JP6744211B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

BACKGROUND ART Absorbent articles such as disposable diapers and urine pads are known to be provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and a vertically long absorber disposed between both sheets. .. For example, in Patent Document 1, a waterproof outer jacket, a water-absorbing pad that enters inside the outer edge of the waterproof outer jacket so as to leave side edges on each side and is fixed inside the outer jacket, Disposable diapers for children and adults with incontinence are described, which include an outer cover and an inner water-absorbing sheet that overlaps the inner surface of the water-absorbing pad. Further, FIG. 1 of Patent Document 1 shows that the water absorbing pad and the waterproof casing are joined together by an adhesive coated in a stripe shape.

In addition, as an absorbent body included in an absorbent article, one having an absorbent core that absorbs excretory liquid such as urine and a core wrap sheet that covers the absorbent core is known. The present applicant previously has an absorbent core containing an absorbent polymer and a coating material that wraps the absorbent core, and the skin side coating material on the skin facing surface side of the coating material and the skin facing surface of the absorbent core. The surface is fixed via a skin-side adhesive, and the non-skin side covering material on the non-skin facing surface side of the covering material and the non-skin facing surface of the absorbent core are fixed via a non-skin side adhesive. There is proposed an absorbent article including the absorbing body (Patent Document 2).

JP-A-01-118605 JP, 2014-100307, A

The absorbent body of the absorbent article is required to have a high absorption capacity capable of absorbing a large amount of urine, even when the absorbent article is used for a long time such as at night. However, Patent Document 1 does not disclose a configuration for improving the absorption capacity of the absorber. Moreover, the absorbent article of Patent Document 2 has room for improvement in the absorbent capacity of the absorbent body.

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

The present invention is a longitudinal absorbent article that includes a top sheet, an absorber, and a back sheet, and has a longitudinal direction and a width direction that is orthogonal to the longitudinal direction, wherein the absorber covers the absorbent core and the absorbent core. The lower core wrap sheet, which has a core wrap sheet and is located on the non-skin facing surface side of the absorbent core, has a non-skin of the absorbent core through a first adhesive arranged in a stripe shape. The lower core wrap sheet is bonded to the facing surface and is bonded to the skin-facing surface of the back sheet via a second adhesive arranged in a stripe shape, and the lower core wrap sheet is the absorbent core and the back surface. The absorbent article has a plurality of non-adhesive portions in the width direction that are not adhered to any of the sheets, and each of the plurality of non-adhesive portions extends in the longitudinal direction.

According to the absorbent article of the present invention, the absorbing ability of the absorber can be improved.

FIG. 1 is a perspective view of a disposable diaper as an embodiment of the present invention. FIG. 2 is a plan view showing a developed state in which the disposable diaper shown in FIG. 1 is expanded in a plane. FIG. 3 is a cross-sectional view schematically showing a cross section taken along the line I-I of FIG. 2. FIG. 4 is a plan view showing a joined state with the first to third adhesives according to the present invention. 5A to 5D are views showing the arrangement of the first to third adhesives according to the present invention. FIG. 6A is a diagram showing a non-adhesive portion according to the present invention, and FIG. 6B is a diagram showing an overlap between the non-adhesive portion and the third adhesive non-arrangement portion. FIG. 7: is explanatory drawing explaining the effect of the absorbent article of this invention.

The present invention will be described below based on its preferred embodiments with reference to the drawings.
1, 2 and 3 show a basic structure of a disposable diaper 1 (hereinafter, also simply referred to as a diaper 1) which is an embodiment of the absorbent article of the present invention.
As shown in FIGS. 2 and 3, the diaper 1 includes a topsheet 12, an absorber 11 and a backsheet 15. The topsheet 12 forms the skin-facing surface of the diaper 1, and the backsheet 15 forms the non-skin-facing surface of the diaper 1. The absorber 11 is arranged between the topsheet 12 and the backsheet 15 in the thickness direction of the diaper 1.
The skin-facing surface is a surface of the absorbent article or its constituent member that is directed toward the skin side of the wearer when worn, and the non-skin-facing surface is the absorbent article or its constituent member that is the skin side of the wearer when worn. Is the surface facing away from.

The diaper 1 (absorbent article) has a vertically long shape, and is orthogonal to the longitudinal direction X (longitudinal direction) when the diaper 1 is spread in a plane as shown in FIG. And the width direction Y is set. The longitudinal direction X of the diaper 1 is a direction corresponding to the front-back direction of the wearer when worn.
The diaper 1 is arranged in the longitudinal direction X in a ventral side A located on the ventral side of the wearer when worn, a dorsal side B located on the dorsal side, and between the ventral side A and the dorsal side B. It has a crotch part C. The diaper 1 has a structure in which the left and right sides of a center line CL that divides the diaper 1 into two parts in the width direction Y and extends in the longitudinal direction X are line-symmetric with respect to the center line CL (see FIG. 2 ). ).
The diaper 1 is a deployable disposable diaper, and has fastening tapes 7 provided on both side edges of the back side portion B, and a landing zone 8 for fixing the fastening tapes 7 to the outer surface of the ventral side portion A. Is provided.

Seats 16 for forming a three-dimensional gather having elastic members 16a are arranged on both sides of the longitudinal direction X of the diaper 1, and the contraction of the elastic members 16a causes the crotch portion C in the worn state to contact the wearer's skin side. A three-dimensional gather standing upright is formed. In addition, the leg elastic members 17 are arranged in a stretched state in the region of the crotch C arranged around the legs, and the contraction thereof allows the crotch C in the worn state to fit the wearer's legs around. A leg gather is formed to improve the.

The absorbent body 11 of the diaper 1 has an absorbent core 13 and a core wrap sheet 14 that covers the absorbent core 13. The absorptive core 13 can be made of, for example, a mixed laminated fiber of liquid-absorbent polymer and liquid-absorbent fiber such as pulp fiber. Examples of the liquid absorbing fibers include pulp fibers, rayon fibers, cotton fibers, and cellulosic hydrophilic fibers such as cellulose acetate. In addition to cellulosic hydrophilic fibers, fibers made of synthetic resin such as polyolefin, polyester, polyamide, etc., which have been hydrophilized with a surfactant or the like can also be used. Cellulose hydrophilic fibers and synthetic fibers made of thermoplastic resin or the like can be used together.
Examples of the water-absorbing polymer include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked product, (starch-acrylic acid) graft copolymer, (isobutylene-maleic anhydride) copolymer. Examples thereof include polymers, saponified products thereof, and polyaspartic acid. As the water-absorbent polymer, a polymer capable of absorbing 20 times the weight of water, preferably 30 times or more the weight of water is preferably used.

As shown in FIG. 3, the core wrap sheet 14 of the diaper 1 includes an upper core wrap sheet 14a located on the skin facing surface side of the absorbent core 13, and a lower core wrap sheet 14b located on the non-skin facing surface side. have. As the core wrap sheet 14, for example, tissue paper or a water-permeable nonwoven fabric is used. The upper core wrap sheet 14a and the lower core wrap sheet 14b may be one continuous sheet or may be separate sheets. One core wrap sheet 14 may wrap the entire absorbent core 13, or two or more core wrap sheets 14 may be combined to wrap the absorbent core 13.

The lower core wrap sheet 14b is bonded to the non-skin facing surface of the absorbent core 13 via the first adhesive 2, and is bonded to the skin facing surface of the back sheet 15 via the second adhesive 3. ing. The first adhesive 2 is an adhesive that joins the non-skin facing surfaces of the lower core wrap sheet 14b and the absorbent core 13, and the second adhesive 3 is the skin of the lower core wrap sheet 14b and the back sheet 15. It is an adhesive that joins the opposing surfaces. In addition, the second adhesive 3 may be arranged in the same pattern in the extending portion beyond the side edge in the width direction Y and the end edge in the longitudinal direction X of the lower core wrap sheet 14b. In this case, the second adhesive 3 joins the skin-facing surface of the backsheet 15 to either one or both of the topsheet 12 and the three-dimensional gather forming sheet 16 at the extended portion. Note that the first adhesive 2 and the second adhesive 3 are terms used for convenience in describing the present invention, and the same adhesive is used for the first adhesive 2 and the second adhesive 3. Alternatively, different types of adhesives may be used.

