JP5863890B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  Patent Document 1 and Patent Document 2 include a top sheet, a pair of side sheets disposed on both sides of the skin contact surface of the top sheet, a back sheet, and an absorption disposed between the top sheet and the back sheet. An absorbent article comprising a body is described.

  In Patent Document 1, the side sheet is joined to the top sheet by a joining line that is substantially continuous in the length direction of the absorbent article, and at least a part of the joining line overlaps the absorber in plan view. Yes.

  In Patent Document 2, the side sheet has a base end portion fixed to the top sheet on both sides of the absorber, a free end portion not fixed to the top sheet, and an elastic body attached to the free end portion. It rises from both sides of the absorber due to the urging of the elastic body.

Japanese Patent No. 4152349 Japanese Patent Laid-Open No. 05-220191

  In Patent Document 1, since the side sheet overlaps the absorbent body in the thickness direction of the absorbent article, the transition of the liquid supplied to the absorbent article to the absorbent body is hindered by the side sheet, and the liquid from the absorbent article is liquid. May leak.

  In Patent Document 2, when the side sheet rising from both sides of the absorbent body falls to the inside of the absorbent body and the side sheet overlaps the absorbent body in the thickness direction of the absorbent article, the liquid supplied to the absorbent article The transfer to the absorbent body is hindered by the side sheet, and the liquid may leak from the absorbent article.

  Then, an object of this invention is to provide the absorbent article which can prevent the leakage of the liquid from an absorbent article.

In order to solve the above problems, the present invention provides:
An absorbent article having a length direction, a width direction, and a thickness direction orthogonal to each other, a first surface located on one side of the thickness direction, and a second surface located on the other side of the thickness direction. There,
The first surface is adjacent to the central region extending in the length direction, a first adjacent region adjacent to the central region on one side in the width direction, and the central region on the other side in the width direction. A second adjacent region,
The absorbent article includes a liquid-permeable top sheet that forms the central region, a liquid-repellent first side sheet that forms the first adjacent region, and a liquid-repellent material that forms the second adjacent region. A second side sheet, a liquid-impermeable back sheet that forms the second surface, and a liquid-absorbing absorber provided between the top sheet and the back sheet,
The central region has a first overlapping region that overlaps the absorber in the thickness direction,
The first adjacent region has a second overlapping region that overlaps the top sheet in the thickness direction,
The second adjacent region has a third overlapping region that overlaps the top sheet in the thickness direction,
At least one of the second overlapping region and the third overlapping region provides the absorbent article that is located at an interval in the width direction with respect to the first overlapping region.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can prevent the leakage of the liquid from an absorbent article is provided.

FIG. 1 is a plan view of an absorbent article according to an embodiment of the present invention. 2A is a cross-sectional view taken along line AA in FIG. 1, FIG. 2B is an enlarged view of a portion indicated by B in FIG. 2A, and FIG. FIG. 3 is an enlarged view of a portion indicated by C in FIG. FIG. 3A is a plan view of the top sheet mounted on the absorbent article shown in FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB in FIG. 4A is a plan view of a first side sheet and a second side sheet mounted on the absorbent article shown in FIG. 1, and FIG. 4B is a cross-sectional view taken along line BB in FIG. FIG. 4C is a cross-sectional view taken along line CC in FIG. 4A. FIG. 5 (A) is a perspective view of liquid permeation holes formed in the first side sheet and the second side sheet of the absorbent article shown in FIG. 1, and FIG. 5 (B) is FIG. 5 (A). FIG. 5C is a cross-sectional view taken along the line C-C of FIG. 5A. 6 (A) and 6 (B) are plan views showing an embodiment in which the adhesive portion is formed by a plurality of adhesive lines. FIG. 7 is a view for explaining a region of the first surface of the absorbent article shown in FIG. FIG. 8 is a view for explaining a gear stretching roll used for gear stretching of the top sheet.

  Hereinafter, embodiments included in the absorbent article of the present invention will be described. In the present specification, of both sides in the length direction, the proximal side of the virtual center line extending in the width direction through the center of the absorbent article is expressed as “inner side in the length direction”, and the distal side The side may be expressed as “outside in the length direction”. Further, of the both sides in the width direction, the proximal side of the virtual center line extending in the length direction through the center of the absorbent article is expressed as “inner side in the width direction”, and the distal side is expressed as “width direction” It may be expressed as “outside”. In addition, of both sides in the thickness direction, one side in the thickness direction located on the wearer's skin side is referred to as “skin side”, and the other side in the thickness direction located on the wearer's clothing side is referred to as “clothing side” Or “underwear side”.

  An absorbent article according to an aspect of the present invention (hereinafter referred to as “Aspect 1”) is a length direction, a width direction and a thickness direction orthogonal to each other, and a first surface located on one side of the thickness direction, An absorbent article having a second surface located on the other side in the thickness direction, wherein the first surface has a central region extending in the length direction and the center on one side in the width direction. A liquid-permeable top sheet that has a first adjacent region adjacent to the region and a second adjacent region adjacent to the central region on the other side in the width direction, and the absorbent article forms the central region A liquid-repellent first side sheet that forms the first adjacent region, a liquid-repellent second side sheet that forms the second adjacent region, and a liquid-impervious that forms the second surface Back sheet, liquid absorption provided between the top sheet and the back sheet The central region has a first overlap region that overlaps the absorber in the thickness direction, and the first adjacent region overlaps the top sheet in the thickness direction. And the second adjacent region has a third overlapping region that overlaps the top sheet in the thickness direction, and at least one of the second overlapping region and the third overlapping region is the first overlapping region. The absorbent article is located at an interval in the width direction with respect to an overlapping region.

  In the absorbent article according to aspect 1, at least one of the second overlapping region and the third overlapping region is located at an interval in the width direction with respect to the first overlapping region. That is, since at least one of the first side sheet and the second side sheet does not overlap the absorbent body in the thickness direction, the transition of the liquid supplied to the absorbent article to the absorbent body is not easily inhibited by the side sheet. . Therefore, the absorbent article which concerns on aspect 1 prevents the leakage of the liquid from an absorbent article resulting from at least one overlapping with an absorber in a thickness direction among a 1st side sheet and a 2nd side sheet. Can do.

  In a preferred aspect of the absorbent article according to aspect 1 (hereinafter referred to as “aspect 2”), the interval is equal to or less than the thickness of the absorber.

  Due to the inward force in the width direction applied to the absorbent article, the first surface of the absorbent article is bent into valley folds at both edges in the width direction of the first overlap region, and further, the second overlap region There are cases where the two ends of the width direction are folded into mountain folds at the inner edge (center region side) of the edge and the inner edge (center region side) of the edge of the third overlapping region in the width direction. In this case, if the interval between the first overlap region and the second overlap region and / or the interval between the first overlap region and the third overlap region is larger than the thickness of the absorber, the first overlap region and the second overlap region Due to the deformation of the region between the overlapping regions and / or the deformation of the region between the first overlapping region and the third overlapping region, the second overlapping region and / or the third overlapping region is changed in the thickness direction. There is a risk of overlapping one overlapping region (that is, the first side sheet and / or the second side sheet overlaps the absorber in the thickness direction). In this regard, in the absorbent article according to aspect 2, the distance between the first overlapping area and the second overlapping area and / or the distance between the first overlapping area and the third overlapping area is equal to or less than the thickness of the absorber. . Therefore, even if the force which goes to the inner side of the width direction is applied with respect to the absorbent article which concerns on aspect 2, a 1st side sheet and / or a 2nd side sheet are hard to overlap with an absorber in the thickness direction.

