JP5960791B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article.

Conventionally, an hourglass-shaped exterior body that extends from the abdominal side portion disposed on the wearer's ventral side, the crotch portion disposed on the wearer's crotch portion, and the back side portion disposed on the wearer's back side, and the exterior An absorptive main body fixed to the inner surface side of the body, and both side edges of the exterior body on the abdominal side and both side edges of the exterior body on the back side are joined together to form a pair of side seal portions and a waist opening A pants-type absorbent article in which a part and a pair of leg openings are formed is known.
In addition, as a conventional pant-type absorbent article, the exterior body is divided into an abdominal sheet member disposed on the wearer's belly side and a back sheet member disposed on the wearer's back side, The absorptive main body is fixed so as to span the abdominal seat member and the back seat member, and the left and right side edges of the abdominal seat member and the left and right side edges of the back side seat member are a pair of sides. A pants-type absorbent article of a front and rear divided type that is joined at a seal portion is known (see, for example, Patent Document 1).

  In addition, in order to prevent leakage from the leg opening in the pant-type absorbent article, a technique for providing a leak-proof cuff standing on the skin side of the wearer at the crotch is known. It is also known that a double leak-proof cuff is provided for each (see Patent Documents 2 and 3).

JP 2014-195631 A JP 2006-341061 A JP 2012-61138 A

When the weight of the crotch part is increased by liquid absorption, the crotch part hangs down and the gap between the leg circumference of the wearer and the leg opening is reduced. It becomes easy to occur, and it becomes easy to produce a leak, or even if it does not produce a leak, it gives anxiety to the leak.
In order to prevent gaps from occurring around the legs, the width of the crotch can be widened, but in that case, the ease of passing the leg through the leg opening is reduced, and the crotch tends to be uncomfortable. Become.
In Patent Document 1, a crotch panel that is bridged and fixed between a front panel and a rear panel is provided with a leg fluid flap that extends along the body fluid absorbing portion and the body fluid absorbing portion, and has an outer region and an inner region, A pants-type diaper is described in which a leg-hole elastic member is arranged in the outer region. In addition, in addition to the leg flaps on which the leg elastic members are arranged, it is described that a leak-proof wall that can stand up toward the wearer's skin is formed on the inner surface of the crotch panel. However, in Patent Document 1, the distance between the base edge portion of the leakage breaker and the free edge portion is not allowed to exceed the distance from the proximal edge on the body fluid absorbing portion side to the outer side area in the leg-wrapping flap. (Refer to claim 7 and FIG. 6), in that case, the leg can easily pass through the leg opening, but the height of the breakwater cannot be secured sufficiently, It cannot be said that it is sufficient in terms of preventing leaks and not giving anxiety about leaks.

  In addition, when the techniques of Patent Documents 2 and 3 are applied to a pants-type absorbent article of an exterior body division type, it is possible to prevent the leg from being easily passed through the leg opening and the anxiety about leakage from the legs and leakage. It cannot be said that it is sufficient from the viewpoint of achieving both.

  Therefore, the subject of this invention is providing the underpants type absorbent article which can eliminate the fault which the prior art mentioned above has.

The present invention is fixed over the abdominal sheet member disposed on the abdomen side of the wearer, the dorsal sheet member disposed on the dorsal side of the wearer, and the abdomen sheet member and the dorsal sheet member. A pants-type absorbent article comprising a vertically long absorbent main body and having a pair of side seal portions, a waist opening portion and a pair of leg openings formed by joining a ventral seat member and a back seat member. The absorbent main body has a surface sheet that forms a liquid absorption surface and a liquid-retaining absorbent, and the free ends are located inward from the side edges of the absorbent on each side in the longitudinal direction. A first leak-proof cuff and a second leak-proof cuff extending outward from the side edge of the absorber, and the top sheet and the first leak-proof cuff are provided on both side edges of the absorber. The outer side has a folded portion that is folded back from the skin facing surface side to the non-skin facing surface side of the absorber. The sheet material forming the first leak-proof cuff includes an upper fixing portion and a lower fixing portion fixed to the top sheet at positions spaced inward in the width direction from both side edges of the absorber on the non-skin facing surface side of the absorber. A lower fixing portion fixed to the seat, the length from the folded portion of the first leak-proof cuff to the free end is L1, and the second leak-proof cuff in the first leak-proof cuff from the folded portion of the first leak-proof cuff 2 The length to the free end of the leak-proof cuff is L2, the distance between the folded portion of the first leak-proof cuff and the lower fixed portion is L3, and the distance between the folded portion of the top sheet and the upper fixed portion is A pant-type absorbent article that satisfies all of the following relational expressions (1) to (4) when L4 is provided is provided.
(1) L1 ≦ L2
(2) L2 ≦ L1 + L3
(3) L3 ≦ L4
(4) L4 ≦ L1 + L3

  According to the pants-type wearing article of the present invention, it is possible to prevent leakage due to a gap around the leg and appearance anxiety with respect to the leakage while maintaining good ease of wearing and a feeling of wearing.

FIG. 1 is a perspective view showing a usage state (wearing state) of a pants-type disposable diaper according to an embodiment of the present invention. FIG. 2 is a partially broken plan view showing a developed and extended state of the pants-type disposable diaper shown in FIG. In the expanded and extended state, the joints (side seal portions) existing on both sides of the diaper are peeled off to make the pant-type absorbent article in the expanded state, and the expanded absorbent article is stretched with the elastic members in each part. It is a state where it is expanded to the design dimension (same as the dimension when it is expanded in a flat shape with no influence of the elastic member). 3 is an enlarged sectional view taken along line III-III in FIG. 4 is a cross-sectional view of the main part showing a cross section along the article lateral direction at the position of the arrow Pa in FIG. Drawing 5 is a top view of an absorptive core showing a variation of a formation mode of a side part non-stacking part.

Hereinafter, the underpants type absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings.
A pants-type disposable diaper 1 (hereinafter, also referred to as “diaper 1”) according to an embodiment of the present invention, as shown in FIG. 1 and FIG. And a back side sheet member 2B arranged on the back side of the wearer, and a vertically long absorbent main body 3 that is fixed over the abdomen side sheet member 2A and the back side sheet member 2B. The pants-type disposable diaper in which the member 2A and the back seat member 2B are joined to form a pair of side seal portions 4, 4, a waist opening 5, and a pair of leg openings 6, 6.
As shown in FIG. 1 and FIG. 2, the diaper 1 is, when worn, an abdominal side A disposed on the abdomen side of the wearer, a dorsal side B disposed on the back side of the wearer, and an abdomen side part. It has a crotch part C which is located between A and the back side part B and is arranged in a wearer's crotch part.
Further, the side seal part of the diaper 1 is obtained by joining the side edges 2a, 2a of the abdominal sheet member 2A and the side edges 2b, 2b of the back sheet member 2B by a known joining method such as heat sealing. Is formed.

  The diaper 1 has an article longitudinal direction X and an article transverse direction Y. The article longitudinal direction X is a direction corresponding to the wearer's front-rear direction in a pants-type absorbent article such as a diaper, and the article lateral direction Y is a pants-type absorbent article such as a diaper in the wearer's front-rear direction. The direction is orthogonal to the corresponding direction. In the diaper 1, the article longitudinal direction X is a direction extending from the abdominal part A through the crotch C to the dorsal part B as indicated by X in FIG. 2, and the article lateral direction Y is shown in FIG. 2. As indicated by Y, it is the direction orthogonal to the article longitudinal direction X in the expanded and extended state.

