TW201929817A - Absorbent article body and absorbent article - Google Patents

Abstract

In order to enhance the contact of an absorbent article body, in which the both faces of an absorbent material are overlaid with sheets, and also enhance the fitability of the wearer by folding the absorbent article body in the width direction when the absorbent article is worn by the wearer, an absorbent article body includes a front part 1A, a crotch part 1B, and a back part 1C arranged in this sequence along a longitudinal direction, is provided to an absorbent article body being arranged such that the longitudinal direction lies along the front to the rear of the crotch part of the wearer, and is formed by overlaying the both face of the absorbent material 12 with the sheets 11, 13, and 14, wherein the absorbent article body further includes a guiding structure 20 that extends in the longitudinal direction covering the crotch part of the wearer and guides a section of the absorbent article body to be folded to have a W-shaped section that projects the center part of the section towards a skin side when being worn, and when the both ends in the width direction of the absorbent article body is compressed to 4*T*1.25 mm against the thickness T of the absorbent article body to fold the absorbent article body into a W shape, the reaction force of the absorbent article body is 2.0 N or less.

Description

 Absorbent article body and absorbent article  

The present invention relates to an absorbent article body and an absorbent article.

An absorbent article (so-called disposable diaper) has an absorbent body that is attached to the wearer and that is detachably attached to the wearer. Further, there is also a case in which an absorbent body is incorporated in the wearable body and the absorbent body is detachably attached.

As such an absorbent article, it is disclosed that a plurality of slits are provided along the longitudinal direction of the absorbent body, and are bent at the peripheral portion of each slit at the time of wearing, and the center in the width direction is protruded toward the skin surface side to be deformed in a W shape. The method constituting person (see Patent Document 1).

Further, a configuration is disclosed in which a guide line for guiding the skin toward the skin surface side is provided, and a portion including no guide line and a soft portion (JIS L 1085) including a portion of the guide line are defined. The limit value is such that it is easily bent along the guide line (see Patent Document 2).

 [Previous Technical Literature]    [Patent Literature]  

[Patent Document 1] Japanese Patent No. 5486348

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2016-189852

According to the technique of Patent Document 2, by setting the lower limit of the softness degree defined in JIS L 1085, it is easy to bend along the guide line without bending outside the guide line, but it is numerically specified. The part of the bending line of the absorbent article is required to be set with a more rigid parameter than the softness. Moreover, the absorbent body bent at a predetermined portion improves the adhesion to the wearer's skin, but on the other hand, it also has a feeling of pressure on the wearer. Therefore, it is also necessary to bend the wearer to improve the adhesion. Sex and give a good sense of wear.

The present invention has been made in view of such a problem, and an object of the invention is to provide an absorbent article main body and an absorbent article which are capable of bending an absorbent body in a width direction during wear to improve adhesion and impart a good wearing feeling.

(1) Absorbent article of the present invention The system is provided in an absorbent article having mutually orthogonal longitudinal directions, width directions, and thickness directions, and is disposed on both surfaces of the absorbent body. The most important feature is that: An rib is formed in the longitudinal direction of the center of the absorbent article main body so as to be bent toward the skin surface side, and further ribs are formed in the longitudinal direction on both sides of the center in the width direction to face the non-skin surface. When the side is protruded, the reaction force of the absorbent article body is 2.0 N or less with respect to the thickness T mm of the absorbent article body being compressed to 4 × T × 1.25 mm.

(2) The absorbent body preferably has two groove-shaped portions extending in the longitudinal direction, and the groove-like portion is formed with ribs in the longitudinal direction on both sides in the center in the width direction to protrude toward the non-skin side. The way it bends.

(3) Another absorbent article of the present invention is provided in an absorbent article in which a sheet is disposed on both sides of the absorbent body, and the absorbent article is provided with a front piece, a lower part, and a rear in the longitudinal direction. The body piece is disposed in a longitudinal direction along a squatting direction of the wearer, and the absorbent article body is characterized by having a guiding structure that is guided in such a manner as to include the above-mentioned wearer The lower position extends in the longitudinal direction, and is a bent shape having a cross-sectional shape having a W-shaped cross section in which the center portion protrudes toward the skin surface side at the time of wearing, and the W-shaped bending shape is deformed. When the both ends of the width direction are compressed to 4 × T × 1.25 mm with respect to the cross-sectional thickness T mm of the absorbent article main body, the reaction force of the absorbent article body is 2.0 N or less.

(4) Preferably, the guiding structure includes one of the pair of groove-shaped portions extending in the longitudinal direction.

(5) The reaction force of the absorbent article body is preferably 1.5 N or less.

(6) The reaction force of the above absorbent article body is preferably 1.0 N or more.

(7) Another absorbent article of the present invention is characterized in that it is provided on an absorbent article having a longitudinal direction, a width direction, and a thickness direction which are orthogonal to each other, and a sheet is disposed on both surfaces of the absorbent body, and is characterized in that The center of the absorbent article main body in the width direction forms an edge in the longitudinal direction, and is bent so as to protrude toward the skin surface side, and is compressed to 2 × T × 1.25 mm with respect to the thickness T mm of the absorbent article body. The reaction force of the absorbent article body is 2.0 N or less.

(8) The absorbent article of the present invention is characterized in that it has a front body piece, a crotch lower part, and a back body piece in the longitudinal direction, and has a wearable body which is placed in the longitudinal direction along the front of the wearer. The absorbent article body according to any one of (1) to (7), wherein the absorbent article body is disposed in the longitudinal direction of the wearer in a front-rear direction.

According to the present invention, the reaction force of the absorbent article body when the both ends in the width direction are compressed to the cross-sectional thickness T mm of the absorbent article main body to 4 × T × 1.25 mm in a W-shaped bending deformation is Since it is 2.0 N or less, the absorber can be bent in the width direction at the time of wearing to improve the adhesiveness and give a good wearing feeling.

