily formed. On the other hand, in the method of forming the hole by punching or the like, a hole having a small opening or a hole having a complicated shape can be formed relatively easily.

  In the drawings, an example in which a plurality of holes are formed, or an example in which the number of holes is one, the example is formed over the entire length in the longitudinal direction. The hole may be formed only in the region corresponding to the part.

[1-1b] Diffusion sheet:
The diffusion sheet used for the 1st absorptive article of the present invention is arranged on the back of an absorber so that the field including the opening of the hole formed in the absorber may be covered. And this diffusion sheet is higher in liquid permeability than the absorber, and when the excretory fluid flows into the pores of the absorber, the diffusion fluid penetrates the diffusion sheet faster than it is absorbed by the absorber. Can be diffused.

As such a diffusion sheet, a nonwoven fabric, a porous plastic film, etc. can be used. Examples of main fibers and resins constituting the diffusion sheet include polyolefins such as polypropylene and polyethylene, polyamides such as polyester and nylon, acrylic, vinylon, and composite fibers or composite resins thereof. In the case of a nonwoven fabric, a diffusion sheet can be obtained by forming these fibers by a method such as a thermal bond method, a chemical bond method such as a resin bond, a needle punch method, or a spunlace method. Particularly preferred are bulky card hot-air nonwoven fabrics formed with hot air among thermal bond methods and resin-bonded nonwoven fabrics formed with coarse eyes by chemical bond methods. Its basis weight is preferably 10 to 50 g / ^{m 2,} and still more preferably from 20 to 35 g / ^{m 2.} In the case of porous plastic film, its basis weight is preferably from 15 to 60 g / ^{m 2,} and still more preferably from 20~45g / ^{m 2.}

  The diffusion sheet used in the absorbent article of the present invention preferably has a wet strength of 3.0 N / 25 mm or more and 6.0 N / 25 mm or more in order to prevent tearing from the hole. Is more preferable. The wet strength is a value measured according to JIS P8135. For example, crepe paper or the like has a weak wetting strength of 2.0 N / 25 mm or less, and thus may be torn from the hole when wet.

  About the width | variety of a diffusion sheet, if it is a magnitude | size which can be arrange | positioned so that the area | region containing the opening part of the hole part formed in the absorber may be covered, there will be no restriction | limiting in particular. In the absorbent article 1 of FIGS. 1 to 3, the absorbent body 22 is an hourglass shape, and the absorbent body 22 has a rectangular shape having a width similar to that of the narrowest portion (that is, the narrowed portion of the hourglass shape). Although the example in which the diffusion sheet 23 is arranged is shown, for example, as shown in FIG. 10A, the diffusion sheet 23 may have a width substantially the same as that of the absorber 22, or as shown in FIG. 10B. In addition, the diffusion sheet 23 may be wider than the absorber 22. Here, FIG. 10A and FIG. 10B are sectional views showing still another embodiment of the absorbent article of the present invention. 10A and 10B, the same components as those of the absorbent article shown in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted.

  In the absorbent article of the present invention, the width of the diffusion sheet is preferably 80% or less of the width at the excretion site of the absorber. For example, when a diffusion sheet is disposed in the entire width direction of the absorbent body, the excretory liquid may diffuse beyond the side edge of the absorbent body to the site where the absorbent body does not exist by the diffusion sheet. Moreover, by comprising in this way, the usage-amount of a comparatively expensive diffusion sheet can be decreased, and an absorbent article can be made cheaper. The diffusion sheet preferably has a width of 50% or more of the width at the excretion site of the absorber, and more preferably has a width of 65% or more. For example, when the width of the diffusion sheet is less than 50% of the width at the excretion site of the absorber, the excretion liquid cannot be sufficiently diffused, and the excretion liquid absorption rate may be reduced.

  Moreover, although the diffusion sheet may be arrange | positioned over the whole longitudinal direction of an absorber, you may arrange | position to a part. The length in the longitudinal direction of the diffusion sheet is not particularly limited as long as it is a size that can be disposed so as to cover the region including the opening of the hole formed in the absorber, but the length of the diffusion sheet is not limited. The length is preferably 35% or more of the length of the absorber, and more preferably 50% or more. By comprising in this way, an excretion site | part can be covered, excretion liquid can be spread | diffused favorably in a longitudinal direction, and an absorption rate can be improved favorably.

  Of course, you may arrange | position a diffusion sheet so that the whole area of the longitudinal direction of an absorber may be covered. By configuring in this way, the diffusion sheet can be arranged so as to cover the region including the opening of the hole of the absorber without aligning the diffusion sheet at the time of manufacture. It becomes possible to manufacture simply.

  When a porous plastic film is used as the diffusion sheet, the pore shape of the porous plastic film is funnel-shaped, that is, the size of the opening of the hole from the front surface side to the back surface side of the porous plastic film. It is preferable that the shape gradually decreases. By comprising in this way, excretion liquid can pass favorably from the hole of the porous plastic film, and liquid return is reduced.

  Moreover, there is no restriction | limiting in particular about the thickness of a diffusion sheet, However, When a porous plastic film is used as a diffusion sheet, it is preferable that it is 200-1500 micrometers, and it is still more preferable that it is 350-1200 micrometers.

  Normally, porous plastic films, etc. with large pore diameters are excellent in excretory fluid diffusivity, but when placed directly under the top sheet, the liquid is applied to the top sheet, which is the upper part of the film that becomes the non-porous part. It tends to remain, and the dryness of the surface sometimes worsens. Since the 1st absorptive article of the present invention is the composition in which a hole is formed in an absorber and a diffusion sheet is arranged on the back side of the absorber so as to cover the hole, the diffusion sheet is against the absorber. Even though it is arranged with a sufficient area, it is arranged in a state separated from the top sheet or in contact with the top sheet with a limited area, so that the liquid remaining on the top sheet is small as described above. Thus, sufficient diffusibility can be exhibited.

  Moreover, the diffusion sheet arrange | positioned at an absorber back surface may be colored. By using the colored diffusion sheet, it becomes easy to confirm the hole portion of the absorbent body from the top sheet side, and when the wearer uses the absorbent article, the absorbent article can be easily bent along the hole portion.

  When the diffusion sheet 23 has substantially the same width as the absorber 22 as shown in FIG. 10A, for example, the opening of the hole portion of the absorber is not necessary even when the diffusion sheet is not aligned at the time of manufacture. Since a diffusion sheet can be arrange | positioned so that the area | region containing a part may be covered, it becomes possible to manufacture an absorbent article simply.

  On the other hand, as shown in FIG. 10B, when the diffusion sheet 23 is wider than the absorber 22, for example, when the excretory fluid flows out from the side edge of the absorber, the diffusion sheet receives this. It becomes possible to diffuse the back surface of the absorber, and liquid leakage can be effectively prevented.

[1-2] Second absorbent article:
Next, one embodiment of the second absorbent article of the present invention will be specifically described. As shown in FIGS. 11 and 12, the second absorbent article of the present invention is disposed so as to cover the surface of the absorbent body 62 and the absorbent body 62, and at least a top made of a liquid-permeable material. The absorbent article 61 includes a sheet 18 and a back sheet 20 disposed on the back surface of the absorbent body 62 and made of a liquid-impermeable material. The absorbent body 62 includes a first absorbent body 62a and a second absorbent body 62a. The first absorber 62a has a hole 65 penetrating from the surface of the first absorber 62a to the back surface, and a top sheet is formed on the surface of the first absorber 62a. 18 is arranged, and the first absorber 62a and the second absorber 62b are arranged between the first absorber 62a and the second absorber 62b so as to cover the region including the opening of the hole 65 of the first absorber 62a. A diffusion sheet 63 having higher liquid permeability than the absorber 62a is disposed. It is a Osamusei article 61.

  That is, the second absorbent article of the present invention is provided with another absorbent body (second absorbent body in the second absorbent article) on the back side of the diffusion sheet of the first absorbent article described so far. ). By comprising in this way, the effect similar to the above-mentioned 1st absorbent article can be acquired. In addition, the second absorbent article of the present invention can increase the absorption capacity of the entire absorbent body, and the excretory fluid that has reached the diffusion sheet from the hole of the first absorbent body can be removed from the first absorbent body. Can be absorbed by the back surface of the second absorber and the surface of the second absorber. For this reason, it is possible to further increase the absorption rate of the excretory fluid and to effectively prevent the leakage of the excreted fluid.

  Here, FIG. 11 is a partially cutaway plan view showing one embodiment of the second absorbent article of the present invention, and shows a state in which the second absorbent article is viewed from the top sheet side. FIG. FIG. 12 is a schematic cross-sectional view showing a cross section of the second absorbent article shown in FIG. 11 taken along line E-E ′.

