JP2008272303A - Absorbent article and manufacturing method thereof - Google Patents

Abstract

[PROBLEMS] To provide an excellent liquid absorbency even when it is small and thin, and has no discomfort when touching the skin, and provides a soft and smooth feel even when worn for a long time or after absorbing liquid. Provide the goods. Further, the present invention provides an absorbent article that can be folded and carried, and is excellent in liquid absorbency and cushioning properties when it is then expanded and worn, and provides a comfortable wearing feeling immediately after wearing. Moreover, the manufacturing method which can manufacture said outstanding absorbent article stably with sufficient precision and efficiently is provided.
[MEANS FOR SOLVING PROBLEMS] An absorbent article in which an absorbent is provided between a top sheet and a back sheet, and a plurality of rows extending along the longitudinal direction of the absorbent body in at least a central liquid absorption region in the longitudinal direction of the absorbent body An absorptive article comprising a substantially corrugated structure portion having a wavy shape and a non-corrugated structure portion having substantially no height at both longitudinal ends of the substantially corrugated structure portion.
[Selection] Figure 1

Description

  The present invention relates to an absorbent article and a manufacturing method thereof, and more particularly to a thin absorbent article suitable for a panty liner and a manufacturing method thereof.

Absorbent articles used as a sheet for measures against cages such as panty liners and cage sheets are required to have not only excellent absorbability of liquid and the like, but also comfort and good touch feeling when worn. And since this panty liner is usually distinguished from a napkin and used for a long time in a situation where the amount of excretory fluid is not so much, particularly a good wearing feeling is emphasized. For this reason, it is preferable to use a thin, thin, cushioning and soft touch that does not feel uncomfortable and feels like a part of underwear.
However, even if the liquid absorption region is made small and thin, the basic performance required for the absorbent article cannot be impaired. Furthermore, there are differences between individuals and timing, and the viscosities of liquids vary and the amount of excretion changes. In such cases, liquids must be absorbed quickly. And since panty liners are often used for preparations for cages, it is essential to have excellent portability.

  On the other hand, development of materials having liquid absorbency is underway, and studies are being made on improvements in processing methods for absorbent materials. For example, there has been disclosed an absorptive core structure such as a diaper having a concavo-convex structure processed so as not to cause material destruction (Patent Document 1). According to the absorbent core structure, liquid diffusibility can be obtained by softening and partial densification. Moreover, the toilet paper by which a convex part becomes an extending | stretching part is proposed (patent document 2), According to this, when it is made to flow into water with a toilet bowl, it is said that it can implement | achieve quick unraveling easily.

  However, it is unclear whether the above-described absorbent material can be used for thin absorbent articles. In particular, in panty liners that require high liquid absorbency while having a small size as described above, and that require even a fine tactile sensation, an absorbent body having a concavo-convex structure and a diffusibility derived from the structure, and water decomposability. It cannot be said that the material that it has can be diverted as it is.

Special table 2000-500712 Special table 2003-530963

  The present invention provides excellent liquid absorbency even when it is small and thin, and has no sense of incongruity when touching the skin, giving a soft and smooth feel even when worn for a long time or after absorbing liquid The purpose is to provide sex goods. It is another object of the present invention to provide an absorbent article that can be folded and carried, and that is excellent in liquid absorbency and cushioning properties and that provides a comfortable wearing feeling immediately after wearing, even when the bag is spread and worn. Moreover, it aims at provision of the manufacturing method which can manufacture said outstanding absorbent article stably and accurately and efficiently.

