JP2016013178A - Disposable open-type diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable open-type diaper in which a fastening tab section fastened in a loop part is prevented from unintentional separation.SOLUTION: A disposable open-type diaper has an absorber 20, and a fastening tab section 14 is fastened and worn in a target tape 16. In a facing surface with backsheet 24 in the absorber, multiple thread grooves 55 meandering and extending in a lengthwise direction are formed side by side. The absorber forms a connection part with the backsheet between two grooves spaced apart greatly. The target tape of a mechanical fastener extends in the lateral direction B so as to be overlapped with the multiple connection parts, and crosses the multiple threads of the grooves to be bonded in the backsheet. When the fastening tab section fastened in the target tape is going to leave from the target tape, the fastening tab section deforms the absorber in the groove between the connection part and the connection part through the target tape and the backsheet, and prevents the separation of the fastening tab section.

Description

  The present invention relates to a disposable open-type diaper.

  Disposable open-type diapers that are worn using a mechanical fastener that attaches and detaches the hook member to and from the loop member are well known.

  For example, in the absorbent product described in JP-A-4-276251 (Patent Document 1), which is one of the prior arts, hook tabs that are hook members are attached to the ear portions formed on both sides of the rear waist portion. Yes. The front waist portion has a loop panel as a loop member attached between ear portions formed on both sides. The loop panel does not adhere to the entire back surface of the back sheet, but rather discontinuously in the width direction of the absorbent product, leaving the loop panel unbonded. In this case, a joined portion and a non-joined portion appear alternately. The document describes that such a loop panel is free to move with respect to the backsheet and increases the peel force and shear force between the hook tabs.

JP-A-4-276251

When the hook member and the loop member in the disposable diaper act in this manner, it is possible to prevent the hook member from being unexpectedly detached from the loop member depending on how the diaper wearer moves. Since the loop member is attached to the back sheet and may be touched by the wearer's hand while wearing the diaper, the loop member is preferably formed of a non-woven fabric that is comfortable to the touch. However, when the loop member formed of nonwoven fabric is joined to the back sheet, it seems that the joining portion and the non-joining portion are alternately formed in the lateral direction of the diaper. When the hook member is detached from the loop member, at least the end portion of the fibers forming the loop member may be easily entangled between the fibers and easily come off from the loop member at the non-joined portion. Since the fiber in such a state can no longer function as a loop member, the hook member is difficult to attach to the loop member, and the attached hook member is easily detached.
An object of the present invention is to provide a disposable open-type diaper which is improved so as to solve such problems in the prior art.

  In order to solve the above-described problems, the present invention is directed to a longitudinal direction and a lateral direction, in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. In addition, a fastening tab portion including a hook member of a mechanical fastener is formed on one of both sides of the front waistline region and the back waistline region that are opposed to each other through the crotch region in the longitudinal direction, and the front waistline region and the The other of the rear waist area is a disposable open-type diaper in which a target portion serving as a loop member of the mechanical fastener to which the hook member can be attached and detached is formed on the outer surface side of the back sheet. .

  The present invention is characterized as follows. A plurality of grooves extending in a meandering manner in the longitudinal direction and parallel to each other are formed on the surface of the absorber facing the back sheet. The two groove portions adjacent to each other in the lateral direction are formed with a peak portion that is convex from one side of the groove portion to the other and a trough portion that is concave, and the two groove portions are formed in the horizontal direction. While the valleys facing each other in the direction are largely separated from each other, the peaks facing each other in the lateral direction are close to or in contact with each other. The absorbent body is coated with a hot-melt adhesive that forms a bonding site with the back sheet between the valleys that are largely separated from each other, and the bonding site is formed through the groove in the lateral direction. They are lined up intermittently. The target portion is formed of a nonwoven fabric extending in the lateral direction, has a length that overlaps a plurality of the joint portions that are intermittently arranged, and is joined to the backsheet in a state of crossing a plurality of the grooves. ing.

