Pet Diaper

Abstract

To provide a diaper for a pet capable of enhancing air permeability in a fitting state while suppressing urine leakage caused by fitting displacement.SOLUTION: A diaper 1 for a pet includes a body part 2. The body part 2 has a surface sheet 3, a rear face sheet 4, and an absorbent core 11. At a position which does not overlap with the absorbent core 11 in the body part 2, at least one opening or at least one notch part 91 for forming at least one opening is provided, the at least one opening or at least one notch part for forming at least one opening not allowing a tail of the pet to be inserted therethrough and enhancing air permeability of an inner space facing the surface sheet 3 in a fitting state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to pet diapers.

Background Art

[0002] Conventionally, pet diapers for pets such as dogs and cats have been known. For example, Patent Document 1 discloses a pet diaper provided with a tail insertion part (cut) for inserting a pet's tail into 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] Generally, a pet diaper provided with an absorbent core for absorbing a pet's urine has a structure that covers not only the pet's crotch but also the back in order to prevent urine leakage due to displacement during wearing. For this reason, there has been room for improvement in comfort during wearing, particularly in the breathability of the pet diaper.

[0005] Therefore, an aspect of the present disclosure aims to provide a pet diaper that can improve breathability in a worn state while suppressing urine leakage caused by displacement during wearing.

Means for Solving the Problems

[0006] The diaper for pets according to one aspect of the present disclosure is a diaper for pets that is worn on a pet so as to cover at least the pet's torso circumference. In a worn state where the diaper for pets is worn on the pet, the diaper for pets includes a main body portion having a width direction along the torso circumference direction of the pet and a front-back direction orthogonal to the width direction. The main body portion has a surface sheet disposed at a position facing the pet's skin in the worn state, 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. At a position in the main body portion that does not overlap with the absorbent core, at least one opening or at least one opening forming portion for forming at least one opening is provided to improve the air permeability of the internal space where the pet's tail is not inserted and that faces the surface sheet in the worn state.

Effects of the Invention

[0007] According to the present disclosure, it is possible to provide a diaper for pets that can improve air permeability in the worn state while suppressing urine leakage caused by displacement during wearing.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

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Figure 10

Figure 11

Figure 12

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Figure 14

Mode for Carrying Out the Invention

[0009] From the description of this specification and the accompanying drawings, at least the following aspects 1 to 36 become clear.

[0010] (Aspect 1) A pet diaper that is worn on a pet so as to cover at least the pet's torso circumference, In the wearing state where the pet diaper is worn on the pet, it includes a main body portion having a width direction along the torso circumference direction of the pet and a front-back direction orthogonal to the width direction, The main body portion A surface sheet disposed at a position facing the pet's skin in the wearing state, A back sheet disposed on the side opposite to the pet's skin side in the wearing state, An absorbent core disposed between the surface sheet and the back sheet, At least one opening for improving the air permeability of the internal space where the pet's tail is not inserted and facing the surface sheet in the wearing state, or at least one opening forming portion for forming the at least one opening, is provided at a position in the main body portion that does not overlap with the absorbent core. A pet diaper.

[0011] The pet diaper described above is worn on the pet so as to cover the pet's torso circumference. Thereby, displacement during wearing is appropriately suppressed. Further, in addition to the opening (tail insertion hole) that can be formed in the pet diaper for inserting the pet's tail in the worn state, an opening (or an opening forming portion for forming the opening) for improving the air permeability of the internal space is provided. By forming such an opening, the air permeability in the worn state can be improved. Further, since the opening is formed at a position that does not overlap with the absorbent core, the absorption performance of the pet diaper is not impaired by the opening, and the urine absorbed by the absorbent core does not leak out through the opening. Therefore, according to the above pet diaper, it is possible to improve the air permeability in the worn state while suppressing urine leakage caused by displacement during wearing.

[0012] (Aspect 2) The main body portion is provided with a tail insertion portion for inserting the pet's tail, The at least one opening has a different shape or size from the tail insertion portion, and is a pet diaper according to Aspect 1.

[0013] According to Aspect 2, it becomes possible to easily distinguish between the opening provided for improving air permeability and the tail insertion portion based on the shape or size. As a result, it is possible to prevent a wearer (for example, the pet owner, etc.) who wears the pet diaper on the pet from accidentally inserting the pet's tail into the ventilation opening.

[0014] (Aspect 3) The size of the at least one opening is smaller than the size of the opening formed in the tail insertion portion, and is a pet diaper according to Aspect 2.

[0015] According to Aspect 3, it becomes possible to easily distinguish between the two based on the difference in size between the ventilation opening and the opening formed by the tail insertion portion.

[0016] (Aspect 4) The at least one opening has a cut-out shape obtained by cutting out a part of the main body portion, and the disposable diaper for pets according to any one of Aspects 1 to 3.

[0017] According to Aspect 4, even when the opening is deformed in the worn state, it becomes difficult for the opening to close, so that a highly breathable state can be suitably maintained.

[0018] (Aspect 5) The at least one opening is formed by a cut, and the disposable diaper for pets according to any one of Aspects 1 to 3.

[0019] According to Aspect 5, since no trimming occurs during the manufacture of the disposable diaper for pets, the manufacture of the disposable diaper for pets becomes easy.

[0020] (Aspect 6) The cut has a curved shape, and the disposable diaper for pets according to Aspect 5.

[0021] According to Aspect 6, in the worn state, the opening can be easily opened.

[0022] (Aspect 7) The cut has a shape convex toward the outside in the width direction, and the disposable diaper for pets according to Aspect 5 or 6.

[0023] According to Aspect 7, in the worn state, the opening can be easily opened and the breathability can be effectively improved.

[0024] (Aspect 8) A plurality of the cuts provided independently of each other are provided in the main body portion, and the disposable diaper for pets according to any one of Aspects 5 to 7.

[0025] According to Aspect 8, a plurality of openings corresponding to each of the plurality of incisions can be formed. Thereby, compared with the case of forming one long opening, the risk of breakage of the main body due to snagging or the like can be reduced, and a high air permeability can be realized by securing the overall opening area.

[0026] (Aspect 9) The at least one opening is disposed on the back side of the absorbent core, and the disposable diaper for pets according to any one of Aspects 1 to 8.

[0027] In the worn state, the area on the back side of the absorbent core is located on the back side (upper side) of the position facing the pet's urine outlet (i.e., the position overlapping the absorbent core). For this reason, by forming a ventilation opening in the area on the back side of the absorbent core, the risk of urine leakage from the opening can be reduced. In addition, the back portion of a pet such as a dog or a cat (i.e., the portion of the main body facing the portion on the back side of the absorbent core) is an area that is particularly prone to sweating because there are many hairs, but by providing an opening at a position corresponding to such an area, the effect of improving the air permeability by the opening can be enhanced.

[0028] (Aspect 10) The main body is provided with a tail insertion portion for inserting the pet's tail therethrough, The at least one opening is disposed on the back side of the tail insertion portion, and the disposable diaper for pets according to Aspect 9.

[0029] According to Aspect 10, the effects described for Aspect 9 can be obtained more effectively.

[0030] (Aspect 11) The main body has a side sheet that forms leg side gathers configured to be erected by fixing both end portions in the front-rear direction and contracting a portion between the both end portions in the front-rear direction, The opening is disposed on the back side of the back side end portion of the both end portions of the leg side gathers, and the disposable diaper for pets according to Aspect 9 or 10.

[0031] According to Aspect 11, the effects described for Aspect 9 can be obtained more effectively.

[0032] (Aspect 12) A pair of fastening tabs extending outward in the width direction from both end portions of the main body portion in the width direction, A target portion disposed in a region of the main body portion dorsal to the pair of fastening tabs and engaging with the pair of fastening tabs in the mounted state, and further comprising: The at least one opening is disposed only ventral to the target portion in the front-rear direction, and is a disposable diaper according to any one of Aspects 1 to 11.

[0033] According to Aspect 12, since the ventilation opening is formed so as not to overlap the target portion, it is possible to prevent the engagement strength between the fastening tab and the target portion from being reduced by the opening.

[0034] (Aspect 13) A pair of fastening tabs extending outward in the width direction from both end portions of the main body portion in the width direction, A target portion disposed in a region of the main body portion dorsal to the pair of fastening tabs and engaging with the pair of fastening tabs in the mounted state, and further comprising: The pair of fastening tabs are provided on each of a pair of protrusions extending outward in the width direction from a region of the main body portion where the absorbent core is disposed, The at least one opening is disposed in at least one of the pair of protrusions, and is a disposable diaper according to any one of Aspects 1 to 12.

[0035] In the mounted state, when pulling a pair of fastening tabs in the width direction to engage with the target portion, the protruding portions curve and come into close contact with the pet's body. According to Aspect 13, since the openings arranged in such protruding portions are likely to open in the mounted state, the effect of improving the air permeability by the openings can be enhanced.

[0036] (Aspect 14) The at least one opening has a first opening arranged on one of the pair of protruding portions and a second opening arranged on the other of the pair of protruding portions. In the region between the first opening and the second opening of the main body portion, an elastic member that is fixed to the main body portion in a state of being extended in the width direction and extends in the width direction is provided, for the pet diaper of Aspect 13.

[0037] According to Aspect 14, in the mounted state, since a force that causes the elastic member to contract in the width direction acts, the openings (the first opening and the second opening) arranged in the protruding portions are even more likely to open, so that the effect of improving the air permeability by the openings can be further enhanced.

[0038] (Aspect 15) A pair of fastening tabs extending outward in the width direction from both end portions of the main body portion in the width direction. A target portion arranged in a region of the main body portion on the back side of the pair of fastening tabs and engaging with the pair of fastening tabs in the mounted state is further provided. The pair of fastening tabs are provided on each of a pair of protruding portions extending outward in the width direction from the region of the main body portion where the absorbent core is arranged. The at least one opening is arranged between the pair of fastening tabs, for the pet diaper of any one of Aspects 1 to 14.