The present invention is an absorbent article in which an absorber is provided between a top sheet and a back sheet, and a plurality of the articles extend along at least the central liquid absorption region in the longitudinal direction of the absorber along the longitudinal direction of the absorber. Provided is an absorbent article comprising a substantially corrugated structure portion having a wavy shape in a row and a non-corrugated structure portion having substantially no height at both longitudinal ends of the substantially corrugated structure portion By doing so, the above-described problems have been achieved.
In addition, the present invention provides a preferable method for producing the absorbent article as described above.
(A) a step of shaping the absorbent sheet so as to provide a substantially corrugated structure having a ridge line extending in the width direction of the absorbent sheet;
(B) cutting the absorbent sheet opposite along the width direction to form an absorbent body in which the top of the substantially corrugated structure portion extends in the longitudinal direction;
(C) rotating the absorbent body by 90 ° to match the longitudinal direction of the absorbent body with the feeding direction of the reverse side of the back sheet;
(D) a step of installing the absorber on the back side of the back sheet; and (e) sending a top sheet side to the back side of the back sheet on which the absorber is installed to form a composite sheet counter, The manufacturing method of the said absorbent article which has the process sent between heat rolls and between cutter rolls is provided.
In the present invention, the substantially corrugated structure is basically a corrugated structure, but includes a structure having a substantially rounded cross section at the top.

  The absorbent article of the present invention can expand the surface area by forming a substantially corrugated structure even when it is thin and small in size, exhibits high liquid absorbency, and has increased cushioning in the thickness direction when touching the skin. There is an excellent effect that there is no sense of incongruity. Further, the absorbent article of the present invention absorbs even a highly viscous liquid contained in a cage quickly, and has excellent liquid retention, particularly when preventing side leakage and wearing for a long time. Even between soft and smooth wearing. Furthermore, the absorbent article of the present invention realizes both the above-described good liquid absorbency and cushioning properties even when it is folded and carried compactly and then worn, and it is comfortable immediately after wearing. A comfortable wearing feeling is obtained. Moreover, according to the manufacturing method of this invention, said outstanding absorbent article can be manufactured stably and accurately and efficiently.

Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view schematically showing a panty liner as a preferred embodiment of the absorbent article of the present invention with a part cut away. As shown in the figure, in the absorbent article of the present embodiment, the absorbent body 1 is provided between the top sheet 2 and the back sheet 3. At this time, it is preferable that the absorbent article has a bowl shape having a portion constricted in the center as shown in the figure. The absorbent article of the present embodiment is placed so that its longitudinal direction (X direction) extends from the abdominal side to the buttocks side, and at that time, the above-mentioned central constricted part fits the shape of the roots (hip joints) of both feet, Misalignment and twist are less likely to occur.

When describing each constituent member in the absorbent article of the present embodiment, the top sheet 2 is preferably made of a soft material that is liquid-permeable and hits the skin. For example, a non-woven fabric made of natural fibers such as cotton or a non-woven fabric made of various synthetic fibers subjected to hydrophilic treatment can be used. The basis weight of the topsheet ² is preferably 15 to 60 g / m ^{2 and} more preferably about 20 to 40 g / m ² . The manufacturing method of a surface sheet can be suitably selected according to the composition and characteristic of the fiber to be used. For example, it is preferable to manufacture by a spunlace method, a thermal bonding method, an air-through method, a calendar bond method, a spunbond method, or the like. The top sheet may be a single sheet or a combination of a plurality of sheets.

  The back sheet 3 is preferably made of a liquid-impermeable sheet material or a composite sheet material obtained by combining it with another sheet material. As the liquid-impermeable sheet material, for example, various synthetic resin films can be used. In the absorbent article of the present invention, it is preferable to use a composite back sheet 3 in which a liquid absorbent layer 3b and a liquid impermeable layer 3a are overlapped as shown in FIG. 3 to be described later (FIG. 3). FIG. 3 is a cross-sectional view schematically showing an enlarged cross section taken along line III-III of the absorbent article shown in FIG. As the liquid absorptive layer 3b, the material used for the absorber described below can be used. It is preferable to use the material used for the liquid-impermeable sheet material for the liquid-impermeable layer 3a. At this time, it is preferable that the liquid-absorbing layer 3b and the liquid-impermeable layer 3a are bonded and fixed with an adhesive or the like.

