JP2010264041A - Pants type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants type disposable diaper in which folds hardly occur in an absorbent body, and wrinkles hardly occur in an under-crotch part, and which is excellent in wear feeling and leak preventing property by the contracting force of elastic members. <P>SOLUTION: The disposable diaper 1A includes leg gathers 70 formed of the first and second elastic members 71, 72 arranged along a pair of leg opening parts E. The first and second under-crotch adhesive areas G1, G2 for fixing the elastic members 71, 72 forming the leg gathers 70 are formed in the under-crotch part C of the diaper 1A and a non-adhesive area N is formed therebetween. The elastic members 71, 72 are cut in the center part N1 of the non-adhesive area N. In the elastic members 71, 72, at least a pair of them are crossed to each other in the under-crotch part C, the intersection 73 where the elastic members 71, 72 are crossed are arranged outside the respective leg openings E of the first and second under-crotch adhesive areas G1, G2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pants-type disposable diaper having excellent wearing feeling and leakproofness.

  Conventionally, a pants-type disposable diaper in which a plurality of elastic members are arranged so as to form a gather in a waist opening or a pair of leg openings is known. For example, in Patent Document 1, a leg elastic region is formed along the periphery of the leg opening, and the leg elastic region includes a plurality of first elastic members arranged from the abdominal side to the crotch. And a plurality of second elastic members arranged from the back side part to the crotch part, and a pants-type disposable diaper in which the plurality of first and second elastic members overlap each other in the crotch part is disclosed. Has been.

  However, since the pants-type disposable diaper described in Patent Document 1 has a configuration in which a plurality of first and second elastic members overlap each other in the crotch part, the contraction force of the overlapping portions is further increased. There is a possibility that the absorber breakage is promoted. When the absorbent body is broken in this way, the wearing feeling of the pants-type disposable diaper is inferior, and leakage may occur due to the breakage.

  Further, in Patent Document 2, an elastic member for forming a leg gather is present mainly in the vicinity of the leg hole in a state of being attached to a two-layer sheet-like material constituting the top sheet. A pants-type disposable diaper is disclosed in which only a small tail portion remains in the crotch area that does not require the use of a heel.

  However, in the pants-type disposable diaper described in Patent Document 2, two sets of elastic members are arranged in an extended state on the periphery of the leg hole, and the two sets of elastic members are crossed over at the crotch portion, and this crossover portion is included. Thus, a leg gather is formed by combining a nonwoven fabric and an elastic member by thermocompression bonding. In this way, when the nonwoven fabric and the elastic member including the crossover portion are combined, the crotch tends to generate wrinkles due to the contraction force of the elastic member at the crossover portion, and the generation of wrinkles causes the wearing of the pants-type disposable diaper. The feeling is inferior and leakage may occur due to wrinkles.

JP 2003-102777 A JP-A-6-327716

  Therefore, an object of the present invention is to provide a pants-type disposable diaper which is less likely to bend in the absorbent body due to the contraction force of the elastic member, is less likely to cause wrinkles in the crotch part, and has excellent wearing feeling and leak-proof properties. It is in.

  In the present invention, both sides of the ventral side and both sides of the dorsal side are joined together to form a waist opening and a pair of leg openings, which are arranged along each of the pair of leg openings. A pants-type disposable diaper having a pair of leg gathers formed by a plurality of first elastic members and a plurality of second elastic members, wherein the first elastic member is one leg of the ventral side portion The second elastic member extends from the one leg opening on the back side to the crotch, extending from the opening to the leg opening on the other side of the abdominal side through the crotch. A first crotch adhesion region and a second crotch adhesion which are arranged in an extended state through the other part and over the other leg opening of the dorsal side part, and fix the first and second elastic members to the crotch part A region is formed, and the first crotch adhesion region and the second crotch A non-bonding region is formed between the bonding region, and the first and second elastic members are fixed in the first and second crotch bonding regions and cut in a central portion of the non-bonding region. And at least one of the plurality of first and second elastic members intersects each other in the crotch part, and an intersection of the first and second elastic members intersects the first and second elastic members. The present invention provides a pants-type disposable diaper arranged on the outer side of each leg opening portion side of each second inseam adhesion region.

  According to the pants-type disposable diaper of the present invention, the absorbent member hardly breaks due to the contraction force of the elastic member, and wrinkles are not easily generated in the crotch portion.

