Pet diaper

Abstract

To provide a pet diaper that allows an easily and accurate breaking process for connecting multiple cut parts.SOLUTION: A pet diaper 1 comprises a body part 2 including: a first sheet 31 made of a nonwoven fabric and disposed at a position facing the skin of a pet in a worn state; a rear surface sheet 4; and an absorbent core 11. The rear surface sheet 4 includes: an exterior sheet 41 made of a nonwoven fabric and constituting the outermost surface of the body part 2; and a leakage prevention sheet 42 disposed between the exterior sheet 41 and the absorbent core 11. The body part 2 is provided with a tail insertion part 6. The tail insertion part 6 includes: a cut part 6a formed by cutting the body part 2 in a thickness direction Z; and a cut part 6b separated from the cut part 6a. In a boundary region B between the cut part 6a and the cut part 6b of the body part 2, at least one of the first sheet 31 and the exterior sheet 41 is provided with at least one opening 31a, 41a.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to diapers for pets.

Background Art

[0002] Conventionally, diapers for pets to be worn on pets such as dogs and cats have been known. For example, Patent Document 1 discloses a pet diaper provided with a tail insertion portion (cut) for inserting a pet's tail through a portion dorsal to the absorbent core. In the pet diaper disclosed in Patent Document 1, the tail insertion portion is configured such that the size of the tail insertion hole can be adjusted by a plurality of cut portions (cuts) arranged apart from each other.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a size-adjustable tail insertion portion is configured by a plurality of cut portions as disclosed in Patent Document 1 above, in order to connect the plurality of cut portions to form a tail insertion hole of a predetermined size, it may be necessary to break a portion (boundary portion) between the plurality of cut portions in the main body portion of the pet diaper. When a strong force is required for such a breaking process, not only the convenience of the user performing the breaking process is impaired, but there is also a risk that the main body portion is broken in a direction different from the originally assumed breaking direction.

[0005] Therefore, one aspect of the present disclosure aims to provide a pet diaper configured to be able to form a tail insertion hole of a predetermined size by connecting a plurality of cut portions, and capable of easily and accurately performing a breaking process for connecting the plurality of cut portions.

Means for Solving the Problems

[0006] The pet diaper according to one aspect of the present disclosure is a pet diaper to be worn on a pet, and includes a surface sheet made of a non-woven fabric disposed at a position facing the pet's skin in a worn state where the pet diaper is worn on the pet, a back sheet disposed on the side opposite to the pet's skin side in the worn state, and an absorbent core disposed between the surface sheet and the back sheet. The back sheet has an outer sheet made of a non-woven fabric constituting the outermost surface of the main body portion, and an inner sheet disposed between the outer sheet and the absorbent core. A tail insertion portion for inserting the pet's tail is provided in the main body portion. The tail insertion portion has a first cut portion formed by cutting the main body portion in the thickness direction, which is the lamination direction of the sheets constituting the main body portion, and a second cut portion provided separately from the first cut portion. In the boundary region between the first cut portion and the second cut portion of the main body portion, at least one opening penetrating in the thickness direction and having a predetermined area is provided in at least one of the surface sheet and the outer sheet.

Advantages of the Invention

[0007] According to the present disclosure, there is provided a pet diaper configured to be able to form a tail insertion hole of a predetermined size by connecting a plurality of cut portions, and capable of easily and accurately performing a breaking process for connecting the plurality of cut portions.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0009] From the description of this specification and the attached drawings, at least the following aspects 1 to 10 become clear.