  In a preferred aspect of the absorbent article according to aspect 1 or 2 (hereinafter referred to as “aspect 3”), the absorbent article includes the top sheet and the first side sheet as a first joint, 2nd joining part which joins said 1st junction part located in 2 overlap area, and / or said top sheet and said 2nd side sheet, Comprising: said 2nd located in said 3rd overlap area Has a joint.

  The 1st junction part and / or the 2nd junction part can block the spread to the width direction between the top sheet and the back sheet of the liquid which permeated the top sheet. Therefore, the absorbent article which concerns on aspect 3 can prevent the leakage of the liquid from an absorbent article resulting from the liquid which permeate | transmitted the top sheet spreading the inside of an absorbent article in the width direction. In addition, since the first side sheet and the second side sheet are liquid repellent, the liquid that has passed through the top sheet is less likely to ooze from the first joint portion and / or the second joint portion. Therefore, the absorbent article which concerns on aspect 3 can prevent the leakage of the liquid from an absorbent article resulting from the liquid which permeate | transmitted the top sheet oozing out from a 1st junction part and / or a 2nd junction part. it can.

  In a preferred aspect of the absorbent article according to aspect 3 (hereinafter referred to as “aspect 4”), the edge on the central region side and / or the second edge of both end edges in the width direction of the first side sheet. Of the both side edges of the side sheet in the width direction, the edge on the central region side is a free edge that is not fixed to the top sheet.

  The free edge of the first side sheet and / or the free edge of the second side sheet can prevent the liquid from flowing out in the width direction from the central region. For this reason, the liquid that has flowed out in the width direction from the central region is unlikely to leak beyond the free edge of the first side sheet and / or the free edge of the second side sheet. Therefore, the absorbent article which concerns on aspect 4 can prevent the leakage from the absorbent article of the liquid which flowed out in the width direction from the center area | region.

  In a preferred embodiment of the absorbent article according to any one of Embodiments 1 to 4 (hereinafter referred to as “Aspect 5”), both the second overlapping region and the third overlapping region are the same as the first overlapping region. Located at intervals in the width direction.

  In the absorbent article which concerns on aspect 5, neither the 1st side sheet nor the 2nd side sheet has overlapped with the absorber in the thickness direction. Therefore, the absorbent article which concerns on aspect 5 can prevent the leakage of the liquid from an absorbent article resulting from a 1st side sheet and a 2nd side sheet overlapping with an absorber in the thickness direction.

  In a preferred aspect of the absorbent article according to any one of aspects 1 to 5 (hereinafter referred to as “aspect 6”), the absorbent article extends from the main body part to one side in the width direction from the main body part. A first wing portion and a second wing portion extending from the main body portion to the other side in the width direction, and the first adjacent region has a region corresponding to a surface of the first wing portion. The second adjacent region has a region corresponding to the surface of the second wing portion, and the second surface corresponds to a region corresponding to the surface of the first wing portion and the surface of the second wing portion. A region corresponding to the surface of the first wing portion and a region corresponding to the surface of the second wing portion of the second surface, respectively, the first adhesive portion and the second adhesive portion, respectively. The first side seat is adjacent to the first side seat. Region has a plurality of liquid passage holes are formed with an opening to, on the second side sheet, a plurality of liquid passage holes having openings in the second adjacent regions is formed.

  When the absorbent article according to aspect 6 is worn, the main body portion is installed on the skin contact surface of the crotch portion of the underwear, and the first wing portion and the second wing portion are on the non-skin contact surface side of the crotch portion of the underwear It is folded back (on the opposite side of the skin contact surface). For this reason, the liquid supplied to the central region tends to flow out in the width direction. At this time, the liquid flowing out in the width direction is captured at the opening of the liquid permeable hole existing in the first adjacent region and the second adjacent region, and passes through the first side sheet and the second side sheet through the liquid permeable hole. To do. Therefore, the absorbent article which concerns on aspect 6 can prevent the leakage from the absorbent article of the liquid which flowed out toward the width direction.

In a preferred aspect of the absorbent article according to aspect 6 (hereinafter referred to as “aspect 7”),
The liquid permeable hole formed in the first side sheet is a recess formed in the first side sheet, and a part of an inner peripheral surface forming the recess has a thickness of the first side sheet. The recess being separated from the first adjacent region by a slit penetrating in a direction;
The liquid permeation hole formed in the second side sheet is a recess formed in the second side sheet, and a part of an inner peripheral surface forming the recess has a thickness of the second side sheet. It is the said recessed part divided | segmented from the said 2nd adjacent area | region by the slit penetrated in the direction.

  In the absorbent article according to Aspect 7, the liquid that has permeated through the top sheet is difficult to see through the liquid permeation holes and is difficult to ooze through the liquid permeation holes.

  In one aspect of the absorbent article according to aspect 7 (hereinafter referred to as “aspect 8”), the slit extends in the length direction.

  In the absorbent article which concerns on aspect 8, a slit becomes a bending origin and it is easy to bend | fold a 1st wing part and a 2nd wing part. Further, since the liquid that has reached the slit is likely to diffuse in the length direction, leakage of the liquid from the width direction can be prevented.

  In a preferred embodiment of the absorbent article according to any one of Embodiments 6 to 8 (hereinafter referred to as “Aspect 9”), the first adjacent region includes a fourth overlapping region that overlaps the first adhesive portion in the thickness direction. And the second adjacent region has a fifth overlapping region that overlaps the second adhesive portion in the thickness direction, and the opening of the liquid permeable hole formed in the first side sheet has the first The opening of the liquid permeable hole formed between the second overlapping region and the fourth overlapping region and formed in the second side sheet is between the third overlapping region and the fifth overlapping region. Located in.

  In the absorbent article according to aspect 9, the liquid permeable opening formed in the first side sheet is located between the second overlapping region and the fourth overlapping region, and the liquid formed in the second side sheet. The opening of the transmission hole is located between the third overlapping region R and the fifth overlapping region. That is, the opening part of the liquid permeation hole formed in the first side sheet is formed between the edge on the fourth overlapping region side of the both ends in the width direction of the second overlapping region and the point on the outline of the fourth overlapping region. Of these, it exists between a virtual straight line that passes through the point closest to the second overlapping region and extends in the length direction X, but does not exist outside the virtual straight line in the width direction. Similarly, the opening portion of the liquid permeable hole formed in the second side sheet has an edge on the fifth overlap region side of both end edges in the width direction Y of the third overlap region and a contour line of the fifth overlap region. It exists between the points that are located closest to the third overlapping region and passes through a virtual straight line that extends in the length direction X, but does not exist outside the virtual straight line in the width direction. These virtual straight lines tend to be folding lines when the first wing portion and the second wing portion are folded back to the non-skin contact surface side of the crotch portion of the underwear. When the first wing portion and the second wing portion are folded back along these virtual straight lines, the portions located on the outer side in the width direction with respect to these virtual straight lines are located on the wearer's clothing side. There is no opening of the transmission hole. Therefore, even if the liquid that has permeated through the top sheet spreads in the width direction in the absorbent article, the liquid hardly oozes out from these portions. Moreover, since the opening part of a liquid permeation hole does not exist in these parts, the intensity | strength of the part which forms a 1st wing part and a 2nd wing part among a 1st side sheet and a 2nd side sheet becomes sufficient. Therefore, when the first wing part and the second wing part are fixed to the non-skin contact surface of the crotch part of the underwear by the first adhesive part and the second adhesive part, the absorbent body by the first adhesive part and the second adhesive part The effect of preventing the deviation of the article is easily exhibited.

  The kind and application of the absorbent article of the present invention are not particularly limited. Examples of the absorbent article include sanitary articles such as sanitary napkins, disposable diapers, and panty liners, and these may target humans and non-human animals such as pets. Examples of the liquid to be absorbed by the absorbent article of the present invention include liquid excrement such as menstrual blood, descending matter, urine, and watery stool. Hereinafter, a sanitary napkin 1 according to an embodiment of the absorbent article of the present invention will be described based on the drawings.