1‧‧‧A paper diaper (absorbent article) as a wearable body for absorbent articles

1A‧‧‧Predecessor

1B‧‧‧胯 lower part

1C‧‧‧Back body

The edge of the outer side of the width direction of the 1S‧‧‧ paper diaper (absorbent article) 1

2‧‧‧Fixed tape

3‧‧‧Pre-Patch

10‧‧‧Side sheet (skin side sheet)

10S‧‧‧Inside extension of the side sheet 10

11‧‧‧Top sheet (skin side sheet)

12‧‧‧ pads (absorbers)

12'‧‧‧ samples

13‧‧‧The bottom sheet (the first non-skin side sheet)

14‧‧‧ Covering sheet (2nd non-skin side sheet)

20‧‧‧ embossed part (groove)

20'‧‧‧ slot

31‧‧‧ leg wrinkles

31A‧‧‧The formation of leg folds (leg folds)

32‧‧‧ as the anti-displacement wrinkles of the inner wrinkles (supporting wrinkles)

32A‧‧‧ as the formation area of the anti-displacement wrinkles of the inner wrinkles (anti-shift wrinkle area)

33‧‧‧Three-dimensional wrinkles

33A‧‧‧Formation of three-dimensional wrinkles (three-dimensional wrinkle area)

34‧‧‧ Waist wrinkles

41‧‧‧1st elastic member

41a, 41b‧‧‧1st linear elastomer

42‧‧‧2nd elastic member

42a, 42b, 42c‧‧‧2nd linear elastomer

43‧‧‧3rd elastic member

43a, 43b‧‧‧3rd linear elastomer

51, 52‧‧‧V Department

100‧‧‧ Wearable body

120‧‧‧Absorbent article body (diaper body)

C‧‧‧ center line of width (center of width direction)

C ₃ ‧‧‧Center line in the width direction

C ₁₀ ‧‧‧Center line in the width direction

C ₁₁ ‧‧‧Center line in the width direction

C ₁₂ ‧‧‧Center line in the width direction

C ₁₃ ‧‧‧Center line in the width direction

C ₁₄ ‧‧‧Center line in the width direction

La‧‧‧width

Lb‧‧‧Length

Lc‧‧‧ distance

Ls‧‧‧Distance

T‧‧‧The thickness of the body of the absorbent article

Fig. 1 is a plan view showing a disposable diaper (absorbent article) in an unfolded state.

Figure 2 is a perspective view of the paper diaper of Figure 1.

Fig. 3 is a perspective view showing the paper diaper of Fig. 1 exploded.

Figure 4 is a cross-sectional view showing the main part of the paper diaper of Figure 1 (a-α sectional view of Figure 1).

Fig. 5 is a cross-sectional view showing a portion in which a groove portion is placed in a worn state of the disposable diaper.

6A and 6B are diagrams for explaining a test for obtaining values relating to the characteristics of the reaction force of the absorber, and Fig. 6B is a front view of the test sample, and Fig. 6A is a side showing the state of the test sample. view.

Hereinafter, an absorbent article as an embodiment will be described with reference to the drawings. Further, the embodiments shown below are merely illustrative, and are not intended to be excluded from the various changes or techniques that are not explicitly described in the following embodiments. The various configurations of the present embodiment can be variously modified without departing from the spirit and scope of the invention. Further, the selection may be made as needed, or may be combined as appropriate.

The absorbent article of the present embodiment is a sanitary article that is worn by a wearer to absorb liquid such as urine or menstrual blood. Examples of the absorbent article include a belt type or a pants type diaper (so-called "disposable diaper"), a urine pad, a menstrual sanitary napkin, a sanitary pad, and the like. In the following embodiments, a belt type disposable diaper is exemplified as an absorbent article.

In an absorbent article such as a "diaper (or disposable diaper)", an absorbent body for absorbing liquid is provided in a wearable body for wearing the wearer, but in the present embodiment, it is exemplified in the wearable body. There are absorbers and can be used to attach and detach other absorbent bodies to the wearer.

In this manner, in the absorbent article, the wearable body and the absorbent body are required, and the absorbent article is composed of the wearable body and the absorbent body. In the present embodiment, the absorbent body is removed from the absorbent article to be a wearable body.

Further, in the present embodiment, a male diaper for men is exemplified.

In the present embodiment, the diaper is a longitudinal direction in which the front body is placed facing the wearer's abdomen, and the front body is placed opposite to the back and then the body is coupled. The lower part disposed under the wearer's armpit (disposed with the crotch) is located between the front piece (one side in the longitudinal direction) and the back piece (the other side in the longitudinal direction) (the center in the longitudinal direction) . In addition, when the disposable diaper is worn by the wearer (hereinafter referred to as "wearing state"), the side of the wearer's skin (the inner side in the worn state) is set to the skin side, and the skin side is The opposite side (outside of the worn state) is set to the non-skin side. Further, the direction in which the skin surface side and the non-skin surface side are connected is set to the thickness direction, and the direction orthogonal to either the longitudinal direction and the thickness direction is set to be the width direction. In addition, it is set to observe from the thickness direction as a plan view.

 [I. One embodiment]    [1. Paper diapers]    [1-1. Basic composition]  

First, the basic configuration of the disposable diaper 1 will be described with reference to Figs. 1 to 3 . The disposable diaper 1 is formed bilaterally symmetrically with respect to the center line C in the width direction. In addition, in FIG. 3, the symbol indicating the center line of the width direction of each member is attached to the symbol "C" in the symbolic form of each member.

The disposable diaper 1 is roughly divided into three regions of the front body piece 1A, the crotch portion 1B, and the back body piece 1C in the longitudinal direction.

In the disposable diaper 1, the back panel 1C is provided with a fixing tape 2 which protrudes in the width direction, and the front patch 3 is provided on the most non-skin side of the front body panel 1A (indicated by a broken line in FIG. 1) . The disposable diaper 1 is worn by the wearer by attaching the fixing tape 2 to the front patch 3.

Further, the width dimension of the crotch portion 1B is set to be slightly larger than the size between the root portions of the legs of the ordinary wearer. Therefore, in the worn state, the lower portion 1B that is sandwiched in the width direction is in a state of being bent. In this state, the crease extends in the longitudinal direction.

Next, the sheet constituting the disposable diaper 1 will be described with reference to Figs. 1 to 3 .

The disposable diaper 1 is provided with a wearable body 100 and an absorbent body 12 (shown by thick broken lines in Fig. 1) which extend over the longitudinal direction across the front piece 1A, the lower part 1B and the back piece 1C. In FIGS. 1 to 3, the width of the lower portion 1B in the width direction is smaller than that of the front piece 1A and the back piece 1C, that is, the front view of the lower portion 1B is recessed in the width direction. Body 12. However, the absorbent body 12 having a fixed width in the width direction can also be used. Further, as described above, the absorbent body 12 is removed from the disposable diaper 1 as the wearing body 100.

