Pet diaper

Abstract

A pet diaper (1) includes a main body portion (2) having a first sheet (31) formed of a nonwoven fabric arranged in a position facing a pet's skin in a wearing state, a back sheet (4), and an absorbent core (11). The back sheet (4) includes an outer sheet (41) formed of a nonwoven fabric constituting an outermost surface of the main body portion (2), and a leakage prevention sheet (42) arranged between the outer sheet (41) and the absorbent core (11). A tail passage portion (6) is provided in the main body portion (2). The tail passage portion (6) includes a cut portion (6a) formed by cutting the main body portion (2) in a thickness direction (Z), and a cut portion (6b) provided separately from the cut portion (6a). At least one opening portion (31a), (41a) is provided in at least one of the first sheet (31) and the outer sheet (41) at a boundary region (B) between the cut portion (6a) and the cut portion (6b) of the main body portion (2).

Description

Technical Field

[0001] This invention relates to diapers for pets. Background Technology

[0002] Pet diapers worn on pets such as dogs and cats are known in the past. For example, Patent Document 1 discloses a pet diaper with a tail-passing portion (cut) for the pet's tail to pass through in a part closer to the back than the absorbent core. In the pet diaper disclosed in Patent Document 1, the tail-passing portion is configured by multiple cuts (cuts) arranged separately from each other to allow for adjustment of the size of the tail-passing hole.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-205542 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] As disclosed in Patent Document 1 above, when a tail-through portion that can be adjusted in size is formed by multiple cuts, it may be necessary to tear the portion (boundary portion) between the multiple cuts in the body of the pet diaper in order to connect the multiple cuts to form a tail-through hole of a predetermined size. When strong force is required to perform such tearing, not only is the convenience of the user performing the tearing impaired, but there is also a concern that the body may be torn in a direction different from the originally intended tearing direction.

[0008] Therefore, one aspect of the present invention aims to provide a pet diaper configured to connect multiple cut portions to form a tail through hole of a predetermined size, the pet diaper being easily and accurately torn for connecting the multiple cut portions.

[0009] Solution for solving the problem

[0010] One aspect of the present invention provides a pet diaper that can be worn on a pet and includes a body portion comprising: a surface sheet formed of nonwoven fabric, which is positioned facing the pet's skin when the pet diaper is worn on the pet; a back sheet positioned on the side opposite to the pet's skin when worn; and an absorbent core disposed between the surface sheet and the back sheet. The back sheet has an outer sheet formed of nonwoven fabric, which constitutes part of the body portion. The outermost surface; and the inner sheet disposed between the outer sheet and the absorbent core, the body portion having a tail-passing portion for the pet's tail to pass through, the tail-passing portion having a first cutting portion formed by cutting the body portion along the thickness direction which is the stacking direction of the sheet constituting the body portion and a second cutting portion disposed above the ground from the first cutting portion, at least one opening having a predetermined area through the thickness direction is provided in at least one of the surface sheet and the outer sheet in the boundary region between the first cutting portion and the second cutting portion of the body portion.

[0011] The effects of the invention

[0012] According to the present invention, a pet diaper is provided that is configured to connect a plurality of cut portions to form a tail through hole of a predetermined size, wherein tearing of the plurality of cut portions can be performed easily and with good precision. Attached Figure Description

[0013] Figure 1 This is a top view of one embodiment of a pet diaper, viewed from the side of the skin.

[0014] Figure 2 Viewed from the non-skin side Figure 1 A top view of pet diapers.

[0015] Figure 3 It is along Figure 1 A cross-sectional view of a pet diaper along line III-III.

[0016] Figure 4 It is along Figure 1 A cross-sectional view of a pet diaper with IV-IV lines.

[0017] Figure 5 This is an example of how a pet wears a diaper.

[0018] Figure 6 This is a magnified view of the first thin slice from the side of the skin.

[0019] Figure 7 This is a magnified view of the outer casing from a non-skin-side perspective.

[0020] Figure 8 This is an enlarged view of the boundary region containing the main body, viewed from the side of the skin.

[0021] Figure 9 This is a diagram illustrating an example of a hot melt adhesive applied to the first sheet and the outer sheet.

[0022] Figure 10 An enlarged view of the boundary region of the body containing the modified example, viewed from the skin side. Detailed Implementation

[0023] Based on the description in this specification and the accompanying drawings, at least the following methods 1 to 10 can be identified.

[0024] (Method 1)

[0025] A pet diaper that can be worn on a pet, and having a body portion having:

[0026] A surface sheet, formed of nonwoven fabric, is positioned facing the pet's skin when the pet diaper is worn on the pet.

[0027] A back panel, in the worn state, is positioned on the side opposite to the pet's skin; and

[0028] An absorbent core is disposed between the surface sheet and the back sheet.

[0029] The back sheet has:

[0030] An outer sheet, formed of nonwoven fabric, constitutes the outermost surface of the body portion; and

[0031] An inner sheet is disposed between the outer sheet and the absorbent core.

