Pet diaper

Abstract

To provide a pet diaper capable of preventing skin rash on a pet's hind legs.SOLUTION: A pet diaper 1 includes a body part 2. The body part 2 includes a front surface sheet 3, a rear surface sheet 4, and an absorbent core 11. The body part 2 is provided with a tail insertion part 6 through which the tail of the pet is inserted. The rear surface sheet 4 includes: an exterior sheet 41 that constitutes the outermost surface of the body part 2; and a leakage prevention sheet 42 that is disposed between the exterior sheet 41 and the absorbent core 11 and is joined to the exterior sheet 41. A non-joint region N in which the exterior sheet 41 and the leakage prevention sheet 42 are not joined to each other is provided in a region of the body part 2 on the abdominal side with respect to the tail insertion part 6. In a region of at least a partial area of the non-joint region N that has a predetermined length in a longitudinal direction Y, the width w3 of the non-joint region N is greater than a distance d from the outer end part Na of the non-joint region N to the outer edge part 2c of the body part 2.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to pet diapers.

Background Art

[0002] Conventionally, pet diapers worn by pets such as dogs and cats are known. For example, Patent Document 1 discloses a pet diaper provided with a tail insertion part (cut) for inserting the tail of a pet through a part dorsal to the absorbent core.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when a pet diaper as described above is worn on a pet for a long time, friction occurs between the hind legs of the pet and the outer sheet of the pet diaper due to the pet's living movements (for example, walking movements, etc.), which may cause chafing on the hind legs of the pet.

[0005] Therefore, an aspect of the present disclosure aims to provide a pet diaper capable of suppressing the occurrence of chafing on the hind legs of a pet.

Means for Solving the Problems

[0006] The diaper for pets according to one aspect of the present disclosure is a diaper for pets to be worn on a pet, and includes a main body portion having a longitudinal direction connecting the ventral side to the dorsal side of the pet and a width direction orthogonal to the longitudinal direction. The main body portion includes a surface sheet disposed at a position facing the pet's skin in a worn state where the pet diaper is worn on the pet, a back sheet disposed on the side opposite to the pet's skin side in the worn state, and an absorbent core disposed between the surface sheet and the back sheet. A tail insertion portion for inserting the pet's tail is provided in the main body portion. The back sheet includes an outer sheet constituting the outermost surface of the main body portion and an inner sheet disposed between the outer sheet and the absorbent core and joined to the outer sheet. In a region on the ventral side of the main body portion rather than the tail insertion portion, a non-joined region where the outer sheet and the inner sheet are not joined to each other is provided. In at least a partial range of the non-joined region having a predetermined length in the longitudinal direction, the width of the non-joined region is made longer than the distance from the outer end of the non-joined region in the width direction to the outer edge of the main body portion.

Advantages of the Invention

[0007] According to the present disclosure, it is possible to provide a pet diaper that can suppress the occurrence of chafing of the pet's hind legs.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0009] From the descriptions in this specification and the attached drawings, at least the following aspects 1 to 14 become clear.

[0010] (Aspect 1) A pet diaper to be worn on a pet, comprising a main body portion having a longitudinal direction connecting the ventral side to the dorsal side of the pet and a width direction orthogonal to the longitudinal direction, The main body portion a surface sheet disposed at a position facing the pet's skin in a worn state where the pet diaper is worn on the pet, a back sheet disposed on the side opposite to the pet's skin side in the worn state, and an absorbent core disposed between the surface sheet and the back sheet, a tail insertion portion for inserting the pet's tail is provided in the main body portion, The back sheet an outer sheet constituting the outermost surface of the main body portion, and an inner sheet disposed between the outer sheet and the absorbent core and joined to the outer sheet, a non-joined region where the outer sheet and the inner sheet are not joined to each other is provided in a region on the ventral side of the main body portion with respect to the tail insertion portion, In at least a partial range of the non-joined region having a predetermined length in the longitudinal direction among the non-joined regions, the width of the non-joined region is made longer than the distance from the outer end portion of the non-joined region in the width direction to the outer edge portion of the main body portion. A pet diaper.

[0011] When a pet performs daily activities such as walking while wearing a pet diaper, mainly, the ventral part of the outer sheet, which is located ventral to the tail insertion part, rubs against the hind legs of the pet. In the above pet diaper, a non-joined area is provided in the area where the hind legs of the pet and the outer sheet rub against each other in this way. In the non-joined area, since the outer sheet is not joined to the inner sheet, the outer sheet can move freely away from the inner sheet. Further, in a region having a predetermined length in the longitudinal direction (hereinafter referred to as the "effective region"), the width (length in the width direction) of the non-joined region is made longer than the distance from the outer end of the non-joined region to the outer edge of the main body. That is, at least in the above effective region, a non-joined region that is wider than the region where the outer sheet and the inner sheet are joined is provided near the outer edge of the main body. As a result, in the above effective region, when the hind legs of the pet rub against the outer sheet, the outer sheet can preferably move away from the inner sheet and slide. As a result, the outer sheet moves following the hind legs of the pet, and the friction generated between the outer sheet and the hind legs of the pet can be reduced. Therefore, according to the above pet diaper, the occurrence of chafing of the hind legs of the pet can be suppressed.

[0012] (Aspect 2) The absorbent core a central part including a part having a minimum width, a pair of wide parts arranged on both sides of the central part in the longitudinal direction and having a maximum width, The outer end of the non-joined region in the width direction is arranged outside the end of the part having the minimum width of the central part in the width direction, the pet diaper of Aspect 1.

[0013] In the region outside the constricted region (the part having the minimum width) of the absorbent core in the width direction, the hind legs of the pet and the outer sheet are likely to rub against each other. Therefore, by providing the non-joined region so as to reach outside the constricted region of the absorbent core as described above, the friction generated between the hind legs of the pet and the outer sheet can be effectively reduced.