  In the disposable open-type diaper according to the present invention, a plurality of grooves extending meandering in the vertical direction are formed side by side on the surface of the absorbent body facing the back sheet. The adjacent two groove portions are largely separated between the valley portions, while being close or in contact between the mountain portions. The absorbent body forms a joint portion with the back sheet between the two groove portions that are largely separated. The target portion of the mechanical fastener extends in the lateral direction so as to overlap with a plurality of joining portions, and is joined to the back sheet in a state of crossing the plurality of grooves. When a peeling force is applied between the target part and the hook member of the fastening tab part fastened to the target part, the hook member is absorbed through the target part and the back sheet. The body can be deformed in the groove portion between the joint portions to temporarily prevent the hook member from detaching from the target portion and prevent the hook member from being unexpectedly detached.

In addition to showing embodiments of the present invention, the following drawings also show forms that can be selectively implemented and forms that can be implemented in combination.
The perspective view when the diaper which concerns on this invention exists in a wearing condition. The partially broken top view which shows the inner surface side of the diaper of FIG. The figure which shows the III-III line | wire cut surface of FIG. The partially broken top view which shows the outer surface side of an absorber. The figure which shows typically the VV line | wire cut surface of FIG. The figure similar to FIG. 5 which shows the motion of the tab part for fastening typically. The figure similar to FIG. 4 which shows an example of an embodiment.

  The details of the disposable open-type diaper according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a baby diaper 10 which is an example of a disposable open diaper in a worn state. However, the illustration of the diaper wearer is omitted.

  The diaper 10 has a front waistline region 11, a rear waistline region 12, and a crotch region 13. A fastening tab portion 14 is attached to each of both side portions 41 of the rear waistline region 12. A target tape 16 that forms the target portion in the present invention is attached to the outer surface of the front waistline region 11. A hook member 17, which is a member of a mechanical fastener, is attached to the inner surface of the fastening tab portion 14. The target tape 16 is a loop member that is the other member of the mechanical fastener. The fastening tab portion 14 is detachably secured to the target tape 16 via a hook member 17. By the fastening, the front waistline region 11 and the rear waistline region 12 are connected in a tensioned state in the waistline direction, and the waistline opening 18 and a pair of leg hole openings 19 are formed in the diaper 10.

  FIG. 2 is a partial cutaway view of the diaper 10 in which the fastening tab 14 in FIG. 1 is detached from the target tape 16 and extended in a planar shape. The diaper 10 has a vertical direction and a horizontal direction, and the respective directions are indicated by double-headed arrows A and B. However, in the present invention, the vertical direction A is sometimes referred to as the front-rear direction A. The diaper 10 has a center line P that bisects the dimension in the lateral direction B, and is made symmetrical about the center line P.

The diaper 10 is worn by covering an absorbent body 20 formed by covering an hourglass core 20a (see FIG. 3) with a liquid-permeable wrapping sheet 20b such as tissue paper, and the inner surface side of the absorbent body 20. A liquid-permeable top sheet 23 facing the skin of the person, and a back sheet 24 covering the outer surface of the absorbent body 20 and facing the clothes of the wearer. The top sheet 23 is rectangular and extends from the periphery of the absorbent body 20. The back sheet 24 is formed of a liquid-impervious plastic film having a thickness of 0.01 to 0.03 mm as an example, and a rectangular first back sheet 24 a covering the outer surface of the absorbent body 20. And an hourglass-shaped second back sheet 24b formed of a nonwoven fabric of thermoplastic synthetic fibers, for example, a spunbonded nonwoven fabric having a mass per unit area of 15-40 g / m ² . The first back sheet 24a and the second back sheet 24b are joined via a hot melt adhesive (not shown) applied to substantially the whole of one of the opposing surfaces, and extend from the periphery of the absorbent body 20. I'm out. The top sheet 23 and the back sheet 24 overlap each other at a portion extending from the periphery of the absorbent body 20 and are joined via a hot melt adhesive (not shown).