  Hereinafter, a basic configuration of the sanitary napkin 1 will be described with reference to FIGS. 1 and 2. 1 is a plan view of the sanitary napkin 1, FIG. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is an enlarged view of a portion indicated by B in FIG. FIG. 2C is an enlarged view of a portion indicated by C in FIG. In FIG. 2, the liquid permeable holes 6 formed in the first side sheet 31 and the second side sheet 32 are omitted for the purpose of simplifying the drawing.

  The sanitary napkin 1 has a length direction X, a width direction Y, and a thickness direction Z that are orthogonal to each other. In addition, the direction X, the direction Y, and the direction Z shown in other drawings correspond to the length direction X, the width direction Y, and the thickness direction Z shown in FIGS. 1 and 2, respectively.

The sanitary napkin 1 has a first surface S ₁₁ located on one side in the thickness direction Z and a second surface S ₁₂ located on the other side in the thickness direction Z.

  The sanitary napkin 1 includes a main body part 10, a first wing part 11 extending from the main body part 10 to one side in the width direction Y, and a second wing part extending from the main body part 10 to the other side in the width direction Y. Twelve. The first wing portion 11 and the second wing portion 12 extend in the width direction Y from substantially the center of both end edges in the width direction Y of the main body portion 10. Of the peripheral edges of the first wing part 11 and the second wing part 12, parts other than the base end edge connected to the main body part 10 are free end edges that are not connected to the main body part 10. Therefore, the first wing portion 11 and the second wing portion 12 can be bent with respect to the main body portion 10 with the base edge as an axis.

The first surface S ₁₁ of the sanitary napkin 1 includes a central region R ₁ extending in the length direction X, a first adjacent region R ₂ adjacent to the central region R ₁ on one side in the width direction Y, and the width direction. And the second adjacent region R ₃ adjacent to the central region R ₁ on the other side of Y. Central region R ₁ is located substantially at the center in the width direction Y of the first surface S _11, on one side in the longitudinal direction X from the end edge to the edge of the other side in the longitudinal direction X of the first surface S ₁₁ Extend. The first adjacent region R ₂ is in contact with the edge on one side in the width direction Y of the central region R _{1 at} the boundary line B ₁ , and the second adjacent region R ₃ is on the other side in the width direction Y of the central region R ₁ . meet at the edge and boundary B _2. The boundary line B ₁ is formed by the inner edge 311 (at the center region R ₁ side) of both end edges in the width direction Y of the first side sheet 31, and the boundary line B ₂ is the width direction of the second side sheet 32. Of both end edges of Y, it is formed by an end edge 321 on the inner side (central region R ₁ side).

The sanitary napkin 1 forms a liquid-permeable top sheet 2 that forms a central region R ₁ , a liquid-repellent first side sheet 31 that forms a first adjacent region R ₂ , and a second adjacent region R ₃ . a second side sheet 32 of the liquid repellency of a liquid-impervious backsheet 4 of forming the second surface S _12, the absorbent of the absorbent body 5 which is provided between the topsheet 2 and the backsheet 4 With.

The sanitary napkin 1 is worn such that the first surface S ₁₁ is located on the skin side of the wearer and the second surface S ₁₂ is located on the underwear side of the wearer. The liquid excretion excreted from the wearer penetrates the absorbent body 5 through the top sheet 2 and is absorbed and held by the absorbent body 5. Leakage of liquid excretion absorbed and held by the absorbent body 5 is prevented by the back sheet 4.

  The top sheet 2 is a liquid permeable sheet. The liquid-permeable sheet used as the top sheet 2 in this embodiment is a nonwoven fabric. As a nonwoven fabric, an air through nonwoven fabric, a spun bond nonwoven fabric, a point bond nonwoven fabric etc. are mentioned, for example.

  The first side sheet 31 and the second side sheet 32 are liquid repellent sheets. In the present embodiment, the liquid repellent sheet used as the first side sheet 31 and the second side sheet 32 is a synthetic resin sheet (synthetic resin film) in which a plurality of liquid permeable holes 6 are formed. Examples of other water-repellent sheets include non-woven fabrics subjected to water-repellent processing. The liquid repellency of the first side sheet 31 and the second side sheet 32 is exhibited based on the characteristics of the synthetic resin sheet. The first side sheet 31 and the second side sheet 32 have liquid permeability. Since the synthetic resin sheet itself does not have liquid permeability, the liquid permeability of the first side sheet 31 and the second side sheet 32 is exhibited based on the plurality of liquid transmission holes 6 formed in the synthetic resin sheet. . Examples of the synthetic resin constituting the synthetic resin sheet include polyolefins such as low-density polyethylene, linear low-density polyethylene, high-density polyethylene, and polypropylene; olefins and other monomers (for example, acrylic ester, vinyl acetate, etc.) A polyester such as polyethylene terephthalate. The thickness, basis weight, and the like of the first side sheet 31 and the second side sheet 32 are appropriately adjusted from the viewpoint of the formability of the liquid permeable holes 6 and the like.

  In the present embodiment, the liquid permeable holes 6 are formed in the first side sheet 31 and the second side sheet 32. However, the liquid permeation hole 6 can be omitted.

The first side sheet 31 forms the main body portion 10 and extends from the main body portion 10 to one side in the width direction Y to form the first wing portion 11. Therefore, the first adjacent region R ₂ formed by the first side sheet 31 has a region corresponding to the surface of the first wing portion 11. The second side sheet 32 forms the main body portion 10 and extends from the main body portion 10 to the other side in the width direction Y to form the second wing portion 12. Therefore, the second adjacent region R ₃ formed by the second side sheet 32 has a region corresponding to the surface of the second wing portion 12.

  The back sheet 4 is a liquid-impermeable sheet. The liquid-impermeable sheet used as the back sheet 4 is, for example, a waterproof nonwoven fabric, a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, or the like. The thickness, basis weight, and the like of the backsheet 4 are appropriately adjusted in consideration of liquid impermeability and the like.

The back sheet 4 forms the main body portion 10 and extends from the main body portion 10 to both sides in the width direction Y to form the first wing portion 11 and the second wing portion 12. Therefore, the second surface S ₁₂ formed by the back sheet 4 has a region corresponding to the surface of the first wing part 11 and a region corresponding to the surface of the second wing part 12. Of the top sheet 2, the first side sheet 31, and the second side sheet 32, a portion that overlaps the peripheral edge of the back sheet 4 is joined to the back sheet 4 by a seal portion (not shown). As a joining mode by a seal part, joining by heat emboss processing, joining by a hot-melt type adhesive agent, etc. are mentioned, for example.

  The absorber 5 contains an absorbent material that can absorb liquid excreta. Examples of the absorbent material include hydrophilic fibers and superabsorbent polymers. Examples of hydrophilic fibers include cellulosic fibers such as pulp. Examples of the superabsorbent polymer (SAP) include polyacrylate, polysulfonate, anhydrous maleate, polyacrylamide, polyvinyl alcohol, and polyethylene oxide.

  The absorber 5 is comprised from an absorptive material layer and the liquid-permeable core wrap which coat | covers an absorptive material layer, for example. The liquid-permeable sheet used as the core wrap is, for example, a nonwoven fabric such as a tissue.

  Hereinafter, a basic configuration of the top sheet 2 will be described with reference to FIG. 3A is a plan view of the top sheet 2, and FIG. 3B is a cross-sectional view taken along the line BB of FIG. 3A. In FIG. 3A, in order to clarify the positional relationship between the first side sheet 31 and the second side sheet 32 with respect to the top sheet 2, the first side sheet 31 and the second side sheet 32 are indicated by imaginary lines. Has been.