The back sheet 3 may be provided with water vapor permeability as required. The basis weight of the backsheet 3 is preferably 15 to 60 g / ^{m 2,} and more preferably about 20~45g / ^{m 2.} Providing water vapor permeability to the back sheet 3 is particularly preferable when the absorbent article is worn for a long time. At this time, in order to obtain sufficient water vapor permeability, it is preferable to use a porous film having a fine hole formed by stretching a film made of synthetic resin such as polyethylene in which fine powder made of a filler such as calcium carbonate is dispersed. . In order to maintain sufficient strength even in such a porous film, the basis weight is preferably set to, for example, 30 to 45 g / m ² . As described above, the back sheet may be a single sheet or a combination of a plurality of sheets.

  FIG. 2 is a perspective view schematically showing the absorbent body 1 shown in FIG. 1 together with the contour auxiliary line 25 of the absorbent article. In the absorbent article of the present invention, the absorbent body 1 is provided with a substantially corrugated structure portion 28a having a plurality of rows of wavy shapes in the longitudinal direction of the absorbent body in the liquid absorbent region at the center of the absorbent body. Then, both sides of the central substantially corrugated structure portion 28a are non-corrugated structure portions having substantially no height (here, substantially no height means that the sheet is a normal one) This means that it does not exceed a height that swells in the manufacturing and use modes. For example, it means that the height 31 in FIG. 3 described later is 1 mm or less.)

In the absorbent article of the present invention, as shown in FIG. 2, the absorbent body 1 is positioned substantially at the center of the absorbent article in both the longitudinal direction (X direction) and the width direction (Y direction). And it is preferable to install so that the longitudinal direction (X direction) of both may align. By doing in this way, the absorber 1 is arrange | positioned in the place with much excretion, and can absorb a liquid etc. reliably.
Further, the corrugated structure portion 28a is provided in the central region of the absorbent body 1 where a large amount of excretory fluid is usually required and high absorbency is required, so that more reliable absorbability is realized. At this time, as shown in the figure, by disposing the non-corrugated structure portions 29 on both sides of the substantially corrugated structure portion 28a, the liquid absorbed in the central region can be appropriately dammed and inadvertent diffusion can be suppressed.
Furthermore, substantially corrugated structure portions 28b and 28c are provided in the outer region of the non-corrugated structure portion, which gives a better cushioning property and realizes higher liquid absorption and liquid retention.
Here, each of the substantially corrugated structures is arranged so that the top of the corrugated shape extends in the longitudinal direction of the absorbent body 1, and by doing so, liquid leakage in the width direction of the absorbent article, so-called lateral leakage Can be effectively prevented.

Furthermore, when it demonstrates in detail about coexistence with said favorable cushioning property and liquid absorptivity, as FIG. 3 shows, for example from sectional drawing of the absorbent article of this embodiment shown in FIG. Therefore, even when a surface pressure is applied to the absorbent article, the concavo-convex structure of the absorbent body 1 is gently deformed and repels moderately, and can exhibit a good cushioning action. Thereby, the uncomfortable feeling at the time of mounting | wearing can be suppressed.
Moreover, even when the excretory liquid has permeated from the top sheet 2 side, the absorbent body 1 is in contact with the top sheet 2, so that the liquid quickly moves, and further, the liquid is transmitted through the inside of the absorbent body 1, so that the back sheet 3. And reaches the liquid absorption layer 3b provided on the substrate. As a result, the liquid does not stay on the top sheet 2 and the top 32 of the absorbent body 1 and a smooth tactile sensation is maintained. At this time, even if the liquid is not transferred to the liquid absorption layer 3b as shown in FIG. 3, for example, the density of the absorber 1 is adjusted so that the absorber around the valley portion 33 is in a “dense” state. For example, the liquid can be concentrated and absorbed and held there, and the same operation as described above can be realized. In the present invention, in a cross section (cross section shown in FIG. 3) perpendicular to the corrugated structure portion of the corrugated structure portion, one convex shape 35 sandwiched between two trough portions is called a mountain portion, and the peak of the mountain portion is It is referred to as the peak 32 of the peak (also referred to as a wave-shaped peak or simply the peak).