  On both sides of the diaper 10 in the lateral direction B, leakproof portions 31 are formed of a water-repellent or liquid-impervious nonwoven fabric. The leak-proof part 31 includes an inner edge part 32 parallel to the center line P, an outer edge part 33 that forms a part of the peripheral part of the diaper 10 together with the back sheet 24, a front edge part 34, and a rear edge. Part 36. The outer edge 33, the front edge 34, and the rear edge 36 are joined to the top sheet 23 and the back sheet 24 via a hot melt adhesive (not shown). An elastic member 37 is attached to the inner edge portion 32 in an extended state. In the inner edge portion 32, the portion where the elastic member 37 is attached and the portion from the portion to the outer edge portion 33 are not joined to the top sheet 23, and the diaper 10 is in the state shown in FIG. In some cases, the elastic member 37 contracts to be separated from the top sheet 23 and form a pocket that opens toward the center line P in cooperation with the top sheet 23 to prevent side leakage of body fluid. . Between the outer edge portion 33 of the leak-proof portion 31 and the second backsheet 24b of the backsheet 24, there is interposed a leg-hole elastic member 38 extending in the longitudinal direction A in parallel with the center line P. .

  Fastening tab portions 14 are attached to both side portions 41 of the rear waistline region 12 of the diaper 10 thus formed. The fastening tab portion 14 is sandwiched between the second back sheet 24b and the leakage preventing portion 31, and joined to the second back sheet 24b and / or the leakage preventing portion 31 via a hot melt adhesive (not shown). A fixed portion 42 and an extending portion 43 extending in the lateral direction B from both side portions 41. A hook member 17 of a mechanical fastener is attached to the inner surface of the extension part 43. However, in the present invention, instead of using the fastening tab portion 14, both side portions 41 of the rear waistline region 12 are further extended in the lateral direction B to form wing portions that also function as tabs on the both side portions 41. The hook member 17 can also be attached to the inner surface of the wing portion. In the rear waistline region 12, a rear waistline elastic member 22 is interposed between the top sheet 23 and the backsheet 24, and a hot melt adhesive (at least one of these sheets 23, 24 is stretched in the lateral direction B). (Not shown).

  On the outer surface of the front waistline region 11 of the diaper 10 is attached a target tape 16 formed of a nonwoven fabric extending in the lateral direction B across the center line P. The target tape 16 is a loop member that can fix the hook member 17 in the fastening tab portion 14.

  FIG. 3 is a view showing a cross section taken along line III-III in FIG. 2. In FIG. 3, the absorbent body 20 is formed by covering a core material 20a formed of a water absorbent fiber such as pulverized pulp or a mixture of water absorbent fibers and a super absorbent polymer particle commonly used in the art with a wrapping sheet 20b. It is formed by. An example of a superabsorbent polymer particle is one made of a starch-acrylonitrile copolymer. The absorber 20 is sandwiched between a top sheet 23 and a back sheet 24. The back sheet 24 includes a first back sheet 24a and a second back sheet 24b formed of a nonwoven fabric bonded to the outer surface side of the first back sheet 24a. A target tape 16 is attached to the outer surface of the second back sheet 24b.