[1-2a] First absorber:
The 1st absorber used for the 2nd absorptive article of the present invention is a thing in which the hole which penetrates from the surface of the 1st absorber to the back is formed. A top sheet is disposed on the surface of the first absorber, and the first absorption is provided between the first absorber and the second absorber, that is, on the back surface side of the first absorber. A diffusion sheet having a liquid permeability higher than that of the first absorbent body is disposed so as to cover the region including the opening of the hole of the body.

  As the first absorbent body, one constructed in the same manner as the absorbent body in the first absorbent article described so far can be suitably used. In addition, about the structure of the hole part formed in a 1st absorber, it is preferable that it is comprised similarly to the hole part in a 1st absorbent article.

[1-2b] Second absorber:
As shown in FIG.11 and FIG.12, the 2nd absorber 62b used for the 2nd absorbent article 61 of this invention was arrange | positioned at the back surface of the diffusion sheet 63 arrange | positioned at the 1st absorber 62a. Absorber.

  The first absorbent body and the second absorbent body used in the second absorbent article of the present invention may have the same or different absorbent materials. . That is, for one of the first absorbent body and the second absorbent body, synthetic fibers such as heat-sealing fibers may be mixed in order to prevent the loss of shape. Moreover, the mixing ratio of the superabsorbent polymer is increased as compared with the first absorbent body so that the second absorbent body having a distance in the thickness direction from the top sheet side becomes an absorbent body for storing excretory fluid. The method is effective. By comprising in this way, the uneven distribution of the excretory fluid in a 1st absorber can be reduced, and when a body pressure is applied, it can be made hard to produce a return. For example, when the composition opposite to that described above, that is, when the blending ratio of the superabsorbent polymer in the first absorbent body close to the top sheet side is increased, polymer leakage may occur from the top sheet.

  The absorbent article 61 shown in FIGS. 11 and 12 includes a first absorbent body 62a, a second absorbent body 62b, and a diffusion sheet 63 sandwiched between the first absorbent body 62a and the second absorbent body 62b. For example, as shown in FIG. 13, the first absorbent body 62a and the second absorbent body 62b are joined at the side edge or a part of the edge at the outer edge. Also good. By comprising in this way, excretion can be favorably absorbed by the 1st absorber 62a and the 2nd absorber 62b.

  Although not shown, the absorber is a sheet-like hydrophilic sheet as a carrier to prevent leakage of the superabsorbent polymer or to prevent deformation of the absorber on the production line. A structure that wraps the back and side surfaces of the absorbent body is generally employed, and the absorbent article of the present invention also wraps the first absorbent body and the second absorbent body with such a hydrophilic sheet or the like. Also good. In addition, the absorber may be entirely wrapped with the hydrophilic sheet, or a part of the absorber may be wrapped with the hydrophilic sheet.

  12 and 13 show an example in which the first absorbent body 62a and the second absorbent body 62b are of the same size, for example, as shown in FIGS. 14A and 14B. As described above, the first absorbent body 62a and the second absorbent body 62b may have different sizes. In FIG. 14A, the second absorber 62b is smaller than the first absorber 62a, and the second absorption has the same size as the diffusion sheet 63 disposed on the back surface of the first absorber 62a. FIG. 14B shows an example in which the body 62b is provided, and FIG. 14B shows that the second absorbent body 62b is smaller than the first absorbent body 62a and larger than the diffusion sheet 63 disposed on the back surface of the first absorbent body 62a. The example in the case of having the 2nd absorber 62b is shown. Of course, the second absorber may be larger than the first absorber.

  In the absorbent article shown in FIGS. 14A and 14B, the top sheet 18 covers the surface of the first absorbent body 62a, and the inner surface of the hole 65 of the first absorbent body 62a and the hole section. An example is shown in which the diffusion sheet 63 exposed from 65 is covered, and the top sheet 18 and the diffusion sheet 63 are joined at the opening of the hole 65 on the back surface side of the first absorbent body 62a. ing. The top sheet and the diffusion sheet may be directly bonded, or may be bonded via a hydrophilic sheet that wraps the absorber.

  Furthermore, for example, as shown in FIG. 15, the second absorbent body has a diffusion sheet 63 disposed on the back surface side of the first absorbent body 62 a (that is, the front surface side of the second absorbent body 62 b). Except for the region corresponding to the opening of the hole 65 of the first absorbent body 62a, it may be wrapped with the hydrophilic sheet 51. By configuring in this way, SAP is prevented from leaking from the second absorbent body without inhibiting the permeation of excretion liquid from the hole to the diffusion sheet, and shape stability is provided to the second absorbent body. There is an advantage that it can be granted.

  In the absorbent article 61 shown in FIG. 15, the diffusion sheet 63 is disposed immediately below the top sheet in the hole, but the hydrophilic sheet 51 may be disposed on the front surface or the back surface of the diffusion sheet 63. In FIG. 15, the diffusion sheet 63 is wrapped with the hydrophilic sheet 51 together with the second absorbent body 62b, but may be disposed on the surface of the second absorbent body wrapped with the hydrophilic sheet. .

  In the absorbent article of the present invention, the second absorbent body is also formed with a hole that penetrates from the front surface to the back surface of the second absorbent body (hereinafter sometimes referred to as “second hole”). It may be. By comprising in this way, it becomes possible to bend a 2nd absorber in a 2nd hole, and to improve a fitting property further.

  In addition, as shown to FIG. 16A, when forming the 2nd hole 66 in the 2nd absorber 62b, the 2nd hole 66 is formed in the same position as the hole 65 of the 1st absorber 62a. Alternatively, as shown in FIG. 16B, the hole 65 of the first absorber 62a and the second hole 66 of the second absorber 62b may be formed at different positions.

  The shape of the opening of the second hole described above is not particularly limited, but is the same as that of the hole of the first absorber (hereinafter sometimes referred to as “first hole”). In the case where the opening of the hole has an elongated shape extending in the longitudinal direction of the absorbent body, the width is preferably 5 to 35 mm, more preferably 10 to 25 mm. The length and the second hole in the width direction of the absorber (hereinafter referred to as the width of the hole) may be the same or different. In the body, the flow rate is fast, and the width of the first hole is made wide so that a relatively large amount of excretory fluid can pass through. In the second absorbent body, it is diffused by the diffusion sheet. Since the waste fluid with a slow flow rate passes, the width of the second hole is made narrower than the width of the first hole. It may form.

  In addition, when the 1st hole 65 of the 1st absorber 62a and the 2nd hole 66 of the 2nd absorber 62b are formed in the same position like FIG. Since it reaches comparatively easily to the back surface side of the 2nd absorber 62b, the effect which absorbs excretion fluid also from the back surface of the 2nd absorber becomes high. Moreover, you may comprise so that one part may be the same and the other may differ in the position which each hole part (a 1st hole part and a 2nd hole part) forms. When the positions where each hole is formed are partly the same, it is easy to bend at the hole, and the absorbent article is appropriately bent according to the wearer's body shape and adhered to the excretion site. It becomes easy to let.

  On the other hand, when the first hole 65 of the first absorber 62a and the second hole 66 of the second absorber 62b are shifted and formed at different positions as shown in FIG. 16B, Since the retention time of the excretion liquid of the diffusion sheet 63 arranged on the back surface of the absorbent body 62a becomes longer, the amount of absorption from the back surface of the first absorbent body 62a and the surface of the second absorbent body 62b may be increased. it can.

  In addition, it is preferable that the position of a 1st hole part and a 2nd hole part is comprised so that at least one part may differ. For example, when the positions of all the holes in the first absorber and the second absorber are the same, the absorber is not disposed at all in the region corresponding to the holes, and the top sheet, the diffusion sheet, and the back In some cases, the sheets may be sequentially stacked, and the hole portion may be easily closed due to a twist or the like. By making the positions of the first hole part and the second hole part at least different, even when the absorbent article is folded, the bending position can be given a proper stiffness, and the shape of the absorbent article is It is easy to stabilize and can improve fit.

  In addition, the first hole and the second hole are formed so as to be in the same position in the vicinity of the center in the width direction to be the excretion site, and only one of the holes is formed at the side edge. It may be formed. By comprising in this way, it becomes easy to bend | fold the center of the width direction used as an excretion site | part, and it becomes easy to make an absorber contact | adhere to a wearer. Further, the side edge portion is appropriately bent by the hole formed in the side edge portion, and the fitting property can be further improved.

  Although illustration is abbreviate | omitted in the 2nd absorbent article of this invention, it is good also considering an absorber as a 3 or more laminated structure. In addition, when it is set as such a laminated structure, it is in the uppermost layer of an absorber so that the 1st absorber in which the hole part (1st hole part) was formed is located in a wearer's skin side. Deploy.