  At this time, the cross-sectional shape in the width direction of each of the substantially corrugated structure portions is not particularly limited as long as an uneven shape is obtained when the corrugated structure portions are continuously provided, but as shown in FIG. It is preferable that the absorber height 31 gradually decreases over 33. By adopting such a configuration, the substantially corrugated structure portion can be made into a corrugated structure that is continuous in a substantially sine curve shape as shown in the figure, and exhibits more excellent effects in the above-described cushioning properties and liquid absorbability retention properties. Yes.

  Here, the height 31 of the substantially corrugated structure portion of the absorbent body 1 is not particularly limited, but is preferably 0.8 to 2.5 mm. Moreover, although the width 34 between top parts of a corrugated structure is not specifically limited, It is preferable that it is 1-3 mm. This inter-top width 34 may be substantially different for each corrugated structure, but as shown in the figure, it is compressed to have the same inter-top width within the absorbent body, and to have a corrugated shape having a uniform repeating pattern. It is preferable from the viewpoint of stability against force and prevention of twisting. By doing so, the arrangement pattern of the substantially corrugated structure portions in each row as described below is a form in which the top portions of the adjacent corrugated portions adjacent to each other with the same width between the top portions (see FIG. 4) or adjacent corrugated portions. It is preferable that the absorbent body can be formed in a form (see FIG. 5) in which the top portions are shifted so that the top portions and the valley portions are connected between the structural portions.

  FIG. 4 is an enlarged plan view schematically showing the absorbent body 1 shown in FIG. 3 in a stretched state. In the absorbent article of the present invention, it is sufficient that the corrugated structure is disposed at least in the central liquid absorbing region 403 so that the wrinkles extend in the longitudinal direction of the absorbent body. It is preferable to provide a plurality of parts by dividing the part in the longitudinal direction of the absorber. At this time, in the structure shown in FIG. 4, the intervals between the apexes of the substantially corrugated structures are substantially equal, and the apexes coincide with each other by an extension line. That is, in this absorber 1, the central region 403 has six lines (mountain fold lines) 47 and five lines (valley fold lines) 48 that form the valleys, thereby providing a substantially corrugated structure. A similar corrugated structure is formed in both side regions 401 and 405. Since it is formed in this way, the shape of each corrugated structure portion is stable and a structure that is strong against twisting can be obtained. However, at this time, the substantially corrugated structure portion is not simply provided by mountain folds and valley folds, but can be formed by appropriately pressing and stretching the sheet material with an uneven roll described later.

  On the other hand, the regions 402 and 404 are non-corrugated structures. In any of the regions 401, 403, and 405, the peak-to-top width 43 of the substantially corrugated structure portion has the same length, and as indicated by the auxiliary line 42, the substantially corrugated structure peak portions. The top of each is continuous in the longitudinal direction. That is, as shown in FIG. 4, the position of the line 47 serving as the peak and the position of the line 48 serving as the valley coincide with each other between the corrugated structures when projected in the longitudinal direction of the absorber. ing.

  In the absorbent article of this invention, it is good also as a form of the absorber 51 shown in FIG. 5 apart from the form of the absorber 1 of said FIG. That is, it is good also as what shifted the top part of the peak part of the substantially corrugated structure part of each row | line | column. Specifically, as indicated by the auxiliary line 52, the line 48 that is the valley of the substantially corrugated structure portion of the central region 403 and the line 47 that is the top of both side portions 401 and 405 are connected, It arrange | positions so that the width | variety 53 between half apexes may shift | deviate. By forming in this way, the height of the corrugated structure portion is likely to be formed lower than that of the absorber of FIG. 4, but the longitudinal length of the non-corrugated structure portion is shorter than that of the absorber of FIG. And becomes a strong structure by twisting.