As shown in FIG. 3, the diaper 1 has a backsheet 15 on the non-skin facing surface side of the lower core wrap sheet 14b. The back sheet 15 of the diaper 1 is a laminate of a leak-proof sheet 15a made of a liquid-impermeable or liquid-impermeable resin film and an exterior nonwoven fabric 15b covering the non-skin-facing surface of the leak-proof sheet 15a. .. The back sheet 15 in the present invention may be composed of only the leak preventive sheet 15a.

The first adhesive 2 is arranged in stripes as shown in FIGS. 3 and 4. Specifically, between the lower core wrap sheet 14b and the non-skin-facing surface of the absorbent core 13, the first adhesive placement portion 20 in which the first adhesive 2 is placed and the first adhesive 2 are The first adhesive non-arrangement portions 25 that are not arranged extend alternately in the width direction Y and in the longitudinal direction X, respectively. Similarly, the second adhesive 3 is also arranged in stripes. Specifically, between the lower core wrap sheet 14b and the back sheet 15, the second adhesive placement portion 30 on which the second adhesive 3 is placed and the second adhesive placement section 30 on which the second adhesive 3 is not placed The adhesive non-arranged portions 35 extend alternately in the width direction Y and in the longitudinal direction X, respectively. The length of the first adhesive placement portion 20 and the length of the second adhesive placement portion 30 in the width direction Y may or may not be constant, but as in the present embodiment. , Preferably constant. Further, the length of the first adhesive non-disposing portion 25 and the length of the second adhesive non-disposing portion 35 in the width direction Y may be constant as shown in FIG. 3 and FIG. However, as in the present embodiment, it is preferably constant.

The lower core wrap sheet 14b has a plurality of non-adhesive portions 5 in the width direction Y that are not adhered to either the absorbent core 13 or the back sheet 15. Specifically, the non-adhesive part 5 is a part where the first adhesive non-disposing part 25 and the second adhesive non-disposing part 35 of the diaper 1 overlap, and the part is the first adhesive 2 and the second adhesive non-disposing part 35. None of the adhesive 3 is present. In addition, the plurality of non-adhesive portions 5 respectively extend in the longitudinal direction X, similarly to the first adhesive non-disposing portion 25 and the second adhesive non-disposing portion 35.

The non-adhesive portion 5 of the lower core wrap sheet 14b is a portion that does not overlap the first adhesive placement portion 20 and does not overlap the second adhesive placement portion 30, and is formed to extend in the longitudinal direction X. It is sufficient that the first adhesive non-disposing portion 25 and the second adhesive non-disposing portion 35 overlap with each other. That is, the non-adhesive part 5 is provided at any part between the first adhesive placement parts 20 and between the second adhesive placement parts 30 and between the first adhesive placement part 20 and the second adhesive part 30. It may be formed.
For example, like the left non-adhesive portion 5 in FIG. 6A, the first adhesive non-disposing portion 25 and the second adhesive non-disposing portion 35 are completely overlapped to form the non-adhesive portion 5. Is also good. Completely overlapping the first adhesive non-disposing portion 25 and the second adhesive non-disposing portion 35 means that one of both end portions of the first adhesive non-disposing portion 25 in the width direction Y and the second adhesive non-disposing portion When one of both ends of the portion 35 is completely coincident with each other, and both ends of the one adhesive non-arrangement portion in the width direction Y extend outward more than both sides of the other adhesive non-arrangement portion. Both cases are included.
Further, as in the non-adhesive portion 5 on the right side of FIG. 6A, the non-adhesive portion 5 may be formed by partially overlapping the adhesive non-disposing portions 25 and 35. In this case, the non-adhesive portions 5 are formed on both sides of the first adhesive placement portion 20 or the second adhesive placement portion 30 in the width direction Y.

According to the diaper 1 of the present embodiment, the lower core wrap sheet 14b has the non-adhesive portion 5 that is not joined to either the absorbent core 13 or the back sheet 15, and thus the lower core wrap sheet 14b. 14b easily extends in the width direction Y, and when the absorbent body 11 absorbs the excreted liquid, the absorbent body 11 as a whole easily swells (see FIG. 7), which is a phenomenon in which the swelling of the water-absorbent polymer or the absorbent body is inhibited Inhibition is less likely to occur. Therefore, the absorption capacity of the absorbent polymer is effectively used, and the absorbent body 11 exhibits excellent absorption performance.
On the other hand, when the whole surface of the skin facing surface or the non-skin facing surface of the lower core wrap sheet 14b is solidly coated with the adhesive, the absorbent body 11 is unlikely to swell, or swelling of the water-absorbent polymer is inhibited, and In some cases, the water absorbing polymer in the body 11 may not be able to exhibit its full absorption capability.

The first adhesive 2 is arranged from the viewpoint that each member of the absorbent core 13, the lower core wrap sheet 14b, and the back sheet 15 efficiently extends in the width direction Y, and that the non-adhesive portion 5 is easily formed. The first adhesive placement portion 20 preferably has a shorter placement pitch in the width direction Y than the second adhesive placement portion 30 on which the second adhesive 3 is placed. The length of the arrangement pitch Pa of the first adhesive placement portion 20 is, as shown in FIG. 5A, the length Wa of the first adhesive placement portion 20 and the length of the adhesive non-placement portion 25 in the width direction Y. It is the total length of Sa. Further, the length of the arrangement pitch Pb of the second adhesive placement portion 30 is, as shown in FIG. 5B, the length Wb of the adhesive placement portion 30 and the length of the adhesive non-placement portion 35 in the width direction Y. It is the total length of Db.

The arrangement pitch Pa of the first adhesive placement portion 20 (see FIG. 5A) is preferably 10% or more with respect to the arrangement pitch Pb of the second adhesive placement portion 30 (see FIG. 5B). It is more preferably 15% or more, preferably 85% or less, more preferably 50% or less, and preferably 10% or more and 85% or less, more preferably 15% or more and 50% or less.
The difference between the arrangement pitch Pa of the first adhesive placement portion 20 (see FIG. 5A) and the placement pitch Pb of the second adhesive placement portion 30 (see FIG. 5B) is preferably 1 mm or more, It is more preferably 10 mm or more, preferably 45 mm or less, more preferably 35 mm or less, and preferably 1 mm or more and 45 mm or less, more preferably 10 mm or more and 35 mm or less.

From the same viewpoint, the first adhesive placement portion 20 preferably has a longer length in the width direction Y than the second adhesive placement portion 30.
The length Wa of the first adhesive placement portion 20 in the width direction Y (see FIG. 5A) is compared with the length Wb of the second adhesive placement portion 30 in the width direction Y (see FIG. 5B). It is preferably 120% or more, more preferably 150% or more, preferably 400% or less, more preferably 300% or less, and preferably 120% or more and 400% or less, more preferably 150% or more 300. % Or less.
A length Wa of the first adhesive placement portion 20 in the width direction Y (see FIG. 5A) and a length Wb of the second adhesive placement portion 30 in the width direction Y (see FIG. 5B). The difference is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 3.0 mm or less, more preferably 2.5 mm or less, and preferably 0.5 mm or more and 3.0 mm or less, It is more preferably 1.0 mm or more and 2.5 mm or less.