  For example, in the second absorbent article 61 shown in FIG. 12, an example in which the diffusion sheet 63 arranged in the first absorbent body 62 a is smaller than the width of the absorbent body 62 is shown. For example, as shown in FIG. 17, as the diffusion sheet 63, a sheet having the same size as the width of the first absorber 62a and the second absorber 62b may be used.

  Further, for example, as shown in FIG. 18, a diffusion sheet 63 disposed on the back surface of the first absorber 62a may be disposed so as to cover the entire second absorber 62b. By configuring in this way, the excreted liquid that has permeated the diffusion sheet 63 is not only absorbed from the back surface of the first absorbent body 62a and the surface of the second absorbent body 62b, but also the second absorbent body 62b. It is also absorbed from the side and back surfaces of this, and is effective when the amount of excretory fluid is large. In addition, the excretory liquid once absorbed on the back surface of the first absorbent body 62a and the surface of the second absorbent body 62b is gradually diffused through the diffusion sheet 63 into a relatively small amount of absorption. Therefore, the absorbing power of the absorber in the region close to the hole 65 is not easily saturated, and can be used satisfactorily without leaking for a long time.

  In addition, in FIG. 18, although the example in case the diffusion sheet is arrange | positioned so that the whole 2nd absorber may be covered is shown, for example, illustration is abbreviate | omitted, a diffusion sheet is at least 2nd absorption. The diffusion sheet may be disposed so as to cover the body surface and the side edge portion and to form a gap in the center portion of the back surface of the second absorbent body, or after covering the entire second absorbent body These side edges may be arranged so as to overlap each other.

[1-2c] Diffusion sheet:
What was comprised similarly to the diffusion sheet used for the above-mentioned 1st absorbent article of this invention can be used suitably for the diffusion sheet used for the 2nd absorbent article of this invention.

[1-3] Third absorbent article:
Next, one embodiment of the third absorbent article of the present invention will be specifically described. As shown in FIGS. 19 and 20, the third absorbent article of the present invention is arranged so as to cover the surface of the absorber 72 and the absorber 72, and at least a top made of a liquid-permeable material. The absorbent article 71 includes a sheet 18 and a back sheet 20 that is disposed on the back surface of the absorber 72 and is made of a liquid-impermeable material. The absorber 72 includes a first absorber 72a and a second absorber 72a. The first absorber 72a has a hole 75 (hereinafter, also referred to as “first hole”) penetrating from the front surface to the back surface of the first absorber 72a. The second absorber 72b has a hole 76 (hereinafter, also referred to as “second hole”) penetrating from the front surface to the back surface of the second absorber 72b. The top sheet 18 is disposed on the surface of the body 72a, and the first absorbent body 7 Between the first absorber 72a and the second absorber 72b, the liquid absorber is more permeable than the first absorber 72a so as to cover the region including the opening of the first hole 75 of the first absorber 72a. The high first diffusion sheet 73 is disposed, and the back surface of the second absorber 72b is covered with the second absorber 72b so as to cover the region including the opening of the second hole 76. This is an absorbent article 71 in which a second diffusion sheet 74 having higher liquid permeability than the absorbent body 72b is disposed.

  That is, the third absorbent article of the present invention is another absorbent in which a second hole portion penetrating from the front surface to the back surface is formed on the back surface side of the diffusion sheet of the first absorbent article described so far. Body (second absorbent body in the third absorbent article), and moreover than the second absorbent body so as to cover the region including the opening of the second hole of the second absorbent body A second diffusion sheet having high liquid permeability is arranged. By comprising in this way, the effect similar to the above-mentioned 1st absorbent article and 2nd absorbent article can be acquired. In addition, the third absorbent article of the present invention can increase the absorption capacity of the entire absorbent body, and the excretory fluid that reaches the first diffusion sheet from the hole of the first absorbent body The second absorber absorbs excreted liquid that has been absorbed by the back surface of the absorber and the surface of the second absorber, and has reached the second diffusion sheet from the second hole of the second absorber. Therefore, it is possible to further increase the absorption rate of the excretory fluid and to effectively prevent the leakage of the excretory fluid.

  Here, FIG. 19 is a partially cutaway plan view showing an embodiment of the third absorbent article of the present invention, and shows a state in which the third absorbent article is viewed from the top sheet side. FIG. FIG. 20 is a schematic cross-sectional view showing a cross section of the third absorbent article shown in FIG. 19 cut along the line F-F ′.

[1-3a] First absorber:
The 1st absorber used for the 3rd absorptive article of the present invention is a thing by which the hole which penetrates from the surface of the 1st absorber to the back is formed. A top sheet is disposed on the surface of the first absorber, and between the first absorber and the second absorber, that is, on the back side of the first absorber, A first diffusion sheet having higher liquid permeability than the first absorber is disposed so as to cover a region including the opening of the hole of the absorber.

  As the first absorbent body, one configured in the same manner as the first absorbent body in the second absorbent article described so far can be suitably used. In addition, about the structure of the hole part formed in a 1st absorber, it is preferable that it is comprised similarly to the hole part in a 2nd absorbent article.

[1-3b] Second absorber:
The 2nd absorber used for the 3rd absorbent article of this invention is arrange | positioned at the back surface of the 1st diffusion sheet 73 arrange | positioned at the 1st absorber 72a, as shown in FIG.19 and FIG.20. Absorber. In addition, if the 2nd hole part penetrated from the surface of a 2nd absorber to the back surface is formed, the 2nd absorber used for a 3rd absorbent article will be 2nd absorption mentioned above. What was comprised similarly to the 2nd absorber used for a property article can be used suitably.

  The first absorbent body and the second absorbent body used in the third absorbent article of the present invention have the same absorbent material as in the second absorbent article described above. It may be different or different.

  In FIGS. 19 and 20, an example in which the first absorber 72a and the second absorber 72b have the same size is shown, but the first absorber and the second absorption are shown. The body may have a different size.

  19 and 20 show an example in which the first hole 75 of the first absorber 72a and the second hole 76 of the second absorber 72b are formed at the same position. However, as shown in FIG. 21, for example, the first hole 75 of the first absorber 72a and the second hole 76 of the second absorber 72b are formed at different positions. May be. Here, FIG. 21 is a schematic sectional view showing another embodiment of the third absorbent article of the present invention. In addition, in FIG. 21, about the thing comprised similarly to each element of the absorbent article shown in FIG.19 and FIG.20, the same code | symbol is attached | subjected and description is abbreviate | omitted.

[1-3c] First diffusion sheet:
The 1st diffusion sheet used for the 3rd absorptive article of the present invention can use suitably what was constituted like the diffusion sheet used for the 1st absorptive article of the above-mentioned present invention.

[1-3d] Second diffusion sheet:
The 2nd diffusion sheet used for the 3rd absorptive article of the present invention covers the field containing the opening of the 2nd hole of the 2nd absorber on the back side of the 2nd absorber. It is the diffusion sheet to arrange. As the second diffusion sheet, one configured in the same manner as the diffusion sheet used in the first absorbent article of the present invention described above can be suitably used.

  In the third absorbent article, the first diffusion sheet and the second diffusion sheet may be diffusion sheets made of the same material, or may be diffusion sheets made of different materials. .

  For example, in the first diffusion sheet arranged near the top sheet, since the excretory liquid may concentrate and flow locally, the material has a higher liquid permeability, that is, a high diffusion capacity. It is preferable to use a diffusion sheet. Moreover, for example, a bulky nonwoven fabric can be used as one of the first diffusion sheet and the second diffusion sheet, and a resin-bonded nonwoven fabric can be used as the other diffusion sheet. In this way, sheets having different manufacturing methods can be used properly according to the characteristics.

  Moreover, the diffusion sheet from which a raw material differs, for example, a nonwoven fabric can be used as one diffusion sheet, and a porous plastic film can also be used as the other diffusion sheet. For example, when body pressure is not applied to the absorbent article, a bulky nonwoven fabric may be used as the diffusion sheet, and the excretory fluid may be diffused at a high speed. The material of the diffusion sheet may be appropriately selected according to the usage of the absorbent article, such as preventing the film from inhibiting diffusion.

  In addition, as for the size of the second diffusion sheet, if it can be arranged so as to cover the region including the opening of the second hole of the second absorber, the first absorption sheet The thing of the same magnitude | size as the 1st diffusion sheet arrange | positioned on the back surface of a body may be sufficient, and the thing of a different magnitude | size may be sufficient. When the first diffusion sheet and the second diffusion sheet are different in size, the first diffusion sheet closer to the top sheet is made larger so that the initial amount of excretory fluid can be increased. The diffusion rate of the excretory fluid can be further improved.