The top sheet 2 has a first surface S ₂₁ located on one side in the thickness direction Z and a second surface S ₂₂ located on the other side in the thickness direction Z. The top sheet 2 is mounted on the sanitary napkin 1 so that the first surface S ₂₁ is located on the skin side of the wearer and the second surface S ₂₂ is located on the back sheet 4 side.

  The top sheet 2 has both end edges 201 and 202 in the width direction Y. Both end edges 201 and 202 extend linearly in the length direction X, but at least one of both end edges 201 and 202 may extend in a curved shape (for example, a wave shape) in the length direction X. .

  The top sheet 2 includes a first portion 21 extending in the length direction X, a second portion 22 adjacent to the first portion 21 on one side in the width direction Y, and a first portion 21 on the other side in the width direction Y. And a third portion 23 adjacent to. The first portion 21 is located approximately at the center in the width direction Y of the top sheet 2, and extends in the length direction X from one end edge in the length direction X of the top sheet 2 to the other end edge. The second portion 22 is in contact with one end edge in the width direction Y of the first portion 21, and the third portion 23 is in contact with the other end edge in the width direction Y of the first portion 21. In plan view, the boundary line between the first portion 21 and the second portion 22 coincides with the inner end edge 311 of the both end edges in the width direction Y of the first side seat 31, and the first portion 21 and the third portion The boundary line with 23 coincides with the inner end edge 321 of both end edges in the width direction Y of the second side sheet 32.

  Hereinafter, based on FIG. 4, the basic structure of the 1st side seat | sheet 31 and the 2nd side seat | sheet 32 is demonstrated. 4A is a plan view of the first side sheet 31 and the second side sheet 32, and FIG. 4B is a cross-sectional view taken along the line BB in FIG. 4A. ) Is a cross-sectional view taken along the line CC of FIG. In FIG. 4A, the top sheet 2 is indicated by a virtual line in order to clarify the positional relationship of the top sheet 2 with respect to the first side sheet 31 and the second side sheet 32.

The first side sheet 31 has a first surface S ₃₁₁ located on one side in the thickness direction Z and a second surface S ₃₁₂ located on the other side in the thickness direction Z. The first surface S ₃₂₁ located on one side in the thickness direction Z and the second surface S ₃₂₂ located on the other side in the thickness direction Z. As for the 1st side sheet 31 and the 2nd side sheet 32, 1st surface _S311 and 1st surface _S321 are located in a wearer's skin side, 2nd surface _S312 and 2nd surface _S322 are the back seat _| sheet 4 side. It is mounted on the sanitary napkin 1 so as to be positioned at the position.

The first side sheet 31 has an end edge 311 as an inner end edge among both end edges in the width direction Y, and the second side sheet 32 is an end edge as an inner end edge in the both end edges in the width direction Y. It has an edge 321. Edge 311 forms a boundary B ₁ between the central region R ₁ and the first adjacent region R _2, the edge 321 may form a boundary B ₂ for the central region R ₁ and the second adjacent region R ₃ To do. The end edge 311 and the end edge 321 extend substantially linearly in the length direction X (therefore, the boundary line B ₁ and the boundary line B ₂ extend substantially linearly in the length direction X), At least one of the end edge 311 and the end edge 321 may extend in a curved shape (for example, a wave shape) in the length direction X.

  The first side sheet 31 includes a first portion 311 extending in the length direction X and a second portion 312 adjacent to the first portion 311 outside the width direction Y. The first portion 311 is located on the inner side in the width direction Y than the second portion 312, and extends in the length direction X from one end edge in the length direction X of the first side seat 31 to the other end edge. Exists. The second portion 312 is in contact with the outer edge of the both edges in the width direction Y of the first portion 311. In a plan view, the boundary line between the first portion 311 and the second portion 312 matches the edge 201 of the top sheet 2.

  The second side sheet 32 includes a first portion 321 extending in the length direction X and a second portion 322 adjacent to the first portion 321 outside the width direction Y. The first portion 321 is located on the inner side in the width direction Y than the second portion 322, and extends in the length direction X from one end edge in the length direction X of the second side seat 32 to the other end edge. Exists. The second portion 322 is in contact with the outer edge of both end edges in the width direction Y of the first portion 321. In a plan view, the boundary line between the first portion 321 and the second portion 322 matches the edge 202 of the topsheet 2.

The top sheet 2, the first side sheet 31, and the second side sheet 32 are arranged so that the first portion 21 of the top sheet 2 does not overlap the first side sheet 31 and the second side sheet 32 in the thickness direction Z. Two second portions 22 are located between the first portion 311 of the first side seat 31 and the back seat 4 so as to overlap the first portion 311 of the first side seat 31 in the thickness direction Z, and The top sheet third portion 23 is positioned between the first portion 321 of the second side sheet 32 and the back sheet 4 and overlaps the first portion 321 of the second side sheet 32 in the thickness direction Z. It is mounted on the napkin 1 for use. Therefore, the region corresponding to the surface of the first portion 21 in the first surface S ₂₁ of the top sheet 2 forms the central region R ₁ of the first surface S ₁₁ of the sanitary napkin 1, and the first side sheet 31. The first surface S ₃₁₁ forms a first adjacent region R ₂ of the first surface S ₁₁ of the sanitary napkin 1, and the first surface S ₃₂₁ of the second side seat 32 is the first surface of the sanitary napkin 1. forming a second adjacent region R ₃ of S _11.

  Hereinafter, a basic configuration of the liquid permeable holes 6 formed in the first side sheet 31 and the second side sheet 32 will be described based on FIG. 5. FIG. 5A is a perspective view of the liquid permeable hole 6 formed in the first side sheet 31 and the second side sheet 32, and FIG. 5B is a cross-sectional view taken along line BB in FIG. FIG. 5C is a cross-sectional view taken along the line CC of FIG.

The liquid permeable hole 6 formed in the first side sheet 31 has an opening 60 formed in the first adjacent region R ₂ (first surface S ₃₁₁ ), and the liquid permeable formed in the second side sheet 32. The hole 6 has an opening 60 formed in the second adjacent region R ₃ (first surface S ₃₂₁ ). When the sanitary napkin 1 is worn, the main body portion 10 is installed on the skin contact surface of the crotch portion of the underwear, and the first wing portion 11 and the second wing portion 12 are on the non-skin contact surface side of the crotch portion of the underwear. It is folded back (on the opposite side of the skin contact surface). For this reason, the liquid excrement supplied to the central region R ₁ tends to flow out in the width direction Y. At this time, the liquid excrement flowing out in the width direction Y is captured at the opening 60 of the liquid permeation hole 6 existing in the first adjacent region R ₂ and the second adjacent region R ₃ , and is then passed through the liquid permeation hole 6. It passes through the first side sheet 31 and the second side sheet 32. Therefore, the sanitary napkin 1 can prevent leakage of liquid excrement flowing out in the width direction Y from the sanitary napkin 1.

  In the present embodiment, the opening 60 has a substantially rectangular shape in plan view, but the shape of the opening can be changed. As an example of a change, plane view substantially elliptical shape etc. are mentioned, for example.

In the present embodiment, the opening area of the opening 60 is substantially constant between the liquid transmission holes 6, but the opening area of the opening 60 may be different between the liquid transmission holes 6. The opening area of one opening 60 is preferably 0.05 to ⁵ mm ² , more preferably 0.1 to ² mm ² . The measurement of the opening area of the opening 60 is performed as follows. By binarizing the image of the first surface S ₁₁ of the sanitary napkin 1 taken with a microscope or the like, the region of the target opening 60 is extracted from the image of the first surface S ₁₁ of the sanitary napkin 1. Then, the area of the extraction region is calculated, and the calculated area is set as the opening area of the opening 60. For such measurement, for example, a digital microscope manufactured by Keyence Corporation and attached software can be used, but other photographing equipment and image processing software capable of storing image data may be used.