[0014] (Aspect 3) In the diaper for pets according to Aspect 2, the outer end of the non - joined region in the width direction is disposed outside the end of the wide portion in the width direction.

[0015] According to Aspect 3, by providing a non - joined region so as to reach outside the entire absorbent core in the width direction, the friction generated between the rear legs of the pet and the outer sheet can be more effectively reduced.

[0016] (Aspect 4) The main body portion has leg - side gathers configured to be capable of standing up by fixing both end portions in the longitudinal direction and causing the portion between the both end portions to contract in the longitudinal direction. In the diaper for pets according to any one of Aspects 1 to 3, the outer end of the non - joined region in the width direction is disposed outside the standing fulcrum of the leg - side gathers extending in the longitudinal direction.

[0017] In the region outside the standing fulcrum of the leg - side gathers, the rear legs of the pet and the outer sheet are likely to rub against each other. According to Aspect 4, by providing a non - joined region so as to reach outside the standing fulcrum, the friction generated between the rear legs of the pet and the outer sheet can be effectively reduced.

[0018] (Aspect 5) The absorbent core has a central portion including a portion having a minimum width, and a pair of wide portions disposed on both sides of the central portion in the longitudinal direction and having a maximum width. In the diaper for pets according to Aspect 4, at least one of the both end portions of the leg - side gathers is disposed at a position overlapping a portion protruding outside the central portion in the width direction of the wide portion.

[0019] According to Aspect 5, the contraction force of the leg side gathers can be effectively transmitted to the region outside the width direction of the central portion of the absorbent core. As a result, in the non-bonded region included in the region, the outer sheet can be suitably released with respect to the inner sheet, so that the friction generated between the rear leg portion of the pet and the outer sheet can be more effectively reduced.

[0020] (Aspect 6) The main body portion is arranged to extend in the longitudinal direction along the outer edge portion of the main body portion, and has an elastic member that contracts in the longitudinal direction. The outer end portion of the non-bonded region in the width direction is arranged outside the elastic member. The disposable diaper for pets according to claim 1.

[0021] According to Aspect 6, by contracting the inner sheet by the contraction of the elastic member, the outer sheet can be suitably released with respect to the inner sheet in the non-bonded region, so that the friction generated between the rear leg portion of the pet and the outer sheet can be more effectively reduced.

[0022] (Aspect 7) The region where the non-bonded region and the absorbent core overlap is continuously provided along the longitudinal direction from the inner end portion of the end portion of the non-bonded region on one side in the longitudinal direction and the end portion of the absorbent core to the inner end portion of the end portion of the non-bonded region on the other side in the longitudinal direction and the end portion of the absorbent core. The disposable diaper for pets according to any one of Aspects 1 to 6.

[0023] In the region where the non-bonded region and the absorbent core overlap, the outer sheet having relatively low rigidity is deformed and easily released from the inner sheet with respect to the absorbent core having relatively high rigidity. By continuously providing such a region (that is, a region where only the outer sheet easily moves following the movement of the rear leg portion of the pet due to the rigidity difference between the absorbent core and the outer sheet) along the longitudinal direction, the friction generated between the rear leg portion of the pet and the outer sheet can be more effectively reduced.

[0024] (Aspect 8) The non-bonding region is provided so as to straddle a center line extending in the longitudinal direction through a central portion of the main body portion in the width direction, for any one of Aspects 1 to 7 of the pet diaper.

[0025] According to Aspect 8, the effects described for Aspect 7 can be more preferably obtained.

[0026] (Aspect 9) The non-bonding region has a first region and a second region that are spaced apart from each other with a center line extending in the longitudinal direction through a central portion of the main body portion in the width direction interposed therebetween, and the inner sheet and the outer sheet are joined to each other in a region between the first region and the second region, for any one of Aspects 1 to 7 of the pet diaper.

[0027] By providing a bonding region where the inner sheet and the outer sheet are joined between the first region and the second region, the range in which the outer sheet moves away from the inner sheet due to the left and right hind legs of the pet shifting back and forth during the pet's walking can be divided by the above bonding region. As a result, it is possible to suppress the outer sheet from moving too much (being pulled too much) in a specific direction with respect to the inner sheet, and as a result, it is possible to suppress the occurrence of damage to the back sheet (for example, tearing of the outer sheet, etc.).

[0028] (Aspect 10) The absorbent core has a central portion including a portion having a minimum width, and a pair of wide portions arranged on both sides of the central portion in the longitudinal direction and having a maximum width, and the non-bonding region is provided at least in a range where the central portion is located in the longitudinal direction, for any one of Aspects 1 to 9 of the pet diaper.

[0029] In the main body portion, the region where the central portion of the absorbent core is disposed is likely to contract in the width direction when the pet diaper is worn on the pet and is pinched between the pet's thighs, and the rear legs of the pet and the outer sheet are likely to rub against each other. According to Aspect 10, by providing a non-bonding region at least in such a region, the friction generated between the rear legs of the pet and the outer sheet can be effectively reduced.

[0030] (Aspect 11) The end of the non-bonding region in the longitudinal direction is disposed outside the end of the absorbent core in the longitudinal direction, for the pet diaper of Aspect 10.

[0031] According to Aspect 11, the effects described for Aspect 10 can be obtained more reliably.

[0032] (Aspect 12) The main body portion has leg side gathers configured to be able to stand up by fixing both ends in the longitudinal direction and causing the portion between the both ends to contract in the longitudinal direction. The end of the non-bonding region in the longitudinal direction is disposed outside the both ends of the leg side gathers, for the pet diaper of any one of Aspects 1 to 11.

[0033] In the region between the longitudinal both ends of the leg side gathers, the outer sheet is likely to be deformed (easily separated from the inner sheet) due to the contraction of the leg side gathers. According to Aspect 12, by providing a non-bonding region in such a region, the friction generated between the rear legs of the pet and the outer sheet can be effectively reduced.