In view of the use of a panty liner, the material of the absorber does not have to have a liquid absorption capacity as much as that of a napkin. For example, a liquid absorption capacity of about 4 g is sufficient. Therefore, it is preferable to be made of a material that is thin but exhibits good liquid absorbency. For example, it is preferable to use a paper absorbent material or a superabsorbent polymer (polyacrylate salt, polyamino acid salt, etc.) that is usually used for absorbent articles. In addition, for example, a nonwoven fabric of hydrophilic fibers can be used, and those are also preferably used in combination. In the absorbent article of the present invention, for use as a panty liner, in order to form a substantially corrugated structure portion so that the shape of the corrugated structure does not collapse, and without impairing its cushioning properties, it is also possible to use a paper material. It is preferable to use a composite sheet of a polymer material.
The basis weight of the absorbent body 1 is preferably 15~95g / ^{m 2,} and more preferably 15~65g / ^{m 2.} The sheet thickness of the absorber 1 is preferably 0.5 to 3.5 mm, and more preferably 1.0 to 2.5 mm.

  The top sheet and the back sheet are preferably joined by heat sealing at the peripheral edge 9 (see FIG. 1). The back sheet and the absorber need not be bonded, but may be fixed with an adhesive or the like in order to prevent displacement or twist. This is the same between the top sheet and the absorber.

  In the absorbent article of this embodiment, an adhesive layer (not shown) is provided on the back surface (the surface opposite to the top sheet) of the back sheet, and a protective sheet 4 (see FIG. 1) is provided on the same surface. It is preferable that By doing so, inadvertent adhesion of adhesive and a decrease in adhesive strength are prevented, and when necessary, the protective sheet is peeled off, the adhesive layer is attached to the underwear, and the absorbent article is fixed and used. be able to.

Moreover, in the absorbent article of this invention, when not using, it is preferable to fold so that the surface sheet side may be wrapped inside. Specifically, as shown in FIG. 1, it is preferable to fold the positions of the folding lines 5 and 6 and fold both side regions of the absorbent article in the folding directions 7 and 8, respectively. In this way, by folding, the absorbent article can be carried with a length of 1/3 in the longitudinal direction (X direction), it is always carried in a compact size, and it is suitable for use when necessary Yes. Moreover, the surface sheet which contacts skin can be kept clean.
In the absorbent article of the present invention, as described above, it is preferable that the non-corrugated structure portion is in the folded position. In particular, the folded position is less likely to wrinkle and not to lose its shape even when it is expanded from the folded state. In addition, even if some wrinkles are caused by folding, the corrugated structure with thickness (height) is provided on the absorbent body, and the area is more actively abutted against the skin and cushioned. Therefore, there is an advantage of not giving a sense of incongruity due to wrinkles.

  Although the magnitude | size of the absorbent article of this invention is not specifically limited, It is preferable that it is a size suitable for a panty liner. Moreover, it is preferable that the absorbent article of the present invention has a saddle shape with a central portion as described above. Referring to FIG. 2, the width 22 of the constricted portion is not particularly limited, but is preferably 40 to 70 mm in consideration of the size of a normal panty liner. On the other hand, the width 23 of the wide portion is preferably 40 to 80 mm. The difference in width between the wide portion and the constricted portion is not particularly limited as long as the wide portion is wider than the width of the constricted portion, but the difference is preferably 0 to 40 mm.

  Here, regarding the relationship between the size of the main body of the absorbent article and the size of the absorbent body 1, the absorbent body 1 having a corrugated structure is vertically long, and its width 21 (see FIG. 2) is 20 to 40 mm. It is preferable. The width when the substantially corrugated structure portion of the absorbent body 1 is all stretched, that is, the width 44 of the absorbent body when in the stretched state as shown in FIG. 4, is the width 22 of the narrow portion of the absorbent article (see FIG. 2). It is preferable that the width is wider. Providing a corrugated structure in the absorber so as to have such a relationship is preferable in that it has a high height and can provide good cushioning properties. The width 44 when the absorbent body is extended is preferably 25 to 40 mm. This is not limited to the form of the absorbent body 1 shown in FIG. 4, but includes the form of the absorbent body 51 shown in FIG.