  FIG. 4 is a partially broken plan view of the absorbent body 20 showing the outer surface 47 of the absorbent body 20. The absorbent body 20 has an outer surface 47 and an inner surface 48 formed by the wrapping sheet 20 b, the outer surface 47 faces the back sheet 24, and the inner surface 48 faces the top sheet 23. The absorbent body 20 has both side edges 51, a front end edge 52, and a rear end edge 53. Both side edges 51 extend in the longitudinal direction A, and the front end edge 52 and the rear end edge 53 extend in the lateral direction B. Yes. The outer surface 47 is formed with a plurality of grooves 55 that meander in parallel but extend in the longitudinal direction A in parallel with each other. Further, between the adjacent two groove portions 55, for example, between the illustrated groove portions 55a and 55b, there are a peak portion 56 where the groove portion 55a is convex toward the other groove portion 55b, and a trough portion 57 which is concave. In addition, the groove portion 55b also has a mountain portion 56 and a valley portion 57, and the mountain portions 56 and the valley portions 57 face each other. The groove portions 55a and 55b are close to each other or in contact with each other at the peak portion 56 and the peak portion 56, and the close state is shown in the drawing. Further, the groove portions 55a and 55b form a portion 60 that is largely separated in the valley portion 57 and the valley portion 57. As is clear from the figure, between the adjacent two groove portions 55b and 55c, the reference numeral 56 in the groove portion 55b means a trough portion, and the reference symbol 57 means a mountain portion. Become.

  A hot melt adhesive 58 is formed on the outer surface 47 of the absorbent body 20 to form a joint portion between the absorbent body 20 and the back sheet 24. The hot melt adhesive 58 can be applied in a spiral shape, a wave shape, a dot shape, or the like using an appropriate coating machine. However, the hot melt adhesive 58 is intermittently arranged to form a row in the lateral direction B through the groove portion 55 at or near the portion 59 or the portion 59 that overlaps the target tape 16 via the back sheet 24. It is applied in a state. In the illustrated example, the hot melt adhesive 58 is applied in a dot-like manner to the portion 60 where the groove portions 55 are greatly separated by the valley portions 57 facing each other, and the hot melt adhesive 58 overlaps the groove portions 55. There is nothing. However, the hot melt adhesive 58 can be applied so as to draw a continuous line in the vertical direction A and the horizontal direction B at the part 59 and parts other than the vicinity thereof. The hot melt adhesive 58 at that time may intersect with the groove 55. However, the hot melt adhesive 58 located in the groove portion 55 is usually in a state of being separated from the first back sheet 24 a and does not affect the bonding between the absorber 20 and the back sheet 24. In the figure, the target tape 16 corresponding to the portion 59 is indicated by a virtual line.

  FIG. 4 also shows a partially enlarged view of the absorbent body 20. Each of the groove portions 55 has substantially straight portions 61 and 62 that connect the peak portion 56 and the valley portion 57, and each of the linear portions 61 and 62 with respect to a horizontal line H that is a line orthogonal to the center line P. The crossing angles α and β at the time of crossing have the same sign but opposite magnitudes, and are in the range of 45 to 65 degrees. The intersection angle α is an angle from the clockwise direction when the linear portion 61 intersects the horizontal line H to the horizontal line H, and the intersection angle β is from the counterclockwise direction when the linear portion 62 intersects the horizontal line H to the horizontal line H. It is an angle to go.

  It is preferable that the groove part 55 located in the site | part 59 is extended to the front end edge 52, in order to make the postscript deformation | transformation (refer FIG. 6) in the horizontal direction B of the absorber 20 easy. The groove 55 is preferably in the following state in the rear waistline region 12 of the core member 20 a having at least the portion 59. That is, when the dimension in the longitudinal direction A of the core material 20a in the rear waistline region 12 is in the range of 90-130 mm and the dimension in the lateral direction B is in the range of 100-140 mm, the dimension in the lateral direction B of the core material 20a. 10-15 strips of grooves 55 are formed with respect to the whole, and troughs 57 that are largely separated in the lateral direction B are present in 3-6 locations with respect to the overall dimension in the longitudinal direction A.

  These groove portions 55 in the absorbent body 20 are embossed by passing the core material 20a covered with the wrapping sheet 20b between a rotating roll having a convex portion for embossing and a rotating roll having a smooth peripheral surface. Can be obtained. It is preferable that the ridge portion has a width of 1-2 mm. The core material 20a can be embossed after being sprayed with tap water, warm water or water vapor together with the wrapping sheet 20b. By doing so, it becomes easy to obtain the groove 55 having a required depth and a clear shape. However, the width of the groove portion 55 is usually slightly larger than the width of the ridge portion.