[0010] (Aspect 1) A disposable diaper for pets to be worn on a pet, A surface sheet made of a non-woven fabric disposed at a position facing the skin of the pet in a worn state where the disposable diaper for pets is worn on the pet, A back sheet disposed on the side opposite to the skin side of the pet in the worn state, An absorbent core disposed between the surface sheet and the back sheet, and having a main body part, The back sheet, An outer sheet made of a non-woven fabric constituting the outermost surface of the main body part, An inner sheet disposed between the outer sheet and the absorbent core, and having, A tail insertion part for inserting the tail of the pet is provided in the main body part, The tail insertion part has a first cutting part formed by cutting the main body part in the thickness direction which is the lamination direction of the sheets constituting the main body part and a second cutting part provided separately from the first cutting part, In a boundary region between the first cutting portion and the second cutting portion of the main body portion, at least one opening that penetrates in the thickness direction and has a predetermined area is provided in at least one of the surface sheet and the outer sheet, a pet diaper.

[0011] In the above pet diaper, the tail insertion portion has a first cutting portion and a second cutting portion provided separately from each other. That is, by connecting the first cutting portion and the second cutting portion, a tail insertion hole of a predetermined size can be formed. Further, an opening is provided in at least one of the surface sheet and the outer sheet that constitute the main body portion in a boundary region between the first cutting portion and the second cutting portion. By providing such an opening in the boundary region, it is possible to make the portion corresponding to the boundary region of the main body portion easily breakable. Further, as a result of the portion corresponding to the boundary region of the main body portion becoming easily breakable, when the user tries to break the portion in order to connect the first cutting portion and the second cutting portion when using the pet diaper, it is also possible to prevent the main body portion from breaking in an unexpected direction. Therefore, according to the above pet diaper, the breaking process for connecting a plurality of cutting portions can be performed easily and accurately.

[0012] (Aspect 2) The width of the opening is smaller than the shortest distance between the first cutting portion and the second cutting portion, the pet diaper of Aspect 1.

[0013] According to Aspect 2, in a state before using the pet diaper, it is possible to prevent the first cutting portion and the second cutting portion from being connected through the opening, and to appropriately maintain a state in which the first cutting portion and the second cutting portion are separated.

[0014] (Aspect 3) The width of the opening is 1 / 2 or less of the shortest distance, the pet diaper of Aspect 2.

[0015] According to Aspect 3, in the state before use of the pet diaper, the state in which the first cutting portion and the second cutting portion are separated can be more preferably maintained, and the portion corresponding to the boundary region of the main body portion (the portion between the first cutting portion and the second cutting portion) can be prevented from being accidentally torn.

[0016] (Aspect 4) The shortest distance is 3 mm or more and 5 mm or less, and the pet diaper of Aspect 3.

[0017] By setting the shortest distance between the first cutting portion and the second cutting portion to 3 mm or more, it is possible to effectively prevent the portion corresponding to the boundary region of the main body portion from being accidentally torn, and by suppressing the shortest distance to 5 mm or less, it is possible to prevent the breakage of the portion corresponding to the boundary region of the main body portion from becoming difficult.

[0018] (Aspect 5) The at least one opening includes a plurality of regularly arranged openings, The width of the linear hot melt adhesive adhered to the region including the tail insertion portion in at least one of the surface sheet and the outer sheet provided with the plurality of openings is larger than the width of the opening and smaller than the distance between the centers of two adjacent openings, and the pet diaper according to any one of Aspects 1 to 4.

[0019] According to Aspect 5, while preferably suppressing delamination between the layers of the main body portion in the tail insertion portion, it is possible to prevent the hot melt adhesive from oozing out from the opening.

[0020] (Aspect 6) The moisture permeability of the inner sheet is 500 g / (m 2 ·24 h) or more, and the pet diaper according to any one of Aspects 1 to 5.

[0021] (Aspect 7) A plurality of micropores are formed in the inner sheet, and the pet diaper according to any one of Aspects 1 to 6.

[0022] According to Aspect 6 or 7, the inner sheet can be made easier to break. As a result, the breaking process of the portion corresponding to the boundary region of the main body can be further facilitated.

[0023] (Aspect 8) In the boundary region, at least one first opening penetrating in the thickness direction and having a predetermined area is provided in the surface sheet, and at least one second opening penetrating in the thickness direction and having a predetermined area is provided in the outer sheet, for the pet diaper according to any one of Aspects 1 to 7.