[0032] The main body is provided with a tail-passing part for the pet's tail to pass through.

[0033] The tail-through portion has a first cutting portion formed by cutting the body portion along the thickness direction, which is the stacking direction of the sheets constituting the body portion, and a second cutting portion disposed above the ground from the first cutting portion.

[0034] In the boundary region between the first cut-off portion and the second cut-off portion of the body portion, at least one opening with a predetermined area is provided on at least one of the surface sheet and the outer sheet, extending through the thickness direction.

[0035] In the aforementioned pet diaper, the tail-passing portion has a first cut-out portion and a second cut-out portion that are separated from each other. That is, by connecting the first cut-out portion and the second cut-out portion, a tail-passing hole of a predetermined size is formed. Furthermore, in the boundary region between the first cut-out portion and the second cut-out portion, an opening is provided on at least one of the surface sheet and the outer sheet constituting the main body portion. By providing such an opening in the boundary region, the portion corresponding to the boundary region of the main body portion can be easily torn. Moreover, the fact that the portion corresponding to the boundary region of the main body portion can be easily torn results in the user preventing the main body portion from being torn in an unexpected direction when tearing this portion to connect the first cut-out portion and the second cut-out portion while using the pet diaper. Therefore, according to the aforementioned pet diaper, tearing for connecting multiple cut-out portions can be performed easily and with good precision.

[0036] (Method 2)

[0037] According to method 1, the width of the opening is smaller than the shortest distance between the first cut and the second cut.

[0038] According to method 2, in the state before the use of pet diapers, to prevent the first cut portion and the second cut portion from being connected through the opening, the state in which the first cut portion and the second cut portion are separated can be appropriately maintained.

[0039] (Method 3)

[0040] According to method 2, the width of the opening is less than 1 / 2 of the shortest distance.

[0041] According to method 3, in the state before the use of pet diapers, the separation of the first cut portion and the second cut portion can be maintained more appropriately, and the accidental tearing of the portion corresponding to the boundary area of ​​the main body (the portion between the first cut portion and the second cut portion) can be suppressed.

[0042] (Method 4)

[0043] According to method 3, the shortest distance is between 3mm and 5mm.

[0044] By setting the shortest distance between the first cutting portion and the second cutting portion to 3 mm or more, the accidental tearing of the portion corresponding to the boundary area of ​​the main body can be effectively suppressed. Furthermore, by controlling the aforementioned shortest distance to 5 mm or less, the difficulty in tearing the portion corresponding to the boundary area of ​​the main body can be suppressed.

[0045] (Method 5)

[0046] According to any one of methods 1 to 4, the pet diaper includes at least one opening comprising a plurality of openings arranged in a regular pattern.

[0047] The width of the linear hot melt adhesive bonded to the region containing the tail through portion of at least one of the surface sheet and the outer sheet having the plurality of openings is greater than the width of the opening and smaller than the distance between the centers of two adjacent openings.

[0048] According to method 5, interlayer peeling of the body portion in the tail-through section can be appropriately suppressed, and the seepage of hot melt adhesive from the opening can be prevented.

[0049] (Method 6)

[0050] According to any one of the methods 1 to 5, the moisture permeability of the inner sheet is 500 g / (m²). 2 24h) or more.

[0051] (Method 7)

[0052] According to any of the methods 1 to 6, a pet diaper is provided in which a plurality of micropores are formed on the inner sheet.

[0053] According to method 6 or 7, the inner sheet can be easily torn. As a result, the tearing process of the portion corresponding to the boundary area of ​​the main body can be further facilitated.

[0054] (Method 8)

[0055] According to any one of the methods 1 to 7, in the boundary region, at least one first opening is provided on the surface sheet, which extends through the thickness direction and has a predetermined area, and at least one second opening is provided on the outer sheet, which extends through the thickness direction and has a predetermined area.

[0056] According to method 8, by providing openings on both sides of the surface sheet and the outer sheet in the boundary region, it is easier to tear the part corresponding to the boundary region of the body part.

[0057] (Method 9)

[0058] As in the pet diaper of method 8, wherein, in the boundary region, the at least one first opening and the at least one second opening have portions that overlap each other in the thickness direction.

[0059] According to method 9, because the material strength (thickness) of the body portion can be reduced in the area where the first opening and the second opening overlap, this portion is easier to tear. As a result, tearing the portion corresponding to the boundary area of ​​the body portion can be further facilitated.

[0060] (Method 10)

[0061] As in the pet diaper of method 8, in the boundary region, the first opening and the second opening do not have overlapping portions in the thickness direction.

[0062] According to method 10, by not forming a portion where the first opening and the second opening overlap (i.e., a portion where the material strength (thickness) of the body portion is particularly small) in the boundary region, it is possible to suppress the portion corresponding to the boundary region of the body portion from being too easily torn, or even to the point where the portion corresponding to the boundary region is accidentally torn.

[0063] [Implementation Method]

[0064] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the following description, the same reference numerals are used for the same or equivalent elements, and repeated descriptions are omitted.