FIG. 1 is a perspective view showing a pants-type disposable diaper according to the first embodiment of the present invention. FIG. 2 is a developed plan view showing a state where the pants-type disposable diaper shown in FIG. 1 is developed and extended. FIG. 3 is an enlarged plan view of a crotch part of the pants-type disposable diaper shown in FIG. FIG. 4 is an enlarged view of the main part showing the positional relationship between the plurality of first elastic members and the plurality of second elastic members of the pants-type disposable diaper shown in FIG. 2 and the first crotch adhesive region and the second crotch adhesive region. It is a top view. FIG. 5 shows the positional relationship between a plurality of first elastic members and a plurality of second elastic members of a pants-type disposable diaper according to the second embodiment of the present invention, and a first crotch adhesive region and a second crotch adhesive region. It is a principal part enlarged plan view which shows.

  Hereinafter, a preferred first embodiment of the pants-type disposable diaper of the present invention will be described with reference to FIGS.

The pants-type disposable diaper 1A of the first embodiment (hereinafter also referred to as “diaper 1A”) is provided on both sides 6a, 6a of the ventral side A and both sides of the back side B as shown in FIGS. The portions 6b and 6b are joined to each other to form a waist opening D and a pair of leg openings E and E, and a plurality of first elastic members arranged along the pair of leg openings E and E, respectively. 71 and a pair of leg gathers 70, 70 formed by a plurality of second elastic members 72.
2 and 3, the diaper 1A is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the diaper 1A. Therefore, in the following description, the left and right symmetrical parts will be mainly described.

  The diaper 1A will be described in detail. As shown in FIG. 2, the diaper 1A includes a liquid-permeable top sheet 2, a liquid-impermeable (including water-repellent) back sheet 3, and both sheets 2 and 3. A substantially vertically long absorbent main body 5 having the absorbent body 4 formed, and an outer layer body 6 disposed on the back sheet 3 side of the absorbent main body 5 and extending over the entire outer side of the absorbent main body 5. I have. The absorbent main body 5 is bonded and fixed to the outer layer body 6. As shown in FIGS. 1 and 2, the diaper 1 </ b> A is melted by superimposing both side edges 6 a, 6 a of the ventral side A of the extended outer layer body 6 and both side edges 6 b, 6 b of the back side B on each other. A waist opening D and a pair of leg openings E, E are formed. As shown in FIGS. 1 and 2, the diaper 1A includes an abdominal side A located on the abdomen side of the wearer, a dorsal side B located on the back side of the wearer at the time of wearing, and an abdomen A and the dorsal side A crotch portion C is provided between the portion B and the portion B.

  In the diaper 1A, the absorber 4 has an hourglass shape (see FIGS. 1 and 3) in which the central portion is confined, the top sheet 2 and the back sheet 3 are rectangular, and the top sheet 2 and the back sheet 3 are As shown in FIG. 2, the absorber 4 is joined to each other at a portion extending from both ends of the longitudinal direction of the absorber 4 (hereinafter referred to as “Y direction”. Y direction: a direction parallel to the center line CL). They are joined to each other at portions extending from both ends of the direction (hereinafter referred to as “X direction”. X direction: a direction perpendicular to the center line CL extending in the longitudinal direction of the disposable diaper 1A). By joining in this way, the vertically long rectangular absorbent main body 5 is formed.

  As shown in FIG. 2, the outer layer body 6 has an abdominal part A, a crotch part C, and a dorsal part B in the longitudinal direction (Y direction). As shown in FIG. 2, the outer layer body 6 extends over the entire outer region of the absorbent main body 5, and a constricted portion 6 d that is constricted inward in the longitudinal direction (Y direction) center portion on both side edges thereof. , 6d. These constricted portions 6d and 6d have a pair of leg openings when the side edge portions 6a and 6a of the ventral side portion A of the outer layer body 6 and the side edge portions 6b and 6b of the back side portion B are overlapped and fused to each other. This is a part that becomes parts E and E. As shown in FIG. 2, the outer layer body 6 in the first embodiment is formed by an outer layer sheet 61 that is the outermost surface of the pant-type absorbent article and an inner layer sheet 62 that is disposed on the inner surface side of the outer layer sheet 61. Yes.

  As shown in FIGS. 1 and 2, a first elastic member 71 and a second elastic member 72, a waist elastic member 8, and a waist elastic member 9 are disposed between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer layer body 6. A pair of annular leg elastic regions (leg gathers) 70, 70, a waist elastic region (waist gather) 80 and a waistline elastic region (waistline gather) 90 are formed. As shown in FIGS. 1 and 2, the waist elastic region (waist gather) 80 has a plurality of waist elastic members 8 outward in the longitudinal direction (Y direction) from the absorbent main body 5. It is formed by arranging in a stretched state between both side edges 6a, 6b on the ventral side A and between both side edges 6b, 6b on the back side B. A waistline elastic region (a waistline gather) 90 includes a plurality of waistline elastic members 9 between the waist elastic member 8 and the constricted portion 6d of the outer layer body 6 as shown in FIGS. 6 is formed by extending in a stretched state between both side edges 6a and 6b on the ventral side A and between both side edges 6b and 6b on the back side B.