The first stripe arrangement region 21 is a region in which the first adhesive 2 is arranged in a stripe shape, and is a region including the first adhesive arrangement portion 20 and the first adhesive non-arrangement portion 25.
From the viewpoint of suppressing swelling inhibition of the absorbent body 11 and balancing the bonding strength between the absorbent core 13 and the lower core wrap sheet 14b, the first adhesive 2 is preferably arranged in the following dimensions.
The length W1 (see FIG. 4) of the first stripe arrangement region 21 in the width direction Y is preferably the same as the maximum length W13 (see FIG. 4) of the absorbent core 13 in the same direction Y. Here, "is the same" means that the ratio of the length W1 of the first stripe arrangement region 21 in the width direction Y to the maximum length W13 of the absorbent core 13 in the same direction Y is within 10%. Say. Further, the length L1 (see FIG. 4) of the first stripe arrangement region 21 in the longitudinal direction X is preferably the same as the total length L13 (see FIG. 4) of the absorbent core 13 in the same direction X. Here, "is the same" means that the ratio of the length L1 of the first stripe arrangement region 21 in the longitudinal direction X to the total length L13 of the absorbent core 13 in the same direction X is within 10%. ..

The length Wa (see FIG. 5A) of the first adhesive placement portion 20 in the width direction Y is preferably 20% or more, more preferably 30%, with respect to the placement pitch Pa of the first adhesive placement portion 20. % Or more, preferably 80% or less, more preferably 70% or less, and preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.
The length Wa (see FIG. 5A) of the first adhesive placement portion 20 in the width direction Y is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 5.0 mm or less. It is more preferably 4.0 mm or less, preferably 1.0 mm or more and 5.0 mm or less, and more preferably 1.5 mm or more and 4.0 mm or less.
The length Da (see FIG. 5A) of the first adhesive non-arrangement portion 25 in the width direction Y is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 5.0 mm or less. , And more preferably 4.0 mm or less, preferably 0.5 mm or more and 5.0 mm or less, and more preferably 1.0 mm or more and 4.0 mm or less.

The second stripe arrangement region 31 is a region in which the second adhesive 3 is arranged in a stripe shape, and is a region including the second adhesive arrangement portion 30 and the second adhesive non-arrangement portion 35. As described above, the second adhesive 3 may be arranged in the same pattern in the extending portion beyond the side edge of the lower core wrap sheet 14b in the width direction Y, but in this case, the lower core wrap sheet. The second stripe arrangement area 31 includes not only the portion overlapping with 14b but also the second adhesive arrangement portion 30 arranged across the side edge of the lower core wrap sheet 14b in the width direction Y.

From the viewpoint of suppressing the swelling of the absorbent body 11 and balancing the bonding strength between the lower core wrap sheet 14b and the back sheet 15, the second adhesive 3 is preferably arranged in the following range and dimensions.
The second stripe arrangement region 31 preferably extends over the entire area of the lower core wrap sheet 14b in the width direction Y, and more preferably extends outside the lower core wrap sheet 14b in the width direction Y. .. The length W2 (see FIG. 4) of the second stripe arrangement region 31 in the width direction Y is preferably longer than the maximum length W14b (see FIG. 4) of the lower core wrap sheet 14b in the same direction Y. In addition, the second stripe arrangement region 31 preferably extends over the entire length of the lower core wrap sheet 14b in the longitudinal direction X, and extends outside the lower core wrap sheet 14b in the longitudinal direction X. More preferable. The length L2 (see FIG. 4) of the second stripe arrangement region 31 in the longitudinal direction X is preferably longer than the total length L14b (see FIG. 4) of the lower core wrap sheet 14b in the same direction X, and in the same direction X. More preferably, it is equal to the total length of the leak-proof sheet 15a, and even more preferably equal to the total length of the absorbent article in the same direction X.

The length Wb of the second adhesive placement portion 30 in the width direction Y (see FIG. 5B) is preferably 2.5% or more, more preferably the placement pitch Pb of the second adhesive placement portion 30. Is 3% or more, preferably 15% or less, more preferably 10% or less, and preferably 2.5% or more and 15% or less, more preferably 3% or more and 10% or less.
The length Wb of the second adhesive placement portion 30 in the width direction Y [see FIG. 5(b)] is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 3.0 mm or less, It is more preferably 2.5 mm or less, preferably 0.5 mm or more and 3.0 mm or less, and more preferably 1.0 mm or more and 2.5 mm or less.
The length Db of the second adhesive non-arrangement portion 35 in the width direction Y (see FIG. 5B) is preferably 3 mm or more, more preferably 5 mm or more, and preferably 50 mm or less, more preferably 40 mm or less. And preferably 3 mm or more and 50 mm or less, more preferably 5 mm or more and 40 mm or less.

From the viewpoint of further suppressing swelling of the absorbent body 11, the length W5 of the non-adhesive portion 5 in the width direction Y (see FIG. 6A) is the length of the first adhesive non-disposing portion 25 in the width direction Y. With respect to Da [see FIG. 6(a)], it is preferably 20% or more, more preferably 40% or more, preferably 100% or less, more preferably 80% or less, and preferably 20% or more. It is 100% or less, more preferably 40% or more and 80% or less.
Further, the sum of the lengths W5 (see FIG. 6A) of the non-adhesive portions 5 in the width direction Y is the length Db of the second adhesive non-disposing portions 35 in the width direction Y (see FIG. 6A). Is preferably 15% or more, more preferably 25% or more, preferably 75% or less, more preferably 65% or less, and preferably 15% or more and 75% or less, more preferably It is 25% or more and 65% or less.
The length W5 of the non-adhesive portion 5 in the width direction Y [see FIG. 6(a)] is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 4.0 mm or less, more preferably It is 2.5 mm or less, preferably 0.5 mm or more and 4.0 mm or less, and more preferably 1.0 mm or more and 2.5 mm or less.

From the same viewpoint, the non-adhesive portion 5 preferably extends continuously in the longitudinal direction X over the entire length of the absorbent body 11, and more preferably equal to the entire length of the absorbent article. When the length of the first adhesive 2 and the second adhesive 3 in the longitudinal direction X is shorter than the total length of the absorbent article (diaper 1), the length of the edges of both adhesives 2 and 3 in the longitudinal direction X is smaller than that of the edges. A portion that extends outward, that is, a portion where both adhesives 2 and 3 do not exist in the width direction Y is continuous with the first adhesive non-disposing portion 25 and the second adhesive non-disposing portion 35, and is the non-adhesive portion. 5 may be achieved.

The second adhesive 3 in the diaper 1 has a weak adhesive 3a and a strong adhesive 3b which are arranged in mutually different parts. As the second adhesive 3, it is possible to use a plurality of types of adhesives that bond the lower core wrap sheet and the back sheet with different adhesive strengths. For example, as the second adhesive, the adhesive disposed in the central region in the width direction Y and the adhesive disposed in each of the lateral regions sandwiching the central region have different adhesive strengths when wet. Is preferable, and it is more preferable to dispose an adhesive having a stronger adhesive strength when wet than the adhesive arranged in the central region in each of the side regions. With such a configuration, when the absorbent body 11 is moistened with the excreted liquid, the central portion of the absorbent body 11 in the width direction Y can be easily extended in the width direction Y, and swelling inhibition of the absorbent body 11 can be further suppressed. .. The adhesive strength when wet assumes the adhesive strength when the absorbent body 11 is in contact with the excreted liquid and is wet. The magnitude of the adhesive strength when wet is confirmed by the method described below.