  The panty liner as a preferred form of the absorbent article of the present invention has been described in detail. However, the present invention can be applied to all absorbent articles, and includes, for example, a thin sanitary napkin and a sheet of a cage.

  Next, the manufacturing method of the present invention suitable for manufacturing the excellent absorbent article will be described. FIG. 6 is a perspective view schematically showing a part of the manufacturing process in the method for manufacturing an absorbent article of the present invention. As shown in the figure, first, the absorbent sheet fabric 61 is fed from the absorbent sheet fabric roll 601 and supplied between the concave and convex roll 602a and the receiving roll 602b for shaping the corrugated structure. A plurality of corrugated substantially corrugated structures are attached to the absorbent sheet through the concave-convex roll. In the structure shown in FIG. 6, three rows of substantially corrugated structures are formed by being divided into a central region and both side regions.

  Next, the absorbent sheet opposite to the above is sent to the cutting position 611 (see arrow 603) and cut along the width direction of the absorbent sheet opposite to the absorbent body 62 with the top portion of the substantially corrugated structure extending in the longitudinal direction of the absorbent body. Is done.

  Thereafter, the absorbent body is rotated by 90 ° (see arrow 608) so that the longitudinal direction of the absorbent body coincides with the feeding direction of the reverse side sheet 63 (see arrow 610). Then, in the step (d), the absorber 62 is installed on the back sheet fabric 63 sent out from the back sheet fabric roll 607 (see arrow 609).

  Then, the top sheet fabric 64 is fed from the top sheet fabric roll 604 and overlapped on the back sheet fabric on which the absorber is installed, thereby forming a composite sheet fabric 71. An absorbent body 62 is sandwiched between the composite sheet fabric 71 (see the contour auxiliary line 65), and the composite sheet fabric 71 is placed inside the contour of the absorbent article (see the cut assist line 66) by the heat rolls 605a and 605b. The peripheral edge is heat-sealed and further fed between the cutter rolls 606 a and 606 b and cut along the cut line 66. The absorbent article 67 is obtained through these steps. Further, the absorbent article 69 is preferably compacted by folding so as to cover the surface sheet side with the folding lines 68a and 68b. Although not shown in this process explanatory diagram, before folding the absorbent article, an adhesive layer is provided on the back surface (the surface opposite to the top sheet) of the absorbent article 67 to protect it so as to cover the adhesive layer. It is preferable to attach a sheet.

[Preparation of specimen]
The absorbent article (panty liner test body 1) of the present invention was produced as follows by the process shown in FIG. As the absorbent sheet opposite 61, a paper sheet opposite (a stack of two 33 g / m ² paper sheets) having a width of 115 mm and a basis weight of 66 g / m ² is provided with irregularities so as to fit with the uneven roll 602a. It was fed between the receiving rolls 602b. Next, cutting was performed at a cutting position 611 along the width direction of the absorbent sheet having the substantially corrugated structure portion to obtain a rectangular absorbent body 62 having three rows of substantially corrugated structure portions (the length of the absorber is 30 mm, The width of the absorber is 115 mm, the height of the corrugated structure is approximately 3 mm, and the width between the tops of the corrugated structures is 2 mm). At this time, the intervals between the apexes of the substantially corrugated structures in each row were made to coincide as in the form of the absorber shown in FIG. This was rotated by 90 °, and the longitudinal direction thereof was set on the reverse side of the back sheet facing the feed direction of the reverse side sheet 63 (polyethylene resin film, 70 mm width) sent out by another line. Subsequently, the top sheet 64 was fed while being overlapped so that the absorber 62 was sandwiched between the back sheet 63 and the top sheet 64 (airlaid nonwoven fabric, 70 mm width) to obtain a composite sheet 71. At this time, the saddle shape (length 140 mm in the longitudinal direction, width 47 mm of the constricted portion, width 59 mm of the wide width portion) indicated by the cutting line 66 opposite to the composite sheet is arranged so that the absorber 62 is disposed approximately at the center. The inside was heat-sealed, and further cut with a cutting line 66 to produce an absorbent article 67 (test body 1).