The absorbent body 12 is a member that absorbs and retains the liquid drained from the wearer. Since the absorber 12 is a mat shape in this example, it is referred to as "pad 12" in the following description, but the shape of the absorber is not limited to a mat shape, and various shapes known in the art can be employed. .

For example, a superabsorbent resin (so-called SAP (Superabsorbent Polymer), also known as superabsorbent polymer or superabsorbent polymer, is mixed with pulverized or defibrated pulp (so-called "small fluff pulp"). The core is wrapped (coated) with a coated sheet (core wrap) and used for the mat 12. Here, the cover sheet is made of cotton paper.

On the mat 12, various sheets described below are laminated on the skin side and the non-skin side.

The top sheet 11 is laminated as one of the skin side sheets on the skin surface side of the mat 12 so as to overlap the wide areas other than the side edges (side portions) of the mat 12 except the width direction. The top sheet 11 can also cover the entire area of the mat 12.

The top sheet 11 is placed on the most skin side of the disposable diaper 1. The top sheet 11 has a property of permeating a liquid (liquid permeability) in order to absorb the liquid excreted from the wearer to the pad 12. Further, the top sheet 11 covers the skin side of the pad 12.

Further, the side sheet 10 is provided as one of the skin surface side sheets in each of the top sheet 11 and the mat 12 in the width direction side.

Similarly to the top sheet 11, the side sheet 10 is placed on the most skin side of the disposable diaper 1. The side sheet 10 has a property (hydrophobicity) which is hard to permeate the liquid in order to prevent leakage of the discharged liquid.

On the non-skin side of the mat 12, an underlayer sheet (first non-skin side sheet) 13 is laminated on the side close to the mat 12 as one of the non-skin side sheets. A cover sheet (second non-skin side sheet) 14 is laminated on the non-skin side of the back sheet 13 (on the side away from the mat 12) as one of the non-skin side sheets.

The back sheet 13 has liquid impermeability in order to prevent liquid from leaking from the mat 12. The back sheet 13 is covered with the mat 12 from the non-skin side. For example, a thermoplastic resin sheet such as polyethylene (PE) or polypropylene (PP) is used for the back sheet 13 .

As shown in FIGS. 1 to 3, the cover sheet 14 is disposed on the most non-skin side of the lower portion 1B and the back piece 1C of the disposable diaper 1. The cover sheet 14 is provided to reinforce the underlayer sheet 13 and to enhance the tactile sensation (for example, hand feeling), and the underlayer sheet 13 is covered from the non-skin side.

Furthermore, the cover sheet 14 is not limited to a single layer structure, and may have a multilayer structure having an inner cover sheet and an outer cover sheet.

Further, the mat 12 is disposed in a portion of the disposable diaper 1 except for the both edge portions 1S on the outer side in the width direction. In other words, the pad 12 and the top sheet 11 are not disposed on the both edge portions 1S on the outer side in the width direction of the disposable diaper 1, and only the side sheet 10, the back sheet 13, and the cover sheet 14 are overlapped. Further, the outermost sheet member 13 is not disposed on the outermost side of the both edge portions 1S on the outer side in the width direction, and only the side sheet member 10 and the cover sheet member 14 are disposed to overlap each other.

In this manner, the top sheet 11 is placed on the skin surface side of the mat 12, and the back sheet 13 and the cover sheet 14 are disposed on the non-skin side of the mat 12, that is, the sheet 11 is disposed on both sides of the mat 12, The portion of the main structure constituting the disposable diaper (absorbent article) 1 of 13, 14 is a disposable diaper main body (absorbent article main body) 120.

In addition, the front view shapes of the edge portions 10, the back sheet 13 and the cover sheet 14 in the width direction are formed in a concave shape in the lower portion 1B in the same manner as the edge portions in the width direction of the mat 12. . However, the mat 12 or the sheets 10, 13, 14 are not limited to such a concave shape, and may be rectangular. The side sheet 10 and the both edges of the cover sheet 14 in the width direction extend to the outermost side to constitute both edge portions in the width direction of the disposable diaper 1, and the top sheet 11 is disposed so as to overlap the mat 12 in the thickness direction. Both edge portions in the width direction are located on the inner side of both edge portions in the width direction of the lower layer sheet 13.

The front patch 3 is attached to the non-skin side of the cover sheet 14.

The front patch 3 is joined to the fixing tape 2 by a fastening mechanism, and the fixing tape 2 is provided at each of both end portions in the width direction of the back body piece 1C. In FIGS. 1 to 3, two fixing bands 2 are provided on both sides in the width direction of the back body piece 1C. However, at least one fixing tape 2 is provided on each of both sides in the width direction, and the number is not limited. Each of the fixing belts 2 extends from the outer edge portions 1S of the back body piece 1C to the outer side in the width direction. Further, the front patch is not essential, and for example, the material for fastening the fastening tape for the cover sheet 14 may be used.

In the present embodiment, as a fastening means for joining the fixing tape 2 to the front patch 3 and fixing both side portions of the back body piece 1C to both side portions of the front piece 1A, a hook member (male member) is used. A surface fastener attached to a mechanical joint of a ring material (female member).

The planar fastener is composed of a combination of a hook material having a large number of protrusions (e.g., a hook shape or a mushroom shape) formed on the surface thereof and a ring material having a ring-shaped fiber disposed on the surface. That is, the hook material is provided in either of the fixing tape 2 and the front patch 3, and the ring material is provided in the other. By using the planar fastener, the hook material and the loop material can be peeled off and fixed, and can be repeatedly used.

However, an adhesive or an adhesive tape or the like can also be used for the fastening mechanism.

 [1-2. Detailed composition]  

Next, the detailed configuration of the disposable diaper 1 will be described with reference to Figs. 1 to 3 .

Here, a structure for bending the crotch portion 1B into a predetermined shape and holding it (hereinafter referred to as a "bending holding structure") will be described. Furthermore, the irregular bending or twisting of the crotch portion 1B reduces the comfort of the wearer. Therefore, in order to ensure the comfort of the wearer by bending the crotch portion 1B into a predetermined shape, the diaper 1 is set to bend. Fold the structure.