  In this embodiment, the interval between the two openings 60 adjacent in the length direction X and the interval between the two openings 60 adjacent in the width direction Y are substantially constant, but the two openings adjacent in the length direction X. The interval between the portions 60 and / or the interval between the two openings 60 adjacent in the width direction Y may not be constant. The interval between two openings 60 adjacent to each other in the length direction X is preferably 0.2 to 5 mm, and more preferably 0.5 to 2 mm. The interval between the two openings 60 adjacent to each other in the width direction Y is preferably 0.2 to 5 mm, and more preferably 0.5 to 2 mm. An interval between two openings 60 adjacent to each other in the length direction X passes through a point closest to the other opening 60 among points on the outline of the one opening 60, and an imaginary straight line extending in the width direction Y. The distance between the point on the contour line of the other opening 60 and the virtual straight line passing through the point closest to the one opening 60 and extending in the width direction Y. An interval between two openings 60 adjacent to each other in the width direction Y passes through a point closest to the other opening 60 among points on the contour line of the one opening 60, and an imaginary straight line extending in the length direction X. The distance from the virtual straight line passing through the point closest to the one opening 60 among the points on the contour line of the other opening 60 and extending in the length direction X.

The liquid permeation hole 6 formed in the first side sheet 31 is a recess formed in the first side sheet 31, and a part of the inner peripheral surface forming the recess forms the first side sheet 31 in the thickness direction. The liquid permeation hole 6 formed in the second side sheet 32 is a recess that is separated from the first adjacent region R ₂ (first surface S ₃₁₁ ) by the slit 64 that penetrates Z. A part of the inner peripheral surface that is the formed concave part and forms the concave part is separated from the second adjacent region R ₃ (first surface S ₃₂₁ ) by the slit 64 that penetrates the second side sheet 32 in the thickness direction Z. It is the recessed part currently divided | segmented. That is, the liquid permeable hole 6 includes a substantially rectangular bottom surface 61 and side surfaces 62 and 63 that connect both end edges of the bottom surface 61 in the length direction X and the first adjacent region R ₂ (or the second adjacent region R ₃ ). Have However, both end edges of the bottom surface 61 in the width direction Y and the first adjacent region R ₂ (or the second adjacent region R ₃ ) penetrate the first side sheet 31 (or the second side sheet 32) in the thickness direction Z. Since the liquid permeation hole 6 is divided by the slit 64, the liquid permeation hole 6 lacks the side surface connecting the both end edges of the bottom surface 61 in the width direction Y and the first adjacent region R ₂ (or the second adjacent region R ₃ ). Therefore, the liquid excrement entering the inside of the recess from the opening 60 can move to the outside of the recess through the slit 64. In the sanitary napkin 1, since the liquid permeation hole 6 has such a structure, the liquid excretion that has permeated through the top sheet 2 is difficult to see through the liquid permeation hole 6 and is difficult to ooze out through the liquid permeation hole 6. .

  The slit 64 extends in the length direction X. Therefore, the slit 64 becomes a bending base point, and the first wing part 11 and the second wing part 12 are easily bent.

The depth D of the recess (that is, the distance between the opening 60 and the bottom surface 61) is larger than the thickness T of the first side sheet 31 and the second side sheet 32. Therefore, an opening that allows the inside and the outside of the recess to communicate between the second surface S ₃₁₂ and the bottom surface 61 of the first side sheet 31 and between the second surface S ₃₂₂ and the bottom surface 61 of the second side sheet 32. The part is formed. However, the depth D of the recess may be equal to or less than the thickness T of the first side sheet 31 and the second side sheet 32. In the embodiment in which the depth D of the recess is equal to or less than the thickness T of the first side sheet 31 and the second side sheet 32, the first side sheet 31 and the second side sheet when the wearer wears the sanitary napkin 1. 32 is curved, between the second surface S ₃₁₂ and the bottom surface 61 of the first side sheet 31 and between the second surface S ₃₂₂ and the bottom surface 61 of the second side sheet 32, An opening that communicates with the outside is formed.

  The structure of the liquid permeation hole 6 can be changed as long as the liquid permeability can be maintained. As an example of the change, the liquid permeable hole 6 is a recess formed in the first side sheet 31 (or the second side sheet 32), and the first side sheet 31 (or Embodiments that are recesses in which through-holes penetrating the second side sheet 32) are formed.

  The synthetic resin sheet in which the liquid permeable holes are formed can be manufactured by gear-stretching the synthetic resin sheet. The gear stretching can be performed by, for example, a pair of gear stretching rolls 120 and 130 shown in FIG. On the outer peripheral surface of the gear stretching roll 120, teeth 121 are provided at positions corresponding to the liquid permeation holes, and portions where no teeth are provided are grooves 122. The teeth 121 and the grooves 122 are alternately arranged in the MD direction (not shown) and the CD direction (direction perpendicular to the MD direction) to form a row, and in each row, between two adjacent teeth 121. One groove 122 is located. On the outer peripheral surface of the gear stretching roll 130, teeth 131 are provided at positions corresponding to the grooves 122 of the gear stretching roll 120, and portions where the teeth 131 are not provided are grooves 132. The teeth 131 and the grooves 132 are alternately arranged in the MD direction and the CD direction to form a row. In each row, one groove 132 is located between two adjacent teeth 131. The MD direction corresponds to the length direction X, and the CD direction corresponds to the width direction Y. Each tooth has a trapezoidal shape that narrows from the bottom toward the tip, and the width W1 of the bottom and the width W2 of the tip are appropriately adjusted according to the form of the liquid permeable hole. The height H of each tooth, the pitch P between two adjacent teeth, and the like are appropriately adjusted according to the form, arrangement, and the like of the liquid permeable holes. The pair of gear extending rolls 120 and 130 are configured to mesh with each other and rotate when the teeth 121 enter the grooves 132 and the teeth 131 enter the grooves 122. The synthetic resin sheet is unevenly shaped by passing through a portion where the tooth grooves of the gear stretching rolls 120 and 130 mesh with each other. The portion formed in a convex shape by the teeth 121 of the gear stretching roll 120 corresponds to a liquid permeable hole. By adjusting the tooth spacing C, the tooth biting depth D, the heating temperature of the synthetic resin sheet, and the like when the tooth gaps of the gear stretching rolls 120 and 130 are engaged, A slit or a through-hole penetrating the synthetic resin sheet can be formed. The synthetic resin sheet can be heated by heating the gear stretching rolls 120 and 130. Further, by not chamfering the corners of the tips of the teeth 121 and 131 of the gear stretching rolls 120 and 130, slits or penetrating through the synthetic resin sheet at the time of forming the unevenness of the synthetic resin sheet Holes can be formed. In this case, the slit or the through-hole penetrating the synthetic resin sheet is formed in the portion that is gear-stretched by the corner portion that is not chamfered, but in the portion that is gear-stretched by the corner portion that is chamfered. Is not formed. Further, by forming fine scratches (concave portions) in the synthetic resin sheet before gear stretching, slits or through holes penetrating the synthetic resin sheet can be formed when the synthetic resin sheet is shaped. Formation of fine scratches (concave portions) on the synthetic resin sheet can be carried out using a knurled roll having convex portions on the outer peripheral surface and a preheating roll having a smooth surface. Since the preheating roll is heated, the synthetic resin sheet becomes soft and easy to mold. When the synthetic resin sheet passes between the knurled roll and the preheating roll, fine scratches (concave portions) are formed on the synthetic resin sheet by the convex portions of the knurled roll. Thereafter, when the synthetic resin sheet is gear-stretched, the portion where the fine scratch (recess) is formed is torn, the torn portion is widened, and a slit or a through-hole penetrating the synthetic resin sheet is formed.