[0034] (Aspect 13) The non-bonding region is not provided in the region overlapping the tail insertion portion and the region dorsal to the tail insertion portion, for the pet diaper of any one of Aspects 1 to 12.

[0035] According to Aspect 13, for the dorsal region where the friction reduction effect between the hind legs of the pet and the outer sheet is small (where the hind legs of the pet and the outer sheet are not easily rubbed against each other), by joining the inner sheet and the outer sheet, peeling of the outer sheet can be appropriately prevented. Also, in the region overlapping the tail insertion portion, by joining the inner sheet and the outer sheet, peeling of the outer sheet starting from the edge of the tail insertion portion can be appropriately prevented.

[0036] (Aspect 14) The outer sheet of the disposable diaper for pets according to any one of Aspects 1 to 13 is formed of a non-woven fabric having a plurality of joints by heat fusion.

[0037] According to Aspect 14, by configuring the outer sheet with the non-woven fabric as described above, tearing of the outer sheet can be preferably suppressed. Also, in the non-joined region, when the outer sheet moves with respect to the inner sheet, friction occurs between the outer sheet and the inner sheet, and generation of fuzz on the outer sheet due to such friction can be suppressed.

[0038] [Embodiment] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

[0039] With reference to FIGS. 1 to 5, the configuration of a disposable diaper 1 for pets according to an embodiment will be described. FIG. 1 is a plan view of the disposable diaper 1 for pets seen from the skin side. FIG. 2 is a plan view of the disposable diaper 1 for pets seen from the non-skin side. FIGS. 1 and 2 show the disposable diaper 1 for pets in an extended state extended to a state where wrinkles are not formed. FIG. 3 is a cross-sectional view of the disposable diaper 1 for pets taken along line III-III in FIG. 1. The disposable diaper 1 for pets is a diaper worn on a pet. In this specification, "pet" widely includes vertebrates and invertebrates, and typically includes pet animals such as dogs, cats, rabbits, and hamsters. As an example, the disposable diaper 1 for pets is a diaper for dogs.

[0040] In the present embodiment, the "skin side" is the side facing the pet's skin in the state where the pet diaper 1 is worn on the pet. The "non-skin side" is the side directed to the side opposite to the pet's skin in the worn state. As shown in FIG. 1, the pet diaper 1 has a longitudinal direction Y connecting the ventral side to the dorsal side of the pet, a width direction X orthogonal to the longitudinal direction Y and arranged along the pet's body circumference direction, and a thickness direction Z orthogonal to the longitudinal direction Y and the width direction X. As shown in FIG. 3, the thickness direction Z is the lamination direction of each material (such as the surface sheet 3, the back sheet 4, the absorber 10, etc., described later) constituting the pet diaper 1. Also, a straight line passing through the central portion in the width direction X of the pet diaper 1 and parallel to the longitudinal direction Y is represented as the "center line CL".

[0041] The pet diaper 1 includes a main body portion 2 extending in the longitudinal direction Y and the width direction X. The main body portion 2 absorbs urine excreted by the pet wearing the pet diaper 1. The main body portion 2 is divided into a ventral portion 21 located on the ventral side of the pet in the worn state, a dorsal portion 22 located on the dorsal side of the pet in the worn state, and a crotch portion 23 located between the ventral portion 21 and the dorsal portion 22. The ventral portion 21, the crotch portion 23, and the dorsal portion 22 are arranged along the longitudinal direction Y from the ventral side (front) to the dorsal side (rear) of the pet. As an example, when the main body portion 2 is equally divided into four parts in the longitudinal direction Y, one region located most ventrally corresponds to the ventral portion 21, one region located most dorsally corresponds to the dorsal portion 22, and two regions located between the ventral portion 21 and the dorsal portion 22 (that is, the central portion of the main body portion 2 in the longitudinal direction Y) correspond to the crotch portion 23.

[0042] The main body portion 2 has a surface sheet 3, a back sheet 4, a pair of side sheets 5, and an absorber 10.

[0043] The surface sheet 3 is arranged at a position facing the pet's skin in the worn state and is a liquid-permeable sheet facing the pet's skin. The surface sheet 3 can be formed of, for example, a liquid-permeable non-woven fabric or woven fabric, a synthetic resin film having liquid-permeable holes, or a composite sheet thereof.

[0044] The back sheet 4 is a liquid-impermeable sheet that is disposed on the side opposite to the pet's skin side in the worn state. The back sheet 4 can be formed of, for example, a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet thereof. In the present embodiment, the back sheet 4 has an outer sheet 41 (outer side sheet) and a leak-proof sheet 42 (inner side sheet). The outer sheet 41 is disposed on the outer side (non-skin side) of the leak-proof sheet 42 and constitutes the outermost surface of the main body portion 2. The outer sheet 41 is formed of, for example, a liquid-impermeable nonwoven fabric. The leak-proof sheet 42 is disposed between the outer sheet 41 and the absorber 10 (absorbent core 11) and is joined to the outer sheet 41. The leak-proof sheet 42 is formed of, for example, a liquid-impermeable synthetic resin film.

[0045] The pair of side sheets 5 are sheets for forming leg side gathers LSG, which are standing leak-proof gathers, at the ventral part 21 and the crotch part 23. The side sheet 5 can be formed of, for example, a nonwoven fabric having water repellency or hydrophobicity. As shown in FIGS. 1 and 3, each side sheet 5 is disposed on both sides of the main body portion 2 in the width direction X so as to expose the central portion of the surface sheet 3 in the width direction X. Each side sheet 5 extends from the ventral end 2a of the main body portion 2 to the dorsal end 2b of the main body portion 2 along the longitudinal direction Y. As shown in FIG. 3, the outer edge of each side sheet 5 in the width direction X coincides with the outer edge of the back sheet 4 and constitutes the outer edge portion 2c of the main body portion 2. Further, the inner portion of each side sheet 5 in the width direction X is folded back to the non-skin side. An elastic member 7 extending in the longitudinal direction Y is disposed between the folded side sheets 5 from the ventral part 21 to the crotch part 23. The elastic member 7 is, for example, thread rubber.