As the bending holding structure, an embossed portion 20 (a groove portion, also referred to simply as embossing) is provided as a guiding structure, and the guiding structure guides the shape of the crotch portion 1B to have a W-shaped cross-sectional shape. Further, anti-displacement wrinkles (support wrinkles) 32 are provided which are used to maintain the shape of the lower portion 1B which is bent into a predetermined shape. Further, the pad 12 is provided with a configuration for reliably bending the crotch portion 1B to a predetermined shape by the embossed portion 20.

The disposable diaper 1 is also provided with leg gathers 31 and three-dimensional gathers 33 together with the anti-shift wrinkles 32. In the present embodiment, the wrinkles 31, 32, and 33 are all disposed in the longitudinal direction symmetrically with respect to the center line C in the width direction. The anti-shift wrinkles 32 are respectively disposed to be more inclined toward the center line C (the inner side) in the width direction than the leg gathers 31, and are therefore also referred to as inner wrinkles.

Further, in the disposable diaper 1, the regions in which the leg gathers 31, the anti-displacement wrinkles 32, and the three-dimensional gathers 33 are respectively formed are referred to as a leg gather region 31A, an anti-shift wrinkle region 32A, and a three-dimensional gather. Area 33A. Each of the wrinkle regions 31A, 32A, and 33A is defined in the width direction and the longitudinal direction of the disposable diaper 1 respectively.

Further, as shown in Fig. 2, waist gathers 34 are provided in the width direction between the fixing bands 2, 2 on both side portions of the back body piece 1C.

 (embossed part)  

The embossed portion 20 is a portion in which at least one pair (two) of grooves are formed in the crotch portion 1B extending in the longitudinal direction. In the present embodiment, a pair of embossed portions 20 are provided. Further, the embossed portion 20 is not provided in the front body piece 1A and the back body piece 1C.

Here, the embossed portion 20 is provided on the top sheet 11 and the mat 12. In other words, the embossed portion 20 is placed on the skin surface side of the disposable diaper 1. Further, the embossed portion 20 may be provided at least on the mat 12 or may not be provided on the top sheet 11.

The embossed portion 20 can be recessed (embossed) by partially pressing (rolling) the mat 12 on which at least the top sheet 11 is laminated. In this case, the pad 12 provided with the embossed portion 20 is in a state of being pressed (compacted).

Further, by providing a water spraying step for spraying at least the embossing forming portion before the embossing, the fibers of the pulp constituting the mat 12 are easily temporarily adhered to each other due to the viscosity or surface tension of the water, and it is easy to add by the addition. Press forming forms embossing. The water spray step is carried out by spraying the core with a sprayer before the core of the mat 12 is clamped to the lower tissue and the upper tissue. Thereafter, the embossed portion (groove) 20 is formed by embossing the desired portion by the pad 12 formed by sandwiching the core with the core.

As shown in FIG. 1 to FIG. 3, in the present embodiment, as an example of the embossed portion 20, a straight line which is disposed bilaterally symmetrically with respect to the center line C in the width direction and which is parallel to each other and which is formed as a pair is exemplified. The embossed portion 20 of the shape. However, the embossed portion 20 may be embossed (line embossed) extending linearly in the longitudinal direction, and is not limited to linear embossing, and may be wavy line embossing or arcing. Other curved lines are embossed.

Further, in the present embodiment, each of the left and right embossed portions 20 is parallel to the center line C, but each of the left and right embossed portions 20 may have a shape that is distant or close to one from the longitudinal direction toward the other. Further, the embossed portion 20 may be provided one by one as in the present embodiment, but may be provided in each of the right and left sides, and the number of each is not limited. Further, the embossed portion 20 may be provided in addition to the symmetrical embossed portion 20, or three or more embossed portions 20 may be provided.

 (leg folds)  

The leg gathers 31 are provided to improve the followability of the wearer's legs. The leg gathers 31 are provided in a region (leg gather region) 31A of the both edge portions 1S on the outer side in the width direction of the disposable diaper 1 in the width direction. The leg gathers 31 are provided in the longitudinal direction so as to extend in the longitudinal direction with the span and the entire lower portion 1B, the portion of the front piece 1A that is biased toward the lower portion 1B, and the portion of the back piece 1C that is biased toward the lower portion 1B. Further, in the crotch region 31A, the lower portion 1B is provided in a region where the pad 12 is not disposed on the outer edge portion 1S of the outer side in the width direction of the disposable diaper 1, and the front body piece 1A and the back body piece 1C are provided on the pad. 12 outer edge portion or region adjacent to the pad 12.

The leg gathers 31 are formed by shrinking and wrinkling the elastic members (first elastic members) 41 as the first expansion and contraction means that exerts a contracting force in the longitudinal direction in the longitudinal direction. The first elastic member 41 is composed of two linear elastic bodies (first linear elastic bodies) 41a and 41b as indicated by broken lines in Fig. 1 . The first elastic members 41 are disposed on the both edge portions 1S of the disposable diaper 1 in the width direction, and are disposed on the outer edge portion of the pad 12 or adjacent to the pad 12 in the lower body piece 1A and the back body piece 1C. region. Further, the first elastic member 41 is provided so as to extend in the longitudinal direction across the entire area of the lower portion 1B, the portion of the front piece 1A that is biased toward the lower portion 1B, and the portion of the back piece 1C that is biased toward the lower portion 1B.

 (anti-shift wrinkle)  

The anti-shift wrinkle 32 is provided to lift the pad 12 to the skin surface side in a worn state and to prevent the pad 12 from being displaced. The anti-shift wrinkle 32 is provided on the inner side in the width direction of the leg gathers 31 in the width direction, and is located on the outer side in the width direction of the embossed portion 20 and in the vicinity of both edges in the width direction of the mat 12 (the deflecting edge portion) The area (the anti-shift wrinkle area or the inner wrinkle area) 32A is disposed correspondingly. The anti-shift wrinkle region 32A is formed in the longitudinal direction by the lower portion 1B as the center portion of the front body piece 1A and the portion of the back body piece 1C which is biased toward the lower portion 1B. Extended mode setting.