  Between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer layer body 6 of the diaper 1A, as shown in FIGS. 2 and 3, an abdominal side adhesion region G3 in which an adhesive is applied in the entire region of the abdominal side part A and The back side adhesion region G4 where the adhesive is applied in the entire region of the back side portion B, and the first crotch adhesion region G1 and the second crotch adhesion region G2 where the adhesive is applied are formed in the crotch part C. . As shown in FIG. 3, the crotch part C of the diaper 1A has a first crotch adhesive region G1 and a second crotch adhesive region G2 to which a plurality of first elastic members 71 and a plurality of second elastic members 72 are fixed. A non-adhesive region N is formed between the first crotch adhesive region G1 and the second crotch adhesive region G2, and the plurality of first elastic members 71 and the plurality of second elastic members 72 are: It is fixed in the first crotch adhesive region G1 and the second crotch adhesive region G2, and is cut at the central portion N1 of the non-adhesive region N. The crotch part C of the diaper 1A will be specifically described below with reference to FIGS.

  As shown in FIG. 2, the plurality of first elastic members 71 are connected to the crotch portion C from the leg opening E (the constricted portion 6 d) on one side of the ventral side A (the left side in FIG. 2 in the present embodiment). And the other leg opening E (the right side in FIG. 2 in the present embodiment) of the ventral side A is stretched over the leg opening E (the constricted part 6d). Cut at the center N1. More specifically, as shown in FIGS. 2 and 3, the plurality of first elastic members 71 are arranged from one side edge 6 a of the ventral side A (left side of FIG. 2) to one of the ventral side A (see FIG. 2). 2 (left side) 2 along the leg opening E (constricted part 6d), passes through the crotch part C, and along the leg opening part E (constricted part 6d) on the other side of the ventral side A (right side in FIG. 2). In the crotch part C, the center part (center line) of a non-adhesive region N (described later) that is arranged in an extended state until reaching the other side edge 6a of the ventral side part A (right side in FIG. 2) and no adhesive is applied. The portion including CL is cut at N1.

  As shown in FIG. 2, the plurality of second elastic members 72 pass from the leg opening E (constricted portion 6 d) on one side (left side in FIG. 2) of the back side portion B through the crotch C to the back side portion B. The other leg opening (the right side in FIG. 2) is extended in a stretched state and is cut at the central portion N1 of the non-bonding region N of the crotch C. More specifically, as shown in FIGS. 2 and 3, the plurality of second elastic members 71 are arranged on one side edge 6 a of the back side portion B (left side in FIG. 2), similarly to the first elastic member 71. To the back side B (left side in FIG. 2) of the leg opening E (constricted part 6d), passing through the crotch C and the other side of the back side B (right side of FIG. 2) leg opening A non-adhesive region in which the adhesive is not applied in the crotch part C, which extends along the part E (the constricted part 6d) to the side edge part 6a on the other side (the right side in FIG. 2) of the back side part B. N is cut at the central portion N1.

  In the first crotch adhesion region G1 and the second crotch adhesion region G2 of the outer layer body 6 of the diaper 1A, a plurality of first elastic members 71 and a plurality of second elastic members 72 are fixed. As shown in FIG. 3, the first crotch adhesive region G1 and the second crotch adhesive region G2 are formed apart from the ventral adhesive region G3 and the back adhesive region G4 in the longitudinal direction (Y direction) of the diaper 1A. In the width direction (X direction) of the diaper 1 </ b> A, the diaper 1 </ b> A is disposed on the inner side of the opening edge of the leg opening E (the constricted portion 6 d). As shown in FIG. 3, a non-adhesive region N to which no adhesive is applied is formed between the first crotch adhesive region G1 and the second crotch adhesive region G2.

The first crotch adhesive region G1 and the second crotch adhesive region G2 are each rectangular as shown in FIGS. As shown in FIGS. 2 and 3, the first crotch adhesive region G1 and the second crotch adhesive region G2 are formed symmetrically with respect to the center line CL of the diaper 1A and have the same shape. Hereinafter, the first crotch adhesion region G1 will be described.
As shown in FIG. 2, the first crotch adhesive region G1 has a length L1 in the longitudinal direction (Y direction) at the crotch part C of the diaper 1A. It is preferable that the elastic member 72 is wider than the arrangement region of the elastic member 72. Specifically, the elastic member 72 is preferably 10 mm to 50 mm, and the length L1 in the longitudinal direction (Y direction) and the maximum distance in the longitudinal direction (Y direction) of the diaper 1A. The ratio to L2 (L1 / L2) is preferably 1/54 to 5/49, and more preferably 3/54 to 3/49. 2, the width W1 in the width direction (X direction) of the first crotch adhesive region G1 is preferably 25 mm to 75 mm, and the width W1 in the width direction (X direction) and the crotch of the diaper 1A The ratio (W1 / W2) to the minimum distance W2 in the width direction (X direction) in the portion C is preferably 1/16 to 5/22, and more preferably 1/8 to 5/33.