  In the present specification, the skin facing surface is a surface of the absorbent article or a component thereof that faces the wearer's skin when the absorbent article is worn, and the non-skin facing surface is the absorbent article or a component thereof. It is a surface directed to the opposite side (clothing side) from the skin side when the absorbent article is worn.

  The diaper 1 will be described in more detail. In the ventral sheet member 2A, the length La in the article longitudinal direction X is the same as the length LS in the same direction of the side seal portion 4, and the ventral sheet member 2A is While it has the main-body part 20a which has the side seal parts 4 and 4 on both right and left sides, it does not have the extension part extended to the crotch C side from the main-body part 20a. On the other hand, the length Lb of the article longitudinal direction X of the back side seat member 2B is longer than the length LS of the side seal part 4 in the same direction, thereby the main body part 20b having the side seal parts 4 and 4 on both the left and right sides. And the extension part 21b which does not have the side seal parts 4 and 4 is formed in the crotch part C side from the main-body part 20b, and the right-and-left both sides. Hereinafter, the body part 20a of the abdominal sheet member 2A is also referred to as the abdominal body part 20a, and the body part 20b and the extension part 21b of the back sheet member 2B are referred to as the back side body part 20b and the back side extension part 21b. Say.

  The ventral sheet member 2A and the dorsal sheet member 2B in the diaper 1 each have a rectangular shape in plan view as shown in FIG. 2, and more specifically, the article is longer than the length in the article longitudinal direction X. It is a rectangular shape with a long length in the lateral direction Y.

  As shown in FIG. 4, the ventral sheet member 2 </ b> A and the back sheet member 2 </ b> B in the diaper 1 are both an outer layer sheet 22 that forms the outer surface of the diaper, and an inner layer sheet 23 that is disposed on the skin facing surface side of the outer layer sheet 22. And a plurality of thread-like elastic members 24 that are spaced apart in the longitudinal direction X of the article between the sheets 22 and 23. As shown in FIG. It has the expansion-contraction part G1 and the trunk periphery expansion-contraction part G2, and the back | dorsal sheet member 2B has the waist expansion-contraction part G1, the trunk periphery expansion-contraction part G2, and the extension part expansion-contraction part G3.

The waist stretchable part G1, the waistline stretchable part G2, and the extended part stretchable part G3 exhibit elastic stretchability by contraction of the elastic member 24 arranged in an extended state between the two sheets 22 and 23.
The waist stretchable part G1 is formed outward from the longitudinal end of the absorbent main body 3 in the article longitudinal direction X in each of the ventral sheet member 2A and the back sheet member 2B. The waistline elastic part G2 is formed on the crotch part C side of the waist elastic part G1 in the article longitudinal direction X in each of the abdominal sheet member 2A and the back sheet member 2B. The extension part elastic part G3 is formed in the back side extension part 21b. Each of the waist stretchable part G1, the waistline stretchable part G2, and the extended part stretchable part G3 may exhibit stretchability at least in a portion located outward from both side edges of the absorbent body 33 in the article lateral direction Y. preferable.
Further, the elastic member 24 forming the waist elastic part G2 and / or the extending part elastic part G3 loses the elasticity of the elastic member by heat treatment or the like at the part overlapping the central part in the width direction of the absorber 33, or elastically It is preferable that the elastic member 24 does not impart stretchability to the abdominal sheet member 2A and the back sheet member 2B in the portion, for example, by cutting the member.

The two sheets 22 and 23 constituting the abdominal sheet member 2A and the back sheet member 2B may be fixed with an adhesive in substantially the entire area of each of the abdominal sheet member 2A and the back sheet member 2B. It is good, and it is joined at a large number of joints formed in a dotted shape so as not to pass through the elastic member 24, as between two sheet materials in the elastic stretchable member described in JP-A-2005-80859. May be.
The ventral sheet member 2A and the dorsal sheet member 2B in the diaper 1 are such that the outer layer sheet 22 is folded back to the inner layer sheet 23 side at the waist end 51 forming the opening peripheral edge of the waist opening 5. The covered portion covers the skin facing surface side of the longitudinal end of the absorbent main body 3, and the portion overlapping the absorbent main body 3 is the skin of the top sheet 31 and the sheet material 35 for forming the first leak-proof cuff. It is joined to the opposite surface.

  As shown in FIG. 3, the absorbent main body 3 of the diaper 1 is interposed between a liquid permeable top sheet 31 that forms a liquid absorbing surface, a liquid permeable back sheet 32, and both sheets 31 and 32. In addition, as shown in FIG. 1, it has a long shape in the longitudinal direction X of the article. The absorbent body 33 is an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core 33a in which water-absorbing polymer particles are held, and a core wrap that covers the absorbent core 33a. It consists of a sheet 33b. In the absorbent body 33, the side non-stacked portion 33c in which the absorbent core forming material does not exist or the basis weight of the formed material is smaller than the other portions on both sides of the longitudinal center line of the absorbent core 33a. have. Moreover, the center part of the width direction of the absorptive core 33a has the center non-stacking part 33d in which the forming material of an absorptive core does not exist, or the basic weight of this forming material is less than other parts. The absorbent body 33 also has a shape that is long in the longitudinal direction X of the article.

  The absorbent main body 3 absorbs from the first leak-proof cuff 34 in which the free end 34 a is located inward of the side edge 33 s of the absorbent body 33 and the side edge 33 s of the absorbent body 33 on both sides in the longitudinal direction. The main body 3 has a second leak-proof cuff 37 extending outward in the width direction. The longitudinal direction of the absorbent main body 3 is the same as the longitudinal direction of the article, and the width direction of the absorbent main body 3 is the same as the article width direction. The width direction of the main body 3 is also referred to as the width direction Y. The free end 34a of the first leak-proof cuff 34 only needs to be positioned inward from the side edge 33s of the absorbent body 33 at least in the expanded and extended state shown in FIG. Further, the second leak-proof cuff 37 only needs to extend outward from the side edge 33s of the absorbent body 33 in the expanded and extended state shown in FIG.

  The first leak-proof cuff 34 includes a liquid-resistant or water-repellent sheet material 35 and an elastic member 36 for forming a first leak-proof cuff fixed to the sheet material 35. In the diaper 1 of the present embodiment, the sheet material 35 forming the first leak-proof cuff 34 is a portion in which one sheet is folded in two at the free end 34a of the first leak-proof cuff 34 to form a two-layer structure. The elastic member 36 for forming the first leakage prevention cuff is fixed between the layers of the two-layer structure portion in the vicinity of the free end 37a of the first leakage prevention cuff 34 with an adhesive. Between the layers of the two-layer structure portion, the whole region may be bonded with an adhesive or the like, or may be partially bonded by an arbitrary method such as a pattern-coated adhesive.