[0065] Reference Figures 1-4 The overall structure of the pet diaper 1 according to one embodiment will be described. Figure 1 This is a top view of pet diaper 1 from the skin side. Figure 2 This is a top view of the pet diaper 1 from the non-skin side. Figure 1 and Figure 2 This refers to the pet diaper 1 in its stretched state, where it is stretched until no wrinkles are formed. Figure 3 For along Figure 1 A cross-sectional view of pet diapers 1 along line III-III. Figure 4 For along Figure 1 A cross-sectional view of pet diaper 1 with IV-IV lines. Figure 1 and Figure 2 The illustrations of openings 31a and 41a, which will be described later, are omitted. The pet diaper 1 is a diaper worn on a pet. In this specification, "pet" broadly includes vertebrates and invertebrates, typically including dogs, cats, rabbits, hamsters, etc. As an example, the pet diaper 1 is a dog diaper.

[0066] In this embodiment, the "skin side" is the side facing the pet's skin when the pet diaper 1 is worn on the pet. The "non-skin side" is the side facing away from the pet's skin when worn. Figure 1As shown, the pet diaper 1 has: a length direction Y connecting the pet's abdomen to its back, a width direction X orthogonal to the length direction Y and disposed along the pet's waistline, and a thickness direction Z orthogonal to both the length direction Y and the width direction X. Figure 3 As shown, the thickness direction Z is the stacking direction of the various materials constituting the pet diaper 1 (the first sheet 31, the second sheet 32, the back sheet 4, the absorbent body 10, etc., described later). A straight line passing through the center of the width direction X of the pet diaper 1 and parallel to the length direction Y is referred to as the "center line CL".

[0067] The pet diaper 1 has a body portion 2 extending along the length direction Y and the width direction X. The body portion 2 absorbs urine excreted by the pet after wearing the pet diaper 1. The body portion 2 is divided into a ventral portion 21 located on the ventral side of the pet when worn, a dorsal portion 22 located on the dorsal side of the pet when worn, 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 length direction Y from the ventral side (front) of the pet toward the dorsal side (rear). For example, when the body portion 2 is divided into 4 equal parts along the length direction Y, the area of ​​the part closest to the ventral side corresponds to the ventral portion 21, the area of ​​the part closest to the dorsal side corresponds to the dorsal portion 22, and the areas of the two parts located between the ventral portion 21 and the dorsal portion 22 (i.e., the central part of the body portion 2 in the length direction Y) correspond to the crotch portion 23.

[0068] The main body 2 has: a first sheet 31 (surface sheet), a second sheet 32, a back sheet 4, a pair of side sheets 5, and an absorber 10.

[0069] The first sheet 31 is a sheet of nonwoven fabric disposed in the position facing the pet's skin when worn. Examples of the first sheet 31 include: hot-air nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, dot-bonded nonwoven fabric, needle-punched nonwoven fabric, spunlace nonwoven fabric, etc. In this embodiment, the first sheet 31 is made of hot-air nonwoven fabric. Examples of the fiber material of the first sheet 31 include rayon, cellulose acetate, cotton, pulp, synthetic fibers, etc. In this embodiment, as one example, the first sheet 31 in an elongated state ( Figure 1 The first sheet 31 is positioned between the tops of the side sheets 5 on both sides, forming a rectangle extending along the length direction Y from the ventral end 2a to the dorsal end 2b of the main body 2. The center of the first sheet 31 in the width direction X is located on the center line CL. However, the shape of the first sheet 31 and the area where the first sheet 31 is positioned are not limited to this embodiment. The first sheet 31 may also be provided at least in the portion including the boundary region B described later. The first sheet 31 is bonded to the second sheet 32 ​​by a hot melt adhesive (HMA).

[0070] The second sheet 32 ​​is a liquid-permeable sheet disposed between the first sheet 31 and the absorber 10. The second sheet 32 ​​can, for example, be made of the same nonwoven fabric as the first sheet 31. The second sheet 32 ​​is wider than the first sheet 31 and can also be disposed at a position overlapping with a pair of side sheets 5.

[0071] The back sheet 4 is a liquid-impermeable sheet disposed on the side opposite to the pet's skin when worn. The back sheet 4 can be formed, for example, of a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet thereof. In this embodiment, the back sheet 4 has an outer sheet 41 (outer sheet) and a leak-proof sheet 42 (inner sheet). The outer sheet 41 is disposed further outward (on the non-skin side) than the leak-proof sheet 42, forming the outermost surface of the body portion 2. The outer sheet 41 is formed, for example, of a liquid-impermeable nonwoven fabric. The leak-proof sheet 42 is disposed between the outer sheet 41 and the absorbent core 10 (absorbent core 11), and is bonded to the outer sheet 41. More specifically, the outer sheet 41 is bonded to the leak-proof sheet 42 using a hot melt adhesive (HMA). The leak-proof sheet 42 is formed, for example, of a liquid-impermeable synthetic resin film.