<Adhesive strength confirmation test>
An arbitrary portion where the absorbent core 13 is present is cut along the width direction Y of the diaper 1, and water is gradually impregnated with a spray around the portion corresponding to the lower core wrap sheet 14b of the cut surface. A force is applied in the direction in which the lower core wrap sheet 14b and the back sheet 15 are peeled off, and it is confirmed whether or not the lower core wrap sheet 14b and the back sheet 15 can be peeled without breakage. increase. This operation is repeated until the lower core wrap sheet 14b and the back sheet 15 are completely peeled off. The magnitude of the adhesive strength when wet can be judged by the amount of water impregnated when the lower core wrap sheet 14b and the back sheet 15 are completely peeled off.
In this method, peeling between the lower core wrap sheet 14b and the back sheet 15 occurs in the area where the weak adhesive 3a is placed with a smaller amount of water impregnation than in the area where the strong adhesive 3b is placed.

The weak adhesive 3a is preferably arranged in the central region M of the lower core wrap sheet 14b in the width direction Y, but the central region M is the maximum length W14b of the lower core wrap sheet 14b in the width direction Y. Is preferably divided into three areas and divided into three areas.
Further, the strong adhesive 3b is preferably arranged in two areas on both sides when the maximum length W14b of the lower core wrap sheet 14b in the width direction Y is equally divided into three areas.

The back sheet 15 of the diaper 1 includes a leak-proof sheet 15a and an exterior nonwoven fabric 15b. As shown in FIGS. 3 and 4, the leak-proof sheet 15a and the exterior nonwoven fabric 15b are joined together via the third adhesive 4 arranged in stripes. The third adhesive 4 is an adhesive that joins the leak-proof sheet 15a and the exterior nonwoven fabric 15b. The third adhesive is also a term used for convenience in describing the present invention, and the same adhesive as the first adhesive or the second adhesive described above may be used as the third adhesive, or different. A type of adhesive may be used.

The third adhesive 4 has a plurality of third adhesive placement portions 40, on which the third adhesive 4 is placed, spaced in the width direction Y. That is, the third adhesive placement portion 40 and the third adhesive non-placement portion 45 in which the third adhesive 4 is not placed are formed alternately in the width direction Y and extend in the longitudinal direction X, respectively. There is. As shown in FIGS. 3 and 4, the third adhesive placement portion 40 may or may not have a constant interval between the third adhesive placement portions 40, but as in the present embodiment. Moreover, it is preferable that it is constant. The third adhesive non-arrangement portion 45 exists between the third adhesive arrangement portions 40, and the leak-proof sheet 15a and the exterior nonwoven fabric 15b are not joined at that portion. Hereinafter, a region including the third adhesive placement portion 40 and the third adhesive non-placement portion 45, which is a region where the third adhesive 4 is arranged in a stripe shape, is also referred to as a third stripe placement region 41.

As described above, when the leakproof sheet 15a and the exterior nonwoven fabric 15b are joined by the third adhesive 4 arranged in stripes, the exterior nonwoven fabric 15b and the exterior nonwoven fabric 15b are protected during wearing (wearing) or during wearing. It is possible to soften the texture of the exterior nonwoven fabric 15b, especially the non-skin-facing surface of the exterior nonwoven fabric 15b, while maintaining the bonding strength with the leak sheet 15a. In addition, when a leak proof sheet having moisture permeability is used as the leak preventive sheet 15a, it is possible to suppress a decrease in moisture permeability, so that the diaper 1 can be prevented from getting stuffy.

Further, when the third adhesive non-arrangement portion 45 and the non-adhesive portion 5 described above overlap each other in a plan view of the diaper 1 (absorbent article), the above-described swelling inhibition of the absorbent body 11 can be further suppressed. it can. Hereinafter, the portion where the third adhesive non-disposing portion 45 and the non-adhesive portion 5 overlap each other is also referred to as a non-adhesive overlapping portion 6. None of the first adhesive 2, the second adhesive 3, and the third adhesive 4 are present in the non-adhesion overlapping portion 6.

From the viewpoint of more reliably producing the above effect, the length W6 of the non-bonding overlapping portion 6 in the width direction Y (see FIG. 6B) is the length W5 of the non-bonding portion 5 in the width direction Y [FIG. 6]. With respect to (b)], preferably 20% or more, more preferably 40% or more, preferably 100% or less, more preferably 80% or less, and preferably 20% or more and 100% or less, It is more preferably 40% or more and 80% or less.
In addition, the length W6 of the non-adhesion overlapping portion 6 in the width direction Y (see FIG. 6B) is the same as the length Dc of the third adhesive non-disposing portion 45 in the width direction Y (see FIG. 6B). On the other hand, it is preferably 20% or more, more preferably 30% or more, preferably 100% or less, more preferably 70% or less, and preferably 20% or more and 100% or less, more preferably 30% or more. It is 70% or less.
Further, the length W6 of the non-adhesion overlapping part 6 in the width direction Y [see FIG. 6(b)] is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 3.5 mm or less, It is more preferably 2.0 mm or less, preferably 0.5 mm or more and 3.5 mm or less, and more preferably 1.0 mm or more and 2.0 mm or less.

From the same viewpoint, it is preferable that the non-bonding overlapping portion 6 continuously extend in the longitudinal direction X over the entire length of the absorbent body 11, and it is more preferable that the non-adhesive overlapping portion 6 is equal to the entire product length.

Each member of the lower core wrap sheet 14b, the leak-proof sheet 15a, and the exterior nonwoven fabric 15b efficiently extends in the width direction Y to further suppress the swelling inhibition of the absorbent body 11 , and the non-adhesive portion 5 and the third adhesive. From the viewpoint of facilitating the overlap with the agent non-arrangement portion 45, it is preferable that the second adhesive arrangement portion 30 has a longer arrangement pitch in the width direction Y than the third adhesive arrangement portion 40. The length of the arrangement pitch Pc of the third adhesive placement portion 40 is, as shown in FIG. 5C, the length Wc of the third adhesive placement portion 40 in the width direction Y and the third adhesive non-placement portion 45. Is the total length of the length Dc.

The arrangement pitch Pc of the third adhesive placement portion 40 (see FIG. 5C) is preferably 5% or more, and more preferably, the arrangement pitch Pb of the second adhesive 3 (see FIG. 5B). Is 10% or more, preferably 60% or less, more preferably 30% or less, and preferably 5% or more and 60% or less, more preferably 10% or more and 30% or less.
The difference between the arrangement pitch Pb of the second adhesive 3 [see FIG. 5(b)] and the arrangement pitch Pc of the third adhesive placement portion 40 [see FIG. 5(c)] is preferably 1 mm or more, more preferably Is 10 mm or more, preferably 50 mm or less, more preferably 40 mm or less, and preferably 1 mm or more and 50 mm or less, more preferably 10 mm or more and 40 mm or less.

From the same viewpoint, the second adhesive placement portion 30 preferably has a shorter length in the width direction Y than the third adhesive placement portion 40.
The length Wc of the third adhesive placement portion 40 in the width direction Y (see FIG. 5C) is different from the length Wb of the second adhesive 3 in the width direction Y (see FIG. 5B). It is preferably 150% or more, more preferably 200% or more, preferably 500% or less, more preferably 400% or less, and preferably 150% or more and 500% or less, more preferably 200% or more and 400% or less. Is.
A length Wb of the second adhesive placement portion 30 in the width direction Y (see FIG. 5B) and a length Wc of the third adhesive placement portion 40 in the width direction Y (see FIG. 5(c)). The difference is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 4.0 mm or less, more preferably 3.0 mm or less, and preferably 0.5 mm or more and 4.0 mm or less, More preferably, it is 1.0 mm or more and 3.0 mm or less.

From the viewpoint of achieving both flexibility of the exterior nonwoven fabric 15b and suppression of swelling inhibition of the absorber 11, the third adhesive 4 is preferably arranged in the following dimensions.
The total area of the third adhesive placement portion 40 is preferably 25% or more, more preferably 30% or more, and preferably 50% or less, more preferably 40, with respect to the area of the third stripe arrangement region 41. % Or less, preferably 25% or more and 50% or less, and more preferably 30% or more and 40% or less.