As shown in FIG. 3, the surface sheet 31 in the diaper 1 is folded outwardly from both side edges 33 s of the absorbent body 33 from the skin facing surface side to the non-skin facing surface side of the absorbent body 33. have. More specifically, the top sheet 31 is a rectangular sheet that is long in the same direction as the longitudinal direction of the absorbent main body 3, and the central region located in the center in the width direction Y of the absorbent main body 3 is the skin of the absorbent body 33. Positioned on the facing surface side, end regions on both sides sandwiching the central region are wound down to the non-skin facing surface side of the absorbent body 33.
Further, as shown in FIG. 3, the first leak-proof cuff 34 is also folded outward from both side edges 33 s of the absorbent body 33 from the skin facing surface side to the non-skin facing surface side of the absorbent body 33. 34c. More specifically, the top sheet 31 folded back so as to cover the side portion of the absorbent body 33 is folded back so as to cover from the outside.
The folded portion 31c of the topsheet 31 and the folded portion 34c of the first leak-proof cuff 34 may both be portions formed by being bent in a circular arc shape as shown in FIG.

  The sheet material 35 forming the first leak-proof cuff 34 is located at a position spaced inward in the width direction Y of the absorbent main body 3 from both side edges 33s of the absorbent body 33 on the non-skin facing surface side of the absorbent body 33. It has the upper side fixing | fixed part 35u fixed to the surface sheet 31 wound down by the non-skin opposing surface side of the absorber 33. As shown in FIG. In addition, the sheet material 35 forming the first leak-proof cuff 34 is located away from both side edges 33 s of the absorbent body 33 on the non-skin facing surface side of the absorbent body 33 inward in the width direction Y of the absorbent main body 3. In addition, a lower fixing portion 35 d fixed to the back sheet 32 is provided. An end portion on the outer side in the width direction of the lower fixing portion 35 d is a base end portion 34 d of the first leak-proof cuff 34. In the diaper 1, the back sheet 32 is the “lower sheet” in the present invention. In the thickness direction of the pants-type absorbent article such as the diaper 1, the lower sheet is a part of the sheet material 35 that forms the first leak-proof cuff 34 than the portion located on the non-skin facing surface side of the absorbent body 33. It is a sheet | seat located in the outer surface side (lower side in FIG. 3) of an underpants type absorbent article.

  In the diaper 1 of the present embodiment, the back sheet 32 has a rectangular shape in plan view with the longitudinal direction of the absorbent main body 3 as the long side, and as shown in FIG. The first leakage preventing cuff 34 extends outward in the width direction Y from the folded portion 34a. Further, the back sheet 32 extends from both ends 33 a and 33 b of the absorbent body 33 in the longitudinal direction X of the absorbent main body 3.

  As shown in FIG. 4, the absorbent main body 3 has a portion overlapping the ventral sheet member 2 </ b> A joined to the ventral sheet member 2 </ b> A by an optional joining means such as an adhesive. The end of 37 is also joined on the ventral sheet member 2A. The portion overlapping the back sheet member 2B is the same, and is joined onto the back sheet member 2B by any joining means such as an adhesive, and the end of the second leak-proof cuff 37 is also connected to the back sheet member. It is joined on 2B. Moreover, in the longitudinal direction edge part of the absorptive main body 3, the surface located in the skin opposing surface side of the absorber 33 in the state which the 1st leak-proof cuff 34 laid down in the width direction inner side of the absorptive main body Bonded on the sheet 31. As a method for fixing the absorbent main body 3, an adhesive such as a hot melt adhesive can be used, but instead of the adhesive or together with the adhesive, any other optional heat seal, ultrasonic seal, etc. A joining method can also be used.

  In the diaper 1 shown in FIG. 3, the sheet material 35 forming the first leak-proof cuff 34 is joined to the top sheet 31 and the back sheet 32 via the adhesive 9, thereby the upper fixing portion. 35u and a lower fixing portion 35d are formed. As a fixing method of the sheet material 35, other arbitrary joining methods such as heat sealing and ultrasonic sealing can be used instead of or together with the adhesive.

  The second leak-proof cuff 37 includes a liquid-resistant or water-repellent sheet material 38 and an elastic member 39 for forming a second leak-proof cuff fixed to the sheet material 38. In the diaper 1 of the present embodiment, the sheet material 38 forming the second leak-proof cuff 37 is a portion in which one sheet is folded in two at the free end 37a of the second leak-proof cuff 37 to form a two-layer structure. The elastic member 39 for forming the second leak-proof cuff is fixed between the layers of the two-layer structure portion in the vicinity of the free end 37a of the second leak-proof cuff 37 with an adhesive. Between the layers of the two-layer structure portion, the whole region may be bonded with an adhesive or the like, or may be partially bonded by an arbitrary method such as a pattern-coated adhesive.

As shown in FIG. 3, the second leak-proof cuff 37 in the diaper 1 includes a sheet material 38 that forms one second leak-proof cuff 37 and a sheet material 38 that forms the other second leak-proof cuff 37. , Consisting of one continuous sheet. Specifically, both sides of the rectangular sheet are folded back to the skin facing surface side to form a two-layer structure portion of a pair of left and right second leak-proof cuffs 37.
As shown in FIGS. 2 and 3, the sheet materials 38, 38 forming the second leak-proof cuff 37 are sheet materials different from the sheet material constituting the first leak-proof cuff, and the crotch portion of the diaper 1. It is joined via the adhesive 9 to the non-skin facing surface side of the back sheet 32 in C. The entire region may be joined between the sheet material 38 forming the second leak-proof cuff 37 and the back sheet 32 as the lower sheet, or may be partially formed by any method such as a pattern-coated adhesive. It may be joined to. As a joining method of the sheet material 38 forming the second leak-proof cuff 37 and the back sheet 32, any other joining method such as heat sealing, ultrasonic sealing or the like is used instead of or together with the adhesive. You can also The sheet material 38 forming the second leak-proof cuff 37 is a sheet material in which the sheet material forming one second leak-proof cuff 37 and the sheet material forming the other second leak-proof cuff 37 are separate. The separate sheet materials may be separated from each other, or a part thereof may overlap.

In the diaper 1 of the present embodiment, as shown in FIG. 3, the length from the folded portion 34 c of the first leakage prevention cuff 34 to the free end 34 a is L1, and the first leakage prevention cuff 34 in the second leakage prevention cuff 37. The length from the folded portion 34c to the free end of the second leak-proof cuff 37 is L2, the distance between the folded portion 34c of the first leak-proof cuff 34 and the lower fixing portion 35d is L3, and the top sheet 31 is folded. When the distance between the portion 31c and the upper fixing portion 35u is L4, all of the following relational expressions (1) to (4) are satisfied.
(1) L1 ≦ L2
(2) L2 ≦ L1 + L3
(3) L3 ≦ L4
(4) L4 ≦ L1 + L3
It is determined whether or not these relational expressions are satisfied in the expanded and expanded state shown in FIG. For example, the position of the folded portion 34c of the first leak-proof cuff 34 is such that the portion of the first leak-proof cuff 34 located on the skin facing surface side of the absorbent body is indicated by reference numeral 34 'in FIG. Decide in a state of lying on top. Further, the L1 to L4, the distance L5 and the full width L described later are all the length or distance measured along the article lateral direction Y, and the length between two points in a plan view of the unfolded and extended diaper. Measure the distance or distance. Moreover, these relational expressions should just satisfy | fill in the site | part where the distance L (refer FIG. 3) between the free ends 37a of the 2nd leak-proof cuff in the expansion | deployment and expansion | extension state is the minimum. Moreover, since the diaper 1 of this embodiment is formed symmetrically with respect to the longitudinal center line CL of the absorbent main body 3, the diaper 1 is mainly described on the left side with reference numerals such as L1 to L4. The right side has the same configuration.