  As shown in FIG. 3, the first crotch adhesive region G1 has an outer edge g1 on the leg opening E (constricted part 6d) side along an outer edge 41 on the leg opening E (constricted part 6d) side of the absorber 4. Are arranged. The shape of the outer edge g1 of the first inseam adhesion region G1 corresponds to the shape of the outer edge 41 of the absorbent body 4 as shown in FIG. The distance between the outer edge g1 of the first inseam adhesion region G1 and the outer edge 41 of the absorbent body 4 is preferably 0 mm to 50 mm, and preferably 0 mm to 20 mm, from the viewpoint of imparting the lifting effect of the absorbent body to the elastic body. Is more preferable.

  The non-adhesion region N between the first crotch adhesion region G1 and the second crotch adhesion region G2 will be described in detail. As shown in FIG. 3, the width direction of the non-adhesion region N to which no adhesive is applied ( The width W3 in the X direction is preferably 10 mm to 70 mm, and the ratio of the width W3 in the width direction (X direction) and the minimum distance W2 in the width direction (X direction) in the crotch C of the diaper 1A (W3 / W2) is preferably 1/18 to 7/18, more preferably 2/9 to 1/3.

  As shown in FIGS. 2 and 3, the diaper 1 </ b> A has an outer layer sheet 61 on the abdominal side A and an inner layer sheet 62 on the abdominal side A fixed in the abdominal side adhesion region G <b> 3. Between the sheet 61 and the inner layer sheet 62 of the ventral side A, the waist elastic member 8 of the ventral side A, the waist elastic member 9 of the ventral side A, and a part of the first elastic member 71 are fixed. As shown in FIGS. 2 and 3, the diaper 1 </ b> A has an outer layer sheet 61 on the back side portion B and an inner layer sheet 62 on the back side portion B fixed to each other in the back side adhesion region G <b> 4. A part of the waist elastic member 8 of the back side B, the waist elastic member 9 of the back side B, and the second elastic member 72 are fixed between the outer layer sheet 61 and the inner layer sheet 62 of the back side B. Yes. 2 and 3, the diaper 1A has an outer layer sheet 61 at the crotch C and an inner layer sheet 62 at the crotch C fixed in the first crotch adhesive region G1 and the second crotch adhesive region G2. A part of the first elastic member 71 and a part of the second elastic member 72 disposed on the crotch part C are fixed between the outer layer sheet 61 of the crotch part C and the inner layer sheet 62 of the crotch part C. The first elastic member 71 and the second elastic member 72 arranged in the crotch part C are cut at the central portion N1 of the non-adhesive region N as shown in FIGS.

  By cutting the plurality of first elastic members 71, the plurality of first elastic members 71 are, as shown in FIGS. 2 to 4, leg opening portions on one side of the ventral side A (left side in FIG. 2). In E (bending portion 6d), a gather forming portion 71a disposed along the leg opening E (bending portion 6d), and a gather forming extending portion 71b extending from the gather forming portion 71a toward the center line CL. It becomes. Similarly, in the leg opening E (constricted part 6d) on the other side of the ventral side A (the right side in FIG. 2), the plurality of first elastic members 71 have leg openings as shown in FIGS. A gather forming portion 71a arranged along the portion E (the constricted portion 6d) and a gather forming extension portion 71b extending from the gather forming portion 71a toward the center line CL.

  By cutting the plurality of second elastic members 72, as with the first elastic member 71, the plurality of second elastic members 72 can be connected to one of the back side portions B (see FIG. 2 to FIG. 4). In the leg opening E (constricted part 6d) on the left side of FIG. 2, the gather forming part 72a arranged along the leg opening E (constricted part 6d) and the gather forming part 72a toward the center line CL. It becomes the gather formation extension part 72b extended. Similarly, in the leg opening E (constricted part 6d) on the other side of the back side B (the right side in FIG. 2), the plurality of second elastic members 72 have leg openings as shown in FIGS. A gather forming portion 72a disposed along the portion E (the constricted portion 6d) and a gather forming extending portion 72b extending from the gather forming portion 72a toward the center line CL.