[0039] In the mounted state, when pulling a pair of fastening tabs in the width direction to engage with the target portion, the region between the pair of fastening tabs (i.e., the portion where the opening is provided) curves and comes into close contact with the pet's body. According to Aspect 15, since the opening arranged in such a region is likely to open in the mounted state, the effect of improving the air permeability by the opening can be enhanced.

[0040] (Aspect 16) A pair of fastening tabs extending outward in the width direction from both ends of the main body portion in the width direction, A target portion arranged in a region of the main body portion behind the pair of fastening tabs and engaging with the pair of fastening tabs in the mounted state, are further provided, The at least one opening is arranged at a position where the main body portion and the base material of the fastening tab overlap, and the disposable diaper for pets according to any one of Aspects 1 to 14.

[0041] According to Aspect 16, by forming an opening in a thick portion where the main body portion and the base material of the fastening tab overlap, particularly in a portion where air permeability is inhibited and it is likely to get stuffy, the effect of improving the air permeability by the opening can be enhanced.

[0042] (Aspect 17) The main body portion has a side sheet that forms leg side gathers configured to be able to stand up by fixing both ends in the front - rear direction and causing the portion between the both ends to contract in the front - rear direction, The opening is arranged outside the width direction from the standing fulcrum of the leg side gathers, and the disposable diaper for pets according to any one of Aspects 1 to 16.

[0043] According to Aspect 17, since the opening is formed outside the fulcrum where the leg side gathers (standing portion) that block excrement from the pet are formed, while preventing urine leakage caused by the opening, the air permeability can be improved by the opening.

[0044] (Aspect 18) The main body part is provided with a tail insertion part for inserting the tail of the pet therethrough. The opening is arranged outside the tail insertion part in the width direction, and is a disposable diaper for pets according to any one of Aspects 1 to 17.

[0045] According to Aspect 18, by arranging the opening at a position shifted outward in the width direction from the tail insertion part, in the worn state, the region of the main body part where the opening is formed can be curved along the body of the pet. As a result, the opening is likely to open, so that the air permeability can be suitably improved.

[0046] (Aspect 19) The at least one opening and the tail insertion part are provided in the third part from the ventral side when the main body part is divided into four parts in the front-back direction, and is a disposable diaper for pets according to any one of Aspects 1 to 18.

[0047] According to Aspect 19, in the worn state, since at least one opening is formed in the part corresponding to the back of the pet that is particularly prone to sweating (the third part from the ventral side), the air permeability can be suitably improved.

[0048] (Aspect 20) The main body part has side sheets that form leg side gathers configured to be able to stand up by fixing both end parts in the front-back direction and causing the part between the both end parts to contract in the front-back direction. The at least one opening is arranged at a position overlapping the side sheet, and is a disposable diaper for pets according to any one of Aspects 1 to 19.

[0049] According to Aspect 20, regarding the opening arranged at a position overlapping the side sheet, the rigidity of the part where the opening is formed increases by the amount of the side sheet, so that the opening is likely to open in the worn state. As a result, the air permeability can be suitably improved.

[0050] (Aspect 21) A leg expansion and contraction member that is fixed to the main body portion in a state of extending in the front-rear direction along the outer edge portion of the main body portion in the width direction is provided. The distance between the leg expansion and contraction member and the at least one opening in the width direction is smaller than the diameter of the smallest circle including the at least one opening. The disposable diaper for pets according to any one of Aspects 1 to 20.

[0051] In the worn state, the region where the leg expansion and contraction member is provided is likely to be in close contact with the body of the pet when the leg expansion and contraction member contracts. According to Aspect 21, by arranging an opening at a position close to such a region (that is, a position satisfying the above distance requirement), the opening can be easily opened, and the air permeability can be suitably improved.

[0052] (Aspect 22) A leg expansion and contraction member that is fixed to the main body portion in a state of extending in the front-rear direction along the outer edge portion of the main body portion in the width direction is provided. The at least one opening is arranged inside the leg expansion and contraction member in the width direction. The disposable diaper for pets according to any one of Aspects 1 to 21.

[0053] In the worn state, the portion inside the leg expansion and contraction member in the width direction is likely to be in close contact with the body of the pet. According to Aspect 22, by forming an opening in such a region, the effect of improving the air permeability by the opening can be enhanced.

[0054] (Aspect 23) The back sheet An outer sheet made of a non-woven fabric that constitutes the outermost surface of the main body portion, An inner sheet disposed between the outer sheet and the absorbent core, and has, The at least one opening penetrates at least the inner sheet in the thickness direction of the main body portion that is orthogonal to the width direction and the front-rear direction. The disposable diaper for pets according to any one of Aspects 1 to 22.

[0055] The inner sheet of the back sheet, which is disposed adjacent to the absorbent core, is usually formed of a material with low air permeability (e.g., film) for preventing leakage. According to Aspect 23, by forming an opening so as to penetrate such an inner sheet, the air permeability in the wearing state can be effectively improved.

[0056] (Aspect 24) The back sheet has an outer sheet made of a non-woven fabric that constitutes the outermost surface of the main body portion, and an inner sheet disposed between the outer sheet and the absorbent core, and at least one opening penetrates at least the surface sheet and the inner sheet in the thickness direction. The disposable diaper of Aspect 23.

[0057] In Aspect 24, since the outer sheet is made of a non-woven fabric, it has a certain degree of air permeability. Therefore, by forming an opening so as to penetrate at least the surface sheet and the inner sheet, it is possible to ventilate the inner space facing the surface sheet and the outer space facing the back sheet through the opening and the non-woven fabric (outer sheet). As described above, the air permeability in the wearing state can be effectively improved.

[0058] (Aspect 25) The opening penetrates the outer sheet in the thickness direction. The disposable diaper of Aspect 23 or 24.

[0059] According to Aspect 25, by forming an opening so as to penetrate the outer sheet made of a non-woven fabric as well, the air permeability in the wearing state can be further effectively improved.

[0060] (Aspect 26) The back sheet has an outer sheet made of a non-woven fabric that constitutes the outermost surface of the main body portion, and an inner sheet disposed between the outer sheet and the absorbent core, and The at least one opening has a third opening that penetrates the surface sheet in the thickness direction of the main body portion orthogonal to the width direction and the front-rear direction, and a fourth opening that penetrates the inner sheet in the thickness direction, The third opening and the fourth opening are arranged so as not to overlap in the thickness direction, and the disposable diaper is any one of Aspects 1 to 25.

[0061] According to Aspect 26, it is possible to improve the air permeability in the worn state by the third opening and the fourth opening, and it is possible to appropriately maintain the material strength (thickness) throughout the main body portion.

[0062] (Aspect 27) The main body portion has a horizontally long shape having a longitudinal direction and a lateral direction, and is wound around the body circumference of a pet so that the longitudinal direction follows the body circumference of the pet and is worn, and the disposable diaper is any one of Aspects 1 to 26.

[0063] According to Aspect 27, in the case of a belly wrap type disposable diaper for pets, the air permeability in the worn state can be improved by the opening (or the opening forming portion for forming the opening).

[0064] (Aspect 28) The at least one opening or the at least one opening forming portion is provided in a region of the range in which the absorbent core is arranged in the lateral direction, and the disposable diaper is the disposable diaper of Aspect 27.

[0065] In the case of a belly wrap type disposable diaper for pets, the region of the main body portion in the lateral direction where the absorbent core is arranged is a region having relatively high rigidity due to the influence of the absorbent core. By providing an opening (or an opening forming portion for forming the opening) in such a high-rigidity region, it is possible to easily widen the opening in the worn state, and thus it is possible to effectively improve the air permeability in the worn state.

[0066] (Aspect 29) The main body portion is disposed on a first side, which is one of both sides of the absorbent core in the longitudinal direction, and has a fixing member fixed to a portion of a second side opposite to the first side of the main body portion in the wearing state. The at least one opening or the at least one opening forming portion is provided in a region of a range in the lateral direction where the fixing member is disposed, the disposable diaper for pets of aspect 27 or 28.

[0067] In a belly wrap type disposable diaper for pets, a region of a range in the lateral direction where the fixing member is disposed in the main body portion becomes a region having relatively high rigidity due to the influence of the fixing member. By providing an opening (or an opening forming portion forming the opening) in such a region having high rigidity, it is possible to easily widen the opening in the wearing state, and thus the air permeability in the wearing state can be effectively improved.

[0068] (Aspect 30) The portion of the second side in the main body portion has a non-opening region provided with no at least one opening or the at least one opening forming portion and having a width longer than the width of the fixing member in the longitudinal direction, the disposable diaper for pets of aspect 29.

[0069] According to aspect 30, since it is possible to fix the fixing member to the non-opening region so that the fixing member does not protrude from the non-opening region, it is possible to suppress the overlap between an opening (or an opening formed by the opening forming portion) that can be provided outside the non-opening region in the portion of the second side of the main body portion and the fixing member. Thereby, it is possible to prevent the fixing strength of the fixing member with respect to the portion of the second side of the main body portion from decreasing due to the overlap between the opening and the fixing member, and it is possible to prevent the air permeability in the wearing state realized by the opening from being inhibited by the fixing member.

[0070] (Aspect 31) The at least one opening or the at least one opening forming portion is provided in the portion of the second side of the main body portion. In the disposable diaper according to aspect 29 or 30, the longitudinal width of the at least one opening or the at least one opening forming portion provided in the portion on the second side is longer than the longitudinal width of the fixing member.

[0071] According to aspect 31, even when the fixing member is fixed to the portion on the second side of the main body portion such that the fixing member and the opening (or the opening formed by the opening forming portion) overlap in the worn state, it is ensured that the region where the fixing member and the portion on the second side of the main body portion are fixed is continuously formed over the entire area of the fixing member in the short - hand direction. Thereby, it is possible to prevent the fixing strength of the fixing member from being reduced by the opening provided in the portion on the second side of the main body portion.