  By satisfying the relational expression (1), the first leak-proof cuff 34 can be reliably covered with the second leak-proof cuff, and leakage from the crotch part can be prevented, and the first leak-proof cuff 34 from the crotch part can be prevented. It is possible to prevent anxiety about the appearance of mole due to the visible. In addition, since L1 ≦ L2, it is possible to eliminate the inconvenience that the foot is caught by the first leak-proof cuff 34 when the foot is passed through the leg opening.

  In addition, the top sheet 31 is wound around the non-skin facing surface side of the absorbent body 33, and the first leak-proof cuff 34 is located at a position away from the side edge of the absorbent body 33 on the non-skin facing surface side of the absorbent body 33. Since the upper fixing portion 35u to which the sheet material 35 and the surface sheet 31 are fixed is fixed, the side portion S of the absorbent body 33 is bent in the vicinity of the upper fixing portion 35u and easily rises toward the wearer's skin. In addition, by satisfying the relational expression (2), when the crotch part C hangs down due to absorption of liquid during wearing, the first leak-proof cuff 34 is folded from the base end 34b to the folded portion 34c. Stand up greatly including the part up to. Unlike the case where the length L1 of the first leak-proof cuff 34 is increased by satisfying both the relational expression (1) and the relational expression (2), the width between the first leak-proof cuffs 34 is The height of the first leak-proof cuff itself can be sufficiently secured while preventing the liquid absorption surface 30 from becoming narrow and narrowing. Therefore, even when the crotch part C hangs down due to liquid absorption during wearing, the state where the first leak-proof cuff 34 is in contact with the skin of the wearer is stably maintained, and a gap is generated around the leg. This prevents leakage. In addition, it is possible to prevent the guardian, the caregiver, and the person from feeling uneasy about leakage due to the gap.

  Furthermore, by satisfying the relational expression (3), the fit of the first leak-proof cuff 34 is also improved. That is, since the absorber end portion stands up, the first leak-proof cuff 34 can increase the standing property when it rises greatly including the portion from the base end portion 34b to the folded portion 34c. The effect that the state in which the leak-proof cuff 34 is in contact with the skin of the wearer is stably maintained can be further enhanced. Furthermore, the absorbent body can be covered with the first leak-proof cuff 34 by satisfying the relational expression (4). For this reason, it is possible to prevent the wearer's leg and the outer garment from being contaminated by the tip of the absorbent body to which excrement adheres from the tip of the first leak-proof cuff.

  In the diaper 1 of this embodiment, the elastic member 33e for raising the side portion is fixed between the side edge portion 33s of the absorber 33 and the surface sheet 31 that covers the side edge portion 33s. The side portion S of the absorber 33 is easily raised. The elastic member 33e may be joined to the core wrap sheet 33b, may be fixed to the top sheet 31 side, or may be joined to both. In addition, an intermediate elastic member 40 is disposed at a central portion between the free end 34 a and the base end portion 34 b in the first leak-proof cuff 34. Due to the presence of the intermediate elastic member 40, when the first leak-proof cuff 34 rises, the intermediate portion can easily keep a stable standing state, the intermediate portion bends unexpectedly, and the second portion when the intermediate leaks outward. It is possible to prevent leakage due to blocking the wearer's urination portion when protruding from the leak-proof cuff 34 or when folded inside.

In the diaper 1 of the present embodiment, as shown in FIG. 2, in the expanded and extended state, the elastic member 39c of one second leak-proof cuff 37 and the elastic member 39d of the other second leak-proof cuff 37 are mutually connected. They are arranged in parallel and extend in the longitudinal direction of the absorbent main body 3. In the conventional diaper having such a configuration, the crotch part C is likely to hang down relatively downward due to absorption of liquid. However, by adopting the configuration of the present invention, as described above, it is possible to prevent leakage and leakage. Anxiety can be effectively prevented.
In the diaper 1 of the present embodiment, the pair of left and right second leak-proof cuffs 37, 37 themselves are also formed in parallel with each other and extend in the longitudinal direction X of the absorbent main body. The pair of left and right first leak-proof cuffs 34, 34 are also formed in parallel with each other and extend in the longitudinal direction X of the absorbent main body.

From the viewpoint of more surely achieving one or more of the effects described above, it is preferable to satisfy the following relationship.
Regarding the relational expression (1), the ratio of L2 to L1 (the length L2 of the second leak-proof cuff 37 from the folded portion 34c of the first leak-proof cuff 34 to the free end of the second leak-proof cuff 37) / The length L1) of the first leak-proof cuff 34 from the folded portion 34c to the free end 34a is preferably 1.0 or more and 6.0 or less, and more preferably 1.2 or more and 4.0 or less. preferable.
For the relational expression (2), the ratio of the total length of L1 and L3 to L2 [(length L1 from the folded portion 34c of the first leakage prevention cuff 34 to the free end 34a + first prevention Distance L3 between the folded portion 34c of the leakage cuff 34 and the lower fixing portion 35d) / the length L2 from the folded portion 34c of the first leakage prevention cuff 34 to the free end of the second leakage prevention cuff 37] is 1 It is preferably 0.0 or more and 7.0 or less, and more preferably 1.2 or more and 4.0 or less.
As for the relational expression (3), the ratio of L4 to L3 (the distance L4 between the folded portion 31c of the topsheet 31 and the upper fixing portion 35u / the folded portion 34c and the lower side of the first leakage prevention cuff 34) The distance L3) between the fixed portion 35d is preferably 1.0 or more and 6.0 or less, and more preferably 1.2 or more and 4.0 or less.
For the relational expression (4), the ratio of the sum of L1 and L3 to the L4 [(length L1 from the folded portion 34c of the first leak-proof cuff 34 to the free end 34a + first leak-proof cuff) 34, the distance L3 between the folded portion 34c and the lower fixing portion 35d) / the distance L4 between the folded portion 31c and the upper fixing portion 35u of the topsheet 31] is 1.0 or more and 7.0 or less. It is more preferable that it is 1.2 or more and 4.0 or less.

Further, the length from the folded portion of the first leak-proof cuff to the free end, L1, the length from the folded portion of the first leak-proof cuff to the free end of the second leak-proof cuff in the second leak-proof cuff. The distance L3, which is the distance between the folded portion of the first leak-proof cuff and the lower fixing portion, and the distance L4, which is the distance between the folded portion of the topsheet and the upper fixed portion, From the same viewpoint, it is preferable that the ratio to the distance L between the free ends 37a of the second leak-proof cuff (hereinafter also referred to as the full width L of the absorbent main body 3) is in the following range.
The ratio of L1 to the total width L is preferably 5% or more, more preferably 8% or more, preferably 40% or less, more preferably 35% or less, and preferably 5% or more and 40% or less. More preferably, it is 8% or more and 35% or less. The L1 is preferably 10 mm or more, more preferably 15 mm or more, preferably 100 mm or less, more preferably 60 mm or less, and preferably 10 mm or more and 100 mm or less, more preferably 15 mm or more and 60 mm or less. .
The ratio of L2 to the total width L is preferably 5% or more, more preferably 8% or more, preferably 40% or less, more preferably 35% or less, and preferably 5% or more and 40% or less. More preferably, it is 8% or more and 35% or less. The L2 is preferably 10 mm or more, more preferably 15 mm or more, preferably 100 mm or less, more preferably 70 mm or less, and preferably 10 mm or more and 100 mm or less, more preferably 15 mm or more and 70 mm or less. .