[0046] As shown in FIG. 1, each side sheet 5 is joined (fixed) to the surface sheet 3 at a fixing portion R that is surrounded by a dashed line and has diagonal hatching. Each fixing portion R is arranged over the entire length in the longitudinal direction Y of the main body portion 2. Each fixing portion R has a fixing portion R1 that extends in the longitudinal direction Y along the outer edge portion in the width direction X of the fixing portion R, a rectangular fixing portion R2 formed at the ventral end portion in the longitudinal direction Y of the fixing portion R, and a rectangular fixing portion R3 formed at the dorsal end portion in the longitudinal direction Y of the fixing portion R.

[0047] A standing portion 5a is formed by a portion between the inner end portion R2a in the longitudinal direction Y of the fixing portion R2 and the inner end portion R3a in the longitudinal direction Y of the fixing portion R3 of the side sheet 5 (that is, a portion of the side sheet 5 where the elastic member 7 is arranged and is not joined to the surface sheet 3). The standing portion 5a is a portion that functions as a leg side gather LSG by standing up due to the contraction of the elastic member 7. More specifically, the standing portion 5a is configured to stand up with the inner end portion R1a in the width direction X of the fixing portion R1 as a fulcrum by having both end portions in the longitudinal direction Y fixed by the fixing portions R2 and R3 and contracting in the longitudinal direction Y. That is, the end portion R1a of the fixing portion R1 functions as a standing fulcrum of the leg side gather LSG.

[0048] The absorber 10 is arranged between the surface sheet 3 and the back sheet 4. As shown in FIG. 3, the absorber 10 is composed of an absorbent core 11 and a core wrap 12 that covers the upper and lower surfaces of the absorbent core 11. The absorbent core 11 is arranged so as to cover the ventral portion 21 and the crotch portion 23 and is not arranged at the dorsal portion 22. The absorbent core 11 is a member that absorbs the urine of a pet and has liquid absorbency and liquid retention properties. The absorbent core 11 is, for example, a laminate of an absorbent material containing pulverized pulp or a superabsorbent polymer (SAP), or a mixture thereof. The core wrap 12 is, for example, a tissue or a nonwoven fabric sheet.

[0049] As an example, when viewed in the thickness direction Z, the absorbent core 11 is formed in a ladle shape (or an hourglass shape), and the central portion in the longitudinal direction Y of the absorbent core 11 has a constricted shape. That is, as shown in FIG. 2, the absorbent core 11 includes a central portion 111 (i.e., a constricted and narrowed portion) having a minimum width w1, and a pair of wide portions 112 disposed on both sides of the central portion 111 in the longitudinal direction Y and having a maximum width w2.

[0050] As shown in FIGS. 1 and 2, the main body 2 is provided with a tail insertion portion 6 for inserting the tail of a pet. As an example, the tail insertion portion 6 is composed of one cut portion 6a and two cut portions 6b. The cut portions 6a and 6b penetrate the main body 2 in the thickness direction Z. The cut portion 6a is provided at the center in the width direction X of a region on the back side of the absorbent core 11 of the crotch portion 23. The cut portion 6a is formed in a curved surface shape (arc shape) that extends in the width direction X with the center line CL interposed therebetween and protrudes toward the back side. The two cut portions 6b are provided on both sides with the center line CL interposed therebetween at positions closer to the cut portion 6a on the back side than the cut portion 6a. The two cut portions 6b have a linear shape inclined with respect to the longitudinal direction Y such that the distance between the two cut portions 6b widens from the ventral side toward the dorsal side.

[0051] Between the ends in the width direction X of the cut portion 6a, by pushing the portion on the belly side rather than the cut portion 6a into the non-skin side, a substantially semi-circular opening for inserting the tail of the pet is formed. Further, by breaking the portion of the main body portion 2 between the cut portion 6a and the two cut portions 6b, the cut portion 6a and the two cut portions 6b can be connected. In this case, as shown in FIG. 2, it is possible to form an opening having a region A larger than the opening formed by the cut portion 6a. Thus, in the present embodiment, the tail insertion portion 6 is configured such that the opening size can be adjusted (enlarged) by connecting the two cut portions 6b to the cut portion 6a as necessary. Note that the shape and size of the tail insertion portion 6 are not limited to those of the present embodiment. For example, when size adjustment is not necessary, the cut portion 6b may be omitted. Further, the tail insertion portion 6 may be formed by an opening having a predetermined area instead of a cut, or may be formed by a combination of an opening and a cut.

[0052] On both sides in the width direction X of the ventral side portion 21, a pair of flap portions 31 protruding outward in the width direction X are formed. Similarly, on both sides in the width direction X of the dorsal side portion 22, a pair of flap portions 32 protruding outward in the width direction X are formed. A pair of fastening tabs 50 are provided on the pair of flap portions 31. A target portion 53 is provided in the region between the pair of flap portions 32 in the dorsal side portion 22.

[0053] Each fastening tab 50 extends outward in the width direction X from both ends of the main body portion 2 (flap portion 31) in the width direction X (end portion 31a of the flap portion 31 in the width direction X). Each fastening tab 50 has a rectangular shape that is long in the width direction X and is disposed in the vicinity of the ventral end 2a of the main body portion 2. Each fastening tab 50 has a base material sheet 51 joined to the flap portion 31 and an engaging portion 52 provided on the skin side surface of the base material sheet 51. A part of the base material sheet 51 is sandwiched, for example, between the side sheet 5 and the back sheet 4. The engaging portion 52 is, for example, a surface fastener (for example, a plurality of hook-shaped members) configured to be engageable with the target portion 53.