[0024] According to Aspect 8, by providing openings in both the surface sheet and the outer sheet in the boundary region, the portion corresponding to the boundary region of the main body can be made even easier to tear.

[0025] (Aspect 9) In the boundary region, the at least one first opening and the at least one second opening have a portion overlapping each other in the thickness direction, for the pet diaper of Aspect 8.

[0026] According to Aspect 9, since the material strength (thickness) of the main body can be reduced at the overlapping portion of the first opening and the second opening, the said portion can be made easier to break. As a result, the breaking process of the portion corresponding to the boundary region of the main body can be further facilitated.

[0027] (Aspect 10) In the boundary region, the portion where the first opening and the second opening overlap each other in the thickness direction is not provided, for the pet diaper of Aspect 8.

[0028] According to Aspect 10, by preventing the formation of a portion where the first opening and the second opening overlap (i.e., a portion where the material strength (thickness) of the main body is particularly small) in the boundary region, it is possible to suppress the portion corresponding to the boundary region of the main body from being too easily torn, and thus prevent the portion corresponding to the boundary region from being torn unintentionally.

[0029] [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.

[0030] With reference to FIGS. 1 to 4, the overall configuration of the pet diaper 1 according to one embodiment will be described. FIG. 1 is a plan view of the pet diaper 1 as seen from the skin side. FIG. 2 is a plan view of the pet diaper 1 as 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 of FIG. 1. FIG. 4 is a cross-sectional view of the pet diaper 1 taken along line IV-IVI of FIG. 1. In FIGS. 1 and 2, the openings 31a and 41a described later are not shown. The pet diaper 1 is a diaper worn by a pet. In this specification, "pet" broadly includes vertebrates and invertebrates, and typically includes pet animals such as dogs, cats, rabbits, hamsters, etc. As an example, the pet diaper 1 is a diaper for dogs.

[0031] In the present embodiment, the "skin side" is the side facing the pet's skin in the state where the pet diaper 1 is worn on the pet. The "non-skin side" is the side directed to the side opposite to the pet's skin in the worn state. As shown in FIG. 1, the pet diaper 1 has a longitudinal direction Y connecting the ventral side to the dorsal side of the pet, a width direction X orthogonal to the longitudinal direction Y and arranged along the pet's body circumference direction, and a thickness direction Z orthogonal to the longitudinal direction Y and the width direction X. As shown in FIG. 3, the thickness direction Z is the stacking direction of the respective materials (the first sheet 31, the second sheet 32, 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".

[0032] 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 parts in the longitudinal direction Y, one region located most ventrally corresponds to the ventral portion 21, one region located most dorsally corresponds to the dorsal portion 22, and two regions located between the ventral portion 21 and the dorsal portion 22 (that is, the central portion of the main body portion 2 in the longitudinal direction Y) correspond to the crotch portion 23.

[0033] The main body portion 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.

[0034] The first sheet 31 is a sheet made of a non-woven fabric disposed at a position facing the pet's skin in the worn state. The first sheet 31 is, for example, a non-woven fabric such as an air-through non-woven fabric, a spunbond non-woven fabric, a meltblown non-woven fabric, a point-bond non-woven fabric, a needle-punched non-woven fabric, or a spunlace non-woven fabric. In the present embodiment, the first sheet 31 is constituted by an air-through non-woven fabric. Examples of the fiber material of the first sheet 31 include rayon, acetate, cotton, pulp, synthetic fibers, and the like. In the present embodiment, as an example, in the extended state (FIG. 1), the first sheet 31 is disposed between the tops of the side sheets 5 on both the left and right sides and is formed in a rectangular shape extending in the longitudinal direction Y from the ventral end 2a to the dorsal end 2b of the main body portion 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 region where the first sheet 31 is disposed are not limited to the present embodiment. The first sheet 31 may be provided in at least a portion including a boundary region B described later. The first sheet 31 is joined to the second sheet 32 by a hot melt adhesive (HMA).