  The ratio of L3 to the total width L is preferably 3% or more, more preferably 5% or more, preferably 40% or less, more preferably 35% or less, and preferably 3% or more and 40% or less. More preferably, it is 5% or more and 35% or less. The L3 is preferably 10 mm or more, more preferably 15 mm or more, preferably 80 mm or less, more preferably 60 mm or less, and preferably 10 mm or more and 80 mm or less, more preferably 15 mm or more and 60 mm or less. . The total length of L1 and L3 (L1 + L3) is preferably 10% or more, more preferably 20% or more, and preferably 80% or less, more preferably 60% or less, with respect to the total width L. Further, it is preferably 3% or more and 80% or less, more preferably 5% or more and 60% or less.

  The ratio of L4 to the total width L is preferably 3% or more, more preferably 5% or more, preferably 40% or less, more preferably 35% or less, and preferably 3% or more and 40% or less. More preferably, it is 5% or more and 35% or less. The L3 is preferably 10 mm or more, more preferably 15 mm or more, preferably 80 mm or less, more preferably 60 mm or less, and preferably 10 mm or more and 80 mm or less, more preferably 15 mm or more and 60 mm or less. .

In the diaper 1, the sheet material 38 forming the second leak-proof cuff 37 has a length L7 in the longitudinal direction X of the absorbent main body 3 as shown in FIG. It is shorter than L6. More specifically, in the sheet material 38 and the absorbent body 33 constituting the second leak-proof cuff 37, the end portions 38a, 33a on the ventral sheet member 2A side are both in detail on the ventral sheet member 2A. Is located on the main body portion 20a of the abdominal sheet member 2A, and the end portion 38a of the sheet material 38 is preferably terminated on the crotch C side with respect to the end portion 33a of the absorbent body 33.
Further, the sheet material 38 and the absorbent body 33 constituting the second leak-proof cuff 37 are such that the end portions 38b and 33b on the back sheet member 2B side are on the back sheet member 2B, more specifically, the back sheet. It is preferably located on the main body portion 20b of the member 2B, and the end portion 38b of the sheet material 38 is preferably terminated on the crotch C side with respect to the end portion 33b of the absorbent body 33.

  By making the length L7 of the sheet material 38 shorter than the length L6 of the absorber 33, the air permeability of the cylindrical waistline portion D of the diaper 1 can be improved. The cylindrical waistline portion D is a cylindrical portion formed by connecting the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B in a ring shape with a pair of side seal portions 4.

In the diaper 1 of the present embodiment, as shown in FIG. 2, the elastic member 36 of the first leak-proof cuff 34 has a length along the longitudinal direction X of the absorbent main body 3 and the elasticity of the second leak-proof cuff 37. It is longer than the member 39. Thereby, the fitting property to the wearer's skin of the 1st leak-proof cuff 34 improves.
The length of the elastic member here is a length of a portion of the elastic member that contributes to imparting stretchability to the first leak-proof cuff 34 or the second leak-proof cuff 37, for example, the first leak-proof cuff. When the end of the cuff 34 or the second leak-proof cuff 37 in the longitudinal direction X has a part released from the extended state, the length of the part is not included in the length of the elastic member.

In the diaper 1 of the present embodiment, the elastic member 39 for forming the second leak-proof cuff 37 has one end overlapped with the main body 20a of the ventral seat 2A and the other end is the main body of the back seat 2B. It overlaps with the part 20b. In other words, the elastic member 39 of the second leak-proof cuff 37 is such that the end on the abdomen seat member 2 </ b> A side and the end on the back seat 2 </ b> B side are both at the waist end rather than the lower end of the side seal part 4. 51 side. Thereby, the fitting property to the wearer's skin of the 2nd leak-proof cuff 37 improves.
The first leak-proof cuff 34 preferably has a free end 34a in contact with the vicinity of the base of the wearer's thigh, and the second leak-proof cuff 37 has a free end 37a spaced from the base of the thigh. It is preferable to contact the circumference of the thigh.

Further, as shown in FIG. 3, the first leak-proof cuff 34 has an upper fixing part 35u fixed to the top sheet 31 rather than a lower fixing part 35d fixed to the back sheet 32 (lower sheet). The inner side of the absorbent main body 3 in the width direction Y, that is, the longitudinal center line CL side of the absorbent main body 3 is located. Thereby, the standing property of the desired first leak-proof cuff can be maximized without being limited to the standing property of the absorber.
It is preferable that the distance L5 between the upper fixing portion 35u and the lower fixing portion 35d does not exceed L4, which is the distance between the folded portion 31c of the topsheet 31 and the upper fixing portion 35u.
The distance L5 between the upper fixing portion 35u and the lower fixing portion 35d is preferably a ratio (L5 / L4) to L4, which is the distance between the folded portion 31c of the top sheet 31 and the upper fixing portion 35u. % Or more, more preferably 5% or more, preferably 97% or less, more preferably 95% or less, preferably 3% or more and 97% or less, more preferably 5% or more and 95% or less. The distance L5 is preferably 5 mm or more, more preferably 8 mm or more, preferably 80 mm or less, more preferably 60 mm or less, and preferably 10 mm or more and 80 mm or less, more preferably 15 mm or more and 60 mm or less. is there.

In the diaper 1 of the present embodiment, as shown in FIG. 3, the pair of left and right second leak-proof cuffs 37, 37 have a plurality of elastic members 39 a, 39 b, respectively. 37a between the elastic member 39a arranged on the outermost side and the elastic member 39b arranged on the innermost side in the second leak-proof cuff 37 is the end 32c in the width direction of the back sheet 32 arranged on the skin facing surface side. Is located. By having such a configuration, the diaper 1 is further excellent in the ability to prevent stool bleeding. That is, since the innermost elastic body 39b fits the wearer's thigh, the entire area covering the absorbent body of the second leak-proof cuff is covered with the back sheet, and the feces from the second leak-proof cuff sheet The presence of the elastic body 39a on the outermost side can surely prevent oozing out of the outermost body, thereby further improving the hardness and fit of the elastic body around the foot, reducing the sense of incongruity. Can be prevented.
In addition, the aspect located in 37a between the elastic member 39a and the elastic member 39b includes the case where the edge part 32c of the back surface sheet 32 is located on the elastic member 39a or the elastic member 39b.

Moreover, as above-mentioned, the absorptive core 33a of the absorber 33 in the diaper 1 of this embodiment has the side part non-stacking parts 33c and 33c in each of both sides which pinch | interpose the longitudinal direction center line CL of an absorptive main body. The position of the outer end portion of the upper fixing portion 35u of the sheet material 35 forming the first leak-proof cuff 34, that is, the position of the base end portion 34b of the first leak-proof cuff 34 is the same as the side non-stacking portion 33c. It overlaps or is located on the inner side in the width direction than the side non-stacking portion 33c, that is, on the longitudinal center line CL side of the absorbent main body 3.
Thereby, the side part S of the absorber 33 becomes easier to stand up, and the effect of the present invention is further improved.