  The diaper 1A has a leg opening by a gather forming portion 71a and a gather forming portion 72a arranged along one leg opening E (the constricted portion 6d) of one of the ventral side A and the back side B (left side in FIG. 2). A leg elastic region (leg gather) 70 extending from the gather forming portion 71a and the gather forming portion 72a toward the center line CL is closed by the gather forming extension portions 71b and 72b. Has been. Similarly, the diaper 1A includes a gather forming portion 71a and a gather forming portion 72a disposed along the leg opening E (the constricted portion 6d) on the other side (the right side in FIG. 2) of the ventral side A and the back side B. Leg elastic regions (leg gathers) that are closed annularly along the periphery of the leg opening E, and further extended toward the center line CL from the gather forming portion 71a and the gather forming portion 72a by the gather forming extension portions 71b and 72b. 70 is formed.

  The gather forming extension 71b of the first elastic member 71 and the gather forming extension 72b of the second elastic member 72 are formed by cutting the stretched first elastic member 71 or the stretched second elastic member 72. Therefore, in the 1st crotch adhesion area | region G1 and the 2nd crotch adhesion area | region G2, it is adhering in the expansion | extension state, The part extended to the centerline CL side from the 1st crotch adhesion area | region G1 and the 2nd crotch adhesion area | region G2. (The portion of the non-adhesion region N between the first crotch adhesion region G1 and the second crotch adhesion region G2) includes a portion that has returned to the natural state by snapback.

As shown in FIGS. 3 and 4, the plurality of first elastic members 71 and the plurality of second elastic members 72 cross each other at the crotch part C, and the first elastic member An intersection 73 where 71 and the second elastic member 72 intersect is arranged outward on the leg opening E (narrow portion 6d) side of each of the first crotch adhesive region G1 and the second crotch adhesive region G2.
The positional relationship between the plurality of first elastic members 71 and the plurality of second elastic members 72 and the first crotch adhesive region G1 and the second crotch adhesive region G2 will be described in more detail. The second crotch adhesive region G2 has the same configuration as the first crotch adhesive region G1 except that it is symmetrical with respect to the center line CL. The relationship between the elastic member 71 and the plurality of second elastic members 72 will be described.

  1 to 5 first elastic members 71 are preferably arranged, and the first elastic member 71 of the first embodiment is formed of three elastic members as shown in FIGS. ing. As shown in FIGS. 2 to 4, the three first elastic members 71 are arranged at substantially equal intervals so as not to overlap each other. As shown in FIGS. 3 and 4, the three first elastic members 71 of the first embodiment include one leg opening E (the constricted portion 6 d) on the ventral side A (left side in FIG. 2) and the ventral side. A first elastic member 71A disposed closest to the leg opening E (constricted portion 6d) on the other side (right side in FIG. 2) of the portion A, and a first elastic member 71C disposed farthest away The first elastic member 71B is disposed between the first elastic member 71A and the first elastic member 71C.

  One to five second elastic members 72 are preferably arranged, and the second elastic member 72 of the first embodiment is similar to the first elastic member 71 as shown in FIGS. It is formed from three elastic members. As shown in FIGS. 2 to 4, the three second elastic members 72 are arranged at substantially equal intervals so as not to overlap each other, like the first elastic member 71. As shown in FIGS. 3 and 4, the three second elastic members 72 of the first embodiment include one leg opening E (constricted portion 6 d) on the back side B (left side in FIG. 2) and the back side. A second elastic member 72A disposed closest to the leg opening E (constricted portion 6d) on the other side (right side in FIG. 2) of the portion B; The second elastic member 72A is disposed between the second elastic member 72A and the second elastic member 72C.

  In the diaper 1A of the first embodiment, as shown in FIGS. 3 and 4, the first elastic member 71A and the second elastic member 72A intersect each other at one place, and the first elastic member 71A and the second elastic member 71A The intersection 73AA where the elastic member 72A intersects (A on the front side of the intersection 73AA means A of the first elastic member 71A and A on the rear side means A of the second elastic member 72A) is bonded to the first inseam. The region G1 is disposed outward on the leg opening E (constricted portion 6d) side (side away from the center line CL). The first elastic members 71A, 71B, 71C and the second elastic members 72A, 72B, 72C do not overlap and do not intersect except at the intersection 73AA. As shown in FIG. 4, each of the three first elastic members 71A, 71B, 71C and the three second elastic members 72A, 72B, 72C has a leg opening E (constricted portion) in the first crotch adhesion region G1. 6d) are arranged from the side toward the center line CL, and are arranged substantially in parallel with a space therebetween.