  For the preparation procedure of the test body 1, the absorbent body was formed such that the central corrugated structure portion at the center and the substantially corrugated structure portions on both sides deviated from each other as shown in FIG. The absorbent article (test body 2) of the present invention was produced in the same manner as above.

For the preparation procedure of the test body 1, an absorbent sheet opposite to the polymer composite sheet having a basis weight of 65 g / m ² (paper sheet [basis weight 25 g / m ² ], polymer (acrylic acid / sodium acrylate copolymer) [ An absorbent article (test body 3) of the present invention was prepared in the same manner except that the basis weight was 20 g / m ² ] and a paper sheet [three-layer sheet laminated with a basis weight of 20 g / m ² ].

  The absorbent article (test body 4) of the present invention was prepared in the same manner as the preparation procedure of the test body 1 except that the corrugated structure of the absorbent sheet was replaced with a sheet rotated by 90 ° C.

  An absorbent article for comparison (test body 5) was prepared in the same manner as in the preparation procedure of the test body 1 except that the corrugated structure was continued over the entire region in the longitudinal direction of the absorbent body and the non-corrugated structure was not provided. .

  Table 1 shows the results of testing (1) the wrinkled state, (2) the touch, and (3) the cushioning properties of the test bodies 1 to 5 as follows.

(1) “Wrinkle state” test method: When a test body that has been folded into three pieces and is in an individual packaging state is spread out, the surface sheet (including the second layer including the second layer including the crease portion in the center) “No” on the sheet), and “△” indicates that the surface sheet (including the second layer sheet) has slight irregularities in the lateral direction of the test specimen, centering on the crease. “,” And “x” are those having irregularities so as to wave.
(2) "Skin" test method: The touch when the surface of the test specimen is slid in the longitudinal direction of the test specimen in the horizontal direction with a load of 16 g / cm ² by the palm of a human hand. A smooth thing was set as “◯”, a soft and smooth feel that could not be obtained was “×”, and an intermediate one was set as “△”.
(3) “Cushioning” test method: “○” indicates that there is elasticity when the surface of the specimen is pressed vertically with a load of 16 g / cm ² by the palm of a human hand. When the pressure was pressed, the unevenness of the absorber portion was crushed and the elastic feeling was not felt, “×”, and the intermediate one was “Δ”.
In consideration of the required level when actually used, it is desirable that all items have an evaluation of Δ or more.

[Table 1]
-----------------------------------
Specimen Wrinkled state of the folding part Touch Cushioning -----------------------------------
1 ○ ○ to △ △
2 ○ ○ ○
3 ○ △ △
4 ○ ○ to △ △
5 × ○ ○
----------------------------------

  From the above results, when the absorbent article of the present invention is folded and carried and then spread, the surface state is not only wrinkled and clean, but also has a soft cushioning property when worn. It can be seen that it can be worn without any discomfort to the skin.