The material for forming the diaper 1 will be described.
As the top sheet 31, the back sheet 32, and the absorbent body 33 constituting the absorbent main body 3, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. . For example, a hydrophilic and liquid-permeable nonwoven fabric can be used as the top sheet 31, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 32. Can be used. The back sheet 32 may have water vapor permeability.
As the absorbent body 33, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core formed by holding water-absorbing polymer particles therein, a core wrap made of water-permeable thin paper or non-woven fabric. What was covered with the sheet | seat etc. can be used.

  As the sheet materials 35 and 38 for forming the first leak-proof cuff or the second leak-proof cuff, various sheet materials that are conventionally used for this type of article can be used without any particular limitation, but it is a non-woven fabric. It is also possible to use a laminate of a resin film and a nonwoven fabric, a laminated nonwoven fabric (SM, SMS, SMMS, etc.) having a spunbond layer (S) and a meltblown layer (M), and the like.

As the outer layer sheet 22 and the inner layer sheet 23, various sheet materials conventionally used for this type of article can be used without particular limitation, but is preferably a non-woven fabric, particularly from the viewpoint of flexibility and the like. It is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of a through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient.
As the elastic members 24, 36, 33e, 39, and 40, various known elastic members used for absorbent articles such as disposable diapers and sanitary napkins can be used. Examples of the elastic material of the elastic member include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can.

  As shown in FIGS. 2 and 3, the back sheet 32 in the diaper 1 described above has skin contact with the two-layer structure portion of the sheet material 38 that forms the second leak-proof cuff 37 on both sides in the longitudinal direction. Although arranged on the surface side, in the diaper (not shown) of the second embodiment of the present invention, both side portions of the back sheet 32 in the article longitudinal direction X form the second leak-proof cuff 37. The second leak-proof cuff 37 is composed of a side portion of the back sheet 32 and a sheet material 38 that is folded back so as to cover the side portion. In 2nd Embodiment, the side part of the back surface sheet 32 does not need to reach the position of the elastic member 39 (refer FIG. 3) for 2nd leak-proof cuff formation, and the elasticity for 2nd leak-proof cuff formation It may reach the position of the member 39, and all or part of the elastic member 39 may be present on the non-skin contact surface side or the non-skin contact surface side of the side portion. It is preferable to be located 37a between the elastic member 39a arranged on the outermost side and the elastic member 39b arranged on the innermost side. By having such a configuration, the diaper 1 is further excellent in the ability to prevent stool bleeding. In addition, the sheet material 38 that covers the skin contact surface side of the side portion of the back sheet 32 does not reach the position of the lower fixing portion 35d of the first leak-proof cuff 34 at the end portion on the center side in the article lateral direction Y. May or may not have been reached. If not, it is preferable that the lower fixing portion 35d is formed by joining the sheet material 35 forming the first leak-proof cuff to the back sheet 32 of the portion not covered with the sheet material 38. , The sheet material 35 forming the first leak-proof cuff is preferably joined to the sheet material 38 to form the lower fixing portion 35d.

The diaper of 2nd Embodiment also has the same effect as the diaper 1 mentioned above by satisfy | filling relational expression (1)-(4) mentioned above.
Furthermore, according to the diaper of 2nd Embodiment, when the 2nd leak-proof cuff fits around a wearer's leg, it can prevent that the back surface sheet 32 contacts a skin directly, and the touch around a leg improves. . Moreover, damage to the back sheet 32 in use can be prevented by exposing the back sheet 32. From such a viewpoint, it is preferable that the sheet material 38 folded back so as to cover the side portion of the back sheet 32 is made of a non-woven fabric, and is joined to the sheet material 35 that forms the second leak-proof cuff. It is preferable to form the side fixing portion 35d. The points that are not particularly described in the second embodiment can be the same as the diaper 1 in the above-described embodiment, including a preferable configuration.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.

  For example, the abdominal sheet member 2A may have an extending portion that extends from the lower end of the side seal portion 4 to the crotch C side, similarly to the back sheet member 2B. 2B may not have an extending portion like the ventral sheet member 2A.

Further, either one or both of the side-raising elastic member 33e and the intermediate elastic member 40 may not be arranged.
Moreover, although FIG.2 and FIG.3 showed the absorptive core 33a which has the center non-stacking part 33d in addition to the side part non-stacking part 33c, the absorber 33 in this invention is the side part non-stacking fiber. It may include an absorbent core 33a having only the portion 33c and not having the central non-stacking portion 33d. Moreover, the side part non-stacking part 33c of the absorptive core 33a may be formed in the aspect shown in FIG.
Moreover, the core wrap sheet | seat which coat | covers an absorptive core may coat | cover the whole absorptive core 33a by 1 sheet, and coat | covers the absorptive core 33a whole by combining 2 or more sheets. There may be. For example, the sheet covering the skin facing surface side of the absorbent core 33a and the sheet covering the non-skin facing surface side may be separate sheets.

The side seal portion 4 may have a non-joined portion with a narrow width (for example, greater than 0 mm and not more than 20 mm) where the abdominal sheet member 2A and the back seat member 2B are not joined to the outside of the side seal portion.
The pants-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1>
An abdominal sheet member disposed on the abdomen side of the wearer, a back side sheet member disposed on the back side of the wearer, and a vertically long absorptivity fixed across the abdomen sheet member and the back sheet member A pants-type absorbent article comprising a main body, wherein a ventral sheet member and a dorsal seat member are joined, and a pair of side seal parts, a waist opening part and a pair of leg opening parts are formed;
The absorbent main body includes a top sheet that forms a liquid absorption surface and a liquid-retaining absorbent, and a first end in which a free end is located inward of a side edge of the absorbent on each side in the longitudinal direction. A leakage cuff and a second leakage prevention cuff extending outward from the side edge of the absorber,
The top sheet and the first leak-proof cuff have a folded portion that is folded from the skin-facing surface side to the non-skin-facing surface side of the absorbent body on the outer side of both side edges of the absorbent body. Is fixed to the upper fixing part and the lower sheet fixed to the top sheet at positions spaced inward in the width direction from both side edges of the absorber on the non-skin facing surface side of the absorber. It has a lower fixing part,
The length from the folded portion of the first leak-proof cuff to the free end is L1, and the length from the folded portion of the first leak-proof cuff to the free end of the second leak-proof cuff is L2 in the second leak-proof cuff. 1 When the distance between the folded portion of the leak-proof cuff and the lower fixed portion is L3, and the distance between the folded portion of the topsheet and the upper fixed portion is L4, the following relational expressions (1) to ( A pants-type absorbent article that satisfies all 4).
(1) L1 ≦ L2
(2) L2 ≦ L1 + L3
(3) L3 ≦ L4
(4) L4 ≦ L1 + L3

<2>
The elastic member of one second leak-proof cuff and the elastic member of the other second leak-proof cuff are arranged in parallel to each other and extend in the longitudinal direction of the absorbent main body. > Pants-type absorbent article.
<3>
The sheet material forming the second leak-proof cuff is a sheet material different from the sheet material constituting the first leak-proof cuff. The pant-type absorbent article according to <1> or <2>, wherein the pants-type absorbent article is disposed on the non-skin facing surface side of the back sheet in the crotch part of the pant-type absorbent article.
<4>
A non-skin-permeable back sheet is disposed on the non-skin facing surface side of the absorbent body, and a second leak-proof cuff is made of a nonwoven fabric folded back so as to cover the side part of the back sheet and the side part. The underpants-type absorbent article according to the above <1> or <2>, comprising a sheet material.
<5>
The sheet material forming the second leak-proof cuff has a length in the longitudinal direction of the absorbent main body shorter than the length in the same direction of the absorbent body, and the pants type according to any one of the above items <1> to <4> Absorbent article.