[0054] The target portion 53 has a rectangular shape that is long in the width direction X, and is disposed in the vicinity of the dorsal end portion 2b of the main body portion 2 on the non-skin side surface of the back sheet 4 (outer cover sheet 41). As shown in FIG. 4, in the mounted state, the engaging portions 52 of the pair of fastening tabs 50 are engaged with the target portion 53. FIG. 4 shows the state in which the pet P is standing in the mounted state.

[0055] The main body portion 2 is disposed to extend in the longitudinal direction Y along the outer edge portion 2c of the main body portion 2 in the width direction X (in this embodiment, the portion of the outer edge portion 2c that is located in the crotch portion 23 where the flap portions 31 and 32 are not provided), and has a pair of elastic members 8 that contract in the longitudinal direction Y. Each elastic member 8 is, for example, a thread rubber or the like similar to the elastic member 7. In this embodiment, as shown in FIG. 3, each elastic member 8 is disposed between the front surface sheet 3 and the back surface sheet 4 (leak-proof sheet 42). As shown in FIG. 4, in the mounted state, when the pair of elastic members 8 contract in the longitudinal direction Y, the outer edge portion 2c of the main body portion 2 functions as a leg gather that fits around the legs of the pet P.

[0056] As shown in FIGS. 1 to 3, in the region ventral to the tail insertion portion 6 of the main body portion 2, a non-joined region N is provided where the outer cover sheet 41 and the leak-proof sheet 42 are not joined to each other. More specifically, the outer cover sheet 41 and the leak-proof sheet 42 are joined via an adhesive such as a hot melt adhesive (HMA) in regions other than the non-joined region N. On the other hand, in the non-joined region N, the above adhesive is not provided between the outer cover sheet 41 and the leak-proof sheet 42, and the outer cover sheet 41 is configured to be detachable from the leak-proof sheet 42. That is, in the mounted state, when a force is applied to move the outer cover sheet 41 of the non-joined region N in the in-plane direction of the sheet (i.e., the direction orthogonal to the thickness direction Z), the outer cover sheet 41 is configured to be separable and movable from the leak-proof sheet 42.

[0057] In this embodiment, the non-bonding region N has a rectangular shape that is long in the longitudinal direction Y. In at least a partial range of the non-bonding region N that has a predetermined length in the longitudinal direction Y (in this embodiment, the entire region occupied by the non-bonding region N in the longitudinal direction Y; hereinafter referred to as the "effective region"), the width w3 of the non-bonding region N (see FIGS. 2 and 3) is made longer than the distance d (see FIGS. 2 and 3) from the outer end Na of the non-bonding region N in the width direction X to the outer edge 2c of the main body portion 2. When the line along the outer edge 2c is not parallel to the line along the outer end Na of the non-bonding region N, the distance d may vary depending on the position in the longitudinal direction Y, but in the effective region, the above relationship "w3 > d" only needs to hold.

[0058] In order to preferably exhibit the effect of the non-bonding region N described later, it is preferable that the above relationship "w3 > d" holds in the effective region that occupies a length of 1 / 5 or more of the length of the main body portion 2 in the longitudinal direction Y. That is, it is preferable that the length in the longitudinal direction Y of the effective region in the non-bonding region N where the above relationship "w3 > d" holds is 1 / 5 or more of the length of the main body portion 2 in the longitudinal direction Y. As shown in FIGS. 1 and 2, in this embodiment, the non-bonding region N has a region about 1 / 2 of the length of the main body portion 2 in the longitudinal direction Y, and the above relationship "w3 > d" holds in the entire range in the longitudinal direction Y. Alternatively, from the viewpoint of effectively reducing the friction around the legs of the hind legs of the pet, it is preferable that the length in the longitudinal direction Y of the effective region in the non-bonding region N where the above relationship "w3 > d" holds is 1 / 4 or more of the length from the ventral end 2a of the main body portion 2 to the ventral end of the tail insertion portion 6 (in this embodiment, the most ventral end of the cut portion 6a).

[0059] Next, the effects of the pet diaper 1 described above will be explained. When the pet performs daily activities such as walking while wearing the pet diaper 1, mainly, the ventral part of the main body 2 (outer cover sheet 41) that is ventral to the tail insertion part 6 rubs against the hind legs of the pet. FIG. 5 is a diagram schematically showing the state of the back sheet 4 between the hind legs P1 of the pet in the worn state. In the pet diaper 1, a non-bonding area N is provided in the area where the hind legs P1 of the pet rub (contact) with the outer cover sheet 41 in this way. As described above, in the non-bonding area N, since the outer cover sheet 41 is not bonded to the leak-proof sheet 42, the outer cover sheet 41 can move freely away from the leak-proof sheet 42. Further, in the effective area having a predetermined length in the longitudinal direction Y of the non-bonding area N, the width w3 of the non-bonding area N is made longer than the distance d from the outer end Na of the non-bonding area N to the outer edge 2c of the main body 2. That is, at least in the above-mentioned effective area, a non-bonding area N wider than the area where the outer cover sheet 41 and the leak-proof sheet 42 are bonded (the area having a width of the distance d) is provided near the outer edge 2c of the main body 2. Thereby, in the above-mentioned effective area, when the hind legs P1 of the pet rub against the outer cover sheet 41, the outer cover sheet 41 can preferably move away from the leak-proof sheet 42 and slide. That is, as shown in FIG. 5, in the non-bonding area N, only the outer cover sheet 41 can slide independently of the leak-proof sheet 42 in the direction indicated by the arrow B in FIG. 5. As a result, the outer cover sheet 41 moves following the hind legs P1 of the pet, and the friction generated between the outer cover sheet 41 and the hind legs P1 of the pet can be reduced. Therefore, according to the pet diaper 1, the occurrence of chafing of the hind legs P1 of the pet can be suppressed.