[0072] (Aspect 32) The at least one opening or the at least one opening forming portion is provided in the portion on the second side of the main body portion. In the disposable diaper according to aspect 29 or 30, the longitudinal width of the at least one opening or the at least one opening forming portion provided in the portion on the second side is shorter than the longitudinal width of the fixing member.

[0073] According to aspect 32, in the worn state, it is possible to prevent the entire opening (or the opening formed by the opening forming portion) provided in the portion on the second side of the main body portion from being covered by the fixing member. Therefore, it is possible to suppress the air permeability in the worn state (that is, the air permeability realized by the above - mentioned opening formed in the portion on the second side of the main body portion) from being inhibited by the fixing member.

[0074] (Aspect 33) The main body portion has a fixing member that is disposed on a first side, which is one of both sides of the absorbent core in the longitudinal direction, and is fixed to a portion on a second side opposite to the first side of the main body portion in the worn state. The at least one opening or the at least one opening forming portion is provided in a region between the absorbent core and the fixing member in the portion on the first side of the main body portion, the pet diaper according to any one of Aspects 27 to 32.

[0075] According to Aspect 33, at least one opening is formed in a region that faces the side portion on the dorsal side of the pet in the worn state and where the number of overlapping sheet materials tends to increase (that is, a portion that is particularly likely to get stuffy because it is likely to overlap with the portion on the second side of the main body portion). Therefore, the air permeability can be suitably improved.

[0076] (Aspect 34) Further includes a body circumference elastic member that is fixed to the main body portion in a state of being extended in the longitudinal direction and extends in the longitudinal direction along both side edge portions of the main body portion in the lateral direction. The at least one opening or the at least one opening forming portion is provided in a region within the range where the main body portion expands and contracts by the body circumference elastic member in the longitudinal direction, the pet diaper according to any one of Aspects 27 to 33.

[0077] According to Aspect 34, in the worn state, the opening provided in the main body portion (or the opening formed by the opening forming portion) is appropriately separated (released) from the pet's body by the expansion and contraction of the body circumference elastic member, so that the air permeability can be further improved.

[0078] (Aspect 35) In the region of the main body portion that overlaps with the absorbent core, an opening similar to the at least one opening or an opening forming portion similar to the at least one opening forming portion is not arranged, the pet diaper according to any one of Aspects 1 to 34.

[0079] According to Aspect 35, by not providing any ventilation openings (or opening forming portions that form the openings) in the region of the main body portion that overlaps with the absorbent core, it is possible to surely prevent the absorption performance of the pet diaper from being inhibited by the openings.

[0080] [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 redundant descriptions are omitted.

[0081] With reference to FIGS. 1 to 4, the configuration of the pet diaper 1 according to one embodiment will be described. FIG. 1 is a plan view of the pet diaper 1 seen from the skin side. FIG. 2 is a plan view of the pet diaper 1 seen from the non-skin side. FIGS. 1 and 2 show the pet diaper 1 in an extended state in which the pet diaper 1 is extended to a state where wrinkles are not formed. FIG. 3 is a cross-sectional view of the pet diaper 1 taken along line III-III in FIG. 1. FIG. 4 is a cross-sectional view of the pet diaper 1 taken along line IV-IV in FIG. 1. The pet diaper 1 is a diaper worn by 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 pet diaper 1 is a diaper for dogs.

[0082] In the present embodiment, the "skin side" is the side facing the pet's skin in the worn state where the pet diaper 1 is worn on the pet. The "non-skin side" is the side directed opposite to the pet's skin in the worn state. As shown in FIG. 1, the pet diaper 1 has a longitudinal direction Y (front-rear direction) 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 FIGS. 3 and 4, the thickness direction Z is the stacking 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".

[0083] 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 a 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 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.

[0084] The main body portion 2 has a top sheet 3, a back sheet 4, a pair of side sheets 5, and an absorber 10.

[0085] The top sheet 3 is disposed at a position facing the pet's skin in the worn state and is a liquid-permeable sheet facing the pet's skin. The top sheet 3 can be formed of, for example, a liquid-permeable nonwoven fabric or woven fabric, a synthetic resin film having liquid-permeation holes, or a composite sheet thereof.

[0086] The back sheet 4 is a liquid-impermeable sheet 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 packaging sheet 41 (outer sheet) and a leak-proof sheet 42 (inner sheet). The outer packaging sheet 41 is disposed outside (non-skin side) of the leak-proof sheet 42 and constitutes the outermost surface of the main body portion 2. The outer packaging sheet 41 is formed of, for example, a liquid-impermeable nonwoven fabric. The leak-proof sheet 42 is disposed between the outer packaging sheet 41 and the absorber 10 (absorbent core 11) and is joined to the outer packaging sheet 41. The leak-proof sheet 42 is formed of, for example, a liquid-impermeable synthetic resin film.

[0087] 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 lower crotch part 23. The side sheets 5 can be formed of, for example, a non-woven fabric having water repellency or hydrophobicity. As shown in FIGS. 1, 3, and 4, each side sheet 5 is disposed on both sides of the main body part 2 in the width direction X so as to expose the central part of the surface sheet 3 in the width direction X. Each side sheet 5 extends from the ventral end 2a of the main body part 2 to the dorsal end 2b of the main body part 2 along the longitudinal direction Y. As shown in FIGS. 3 and 4, the outer edge of each side sheet 5 in the width direction X coincides with the outer edge of the back surface sheet 4 and constitutes the outer edge part 2c of the main body part 2. Also, the inner part 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 lower crotch part 23. The elastic member 7 is, for example, thread rubber or the like.

[0088] As shown in FIG. 1, each side sheet 5 is joined (fixed) to the surface sheet 3 at a fixing part R surrounded by a dashed line and hatched with oblique lines. Each fixing part R is disposed over the entire region of the main body part 2 in the longitudinal direction Y. Each fixing part R has a fixing part R1 extending in the longitudinal direction Y along the outer edge part of the fixing part R in the width direction X, a rectangular fixing part R2 formed at the ventral end of the fixing part R in the longitudinal direction Y, and a rectangular fixing part R3 formed at the dorsal end of the fixing part R in the longitudinal direction Y.

[0089] A portion between an inner end R2a in the longitudinal direction Y of the fixing portion R2 and an inner end 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 disposed and not joined to the surface sheet 3) constitutes the standing portion 5a. 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 R1a in the width direction X of the fixing portion R1 as a fulcrum by fixing both end portions in the longitudinal direction Y to 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.

[0090] The absorber 10 is disposed between the surface sheet 3 and the back sheet 4. As shown in FIG. 3, the absorber 10 includes 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 disposed so as to cover the ventral portion 21 and the crotch portion 23 and is not disposed on the dorsal portion 22. The absorbent core 11 is a member that absorbs urine of a pet and has liquid absorbency and liquid retention. The absorbent core 11 is, for example, a laminate of an absorbent material containing pulverized pulp or superabsorbent polymer (SAP), or a mixture thereof. The core wrap 12 is, for example, a tissue or a nonwoven fabric sheet. As an example, the absorbent core 11 is formed in a ladle shape (or an hourglass shape) when viewed in the thickness direction Z, and has a constricted shape at the central portion in the longitudinal direction Y of the absorbent core 11.

[0091] 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 the region on the dorsal 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 is convex toward the dorsal 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 dorsal side than the cut portion 6a. The two cut portions 6b have a linear shape that is inclined with respect to the longitudinal direction Y so that the distance between the two cut portions 6b widens from the ventral side toward the dorsal side.

[0092] By pushing the portion on the ventral side of the cut portion 6a and closer to the ventral side than the ends in the width direction X of 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 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 required, 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. Further, a plurality of independent tail insertion portions 6 may be provided in the main body 2. For example, the main body 2 may be provided with a first tail insertion portion and a second tail insertion portion that can each independently form an opening for inserting the tail of a pet. As an example, the first tail insertion portion and the second tail insertion portion may be arranged at positions shifted from each other in the longitudinal direction Y at substantially the center in the width direction X of the main body.

[0093] On both sides of the ventral part 21 in the width direction X, a pair of flap parts F1 (protruding parts) protruding outward in the width direction X are formed. Each flap part F1 extends outward in the width direction X from the region of the main body part 2 where the absorbent core 11 is arranged. Similarly, on both sides of the dorsal part 22 in the width direction X, a pair of flap parts F2 protruding outward in the width direction X are formed. A pair of fastening tabs 50 are provided on the pair of flap parts F1. A target part 53 is provided in the region between the pair of flap parts F2 in the dorsal part 22.

[0094] Each fastening tab 50 extends outward in the width direction X from both end parts (end parts F1a in the width direction X of the flap part F1) of the main body part 2 (flap part F1) in the width direction X. Each fastening tab 50 has a rectangular shape that is long in the width direction X and is arranged near the ventral end part 2a of the main body part 2. Each fastening tab 50 has a base material sheet 51 joined to the flap part F1 and an engaging part 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 part 52 is, for example, a surface fastener (for example, a plurality of hook-shaped members) configured to be engageable with the target part 53.

[0095] The target part 53 has a rectangular shape that is long in the width direction X and is arranged near the dorsal end part 2b of the main body part 2 on the non-skin-side surface of the back sheet 4 (outer cover sheet 41). As shown in FIG. 5, in the worn state, the engaging parts 52 of the pair of fastening tabs 50 are engaged with the target part 53. FIG. 5 shows the state where the pet P is standing in the worn state.

[0096] The main body portion 2 is arranged 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 located in the crotch portion 23 where the flap portions F1 and F2 are not provided), and has a pair of elastic members 8 (leg expansion / contraction members) 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. Each elastic member 8 is provided so as to contract in the longitudinal direction Y by being fixed to the main body portion 2 in a state of being extended in the longitudinal direction Y. In this embodiment, as shown in FIG. 3, each elastic member 8 is arranged between the front surface sheet 3 and the back surface sheet 4 (leakage prevention sheet 42). As shown in FIG. 5, in the worn 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.