  Moreover, in the absorbent article of this invention, it shall have three or more absorbers, and even if another absorber (for example, 3rd absorber) is arrange | positioned on the back surface side of a 2nd diffusion sheet. In addition, a hole is formed in the other absorber (third absorber), and another diffusion sheet (for example, third diffusion) is formed on the back side of the other absorber (third absorber). Sheet) may be arranged.

[1-4] Common configuration of absorbent article (first to third absorbent articles) of the present invention:
Hereinafter, the configuration of each element common to the absorbent article (first to third absorbent articles) of the present invention will be described.

[1-4a] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the surface (surface located in a wearer's skin side at the time of wearing of a diaper when an absorbent article is used as a disposable diaper) may be covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the back surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment. The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials.

  Moreover, in the absorbent article (1st-3rd absorbent article) of this invention, it shows in the structure by which the top sheet was arrange | positioned along the surface of an absorber (1st absorber), for example, FIG. The top sheet may be arranged so as to cover the opening on the surface side of the hole 15 formed in the absorbent body 22, for example, in the first absorbent article, the top sheet Covers the surface of the absorber, and covers the inner surface of the hole of the absorber and the diffusion sheet exposed from the hole. The top sheet and the diffusion sheet are on the back side of the absorber. It may be joined at the opening of the hole. Further, also in the second absorbent article and the third absorbent article, the top sheet covers the surface of the first absorbent body, and from the inner surface of the hole part of the first absorbent body and the hole part. The exposed diffusion sheet (first diffusion sheet in the third absorbent article) is covered, and the top sheet and the diffusion sheet (first diffusion sheet) are the back surfaces of the first absorber. It may be joined at the opening of the side hole.

  For example, FIG. 22 shows that in the first absorbent article 1, the top sheet 18 covers the surface of the absorber 22 and is exposed from the inner surface of the hole 15 of the absorber 22 and from the hole 15. The diffusion sheet 23 is covered, and the top sheet 18 and the diffusion sheet 23 are joined at the opening of the hole 15 on the back surface side of the absorber 22, and FIG. 23 shows the second absorption. In the adhesive article 61, the top sheet 18 covers the surface of the first absorbent body 62a, and the diffusion sheet 63 exposed from the inner surface of the hole 65 and the hole 65 of the first absorbent body 62a. In this example, the top sheet 18 and the diffusion sheet 63 are joined at the opening of the hole 65 on the back surface side of the first absorbent body 62a.

  By comprising in this way, an absorber becomes easy to bend along a hole, and the fit nature to a wearer can further be improved. In addition, since the excretory fluid that has passed through the top sheet disposed in the hole penetrates directly into the diffusion sheet (first diffusion sheet in the third absorbent article), more diffusion fluid is diffused by the diffusion sheet. This makes it possible to further improve the absorption rate of the excretory fluid. Furthermore, the shape of the hole can be effectively prevented.

  Here, FIG. 22 is a sectional view showing still another embodiment of the first absorbent article of the present invention, and FIG. 23 shows still another embodiment of the second absorbent article of the present invention. It is sectional drawing. In FIGS. 22 and 23, components that are configured in the same manner as the elements of the absorbent article illustrated in FIGS. 2 and 12 are denoted by the same reference numerals, and description thereof is omitted.

  Further, for example, as shown in FIG. 15, the absorptivity in which the second absorbent body 62b is encapsulated by the hydrophilic sheet 51 except for the region corresponding to the opening of the hole 65 of the first absorbent body 62a. Also in the article 61, as shown in FIG. 24, the top sheet 18 covers the inner surface of the hole 65 of the first absorbent body 62a and the diffusion sheet 63 exposed from the hole 65, and the top sheet 18 And the diffusion sheet 63 may be joined at the opening of the hole 65 on the back surface side of the first absorber 62a. By comprising in this way, the effect similar to the absorbent article shown in FIG.22 and FIG.23 can be acquired. In the drawings, the diffusion sheet is wrapped in a hydrophilic sheet, but the diffusion sheet may be disposed on the upper surface of the hydrophilic sheet.

[1-4b] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the surface located in a wearer's clothing side may be covered when the back surface of an absorber, for example, an absorbent article is used as a disposable diaper. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the excretion liquid such as urine from leaking to the outside.

  Examples of the liquid-impermeable material constituting the back sheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impermeable but moisture permeable. Therefore, when used as a disposable diaper, the inside of the diaper There is an advantage that stuffiness can be prevented.

  Further, in the second absorbent article of the present invention, for example, as shown in FIG. 25, the back sheet 20 covers the back surface of the second absorbent body 62b and the second absorbent body 62b. The diffusion sheet 63 exposed from the inner surface of the hole 66 and the second hole 66 on the surface side of the second absorbent body 62b, and the back sheet 20 and the diffusion sheet 63, You may join in the opening part of the 2nd hole 66 of the surface side of the 2nd absorber 62b. By comprising in this way, an absorber becomes easy to bend along a 2nd hole, and the fit property with respect to a wearer can further be improved. Moreover, the shape loss of the second hole can be effectively prevented.

  In addition, when using the absorbent article of this invention as a disposable diaper, you may bond a sheet | seat material (cover sheet | seat) to this back sheet on the outer surface side. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[2] Disposable diapers:
Next, an embodiment in which the absorbent article of the present invention is used as a disposable diaper will be described. The absorbent article of the present invention can be applied to disposable diapers such as tape-type diapers, pants-type diapers, and urine pads. Hereinafter, a one-piece type tape diaper will be described as an example.

  In the present specification, the “tape diaper” means the absorbent body 22, the top sheet 18 made of at least a part of a liquid permeable material, and a liquid impervious like the tape diaper 100 shown in FIG. 26. A back sheet 20 made of material, and composed of a front body 2, a crotch 4 and a back body 6, and arranged so as to extend from the left and right side edges 6 a and 6 b of the back body 6. The disposable diaper further includes a fastening tape 7 for fixing the back body 6 to the front body 2.

  Further, in the present specification, the “pants-type diaper” refers to the side edges corresponding to the front body 2 and the back body 6 (side edges 2a, 6a, side edges) as in the pants-type diaper 110 shown in FIG. By joining the parts 2b and 6b), the joined part 8, one waist opening 10 and a pair of leg openings 12a and 12b are formed, which means a diaper configured in a pants shape in advance. .

  The “one-piece type” is different from the two-piece type described later in that it includes a top sheet, a back sheet, and an absorbent body. However, the absorbent body that absorbs and retains the gap between the top sheet and the back sheet. It means a type of diaper that is integrated (built-in) and configured integrally with a top sheet and / or a back sheet that has a mounting function.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

[2-1] Configuration of tape-type diaper:
The tape-type diaper which is an embodiment of the absorbent article of the present invention includes an absorbent body configured in the same manner as the absorbent body in the first to third absorbent articles described so far.

  That is, as in the first absorbent article, the absorbent body is formed with a hole penetrating from the front surface to the back surface, and a top sheet is disposed on the surface of the absorbent body. On the back surface, a diffusion sheet having higher liquid permeability than the absorbent body is disposed so as to cover the region including the opening of the hole, or the absorbent body, like the second absorbent article, The surface of the first absorber has a first absorber formed with a hole penetrating from the surface to the back surface, and a second absorber disposed on the back surface side of the first absorber. A top sheet is disposed in the first absorbent body so as to cover a region including the opening of the hole of the first absorbent body between the first absorbent body and the second absorbent body. A diffusion sheet having a higher liquid permeability than the body is arranged, or like the third absorbent article, the absorbent body A first absorber in which a hole penetrating from the surface to the back surface is formed, and a second absorber formed in a hole penetrating from the surface to the back surface and disposed on the back surface side of the first absorber; And a top sheet is disposed on the surface of the first absorbent body, and an opening of a hole of the first absorbent body is provided between the first absorbent body and the second absorbent body. A first diffusion sheet having higher liquid permeability than the first absorber is disposed so as to cover the area to be included, and an opening of a hole of the second absorber is provided on the back surface of the second absorber. A second diffusion sheet having higher liquid permeability than the second absorbent body is disposed so as to cover the region including the portion.

  For example, the tape-type diaper shown in FIG. 26 has the same configuration as that of the first absorbent article, that is, the absorbent body 22 is formed with a hole 15 penetrating from the front surface to the back surface. A top sheet 18 is disposed on the surface of the absorbent body 22, and a diffusion sheet 23 having higher liquid permeability than the absorbent body 22 is disposed on the back surface of the absorbent body 22 so as to cover the region including the opening of the hole 15. Yes.