[0060] As shown in FIG. 2, the outer end portion Na of the non-bonding region N is disposed outside the end portion 111a in the width direction X of the portion having the minimum width w1 of the central portion 111 of the absorbent core 11. In the region Ra (see FIG. 2) outside the constricted region of the absorbent core 11 (the portion having the minimum width w1 of the central portion 111) in the width direction X, the rear legs of the pet and the outer sheet 41 are likely to rub against each other. Therefore, by providing the non-bonding region N so as to reach outside the constricted region of the absorbent core 11 as described above, the friction generated between the rear legs P1 of the pet and the outer sheet 41 can be effectively reduced.

[0061] Furthermore, in the present embodiment, as shown in FIG. 2, the outer end portion Na of the non-bonding region N is disposed outside the end portion 112a in the width direction X of the wide portion 112 of the absorbent core 11. According to the above configuration, by providing the non-bonding region N so as to reach outside the entire absorbent core 11 in the width direction X, the friction generated between the rear legs P1 of the pet and the outer sheet 41 can be more effectively reduced.

[0062] As shown in FIGS. 1 and 3, the outer end portion Na of the non-bonding region N is disposed outside the standing fulcrum of the leg side gather LSG extending in the longitudinal direction Y (that is, the end portion R1a of the fixed portion R1). In the region outside the standing fulcrum of the leg side gather LSG, the rear legs P1 of the pet and the outer sheet 41 are likely to rub against each other. More specifically, the closer the portion is to the outer edge portion 2c on the side of the absorbent core 11, the more likely the rear legs P1 and the outer sheet 41 are to rub against each other. Therefore, by providing the non-bonding region N so as to reach outside the above standing fulcrum (end portion R1a), the friction generated between the rear legs P1 of the pet and the outer sheet 41 can be effectively reduced.

[0063] As shown in FIGS. 1 and 2, at least one of both ends (i.e., ends R2a and R3a) of the leg side gather LSG is arranged at a position overlapping a portion protruding outward from the central portion 111 in the width direction X of the wide portion 112. According to the above configuration, the contraction force of the leg side gather LSG can be effectively transmitted to the region outside the central portion 111 of the absorbent core 11 in the width direction X. That is, by arranging the fixed end of the leg side gather LSG at a position overlapping a highly rigid portion (wide portion 112) overlapping the absorbent core 11, the contraction force can be preferably transmitted to the less rigid portion outside the central portion 111 of the absorbent core 11 in the width direction X. As a result, in the non-bonded region N included in the region, the outer sheet 41 can be preferably released with respect to the leak-proof sheet 42, so that the friction generated between the rear leg P1 of the pet and the outer sheet 41 can be more effectively reduced. Note that only one of the ends R2a and R3a may be arranged so as to overlap the protruding portion of the wide portion 112. In such a case, although the effect is reduced as compared with the case where both ends R2a and R3a overlap the protruding portion of the wide portion 112 as in the present embodiment, the same effect can be obtained.

[0064] As shown in FIG. 2, the region where the non-bonding region N and the absorbent core 11 overlap (in this embodiment, the entire region where the absorbent core 11 is disposed) extends from the inner end (end 11b in this embodiment) of the end Nb of the non-bonding region N on the ventral side (one side) in the longitudinal direction Y and the end 11b of the absorbent core 11 to the inner end (end 11c in this embodiment) of the end Nc of the non-bonding region N on the dorsal side (the other side) in the longitudinal direction Y and the end 11c of the absorbent core 11, and is continuously provided along the longitudinal direction Y. In other words, the region where the non-bonding region N and the absorbent core 11 overlap is continuously provided without being divided in the longitudinal direction Y. In the region where the non-bonding region N and the absorbent core 11 overlap, the outer wrapper sheet 41, which has relatively low rigidity compared to the absorbent core 11 with relatively high rigidity, is likely to deform and separate from the leak-proof sheet 42. By continuously providing such a region (that is, a region where only the outer wrapper sheet 41 is likely to move following the movement of the rear leg P1 of the pet due to the difference in rigidity between the absorbent core 11 and the outer wrapper sheet 41) along the longitudinal direction Y, the friction generated between the rear leg P1 of the pet and the outer wrapper sheet 41 can be more effectively reduced. Further, in this embodiment, the non-bonding region N is provided so as to straddle the center line CL. Thereby, the above effect can be obtained more preferably.

[0065] As shown in FIG. 2, the non-bonding region N is provided in a range where the central portion 111 of the absorbent core 11 is located at least in the longitudinal direction Y. That is, the end portion Nb of the non-bonding region N is located on the ventral side of the ventral end portion of the central portion 111, and the end portion Nc of the non-bonding region N is located on the dorsal side of the dorsal end portion of the central portion 111. The region where the central portion 111 is disposed in the main body portion 2 is likely to shrink in the width direction X when the pet diaper 1 is attached to the pet and is sandwiched between the pet's groin (portion near the base of the left and right rear legs P1), and the rear legs P1 of the pet and the outer sheet 41 are likely to rub against each other. Therefore, by providing the non-bonding region N at least in such a region, the friction generated between the rear legs P1 of the pet and the outer sheet 41 can be effectively reduced. Further, in the present embodiment, the end portions Nb and Nc of the non-bonding region N in the longitudinal direction Y are disposed outside the end portions 11b and 11c of the absorbent core 11 in the longitudinal direction Y. Thereby, the above effect can be obtained more reliably.