The material for forming the diaper 1A of the first embodiment will be described.
As the surface sheet 2, the back sheet 3, and the absorbent body 4, each can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 2, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 3. be able to. As the absorbent body 4, an absorbent body composed of absorbent polymer particles and fiber material and covered with tissue paper (not shown) can be used.

  As the outer layer sheet 61 constituting the outer layer body 6 and the inner layer sheet 62 of the back side portion B, any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 51 and the inner layer sheet 52, a water-repellent nonwoven fabric or the like can be used.

  The waist elastic member 8, the waistline elastic member 9, the first elastic member 71, and the second elastic member 72 can be used without particular limitation as long as they are usually used in absorbent articles such as disposable diapers. For example, a stretchable material made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.

The expansion ratio of the first elastic member 71 and the second elastic member 72 before cutting is 160% from the viewpoint of achieving both troubles such as elastic traces on the skin and no gap around the legs. It is preferably ˜250%, more preferably 200% to 240%. The expansion magnification here is a value obtained from the following equation when the length when not stretched is A (mm) and the length when stretched is B (mm).
Stretch magnification (%) = (B / A) × 100

  The adhesive applied to each of the first crotch adhesive region G1, the second crotch adhesive region G2, the abdomen adhesive region G3, and the back adhesive region G4 is usually used for absorbent articles such as disposable diapers. For example, it can be used without particular limitation. For example, hot melt adhesives such as styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene copolymer (SEBS), etc. A gel-like pressure-sensitive adhesive or the like used in the agent can be used. Examples of the adhesive application pattern include a stripe shape, a spiral shape, a solid coating, and a dot shape.

The amount of adhesive applied in each of the first crotch adhesive region G1 and the second crotch adhesive region G2 is such that the elastic body is held along the leg hole while firmly fixing the end of the elastic body, so that the entire circumference around the leg In view of the influence of the elastic body, it is preferable that the amount of adhesive applied in the abdomen-side adhesive region G3 or the amount of adhesive applied in the back-side adhesive region G4 is larger. The coating amount of the adhesive in the first crotch bonding areas G1 and the second crotch adhesive region G2, it is preferably ^{2.5g / m 2 ~20g / m 2} , a 10g / m ² ~16g / m ² Is more preferable. On the other hand, the amount of adhesive applied in the ventral adhesive region G3 or the amount of adhesive applied in the back adhesive region G4 is preferably 1.0 g / m ^{2 to} 5.0 g / m ² , and 2.0 g / m ^2. it is more preferably m ² ~4.0g / m ^2.

  Various known cutting means can be used for cutting at the central portion N1 of the non-bonded region N of the first elastic member 71 and the second elastic member 72. For example, a pinch cutter, a rotary die cutter, a heat seal cutter, an ultrasonic cutter, a water jet cutter, or the like can be used.

The effect at the time of using the diaper 1A of 1st Embodiment of this invention mentioned above is demonstrated.
As shown in FIGS. 3 and 4, the diaper 1A includes a first elastic member 71A in the three first elastic members 71 and a second elastic member 72A in the three second elastic members 72. In the part C, they intersect each other at one place, and the intersection 73AA where the first elastic member 71A and the second elastic member 72A intersect is outside the leg opening E (narrowed part 6d) side of the first crotch adhesive region G1. It is arranged towards. The same applies to the relationship between the second inseam adhesion region G2, the first elastic member 71, and the plurality of second elastic members 72. As described above, in the first crotch adhesive region G1 and the second crotch adhesive region G2, as shown in FIGS. 3 and 4, the three first elastic members 71A, 71B, 71C and the three second elastic members. 72a, 72B and 72C do not intersect with each other, and elastic members are arranged in a wide range. Therefore, the diaper 1A at the time of use has no improvement in elastic force due to the elastic members overlapping in the first crotch adhesive region G1 and the second crotch adhesive region G2, and the absorber 4 is hardly broken. Since wrinkles are less likely to occur in the crotch part C, the wearing feeling is improved. Further, the diaper 1A in use has a crotch portion C in which the absorbent body 4 of the absorbent main body 5 is crotched by the first elastic members 71A, 71B, 71C and the second elastic members 72a, 72B, 72C disposed over a wide range. The leakage resistance is improved.

  Moreover, since the non-adhesion area | region N is formed between the 1st crotch adhesion area | region G1 and the 2nd crotch adhesion area | region G2, as for the diaper 1A, as shown in FIGS. Improves diaper rash and the like.