[0035] The second sheet 32 is a liquid-permeable sheet disposed between the first sheet 31 and the absorber 10. The second sheet 32 can be constituted by, for example, a non-woven fabric similar to the first sheet 31. The second sheet 32 is provided wider than the first sheet 31 and is also provided at a position overlapping the pair of side sheets 5.

[0036] 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 by, for example, a liquid-impermeable non-woven fabric, a synthetic resin film, or a composite sheet thereof. In the present embodiment, the back sheet 4 has an outer wrapper sheet 41 (outer sheet) and a leak-proof sheet 42 (inner sheet). The outer wrapper sheet 41 is disposed on the outer side (non-skin side) of the leak-proof sheet 42 and constitutes the outermost surface of the main body portion 2. The outer wrapper sheet 41 is formed by, for example, a liquid-impermeable non-woven fabric. The leak-proof sheet 42 is disposed between the outer wrapper sheet 41 and the absorber 10 (absorbent core 11) and is joined to the outer wrapper sheet 41. More specifically, the outer wrapper sheet 41 is joined to the leak-proof sheet 42 by a hot melt adhesive (HMA). The leak-proof sheet 42 is formed by, for example, a liquid-impermeable synthetic resin film.

[0037] 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 first sheet 31. 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 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.

[0038] As shown in FIG. 1, each side sheet 5 is joined (fixed) to the second sheet 32 at a fixing part R surrounded by a dashed line and hatched with oblique lines. Each fixing part R is disposed over the entire longitudinal direction Y of the main body part 2. 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.

[0039] A portion between an inner end R2a in the longitudinal direction Y of the fixed portion R2 and an inner end R3a in the longitudinal direction Y of the fixed portion R3 of the side sheet 5 (that is, a portion of the side sheet 5 where the elastic member 7 is disposed and is not joined to the second sheet 32) constitutes the standing portion 5a. The standing portion 5a is a portion that functions as the 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 fixed portion R1 as a fulcrum by fixing both end portions in the longitudinal direction Y to the fixed portions R2 and R3 and contracting in the longitudinal direction Y. That is, the end portion R1a of the fixed portion R1 functions as a standing fulcrum of the leg side gather LSG.

[0040] 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). 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 side portion 21 and the crotch portion 23 and is not disposed on the dorsal side 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 a 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.

[0041] 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 cutting portion 6a (first cutting portion) and two cutting portions 6b (second cutting portions) provided separately from the cutting portion 6a. The cutting portions 6a and 6b are formed by cutting the main body 2 in the thickness direction Z and penetrate the main body 2 in the thickness direction Z. The cutting portion 6a is provided at the center in the width direction X of a region dorsal to the absorbent core 11 of the crotch portion 23. The cutting 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 dorsally. The two cutting portions 6b are provided on both sides with the center line CL interposed therebetween at positions dorsal to the cutting portion 6a and close to the cutting portion 6a. The two cutting portions 6b have a linear shape that is inclined with respect to the longitudinal direction Y such that the distance between the two cutting portions 6b widens from the ventral side toward the dorsal side.

[0042] By pushing the portion ventral to the cutting portion 6a and between the ends in the width direction X of the cutting portion 6a into the non-skin side, a substantially semi-circular opening for inserting the tail of a pet is formed. Also, by breaking the portion of the main body 2 between the cutting portion 6a and the two cutting portions 6b, the cutting portion 6a and the two cutting 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 cutting 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 cutting portions 6b to the cutting portion 6a as needed. Note that the shape and size of the tail insertion portion 6 are not limited to those of the present embodiment. For example, at least one of the cutting portions 6a and 6b may be formed by an opening having a predetermined area (for example, an elliptical opening or the like) instead of a cut.

[0043] On both sides of the ventral part 21 in the width direction X, a pair of flap parts F1 protruding outward in the width direction X are formed. 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.