[0066] As shown in FIG. 1, the end portions Nb and Nc of the non-bonding region N in the longitudinal direction Y are disposed outside both end portions (that is, end portions R2a and R3a) of the leg side gather LSG. The region between both end portions (fixed ends) of the leg side gather LSG in the longitudinal direction Y is likely to deform the outer sheet 41 (is likely to separate from the leak-proof sheet 42) due to the contraction of the leg side gather LSG. Therefore, by providing the non-bonding region N in such a region, the friction generated between the rear legs P1 of the pet and the outer sheet 41 can be effectively reduced.

[0067] As shown in FIGS. 1 and 2, the non-bonding region N is not provided in the region overlapping the tail insertion portion 6 and the region dorsal to the tail insertion portion 6. According to the above configuration, for the dorsal region where the effect of reducing the friction between the hind legs P1 of the pet and the outer sheet 41 described above is small (that is, the hind legs P1 of the pet and the outer sheet 41 are not easily rubbed), by bonding the leak-proof sheet 42 and the outer sheet 41, peeling of the outer sheet 41 can be appropriately prevented. Also, even in the region overlapping the tail insertion portion 6, by bonding the leak-proof sheet 42 and the outer sheet 41, peeling of the outer sheet 41 starting from the edge of the tail insertion portion 6 can be appropriately prevented. Note that the edge of the tail insertion portion 6 refers to the cut itself when the tail insertion portion 6 is formed by a cut as in the present embodiment, and means the edge of the opening when the tail insertion portion 6 is formed by an opening.

[0068] Further, the outer sheet 41 is preferably formed of a non-woven fabric having a plurality of joints by heat fusion. Examples of such non-woven fabrics include, for example, spunbond non-woven fabric, air-through non-woven fabric, meltblown non-woven fabric, point-bond non-woven fabric, and the like. By configuring the outer sheet 41 with the non-woven fabric as described above, breakage of the outer sheet 41 can be preferably suppressed. Also, in the non-bonding region N, when the outer sheet 41 moves relative to the leak-proof sheet 42, friction occurs between the outer sheet 41 and the leak-proof sheet 42, and generation of fuzzing of the outer sheet 41 due to such friction can be suppressed.

[0069] [Modification Example] As described above, the embodiments of the present disclosure have been described, but the present disclosure is not limited to the above embodiments. The materials and shapes of each configuration are not limited to the materials and shapes described above, and various materials and shapes can be adopted. Also, some of the configurations included in the above-described embodiments may be changed or omitted, or other configurations may be added. For example, the range and shape in which the non-bonding region is formed are not limited to the range and shape of the non-bonding region N according to the above embodiment. Hereinafter, several specific modification examples will be described.

[0070] (First Modification Example) Referring to FIGS. 6 and 7, the pet diaper 1A according to the first modification will be described. The pet diaper 1A is different from the pet diaper 1 in that it has a non-bonded region N composed of a plurality (two in this embodiment) of regions N1 and N2 instead of a single non-bonded region N. More specifically, in the pet diaper 1A, the non-bonded region N has a region N1 (first region) and a region N2 (second region) that are spaced apart from each other with the center line CL interposed therebetween. That is, the leak-proof sheet 42 and the outer sheet 41 are joined to each other in the region between the region N1 and the region N2.

[0071] In the pet diaper 1A, for each of the regions N1 and N2, a relationship corresponding to the relationship "w3 > d" for the effective region of the non-bonded region N described above is established. That is, in at least a part of the region of the region N1 having a predetermined length in the longitudinal direction Y (in this embodiment, the region where the flap portion 31 is not provided in the longitudinal direction Y; hereinafter referred to as the "first effective region"), the width w31 of the region N1 is made longer than the distance d1 from the outer end portion N1a of the region N1 in the width direction X to the outer edge portion 2c of the main body portion 2. That is, "w31 > d1" is established in the first effective region. As a result, in the first effective region, a non-bonded region (region N1) wider than the region where the outer sheet 41 and the leak-proof sheet 42 are joined (the region having a width of the distance d1) is provided near the outer edge portion 2c of the main body portion 2. Thereby, when the rear leg P1 (right rear leg) of the pet rubs against the outer sheet 41 in the first effective region, the outer sheet 41 can suitably separate from the leak-proof sheet 42 and slide.

[0072] Similarly, in at least a partial range of the region N2 having a predetermined length in the longitudinal direction Y (in this embodiment, the region where the flap portion 31 is not provided in the longitudinal direction Y. Hereinafter referred to as the "second effective region"), the width w32 of the region N2 is made longer than the distance d2 from the outer end portion N2a of the region N2 in the width direction X to the outer edge portion 2c of the main body portion 2. That is, "w32 > d2" is satisfied in the second effective region. As a result, in the second effective region, a non-joined region (region N2) wider than the region where the exterior sheet 41 and the leak-proof sheet 42 are joined (region having the width of the distance d2) is provided near the outer edge portion 2c of the main body portion 2. Thereby, when the rear leg portion P1 (left rear leg) of the pet rubs against the exterior sheet 41 in the second effective region, the exterior sheet 41 can suitably separate from the leak-proof sheet 42 and slide. As described above, also with the pet diaper 1A, similar to the pet diaper 1, the exterior sheet 41 moves following the rear leg portion P1 of the pet, and the friction generated between the exterior sheet 41 and the rear leg portion P1 of the pet can be reduced, so that the occurrence of chafing of the rear leg portion P1 of the pet can be suppressed.

[0073] Furthermore, as shown in FIGS. 6 and 7, in the pet diaper 1A, by providing a joining region C where the leak-proof sheet 42 and the exterior sheet 41 are joined between the region N1 and the region N2, the range in which the exterior sheet 41 separates from the leak-proof sheet 42 and moves due to the front and rear displacement of the left and right rear leg portions P1 of the pet during walking can be divided by the joining region C. Thereby, it is possible to suppress the exterior sheet 41 from moving too much (being pulled too much) in a specific direction with respect to the leak-proof sheet 42, and as a result, it is possible to suppress the occurrence of damage to the back sheet 4 (for example, tearing of the exterior sheet 41, etc.).