  Further, as shown in FIG. 3, the diaper 1A includes a first crotch adhesive region G1 and a second crotch adhesive region G2 in the longitudinal direction (Y direction) of the diaper 1A. In the width direction (X direction) of the diaper 1 </ b> A, and is arranged on the inner side of the opening edge of the leg opening E (the constricted portion 6 d). In the diaper 1A, as shown in FIG. 3, a non-adhesive region N is formed between the first crotch adhesive region G1 and the second crotch adhesive region G2. Thus, since the diaper 1A has the area | region where the adhesive agent is not apply | coated, it can reduce cost.

Next, the disposable diaper of 2nd Embodiment of this invention is demonstrated based on FIG.
About the disposable diaper 1B of 2nd Embodiment, a different point from the disposable diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of 1 A of disposable diapers of 1st Embodiment, and description of 1 A of disposable diapers of 1st Embodiment is applied suitably.

The disposable diaper 1B of the second embodiment (hereinafter also referred to as “diaper 1B”) includes a plurality of first elastic members 71 and a plurality of second elastic members 72 at a plurality of locations in the crotch portion C. Of the plurality of intersections 73 intersecting with each other and intersecting the first elastic member 71 and the second elastic member 72, the intersection 73 located closest to the central portion N1 side of the crotch C is the first inseam adhesion region G1. And it is distribute | arranged to the outer side of the leg opening part E (narrow part 6d) side of each 2nd crotch adhesion area | region G2.
Regarding the positional relationship between the plurality of first elastic members 71 and the plurality of second elastic members 72 and the first crotch adhesion region G1 and the second crotch adhesion region G2, the first crotch adhesion region G1 and the second crotch adhesion Since the region G2 is symmetrical with respect to the center line CL, the plurality of first elastic members 71, the plurality of second elastic members 72, and the first inseam adhesion region G1 will be described in the same manner as the diaper 1A. .

  In the diaper 1B, as shown in FIG. 5, in the crotch part C, the first elastic members 71A among the three first elastic members 71 intersect with the three second elastic members 72A, 72B, 72C, respectively. Three intersections 73AA (A on the front side of the intersection 73AA means A of the first elastic member 71A, and A on the rear side means A of the second elastic member 72A), 73AB, 73AC is doing. In the diaper 1B, as shown in FIG. 5, in the crotch part C, the first elastic member 71B among the three first elastic members 71 intersects with the two second elastic members 72A and 72B, respectively. And has two intersections 73BA and 73BB. As shown in FIG. 5, the diaper 1 </ b> B includes a first elastic member 71 </ b> C out of the three first elastic members 71 intersecting with one second elastic member 72 </ b> A in the crotch C. Has an intersection 73CA.

  Among the five intersections 73AA, 73AB, 73AC, 73BA, 73BB, 73, 73CA where the three first elastic members 71A, 71B, 71C and the three second elastic members 72A, 72B, 72C intersect As shown in FIG. 5, the intersection 73CA located on the center part N1 side of the crotch part C is disposed outward on the leg opening E (constricted part 6d) side of the first crotch adhesion area G1.

  The three first elastic members 71A, 71B, 71C and the three second elastic members 72A, 72B, 72C intersect at six intersections 73AA, 73AB, 73AC, 73BA, 73BB, 73, 73CA that intersect each other. As shown in FIG. 5, they do not overlap and do not intersect. As shown in FIG. 5, each of the three first elastic members 71A, 71B, 71C and the three second elastic members 72A, 72B, 72C has a leg opening E (constricted portion) in the first crotch adhesion region G1. 6d) is arranged from the side toward the center line CL, and is arranged in a wide range substantially in parallel with a substantially spaced distance from each other.

The effect at the time of using the disposable diaper 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
The disposable diaper 1B of the second embodiment has the same effects as the disposable diaper 1A of the first embodiment. Hereinafter, effects different from those of the deployable disposable diaper 1A of the first embodiment will be described.

  Since the disposable diaper 1B of the second embodiment can fix the end of the elastic body even if the length L1 in the longitudinal direction (Y direction) in the first inseam adhesion region G1 is short, the cost advantage is also great. .

  The disposable diaper of this invention is not restrict | limited at all to the disposable diaper 1A of the above-mentioned 1st Embodiment, and the disposable diaper 1B of 2nd Embodiment, It can change suitably.

  For example, in the diaper 1A and the diaper 1B described above, as shown in FIGS. 4 and 5, the non-adhesive region N where no adhesive is applied between the first crotch adhesive region G1 and the second crotch adhesive region G2. However, a small amount of adhesive may be applied so that the stretched first elastic member 71 or the stretched second elastic member 72 cannot be fixed.