<6>
The elastic member of the first leak-proof cuff is the pant according to any one of <1> to <4>, wherein a length along the longitudinal direction of the absorbent main body is longer than an elastic member of the second leak-proof cuff. Mold absorbent article.
<7>
In the elastic member of the second leak-proof cuff, the end on the abdomen seat member side and the end on the back seat side are both located on the waist end side with respect to the lower end of the side seal part, The underpants-type absorbent article according to any one of 1> to <6>.
<8>
The first leak-proof cuff is the pants according to any one of <1> to <7>, wherein the upper fixing portion is located on the inner side in the width direction of the absorbent main body than the lower fixing portion. Mold absorbent article.
<9>
The second leak-proof cuff has a plurality of elastic members, a liquid-impermeable back sheet is arranged on the non-skin facing surface side of the absorber, and the end of the back sheet in the width direction is the second anti-shock. The underpants-type absorbent article according to any one of <1> to <8>, wherein the pants-type absorbent article is located between an outermost elastic member and an innermost elastic member in the leakage cuff.
<10>
The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core, and the absorbent core has side non-stacked portions on both sides sandwiching the longitudinal center line of the absorbent main body. And the position of the outer end portion of the upper fixed portion overlaps with the side non-stacking portion, or is positioned on the inner side in the width direction than the side non-stacking portion, The underpants-type absorbent article according to any one of <1> to <9>.

<11>
Ratio of L2 to L1 (the length L2 of the second leak-proof cuff 37 from the folded portion 34c of the first leak-proof cuff 34 to the free end of the second leak-proof cuff 37 / folding of the first leak-proof cuff 34) The length L1) from the part 34c to the free end 34a is 1.0 or more and 6.0 or less, preferably 1.2 or more and 4.0 or less, any one of the above items <1> to <9> The pants-type absorbent article described in 1.
<12>
Ratio of the total length of L1 and L3 to L2 [(length L1 from the folded portion 34c of the first leak-proof cuff 34 to the free end 34a + folded portion 34c of the first leak-proof cuff 34 and lower fixing) Distance L3) from the portion 35d / the length L2 from the folded portion 34c of the first leak-proof cuff 34 to the free end of the second leak-proof cuff 37] is 1.0 or more and 7.0 or less, preferably The pants-type absorbent article according to any one of <1> to <11>, wherein is 1.2 or more and 4.0 or less.
<13>
The ratio of L4 to L3 (distance L4 between the folded portion 31c of the top sheet 31 and the upper fixing portion 35u / distance L3 between the folded portion 34c of the first leak-proof cuff 34 and the lower fixing portion 35d). The pant-type absorbent article according to any one of <1> to <12>, which is 1.0 or more and 6.0 or less, preferably 1.2 or more and 4.0 or less.
<14>
Ratio of the sum of L1 and L3 to L4 [(length L1 from the folded portion 34c of the first leak-proof cuff 34 to the free end 34a + folded portion 34c of the first leak-proof cuff 34 and lower fixing portion 35d L3) / distance L4 between the folded portion 31c of the topsheet 31 and the upper fixing portion 35u] is 1.0 or more and 7.0 or less, preferably 1.2 or more and 4.0 or less. The underpants-type absorbent article according to any one of the above items <1> to <13>.
<15>
The ratio of the L1 to the total width L of the absorbent main body is preferably 5% or more, more preferably 8% or more, and preferably 40% or less, more preferably 35% or less, <1> The underpants type absorbent article according to any one of ~ <14>.

<16>
The L1 is preferably 10 mm or more, more preferably 15 mm or more, and preferably 100 mm or less, more preferably 60 mm or less. The pant-type absorbency according to any one of the above <1> to <15> Goods.
<17>
The ratio of L2 to the total width L of the absorbent main body is preferably 5% or more, more preferably 8% or more, and preferably 40% or less, more preferably 35% or less, <1> The underpants type absorbent article according to any one of ~ <16>.
<18>
The L2 is preferably 10 mm or more, more preferably 15 mm or more, and preferably 100 mm or less, more preferably 70 mm or less. The pant-type absorbability according to any one of <1> to <17>. Goods.
<19>
The ratio L3 to the total width L of the absorbent main body is preferably 3% or more, more preferably 5% or more, and preferably 40% or less, more preferably 35% or less, <1> The underpants type absorbent article according to any one of ~ <18>.
<20>
The L3 is preferably 10 mm or more, more preferably 15 mm or more, preferably 80 mm or less, more preferably 60 mm or less, preferably 10 mm or more and 80 mm or less, more preferably 15 mm or more and 60 mm or less. The underpants type absorbent article according to any one of <1> to <19>.

<21>
The total length (L1 + L3) of the L1 and the L3 is preferably 10% or more, more preferably 20% or more, and preferably 80% or less, more preferably, the ratio to the total width L of the absorbent main body. The underpants-type absorbent article according to any one of <1> to <20>, which is 60% or less.
<22>
The ratio L4 to the total width L of the absorbent main body is preferably 3% or more, more preferably 5% or more, and preferably 40% or less, more preferably 35% or less, <1> The underpants type absorbent article according to any one of ~ <21>.
<23>
L3 is preferably 10 mm or more, more preferably 15 mm or more, and preferably 80 mm or less, more preferably 60 mm or less. The pant-type absorbency according to any one of <1> to <22> above Goods.
<24>
In the sheet material constituting the second leak-proof cuff, the end on the ventral sheet member side is located on the main body of the ventral sheet member, and the end of the sheet material is the end of the absorber. The underpants type absorbent article according to any one of <1> to <23>, which is terminated at the crotch part side.
<25>
The sheet material constituting the second leak-proof cuff has an end on the back sheet member side located on the main body of the back sheet member, and the end of the sheet material is an end of the absorber. The underpants-type absorbent article according to any one of <1> to <24>, which is terminated at the crotch part side.