  The groove portion 55 formed by embossing is a portion of the core material 20a of the absorbent body 20 that is particularly highly densified, and a diffusion path that facilitates diffusion of body fluid absorbed by the absorbent body 20. Acts as The fact that the groove portion 55 meanders rather than a straight line parallel to the center line P promotes the diffusion of the body fluid in the lateral direction B in the absorbent body 20, and the body fluid in a wide range of the absorbent body 20. Allows retention. Further, when the absorbent body includes superabsorbent polymer particles, when the diaper 10 is worn, it meanders that the particles move in the longitudinal direction A and the lateral direction B inside the absorbent body 20. This can be prevented by the groove 55.

  FIG. 5 is an enlarged view of the VV line cut surface of FIG. 1, and schematically shows a state where the fastening tab portion 14 is fixed to the target tape 16. The VV line also extends in the lateral direction B at the portion 59 shown in FIG. In FIG. 5, the first back sheet 24 a of the back sheet 24 is bonded to the outer surface 47 of the absorbent body 20 via a hot melt adhesive 58, and the top sheet 23 is bonded with a hot melt adhesive (not shown) on the inner surface 48. Are joined through. The entire surface or almost the entire surface of the second back sheet 24b is joined to the first back sheet 24a by welding with a hot melt adhesive (not shown) and / or hot embossing, and the target tape 16 is attached to the outer surface of the second back sheet 24b. Are bonded together by hot melt adhesive (not shown) and / or hot embossing. A hook member 35 in the fastening tab portion 14 is fixed to the target tape 16. The preferred hook member 35 has a dimension in the lateral direction B that is larger than the separation distance between the valleys 57 of the two adjacent groove portions 55, and the target at a position 59 (see FIG. 4) that overlaps the hot melt adhesive 58. In addition to fixing to the tape 16, it can be fixed to the target tape 16 even at a position where it does not overlap with the hot melt adhesive 58. The target tape 16 is made of a non-woven fabric, more preferably a non-woven fabric such as the illustrated example in which crimped fibers obtained by heat-treating a sheath and core type or side-by-side type composite fiber are entangled with each other. Is formed. As is clear in FIG. 4, the target tape 16 has a length that extends across the absorbent body 20 to the outside of the absorbent body 20, and therefore, a plurality of joint sites between the absorbent body 20 and the backsheet 24. And has a length that crosses the plurality of grooves 55. The dimension extending in the longitudinal direction A of the target tape 16 is the width dimension of the target tape 16, and the width is the front end edge 52 of the absorber 20 in the wide portion 60 formed by the grooves 55. The width of the region 60 is sufficient to cover one row of wide portions 60 or two rows of wide portions 60 aligned in the lateral direction B in parallel with the front edge 52 (see FIG. 4).

  FIG. 6 schematically shows a state when the peeling force Y in the direction indicated by the arrow for peeling the fastening tab portion 14 from the target tape 16 acts on the fastening tab portion 14 of FIG. When the peeling force Y acts, the gripping area of the hook 39 of the hook member 35 that is fixed to the target tape 16 between the hot melt adhesive 58a and the hot melt adhesive 58b adjacent to each other through the groove 55 is held. The hook 39a located at a position adjacent to 35a pulls the target tape 16 and the back sheet 24 bonded thereto upward and lifts the target tape 16 in an attempt to be detached from the target tape 16. The absorbent body 20 is also pulled by the back sheet 24 to reduce the width of the groove 55, in other words, the direction indicated by the arrow X so as to reduce the distance between the hot melt adhesive 58a and the hot melt adhesive 58b. And is deformed so as to be convex downward in the figure. Along with the deformation, the target tape 16 is deformed so as to protrude upward together with the back sheet 24 as shown in the figure, and follows the hook 39a to be detached. Thereafter, when the peeling force Y further acts and the target tape 16 cannot follow the movement of the hook 39a, the hook member 35 as a whole is detached from the target tape 16 including the hook 39a. When the groove portion 55 extends to the front end edge 52 of the absorbent body 20 (see FIG. 4), the groove portion 55 can easily move so as to reduce its width. That is, the absorber 20 can be easily moved in the arrow X direction.