[0097] As shown in FIG. 1, a cutting portion 9 is provided in the region located between the tail insertion portion 6 and the elastic member 8 in the width direction X. In this embodiment, the cutting portion 9 is provided on each of both sides sandwiching the center line CL in the width direction X. Each cutting portion 9 has a plurality (four on each of the left and right in this embodiment) of cut portions 91 (opening forming portions) each having a predetermined length in the longitudinal direction Y. In each cutting portion 9, the plurality of cut portions 91 are arranged in the longitudinal direction Y. Each cut portion 91 penetrates the main body portion 2 in the thickness direction Z of the main body portion 2.

[0098] Thus, in the pet diaper 1, at least one cut portion 91 (in this embodiment, a total of eight, four on each side in the width direction X) is provided at a position that does not overlap with the absorbent core 11 in the main body portion 2 to form at least one opening 9a (see FIG. 6) that improves the air permeability of the internal space (for example, the gap S shown in FIG. 6) where the pet's tail is not inserted in the worn state and that faces the surface sheet 3. In the pet diaper 1, a cutting portion 9 (in this embodiment, four cut portions 91 extending in the longitudinal direction Y on each of the left and right sides) having a predetermined length in the longitudinal direction Y is provided in the region between the tail insertion portion 6 and the elastic member 8 in the width direction X. As a result, as shown in FIGS. 5 and 6, when the pet diaper 1 is in use (as shown in FIG. 5, the state where the pet P is standing on all fours), the portion where the cut portion 91 is provided opens, thereby forming an opening 9a that improves the air permeability of the internal space (gap S) facing the surface sheet 3.

[0099] Next, the effects of the above-described pet diaper 1 will be described. As shown in FIGS. 5 and 6, the pet diaper 1 is worn on the pet P so as to cover the pet P's torso circumference. Thereby, displacement during wearing is appropriately suppressed. Further, in addition to the opening (in this embodiment, the tail insertion hole corresponding to the region A formed by the tail insertion portion 6) that can be formed in the pet diaper 1 to insert the pet P's tail in the worn state, a cut portion 91 for forming an opening 9a that improves the air permeability of the internal space (gap S) is provided. By forming such an opening 9a, the air permeability in the worn state can be improved. Further, since the opening 9a is formed at a position that does not overlap with the absorbent core 11, the absorption performance of the pet diaper 1 is not inhibited by the opening 9a, and the urine absorbed by the absorbent core 11 does not leak out through the opening 9a. Therefore, according to the pet diaper 1, it is possible to improve the air permeability in the worn state while suppressing urine leakage caused by displacement during wearing.

[0100] At least one opening 91a (in this embodiment, an opening formed by the cut portion 91. The same applies hereinafter) has a shape or size different from that of the tail insertion portion 6. Here, the opening 9a is an opening formed according to the cut portion 91 (cut). That is, the opening 9a is an opening formed by a part of the main body portion 2 being turned up along the cut portion 91. The opening 9a has a size corresponding to the region B shown in FIG. 2 and has the maximum opening area when a part of the main body portion 2 is completely turned up along the cut portion 91. In this embodiment, the tail insertion portion 6 is composed of one cut portion 6a and two cut portions 6b and has a shape and size different from those of each opening 91a. Also, even when comparing the opening 9a (region B) and the opening formed by the tail insertion portion 6 (region A), the two have different shapes and sizes from each other. According to the above configuration, it becomes possible to easily distinguish between the opening 9a provided for improving air permeability and the tail insertion portion 6 based on the shape or size. As a result, it is possible to prevent a wearer (for example, a pet owner, etc.) who attaches the pet diaper 1 to the pet from accidentally inserting the pet's tail into the ventilation opening 9a.

[0101] The size of at least one opening 91a is smaller than the size of the opening formed in the tail insertion portion 6. As described above, the maximum area of the opening 9a is the area of the opening region (region B) when a part of the main body portion 2 is completely turned up along the cut portion 91 as shown in FIG. 2. On the other hand, the size of the opening formed in the tail insertion portion 6 is the area of the region A shown in FIG. 2. As shown in FIG. 2, the size of the opening 9a (area of region B) is smaller than the size of the opening formed by the tail insertion portion 6 (area of region A). According to the above configuration, it becomes possible to easily distinguish between the two based on the difference in size between the ventilation opening 9a and the opening formed by the tail insertion portion 6.

[0102] At least one opening 9a is formed by a cut portion 91 (cut). That is, as described above, the opening 9a is formed by a part of the main body 2 being turned up along the cut portion 91 (cut). According to the above configuration, no trim (the cut piece generated by cutting out a part of the main body 2) is generated during the manufacture of the pet diaper 1, so that the manufacture of the pet diaper 1 becomes easy.

[0103] In addition, at least one opening 9a may have a cut-out shape in which a part of the main body 2 is cut out. That is, the opening 9a may be formed by cutting out a part of the main body 2 having a predetermined area when viewed from the thickness direction Z. For example, the opening 9a may be formed by cutting out a part of the main body 2 corresponding to the region B shown in FIG. 2. That is, in the present embodiment, the cut portion 91 is provided in the main body 2 so that the opening 9a is formed along the cut portion 91 in the mounted state, but the opening 9a itself (the partially cut-out opening) may be provided in the main body 2. In this case, even if the opening 9a is deformed in the mounted state, it is difficult for the opening 9a to close. That is, by cutting out a part of the main body 2 to form the opening 9a, even if a part of the main body 2 including the opening 9a shrinks, the opening 9a can be maintained in an open state, and a highly breathable state can be preferably maintained.

[0104] The cut portion 91 forming the opening 9a has a curved shape. According to the above configuration, in the mounted state, the opening 9a can be easily opened. That is, a part of the main body 2 can be suitably turned up along the cut portion 91 extending in a curved shape.

[0105] Furthermore, as shown in FIGS. 1 and 2, the cutout portion 91 forming the opening 9a has a convex shape toward the outside in the width direction X. According to the above configuration, in the mounted state, the opening 9a can be easily opened and the air permeability can be effectively improved. For example, by arranging the cutout portion 91 between the tail insertion portion 6 and the elastic member 8 as in the present embodiment, as shown in FIG. 6, a configuration can be realized in which the opening 9a opens in an umbrella shape on the side surface portion of the back of the pet P. Thereby, air can pass from the lateral direction of the pet P to the gap S, and the air permeability is effectively improved.

[0106] The main body portion 2 is provided with a plurality of (in this embodiment, a total of eight, four on each side sandwiching the center line CL) cutout portions 91 provided independently of each other. According to the above configuration, as shown in FIG. 5, in the mounted state, a plurality of openings 9a corresponding to each of the plurality of cutout portions 91 can be formed. Thereby, compared with the case of forming one long opening, the risk of damage to the main body portion 2 due to snagging or the like can be reduced, and the overall opening area can be ensured to realize high air permeability.

[0107] As shown in FIGS. 1 and 2, at least one opening 9a is disposed on the back side of the absorbent core 11. In the present embodiment, since all the cutout portions 91 are disposed on the back side of the absorbent core 11, all the openings 9a are formed on the back side of the absorbent core 11. In the mounted state, the area on the back side of the absorbent core 11 is located on the back side (upper side) of the position facing the urine outlet of the pet (that is, the position overlapping the absorbent core 11). Therefore, by forming the ventilation opening 9a in the area on the back side of the absorbent core 11, the risk of urine leakage from the opening 9a can be reduced. In addition, the back portion of a pet such as a dog or a cat (that is, the portion of the main body portion 2 facing the portion on the back side of the absorbent core 11) is an area that is particularly prone to sweating because there are many hairs, but by providing the opening 9a at a position corresponding to such an area, the effect of improving the air permeability by the opening 9a can be enhanced.

[0108] As shown in FIGS. 1 and 2, at least one opening 9a is disposed dorsal to the tail insertion portion 6. That is, at least a part of the plurality of openings 9a (in this embodiment, among the three dorsal cut portions 91 excluding the ventral most cut portion 91 among the four cut portions 91 arranged in the longitudinal direction Y on each of both sides in the width direction X) includes a portion located dorsal to the tail insertion portion 6. According to the above configuration, as described above, the air permeability of the back portion of the pet, which is a particularly stuffy area, can be suitably improved.

[0109] As shown in FIG. 1, at least one opening 9a is disposed dorsal to the dorsal end R3a of both ends (end R2a and end R3a) of the leg side gather LSG. In this embodiment, since all the cut portions 91 are disposed dorsal to the end R3a, all the openings 9a are formed dorsal to the end R3a. According to the above configuration, as described above, the air permeability of the back portion of the pet, which is a particularly stuffy area, can be suitably improved.

[0110] As shown in FIG. 2, at least one opening 9a is disposed only ventral to the target portion 53 in the longitudinal direction Y. That is, the cut portions 91 corresponding to all the openings 9a are disposed ventral to the target portion 53 and do not overlap the target portion 53. According to the above configuration, since the ventilation opening 9a is formed so as not to overlap the target portion 53, it is possible to prevent the engagement strength between the fastening tab 50 (engagement portion 52) and the target portion 53 from being reduced due to the opening 9a.

[0111] As shown in FIGS. 1 and 2, at least one opening 9a is disposed outside the tail insertion portion 6 in the width direction X. In the present embodiment, since all the cut portions 91 are disposed outside the tail insertion portion 6 in the width direction X, all the openings 9a are formed outside the tail insertion portion 6 in the width direction X. According to the above configuration, by disposing the opening 9a at a position shifted outward in the width direction X from the tail insertion portion 6, in the mounted state, the region where the opening 9a is formed in the main body portion 2 can be curved along the body of the pet P (see FIG. 6). As a result, the opening 9a is more likely to open, so that the air permeability can be suitably improved.