FIG. 1 is a perspective view schematically showing a preferred embodiment of the absorbent article of the present invention with a part cut away. FIG. 2 is a perspective view schematically showing the absorbent body shown in FIG. 1 together with the outline of the absorbent article. FIG. 3 is a cross-sectional view schematically showing an enlarged cross section taken along line III-III of the absorbent article shown in FIG. FIG. 4 is an enlarged plan view schematically showing the absorbent body shown in FIG. 3 in a stretched state. FIG. 5 is an enlarged plan view schematically showing another preferred embodiment of the absorbent body in a stretched state. FIG. 6 is a perspective view schematically showing a part of the manufacturing process in the method for manufacturing an absorbent article of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorber 2 Top sheet 3 Back sheet 4 Protective sheet 5, 6 Folding position 7, 8 Folding direction 9 Peripheral part (heat seal part)
DESCRIPTION OF SYMBOLS 10 Absorbent article 21 Width of absorbent body provided with substantially corrugated structure portion 22 Width of constricted portion of absorbent article 23 Width of wide portion of absorbent article 25 Auxiliary line indicating outline of absorbent article 28a, 28b, 28c Abbreviated Corrugated structure portion 29 Non-corrugated structure portion 31 Height of substantially corrugated structure portion 32 Top portion of substantially corrugated structure portion 33 Valley portion of substantially corrugated structure portion 34 Distance between top portions of substantially corrugated structure portion 35 Peak portion of substantially corrugated structure portion 42, 52 Auxiliary line 43 indicating the relationship of the corrugated shape between the substantially corrugated structures 43 The top spacing 44 The width of the absorber during expansion 47 The mountain fold line 48 The valley fold line 53 The half top spacing 401 Left side region 403 Central region 405 Right side region 402 404 Area for non-corrugated structure (folding area)
61 Absorbing sheet anti-sheet 62 Absorber 63 Back sheet anti-sheet 64 Anti-surface sheet anti-65 Auxiliary line indicating absorber outline 66 Auxiliary line indicating cutting line 67 Absorbent article 68a, 68b Folding position 69 Absorbent article after folding 71 Composite sheet Anti-601 Absorbing sheet anti-roll 602a Concavity and convexity roll 602b Receiving roll 603 Absorbing sheet anti-feed direction 604 Top sheet anti-roll 605a, 605b Heat roll 606a, 606b Cutter roll 607 Back sheet anti-roll 608 90 degree rotation of absorber An arrow 609 indicates an arrow indicating installation of the absorber on the back sheet 610 An arrow indicating a feeding direction of the back sheet 611 Cutting position opposite to the absorbent sheet

Claims (7)

An absorbent article provided with an absorbent body between the top sheet and the back sheet,
A substantially corrugated structure portion having a plurality of rows of wavy shapes extending along the longitudinal direction of the absorbent body at least in the central liquid absorption region in the longitudinal direction of the absorbent body, and substantially at both longitudinal ends of the substantially corrugated structure section An absorbent article comprising a non-corrugated structure portion having no height.   The absorbent article according to claim 1, wherein the absorbent article can be refracted in the non-corrugated structure portion.   The said substantially corrugated structure part is provided with two or more through the non-corrugated structure part in the longitudinal direction of the said absorber, The top part of the peak part of each substantially corrugated structure part is continued in a longitudinal direction. The absorbent article as described.   The substantially corrugated structure portion is divided into the longitudinal direction of the absorber, and a plurality of the corrugated structure portions are provided so that the peak portion of the substantially corrugated structure portion is connected to the valley portion of the substantially corrugated structure portion adjacent in the longitudinal direction. The absorptive article according to claim 1 or 2 characterized by being shifted.   The absorbent article according to any one of claims 1 to 4, wherein the cross-sectional shape in the width direction of the peak portion of the substantially corrugated structure portion is a shape whose height gradually decreases from the peak portion to the valley portion. .   The absorbent article according to any one of claims 1 to 5, wherein the absorbent article has a saddle shape with a neck at the center, and the width when the absorbent body is stretched is wider than the width of the neck portion. Absorbent article. (A) a step of shaping the absorbent sheet so as to provide a substantially corrugated structure having a ridge line extending in the width direction of the absorbent sheet;
(B) cutting the absorbent sheet opposite along the width direction to form an absorbent body in which the top of the substantially corrugated structure portion extends in the longitudinal direction;
(C) rotating the absorbent body by 90 ° to match the longitudinal direction of the absorbent body with the feeding direction of the reverse side of the back sheet;
(D) a step of installing the absorber on the back side of the back sheet; and (e) sending a top sheet side to the back side of the back sheet on which the absorber is installed to form a composite sheet counter, The manufacturing method of the absorbent article of any one of Claims 1-6 which has the process sent in between heat rolls and between cutter rolls.

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