[0044] Each fastening tab 50 extends outward in the width direction X from both end portions (end portions 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 portion 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 portion 52 provided on the skin side surface of the base material sheet 51. A part of the base material sheet 51 is sandwiched, for example, between the side sheet 5 and the back sheet 4. The engaging portion 52 is, for example, a surface fastener (for example, a plurality of hook-shaped members) configured to be engageable with the target part 53.

[0045] The target part 53 has a rectangular shape that is long in the width direction X and is arranged near the dorsal end portion 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. 4, in the worn state, the engaging portions 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.

[0046] 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 that contract in the longitudinal direction Y. Each elastic member 8 is, for example, a thread rubber or the like similar to the elastic member 7. In this embodiment, as shown in FIG. 3, each elastic member 8 is arranged between the second sheet 32 and the back sheet 4 (leak-proof 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.

[0047] The pet diaper 1 has a configuration for facilitating the tearing of the portion between the cutting portion 6a and the two cutting portions 6b (the boundary region B shown in FIG. 8). Hereinafter, an example of the above configuration will be described in detail.

[0048] As shown in FIGS. 3, 4, and 6, the first sheet 31 is provided with a plurality of regularly arranged openings 31a (first openings). Each opening 31a penetrates in the thickness direction Z and has a predetermined area. That is, each opening 31a is formed by cutting out a part of the first sheet 31 so as to have a predetermined area, unlike a notch. In this embodiment, each opening 31a is formed in a circular shape when viewed in the thickness direction Z. Further, as shown in FIG. 6, the plurality of openings 31a are arranged in a rhombic lattice pattern, and the distance d1 between the centers C1 of two adjacent openings 31a is the same for all the openings 31a. The width w1 of the opening 31a is, for example, about 1.2 mm. In this embodiment, since the opening 31a is circular, the width w1 of the opening 31a is equal to the diameter of the opening 31a. When the opening 31a has a shape other than a circular shape (for example, an elliptical shape, etc.), the width w1 of the opening 31a can be defined as the radius of the circle having the minimum radius that encloses the opening 31a (in other words, the maximum value of the distance between any two points on the edge of the opening 31a). Since the first sheet 31 is provided on the second sheet 32, the surface of the second sheet 32 is exposed to the skin side through the opening 31a.

[0049] As shown in FIGS. 3, 4, and 7, the exterior sheet 41 is provided with a plurality of regularly arranged openings 41a (second openings). Each opening 41a penetrates in the thickness direction Z and has a predetermined area. In the present 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 formed in a circular shape when viewed from the thickness direction Z. Further, as shown in FIG. 7, the plurality of openings 41a are arranged in a rhombic lattice pattern, and the distance d2 between the centers C2 of two adjacent openings 41a is the same for all the openings 41a. The width w2 of the opening 41a is, for example, about 1.2 mm. In the present 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 circular shape (for example, an elliptical shape, etc.), the width w2 of the opening 41a can be defined as the radius of the circle having the minimum radius that includes the opening 41a (in other words, the maximum value of the distance between any two points on the edge of the opening 41a). Since the exterior sheet 41 is provided on the leak-proof sheet 42, the surface of the leak-proof sheet 42 is exposed to the non-skin side through the opening 41a.

[0050] In the boundary region B between the cut portions 6a and 6b of the main body portion 2, at least one opening (opening 31a or opening 41a) is provided in at least one of the first sheet 31 and the exterior sheet 41. As shown in FIG. 8, in the present embodiment, as an example, two openings 31a (that is, openings 31a arranged so that at least a part thereof overlaps the boundary region B) and two openings 41a (that is, openings 41a arranged so that at least a part thereof overlaps the boundary region B) are arranged in the boundary region B.