  The tape type diaper of this embodiment is excellent in the absorbability of excretory fluid, and has a good fit for the wearer. That is, excretory fluid such as urine is absorbed at the urination site of the absorber (or the first absorber in the second and third absorbent articles), and part of the excreted fluid is absorbed by the absorber. Passes through the hole, penetrates into the diffusion sheet having a higher liquid permeability than the absorber (the first diffusion sheet in the case of the third absorbent article), and passes through this diffusion sheet to the back surface of the absorber. The excretory fluid is absorbed from. Thus, since excretory fluid is absorbed in a wider area, it is excellent in absorbency.

  Furthermore, the tape-type diaper of this embodiment forms the hole part of an absorber in the elongate shape along the longitudinal direction of an absorber, By this hole part, an absorber bends and it adheres to a wearer's urination site | part. It becomes easy and the fit with respect to a wearer can be improved. Further, since the absorber is bent by the hole, it is difficult to form a gap around the leg and the like, and liquid leakage from the leg and the like (so-called “lateral leakage”) can be effectively prevented.

  In addition, the absorber, the top sheet, and the back sheet constituting the tape-type diaper of the present embodiment were configured in the same manner as the respective constituent elements in the first to third absorbent articles of the present invention described so far. A thing can be used suitably.

  In the tape-type diaper of the present embodiment, the top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, the form which comprises the top sheet arrange | positioned at the upper surface part of an absorber and the top sheet arrange | positioned at the part of the side flap of a diaper by a different sheet | seat is also utilized frequently. The tape-type diaper 100 shown in FIG. 26 has a top sheet 18 (center sheet 18a) made of a liquid-permeable material at the center of the diaper, and the side flap 5 portion of the diaper is resistant to liquid permeation. It is the example which has arrange | positioned the top sheet 18 (side sheet 18b) which consists of ventilation water-repellent material which shows.

  Further, for example, the back sheet may be configured to match the outer shape of the diaper, or a sheet material (cover sheet) may be bonded to the outer surface side of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet. In addition, in the tape-type diaper 100 shown in FIG. 26, the example which has arrange | positioned the back seat | sheet 20 of the shape corresponding to the external shape of a diaper is shown. Moreover, the back sheet should just be arrange | positioned in the range which covers an absorber at least. By disposing the back sheet in a range slightly larger than the absorbent body and configuring the side flap portion corresponding to the side portion of the wearer with the cover sheet and the side sheet, a disposable diaper having better breathability can be obtained. You may comprise the said side flap part with a separate nonwoven fabric etc.

  In the tape type diaper 100 of the present embodiment, as shown in FIG. 26, at least the part from which the hole 15 of the absorbent body 22 reaches the crotch part 4 from the front body 2 of the tape type diaper 100, that is, It is preferably formed at the urination site. By comprising in this way, while being excellent in the excretion of excretory fluid (urine), the fitting property with respect to a wearer becomes favorable. In addition, it is possible to effectively prevent the excretory liquid from returning.

[2-2] Solid gather:
In the tape type diaper of this embodiment, in order to prevent the side leakage of the urine excreted by the wearer, a three-dimensional gather may be provided. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather becomes a breakwater, and side leakage from the opening around the leg of the diaper can be effectively prevented.

  The structure used for the conventional disposable diaper and other absorbent articles can be adopted as the structure of the three-dimensional gather. For example, a stretchable material (a three-dimensional gathered stretchable material) disposed on a part of the water-repellent sheet material and a sheet (gather) formed on the sheet material by the three-dimensional gathered stretchable material can be suitably used.

  The three-dimensional gather may be formed of a sheet material that is completely different from the top sheet and the back sheet, but may be formed by folding back a top sheet such as a center sheet or a side sheet. For example, the tape-type diaper 100 shown in FIG. 26 is an example in which the three-dimensional gather 26 (26a, 26b) is formed by folding back the side sheet 18b. However, the three-dimensional gather may be formed by folding back a member other than the top sheet such as a back sheet.

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, in the tape-type diaper 100 shown in FIG. 26, a pair of three-dimensional gathers 26 (26a, 26b) are continuously formed from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. An example is shown. Further, at least one pair of solid gathers must be formed, but two or more pairs may be formed.

  The three-dimensional gather may be an inward gather that tilts toward the inside of the diaper, or may be an outward gather that tilts toward the outside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction. For example, the tape-type diaper 100 shown in FIG. 26 is an example in which the three-dimensional gather 26 (26a, 26b) is inwardly gathered.

[2-3] Fastening tape:
A fastening tape is a tape for making a wearer wear a tape type diaper. There are no particular restrictions on the shape and structure of the diaper so long as it can be attached to the wearer by fixing the back and abdomen of the diaper to a pant-type diaper.

  For example, a tape-type diaper 100 shown in FIG. 26 is one in which two pairs of fastening tapes 7 are arranged on both side edges of the back body 6. These fastening tapes 7 are configured to be capable of being attached to a front patch 11 disposed on the outer surface of the front body 2. By sticking the fastening tape 7 to the front patch 11, the back body 6 and the front body 2 of the diaper are fixed to each other, and the diaper can be attached to the wearer.

  Moreover, although the tape-type diaper 100 shown in FIG. 26 is provided with two pairs of fastening tapes 7, the same effect can be obtained even when provided with only one pair of fastening tapes 7 or with three or more pairs. be able to. Moreover, the double tape which the two fastening parts extended to the front-end | tip of a pair of fastening tape 7 may be sufficient.

  In the present invention, as the fastening tape, any of an adhesive tape, a mechanical fastener and the like may be used. The mechanical fastener is, for example, a convex member (hook member) having a large number of protrusions (such as hooks, mushrooms, hooks, etc.) formed on the surface and loop fibers disposed on the surface, or short fibers. A combination of a concave material (loop material) such as a configured nonwoven fabric is often used. In this fastener, the hook material is superimposed on the surface of the loop material, and a large number of protrusions of the hook material are engaged with the surface of the loop material, so that both members can be peeled and firmly fixed. It can be done.

[2-4] Various elastic materials:
In a tape-type diaper, it is preferable to arrange an elastic material around the legs and arrange an elastic material around the waist.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and liquid leakage from the leg opening can be effectively prevented. Further, when the leg stretchable material is disposed, the leg stretchable material contracts on both sides of the absorbent body when changing the diaper, so that the vicinity of the crotch portion is deformed into a bowl shape and a recess is formed. For this reason, excretion fluids, such as urine and body fluid, accumulate in the crevice, and can change a diaper easily, without spilling excretion fluid.

  For example, a tape-type diaper 100 shown in FIG. 26 is an example in which leg gathers are formed by arranging two leg-stretchable elastic members 40 linearly along the longitudinal direction of the diaper. The leg-around elastic member 40 is made of rubber thread. However, the leg-surrounding elastic members are not necessarily arranged linearly, and may be arranged in a curved line along the curve of the leg-periphery opening, for example.

  For example, the leg elastic member 40 is preferably formed on the outer side of the standing line 46 of the three-dimensional gather 26 as in the tape-type diaper 100 shown in FIG. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  In addition, although the tape type diaper 100 shown in FIG. 26 showed the example which made the shape, arrangement position, arrangement number, etc. of the leg periphery elastic material 40 left-right symmetric, these are also included in the scope of the present invention. It is. And in the tape-type diaper 100 shown in FIG. 26, although the example in which the leg periphery elastic material 40 was arrange | positioned two on one side was shown, only one may be arrange | positioned and three or more may be arrange | positioned. Good. Further, when using a plurality of leg-surrounding stretchable materials, the thickness, stretch rate, etc. may be set as appropriate according to the purpose, and it is not necessary to use the same for all.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, so that liquid leakage from the waist can be prevented, the fit of the diaper to the wearer is good, and the diaper is prevented from falling down.

  In addition, the tape-type diaper 100 shown in FIG. 26 is the example which has arrange | positioned the waist surrounding elastic material 42 which consists of a strip-shaped urethane film along the edge of the back body 6 of a diaper. This belt-like waist elastic member 42 may be made of a stretchable foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side).

  For these stretchable materials, after considering the degree of shrinkage of gathers, etc., the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  The stretchable material is preferably fixed in the stretched state in order to exert a sufficient stretch force. For example, when the elastic material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 110 to 400%, and more preferably fixed in a stretched state of 200 to 300%. By fixing in the extended state in such a range, a sufficient stretching force can be applied.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[2-5] Tape type diaper manufacturing method:
Hereinafter, the manufacturing method of the tape type diaper which is an absorbent article of this invention is demonstrated in the example in the case of manufacturing the tape type diaper 100 shown in FIG. First, the hole 15 is formed in the absorber used in the tape-type diaper (in FIG. 26, the absorber 22 of the first absorbent article). Specifically, a convex portion is formed in a portion corresponding to the hole portion in the concave portion of the forming drum formed so as to be stacked in the shape of the absorbent body, and pulp or the like is stacked in the absorbent body. The method of forming the hole part which is not fiberized can be mentioned. Moreover, after forming the absorber without a hole part, the part corresponding to a hole part is extracted by methods, such as punching, and a hole part can also be formed.