Hereinafter, based on FIG.1 and FIG.2, the additional structure of the sanitary napkin 1 is demonstrated.
The sanitary napkin 1 includes a first joint 71 that joins the top sheet 2 and the first side sheet 31, and a second joint 72 that joins the top sheet 2 and the second side sheet 32. However, the 1st junction part 71 and the 2nd junction part 72 are omissible.

The first joining portion 71 joins the overlapping portion in the thickness direction Z of the top sheet 2 and the first side sheet 31, that is, the second portion 22 of the top sheet 2 and the first portion 311 of the first side sheet 31. To do. The second joining portion 72 joins the overlapping portion in the thickness direction Z of the top sheet 2 and the second side sheet 32, that is, the third portion 23 of the top sheet 2 and the first portion 321 of the second side sheet 32. To do. In plan view, the first joint portion 71 is located in the second overlapping region R _21, the second joint portion 72 is positioned in the third overlapping area R _31. Thus, in plan view, the first joint portion 71 and the second joint portion 72 is located at a distance in the width direction Y with respect to the first overlapping region R _11.

  The first joint portion 71 is a pressing groove that integrates the second portion 22 of the top sheet 2 and the first portion 311 of the first side sheet 31, and the second joint portion 72 is the third portion of the top sheet 2. 23 is a pressing groove that integrates the first portion 321 of the second side sheet 32 and the second side sheet 32. The pressing groove is a recess formed by heat embossing and opened to the top sheet 2 side. In the heat embossing process, for example, a sheet to be bonded (the top sheet 2 and the first side sheet 31 or the top sheet 2 and the second side sheet 32) between an embossing roll having a patterned convex portion and a flat roll. ). In this method, heating at the time of compression is possible by heating the embossing roll and / or the flat roll. The heating temperature, pressure, processing time, and the like in the embossing process can be adjusted as appropriate.

  The first joint portion 71 and the second joint portion 72 can block the spread of the liquid excrement that has permeated the top sheet 2 in the width direction Y between the top sheet 2 and the back sheet 4. Therefore, the sanitary napkin 1 can prevent leakage of the liquid excrement from the sanitary napkin 1 due to the liquid excretion that has permeated the top sheet 2 spreading in the width direction Y inside the sanitary napkin 1. it can. Further, since the first side sheet 31 and the second side sheet 32 are liquid repellent, the liquid excretion that has passed through the top sheet 2 is less likely to ooze out from the first joint portion 71 and the second joint portion 72. Therefore, the sanitary napkin 1 prevents leakage of liquid excrement from the sanitary napkin 1 due to the liquid excretion that has permeated through the top sheet 2 oozing out from the first joint 71 and the second joint 72. can do.

  The interface between the second part 22 of the top sheet 2 and the first part 311 of the first side sheet 31 and the interface between the third part 23 of the top sheet 2 and the first part 321 of the second side sheet 32 are bonded. It is joined by an agent (for example, a hot melt adhesive). The adhesive is not applied to the entire interface, and is applied in a pattern such as a dot, a spiral, or a stripe.

Edge 311 of the inner of the both edges in the width direction Y of the first side sheet 31 (the central region R ₁ side), and, among the inner (central region R ₁ side of both edges in the width direction Y of the second side sheet 32 ) Edge 321 is not joined to the top sheet 2 by an adhesive. Therefore, the edge 311 of the inner of the both edges in the width direction Y of the first side sheet 31 (the central region R ₁ side), and / or the inner of the both edges in the width direction Y of the second side sheet 32 ( An edge 321 on the central region R ₁ side is a free edge that is not fixed to the top sheet 2. However, the edge 311 of the first side sheet 31 and / or the edge 321 of the second side sheet 32 may be a fixed edge fixed to the top sheet 2.

Free edge 311 and second side free edge 321 of the sheet of the first side sheet may prevent the momentum of the liquid excrements flowing out from the central region R ₁ in the width direction Y. For this reason, the liquid excretion that has flowed out in the width direction Y from the central region R ₁ is less likely to leak beyond the free edge of the first side sheet 31 and the free edge 321 of the second side sheet. Therefore, the sanitary napkin 1 can prevent leakage of liquid excrement flowing out from the central region R _{1 in the} width direction Y from the sanitary napkin 1.

In the second surface S ₁₂ , the first adhesive portion 81 and the second adhesive portion 82 are respectively in an area corresponding to the surface of the first wing portion 11 and an area corresponding to the surface of the second wing portion 12. Is provided. Furthermore, a third adhesive portion 83 is provided in a region corresponding to the surface of the main body portion 10 in the second surface S ₁₂ . However, the 1st adhesion part 81, the 2nd adhesion part 82, and the 3rd adhesion part 83 are omissible.

  The first adhesive portion 81 and the second adhesive portion 82 are folded back when the first wing portion 11 and the second wing 12 are folded back to the non-skin contact surface side of the crotch portion of the underwear, respectively. 11 and the 2nd wing part 12 are fixed to the non-skin contact surface of the crotch part of underwear. The 3rd adhesion part 73 fixes main part 10 to the skin contact surface of the crotch part of underwear, when main part 10 is installed in the skin contact surface of the crotch part of underwear. Thereby, the shift | offset | difference of the sanitary napkin 1 at the time of wear is prevented.

The first adhesive part 81 to the third adhesive part 83 are adhesive layers formed by applying an adhesive in a planar shape to a predetermined region of the second surface S ₁₂ of the sanitary napkin 1.

Coating pattern of the adhesive in the predetermined area of the second surface S ₁₂ of the sanitary napkin 1 is not limited to the planar. Adhesive only needs to be present in continuous or discontinuous on the contour line of a predetermined area of the second surface S _12, the said predetermined region, a portion where the pressure-sensitive adhesive is not present may also be present. For example, one or more of the first adhesive part 81 to the third adhesive part 83 may be formed by a plurality of adhesive lines extending in the length direction X or the width direction Y. Examples of the shape of the pressure-sensitive adhesive line include a linear shape, a spiral shape, and an omega shape.

FIG. 6A is a plan view showing an embodiment in which the first adhesive portion 81 is formed by a plurality of adhesive lines extending in the length direction X, and FIG. It is a top view which shows one Embodiment in which the adhesion part 81 is formed of the multiple line | wire adhesive line line extended in the width direction Y. FIG. The description regarding the first adhesive portion 81 based on FIG. 6 is also applied to the second adhesive portion 82 and the third adhesive portion 83. When the first adhesive portion 81 is formed by a plurality of adhesive lines extending in the length direction X (FIG. 6A), the two adhesive lines AL ₁ and AL located at both ends in the width direction Y are used. ₂ and a straight line connecting the end points LT ₁ of each adhesive line located on one side in the length direction X, and a straight line connecting the end points LT ₂ of each adhesive located on the other side in the length direction X The contour line of one adhesive part 81 (the contour line of the area where the adhesive is applied) is defined. When the end point LT ₁ is not on a straight line, the two adjacent end points LT ₁ may be connected by a straight line. The same applies when the end point LT ₂ is not on a straight line. When the adhesive is applied as a plurality of lines extending in the width direction Y (FIG. 6B), the two adhesive lines BL ₁ and BL ₂ located at both ends of the length direction X and the width by the straight line connecting the straight line connecting the end points LT ₃ of each pressure-sensitive adhesive line located on one side of the direction Y, the endpoints LT ₄ of the pressure-sensitive adhesive located on the other side in the width direction Y, the outline of the first adhesive portion 81 A line (the outline of the area where the adhesive has been applied) is defined. When the end point LT ₃ is not on a straight line, the two adjacent end points LT ₃ may be connected by a straight line. The same applies when the end point LT ₄ is not on a straight line.