  Thus, the presence of the groove portion 55 facilitates the movement and deformation of the absorbent body 20 in the direction indicated by the arrow X, and facilitates the backsheet 24 and the target tape 16 to follow the fastening tab portion 14. This means that the fastening tab portion 14 is not immediately detached from the target tape 16 even if a peeling force acts on the fastening tab portion 14. This also means that the fastening tab portion 14 can be easily and unexpectedly detached from the target tape 16 even if an unintended peeling force acts on the fastening tab portion 14 due to movement of the body of the diaper wearer. It means not.

  FIG. 7 is a view similar to FIG. 4 showing an example of the embodiment, and the same reference numerals as those in FIG. 4 are used for portions common to the absorbent body 20 in FIG. In the outer surface 47 of the absorbent body 20 in FIG. 7, a large number of grooves 160 are formed that extend in a straight line and obliquely intersecting the center line P. The groove portion 160 includes a groove portion 160a having an upper right inclination in the drawing and a groove portion 160b having an upward left inclination, and the groove portions 160a and 160b intersect each other. Also in such an absorbent body 20, as indicated by a chain line, the grooves 155 meandering in the longitudinal direction A and parallel to each other, and the adjacent two grooves 155a and 155b are 156 and the valley 157 can be regarded as being formed. However, the peak portions 156 in this case are in contact with or overlapping each other.

  The present invention can also be implemented in such a manner that the fastening tab portion 14 is formed in the front waistline region 11 and the target tape 16 is formed in the rear waistline region 12.

  The present invention described above can be organized as follows at least.

A front waistline region and a rear region having a longitudinal direction and a lateral direction, wherein an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and is opposed to each other through the crotch region in the longitudinal direction. A fastening tab portion including a hook member of a mechanical fastener is formed on both sides of the waistline region, and the other surface of the front waistline region and the back waistline region is the outer surface of the back seat. A disposable open-type diaper in which a target portion that is a loop member of the mechanical fastener on which the hook member is detachable is formed,
On the surface of the absorbent body facing the back sheet, a plurality of groove portions extending meandering in the longitudinal direction and parallel to each other are formed,
The two groove portions adjacent to each other in the lateral direction are formed with a peak portion that is convex from one side of the groove portion to the other and a trough portion that is concave, and the two groove portions are formed in the horizontal direction. While being greatly separated between the valleys facing each other in the direction, it is in a state of approaching or contacting between the mountain parts facing in the lateral direction,
The absorbent body is coated with a hot-melt adhesive that forms a bonding site with the back sheet between the valleys that are largely separated from each other, and the bonding site is formed through the groove in the lateral direction. Lined up intermittently,
The target portion is formed of a nonwoven fabric extending in the lateral direction, has a length that overlaps a plurality of the joint portions that are intermittently arranged, and is joined to the backsheet in a state of crossing a plurality of the grooves. ing.

The present invention includes at least the following embodiments.
(1) The back sheet is formed of a liquid-impermeable plastic film bonded to the absorber and a nonwoven fabric bonded to the outer surface of the plastic film, and the target portion forms the back sheet. Bonded to the nonwoven fabric.
(2) As for the said hook member, the said dimension of the said horizontal direction is larger than the distance between the said trough parts in the said two groove parts.
(3) The plurality of grooves extending in a meandering manner in the vertical direction and in contact with each other between the crests bisect the lateral dimension of the diaper on the outer surface of the absorber. A plurality of first grooves that are parallel to each other in a range of 45-65 degrees in the clockwise direction with a line perpendicular to the vertical center line, and 45-65 degrees in the counterclockwise angle between the orthogonal lines and the orthogonal line. A plurality of second grooves that are in parallel with each other and intersect with each other.
(4) The absorber has a longitudinal dimension in a range of 90-130 mm and a lateral dimension in a range of 100-140 mm in at least one of the front waistline area and the rear waistline area. 10-15 strips are formed with respect to the entire dimension in the lateral direction, and the valley portions that are largely separated are formed in 3-6 locations with respect to the entire dimension in the longitudinal direction. Has been.