Further, the anti-shift wrinkle region 32A is disposed at a position overlapping the pad 12 in the thickness direction (in plan view) in the region of the crotch portion 1B. Here, the longitudinal direction position of the displacement preventing pleats 32 is set inside the longitudinal direction region of the mat 12. It is not necessary to set the longitudinal direction position of the anti-shift wrinkle 32 in the region of the pad 12 as described above. However, it is preferable that all of the anti-shift wrinkles 32 are disposed at positions overlapping the pad 12. In this case, the anti-shift wrinkles 32 are not covered to the entire lengthwise direction of the mat 12, but the anti-displacement wrinkles 32 are applied to the mat 12 without waste. Further, the arrangement of the displacement preventing wrinkles 32 is not limited thereto, and at least a part of the displacement preventing wrinkles 32 may be disposed at a position overlapping the pad 12.

The anti-shift wrinkle 32 is also formed by shrinking the elastic member (second elastic member) 42 as a second expansion/contraction means that exerts a contracting force in the longitudinal direction in the longitudinal direction. As shown by a broken line in FIG. 1, the second elastic member 42 is composed of three linear elastic bodies (second linear elastic bodies) 42a to 42c each arranged in the longitudinal direction.

The second elastic member 42 corresponds to the inner side in the width direction of the first elastic member 41 of the leg gathers 31 in the width direction, and the outer side in the width direction of the embossed portion 20 and the vicinity of both edges in the width direction of the mat 12 in the width direction. Mode configuration. The second elastic member 42 has its effective range (the range in which the elastic force is exerted) in the longitudinal direction of the crotch portion 1B, and the portion of the front body 1A that is biased toward the crotch portion 1B and the back body 1C. The lower portion 1B is provided to extend in the longitudinal direction.

Needless to say, the effective range of the second elastic member 42 in the longitudinal direction also corresponds to the displacement preventing wrinkles 32, and the effective range of the second elastic member 42 in the longitudinal direction is located inside the longitudinal direction range of the mat 12. The effective range of the second elastic member 42 is not necessarily located inside the longitudinal direction of the mat 12, but it is preferable that the effective range of the second elastic member 42 is entirely disposed at a position overlapping the mat 12. In this case, the second elastic member 42 is not covered by the entire lengthwise direction of the mat 12, but the second elastic member 42 acts on the mat 12 without waste. Further, the arrangement of the effective range of the second elastic member 42 is not limited thereto, and at least a part of the effective range of the second elastic member 42 may be disposed at a position overlapping the pad 12.

 (stereo wrinkles)  

The three-dimensional wrinkles 33 are provided in order to prevent the discharged liquid from leaking to the outer side in the width direction. The base end of the three-dimensional wrinkle 33 is provided in the width direction in a region (stereo-pleated region) 33A which is disposed on the outer side in the width direction of the anti-shift wrinkle 32 and which is closer to the leg gathers 31 Inside the width direction. The three-dimensional wrinkle region 33A is provided in the longitudinal direction so as to extend in the longitudinal direction over almost the entire length of the end portion of the disposable diaper 1 (the end portion is a fixing portion without a telescopic function).

As shown in FIGS. 4 and 5, the inside of the width direction of the side sheet 10 has an inner extending portion 10S that can be provided to extend from the edge portion of the top sheet 11 of the joining side sheet 10 to the skin surface side. The inner extending portion 10S is formed over the entire length of the side sheet 10, and the inner extending portion 10S forms a three-dimensional gather 33. The base end of the three-dimensional wrinkle 33 corresponds to the edge portion of the proximal end side of the inner extending portion 10S, that is, the portion from which the inner extending portion 10S is separated from the top sheet 11.

The three-dimensional gathers 33 are formed by shrinking and wrinkling the elastic members (third elastic members) 43 as the third expansion and contraction means that exerts a contracting force in the longitudinal direction in the longitudinal direction. As shown in FIG. 4 to FIG. 6 (FIG. 6A and FIG. 6B), the edge portion on the front end side of the inner extending portion 10S has a double structure in which the back side is folded back, and the third elastic member 43 is disposed inside the double structure portion. .

The third elastic member 43 is composed of two linear elastic bodies (third linear elastic bodies) 43a and 43b as shown by a broken line in FIG. 1 and a cross section in FIGS. 4 and 5. The third elastic member 43 is disposed in the longitudinal direction so as to extend in the longitudinal direction over substantially the entire length of the end portion of the disposable diaper 1 excluding the longitudinal direction (the end portion has no telescopic function as the fixing portion).

Moreover, the space between the right and left three-dimensional wrinkles 33 is closer to the skin surface side than the top sheet 11, and another pad (not shown) can be added and worn.

 <Characteristics of each wrinkle>  

The leg gathers 31, the displacement preventing wrinkles 32, and the three-dimensional gathers 33 are all formed by the elastic members 41, 42, 43 shrinking in the longitudinal direction and wrinkling. The elastic members 41, 42, and 43 are continuously joined to each other in an extended state between the sheets to be mounted. The elastic members 41, 42, and 43 exert a contracting force.

In the present embodiment, each of the elastic members 41, 42 and 43 is composed of a plurality of linear elastic bodies 41a, 41b, 42a to 42c, 43a, 43b. However, as each linear elastic body, for example, natural rubber or Rubber line of synthetic rubber (linear rubber) or linear stretch film. The elastic members 41, 42, and 43 composed of the linear elastic bodies 41a, 41b, 42a to 42c, 43a, and 43b are disposed between the layers constituting the sheets of the disposable diaper 1, respectively.

That is, the first elastic member 41 of the leg gathers 31 is disposed between the side sheets 10 and the layers of the back sheet 13 at the crotch portion 1B. Further, the leg gathers 31 are disposed between the side sheets 10 and the back sheet 13 respectively before the main end is the fixed end, but the front piece 1A and the back piece 1C may be disposed on the front piece 1A and the back piece 1C. The side sheet 10 is interposed between the layers of the cover sheet 14 or the layers of the back sheet 13 and the cover sheet 14.

The second elastic member 42 of the displacement preventing wrinkle 32 is disposed between the layers of the back sheet 13 and the cover sheet 14 in its entirety. The effective range of the second elastic member 42 of the displacement preventing wrinkle 32 is entirely disposed at a position overlapping the pad 12, and therefore, when the linear elastic bodies 42a to 42c of the second elastic member 42 are stretched and deformed, the linear elastic body is used. Friction occurs between 42a~42c and the sheet in contact with it. When the linear elastic bodies 42a to 42c are in direct contact with the pad 12, friction occurs between the linear elastic bodies 42a to 42c and the pad 12, and the pad 12 is broken or deformed to lower the absorbability of the pad 12. In particular, when the cover sheet is made of cotton paper, the linear elastic bodies 42a to 42c are rubbed against the tissue, and the tissue is thus easily broken.