  The sanitary napkin 1 has a pressing part 9 that integrates the top sheet 2 and the absorbent body 5 in the thickness direction Z. However, the pressing part 9 can be omitted.

The pressing part 9 is a pressing groove formed in the central region R ₁ of the first surface S ₁₁ of the sanitary napkin 1 by heat embossing. The central region R ₁ of the first surface S _{11 is} a region where a wearer's excretion opening (for example, small labia, large labia, etc.) abuts and liquid excretion excreted from the wearer is mainly supplied.

Hereinafter, with reference to FIG. 7, illustrating a region in the first surface S ₁ of the sanitary napkin 1. Each area shown in FIG. 7 is a virtual area, and a line demarcating each area is indicated by a virtual line.

The central region R ₁ includes a region R ₁₁ that overlaps the absorber 5 in the thickness direction Z (hereinafter referred to as “first overlap region R ₁₁ ”) and a region R ₁₂ that does not overlap the absorber 5 in the thickness direction Z (hereinafter “ First non-overlapping region R ₁₂ ”). The first non-overlapping region R ₁₂ is located around the first overlapping region R _11.

The first adjacent region R ₂ includes a region R ₂₁ that overlaps the top sheet 2 in the thickness direction Z (hereinafter referred to as “second overlap region R ₂₁ ”), and a region R ₂₂ that does not overlap the top sheet 2 in the thickness direction Z ( Hereinafter referred to as “second non-overlapping region R ₂₂ ”). Of the first surface S ₃₁₁ of the first side sheet 31, the region corresponding to the surface of the first portion 311 and the region corresponding to the surface of the second portion 312 are respectively the second overlapping region R ₂₁ and the second non-overlapping. corresponding to the region R _22.

The second adjacent region R ₃ includes a region R ₃₁ that overlaps the top sheet 2 in the thickness direction Z (hereinafter referred to as “third overlapping region R ₃₁ ”), and a region R ₃₂ that does not overlap the top sheet 2 in the thickness direction Z ( Hereinafter, “third non-overlapping region R ₃₂ ”) is included. Of the first surface S ₃₂₁ of the second side sheet 31, a region corresponding to the surface of the first portion 321 and a region corresponding to the surface of the second portion 322 are the third overlap region R ₃₁ and the third non-overlap, respectively. corresponding to the region R _32.

The first adjacent region R ₂ has a region R ₂₃ that overlaps the first adhesive portion 81 in the thickness direction Z (hereinafter referred to as “fourth overlap region R ₂₃ ”), and the second adjacent region R ₃ has a thickness direction. Z has a region R ₃₃ overlapping with the second adhesive portion 82 (hereinafter referred to as “fifth overlapping region R ₃₃ ”). The fourth overlapping regions R _23, of the first adjacent region R ₂ located in the second non-overlapping regions R _22, fifth overlapping region R _33, the third non-overlapping region R of the second adjacent region R ₃ Located in ₃₂ .

In plan view (that is, a plane perpendicular to the thickness direction Z on which the first overlapping region R ₁₁ , the second overlapping region R _21, and the third overlapping region R ₃₁ are projected), the second overlapping region R ₂₁ and the third overlapping region R ₂₁ overlap region R ₃₁ is spaced in the width direction Y with respect to the first overlapping region R _11. That is, since the first side sheet 31 and the second side sheet 32 do not overlap the absorbent body 5 in the thickness direction Z, the transition of the liquid excrement supplied to the sanitary napkin 1 to the absorbent body 5 is the first. The side sheet 31 and the second side sheet 32 are not easily disturbed. Therefore, the sanitary napkin 1 prevents leakage of liquid excretion from the sanitary napkin 1 due to the first side sheet 31 and the second side sheet 32 overlapping the absorber 5 in the thickness direction Z. Can do.

In this embodiment, both the second overlapping region R ₂₁ and the third overlapping regions R ₃₁ is located at a distance in the width direction Y with respect to the first overlapping region R _11, and a second overlap area R ₂₁ It suffices that at least one of the third overlapping regions R ₃₁ is positioned at an interval in the width direction Y with respect to the first overlapping region R ₁₁ .

In the present embodiment, the second overlapping region R ₂₁ is located at a distance D ₁ in the width direction Y with respect to the first overlapping region R ₁₁ , and the third overlapping region R ₃₁ is located in the first overlapping region R ₁₁ . Situated at intervals D ₂ in the width direction Y against.

The interval D ₁ is equal to the virtual line VL ₁ extending in the length direction X through the point closest to the second overlap region R ₂₁ among the points on the contour line of the first overlap region R ₁₁ , and the second overlap. This is the distance from the virtual straight line VL ₂ extending in the length direction X through the point located closest to the first overlapping region R ₁₁ among the points on the contour line of the region R ₂₁ . The interval D ₂ is equal to the virtual line VL ₃ extending in the length direction X through the point closest to the third overlap region R ₃₁ among the points on the contour line of the first overlap region R ₁₁ , and the third overlap. This is the distance from the imaginary straight line VL ₄ extending in the length direction X through the point located closest to the first overlapping region R ₁₁ among the points on the contour line of the region R ₃₁ . In the present embodiment, both end edges in the width direction Y of the first overlapping region R ₁₁ extend substantially linearly in the length direction X, and therefore coincide with the virtual straight lines VL ₁ and VL ₃ . The inner edge of the end edges in the width direction Y of the second overlapping region R ₂₁ Since extends substantially linearly in the longitudinal direction X, it coincides with a virtual straight line VL _2. The inner edge of the width direction of both edges of the third overlapping regions R ₃₁ Since extends substantially linearly in the longitudinal direction X, matching the virtual straight line VL _4.

The distances D ₁ and D ₂ are preferably equal to or less than the thickness of the absorber 5. In addition, the thickness of the absorber 5 is 1-10 mm normally, Preferably it is 1.5-7 mm, More preferably, it is 2-5 mm. The lower limit value of the distances D ₁ and D ₂ is not particularly limited, but the distances D ₁ and D ₂ are preferably 1 mm or more, and more preferably 3 mm or more.

The force toward the inside in the width direction Y which is applied to the sanitary napkin 1, the first surface S ₁₁ of the sanitary napkin 1 is bent in the valley fold at both edges in the width direction Y of the first overlapping region R ₁₁ Further, the inner edge (central region R ₁ ) and the inner edge (central region R ₁ side) of both end edges in the width direction Y of the second overlapping region R ₂₁ and the both end edges in the width direction Y of the third overlapping region R _31. There is a case that it is folded into a mountain fold at the edge of ₁ side. In this case, the distance between the first overlapping region R ₁₁ and the second overlapping region R _21, and the interval between the first overlapping region R ₁₁ and the third overlapping regions R ₃₁ is, when greater than the thickness of the absorbent body 5, By the deformation of the region between the first overlapping region R ₁₁ and the second overlapping region R ₂₁ and the deformation of the region between the first overlapping region R ₁₁ and the third overlapping region R ₃₁ , the second overlapping region R ₂₁ and the third overlapping region R ₃₁ may overlap with the first overlapping region R _{11 in} the thickness direction Z (that is, the first side sheet 31 and the second side sheet 32 overlap with the absorber 5 in the thickness direction Z). There is. In this regard, in the sanitary napkin 1, the distance between the first overlapping region R ₁₁ and the second overlapping region R _21, and, the distance between the first overlapping region R ₁₁ and the third overlapping regions R _31, the absorber 5 Below the thickness. Therefore, even if a force toward the inside in the width direction Y is applied to the sanitary napkin 1, the first side sheet 31 and the second side sheet 32 are unlikely to overlap the absorbent body 5 in the thickness direction Z.