[0072] A pair of side panels 5 form leg-side pleats (LSG) on the ventral side 21 and crotch area 23, serving as upright, leak-proof pleats. The side panels 5 can be formed from, for example, a nonwoven fabric with water-repellent or hydrophobic properties. Figure 1 , Figure 3 and Figure 4 As shown, the side sheets 5 are arranged on both sides of the body portion 2 in the width direction X, exposing the first sheet 31. Each side sheet 5 extends along the length direction Y from the ventral end 2a of the body portion 2 to the dorsal end 2b of the body portion 2. Figure 3 and Figure 4 As shown, the outer edges of each side sheet 5 in the width direction X coincide with the outer edge of the back sheet 4, forming the outer edge portion 2c of the body portion 2. Furthermore, the inner portion of each side sheet 5 in the width direction X is folded towards the non-skin side. An elastic member 7, extending in the length direction Y from the folded side sheets 5 across the ventral portion 21 to the crotch portion 23, is disposed between them. The elastic member 7 is, for example, a threaded rubber.

[0073] like Figure 1As shown, each side sheet 5 is joined (fixed) to the second sheet 32 ​​in a fixing part R surrounded by a single-dotted line and shaded with diagonal lines. Each fixing part R is disposed over the entire area of ​​the 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 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.

[0074] The erected portion 5a is formed by the portion between the inner end R2a of the fixing portion R2 in the length direction Y and the inner end R3a of the fixing portion R3 in the length direction Y (i.e., the portion in the side sheet 5 where the elastic member 7 is disposed and is not joined to the second sheet 32). The erected portion 5a is erected by the contraction of the elastic member 7, thereby functioning as the part of the leg-side ruffle LSG. More specifically, the erected portion 5a is fixed by the fixing portions R2 and R3 at both ends in the length direction Y and contracts in the length direction Y, thereby forming an erection with the inner end R1a of the fixing portion R1 in the width direction X as the fulcrum. That is, the end R1a of the fixing portion R1 functions as the erection fulcrum of the leg-side ruffle LSG.

[0075] The absorber 10 is disposed between the first sheet 31 and the back sheet 4 (in this embodiment, between the second sheet 32 ​​and the leak-proof sheet 42). Figure 3 As shown, the absorbent 10 is formed of an absorbent core 11 and a core-cladding layer 12 covering the upper and lower surfaces of the absorbent core 11. The absorbent core 11 is positioned to reach the ventral portion 21 and the crotch portion 23, but not to the dorsal portion 22. The absorbent core 11 is a component for absorbing pet urine and has liquid absorbency and liquid retention properties. The absorbent core 11 is, for example, a laminate of absorbent material such as pulverized pulp or superabsorbent polymer (SAP), or a mixture thereof. The core-cladding layer 12 is, for example, a thin paper or a nonwoven sheet. As an example, the absorbent core 11 is formed in a gourd shape (or hourglass shape) when viewed in the thickness direction Z, and the central portion of the absorbent core 11 in the length direction Y has a narrowed shape.

[0076] like Figure 1 and Figure 2As shown, the main body 2 is provided with a tail-passing portion 6 for the pet's tail to pass through. In one example, the tail-passing portion 6 is constructed by a single cut-off portion 6a (first cut-off portion) and two cut-off portions 6b (second cut-off portions) separated from the cut-off portion 6a. The cut-off portions 6a and 6b are formed by cutting through the main body 2 along the thickness direction Z, and penetrate the main body 2 along the thickness direction Z. The cut-off portion 6a is located at the center of the region of the absorbent core 11 on the back side of the lower crotch portion 23 in the width direction X. The cut-off portion 6a is formed as a curved surface (arc shape) extending in the width direction X along the center line CL and forming a convex shape towards the back side. The two cut-off portions 6b are located on both sides of the cut-off portion 6a on the back side and close to the cut-off portion 6a. The two cut-off portions 6b are formed in a straight line shape inclined relative to the length direction Y, such that the interval between the two cut-off portions 6b increases as they move from the ventral side towards the back side.

[0077] By pressing the portion of the cut portion 6a between each other in the width direction X, and specifically the portion closer to the ventral side of the cut portion 6a, toward the non-skin side, a roughly semi-circular opening for the pet's tail to pass through is formed. Furthermore, by breaking the portion between the cut portion 6a and the two cut portions 6b in the main body 2, the cut portion 6a and the two cut portions 6b can be connected. At this time, as... Figure 2 As shown, an opening with a larger area A than the opening formed by the cutting portion 6a can be formed. Thus, in this embodiment, the tail-passing portion 6 is configured such that the opening size can be adjusted (enlarged) as needed by connecting the two cutting portions 6b to the cutting portion 6a. Furthermore, the shape and size of the tail-passing portion 6 are not limited by this embodiment. For example, at least one of the cutting portions 6a and 6b is not a cut, but is formed by an opening with a predetermined area (e.g., an elliptical opening).