On the other hand, by arranging the linear elastic bodies 42a to 42c of the second elastic member 42 between the layers of the back sheet 13 and the cover sheet 14, contact between the linear elastic bodies 42a to 42c and the mat 12 can be avoided and passed. The back sheet 13 transmits the contraction force of the second elastic member 42 to the pad 12, thereby lifting the pad 12 toward the skin surface by preventing the displacement of the pad 12 without causing cracking or deformation of the pad 12. Support is provided and the pad 12 is not offset.

Further, as shown in FIGS. 1 to 5, the first elastic members 41 of the leg gathers 31 are provided with two linear elastic bodies 41a and 41b, respectively, and the second elastic members 42 of the displacement preventing wrinkles 32 are provided with three. The linear elastic bodies 42a to 42c and the third elastic members 43 of the three-dimensional gathers 33 are provided with two linear elastic bodies 43a and 43b, but the elastic members 41, 42, 43 or the respective linear elastic bodies 41a, 41b, 42a to 42c 43,a, 43b apply the elastic properties that meet the requirements for each of the wrinkles 31, 32, and 33.

The first elastic member 41 is applied to have a lower modulus of elasticity than the second elastic member 42 between the first elastic member 41 of the leg gather 31 and the second elastic member 42 of the displacement preventing wrinkle 32. In other words, the elastic member 41 on the outer side in the width direction is formed to have a lower elastic modulus than the elastic member 42 on the inner side in the width direction.

In other words, when the elastic member 42 on the inner side in the width direction is provided, the elastic member 41 on the outer side in the width direction exhibits an elastic force (stretching force) which is weak, that is, relaxed, when the same elongation (elongation) is applied.

In addition, the "elasticity rate" as used herein mainly refers to an elastic modulus or an elastic constant of stretching in the longitudinal direction of the disposable diaper 1, and corresponds to the Young's modulus E shown below, and may correspond to the spring constant k.

E=σ/ε

σ: stress due to stretching of the elastic member

ε: strain due to stretching of the elastic member

Therefore, when the Young's modulus (elasticity) of the first elastic member 41 is E1 and the Young's modulus (elasticity) of the second elastic member 42 is E2, E1 and E2 become the following formula (A). relationship.

E1<E2...(A)

 [2. Paper diaper in wearable state]  

Next, the lower portion 1B of the worn state will be described with reference to Fig. 5 .

In the worn state, the crotch portion 1B is in a state of being bent into a predetermined shape. Specifically, in the portion where the embossed portion 20 is disposed, the cross section of the lower portion 1B in the width direction is as shown in FIG. 5, and the embossed portions 20 are swelled toward the skin surface side with the center in the width direction as the apex, and further, embossed The outer side of the portion 20 is also raised toward the skin surface side, and therefore, it is bent into a predetermined shape of a "W" shape. The portion constituting the "W" is compared to two V words arranged side by side, and one V portion and the other V portion are referred to as V portions 51, 52. Further, the position of the crease is referred to as a convex fold if it is on the side of the skin surface, and is referred to as a concave fold on the side of the non-skin surface.

In this worn state, the embossed portion 20 becomes a crease and guides the concave portion of the crotch portion 1B. Specifically, the two concave portions are guided by folding the lower portion 1B with the two embossed portions 20 as creases. Further, the embossed portion 20 is provided at a portion corresponding to a corner portion of each of the V-shaped portions 51 and 52. At this time, in the lower portion 1B of the crotch, the intermediate portions in the width direction of the two embossed portions 20 are convexly folded into an inverted V shape, and the center in the width direction is a crease.

The anti-displacement wrinkles 32 formed by the second elastic members 42 are formed on the outer side in the width direction of each of the V-shaped portions 51 and 52. The pad 12 is contracted in the longitudinal direction by the anti-displacement wrinkles 32 which are contracted by the second elastic member 42 to lift the crotch portion 1B toward the skin surface side as a whole.

However, the pad 12 of the present embodiment is deformed into a W-shaped bent shape by the embossed portion 20 as described above, and the width direction of the disposable diaper main body (absorbent article main body) 120 having the pad 12 as the main body at this time. The rigidity is set to the following characteristics.

That is, the sample 12' in which the disposable diaper main body 120 is cut into a predetermined shape as shown in FIG. 6A is prepared. The sample 12' is a material that cuts the same material as the disposable diaper body 120 into a rectangular shape of a predetermined size. The thickness of the sample 12' is the same thickness T as the disposable diaper body 120, where T = 7 mm. Further, in the sample 12', a pair of grooves 20' corresponding to the embossed portion 20 (a guide structure in which the guided sample 12' is formed into a bent shape) is symmetrically provided with respect to the center line C (center).

Further, the sample 12' has a predetermined size, that is, a lateral width La (= 176 mm) and a longitudinal length Lb (= 150 mm), and the groove 20' is disposed at a distance Lc (= 38 mm) from the center line C. Therefore, the distance Ls from the groove 20' of the sample 12' to the end edge in the width direction becomes 50 mm in accordance with the lateral width La and the distance Lc.

Further, as shown in Fig. 6B, both ends in the width direction of the sample 12' are compressed with respect to the section thickness Tmm of the disposable diaper main body 120 to a predetermined thickness of 4 × T × 1.25 mm, at this time, the disposable diaper main body 120 The reaction force (this reaction force mainly depends on the absorber, and therefore, hereinafter also referred to as an absorber reaction force) is set so as to be 2.0 N or less and 1.0 N or more. Here, T mm = 7 mm, and therefore, it is compressed to a predetermined thickness of 35 mm.

When the reaction force of the absorber is more than 2.0 N, the feeling of pressure on the wearer is increased, and the possibility of lowering the wearing feeling becomes high. Further, from this point of view, the reaction force of the absorber is more preferably 1.5 N or less. On the other hand, when the reaction force of the absorber is less than 1.0 N, the possibility of improperly deforming into a W-shaped bent shape becomes high.

In addition, the value of the above-mentioned absorber reaction force is obtained based on the measurement value obtained by performing the compression test as described below on each measurement sample using the tensile compression tester (Strograph VG1E).

Here, the procedure for measuring the reaction force of the disposable diaper main body 120 by a compression test will be described.