[0074] (Second Modification Example) Referring to Fig. 8, the pet diaper 1B according to the second modified example will be described. The pet diaper 1B is different from the pet diaper 1 in that the outer end portion Na of the non-joined region N in the width direction X is disposed outside the elastic member 8. As described above, since the rear leg portion P1 and the outer cover sheet 41 are more likely to rub against each other in a portion closer to the outer edge portion 2c, by providing the non-joined region N so as to reach the outside in the width direction X beyond the elastic member 8, the friction generated between the rear leg portion P1 of the pet and the outer cover sheet 41 can be effectively reduced. Further, by contracting the leak-proof sheet 42 due to the contraction of the elastic member 8, in the region of the non-joined region N that overlaps the elastic member 8, the outer cover sheet 41 can be suitably released with respect to the leak-proof sheet 42, so that the friction generated between the rear leg portion P1 of the pet and the outer cover sheet 41 can be reduced more effectively.

Explanation of Signs

[0075] 1, 1A, 1B... Pet diapers, 2... Main body portion, 2c... Outer edge portion, 3... Surface sheet, 4... Back sheet, 5... Side sheet, 6... Tail insertion portion, 7, 8... Elastic members, 11... Absorbent core, 41... Outer cover sheet (outer sheet), 42... Leak-proof sheet (inner sheet), 111... Central portion, 112... Wide portion, CL... Center line, LSG... Leg side gather, N... Non-joined region, N1... Region (first region), N2... Region (second region), Na, N1a, N2a... Outer end portions, P... Pet, R1a... End portion (standing fulcrum).

Claims

1. A pet diaper to be worn by a pet, A main body portion having a longitudinal direction connecting the ventral side to the dorsal side of the pet and a width direction perpendicular to the longitudinal direction, The main body portion is A top sheet is disposed in a position facing the skin of the pet when the pet diaper is worn on the pet; A back sheet that is disposed on the opposite side to the pet's skin in the attached state; an absorbent core disposed between the top sheet and the back sheet, The main body is provided with a tail insertion portion for inserting the tail of the pet, The back sheet is An outer sheet constituting the outermost surface of the main body; an inner sheet disposed between the outer sheet and the absorbent core and joined to the outer sheet; a non-bonded region in which the outer sheet and the inner sheet are not bonded to each other is provided in a region of the main body portion on the ventral side of the tail insertion portion, A pet diaper, wherein in at least a portion of the non-bonded region having a predetermined length in the longitudinal direction, the width of the non-bonded region is longer than the distance from the outer end of the non-bonded region in the width direction to the outer edge of the main body portion.

2. The absorbent core comprises: a central portion including a portion having a minimum width; A pair of wide portions having a maximum width and disposed on both sides of the central portion in the longitudinal direction, an outer end portion of the non-bonded region in the width direction is disposed outside an end portion of the central portion having the minimum width in the width direction; The pet diaper according to claim 1.

3. An outer end portion of the non-bonded region in the width direction is disposed outward from an end portion of the wide portion in the width direction. The pet diaper according to claim 2.

4. the main body portion has leg side gathers configured such that both ends in the longitudinal direction are fixed and a portion between the both ends is contracted in the longitudinal direction to be able to stand up, An outer end portion of the non-jointed region in the width direction is disposed outside a standing fulcrum of the leg side gather extending in the longitudinal direction. The pet diaper according to claim 1.

5. The absorbent core comprises: a central portion including a portion having a minimum width; A pair of wide portions having a maximum width and disposed on both sides of the central portion in the longitudinal direction, At least one of the two end portions of the leg side gathers is disposed at a position overlapping a portion of the wide portion that protrudes outward from the central portion in the width direction. The pet diaper according to claim 4.

6. the main body portion has an elastic member that is disposed along the outer edge portion of the main body portion and extends in the longitudinal direction and that contracts in the longitudinal direction; An outer end portion of the non-bonded region in the width direction is disposed outside the elastic member. The pet diaper according to claim 1.

7. The region where the non-bonded region and the absorbent core overlap is provided continuously along the longitudinal direction from an inner end of the end of the non-bonded region and the end of the absorbent core on one side in the longitudinal direction to an inner end of the end of the non-bonded region and the end of the absorbent core on the other side in the longitudinal direction. The pet diaper according to claim 1.

8. The non-bonded region is provided so as to straddle a center line extending in the longitudinal direction through a central portion of the main body portion in the width direction. The pet diaper according to claim 7.

9. The non-bonded region includes a first region and a second region that are spaced apart from each other across a center line that passes through a center portion of the main body portion in the width direction and extends in the longitudinal direction, The inner sheet and the outer sheet are joined to each other in a region between the first region and the second region. The pet diaper according to claim 1.

10. The absorbent core comprises: a central portion including a portion having a minimum width; A pair of wide portions having a maximum width and disposed on both sides of the central portion in the longitudinal direction, The non-bonded region is provided at least in a range in which the central portion is located in the longitudinal direction. The pet diaper according to claim 1.

11. an end portion of the non-bonded region in the longitudinal direction is disposed outside an end portion of the absorbent core in the longitudinal direction; The pet diaper according to claim 10.

12. the main body portion has leg side gathers configured such that both ends in the longitudinal direction are fixed and a portion between the both ends is contracted in the longitudinal direction to be able to stand up, The end of the non-jointed region in the longitudinal direction is disposed outside the both end portions of the leg side gathers. The pet diaper according to claim 1.

13. The non-jointed region is not provided in a region overlapping with the tail insertion part and in a region on the back side of the tail insertion part. The pet diaper according to claim 1.

14. The outer sheet is formed of a nonwoven fabric having a plurality of heat-sealed joints. The pet diaper according to claim 1.

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