[0078] A pair of wings F1 protruding outward in the width direction X are formed on both sides of the ventral side 21. Similarly, a pair of wings F2 protruding outward in the width direction X are formed on both sides of the dorsal side 22. A pair of fastening tabs 50 are provided on the pair of wings F1. A target part 53 is provided in the area between the pair of wings F2 in the dorsal side 22.

[0079] Each fastening tongue 50 extends outward from both ends (end F1a in the width direction X) of the body portion 2 (wing F1) in the width direction X. Each fastening tongue 50 has a rectangular shape that is longer in the width direction X and is disposed near the end 2a on the ventral side of the body portion 2. Each fastening tongue 50 has a base plate 51 that engages with the wing F1 and an engaging portion 52 provided on the skin-side surface of the base plate 51. A portion of the base plate 51 is, for example, sandwiched between the side plate 5 and the back plate 4. The engaging portion 52 constitutes, for example, a planar fastener (e.g., a plurality of hook-shaped members) capable of engaging with the target portion 53.

[0080] The target portion 53 has a rectangular shape that is longer in the width direction X, and the non-skin side of the back sheet 4 (outer sheet 41) is disposed near the end 2b on the back side of the body portion 2. For example... Figure 5 As shown, in the wearing state, the engaging portion 52 of a pair of fastening tongues 50 engages with the target portion 53. Figure 5 This indicates the state of pet P standing up while wearing the equipment.

[0081] The main body 2 has a pair of elastic members 8 that contract in the length direction Y, which are arranged to extend in the length direction Y along the outer edge 2c of the main body 2 in the width direction X (in this embodiment, the portion of the outer edge 2c located in the crotch portion 23 where the wings F1 and F2 are not provided). Each elastic member 8 is, for example, the same type of threaded rubber as the elastic member 7. In this embodiment, as... Figure 3 As shown, each elastic member 8 is disposed between the second sheet 32 ​​and the back sheet 4 (leak-proof sheet 42). Figure 5 As shown, in the wearing state, the outer edge 2c of the main body 2 contracts in the length direction Y through a pair of elastic members 8, so that the leg folds that fit with the leg circumference of the pet P function as leg folds.

[0082] Pet diaper 1 has a portion between the easily tearable cut-off portion 6a and the two cut-off portions 6b. Figure 8 The structure of the boundary region B shown is described below. An example of the structure described above will be explained in detail below.

[0083] like Figure 3 , Figure 4 ,and Figure 6 As shown, the first sheet 31 has a plurality of regularly arranged openings 31a (first openings). Each opening 31a extends through the thickness direction Z and has a predetermined area. That is, unlike cuts, each opening 31a is formed by removing a portion of the first sheet 31 in a manner that results in a predetermined area. In this embodiment, each opening 31a is circular when viewed from the thickness direction Z. Moreover, as... Figure 6As shown, multiple openings 31a are arranged in a diamond-shaped grid, and the distance d1 between the centers C1 of two adjacent openings 31a is the same across all openings 31a. The width w1 of each opening 31a is, for example, about 1.2 mm. In this embodiment, since the openings 31a are circular, the width w1 of each opening 31a is equal to its diameter. When the openings 31a have a shape other than a circle (e.g., an ellipse), the width w1 of each opening 31a can be defined as the radius of a circle having the smallest radius including the openings 31a (in other words, the maximum distance between any two points on the edge of the opening 31a). Because the first sheet 31 is provided on the second sheet 32, the surface of the second sheet 32 ​​is exposed to the skin side via the openings 31a.

[0084] like Figure 3 , Figure 4 ,and Figure 7 As shown, the outer sheet 41 has a plurality of regularly arranged openings 41a (second openings). Each opening 41a extends through the thickness direction Z and has a predetermined area. In this embodiment, each opening 41a has the same shape as the opening 31a and is arranged in the same manner as the plurality of openings 31a. That is, each opening 41a is circular when viewed from the thickness direction Z. Moreover, as... Figure 7 As shown, multiple openings 41a are arranged in a diamond-shaped grid, and the distance d2 between the centers C2 of two adjacent openings 41a is the same across all openings 41a. The width w2 of the opening 41a is, for example, about 1.2 mm. In this embodiment, since the opening 41a is circular, the width w2 of the opening 41a is equal to the diameter of the opening 41a. When the opening 41a has a shape other than a circle (e.g., an ellipse), the width w2 of the opening 41a can be defined as the radius of a circle having the smallest radius including the opening 41a (in other words, the maximum value of the distance between any two points on the edge of the opening 41a). Because the outer sheet 41 is provided on the leak-proof sheet 42, the surface of the leak-proof sheet 42 is exposed on the non-skin side via the openings 41a.

[0085] In the boundary region B between the cut-off portion 6a and the cut-off portion 6b of the main body portion 2, at least one opening (opening 31a or opening 41a) is provided on at least one of the first sheet 31 and the outer sheet 41. Figure 8 As shown, in this embodiment, for one example, two openings 31a (i.e., openings 31a that are configured to overlap with the boundary region B in at least a portion) and two openings 41a (i.e., openings 41a that are configured to overlap with the boundary region B in at least a portion) are provided in the boundary region B.