(1) First, the crotch portion of the disposable diaper 1 was cut into a size of 176 mm (width direction) × 150 mm (longitudinal direction) to prepare a sample for measurement. However, when the length is not satisfied, the cutting is performed at the maximum length. Here, as shown in the following Table 1, 13 samples of sample numbers 1 to 13 were prepared.

(2) When the measurement is performed, each measurement sample is formed into a rib in the longitudinal direction at the center in the width direction, and is bent so as to protrude toward the skin surface side.

(3) Further, ribs are formed in the longitudinal direction on both sides of the center of the width direction of each measurement sample and within 80 mm from the center, and are bent so as to protrude toward the non-skin surface side.

However, in the case of having a groove portion, it is bent at the groove portion.

(4) Further, a bent sample was placed between the chucks of the tensile compression tester (Strograph VG1E), and the value at the time of compression was measured.

The conditions of the compression test were such that the load cell was set to 100 N, the test speed was set to 40 mm/min, and the load weight range was set to ×20 (5 N).

Sample Nos. 1 to 5 are those having a slit as a guide bending structure (guide structure) at a portion corresponding to the embossed portion, and the basis weight of the pulp is fixed (300 g/m ² ) and the length of the slit is fixed ( 100 mm), but the width of the slit is different from the combination of the thickness of the slit portion. Further, the basis weight of the pulp is mainly the basis weight of the mat 12.

Sample No. 6 was not provided with a guide structure (having neither a slit nor an embossing), and the basis weight of the pulp was 315 g/m ² .

Sample Nos. 7 to 13 are those having embossing as a structure for guiding bending (guide structure), and the combination of the basis weight of the pulp, the embossing width, the embossing length, and the thickness of the embossed portion is different.

Sample No. 7, 9, 11, and 13 are the standard values of the pulp per unit weight (315 g/m ² ), whereas the sample No. 8 is the smaller basis weight of the pulp (196 g/m ² ). The sample No. 10 and 12 series pulps have a large basis weight (330 g/m ² , 350 g/m ² ).

Further, sample numbers 7 to 10, 12, and 13 were all embossed widths of 3 mm, but sample No. 11 was embossed width of 7 mm.

Regarding the embossing length, sample numbers 7 and 8 were 170 mm, and sample numbers 9 to 13 were 195 mm.

Regarding the thickness of the embossed portion, the sample numbers 7 to 10, 12, and 13 are 0.46 to 0.78 mm, and the sample number 11 is larger than the above and 2.1.

The absorber reaction force was obtained for each sample by a compression test as shown in Table 1 below. Moreover, the disposable diaper 1 corresponding to each sample was attached, and the ease of the W-shaped deformation and the wearing feeling were evaluated. Each evaluation was evaluated on 5 levels of 1 to 5, and the higher the number, the higher the evaluation (1 < 2 < 3 < 4 < 5, and 5 is the highest evaluation).

As shown in Table 1, the reaction force of the absorber can be lowered by providing slits or embossing. However, even if embossing is provided, when the basis weight of the pulp of the mat 12 is high or when the thickness of the embossed portion is large, the reaction force of the absorbent body tends to be high.

Further, in terms of the ease of W-shaped deformation, the evaluation of the lower reaction force of the absorber is high, but in terms of the wearing feeling, the reaction force of the absorber tends to be low regardless of whether it is too high or too low.

According to these, in order to make the W-shaped deformation easy and the wearing feeling high, the basis weight of the pulp is preferably 340 or less, more preferably 325 or less, and more preferably 200 or more. Further, the reaction force of the absorber is preferably 3.4 or less, more preferably 2.5 or less, still more preferably 2.0 or less, still more preferably 1.5 or less. Further, the reaction force of the absorber is preferably 1.0 or more.

When the slit is provided, when the length is set to about 100 mm, the slit width is preferably from 1 to 30 mm, more preferably from 1 to 20 mm. Further, the thickness of the slit portion is preferably only a small amount (5.0 mm or less) from 0 (through).

When the embossing is set, the length is set to about 170 to 200 mm, and the embossing width is preferably 1 to 10 mm, more preferably 1 to 6 mm. Further, the thickness of the embossed portion is preferably 0.2 to 3.0 mm, more preferably 0.2 to 2.0 mm.

Further, in the case where the water spraying step is provided before the embossing processing step, it is considered that the amount of water sprayed (the amount of water sprayed) affects the shape retention of the embossed portion 20. Here, as a parameter for determining the shape retention ability, focusing on the peel strength, a peel strength test is performed by preparing a plurality of water spray amounts different for the same sample.

Here, the procedure for measuring the peel strength will be described.

(1) The center portion of the underside of the disposable diaper 1 was cut into a size of 176 mm (width direction) × 50 mm (length direction), and a sample was prepared for measurement. When the length is not satisfied, the cutting is performed at the maximum length. In the measurement sample, sample No. 7 which was highly evaluated for both the ease of W-shaped deformation and the wearing feeling was applied, and the amount of water sprayed was different as shown in Table 2 below.

Specifically, Sample No. 7 in which water spray (water spray amount 0 [g/m ² ]), sample number 7A in which the water spray amount is 10 [g/m ² ], and water spray amount of 20 [g/m ² ] are prepared. Sample No. 7B, sample number 7C of water spray amount of 40 [g/m ² ].

(2) Next, at the width direction end of the measurement sample, peeling was performed between the skin surface side tissue and the non-skin side tissue paper interposed between the absorbent body.

(3) Next, the end of each of the peeling ends in the width direction was placed under the grip of a peeling tester (Strograph), and the peeling strength of the embossed portion was measured.

As a result, the results as shown in Table 2 below were obtained.

The higher peel strength can maintain the groove formed by embossing during use. As shown in Table 2, sample No. 7, sample No. 7A, and sample No. 7B were increased in the order of 0 to 10 → 20 (units were [g/m ² ]) in accordance with the order of the water spray, and the peel strength was continuously increased. However, the sample number 7C in which the amount of water spray is increased as compared with the sample No. 7B, although the amount of water spray is increased, the peel strength is lowered.

When the amount of water spray is continuously increased, the fibers of the pulp constituting the mat 12 are easily adhered to each other due to the viscosity or surface tension of the water, and the embossing strength (groove) obtained by the embossing process is increased, but If the amount of water spray is excessively increased, the SUP in the pad 12 will absorb water and the peel strength will decrease.