  Next, on the upper surface of a long sheet material (back sheet material) that is the material of the back sheet 20, the diffusion sheet 23, the absorber 22 in which the above-described hole 15 is formed, and the leg-surrounding elastic material 40 are placed, Furthermore, the laminated body (diaper continuous body) used as the intermediate body of a diaper is obtained by mounting the elongate sheet material (top sheet material) used as the material of the top sheet 18 on the upper surface. Under the present circumstances, the diffusion sheet 23 is arrange | positioned so that the opening part of the hole 15 of the back surface side of the absorber 22 may be covered. In addition, two types of top sheet materials are used: a top sheet material corresponding to the center sheet 18a and a top sheet material corresponding to the side sheet 18b. A three-dimensional gather 26 is formed by providing a folded portion on the sheet material corresponding to the side sheet 18b.

  In addition, when manufacturing what has a 2nd absorber as shown in FIG. 12, for example, a 2nd absorber is arrange | positioned on the back surface of a diffusion sheet. A second hole may be formed in the second absorbent body, and a second diffusion sheet may be disposed on the back surface of the second absorbent body.

  In the diaper continuous body obtained as described above, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (R cut) to form an opening around the leg. Finally, the fastening tape 7 is attached, and the continuous diaper is cut into individual diapers, whereby the tape-type diaper 100 is manufactured.

  In addition to the above-described method, a fastening tape is previously attached to the top sheet material, and a diffusion sheet, an absorbent body and a leg-around elastic material are placed on the upper surface of the back sheet material, and further, the fastening is performed on the upper surface. A diaper continuous body may be obtained by placing a top sheet material provided with a tape. The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material from a roller, continuous production of a tape-type diaper becomes possible, which contributes to improvement of productivity.

[2-6] Applicable objects for disposable diapers:
The application object of the disposable diaper which is an absorptive article of the present invention is not restricted to the above-mentioned 1 piece type tape type diaper, for example, can also be applied to a 2 piece type tape type diaper. Moreover, it is applicable also to a 1 piece type and 2 piece type underpants type diaper. Moreover, it can also be applied to a urine pad that is used by being placed in a crotch part such as a diaper. That is, even in these disposable diapers, the one-piece type tape-type diaper described so far can be obtained by having the absorbent body and the diffusion sheet configured in the same manner as the first to third absorbent articles. Similar effects can be obtained.

  “Two-piece type” means an absorbent main body that functions to absorb and retain the excrement of the wearer (absorption / holding function) and an exterior member that functions to encapsulate the wearer's body (mounting function) And a diaper of the type in which an absorbent main body is disposed inside the exterior member.

  The absorbent main body is a member including an absorbent body, a top sheet, and a back sheet as constituent elements, and is manufactured by sandwiching the absorbent body between the top sheet and the back sheet and sealing the peripheral edge of the absorbent body. Can do. An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive.

  On the other hand, the exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch part, and the back body. The two-piece type tape-type diapers and pants-type diapers absorb and retain the excretion fluid of the wearer, and the absorption / retention function is exclusively performed by the absorbent main body. There is no need to use an impermeable material. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples.

[1] Selection of diffusion sheet:
In the absorbent article of the present invention, since a diffusion sheet having higher liquid permeability than the absorbent body used for the absorbent article is used, the liquid permeability of the absorbent body and the diffusion sheet used for the absorbent article is compared, A diffusion sheet was selected.

  In the selection of the diffusion sheet, the following two types of absorbers a and b were used as the absorber, and the following three types of diffusion sheets a to c were used as the diffusion sheet.

[Absorber a]
As the absorber a, an absorber composed only of pulp was used. The size of the absorber a is 425 mm × 100 mm, and the basis weight is 200 g / m ² .

[Absorber b]
As the absorber b, an absorber configured so that the ratio of pulp or the like to the highly water-absorbing polymer was 30:70 was used. “Pulp etc.” refers to materials other than the superabsorbent polymer among the materials used for the absorbent material. The size of the absorber b is 310 mm × 150 mm, and the basis weight is 350 g / m ² .

[Diffusion sheet a]
As the diffusion sheet a, a bulky nonwoven fabric (air-through nonwoven fabric, trade name “Fukuron P20” manufactured by Fukusuke Kogyo Co., Ltd.) was used. The basis weight of the diffusion sheet a is 19.5 g / m ² .

[Diffusion sheet b]
As the diffusion sheet “b”, a porous film (trade name “AquiDry”) manufactured by Tredegar was used. This porous film has a thickness of 1000 μm and a basis weight of 36.3 g / m ² .

[Diffusion sheet c]
As the diffusion sheet c, tissue was used. The basis weight of this tissue is 19.5 g / m ² .

[Top sheet, back sheet]
Card embossing (manufactured by Rengo Non-Woven Products, basis weight 23 g / m ² ) was used as the top sheet, and a liquid-impermeable sheet was used as the back sheet.

[1-1] Selection method of diffusion sheet:
The method of selecting a diffusion sheet is as follows. First, the above-described absorbers a and b (test bodies A and B) and an absorber (test) in which any of the diffusion sheets a to c is arranged on the upper surface of these absorbers. Bodies C to G).

  Next, the back sheet is arranged on the lower surface of each absorber (test bodies A to G), and further, the upper surface of each absorber (test bodies A to G) (in the test bodies C to G, diffusion sheet). The top sheet is disposed on the upper surface, and the respective absorbent bodies (test bodies A to G) are interposed by the top sheet and the back sheet.

  After the test specimens A to G are interposed by the top sheet and the back sheet in this way, 100 ml of physiological saline (0.9 mass% NaCl) that is regarded as an excretory liquid is supplied to the test specimens A to G. ) And the time (absorption time) taken for all the physiological saline to be absorbed by the test bodies A to G is measured. In the test bodies C to G in which any one of the diffusion sheets a to c was arranged, physiological saline was absorbed from the surface of the diffusion sheet.

  In addition, when the physiological saline is absorbed by the test bodies A to G, an absorption rate measuring plate (100 mm × 100 mm × 8.5 mm made of stainless steel, in which a hole having a diameter of 24 mm is formed at the center thereof, 650 g) is placed on the surface of the specimens A to G, physiological saline is dropped into the holes of the absorption rate measuring plate, and the physiological saline is absorbed by the specimens A to G, and the absorption rate measuring plate The absorption time (seconds) until it was not confirmed from the hole part of was measured.

  Further, from the comparison of the absorption time (seconds) of the absorbers a and b alone (test bodies A and B) and the absorption time (second) of the test body with the diffusion sheet disposed on the surface, the liquid permeation of each diffusion sheet was confirmed. Sexuality was evaluated. In the case where the absorption time is shorter in the test body in which the diffusion sheet is disposed, the liquid permeability of the diffusion sheet disposed on the surface thereof is higher than that in the absorbent body. When the absorption time is shorter in the test bodies A and B), the liquid permeability of the diffusion sheet disposed on the surface thereof is lower than that in the absorber. Table 1 shows the configurations of the specimens A to G and the measurement results of the absorption time.

  As shown in Table 1, the bulky nonwoven fabric (air-through nonwoven fabric) of the diffusion sheet a and the porous film of the diffusion sheet b have higher liquid permeability than the absorbent bodies a and b (test bodies A and B). I understand that. On the other hand, when the tissue of the diffusion sheet c is arranged on the surface of the absorber a, the absorption time is increased as compared with the case of the absorber a alone, and the liquid permeability is lower than that of the absorber.

[2] Evaluation of absorbency of absorbent articles (1):
The absorbent article absorbs 200 ml of physiological saline (0.9 mass% NaCl) that is considered to be excreted liquid, and measures the time (absorption time) required for all the physiological saline to be absorbed by the absorbent article. Then, evaluation (1) of the absorptivity of an absorptive article was performed. The method for measuring the absorption time is the same as the method for measuring the absorption time performed when selecting the diffusion sheet described above, using an absorption rate measuring plate, and 200 ml of physiological saline (0.9% by mass) as an excretory fluid. The absorption time (seconds) until NaCl) was absorbed by the absorbent article was measured.