The opening 60 of the liquid permeable hole 6 formed in the first side sheet 31 is located between the second overlapping region R ₂₁ and the fourth overlapping region R ₂₃ . In other words, the opening 60 of the liquid permeable hole 6 formed in the first side sheet 31 has an end edge on the fourth overlapping region R ₂₃ side out of both end edges in the width direction Y of the second overlapping region R ₂₁ , A virtual straight line VL exists between the point on the contour line of the overlapping region R _{23 and} the virtual straight line VL ₅ that passes through the point closest to the second overlapping region R ₂₁ and extends in the length direction X. There is no outer side in the width direction Y than ₅ . However, such conditions are not essential for the absorbent article of the present invention. The absorbent article of the present invention includes an embodiment in which the opening 60 of the liquid permeable hole 6 formed in the first side sheet 31 is also present outside the virtual straight line VL _{5 in the} width direction Y. In this embodiment, the inner edge of the end edges of the fourth overlapping regions R ₂₃ Since extends substantially linearly in the longitudinal direction X, it coincides with a virtual straight line VL _5.

The opening 60 of the liquid permeable hole 6 formed in the second side sheet 32 is located between the third overlapping region R ₃₁ and the fifth overlapping region R ₃₃ . In other words, the opening 60 of the liquid permeable hole 6 formed in the second side sheet 32 has an end edge on the fifth overlapping region R ₃₃ side among the both end edges in the width direction Y of the third overlapping region R ₃₁ , A virtual straight line VL exists between the point on the contour line of the overlapping region R _{33 and} the virtual straight line VL ₆ that passes through the point closest to the third overlapping region R ₃₁ and extends in the length direction X. There is no outer side in the width direction than ₆ . However, such conditions are not essential for the absorbent article of the present invention. The absorbent article of the present invention includes an embodiment in which the opening 60 of the liquid permeable hole 6 formed in the second side sheet 32 is also present outside the imaginary straight line VL _{6 in the} width direction Y. In this embodiment, the inner edge of the end edges of the fifth overlapping region R ₃₃ Since extends substantially linearly in the longitudinal direction X, it coincides with a virtual straight line VL _6.

In the sanitary napkin 1, virtual straight line VL ₅ and VL ₆ is likely to be the folding line when the first wing portion 11 and the second wing portion 12 is folded back to the non-skin contact surface side of the crotch portion of the undergarment. When the 1st wing part 11 and the 2nd wing part 12 are turned up by these virtual straight lines, although the part located in the width direction Y outside these virtual straight lines is located in a wearer's clothing side, these parts Does not have the opening 60 of the liquid permeation hole 6. Therefore, even if the liquid excretion that has permeated through the top sheet 2 spreads in the width direction Y inside the sanitary napkin 1, the liquid excretion hardly oozes out from these portions. Moreover, since the opening part 60 of the liquid permeation hole 6 does not exist in these parts, the intensity | strength of the part which forms the 1st wing part 11 and the 2nd wing part 12 among the 1st side sheet 31 and the 2nd side sheet 32 is high. It will be enough. Therefore, when the first wing part 11 and the second wing part 12 are fixed to the non-skin contact surface of the crotch part of the underwear by the first adhesive part 81 and the second adhesive part 82, the first adhesive part 81 and the second wing part 12 The effect of preventing the sanitary napkin 1 from being displaced by the adhesive portion 82 is easily exhibited.

1 Sanitary napkin (an example of an absorbent article)
DESCRIPTION OF SYMBOLS 10 Main-body part 11 1st wing part 12 2nd wing part 2 Top sheet 31 1st side sheet 32 2nd side sheet 4 Back sheet 5 Absorber 6 Liquid permeation hole 60 Opening part of liquid permeation hole 71 1st junction part 72 1st 2 junction 81 the second surface of the first adhesive portion 82 the second adhesive portion 83 the third first surface S ₁₂ the sanitary napkin of the adhesive portion 9 compressions X longitudinal direction Y transverse direction Z thickness direction S ₁₁ the sanitary napkin R ₁ central region R ₂ first adjacent region R ₃ second adjacent region R ₁₁ first overlapping region R ₂₁ second overlapping region R ₃₁ third overlapping region R ₂₃ fourth overlapping region R ₃₃ fifth overlapping region

Claims (8)

An absorbent article having a length direction, a width direction, and a thickness direction orthogonal to each other, a first surface located on one side of the thickness direction, and a second surface located on the other side of the thickness direction. There,
The first surface is adjacent to the central region extending in the length direction, a first adjacent region adjacent to the central region on one side in the width direction, and the central region on the other side in the width direction. A second adjacent region,
The absorbent article includes a liquid-permeable top sheet that forms the central region, a liquid-repellent first side sheet that forms the first adjacent region, and a liquid-repellent material that forms the second adjacent region. A second side sheet, a liquid-impermeable back sheet that forms the second surface, and a liquid-absorbing absorber provided between the top sheet and the back sheet,
The central region has a first overlapping region that overlaps the absorber in the thickness direction,
The first adjacent region has a second overlapping region that overlaps the top sheet in the thickness direction,
The second adjacent region has a third overlapping region that overlaps the top sheet in the thickness direction,
At least one of the second overlapping region and the third overlapping region is located at an interval in the width direction with respect to the first overlapping region ,
Furthermore, the absorbent article includes a main body, a first wing extending from the main body to the one side in the width direction, and a second wing extending from the main body to the other side in the width direction. And
The first adjacent region has a region corresponding to the surface of the first wing part,
The second adjacent region has a region corresponding to the surface of the second wing part,
The second surface has a region corresponding to the surface of the first wing portion and a region corresponding to the surface of the second wing portion,
Of the second surface, a region corresponding to the surface of the first wing portion and a region corresponding to the surface of the second wing portion are provided with a first adhesive portion and a second adhesive portion, respectively.
In the first side sheet, a plurality of liquid permeable holes having openings in the first adjacent region are formed,
Wherein the second side sheet, a plurality of liquid passage holes having openings in the second adjacent regions that have been formed, the absorbent article.   The absorptive article according to claim 1 in which said interval is below the thickness of said absorber.   The absorbent article is a first joint that joins the top sheet and the first side sheet, the first joint located in the second overlapping region, and / or the top sheet. The absorptive article according to claim 1 or 2 which is the 2nd joined part which joins said 2nd side sheet, and has said 2nd joined part located in said 3rd overlap field.   Of the both end edges in the width direction of the first side sheet, the edge on the center area side, and / or the edge on the center area side of the both end edges in the width direction of the second side sheet, The absorptive article according to claim 3 which is a free edge which is not fixed to a top sheet.   The absorbent article according to any one of claims 1 to 4, wherein both the second overlapping region and the third overlapping region are located at an interval in the width direction with respect to the first overlapping region. . The liquid permeable hole formed in the first side sheet is a recess formed in the first side sheet, and a part of an inner peripheral surface forming the recess has a thickness of the first side sheet. The recess being separated from the first adjacent region by a slit penetrating in a direction;
The liquid permeation hole formed in the second side sheet is a recess formed in the second side sheet, and a part of an inner peripheral surface forming the recess has a thickness of the second side sheet. The absorbent article as described in any one of Claims 1-5 which is the said recessed part divided | segmented from the said 2nd adjacent area | region by the slit penetrated in the direction. The absorbent article according to claim 6 , wherein the slit extends in the length direction. The first adjacent region has a fourth overlapping region that overlaps the first adhesive portion in the thickness direction,
The second adjacent region has a fifth overlapping region that overlaps the second adhesive portion in the thickness direction,
An opening of the liquid permeable hole formed in the first side sheet is located between the second overlapping region and the fourth overlapping region,
The opening of the liquid permeable hole formed in the second side sheet is located between the third overlapping region and the fifth overlapping region, according to any one of claims 1 to 7 . Absorbent article.

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