[0112] As shown in FIG. 1, at least one opening 9a and the tail insertion portion 6 are provided in the third portion from the ventral side when the main body portion 2 is divided into four in the longitudinal direction Y. That is, when the crotch portion 23 is divided into a first portion 23A on the ventral side and a second portion 23B on the dorsal side, the cut portion 91 corresponding to at least one opening 9a is provided in the second portion 23B. In the present embodiment, among the four cut portions 91 arranged in the longitudinal direction Y, the entire two ventral cut portions 91 and a part of the third cut portion 91 from the ventral side are provided in the second portion 23B. According to the above configuration, since at least one opening 9a is formed in the portion corresponding to the back of the pet that is particularly likely to get stuffy in the mounted state (that is, the second portion 23B), the air permeability can be suitably improved.

[0113] As shown in FIGS. 1 and 4, at least one opening 9a is disposed at a position overlapping the side sheet 5. In the present embodiment, since all the cut portions 91 are disposed at positions overlapping the side sheet 5, all the openings 9a are formed at positions overlapping the side sheet 5. According to the above configuration, with respect to the opening 9a disposed at the position overlapping the side sheet 5, the rigidity of the portion (a part of the main body portion 2) where the opening 9a is formed increases by the amount of the side sheet 5, so that the opening 9a is more likely to open in the mounted state. As a result, the air permeability can be suitably improved.

[0114] As shown in Fig. 2, the distance d between the elastic member 8 and at least one opening 9a in the width direction X (here, as an example, the distance between the outer end of the cut portion 91 corresponding to the most ventral opening 9a in the width direction X and the elastic member 8) is smaller than the width of the opening 9a (i.e., the diameter of the smallest circle including the opening 9a (region B in this embodiment)). In other words, in the pet diaper 1, the opening 9a is formed at a position sufficiently close to the elastic member 8 with respect to the width of the opening 9a. In the worn state, the region where the elastic member 8 is provided is likely to be in close contact with the body of the pet P when the elastic member 8 contracts. According to the above configuration, by arranging the opening 9a at a position close to such a region (i.e., a position satisfying the above distance requirement), the opening 9a can be easily opened, and the air permeability can be preferably improved.

[0115] As shown in Fig. 2, at least one opening 9a is arranged inside the elastic member 8 in the width direction X. In this embodiment, since all the cut portions 91 are arranged inside the elastic member 8 in the width direction X, all the openings 9a are formed inside the elastic member 8 in the width direction X. In the worn state, the portion inside the elastic member 8 in the width direction X is likely to be in close contact with the body of the pet. According to the above configuration, by forming the opening 9a in such a region, the effect of improving the air permeability by the opening 9a can be enhanced.

[0116] [Modification Example] The embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above embodiments. The materials and shapes of each component can adopt various materials and shapes, not limited to the materials and shapes described above. Also, some components included in the configuration of the above-described embodiments may be changed or omitted, or other components may be added. Some modification examples will be described below.

[0117] [First Modification Example] At least one opening 9a may be formed so as to penetrate at least the leak - proof sheet 42 in the thickness direction Z. That is, the opening 9a may not penetrate the surface sheet 3 and the exterior sheet 41. For example, only the leak - proof sheet 42 may be provided with an opening having an opening area such as the area B in FIG. 2. The leak - proof sheet 42 disposed adjacent to the absorbent core 11 in the back sheet 4 is usually formed of a material with low air permeability (e.g., film) for leak prevention. According to the above configuration, by forming an opening so as to penetrate at least the leak - proof sheet 42, the air permeability in the worn state can be effectively improved.

[0118] (Second Modification Example) At least one opening 9a may be formed so as to penetrate at least the surface sheet 3 and the leak - proof sheet 42 in the thickness direction Z. The exterior sheet 41 made of non - woven fabric has a certain degree of air permeability. Therefore, by forming an opening (e.g., an opening having an opening area such as the area B in FIG. 2) that penetrates at least the surface sheet 3 and the leak - proof sheet 42, it is possible to ventilate the inner space (gap S) facing the surface sheet 3 and the outer space facing the back sheet 4 (exterior sheet 41) through the opening and the non - woven fabric (exterior sheet 41). As described above, the air permeability in the worn state can be effectively improved.

[0119] (Third Modification Example) In the first modification example and the second modification example, at least one opening 9a may be formed so as to penetrate the exterior sheet 41 in the thickness direction Z. Note that the opening 9a formed so as to penetrate the exterior sheet 41 in the second modification example is the same as the configuration of the present embodiment (i.e., the configuration in which the opening 9a is formed by the cut - out portion 91 that penetrates the entire main body portion 2). By forming the opening 9a so as to penetrate the exterior sheet 41 made of non - woven fabric, the air permeability in the worn state can be more effectively improved.

[0120] (Fourth Modification Example) FIG. 7 is a plan view of the pet diaper 1A according to the fourth modification example, as viewed from the non-skin side. As shown in FIG. 7, like the pet diaper 1A, at least one opening provided in the main body portion 2 may have an opening 91A (third opening) that penetrates the surface sheet 3 in the thickness direction Z and an opening 91B that penetrates the leak-proof sheet 42 in the thickness direction Z. The opening 91A does not penetrate the leak-proof sheet 42, and the opening 91B does not penetrate the surface sheet 3. The opening 91A and the opening 91B are arranged so as not to overlap in the thickness direction Z. In the example of FIG. 7, on both the left and right sides, among the four openings arranged in the longitudinal direction Y, the first and third openings from the ventral side are formed as the opening 91A, and the second and fourth openings from the ventral side are formed as the opening 91B. According to the configuration in which at least one (four in the example of FIG. 7) of the openings 91A and at least one (four in the example of FIG. 7) of the openings 91B are provided and these openings 91A and 91B are arranged so as not to overlap with each other, it is possible to improve the air permeability in the worn state by each of the openings 91A and 91B, and the material strength (thickness) can be appropriately maintained throughout the main body portion 2. That is, by configuring so that a thin portion (a portion where the material strength is particularly weak) where the opening 91A and the opening 91B overlap is not formed, the strength of the entire main body portion 2 can be ensured.

[0121] (Fifth Modification Example) FIG. 8 is a plan view of the pet diaper 1B according to the fifth modification as viewed from the non-skin side. As shown in FIG. 8, the pet diaper 1B is different from the pet diaper 1 in that two cut portions 91C, 91D, 91E, and 91F are provided in the main body portion 2 respectively. Further, the ventral end of the absorbent core 11 of the pet diaper 1B is located more dorsally than the ventral end of the absorbent core 11 of the pet diaper 1. In the example of FIG. 8, the ventral end of the absorbent core 11 is disposed at substantially the same position as the dorsal end of the flap portion F1 in the longitudinal direction Y. Further, a stretchable region C in which a plurality of stretchable members W extending in the width direction X are arranged is provided along the ventral end 2a of the main body portion 2. Each stretchable member W is provided so as to contract in the width direction X by being fixed to the main body portion 2 in a state of being stretched in the width direction X. Thereby, the portion of the main body portion 2 corresponding to the stretchable region C is provided so as to contract in the width direction X.

[0122] In the pet diaper 1B, at least one opening (the opening formed by the cut portion 91C) is disposed in at least one of the pair of flap portions F1. In the present embodiment, two cut portions 91C arranged symmetrically are provided in the left and right flap portions F1. As shown in FIG. 5, when the pair of fastening tabs 50 are pulled in the width direction X and engaged with the target portion 53 in the worn state, the flap portion F1 curves and comes into close contact with the body of the pet P. Therefore, since the opening (the opening formed by the cut portion 91C) disposed in such a flap portion F1 is likely to open in the worn state, the effect of improving the air permeability by the opening can be enhanced.

[0123] In the pet diaper 1B, at least one opening includes a first opening (an opening formed by the cut portion 91C on the left side in FIG. 8) disposed in one of the pair of flap portions F1 (the left flap portion F1 in FIG. 8), and a second opening (an opening formed by the cut portion 91C on the right side in FIG. 8) disposed in the other of the pair of flap portions F1 (the right flap portion F1 in FIG. 8). Further, in the region between the first opening and the second opening of the main body portion 2, the above-described stretchable region C (stretchable member W) is provided. According to the above configuration, in the worn state, when a force that causes the stretchable member W to contract in the width direction X acts, the openings (the first opening and the second opening) disposed in the flap portion F1 are more likely to open, so that the effect of improving the air permeability by the openings can be further enhanced.

[0124] In the pet diaper 1B, at least one opening (an opening formed by the cut portion 91D) is disposed between the pair of fastening tabs 50. In the example of FIG. 8, the two cut portions 91D are disposed at a position ventral to the absorbent core 11 (between the absorbent core 11 and the stretchable region C). In the worn state, when the pair of fastening tabs 50 are pulled in the width direction X and engaged with the target portion 53, the region between the pair of fastening tabs 50 (i.e., the portion where the opening formed by the cut portion 91D is provided) curves and closely adheres to the body of the pet. Therefore, the opening (the opening formed by the cut portion 91D) disposed in such a region is likely to open in the worn state, so that the effect of improving the air permeability by the opening can be enhanced.

[0125] In the pet diaper 1B, at least one opening (the opening formed by the cut portion 91E) is disposed at a position where the main body portion 2 and the base material (base material sheet 51) of the fastening tab 50 overlap. In the example of FIG. 8, each fastening tab 50 is provided with a cut portion 91E provided so as to overlap the base material sheet 51. According to the above configuration, an opening (the opening formed by the cut portion 91E) is formed in a thick portion where the main body portion 2 and the base material sheet 51 of the fastening tab 50 overlap, particularly in a portion where breathability is inhibited and it is likely to get stuffy, whereby the effect of improving breathability by the opening can be enhanced.