The third stripe arrangement region 41 preferably extends over the entire area of the leak preventive sheet 15a in the width direction Y. The length W3 (see FIG. 4) of the third stripe arrangement region 41 in the width direction Y is preferably longer than the maximum length of the absorber 11 in the width direction Y, and the length W15a of the leak preventive sheet 15a in the width direction Y. Is more preferably the same as Further, the third stripe arrangement region 41 in the longitudinal direction X preferably extends over the entire area of the leak preventive sheet 15 a in the longitudinal direction X. The length L3 (see FIG. 4) of the third stripe arrangement region 41 in the longitudinal direction X is preferably longer than the entire length of the absorber 11 in the longitudinal direction X, and is the same as the length L15a of the leak preventive sheet 15a. Is more preferable. Further, the length L3 (see FIG. 4) of the third stripe arrangement region 41 in the longitudinal direction X is preferably longer than the total length of the absorber 11 in the longitudinal direction X, and is the same as the length of the leak preventive sheet 15a in the longitudinal direction X. More preferably the same.

The arrangement pitch Pc of the third adhesive 4 in the width direction Y (see FIG. 5C) is preferably 1.5 mm or more, more preferably 2.0 mm or more, and preferably 8.0 mm or less. Is 6.0 mm or less, preferably 1.5 mm or more and 8.0 mm or less, more preferably 2.0 mm or more and 6.0 mm or less.
The length Wc of the third adhesive placement portion 40 in the width direction Y (see FIG. 5C) is preferably 15% or more, more preferably 20% with respect to the placement pitch Pc of the third adhesive placement portion 40. % Or more, preferably 70% or less, more preferably 60% or less, and preferably 15% or more and 70% or less, more preferably 20% or more and 60% or less.

The length Wc of the third adhesive placement portion 40 in the width direction Y (see FIG. 5C) is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 4.0 mm or less, It is more preferably 3.0 mm or less, preferably 0.5 mm or more and 4.0 mm or less, and more preferably 1.5 mm or more and 3.0 mm or less.

From the viewpoint of improving the strength of the diaper 1 (absorbent article) in the width direction Y, as shown in FIG. 5D, a spiral adhesive is provided between the leakproof sheet and the exterior nonwoven fabric. It is preferable that they are joined together via. Further, it is preferable that a plurality of spiral continuous lines 90 forming the third adhesive placement portion 40s are intermittently arranged in the width direction Y and extend in the longitudinal direction X (see FIG. 5D). The third adhesive non-disposing portion 45s disposed between the third adhesive disposing portions 40s made of the third adhesive 4 arranged in a spiral shape overlaps the non-adhesive portion 5 described above, so that the absorber 11 Inhibition of swelling can be further suppressed.

Each continuous line 90 of the third adhesive placement portion 40 has a plurality of folded-back portions 91 (portions circled in FIG. 5D) on both sides in the width direction Y. In each continuous line 90, the positions in the width direction Y of the plurality of folded-back portions 91 are aligned on both sides in the width direction Y, and between the folded-back portion 91 on one side and the folded-back portion 91 on the other side in the width direction Y. Is uniform in length. In the third adhesive 4, the widthwise positions of the plurality of folded-back portions 91 are not uniform on both sides in the widthwise direction Y, that is, the length between the folded-back portion 91 on one side and the folded-back portion 91 on the other side in the widthwise direction is large. They may be arranged non-uniformly. In addition to the pattern shown in FIG. 5D, the above-mentioned "spiral shape" also includes a continuous omega pattern in which a plurality of omega characters are continuous at both left and right ends. Hereinafter, a region including the third adhesive placement portion 40s and the third adhesive non-placement portion 45s, which is a region where the third adhesive 4 is spirally arranged, is also referred to as a spiral placement region 41s.

When the third adhesive 4 is spirally arranged, the third spiral arrangement region 41s is preferably longer than the maximum length of the absorbent body 11 in the width direction Y, like the length W3 of the third stripe arrangement region 41. More preferably, it is the same as the length W15a of the leak preventive sheet 15a in the width direction Y. Similarly, the length Ls of the spirally arranged region 41s in the longitudinal direction X (see FIG. 4) is also preferably longer than the total length of the absorber 11 in the longitudinal direction X, and the length of the leak preventive sheet 15a in the longitudinal direction X. More preferably, it is the same as L15a.

The arrangement pitch Pcs (see FIG. 5D) of the third adhesive placement portion 40 in the width direction Y is preferably 4 mm or more, more preferably 8 mm or more, and preferably 40 mm or less, more preferably 30 mm or less. It is preferably 4 mm or more and 40 mm or less, more preferably 8 mm or more and 30 mm or less. The length of the arrangement pitch Pcs of the third adhesive 4 is, as shown in FIG. 5D, the length Wcs of the third adhesive placement portion 40s and the length of the third adhesive non-placement portion 45s in the width direction Y. It is the total length of the length Dcs. The length Wcs of the third adhesive placement portion 40s in the width direction Y is the maximum length between the one-side folded portion 91 and the other-side folded portion 91 in the width direction Y, and the width Wcs in the width direction Y. The length Dcs of the third adhesive non-arrangement portion 45s is the maximum length of the interval between the folded-back portions 91 facing each other in the third adhesive arrangement portion 40s adjacent in the width direction Y.

The length Wcs (see FIG. 5D) of the third adhesive placement portion 40s in the width direction Y is preferably 20% or more, more preferably 30%, with respect to the placement pitch Pcs of the third adhesive placement portion 40. % Or more, preferably 70% or less, more preferably 80% or less, and preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.
The length Wcs [see FIG. 5(d)] of the third adhesive placement portion 40s in the width direction Y is preferably 3 mm or more, more preferably 4 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. It is preferably 3 mm or more and 20 mm or less, more preferably 4 mm or more and 15 mm or less.

Even when the third adhesive 4 is arranged in a spiral shape, the non-adhesive overlapping portion 6 which is a portion where the third adhesive non-disposing portion 45 and the non-adhesive portion 5 overlap in the plan view of the absorbent article has a width. The length in the direction Y is preferably within the range described above. Further, it is preferable that the non-bonding overlapping portion 6 continuously extends in the longitudinal direction X within the range described above.

Each of the first adhesive 2, the second adhesive 3, and the third adhesive 4 in the present embodiment is a hot-melt type adhesive, and is applied using a coater. As the adhesive, various known adhesives that have been conventionally used for disposable diapers and the like can be used.
As a method of applying the adhesive in a stripe shape, in addition to the coater method, any known method such as a gravure method, a letterpress method, a bead method, and a spray method can be selected.

The application amount of the first adhesive 2, the second adhesive 3, and the third adhesive 4 is preferably 0.1 g/m ² or more, more preferably 0.3 g/m ² from the viewpoint of ensuring sufficient bonding strength. ² or more, preferably 5.0 g/m ² or less, more preferably 3.0 g/m ² or less, and preferably 0.1 g/m ² or more and 5.0 g/m ² or less, more preferably It is 0.3 g/m ² or more and 3.0 g/m ² or less.
The application amount of each of the above adhesives 2, 3, and 4 is determined by obtaining the area of the entire placement region including the non-adhesive placement portion located between the adhesive placement portions of each adhesive, and Determine the total weight of the adhesive.