  In the absorptive evaluation (1) of the absorbent article, an absorbent body provided with a first absorbent body (1) and a second absorbent body (1) shown below was used. Moreover, when arrange | positioning a diffusion sheet in an absorbent article, the diffusion sheet which consists of the material similar to either of the diffusion sheets a-c used for selection of the above-mentioned diffusion sheet was used.

[First absorber (1)]
As a 1st absorber (1), the absorber comprised only from the pulp which was comprised similarly to the absorber a used for selection of the said diffusion sheet was used. The magnitude | size of a 1st absorber (1) is 425 mm x 100 mm, and basic weight is 200 g / m < ² >.

[Second absorber (1)]
As a 2nd absorber (1), the absorber comprised so that the ratio of a pulp etc. and a super absorbent polymer might be set to 3: 2. “Pulp etc.” refers to materials other than the superabsorbent polymer among the materials used for the absorbent material. The size of the second absorbent body (1) is 425 mm × 100 mm, and the basis weight is 600 g / m ² .

[Example 1]
An absorber, a top sheet that is arranged so as to cover the surface of the absorber and at least a part thereof is made of a liquid-permeable material, and a back sheet that is arranged on the back surface of the absorber and made of a liquid-impermeable material. The provided absorbent article was manufactured.

  The absorbent body of the absorbent article of the present embodiment has the first absorbent body (1) and the second absorbent body (1) described above, and the first absorbent body (1) has a surface thereof. A hole penetrating from the back to the back was formed. Further, the diffusion is performed between the first absorber (1) and the second absorber (1) so as to cover the region including the opening of the hole of the first absorber (1). The bulky nonwoven fabric (air through nonwoven fabric) of the diffusion sheet a used for the selection of the sheet was disposed. The size of the opening of the hole formed in the first absorber (1) was 20 mm × 60 mm. In addition, when arrange | positioning a diffusion sheet, it arrange | positioned so that the whole back surface area of a 1st absorber (1) might be covered.

Further, card embossing (manufactured by Rengo Non-Woven Products, basis weight 23 g / m ² ) was used as the top sheet, and a liquid-impermeable sheet was used as the back sheet.

[Example 2]
Except for using the porous film of the diffusion sheet b used for the selection of the diffusion sheet as the diffusion sheet disposed between the first absorbent body (1) and the second absorbent body (1). An absorbent article constructed similarly to the absorbent article of Example 1 was produced.

[Comparative Example 1]
Without forming a hole in the first absorbent body (1) and using a diffusion sheet, an absorbent body obtained by simply laminating the first absorbent body (1) and the second absorbent body (1) An absorbent article having the same configuration as that of the absorbent article of Example 1 was manufactured except that it was used.

[Comparative Example 2]
The absorbent article of Example 1 was used except that an absorbent body in which the first absorbent body (1) and the second absorbent body (1) in which holes were formed was used without using a diffusion sheet. An absorbent article constructed similarly was produced.

[Comparative Example 3]
Example 1 except that the diffusion sheet c used for selecting the diffusion sheet was used as the diffusion sheet disposed between the first absorbent body (1) and the second absorbent body (1). An absorbent article constructed in the same manner as the absorbent article was produced. The absorbent article of Comparative Example 3 is a combination of the same absorber and diffusion sheet as the test body E in the selection of the diffusion sheet.

  Table 2 shows the configurations of the absorbent articles of Examples 1 and 2 and Comparative Examples 1 to 3 described above and the results of the evaluation of the absorbency described above.

  As shown in Table 2, the absorbent articles of Examples 1 and 2 were shorter in the absorption time of physiological saline and excellent in absorbability than the absorbent articles of Comparative Examples 1 and 2. . Moreover, since the comparative example 3 which is an absorbent article which has arrange | positioned the diffusion sheet similarly to the absorbent article of Example 1 and 2 uses the diffusion sheet whose liquid permeability is lower than a 1st absorber. The absorption time of physiological saline was longer than that of the absorbent article of Comparative Example 2 in which no diffusion sheet was arranged.

[3] Evaluation of absorbency of absorbent article (2):
The absorbent article absorbs 100, 200, or 300 ml of physiological saline (0.9% by mass NaCl) that is considered as excretory fluid, and the time taken for all the physiological saline to be absorbed by the absorbent article ( Absorption time) was measured to evaluate the absorbency of the absorbent article (2). The measuring method of absorption time used the method similar to evaluation (1) of the absorptivity of an above-mentioned absorbent article.

  In the absorptive evaluation (2) of the absorbent article, an absorbent body provided with the following first absorbent body (2) and second absorbent body (2) was used. Moreover, when arrange | positioning a diffusion sheet in an absorbent article, the diffusion sheet which consists of a material similar to the diffusion sheet a or b used for selection of the above-mentioned diffusion sheet was used.

[First absorber (2)]
As a 1st absorber (2), it is comprised similarly to the absorber b used for selection of the said diffusion sheet so that the ratio of a pulp etc. and a super absorbent polymer may be set to 30:70. The constructed absorber was used. “Pulp etc.” refers to materials other than the superabsorbent polymer among the materials used for the absorbent material. The size of the first absorber (2) is 310 mm × 150 mm, and the basis weight is 350 g / m ² .

[Second absorber (2)]
As a 2nd absorber (2), the absorber comprised so that the ratio of a pulp etc. and a super absorbent polymer might be set to 30:70 was used. “Pulp etc.” refers to materials other than the superabsorbent polymer among the materials used for the absorbent material. The size of the second absorbent body (2) is 310 mm × 150 mm, and the basis weight is 350 g / m ² .

Example 3
An absorbent body, a top sheet of card embossing (Rengo Non-Woven Products, basis weight 23 g / m ² ), which is disposed so as to cover the surface of the absorbent body, and a back surface of the absorbent body. An absorbent article comprising a back sheet made of a permeable material was produced.

  The absorbent body of the absorbent article of the present embodiment has the first absorbent body (2) and the second absorbent body (2) described above, and the first absorbent body (2) has a surface thereof. A hole penetrating from the back to the back was formed. Further, the diffusion is performed between the first absorber (2) and the second absorber (2) so as to cover the region including the opening of the hole of the first absorber (2). The bulky nonwoven fabric (air through nonwoven fabric) of the diffusion sheet a used for the selection of the sheet was disposed. The size of the opening of the hole formed in the first absorber (2) was 20 mm × 60 mm. In addition, when arrange | positioning a diffusion sheet, it arrange | positioned so that the back surface whole region of a 1st absorber (2) might be covered. Further, the same top sheet and back sheet as in Example 1 were used. Hereinafter, the diffusion sheet disposed on the back surface of the first absorber (2) may be referred to as a first diffusion sheet. Table 3 shows the configuration of the absorbent article of Example 3.

Example 4
The configuration is the same as that of the absorbent article of Example 3 except that the second absorbent body is formed with a second hole penetrating from the front surface to the back surface of the second absorbent body (2). Manufactured absorbent article (Example 4). In addition, the 2nd hole formed in the 2nd absorber (2) was formed so that it might become the same position and the same shape as the hole of the 1st absorber (2).

Example 5
Other than arranging a diffusion sheet (second diffusion sheet) on the back surface of the second absorber (2) so as to cover the region including the opening of the second hole of the second absorber (2). Manufactured the absorbent article (Example 5) comprised similarly to the absorbent article of Example 4. FIG. In addition, as the 2nd diffusion sheet arrange | positioned on the back surface of the 2nd absorber (2), the bulky nonwoven fabric (air through nonwoven fabric) of the diffusion sheet a used for selection of the said diffusion sheet was used.

Example 6
Without using the first diffusion sheet, the diffusion sheet was configured in the same manner as the absorbent article of Example 5 except that only the second diffusion sheet was disposed on the back surface of the second absorber. An absorbent article (Example 6) was produced.

Example 7
The absorbent article (Example 7) comprised similarly to the absorbent article of Example 5 except having used the porous film of the diffusion sheet b used for selection of the said diffusion sheet as a 1st diffusion sheet. ) Was manufactured.

Example 8
An absorbent article (Example 8) configured in the same manner as the absorbent article of Example 5 except that the porous film of the diffusion sheet b used for selecting the diffusion sheet was used as the second diffusion sheet. ) Was manufactured.

Example 9
Absorbent article constructed in the same manner as the absorbent article of Example 5 except that the second hole portion of the second absorbent body was formed at a position different from the hole portion of the first absorbent body (Example) 9) was produced.

[Comparative Examples 4 to 8]
About the diffusion sheet arrange | positioned in the hole part of a 1st absorber and a 2nd absorber, and the back surface of each absorber, as having shown as Table 4, it is the same as that of the absorbent article of Example 3. Constructed absorbent articles (Comparative Examples 4-8) were manufactured. In the absorbent articles of Comparative Examples 7 and 8, the bulky nonwoven fabric (air-through nonwoven fabric) of the diffusion sheet a used for selecting the diffusion sheet is disposed on the surface of the first absorbent body as the surface-side diffusion sheet. did.