[0126] In the pet diaper 1B, at least one opening (the opening formed by the cut portion 91F) is disposed outside the width direction X from the standing fulcrum (end portion R1a) of the leg side gather LSG. In other words, when forming an opening in the region where the leg side gather LSG is formed in the longitudinal direction Y, the opening is formed while avoiding the region inside the width direction X from the standing fulcrum (end portion R1a) of the leg side gather LSG. According to the above configuration, since the opening (the opening formed by the cut portion 91F) is formed outside the fulcrum (end portion R1a) where the leg side gather LSG (standing portion 5a) that blocks excrement from the pet is formed, it is possible to prevent urine leakage caused by the opening and improve the breathability by the opening.

[0127] In addition, in the fifth modification, the pet diaper 1B including all of the above-described cut portions 91, 91C, 91D, 91E, and 91F has been described, but only a part of these cut portions may be provided in the pet diaper. Further, in this example, the cut portion (opening forming portion) is provided in the main body portion 2 so that an opening is formed in the mounted state. However, as described in the above embodiment, an opening itself may be formed in the main body portion 2 by cutting out a part of the main body portion 2.

[0128] (Sixth Modification Example) FIG. 9 is a diagram showing an example of the wearing state of the pet diaper 1C according to the sixth modification. As shown in FIG. 9, the pet diaper 1C may be a pet diaper (belly wrap type) that does not include a tail insertion portion 6. The pet diaper 1C has a substantially rectangular main body portion 2C having a longitudinal direction D1 (corresponding to the "width direction" in the above embodiment) in the body circumferential direction and a short transverse direction D2 (corresponding to the "front-rear direction" in the above embodiment) orthogonal to the longitudinal direction D1. That is, as shown in FIG. 9, the main body portion 2C is wound around the body circumference of the pet P so that the longitudinal direction D1 is along the body circumference of the pet P and is worn. As an example, a hook-and-loop tape 71 (fixing member) is provided near one end 2a of the ends 2a and 2b in the longitudinal direction D1 of the main body portion 2C. As an example, the hook-and-loop tape 71 is disposed on the non-skin side (the surface of the outer cover sheet 41) of the main body portion 2C. The hook-and-loop tape 71 is, for example, a mechanical fastener (surface fastener) and is engageable with the skin-side surface of the surface sheet 3.

[0129] As shown in FIG. 9, in the wearing state, the main body portion 2C is wound around the body circumference of the pet P so that the outer cover sheet 41 is on the outside and the end 2a is located at the upper center of the back of the pet P. In the pet diaper 1C, a rectangular absorber 10C is disposed at the central portion in the longitudinal direction D1 of the main body portion 2C (that is, the portion facing the urine outlet of the pet P in the wearing state). The absorber 10C includes an absorbent core similar to the absorbent core 11. As an example, an opening 91a is provided outside the longitudinal direction D1 from the region where the absorber 10C is disposed. In the example of FIG. 9, a plurality (two) of semi-circular openings 91a are arranged side by side in the short transverse direction D2 between each of the ends 2a and 2b of the main body portion 2C and the absorber 10C. Thus, even with the belly wrap type pet diaper 1C, since it is worn on the pet so as to cover the body circumference of the pet, the wearing displacement is appropriately suppressed. Further, by providing an opening 91a (or an opening forming portion such as a cut for forming such an opening 91a) at a position that does not overlap with the absorber 10C (absorbent core) of the main body portion 2C, the air permeability in the wearing state can be improved.

[0130] Referring to FIGS. 10 to 14, the belly wrap type pet diaper 1C will be described in more detail. FIG. 10 is a plan view of the pet diaper 1C seen from the skin side, and FIG. 11 is a plan view of the pet diaper 1C seen from the non-skin side. FIG. 12 is a cross-sectional view of the pet diaper 1C taken along line A-A in FIG. 10. FIG. 13 is a cross-sectional view of the pet diaper 1C taken along line B-B in FIG. 10. FIG. 14 is a cross-sectional view of the pet diaper 1C taken along line C-C in FIG. 10.

[0131] As shown in FIGS. 10 and 11, the main body portion 2C has a substantially rectangular (landscape-shaped) planar shape having a longitudinal direction D1 and a lateral direction D2. The main body portion 2C has a front edge 2Ca disposed on one end side in the lateral direction D2 and a rear edge 2Cb disposed on the other end side in the lateral direction D2. As shown in FIG. 9, when the pet diaper 1C is worn on the pet, the front edge 2Ca is disposed on the front leg side of the pet P, and the rear edge 2Cb is disposed on the rear leg side of the pet P. In the following description, the direction from the rear edge 2Cb toward the front edge 2Ca along the lateral direction D2 may be referred to as the front side, and the direction from the front edge 2Ca toward the rear edge 2Cb along the lateral direction D2 may be referred to as the rear side.

[0132] Similar to the main body portion 2, the main body portion 2C includes a surface sheet 3, a back sheet 4, and an absorber 10C disposed between the surface sheet 3 and the back sheet 4. The absorber 10C includes, for example, an absorbent core similar to the absorbent core 11 described above and a core wrap that covers the surface of the absorbent core. The core wrap is composed of, for example, a white plain tissue or non-woven fabric.

[0133] The main body portion 2C has a pair of leakage-preventing gathers 60 disposed outside the absorber 10 in the short-side direction D2. The pair of leakage-preventing gathers 60 suppresses leakage of urine excreted by a pet onto the absorber 10C in the short-side direction D2. The pair of leakage-preventing gathers 60 is disposed so as to cover both side portions of the surface sheet 3 in the short-side direction D2 from the skin side, and extends in the longitudinal direction D1 over the entire length of the main body portion 2C in the longitudinal direction D1. The pair of leakage-preventing gathers 60 includes a front-side leakage-preventing gather 61 provided along the front edge 2Ca and a rear-side leakage-preventing gather 62 provided along the rear edge 2Cb. In the following description, when there is no particular need for distinction, the front-side leakage-preventing gather 61 and the rear-side leakage-preventing gather 62 may be collectively referred to as the leakage-preventing gather 60.

[0134] As an example, the front-side leakage-preventing gather 61 includes a side sheet 611 partially fixed to the surface sheet 3 or the back sheet 4, and an elastic member 612 joined to the side sheet 611. The rear-side leakage-preventing gather 62 includes a side sheet 621 partially fixed to the surface sheet 3 or the back sheet 4, and an elastic member 622 joined to the side sheet 621. Each of the side sheets 611, 621 is made of a water-repellent or hydrophobic nonwoven fabric. For example, the side sheets 611, 621 are made of a spunlace nonwoven fabric, a spunbond nonwoven fabric, a thermal bond nonwoven fabric, a meltblown nonwoven fabric, an SMS nonwoven fabric, a needle-punched nonwoven fabric, an air-through nonwoven fabric, or the like. The elastic members 612, 622 are, for example, thread rubber.

[0135] Each of the side sheets 611 and 621 has a vertically long shape that is long in the longitudinal direction D1, and extends in the longitudinal direction D1 over the entire length of the main body portion 2C in the longitudinal direction D1. As shown in FIGS. 12 to 14, the pair of leak-proof gathers 60 extend outside the leak-proof sheet 42. More specifically, the outer edge of the front leak-proof gather 61 in the short direction D2 coincides with one outer edge of the exterior sheet 41 in the short direction D2, and together with one outer edge of the exterior sheet 41, constitutes the front edge 2Ca. The outer edge of the rear leak-proof gather 62 in the short direction D2 coincides with the other outer edge of the exterior sheet 41 in the short direction D2, and together with the other outer edge of the exterior sheet 41, constitutes the rear edge 2Cb.

[0136] As shown in FIG. 13, the side sheets 611 and 621 include a fixed portion A1 joined to the surface sheet 3 or the back sheet 4, and a standing portion A2 not joined to the surface sheet 3. The fixed portion A1 is joined to the surface sheet 3 or the back sheet 4 with, for example, a hot melt adhesive. The standing portion A2 is disposed inside the main body portion 2C rather than the fixed portion A1 in the short direction D2, and is capable of standing up starting from the inner edge A1a of the fixed portion A1.

[0137] As shown in FIGS. 12 and 14, both ends of the side sheet 611 of the front leak-proof gather 61 in the longitudinal direction D1 are joined to the surface sheet 3. More specifically, the side sheet 611 of the front leak-proof gather 61 is joined to the surface sheet 3 in a state of falling inward in the short direction D2 in the vicinity of the ends 2a and 2b. The portion excluding both ends of the inner edge 611a of the side sheet 611 in the longitudinal direction D1 is not joined to the surface sheet 3. Both ends (fixed ends) of the side sheet 611 in the longitudinal direction D1 serve as standing fulcrums of the side sheet 611 in the longitudinal direction D1. As described above, both ends of the side sheet 611 of the front leak-proof gather 61 in the longitudinal direction D1 are joined to the surface sheet 3 in a state of falling inward in the short direction D2, so that the side sheet 611 is in a state of falling inward in the short direction D2 when in the extended state.

[0138] On one hand, the inner edge 621a of the side sheet 621 of the rear leakage prevention gather 62 is not joined to the surface sheet 3 over the entire length in the longitudinal direction D1. Since the inner edge 621a of the side sheet 621 is not joined to the surface sheet 3 over the entire length in the longitudinal direction D1, as shown in FIGS. 10, 12, and 14, when in the extended state, the side sheet 621 falls outward in the short direction D2. When the side sheet 621 falls outward, the distance between the inner edges 611a and 621a of the pair of leakage prevention gathers 60 in the short direction D2 becomes longer, and the area for arranging the urethral orifice of the pet can be widened. Thereby, it becomes easier to attach the pet diaper 1C to an appropriate position, and urine leakage can be suppressed.