<26>
The first leak-proof cuff 34 preferably has a free end 34a in contact with the vicinity of the base of the wearer's thigh, and the second leak-proof cuff 37 has a free end 37a spaced from the base of the thigh. The underpants-type absorbent article according to any one of the above items <1> to <13>, which contacts the periphery of the thigh.
<27>
The distance L5 between the upper fixing portion and the lower fixing portion is any one of <1> to <26>, which does not exceed L4, which is the distance between the folded portion of the top sheet and the upper fixing portion. The underpants type absorbent article as described.
<28>
The distance L5 between the upper fixing portion and the lower fixing portion is preferably a ratio of L4, which is the distance between the folded portion of the top sheet and the upper fixing portion, of 3% or more, more preferably 5% or more. The pants-type absorbent article according to any one of <1> to <27>, which is preferably 97% or less, more preferably 95% or less.
<29>
The back side seat member has a length in the article longitudinal direction X that is longer than the length in the same direction of the side seal portion, whereby a main body portion having side seal portions on the left and right sides, and from the main body portion to the crotch C side. The underpants-type absorbent article according to any one of the above items <1> to <28>, wherein an extended portion that does not have a side seal portion is formed on both sides.
<30>
The abdominal sheet member 2A has a main body portion 20a having side seal portions 4 and 4 on the left and right sides, but does not have an extension portion extending from the main body portion 20a to the crotch C side, <1> The underpants type absorbent article according to any one of ~ <13>.

<31>
The abdominal side seat portion has a waist stretchable portion and a waistline stretchable portion, and the backside seat member has a waist stretchable portion, a waistline stretchable portion, and an extension portion stretchable portion, <1> to <30> The underpants type absorbent article of any one of.
<32>
<1> to <31, wherein the two sheets constituting the abdominal side sheet member and the back side sheet member are joined at a large number of joining portions formed in a dotted shape so as not to pass through the elastic member. > The pants type absorbent article according to any one of the above.
<33>
<1> to <1>, wherein the absorbent core has a central non-stacked fiber portion in which the absorbent core forming material does not exist or the basis weight of the formed material is smaller than that of the other portions. The underpants-type absorbent article according to any one of <33>.
<34>
Any one of the above items <1> to <33>, in which the sheet material forming one of the second leak-proof cuffs and the sheet material forming the other second leak-proof cuff are formed of a single continuous sheet. The underpants type absorbent article as described.
<35>
Any one of the above <1>, <2>, and <4> to <34>, wherein the sheet material forming the second leak-proof cuff is a sheet material different from the sheet material constituting the first leak-proof cuff The underpants-type absorbent article according to 1.

<36>
The elastic member for raising the side portion is fixed between the side edge portion of the absorber and the surface sheet that covers the side edge portion, according to any one of the above <1> to <35>. Pants-type absorbent article.
<37>
The pants-type absorbent article according to any one of <1> to <36>, wherein an intermediate elastic member is disposed at a central portion between the free end and the base end portion of the first leak-proof cuff <38>
The pants-type absorbent article according to any one of <1> to <37>, wherein the sheet material forming the first leak-proof cuff or the second leak-proof cuff is a nonwoven fabric.

1 Pants-type disposable diapers (pants-type absorbent articles)
2A Abdominal side sheet member 2B Back side sheet member 21b Back side extension part 3 Absorbent main body 31 Top sheet 31c Folding part of 2nd leak-proof cuff 32 Back sheet 33 Absorber 33a Absorbent core 33b Core wrap sheet 34 1st prevention Leakage cuff 34a Free end of first leakproof cuff 34b Base end portion of first leakproof cuff 34c Folded portion of first leakproof cuff 35 Sheet material for forming first leakproof cuff 35u Upper fixed portion 35d Lower fixed portion 36 Elastic member forming the first leak-proof cuff 37 Second leak-proof cuff 37a Free end of the second leak-proof cuff 38 Sheet material for forming the second leak-proof cuff 39 Elastic member 4 forming the second leak-proof cuff Side Seal part 5 Waist opening 6 Leg opening

Claims (10)

An abdominal sheet member disposed on the abdomen side of the wearer, a back side sheet member disposed on the back side of the wearer, and a vertically long absorptivity fixed across the abdomen sheet member and the back sheet member A pants-type absorbent article comprising a main body, wherein a ventral sheet member and a dorsal seat member are joined, and a pair of side seal parts, a waist opening part and a pair of leg opening parts are formed;
The absorbent main body includes a top sheet that forms a liquid absorption surface and a liquid-retaining absorbent, and a first end in which a free end is located inward of a side edge of the absorbent on each side in the longitudinal direction. A leakage cuff and a second leakage prevention cuff extending outward from the side edge of the absorber,
The top sheet and the first leak-proof cuff have a folded portion that is folded from the skin-facing surface side to the non-skin-facing surface side of the absorbent body on the outer side of both side edges of the absorbent body. Is fixed to the upper fixing part and the lower sheet fixed to the top sheet at positions spaced inward in the width direction from both side edges of the absorber on the non-skin facing surface side of the absorber. It has a lower fixing part,
The length from the folded portion of the first leak-proof cuff to the free end is L1, and the length from the folded portion of the first leak-proof cuff to the free end of the second leak-proof cuff is L2 in the second leak-proof cuff. 1 When the distance between the folded portion of the leak-proof cuff and the lower fixed portion is L3, and the distance between the folded portion of the topsheet and the upper fixed portion is L4, the following relational expressions (1) to ( A pants-type absorbent article that satisfies all 4).
(1) L1 ≦ L2
(2) L2 ≦ L1 + L3
(3) L3 ≦ L4
(4) L4 ≦ L1 + L3   The elastic member of one second leak-proof cuff and the elastic member of the other second leak-proof cuff are arranged in parallel to each other and extend in the longitudinal direction of the absorbent main body. The pants-type absorbent article described in 1.   The sheet material forming the second leak-proof cuff is a sheet material different from the sheet material constituting the first leak-proof cuff. The pants-type absorbent article according to claim 1, wherein the pants-type absorbent article is arranged on the non-skin facing surface side of the back sheet in the crotch part of the pants-type absorbent article.   A non-skin-permeable back sheet is disposed on the non-skin facing surface side of the absorbent body, and a second leak-proof cuff is made of a nonwoven fabric folded back so as to cover the side part of the back sheet and the side part. The underpants type absorbent article according to claim 1 or 2, comprising a sheet material.   The length of the sheet material forming the second leak-proof cuff in the longitudinal direction of the absorbent main body is shorter than the length in the same direction of the absorbent body. Goods.   The elastic member of the first leak-proof cuff has a length along the longitudinal direction of the absorbent main body that is longer than the elastic member of the second leak-proof cuff, according to any one of claims 1 to 5. Sex goods.   The elastic member of the second leak-proof cuff is such that an end portion on the abdomen seat member side and an end portion on the back seat side are both positioned closer to the waist end portion than the lower end of the side seal portion. The underpants-type absorbent article according to any one of 1 to 6.   The pant-type absorption according to any one of claims 1 to 7, wherein the first leak-proof cuff has the upper fixing portion positioned on the inner side in the width direction of the absorbent main body than the lower fixing portion. Sex goods.   The second leak-proof cuff has a plurality of elastic members, a liquid-impermeable back sheet is arranged on the non-skin facing surface side of the absorber, and the end of the back sheet in the width direction is the second anti-shock. The pants-type absorbent article according to any one of claims 1 to 8, which is located between an outermost elastic member and an innermost elastic member of the leakage cuff. The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core, and the absorbent core has side non-stacked portions on both sides sandwiching the longitudinal center line of the absorbent main body. And the position of the outer end portion of the upper fixed portion overlaps with the side non-stacking portion, or is positioned on the inner side in the width direction than the side non-stacking portion, The underpants type absorbent article of any one of Claims 1-9.

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