10 Diaper 11 Front waist area 12 Rear waist area 13 Inseam area 14 Fastening tab (fastening tape)
16 Target part (target tape)
17 Hook member 20 Absorber 23 Top sheet 24 Back sheet 24a Plastic film (first back sheet)
24b Nonwoven fabric (second backsheet)
41 Side 47 Opposite surface (outer surface)
55, 55a, 55b Groove portion 56 Mountain portion 57 Valley portion 58, 58a, 58b Hot melt adhesive 155 Groove portion 155a First groove portion 155b Second groove portion 156 Mountain portion 157 Valley portion A Vertical direction B Horizontal direction P Vertical center line α Intersection angle β Crossing angle

Claims (5)

A front waistline region and a rear region having a longitudinal direction and a lateral direction, wherein an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and is opposed to each other through the crotch region in the longitudinal direction. A fastening tab portion including a hook member of a mechanical fastener is formed on both sides of the waistline region, and the other surface of the front waistline region and the back waistline region is the outer surface of the back seat. A disposable open-type diaper in which a target portion that is a loop member of the mechanical fastener on which the hook member is detachable is formed,
On the surface of the absorbent body facing the back sheet, a plurality of groove portions extending meandering in the longitudinal direction and parallel to each other are formed,
The two groove portions adjacent to each other in the lateral direction are formed with a peak portion that is convex from one side of the groove portion to the other and a trough portion that is concave, and the two groove portions are formed in the horizontal direction. While being greatly separated between the valleys facing each other in the direction, it is in a state of approaching or contacting between the mountain parts facing in the lateral direction,
The absorbent body is coated with a hot-melt adhesive that forms a bonding site with the back sheet between the valleys that are largely separated from each other, and the bonding site is formed through the groove in the lateral direction. Lined up intermittently,
The target portion is formed of a nonwoven fabric extending in the lateral direction, has a length that overlaps a plurality of the joint portions that are intermittently arranged, and is joined to the backsheet in a state of crossing a plurality of the grooves. The said diaper characterized by the above-mentioned.   The back sheet is formed of a liquid-impermeable plastic film bonded to the absorber and a nonwoven fabric bonded to the outer surface of the plastic film, and the target portion forms the back sheet. The diaper according to claim 1 joined to the nonwoven fabric.   The diaper according to claim 1 or 2, wherein the hook member has a dimension in the lateral direction larger than a distance between the valleys in the two groove portions.   The plurality of grooves extending in a meandering manner in the longitudinal direction and in contact with each other between the peaks are longitudinal centers that bisect the lateral dimension of the diaper on the outer surface of the absorber. A plurality of parallel first groove portions having a clockwise crossing angle with a line perpendicular to the line in a range of 45-65 degrees and a counterclockwise crossing angle with the orthogonal line in a range of 45-65 degrees. The diaper according to any one of claims 1 to 3, wherein the diaper is formed by intersecting a plurality of parallel second grooves.   The absorbent body has a longitudinal dimension in a range of 90-130 mm and a lateral dimension in a range of 100-140 mm in at least one of the front waistline and the rear waistline. The groove portion is formed with 10-15 strips with respect to the entire dimension in the lateral direction, and the greatly spaced valley portions are formed with 3-6 locations with respect to the entire dimension in the longitudinal direction. The diaper in any one of Claims 1-4.