According to the result, in the water spray step of the production step, when the water is applied by the atomizer in the range of 1 to 60 [g/m ² ], the water spray amount is preferably from 1 to 35 [g/m ² ], Good is 12~35[g/m ² ].

Further, it is also possible to apply a hot-melt adhesive to the embossed portion together with the water spray.

 [3. Function and effect]  

Since the disposable diaper is constructed as described above, the following effects and effects can be obtained.

By forming the embossed portion 20, as shown in Fig. 5, in the crotch portion 1B, the cross section of the pad 12 is curved in a "W" shape so that the center in the width direction of the pad 12 protrudes toward the skin surface side. Therefore, the adhesion between the wearer's skin surface and the pad 12 is improved, and the absorbency of the excrement can be improved. Further, since the edge portion in the width direction of the mat 12 also protrudes toward the skin surface side, it is possible to suppress leakage of excrement from the edge portion in the width direction of the mat 12.

In the case of the present embodiment, the pad 12 is contracted in the longitudinal direction by the second elastic member 42 of the anti-displacement wrinkle 32, and the pad 12 is lifted toward the skin surface side, whereby the pad 12 can be reliably held in the embossing. The bend of the part 20.

Thereby, in the worn state, the crotch portion 1B of the disposable diaper 1 is bent into a predetermined shape and held, and the tactile sensation or liquid absorbing property can be ensured to improve the comfort of the wearer.

As the rigidity characteristic of the absorbent article main body 120 (mainly referred to as the rigidity characteristic of the pad 12), the thickness of both ends in the width direction with respect to the absorbent article body 120 is T mm in a W-shaped bent shape. (=7mm) When the compression force is 4×T×1.25mm (=35mm), the reaction force of the absorber (the reaction force of the absorbent article main body 120) is set to 2.0N or less, thereby avoiding the pressure on the wearer and reducing the wear. Feel the sense of wear and get a good sense of wear.

Further, when the reaction force of the absorber is set to 1.5 N or less, a better wearing feeling can be obtained.

Further, since the reaction force of the absorber is 1.0 N or more, it can be appropriately deformed into a W-shaped bent shape.

Further, as a criterion for setting the rigidity characteristics of the mat 12, instead of the sample 12', a V-shaped bent shape sample having the same longitudinal dimension and one side half of the center line as in the present embodiment may be prepared and The reaction force of the absorber when the cross-sectional thickness T mm of the absorbent article main body 120 is compressed to 2 × T × 1.25 mm is set to 2.0 N or less (preferably 1.5 N or less) and 1.0 N or more.

 [II. Others]  

Although the embodiments of the present invention have been described above, the present invention may be modified as follows.

For example, in the above-described embodiment, the three wrinkles and the waist gathers 34 of the leg gathers 31, the anti-shift wrinkles 32, and the three-dimensional gathers 33 are provided to obtain the effects, but the wrinkles are not necessarily required. Pleats.

Further, in the above-described embodiment, the embossed portion 20 is provided as a guiding structure for guiding the pad 12 so as to be bent. However, as the guiding structure, the pad 12 is partially thinned or the material is changed to reduce rigidity. Just fine.

Further, in the present embodiment, the wearable article (absorbent article) for the absorbent article in which the pad (absorbent body) 12 is attached and the other pad (absorbent body) 50 can be attached and detached is exemplified, but the present invention can also be applied to the inside. A wearable article (absorbent article) for an absorbent article in which a pad (absorbent body) 12 is not attached and detached.

Claims (8)

 An absorbent article main body which is provided in an absorbent article having a longitudinal direction, a width direction and a thickness direction which are orthogonal to each other and which is disposed on both surfaces of the absorbent body, and is characterized in that the absorbent article body is The center of the width direction forms an edge in the longitudinal direction, and is bent so as to protrude toward the surface side of the skin, and further forms a rib in the longitudinal direction on both sides of the center in the width direction to bend toward the non-skin side. When the thickness T mm of the absorbent article main body is compressed to 4 × T × 1.25 mm, the reaction force of the absorbent article body is 2.0 N or less.    The absorbent article main body according to claim 1, wherein the absorbent body has two groove-shaped portions extending in the longitudinal direction, and the groove portion is formed with ribs in the longitudinal direction on both sides of the center in the width direction, Bend to the non-skin side.    An absorbent article main body which is provided on an absorbent article and has a sheet formed on both surfaces of the absorbent body, wherein the absorbent article has a front body piece, a crotch lower part, and a back body piece in the longitudinal direction in the longitudinal direction. Disposed along the front and rear directions of the wearer's armpit, the absorbent article body is characterized by having a guiding structure guided in such a manner that the armpit position including the wearer is included in the length In the direction in which the cross-section is a W-shaped cross-sectional shape in which the center portion protrudes toward the skin surface side at the time of wearing, the W-shaped bending shape is deformed so that both ends in the width direction are opposed to each other. When the cross-sectional thickness T mm of the absorbent article main body is compressed to 4 × T × 1.25 mm, the reaction force of the absorbent article main body is 2.0 N or less.    The absorbent article body of claim 3, wherein the guiding structure comprises a pair of groove-like portions extending in the longitudinal direction.    The absorbent article body according to any one of claims 1 to 4, wherein the reaction body of the absorbent article has a reaction force of 1.5 N or less.    The absorbent article body according to any one of claims 1 to 5, wherein the reaction body of the absorbent article has a reaction force of 1.0 N or more.    An absorbent article main body which is provided in an absorbent article having a longitudinal direction, a width direction and a thickness direction which are orthogonal to each other and which is disposed on both surfaces of the absorbent body, and is characterized in that the absorbent article body is The absorbent article body is formed by forming a rib in the longitudinal direction so as to be bent in the longitudinal direction so as to protrude toward the skin surface side, and compressed to 2 × T × 1.25 mm with respect to the thickness T mm of the absorbent article body. The reaction force is 2.0N or less.    An absorbent article comprising: a front body piece, a crotch lower part, and a back body piece in the longitudinal direction, and having a wearable body disposed in a longitudinal direction along a front and rear direction of the wearer; and The absorbent article main body according to any one of claims 1 to 7, wherein the absorbent article is disposed in the longitudinal direction in a direction in which the wearer is in a front-rear direction.