[0086] For example, boundary region B can be defined as the region of a line segment whose straight-line distance along the connecting cut-off portion 6a and cut-off portion 6b is minimized (i.e., point Pa on cut-off portion 6a and point Pb on cut-off portion 6b). In other words, boundary region B can be defined as the region where the tear length required to connect cut-off portion 6a and cut-off portion 6b after tearing the main body portion 2 is minimized (i.e., the region containing the aforementioned line segment). In this embodiment, point Pb corresponds to the end of the straight-lined cut-off portion 6b on the cut-off portion 6a side (ventral side). Point Pa corresponds to the position with the minimum distance from point Pb. For example, boundary region B can be defined as a rectangular region having a predetermined width (e.g., the same width as the widths w1 and w2 of openings 31a and 41a) in a direction orthogonal to the aforementioned line segment, extending from point Pa to point Pb with the aforementioned line segment as the center line. In this embodiment, the boundary region B exists in two places: between the cut-off portion 6a and the left cut-off portion 6b, and between the cut-off portion 6a and the right cut-off portion 6b. Figure 8 This indicates the region B containing the boundary region between the cut-off portion 6a and the left-side cut-off portion 6b.

[0087] Next, the effects of the pet diaper 1 described above will be explained. In the pet diaper 1, the tail-passing portion 6 has a cut-off portion 6a and a cut-off portion 6b that are provided separately from each other. That is, by connecting the cut-off portion 6a and the cut-off portion 6b, a predetermined size can be formed (in this embodiment, it is connected to the tail-passing portion 6b). Figure 2 The tail of the area (corresponding to the size of region A) passes through the hole. Furthermore, in the boundary region B between the cut-off portion 6a and the cut-off portion 6b, openings 31a and 41a are provided on at least one of the surface sheet (first sheet 31) constituting the body portion 2 and the outer sheet 41 (in this embodiment, both sheets). That is, as... Figure 8 As shown, at least one opening (in this embodiment, two openings 31a and two openings 41a) is provided in such a way that it includes at least a portion of the boundary region B. By providing such an opening in the boundary region B, the material strength of the portion corresponding to the boundary region B of the body part 2 is weakened, so that this portion can be easily torn. In addition, the fact that the portion corresponding to the boundary region B of the body part 2 can be easily torn results in the body part 2 being prevented from being torn in an unexpected direction when the user uses the pet diaper 1 and wants to tear this portion to connect the cut portions 6a and 6b. Therefore, according to the pet diaper 1, tearing for connecting multiple cut portions 6a, 6b can be performed easily and with good precision.

[0088] In addition, in the present embodiment, although a plurality (a total of four) of the openings 31a or 41a are provided in the boundary region B, in order to obtain the above effects, it is sufficient to provide at least one opening in the boundary region B. However, from the viewpoint of enhancing the above effects, it is preferable to provide a plurality of openings in the boundary region B as in the present embodiment.

[0089] As Figure 8 shown, the width w1 of the opening 31a (see Figure 6 ) is smaller than the shortest distance between the cut portions 6a and 6b (that is, the distance d between the points Pa and Pb). Similarly, the width w2 of the opening 41a (see Figure 7 ) is also smaller than the distance d. That is, "w1 < d" and "w2 < d" are satisfied. According to the above structure, in the state before use of the pet diaper 1, it is possible to prevent the cut portions 6a and 6b from being connected via the openings 31a and 41a, and the state in which the cut portions 6a and 6b are separated can be appropriately maintained.

[0090] Furthermore, in the present embodiment, the widths w1 and w2 of the openings 31a and 41a are set to be 1 / 2 or less of the above-mentioned shortest distance (distance d). That is, "w1 ≤ d / 2" and "w2 ≤ d / 2" are satisfied. According to the above structure, in the state before use of the pet diaper 1, the state in which the cut portions 6a and 6b are separated can be more appropriately maintained, and the case where the portion corresponding to the boundary region B of the main body portion 2 (the portion between the cut portions 6a and 6b) is inadvertently torn can be suppressed.

[0091] Preferably, the distance d is set to be 3 mm or more and 5 mm or less. By setting the distance d to be 3 mm or more (that is, not setting the distance between the cut portions 6a and 6b to be too short), it is possible to effectively suppress the case where the portion corresponding to the boundary region B of the main body portion 2 is inadvertently torn. By controlling the distance d to be 5 mm or less (that is, not setting the distance between the cut portions 6a and 6b to be too long), it is possible to suppress the case where it becomes difficult to tear the portion corresponding to the boundary region B of the main body portion 2.

[0092] As described above, the first sheet 31 is joined to the second sheet 32 by a hot melt adhesive. As an example in the present embodiment, by arranging the linear hot melt adhesive H discharged in a spiral shape from a plurality of nozzles (not shown) arranged along the width direction X as Figure 9 shown between the first sheet 31 and the second sheet 32, the first sheet 31 is joined to the second sheet 32. Preferably, the width d H (line width) of such a hot melt adhesive H is larger than the width w1 of the opening 31a and smaller than the distance d1 (opening pitch) between the centers C1 of two adjacent openings 31a.