  Further, as shown in FIG. 3, the diaper 1A described above includes a first crotch adhesive region G1 and a second crotch adhesive region G2 in the longitudinal direction (Y direction) of the diaper 1A. Although it is separated from the region G and no adhesive is applied to the separated portion, a smaller amount of adhesive is applied than the amount of adhesive applied in the first crotch adhesive region G1 and the second crotch adhesive region G2. It may be applied. Similarly, as shown in FIG. 3, the diaper 1 </ b> A described above includes a first crotch adhesive region G <b> 1 and a second crotch adhesive region G <b> 2 in the leg direction E (constricted portion 6 d) in the width direction (X direction) of the diaper 1 </ b> A. ), The adhesive is not applied to the leg opening E (constricted portion 6d) side from the first crotch adhesive region G1 and the second crotch adhesive region G2. A smaller amount of adhesive may be applied than the amount of adhesive applied in the crotch adhesive region G1 and the second crotch adhesive region G2.

  Moreover, although the diaper 1A and the diaper 1B described above include the outer layer body 6 composed of two sheets of the outer layer sheet 61 and the inner layer sheet 62, they are pants-type disposable diapers that do not have the outer layer body 6. Alternatively, even if the outer layer body 6 is provided, the outer layer body 6 may not be formed of two sheets.

1A, 1B Pants-type disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 41 Outer edge 5 on the leg opening E (bending portion 6d) side Absorbent body 6 Outer layer body 61 Inner layer sheet 62 Outer layer sheet 6d Bending portion 70 Leg elastic region ( Leg gather)
71 (71A, 71B, 71C) 1st elastic member 72 (72A, 72B, 72C) 2nd elastic member 71a, 72a Gather formation part 71b, 72b Gather formation extension part 73 (73AA, 73AB, 73AC, 73BA, 73BB, 73CA ) Intersection 8 Waist elastic member 80 Waist elastic region (waist gather)
9 Girth elastic member 90 Girth elastic region (gather gather)
A back side part, B ventral side part, C crotch part, D waist opening part, E leg opening part G1 first crotch adhesion area g1 outer edge G2 on leg opening part E (constriction part 6d) side second crotch adhesion area, G3 Ventral bonding area, G4 Dorsal bonding area N Non-bonding area N1 Center

Claims (5)

The both sides of the abdomen and the sides of the dorsal side are joined together to form a waist opening and a pair of leg openings, and a plurality of second openings arranged along each of the pair of leg openings. A pants-type disposable diaper having a pair of leg gathers formed by one elastic member and a plurality of second elastic members,
The first elastic member is arranged in an extended state from the one leg opening on the abdominal side, through the crotch, to the other leg opening on the abdominal side,
The second elastic member is arranged in an extended state from one leg opening portion of the back side portion through the crotch portion to the other leg opening portion of the back side portion,
A first crotch adhesive region and a second crotch adhesive region for fixing the first and second elastic members are formed in the crotch portion, and the first crotch adhesive region and the second crotch adhesive region are formed between the first crotch adhesive region and the second crotch adhesive region. A non-adhesive region is formed, and the first and second elastic members are fixed in the first and second crotch adhesive regions, and are cut in a central portion of the non-adhesive region;
At least one of the plurality of first and second elastic members intersects each other in the crotch portion, and an intersection of the first and second elastic members intersects the first and second elastic members. A pants-type disposable diaper arranged on the outside of the leg opening portion side of each crotch adhesive region. The plurality of first elastic members and the plurality of second elastic members intersect each other at a plurality of locations in the crotch part,
Of the plurality of intersections at which the first elastic member and the second elastic member intersect, the intersection located closest to the center of the crotch is the leg of each of the first and second inseam adhesion regions. The pants-type disposable diaper according to claim 1, which is disposed outward of the opening side.   Each of the application amounts of the adhesive in the first and second crotch adhesion regions includes the application amount of the adhesive that fixes the plurality of first elastic members on the abdomen, or the plurality of second elastic members. The underpants-type disposable diaper according to claim 1 or 2, wherein the amount is larger than the amount of adhesive applied on the back side.   The outer edge on the leg opening portion side of each of the first and second crotch adhesion regions is arranged along the outer edge on the leg opening portion side of an absorbent body provided in the pant-type disposable diaper. A pants-type disposable diaper according to any one of the above. The pants-type disposable diaper includes a topsheet, a backsheet, and an absorbent main body having an absorbent body interposed between both sheets, and is disposed on the backsheet side of the absorbent main body and on the entire outer side of the absorbent main body. A pants-type disposable diaper provided with an outer layer body extending over,
The outer layer body is formed from an outer layer sheet which is the outermost surface of the pants-type disposable diaper, and an inner layer sheet disposed on the inner surface side of the outer layer sheet,
The plurality of first and second elastic members are each a pants-type disposable diaper according to any one of claims 1 to 4, which is disposed between the outer layer sheet and the inner layer sheet.

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