Example 10
As shown in Table 5, an absorbent article (Example 10) configured in the same manner as the absorbent article of Example 3 was manufactured except that the size of the first diffusion sheet was a rectangle of 200 mm × 150 mm as shown in Table 5. did. This diffusion sheet was also arranged so as to cover the region including the opening of the hole of the first absorber.

Example 11
An absorbent article (Example 11) configured in the same manner as the absorbent article of Example 1 was manufactured except that the size of the first diffusion sheet was a rectangle of 200 mm × 100 mm. This diffusion sheet was also arranged so as to cover the region including the opening of the hole of the first absorber.

[Comparative Example 9]
An absorbent article (Comparative Example 9) configured similarly to the absorbent article of Comparative Example 8 was produced.

[4] Consideration:
The absorbent articles of the present invention of Examples 1 to 9 were superior in absorbency because the absorption time of physiological saline as an excretory liquid was shorter than that of the comparative absorbent article. In addition, as shown in Table 2, Comparative Example 3 using a diffusion sheet (tissue) having a lower liquid permeability than the absorber is similar to Examples 1 and 2 on the back surface of the first absorber. However, the absorption time was increased.

  Moreover, as shown in Table 3, Examples 7 and 8 using a porous film as a diffusion sheet have a significantly shorter absorption time than other examples, and are extremely excellent in absorbability. It was. As in Example 9 in Table 3, the first diffusion sheet (2) and the second diffusion sheet (2) may be the same material, but different materials may be used as in Examples 7 and 8. Good.

  Further, as shown in Table 5, also in the liquid absorption test in which a large amount of physiological saline of 200 ml or 300 ml was absorbed, the absorption time was shorter than that of the absorbent article of Comparative Example 9, and the absorbency It was confirmed that it was excellent.

  The absorbent article of the present invention is a urine pad for absorbing excretory fluid by being placed inside a tape-type or pants-type disposable diaper or clothing for infants or adults such as the elderly or the disabled. It can be used as a sanitary napkin that absorbs blood, a sheet of cage that absorbs cage, and the like.

It is a partially notched top view which shows one Embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the 1st absorbent article shown in FIG. 1 along the A-A 'line. It is a schematic sectional drawing which shows the cross section which cut | disconnected the 1st absorbent article shown in FIG. 1 along the B-B 'line. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the 1st absorbent article shown in FIG. 4 along the C-C 'line. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the absorbent article shown in FIG. 6 along the D-D 'line. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a partially notched top view which shows other embodiment of the 1st absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is sectional drawing which shows other embodiment of the 1st absorbent article of this invention. It is sectional drawing which shows other embodiment of the 1st absorbent article of this invention. It is a partially notched top view which shows one Embodiment of the 2nd absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the 2nd absorbent article shown in FIG. 11 along the E-E 'line. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is a partially notched top view which shows one Embodiment of the 3rd absorbent article of this invention, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the 3rd absorbent article shown in FIG. 19 along the F-F 'line. It is sectional drawing which shows other embodiment of the 3rd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 1st absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is sectional drawing which shows other embodiment of the 2nd absorbent article of this invention. It is a partially notched top view which shows the tape-type diaper as other embodiment of the absorbent article of this invention, is a figure which expand | deploys a tape-type diaper and shows the state seen from the top sheet side. It is a schematic perspective view which shows the underpants type diaper as other embodiment of the absorbent article of this invention, and is a figure which shows the state which looked at the underpants type diaper from the front.

Explanation of symbols

1: Absorbent article (first absorbent article), 2: front body, 2a, 2b: side edge, 4: crotch, 5: side flap, 6: back body, 6a, 6b: side edge, 7: Fastening tape, 8: Joint, 10: Opening around waist, 11: Front patch, 12, 12a, 12b: Opening around leg, 14: Absorbent body, 15: Hole, 18: Top sheet, 18a : Center sheet, 18b: Side sheet, 20: Back sheet, 22: Absorber, 23: Diffusion sheet, 26, 26a, 26b: Three-dimensional gather, 36, 36a, 36b: Three-dimensional gather stretchable material, 40: Stretch material around leg 42: elastic material around the waist, 46: standing line, 51: hydrophilic sheet, 61: absorbent article (second absorbent article), 62: absorbent, 62a: first absorbent, 62b: second Absorber, 63: diffusion , 65: hole, 66: hole (second hole), 71: absorbent article (third absorbent article), 72: absorbent, 72a: first absorbent, 72b: second 73: diffusion sheet (first diffusion sheet), 74: diffusion sheet (second diffusion sheet), 75: hole, 76: hole (second hole), 100: tape-type diaper 110: Pants-type diaper.

Claims (11)

An absorber, a topsheet that is arranged so as to cover the surface of the absorber, and at least a part is made of a liquid-permeable material; and a backsheet that is arranged on the back surface of the absorber and is made of a liquid-impermeable material; An absorbent article comprising:
The absorber is formed with a hole penetrating from the front surface to the back surface of the absorber.
The top sheet is disposed on the front surface of the absorber, and the diffusion sheet is higher in liquid permeability than the absorber so as to cover a region including the opening of the hole on the back surface of the absorber. An absorbent article in which is disposed.   The top sheet covers the surface of the absorber, covers the inner peripheral surface of the hole of the absorber, and the diffusion sheet exposed from the hole, and the top sheet The absorptive article according to claim 1 joined with said diffusion sheet in the opening of said hole on the back side of said absorber. An absorber, a topsheet that is arranged so as to cover the surface of the absorber, and at least a part is made of a liquid-permeable material; and a backsheet that is arranged on the back surface of the absorber and is made of a liquid-impermeable material; An absorbent article comprising:
The absorber has a first absorber and a second absorber, and the first absorber has a hole that penetrates from the surface of the first absorber to the back surface,
The top sheet is disposed on the surface of the first absorbent body, and the opening of the hole of the first absorbent body is between the first absorbent body and the second absorbent body. An absorbent article in which a diffusion sheet having higher liquid permeability than the first absorbent body is disposed so as to cover a region including the portion.   The top sheet covers the surface of the first absorber, and covers the inner peripheral surface of the hole portion of the first absorber and the diffusion sheet exposed from the hole portion. The absorbent article according to claim 3, wherein the top sheet and the diffusion sheet are joined at an opening of the hole on the back side of the first absorbent body.   The second absorber is formed with a hole penetrating from the front surface to the back surface of the second absorber, and the backsheet covers the back surface of the second absorber, and Covering the inner peripheral surface of the hole of the second absorber and the back surface of the diffusion sheet exposed from the hole of the second absorber, the back sheet and the diffusion sheet The absorbent article according to claim 3 or 4, wherein the absorbent article is bonded at an opening of the hole on the surface side of the second absorbent body. An absorber, a topsheet that is arranged so as to cover the surface of the absorber, and at least a part is made of a liquid-permeable material; and a backsheet that is arranged on the back surface of the absorber and is made of a liquid-impermeable material; An absorbent article comprising:
The absorber includes a first absorber and a second absorber, and the first absorber is formed with a hole penetrating from the front surface to the back surface of the first absorber. The second absorber is formed with a hole penetrating from the front surface to the back surface of the second absorber,
The top sheet is disposed on the surface of the first absorbent body, and the opening of the hole of the first absorbent body is between the first absorbent body and the second absorbent body. A first diffusion sheet having a higher liquid permeability than the first absorber is disposed so as to cover the region including the portion, and
On the back surface of the second absorber, a second diffusion sheet having higher liquid permeability than the second absorber so as to cover a region including the opening of the hole of the second absorber. An absorbent article in which is disposed.   The top sheet covers the surface of the first absorber, and covers the inner peripheral surface of the hole of the first absorber and the first diffusion sheet exposed from the hole. The absorbent article according to claim 6, wherein the top sheet and the first diffusion sheet are joined at an opening of the hole on the back side of the first absorbent body.   The absorbent article according to any one of claims 5 to 7, wherein the hole portion of the first absorbent body and the hole portion of the second absorbent body are formed at different positions.   The absorptive article according to any one of claims 5 to 7 in which said hole of said 1st absorber and said hole of said 2nd absorber are formed in the same position.   The absorbent article according to any one of claims 1 to 9, wherein the hole formed in the absorbent body has an elongated shape in which an opening of the hole extends in a longitudinal direction of the absorbent body.   The absorptive article according to any one of claims 1 to 10 in which said hole formed in said absorber is formed in a wearer's excretion part.

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