Explaining the forming material of each part in the diaper 1, the forming material of the surface sheet 12, the leak-proof sheet 15a, the exterior nonwoven fabric 15b, the absorber 11, and the three-dimensional gather forming sheet 16 is used in the conventional disposable diapers. Various known materials that are known can be used without particular limitation. For example, as the topsheet 12, various liquid-permeable sheet materials such as non-woven fabric and perforated film can be used. As the leak-proof sheet 15a, it is possible to use a resin film having no moisture permeability, a resin film having fine pores and moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, or a laminate of these and other sheets. it can. As the exterior non-woven fabric 15b, non-woven fabrics manufactured by various methods, for example, air-through non-woven fabric, spunbonded non-woven fabric, spunlace non-woven fabric, etc. can be used, and may have a multi-layer structure.

As a material for forming the tape base material 75, a synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate, or a sheet or a nonwoven fabric made of a composite material of two or more of these synthetic resins can be used.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
The description omitted part in one embodiment described above and the requirement that only one embodiment has can be appropriately applied to each of the other embodiments, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be replaced with

The following absorbent articles are disclosed regarding the above-mentioned embodiment.
<1>
A vertically long absorbent article comprising a top sheet, an absorber and a back sheet, having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core,
The lower core wrap sheet located on the non-skin facing surface side of the absorbent core is bonded to the non-skin facing surface of the absorbent core via a first adhesive arranged in a stripe shape, and the stripe Is bonded to the skin-facing surface of the back sheet through a second adhesive that is arranged in a line,
The lower core wrap sheet has a plurality of non-adhesive portions in the width direction that are not adhered to either the absorbent core or the back sheet, and each of the plurality of non-adhesive portions extends in the longitudinal direction. , Absorbent articles.

<2>
The non-adhesive portion is formed by completely overlapping the first adhesive non-disposing portion where the first adhesive is not arranged and the second adhesive non-disposing portion where the second adhesive is not arranged, The absorbent article according to <1>, which is formed.
<3>
In the non-adhesive portion, the first adhesive non-disposing portion where the first adhesive is not disposed and the second adhesive non-disposing portion where the second adhesive is not disposed partially overlap each other. The absorbent article according to <1> or <2>, which is formed.
<4>
The non-adhesive portion is formed on both sides of a first adhesive placement portion where the first adhesive is placed or a second adhesive placement portion where the second adhesive is placed in the width direction, The absorbent article according to any one of <1> to <3>.
<5>
The first adhesive placement portion in which the first adhesive is placed has a shorter placement pitch in the width direction than the second adhesive placement portion in which the second adhesive is placed, <1> ~ The absorbent article according to any one of <4>.
<6>
The arrangement pitch Pa of the first adhesive placement portion is preferably 10% or more, more preferably 15% or more, and preferably 85% or less with respect to the placement pitch Pb of the second adhesive placement portion. The absorbent article according to <5>, which is more preferably 50% or less, preferably 10% or more and 85% or less, more preferably 15% or more and 50% or less.
<7>
The difference between the arrangement pitch Pa of the first adhesive placement portion and the arrangement pitch Pb of the second adhesive placement portion is preferably 1 mm or more, more preferably 10 mm or more, and preferably 45 mm or less, more preferably Is 35 mm or less, preferably 1 mm or more and 45 mm or less, more preferably 10 mm or more and 35 mm or less, <5> or <6>.
<8>
The first adhesive placement portion in which the first adhesive is placed has a length in the width direction that is longer than the second adhesive placement portion in which the second adhesive is placed, <1> ~ The absorbent article according to any one of <7>.
<9>
The length Wa of the first adhesive placement portion in the width direction is preferably 120% or more, more preferably 150% or more with respect to the length Wb of the second adhesive placement portion in the width direction. The absorbent article according to <8>, which is preferably 400% or less, more preferably 300% or less, and preferably 120% or more and 400% or less, more preferably 150% or more and 300% or less.
<10>
The difference between the length Wa of the first adhesive placement portion in the width direction and the length Wb of the second adhesive placement portion in the width direction is preferably 0.5 mm or more, more preferably 1.0 mm. Or more, preferably 3.0 mm or less, more preferably 2.5 mm or less, preferably 0.5 mm or more and 3.0 mm or less, more preferably 1.0 mm or more and 2.5 mm or less, 8> or the absorbent article according to <9>.

<11>
A length in the width direction of a first stripe arrangement region including a first adhesive placement portion where the first adhesive is placed and a first adhesive non-placement portion where the first adhesive is not placed The absorbent article according to any one of <1> to <10>, wherein W1 is the same as the maximum length W13 of the absorbent core in the width direction.
<12>
A length of the first stripe arrangement region including a first adhesive placement portion where the first adhesive is placed and a first adhesive non-placement portion where the first adhesive is not placed is the length in the longitudinal direction. The absorbent article according to any one of <1> to <11>, wherein L1 is the same as the total length L13 of the absorbent core in the longitudinal direction.
<13>
The length Wa of the first adhesive placement portion in the width direction is preferably 20% or more, more preferably 30% or more, with respect to the placement pitch Pa of the first adhesive placement portion, and is also preferably. 80% or less, more preferably 70% or less, preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less, according to any one of <5> to <12> above. Absorbent article.
<14>
The length Wa of the first adhesive placement portion in the width direction is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 5.0 mm or less, more preferably 4.0 mm or less. The absorbent article according to any one of <5> to <13>, which is 1.0 mm or more and 5.0 mm or less, and more preferably 1.5 mm or more and 4.0 mm or less.
<15>
The length Da of the first adhesive non-arranged portion in which the first adhesive is not arranged in the width direction is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 5.0 mm. Or less, more preferably 4.0 mm or less, preferably 0.5 mm or more and 5.0 mm or less, more preferably 1.0 mm or more and 4.0 mm or less, any one of the above <5> to <14> The absorbent article according to.
<16>
The second stripe arrangement region including the second adhesive placement portion where the second adhesive is placed and the second adhesive non-placement portion where the second adhesive is not placed is the lower portion in the width direction. It is preferable to extend over the entire area of the side core wrap sheet, and it is more preferable that the side core wrap sheet extends outward in the width direction with respect to the lower core wrap sheet. The absorbent article described.
<17>
The absorbent article according to <16>, wherein a length W2 of the second stripe arrangement region in the width direction is longer than a maximum length W14b of the lower core wrap sheet in the width direction.
<18>
The second stripe arrangement region including the second adhesive placement portion where the second adhesive is placed and the second adhesive non-placement portion where the second adhesive is not placed is the lower portion in the longitudinal direction. It is preferable that it extends over the entire length of the side core wrap sheet, and it is more preferable that the side core wrap sheet extends outside of the lower core wrap sheet in the longitudinal direction. In any one of the above items <1> to <17> The absorbent article described.
<19>
The length L2 of the second stripe arrangement region in the longitudinal direction is preferably longer than the total length L14b of the lower core wrap sheet in the longitudinal direction, more preferably equal to the total length of the back sheet in the longitudinal direction, The absorbent article according to <18>, further preferably equal to the total length of the absorbent article in the longitudinal direction.
<20>
The length Wb of the second adhesive placement portion in the width direction is preferably 2.5% or more, more preferably 3% or more with respect to the placement pitch Pb of the second adhesive placement portion, and Any of the above <5> to <19>, preferably 15% or less, more preferably 10% or less, preferably 2.5% or more and 15% or less, more preferably 3% or more and 10% or less. The absorbent article according to 1.