[0093] According to the above structure, interlayer peeling of the body portion 2 in the tail-through portion 6 is appropriately suppressed, and leakage of the hot melt adhesive H from the opening 31a is prevented. More specifically, when the width d H When the width w1 of the opening 31a is less than a certain value, for example, when applying hot melt adhesive H to the first sheet 31, the entire line width of the hot melt adhesive H enters the opening 31a, raising concerns that the hot melt adhesive H may easily leak out from the opening 31a. In contrast, by increasing the width w1... H Setting the width d to be larger than the width w1 prevents leakage of the hot melt adhesive H through the opening 31a, and ensures the bonding strength between the first sheet 31 and the second sheet 32. On the other hand, when the width d... H When the distance is set to d1 or greater, it is easy to cover the entire opening 31a with hot melt adhesive H, which may damage the opening 31a (for example, making it easier to tear the boundary area B as described above, or improving ventilation, etc.). From the above point of view, it is preferable that the width d H Set to "w1" <d H <d1”。

[0094] Similarly, as Figure 9 As shown, a spirally discharged linear hot-melt adhesive H is disposed between the outer sheet 41 and the leak-proof sheet 42, with the outer sheet 41 bonded to the leak-proof sheet 42. For the same reasons as described above, it is preferable that the width d of the hot-melt adhesive H is... H The (line width) is larger than the width w2 of the opening 41a, and smaller than the distance d2 (opening spacing) between the centers C2 of two adjacent openings 41a (i.e., it is set to "w2"). <d H <d2”)。

[0095] Additionally, preferably, the moisture permeability of the leak-proof sheet 42 is 500 g / (m²). 2 (24h) or more. That is, preferably, the material of the leak-proof sheet 42 meets the above-mentioned moisture permeability conditions. The moisture permeability of the leak-proof sheet 42 can be determined according to the moisture permeability test method (cup method) for moisture-proof packaging materials specified in "JIS Z 0208:1976". Alternatively, preferably, a plurality of micropores are formed in the leak-proof sheet 42. The width (diameter) of the micropores is, for example, 0.05 mm or more and 1.0 mm or less, and the center-to-center distance (spacing) between adjacent micropores is, for example, 0.05 mm or more and 1.0 mm or less. Alternatively, the leak-proof sheet 42 may also meet both of the above requirements. That is, the leak-proof sheet 42 may also have a plurality of micropores and also meet the above-mentioned moisture permeability conditions. By constructing the leak-proof sheet 42 in a manner that meets at least one of the above requirements, the leak-proof sheet 42 (the portion disposed in the boundary region B of the body part 2) can be easily torn. As a result, the tearing process of the portion corresponding to the boundary region B of the main body 2 can be further facilitated.

[0096] In boundary region B, at least one opening 31a is provided on the first sheet 31, and at least one opening 41a is provided on the outer sheet 41. Figure 8 In the example shown, in boundary region B, the two openings 31a and two openings 41a are arranged with at least a partial overlap. According to the above structure, in boundary region B, by providing openings 31a and 41a on both sides of the first sheet 31 and the outer sheet 41 that sandwich the leak-proof sheet 42 and are located on opposite sides of each other, the portion corresponding to the boundary region B of the body part 2 can be torn more easily.

[0097] like Figure 8 As shown, in boundary region B, at least one opening 31a and at least one opening 41a have portions that overlap each other in the Z-axis direction. In this embodiment, each of the two openings 31a and each of the two openings 41a have portions that overlap each other within boundary region B. According to the above structure, since the material strength (thickness) of the body part 2 can be reduced in the overlapping portion of the openings 31a and 41a, this portion can be easily torn. As a result, the tearing process of the portion corresponding to the boundary region B of the body part 2 can be further facilitated.

[0098] Or, such as Figure 10 In the modified example shown, the overlapping portion of openings 31a and 41a in the Z-axis direction may not be provided in boundary region B. In other words, at least in boundary region B, openings 31a and 41a may be arranged so that they do not overlap in the Z-axis direction. Figure 10For example, by staggering the positions of multiple openings 31a arranged in a diamond grid pattern with the positions of multiple openings 41a, even outside the boundary region B, the openings 31a and 41a are arranged in a non-overlapping manner. According to the above structure, by preventing the overlapping of openings 31a and 41a in the boundary region B (i.e., the portion where the material strength (thickness) of the body part 2 is particularly low), the possibility of the portion corresponding to the boundary region B of the body part 2 being too easily torn, or even accidentally torn, can be suppressed.