[0139] As shown in FIGS. 10 to 14, on both side edges of the main body part 2C in the short direction D2, a pair of elastic members 81 and 82 (waist circumference elastic members) that are fixed to the main body part 2C in the extended state and extend in the longitudinal direction D1 are provided. The elastic members 81 and 82 are, for example, thread rubber or the like. Further, at least one opening 91a is provided in the main body part 2C. As described above with reference to FIG. 9, in this modified example, a total of four semi-circular openings 91a, two on each side of the absorber 10C in the longitudinal direction D1, are provided.

[0140] As shown in FIG. 11, each opening 91a is provided in a region B1 within the range where the absorber 10C (including the absorbent core) is arranged in the short direction D2. The region B1 is a region within the range from the front end portion to the rear end portion of the absorber 10C. In the belly wrap type pet diaper 1C, such a region B1 becomes a region with relatively high rigidity due to the influence of the absorbent core (absorber 10). By providing the opening 91a in such a highly rigid region B1, the opening 91a can be easily widened in the worn state (see FIG. 9), so that the air permeability in the worn state can be effectively improved.

[0141] In the pet diaper 1C, as an example, all the openings 91a are arranged in the region B1. However, in order to obtain the above effects, at least one opening 91a may be arranged in the region B1. Further, for example, when the absorbent core (absorbent body 10C) has a constricted shape like the absorbent core 11 of the above embodiment, from the viewpoint of preferably obtaining the above effects, at least one opening 91a is within the range from the portion located most rearward among the front end edges of the absorbent core to the portion located most forward among the rear end edges of the absorbent core (that is, the range where the portion having the minimum width in the short side direction D2 of the absorbent core (the narrowest portion) is arranged). It is preferably provided in the region.

[0142] As shown in FIG. 11, the main body portion 2C is arranged on the first side S1 (the side where the end portion 2a is located with respect to the absorbent body 10) which is one of both sides of the absorbent core (absorbent body 10C) in the longitudinal direction D1, and is fixed to the portion of the second side S2 (the side where the end portion 2b is located with respect to the absorbent body 10) opposite to the first side S1 of the main body portion 2C in the worn state (see FIG. 9). Further, at least one opening 91a (in this modified example, all four openings 91a) is provided in the region B2 within the range where the hook tape 71 is arranged in the short side direction D2. The region B2 is the region within the range from the front end portion to the rear end portion of the hook tape 71. In the belly wrap type pet diaper 1C, such a region B2 becomes a region with relatively high rigidity due to the influence of the hook tape 71. By providing the opening 91a in such a highly rigid region B2, the opening 91a can be easily widened in the worn state (see FIG. 9), so that the air permeability in the worn state can be effectively improved.

[0143] In the pet diaper 1C, as an example, all the openings 91a are arranged in the region B2. However, in order to obtain the above effects, at least one opening 91a may be arranged in the region B2. Further, in the pet diaper 1C, the region B2 is included in the region B1. However, when the hook-and-loop tape 71 is formed wider in the lateral direction than the absorber 10C, the region B1 may be included in the region B2. Further, from the viewpoint of more preferably obtaining the above-described effects, at least one opening 91a is preferably provided in the region where the regions B1 and B2 overlap each other (in the example of FIG. 11, since the region B2 is included in the region B1, the region that coincides with the region B2).

[0144] As shown in FIG. 11, the portion of the second side S2 (the side where the end 2b is located with respect to the absorber 10) in the main body portion 2C has a non-opening region B3. The non-opening region B3 has no opening 91a provided therein and has a width w2 that is longer than the width w1 of the hook-and-loop tape 71 in the longitudinal direction D1. According to the above configuration, since it is possible to fix the hook-and-loop tape 71 to the non-opening region B3 (the skin-side surface of the surface sheet 3) so that the hook-and-loop tape 71 does not protrude from the non-opening region B3, the opening 91a that can be provided outside the non-opening region B3 in the portion of the second side S2 of the main body portion 2C (in this modified example, the two openings 91a provided between the end 2b and the absorber 10C) and the hook-and-loop tape 71 can be prevented from overlapping. Thereby, it is possible to prevent the fixing strength of the hook-and-loop tape 71 to the portion of the second side S2 of the main body portion 2C from decreasing due to the overlap of the opening 91a and the hook-and-loop tape 71, and it is possible to prevent the air permeability in the worn state realized by the opening 91a from being inhibited by the hook-and-loop tape 71.

[0145] As shown in FIG. 11, at least one opening 91a (in this modified example, two openings 91a) is provided in a portion of the second side S2 of the main body 2C. Here, the width w3 in the longitudinal direction D1 of the opening 91a provided in the portion of the second side S2 of the main body 2C may be made longer than the width w1 of the hook-and-loop tape 71. That is, the width dimensions of the opening 91a and the hook-and-loop tape 71 may be set so that "w3 > w1" holds. According to the above configuration, even when the hook-and-loop tape 71 is fixed to the portion of the second side S2 of the main body 2C such that the hook-and-loop tape 71 and the opening 91a overlap in the mounted state, it is guaranteed that the region where the hook-and-loop tape 71 and the portion of the second side S2 of the main body 2C are fixed is continuously formed over the entire area of the hook-and-loop tape 71 in the short-side direction D2. In other words, the portion where the hook-and-loop tape 71 and the main body 2C (the portion of the second side S2) engage with each other is not divided by the opening 91a in the short-side direction D2. Thereby, it is possible to prevent the fixing strength of the hook-and-loop tape 71 from being reduced by the opening 91a provided in the portion of the second side S2 of the main body 2C.

[0146] Alternatively, the width w3 of the opening 91a provided in the portion of the second side S2 of the main body 2C may be made shorter than the width w1 of the hook-and-loop tape 71. That is, the width dimensions of the opening 91a and the hook-and-loop tape 71 may be set so that "w3 < w1" holds. According to the above configuration, in the mounted state, it is possible to prevent the entire opening 91a provided in the portion of the second side S2 of the main body 2C from being covered by the hook-and-loop tape 71, so that it is possible to suppress the air permeability in the mounted state (that is, the air permeability realized by the above-described opening 91a formed in the portion of the second side S2 of the main body 2C) from being inhibited by the hook-and-loop tape 71.

[0147] As shown in FIG. 11, at least one opening 91a (two openings 91a in this modified example) is provided in region B4 between the absorber 10C (absorbent core) and the hook tape 71 in the portion of the first side S1 of the main body 2C. According to the above configuration, at least one opening 91a is formed in a region that faces the side portion on the dorsal side of the pet in the worn state and where the number of overlapping sheet materials tends to be large (that is, a portion that is particularly prone to sweating because it easily overlaps with the portion of the second side S2 of the main body), so that the air permeability can be suitably improved.

[0148] As shown in FIG. 11, at least one opening 91a (all four openings 91a in this modified example) is provided in the region within the range where the main body 2C expands and contracts by the expansion and contraction members 81 and 82 in the longitudinal direction D1. According to the above configuration, in the worn state, the opening 91a provided in the main body 2C can be appropriately separated (released) from the pet's body by the expansion and contraction of the expansion and contraction members 81 and 82, so that the air permeability can be further improved.

[0149] In this modified example, since the expansion and contraction members 81 and 82 extend from one end 2a to the other end 2b of the main body 2C, the region within the above range coincides with the entire region of the main body 2C. However, the main body may be formed, for example, in a shape where both side portions in the short transverse direction D2 of each of the ends 2a and 2b of the main body 2C are cut out. In such a case, both ends of the expansion and contraction members 81 and 82 in the longitudinal direction D1 are located inside the longitudinal direction D1 from the ends 2a and 2b at the center of the short transverse direction D2 of the main body 2C. The above configuration (that is, the configuration in which at least one opening 91a is provided in the region within the range where the main body 2C expands and contracts by the expansion and contraction members 81 and 82) is particularly effective when the ends 2a and 2b do not coincide with both ends of the expansion and contraction members 81 and 82 in the longitudinal direction D1 in this way.

[0150] As described above, the diaper 1C for pets, which is an example of the belly wrap type, has been explained. However, the mode of the belly wrap type diaper for pets is not limited to the mode of the diaper 1C for pets. For example, in the diaper 1C for pets, the openings 91a are provided on each of both sides of the absorber 10C in the short side direction D2. However, at least one opening 91a may be provided only on one side (the first side S1 or the second side S2) of the absorber 10C in the short side direction D2. Further, in the diaper 1C for pets, the hook tape 71 is provided on the surface (outer surface) of the outer wrapper sheet 41. However, the hook tape 71 may be provided on the surface (skin side surface) of the top sheet 3. Further, at least one opening 91a may be provided at a position overlapping with the hook tape 71 (fixing member). In this case, the opening 91a may be provided so as to penetrate the hook tape 71. Further, in the diaper 1C for pets, the hook tape 71 is provided as an example of the fixing member. However, the fixing member provided in the diaper 1C for pets may be a loop member that engages with a hook-shaped member. Further, in the main body portion 2C, instead of the opening 91a, an opening forming portion such as the cut portion 91 of the above-described embodiment may be provided.

[0151] (Other modification examples or supplementary matters) The respective configurations of the above-described embodiment and several modification examples (the first to the sixth modification examples) may be arbitrarily combined.

[0152] Further, in the above-described embodiment and the first to the sixth modification examples, in the region of the main body portion that overlaps with the absorbent core, an opening similar to the opening 9a or an opening forming portion similar to the cut portion 91 (opening forming portion) is not arranged. According to the above configuration, by not arranging any ventilation openings (or opening forming portions that form the openings) in the region of the main body portion that overlaps with the absorbent core, it is possible to surely prevent the absorption performance of the diaper for pets from being inhibited by the openings.