<21>
The length Wb of the second adhesive placement portion in the width direction is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 3.0 mm or less, more preferably 2.5 mm or less. The absorbent article according to any one of the above items <5> to <20>, which is 0.5 mm or more and 3.0 mm or less, and more preferably 1.0 mm or more and 2.5 mm or less.
<22>
The length Db of the second adhesive non-arranged portion in which the second adhesive is not arranged in the width direction is preferably 3 mm or more, more preferably 5 mm or more, and preferably 50 mm or less, more preferably 40 mm. The absorbent article according to any one of <5> to <21>, which is less than or equal to 3 mm and less than or equal to 50 mm, more preferably less than or equal to 5 mm and less than or equal to 40 mm.
<23>
The length W5 of the non-adhesive portion in the width direction is preferably 20% or more with respect to the length Da of the first adhesive non-disposing portion 25 in which the first adhesive is not disposed in the width direction, It is more preferably 40% or more, preferably 100% or less, more preferably 80% or less, preferably 20% or more and 100% or less, more preferably 40% or more and 80% or less, <5. >-<23> any one of the absorbent articles of any one of.
<24>
The sum of the lengths W5 of the non-adhesive portions in the width direction is preferably the sum of the length Db of the second adhesive non-disposing portions 35 in which the second adhesive is not disposed in the width direction. 15% or more, more preferably 25% or more, preferably 75% or less, more preferably 65% or less, and preferably 15% or more and 75% or less, more preferably 25% or more and 65% or less. , The absorbent article according to any one of <1> to <23>.
<25>
The length W5 of the non-adhesive portion in the width direction is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 4.0 mm or less, more preferably 2.5 mm or less, and The absorbent article according to any one of <1> to <24>, which is preferably 0.5 mm or more and 4.0 mm or less, more preferably 1.0 mm or more and 2.5 mm or less.
<26>
The non-adhesive portion 5 preferably extends continuously over the entire length of the absorbent body in the longitudinal direction, and more preferably equal to the entire length of the absorbent article, according to <1> to <25>. The absorbent article according to any one of claims 1.
<27>
In the second adhesive, the second adhesive disposed in the central region in the width direction and the second adhesive disposed on both sides of the central region have different adhesive strengths when wet. The absorbent article according to any one of <1> to <26>.
<28>
The back sheet comprises a leak-proof sheet and an exterior nonwoven fabric covering the non-skin-facing surface of the leak-proof sheet,
The leak-proof sheet and the exterior nonwoven fabric are joined together via a third adhesive arranged in a stripe pattern,
A third adhesive placement portion in which the third adhesive is placed and a third adhesive non-placement portion in which the third adhesive is not placed between the leak-proof sheet and the exterior nonwoven fabric, Formed alternately extending in the width direction and extending in the longitudinal direction,
Absorption according to any one of <1> to <27>, wherein the third adhesive non-arrangement portion and the non-adhesion portion of the lower core wrap sheet overlap in a plan view of an absorbent article. Sex goods.
<29>
The absorbent article according to <28>, wherein the adhesive placement portion on which the second adhesive is placed has a longer placement pitch in the width direction than the third adhesive placement portion.
<30>
The absorbent article according to <28> or <29>, in which the adhesive placement section in which the second adhesive is placed has a shorter length in the width direction than the third adhesive placement section. ..

<31>
In the non-adhesion overlapping part in which none of the first adhesive, the second adhesive and the third adhesive is present, the length W6 of the non-adhesion overlapping part in the width direction is the non-adhesion in the width direction. With respect to the length W5 of the part, preferably 20% or more, more preferably 40% or more, preferably 100% or less, more preferably 80% or less, and preferably 20% or more 100% or less, The absorbent article according to any one of <28> to <30>, which is more preferably 40% or more and 80% or less.
<32>
In the non-adhesion overlapping part in which none of the first adhesive, the second adhesive, and the third adhesive is present, the length W6 of the non-adhesion overlapping part in the width direction is the third in the width direction. It is preferably 20% or more, more preferably 30% or more, preferably 100% or less, more preferably 70% or less, and preferably 20% or more with respect to the length Dc of the adhesive non-arranged portion. The absorbent article according to any one of <28> to <31>, which is 100% or less, more preferably 30% or more and 70% or less.
<33>
In the non-adhesion overlapping part in which none of the first adhesive, the second adhesive and the third adhesive is present, the length W6 of the non-adhesion overlapping part in the width direction is preferably 0.5 mm or more, It is more preferably 1.0 mm or more, preferably 3.5 mm or less, more preferably 2.0 mm or less, and preferably 0.5 mm or more and 3.5 mm or less, more preferably 1.0 mm or more and 2.0 mm. The absorbent article according to any one of <28> to <32> below.
<34>
The non-adhesion overlapping part where none of the first adhesive, the second adhesive, and the third adhesive is present may extend continuously over the entire length of the absorber in the longitudinal direction. The absorbent article according to any one of <28> to <33>, which is more preferably equal to the total length of the absorbent article.
<35>
The arrangement pitch Pc of the third adhesive placement portion is preferably 5% or more, more preferably 10% or more with respect to the placement pitch Pb of the second adhesive placement portion in which the second adhesive is placed. Any of <28> to <34>, which is preferably 60% or less, more preferably 30% or less, and preferably 5% or more and 60% or less, more preferably 10% or more and 30% or less. The absorbent article according to 1.
<36>
The difference between the arrangement pitch Pb of the second adhesive placement portion in which the second adhesive is placed and the placement pitch Pc of the third adhesive placement portion 40 is preferably 1 mm or more, more preferably 10 mm or more, The absorbent article according to any one of <28> to <35>, which is preferably 50 mm or less, more preferably 40 mm or less, and preferably 1 mm or more and 50 mm or less, more preferably 10 mm or more and 40 mm or less. ..
<37>
The length Wc of the third adhesive placement portion in the width direction is preferably 150% or more, more preferably the length Wc of the second adhesive placement portion in which the second adhesive is placed in the width direction. Is 200% or more, preferably 500% or less, more preferably 400% or less, preferably 150% or more and 500% or less, more preferably 200% or more and 400% or less, <28> to The absorbent article according to any one of <36>.
<38>
The difference between the length Wb of the second adhesive placement portion in which the second adhesive is placed in the width direction and the length Wc of the third adhesive placement portion in the width direction is preferably 0.5 mm or more. , More preferably 1.0 mm or more, preferably 4.0 mm or less, more preferably 3.0 mm or less, and preferably 0.5 mm or more and 4.0 mm or less, more preferably 1.0 mm or more 3. The absorbent article according to any one of <28> to <37>, which is 0 mm or less.
<39>
The total area of the third adhesive placement portion is preferably 25% or more, more preferably the area of the third stripe placement area including the third adhesive placement portion and the third adhesive non-placement portion. 30% or more, preferably 50% or less, more preferably 40% or less, preferably 25% or more and 50% or less, more preferably 30% or more and 40% or less, <28> ~ The absorbent article according to any one of <38>.
<40>
In the third stripe arrangement region including the third adhesive placement portion and the third adhesive non-placement portion, the length W3 of the third stripe placement region in the width direction is the width of the absorber in the width direction. The absorbent article according to any one of <28> to <39>, which is preferably longer than the width and more preferably the same as the length W15a of the leak-proof sheet.