[0099] Furthermore, in this embodiment, the tail-passing portion 6 is positioned where it does not overlap with the absorbent core 11. That is, in the area where the tail-passing portion 6 is located (e.g., Figure 2 In region A), no absorbent layer (absorbent body 10) is disposed between the second sheet 32 ​​and the leak-proof sheet 42; the second sheet 32 ​​and the leak-proof sheet 42 are bonded together by an adhesive such as a hot-melt adhesive. This prevents urine from leaking out from the edge (cut) of the tail-through portion 6. Furthermore, by providing multiple openings 31a on the first sheet 31 of the absorbent body 10, urine flow or retention on the surface of the first sheet 31 can be appropriately prevented. Additionally, by making the sheets disposed on the absorbent body 10 into a two-layer structure of the first sheet 31 and the second sheet 32, and by providing openings 31a only on the upper first sheet 31 and no openings on the second sheet 32 ​​covering the absorbent body 10, leakage of SAP and the like contained in the absorbent body 10 (mainly the absorbent core 11) to the outside can be appropriately prevented.

[0100] [Variation Example]

[0101] While the above description pertains to embodiments of the present invention, the present invention is not limited to the above embodiments. The materials and shapes of each structure are not limited to those described above, and various materials and shapes can be used. Furthermore, some structures included in the structures of the above embodiments may be modified or omitted, and other structures may be added.

[0102] For example, in the above embodiment, although openings 31a and 41a are formed on both sides of the first sheet 31 and the outer sheet 41, an opening may also be formed on only one side of the first sheet 31 and the outer sheet 41. Furthermore, from the viewpoint of facilitating tearing processing of the portion corresponding to the boundary region B, openings 31a or 41a may only be provided in the boundary region B. That is, openings 31a or 41a may not be provided in areas outside the boundary region B. Furthermore, the arrangement pattern of the plurality of openings 31a is not limited to the diamond-shaped grid pattern of the above embodiment, and may be arranged according to other patterns. Additionally, the plurality of openings 31a may be arranged irregularly. The same applies to the plurality of openings 41a.

[0103] Furthermore, in the above embodiment, although the sheet member closer to the skin than the absorbent 10 is composed of two layers of sheets (first sheet 31 and second sheet 32), it may also be composed of only one surface sheet. In this case, the same opening as the opening 31a may be provided on the surface sheet.

[0104] Explanation of reference numerals in the attached figures

[0105] 1: Pet diaper; 2: Body part; 4: Back sheet; 6: Tail passage part; 6a: Cut-off part (first cut-off part); 6b: Cut-off part (second cut-off part); 11: Absorbent core; 31: First sheet (surface sheet); 31a: Opening part (first opening part); 41: Outer sheet (outer sheet); 41a: Opening part (second opening part); 42: Leak-proof sheet (inner sheet); B: Boundary area; H: Hot melt adhesive; P: Pet.

Claims

1. A pet diaper that can be worn on a pet, and having a body portion having: A surface sheet, formed of nonwoven fabric, is positioned facing the pet's skin when the pet diaper is worn on the pet. The back panel, in the worn state, is positioned on the side opposite to the pet's skin side; as well as An absorbent core is disposed between the surface sheet and the back sheet. The back sheet has: An outer sheet, formed of nonwoven fabric, constitutes the outermost surface of the body portion; and An inner sheet is disposed between the outer sheet and the absorbent core. The main body is provided with a tail-passing part for the pet's tail to pass through. The tail-through portion has a first cutting portion formed by cutting the body portion along the thickness direction, which is the stacking direction of the sheets constituting the body portion, and a second cutting portion disposed above the ground from the first cutting portion. In the boundary region between the first cut-off portion and the second cut-off portion of the body portion, at least one opening with a predetermined area is provided on at least one of the surface sheet and the outer sheet, extending through the thickness direction.

2. The pet diaper according to claim 1, wherein, The width of the opening is smaller than the shortest distance between the first cut and the second cut.

3. The pet diaper according to claim 2, wherein, The width of the opening is less than half of the shortest distance.

4. The pet diaper according to claim 3, wherein, The shortest distance is between 3mm and 5mm.

5. The pet diaper according to claim 1, wherein, The at least one opening comprises a plurality of openings arranged in a regular pattern. The width of the linear hot melt adhesive bonded to the region containing the tail through portion of at least one of the surface sheet and the outer sheet having the plurality of openings is greater than the width of the opening and smaller than the distance between the centers of two adjacent openings.

6. The pet diaper according to claim 1, wherein, The moisture permeability of the inner sheet is 500 g / (m²). 2 24h) or more.

7. The pet diaper according to claim 1, wherein, Multiple micropores are formed in the inner sheet.

8. The pet diaper according to claim 1, wherein, In the boundary region, at least one first opening with a predetermined area is provided on the surface sheet, penetrating along the thickness direction, and at least one second opening with a predetermined area is provided on the outer sheet, penetrating along the thickness direction.

9. The pet diaper according to claim 8, wherein, In the boundary region, the at least one first opening and the at least one second opening have portions that overlap each other in the thickness direction.

10. The pet diaper according to claim 8, wherein, In the boundary region, the first opening and the second opening do not have overlapping portions in the thickness direction.

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