[0153] In addition, in the above-described embodiment and the first to fifth modified examples, the tail insertion portion 6 is provided on the dorsal side of the dorsal end portion of the absorber 10, but the tail insertion portion 6 may be provided on the ventral side of the dorsal end portion of the absorber 10. In this case, the absorber 10 may be formed so as to surround the region where the tail insertion portion 6 is provided when viewed in the thickness direction Z. In other words, when viewed in the thickness direction Z, an opening region corresponding to the region where the tail insertion portion 6 is provided may be formed in the absorber 10.

Explanation of Reference Numerals

[0154] 1, 1A, 1B, 1C... pet diapers, 2, 2C... main body portions, 3... front sheet, 4... back sheet, 5... side sheet, 6... tail insertion portion, 8... elastic member (leg expansion / contraction member), 9a, 91A, 91B, 91a... openings, 11... absorbent core, 41... outer packaging sheet (outer sheet), 42... leak-proof sheet (inner sheet), 50... fastening tab, 53... target portion, 71... hook-and-loop tape (fixing member), 81, 82... expansion / contraction member (waist circumference expansion / contraction member), 91, 91C, 91D, 91E, 91F... cut portion (opening forming portion), F1... flap portion (protruding portion), LSG... leg side gather, R1a... end portion (standing fulcrum), W... expansion / contraction member.

Claims

1. A pet diaper to be worn by a pet so as to cover at least the pet's torso, The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, The main body is provided with a tail insertion portion for inserting the tail of the pet, A pet diaper, wherein the at least one opening has a shape or size different from that of the tail insertion portion.

2. The pet diaper according to claim 1 , wherein the size of the at least one opening is smaller than the size of an opening formed in the tail insertion portion.

3. The at least one opening has a cutout shape obtained by cutting out a part of the main body. The pet diaper according to claim 1.

4. The at least one opening is formed by a cut. The pet diaper according to claim 1.

5. The incision has a curved shape. The pet diaper according to claim 4.

6. The cut has a convex shape toward the outside in the width direction. The pet diaper according to claim 4 or 5.

7. The main body portion is provided with a plurality of the cuts provided independently of each other. The pet diaper according to claim 4.

8. The at least one opening is disposed on the rear side of the absorbent core. The pet diaper according to claim 1.

9. The main body is provided with a tail insertion portion for inserting the tail of the pet, The at least one opening is disposed dorsally relative to the tail insertion portion. The pet diaper according to claim 8.

10. the main body portion has side sheets that form leg side gathers that are configured to be able to stand up by fixing both ends in the front-rear direction and contracting a portion between the both ends in the front-rear direction, The opening is disposed on the back side of the back end of each of the both ends of the leg side gathers. The pet diaper according to claim 8.

11. a pair of fastening tabs extending outward in the width direction from both ends of the main body in the width direction; A target portion is disposed in a region of the main body portion that is rearward of the pair of fastening tabs and engages with the pair of fastening tabs in the attached state, The at least one opening is disposed only on the ventral side of the target portion in the front-rear direction. The pet diaper according to claim 8.

12. A pet diaper to be worn by a pet so as to cover at least the pet's torso, The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, a pair of fastening tabs extending outward in the width direction from both ends of the main body in the width direction; A target portion is disposed in a region of the main body portion that is rearward of the pair of fastening tabs and engages with the pair of fastening tabs in the attached state, the pair of fastening tabs are provided on a pair of protruding portions each extending outward in the width direction from a region of the main body portion in which the absorbent core is disposed, A pet diaper, wherein the at least one opening is disposed in at least one of the pair of protrusions.

13. The at least one opening includes a first opening disposed on one of the pair of protrusions and a second opening disposed on the other of the pair of protrusions, An elastic member is provided in a region between the first opening and the second opening of the main body portion, the elastic member being fixed to the main body portion in a state in which the elastic member is stretched in the width direction and extending in the width direction. The pet diaper of claim 12.

14. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, a pair of fastening tabs extending outward in the width direction from both ends of the main body in the width direction; A target portion is disposed in a region of the main body portion that is rearward of the pair of fastening tabs and engages with the pair of fastening tabs in the attached state, the pair of fastening tabs are provided on a pair of protruding portions each extending outward in the width direction from a region of the main body portion in which the absorbent core is disposed, A pet diaper, wherein the at least one opening is disposed between the pair of fastening tabs.

15. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, a pair of fastening tabs extending outward in the width direction from both ends of the main body in the width direction; A target portion is disposed in a region of the main body portion that is rearward of the pair of fastening tabs and engages with the pair of fastening tabs in the attached state, A pet diaper, wherein the at least one opening is positioned at a position where the main body portion and the base material of the fastening tab overlap.

16. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, the main body portion has side sheets that form leg side gathers that are configured to be able to stand up by fixing both ends in the front-rear direction and contracting a portion between the both ends in the front-rear direction, The opening is disposed outward in the width direction from the standing fulcrum of the leg side gather.

17. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, The main body is provided with a tail insertion portion for inserting the tail of the pet, The opening is disposed outside the tail insertion portion in the width direction.

18. The at least one opening and the tail insertion portion are provided in a third portion from the ventral side when the main body is divided into four portions in the front-rear direction.

18. The pet diaper of claim 17.

19. the main body portion has side sheets that form leg side gathers that are configured to be able to stand up by fixing both ends in the front-rear direction and contracting a portion between the both ends in the front-rear direction, The at least one opening is disposed at a position overlapping the side sheet.

18. The pet diaper of claim 17.

20. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, A leg stretch member is provided along an outer edge of the body portion in the width direction, and is fixed to the body portion in a state in which the leg stretch member is stretched in the front-rear direction and extends in the front-rear direction. A pet diaper, wherein a distance between the leg stretch member and the at least one opening in the width direction is smaller than a diameter of a smallest circle including the at least one opening.

21. A leg stretch member is provided along an outer edge of the body portion in the width direction, and is fixed to the body portion in a state in which the leg stretch member is stretched in the front-rear direction and extends in the front-rear direction. The at least one opening is disposed on the inner side of the leg stretch member in the width direction. The pet diaper according to claim 1.

22. The back sheet is An outer sheet made of a nonwoven fabric constituting the outermost surface of the main body; an inner sheet disposed between the outer sheet and the absorbent core, The at least one opening penetrates at least the inner sheet in a thickness direction of the main body portion perpendicular to the width direction and the front-rear direction. The pet diaper according to claim 1.

23. The back sheet is An outer sheet made of a nonwoven fabric constituting the outermost surface of the main body; an inner sheet disposed between the outer sheet and the absorbent core, The at least one opening penetrates at least the top sheet and the inner sheet in the thickness direction.

23. The pet diaper of claim 22.

24. The opening extends through the outer sheet in the thickness direction.

24. The pet diaper according to claim 22 or 23.

25. The back sheet is An outer sheet made of a nonwoven fabric constituting the outermost surface of the main body; an inner sheet disposed between the outer sheet and the absorbent core, The at least one opening includes a third opening penetrating the top sheet in a thickness direction of the main body portion perpendicular to the width direction and the front-rear direction, and a fourth opening penetrating the inner sheet in the thickness direction, The third opening and the fourth opening are arranged so as not to overlap with each other in the thickness direction. The pet diaper according to claim 1.

26. A pet diaper to be worn by a pet so as to cover at least the pet's torso, comprising: The pet diaper has a main body portion having a width direction along the pet's waist circumference direction and a front-rear direction perpendicular to the width direction when the pet diaper is worn on the pet, The main body portion is A top sheet that is placed in a position facing the pet's skin in the attached state; 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, At least one opening, through which the tail of the pet cannot be inserted in the worn state and which improves the breathability of an internal space facing the top sheet, or at least one opening forming portion for forming the at least one opening is provided in a position in the main body portion that does not overlap with the absorbent core, The main body portion has a horizontally elongated shape having a longitudinal direction and a transverse direction, and is worn by being wrapped around the pet's waist so that the longitudinal direction follows the pet's waist.

27. The pet diaper according to claim 26, wherein the at least one opening or the at least one opening forming portion is provided in an area in the short side direction in which the absorbent core is disposed.

28. the main body portion is disposed on a first side, which is one of both sides of the absorbent core in the longitudinal direction, and has a fixing member that is fixed to a portion of the main body portion on a second side opposite to the first side in the attached state; The pet diaper according to claim 26, wherein the at least one opening or the at least one opening forming portion is provided in an area in the short side direction in which the fixing member is arranged.

29. A pet diaper as described in claim 28, wherein the second side portion of the main body portion does not have the at least one opening or the at least one opening forming portion, and has a non-opening area having a width longer than the width of the fixing member in the longitudinal direction.

30. the at least one opening or the at least one opening forming portion is provided in the second side portion of the main body portion, The pet diaper according to claim 28, wherein the longitudinal width of the at least one opening or the at least one opening forming portion provided in the second side portion is longer than the longitudinal width of the fixing member.

31. the at least one opening or the at least one opening forming portion is provided in the second side portion of the main body portion, The pet diaper according to claim 28, wherein the longitudinal width of the at least one opening or the at least one opening forming portion provided in the second side portion is shorter than the longitudinal width of the fixing member.

32. the main body portion is disposed on a first side, which is one of both sides of the absorbent core in the longitudinal direction, and has a fixing member that is fixed to a portion of the main body portion on a second side opposite to the first side in the attached state; The pet diaper according to claim 26, wherein the at least one opening or the at least one opening forming portion is provided in an area between the absorbent core and the fixing member in the first side portion of the main body portion.

33. The waist stretchable member is fixed to the main body portion in a state stretched in the longitudinal direction and extends in the longitudinal direction along both side edges of the main body portion in the short direction. The pet diaper according to claim 26, wherein the at least one opening or the at least one opening forming portion is provided in an area within a range in which the main body portion stretches in the longitudinal direction due to the waist-edge stretchable member.

34. The pet diaper according to claim 1 , wherein no openings similar to the at least one opening or opening forming portions similar to the at least one opening forming portion are arranged in the area of ​​the main body portion overlapping with the absorbent core.

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