<41>
In the third stripe arrangement region including the third adhesive placement portion and the third adhesive non-placement portion, the length L3 of the third stripe placement region in the longitudinal direction is the total length of the absorber in the longitudinal direction. The absorbent article according to any one of the above items <28> to <40>, which is preferably longer than that and more preferably the same as the length L15a of the leak preventive sheet.
<42>
The arrangement pitch Pc of the third adhesive placement portions in the width direction is preferably 1.5 mm or more, more preferably 2.0 mm or more, and preferably 8.0 mm or less, more preferably 6.0 mm or less. And the absorbent article according to any one of <28> to <41>, which is preferably 1.5 mm or more and 8.0 mm or less, more preferably 2.0 mm or more and 6.0 mm or less.
<43>
The length Wc of the third adhesive placement portion in the width direction is preferably 15% or more, more preferably 20% or more with respect to the placement pitch Pc of the third adhesive placement portion, and is also preferably. 70% or less, more preferably 60% or less, preferably 15% or more and 70% or less, more preferably 20% or more and 60% or less, according to any one of the above <28> to <42>. Absorbent article.
<44>
The length Wc of the third adhesive placement portion in the width direction is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 4.0 mm or less, more preferably 3.0 mm or less. The absorbent article according to any one of the above items <28> to <43>, which is 0.5 mm or more and 4.0 mm or less, and more preferably 1.5 mm or more and 3.0 mm or less.
<45>
The back sheet comprises a leak-proof sheet and an exterior nonwoven fabric covering the non-skin-facing surface of the leak-proof sheet,
The leak-proof sheet and the exterior nonwoven fabric are joined together via a third adhesive arranged in a spiral shape,
A third adhesive placement portion in which the third adhesive is placed and a third adhesive non-placement portion in which the third adhesive is not placed are provided between the leak-proof sheet and the exterior nonwoven fabric. It is formed alternately in the width direction and extending in the longitudinal direction,
The third adhesive non-disposing portion and the non-adhesive portion of the lower core wrap sheet are overlapped with each other in a plan view of the absorbent article, according to any one of <1> to <27>. Absorbent article.
<46>
In the third spiral placement area including the third adhesive placement section and the third adhesive non- placement section, the length of the third spiral placement area in the width direction is the maximum of the absorber in the width direction. longer it is favored over the length, and more preferably the same as the length of the barrier sheet 15a which definitive in the width direction, the absorbent article according to <45>.
<47>
In the third spiral arrangement area including the third adhesive arrangement portion and the third adhesive non- arrangement portion, the length Ls of the third spiral arrangement area in the longitudinal direction is the total length of the absorber 11 in the longitudinal direction. The absorbent article according to <45> or <46>, which is preferably longer than the above, and more preferably the same as the length L15a of the leak preventive sheet 15a in the longitudinal direction.
<48>
The arrangement pitch Pcs of the third adhesive placement portion in the width direction is preferably 4 mm or more, more preferably 8 mm or more, and preferably 40 mm or less, more preferably 30 mm or less, and preferably 4 mm or more and 40 mm. Hereinafter, the absorbent article according to any one of the above items <45> to <47>, which is more preferably 8 mm or more and 30 mm or less.
<49>
The length Wcs of the third adhesive placement portion in the width direction is preferably 20% or more, more preferably 30% or more with respect to the placement pitch Pcs of the third adhesive placement portion 40, and is also preferred. Is 70% or less, more preferably 80% or less, preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less, <45> to <48>. Absorbent article.
<50>
The length Wcs of the third adhesive placement portion in the width direction is preferably 3 mm or more, more preferably 4 mm or more, preferably 20 mm or less, more preferably 15 mm or less, and preferably 3 mm or more and 20 mm. Hereinafter, the absorbent article according to any one of the above items <45> to <49>, which is more preferably 4 mm or more and 15 mm or less.

<51>
The coating amount of one or both of the first adhesive and the second adhesive is preferably 0.1 g/m ² or more, more preferably 0.3 g/m ² or more, and preferably 5. 0 g/m ² or less, more preferably 3.0 g/m ² or less, and preferably 0.1 g/m ² or more and 5.0 g/m ² or less, more preferably 0.3 g/m ² or more and 3.0 g. /M ² or less, the absorbent article according to any one of <1> to <50>.
<52>
The coating amount of the third adhesive is preferably 0.1 g/m ² or more, more preferably 0.3 g/m ² or more, and preferably 5.0 g/m ² or less, more preferably 3.0 g. /M ² or less, preferably 0.1 g/m ² or more and 5.0 g/m ² or less, more preferably 0.3 g/m ² or more and 3.0 g/m ² or less, <28> to The absorbent article according to any one of <51>.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 12 Surface sheet 11 Absorbent body 13 Absorbent core 14 Core wrap sheet 14a Upper core wrap sheet 14b Lower core wrap sheet 15 Back sheet 15a Leakage prevention sheet 15b Exterior nonwoven fabric 16 Three-dimensional gather forming sheet 16a Elastic member 17 Leg part Elastic member 2 First adhesive 20 First adhesive placement part 25 First adhesive non-placement part 3 Second adhesive 30 Second adhesive placement part 35 Second adhesive non-placement part 4 Third adhesive 40 Third Adhesive placement part 45 Third adhesive non-placement part 5 Non-adhesion part 6 Non-adhesion overlapping part 7 Fastening tape 8 Landing zone A Ventral part B Dorsal part C Crotch part X Longitudinal direction Y Width direction CL Central line

Claims (7)

A vertically long absorbent article comprising a top sheet, an absorber and a back sheet, having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core,
The lower core wrap sheet located on the non-skin facing surface side of the absorbent core is bonded to the non-skin facing surface of the absorbent core via a first adhesive arranged in a stripe shape, and the stripe Is bonded to the skin-facing surface of the back sheet through a second adhesive that is arranged in a line,
The lower core wrap sheet has a plurality of non-adhesive portion that is not also bonded to one of said absorbent core and said backsheet in said width direction, each of the plurality of the non-adhesive portion extending in the longitudinal direction ,
The back sheet comprises a leak-proof sheet and an exterior nonwoven fabric covering the non-skin-facing surface of the leak-proof sheet,
The leak-proof sheet and the exterior nonwoven fabric are joined together via a third adhesive arranged in a stripe pattern,
A third adhesive placement portion in which the third adhesive is placed and a third adhesive non-placement portion in which the third adhesive is not placed between the leak-proof sheet and the exterior nonwoven fabric, Formed alternately extending in the width direction and extending in the longitudinal direction,
The absorbent article, wherein the third adhesive non-arrangement portion and the non-adhesive portion of the lower core wrap sheet overlap each other in a plan view of the absorbent article. The absorbent according to claim 1, wherein the adhesive placement portion in which the first adhesive is arranged has a shorter placement pitch in the width direction than the adhesive placement portion in which the second adhesive is placed. Goods. The adhesive placement portion in which the first adhesive is arranged has a length in the width direction that is longer than the adhesive placement portion in which the second adhesive is arranged. Absorbent article. The second adhesive has a different adhesive strength when wet between the second adhesive disposed in the central region in the width direction and the second adhesive disposed on both sides of the central region. The absorbent article according to any one of 1 to 3. The adhesive placement section in which the second adhesive is placed has a longer placement pitch in the width direction than the third adhesive placement section, The absorption according to any one of claims 1 to 4. Sex goods. Absorption according to any one of claims 1 to 5 , wherein the adhesive placement portion on which the second adhesive is placed has a shorter length in the width direction than the third adhesive placement portion. Sex goods. A vertically long absorbent article comprising a top sheet, an absorber and a back sheet, having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core,
The lower core wrap sheet located on the non-skin facing surface side of the absorbent core is bonded to the non-skin facing surface of the absorbent core via a first adhesive arranged in a stripe shape, and the stripe Is bonded to the skin-facing surface of the back sheet through a second adhesive that is arranged in a line,
The lower core wrap sheet has a plurality of non-adhesive portions that are not adhered to either the absorbent core or the back sheet in the width direction, and each of the plurality of non-adhesive portions extends in the longitudinal direction. ,
The back sheet comprises a leak-proof sheet and an exterior nonwoven fabric covering the non-skin-facing surface of the leak-proof sheet,
The leak-proof sheet and the exterior nonwoven fabric are joined together via a third adhesive arranged in a spiral shape,
A third adhesive placement portion in which the third adhesive is placed and a third adhesive non-placement portion in which the third adhesive is not placed are provided between the leak-proof sheet and the exterior nonwoven fabric. It is formed alternately in the width direction and extending in the longitudinal direction,
Wherein a third said non-adhesive portion of the the adhesive non-disposed portion lower core wrap sheets are overlapped in a plan view of the absorbent article, absorption Osamusei article.