[0051] As an example, the boundary region B can be defined as a region along the line segment connecting two points (i.e., point Pa on the cutting portion 6a and point Pb on the cutting portion 6b) where the linear distance between the cutting portion 6a and the cutting portion 6b is minimized. In other words, the boundary region B can be defined as the region where the breaking length required to break the main body portion 2 and connect the cutting portion 6a and the cutting portion 6b is minimized (i.e., the region including the above line segment). In the present embodiment, the point Pb corresponds to the end portion on the cutting portion 6a side (ventral side) of the linearly extending cutting portion 6b. The point Pa corresponds to the position where the distance from the point Pb is minimized. For example, the boundary region B can be defined as a rectangular region having a predetermined width (e.g., the same width as the widths w1, w2 of the openings 31a, 41a) in a direction orthogonal to the above line segment and extending from the point Pa to the point Pb with the above line segment as the center line. In the present embodiment, the boundary region B exists at two locations, between the cutting portion 6a and the left cutting portion 6b, and between the cutting portion 6a and the right cutting portion 6b. FIG. 8 shows the region including the boundary region B between the cutting portion 6a and the left cutting portion 6b.

[0052] Next, the effects of the pet diaper 1 described above will be explained. In the pet diaper 1, the tail insertion portion 6 has a cut portion 6a and a cut portion 6b that are separated from each other. That is, by connecting the cut portion 6a and the cut portion 6b, a tail insertion hole of a predetermined size (in this embodiment, the size corresponding to the region A in FIG. 2) can be formed. Further, in the boundary region B between the cut portion 6a and the cut portion 6b, openings 31a and 41a are provided in at least one of the surface sheet (first sheet 31) and the exterior sheet 41 that constitute the main body portion 2 (both sheets in this embodiment). That is, as shown in FIG. 8, at least one opening (in this embodiment, two openings 31a and two openings 41a) is arranged so that at least a part thereof is included in the boundary region B. By providing such an opening in the boundary region B, the material strength of the portion of the main body portion 2 corresponding to the boundary region B can be weakened, so that the portion can be easily broken. Further, as a result of the portion of the main body portion 2 corresponding to the boundary region B becoming easily breakable, when the user tries to break the portion in order to connect the cut portion 6a and the cut portion 6b when using the pet diaper 1, it is also possible to prevent the main body portion 2 from breaking in an unexpected direction. Therefore, according to the pet diaper 1, the breaking process for connecting the plurality of cut portions 6a and 6b can be performed easily and accurately.

[0053] In this embodiment, a plurality (four in total) of the openings 31a or 41a are arranged in the boundary region B. However, in order to obtain the above effects, at least one opening may be arranged in the boundary region B. However, from the viewpoint of improving the above effects, it is preferable that a plurality of openings are arranged in the boundary region B as in this embodiment.

[0054] As shown in Fig. 8, the width w1 of the opening 31a (see Fig. 6) is smaller than the shortest distance between the cutting portion 6a and the cutting portion 6b (i.e., the distance d between the point Pa and the point Pb). Similarly, the width w2 of the opening 41a (see Fig. 7) is also smaller than the distance d. That is, "w1 < d" and "w2 < d" are satisfied. According to the above configuration, in the state before use of the pet diaper 1, it is possible to prevent the cutting portion 6a and the cutting portion 6b from being connected through the openings 31a and 41a, and appropriately maintain the state in which the cutting portion 6a and the cutting portion 6b are separated.

[0055] 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 shortest distance (distance d). That is, "w1 < d / 2" and "w2 < d / 2" are satisfied. According to the above configuration, in the state before use of the pet diaper 1, it is possible to more preferably maintain the state in which the cutting portion 6a and the cutting portion 6b are separated, and suppress the portion corresponding to the boundary region B of the main body portion 2 (the portion between the cutting portion 6a and the cutting portion 6b) from being accidentally torn.

[0056] The distance d is preferably set to be 3 mm or more and 5 mm or less. By setting the distance d to be 3 mm or more (i.e., not making the distance between the cutting portions 6a and 6b too short), it is possible to effectively suppress the portion corresponding to the boundary region B of the main body portion 2 from being accidentally torn. Also, by keeping the distance d at 5 mm or less (i.e., not making the distance between the cutting portions 6a and 6b too long), it is possible to suppress the breakage of the portion corresponding to the boundary region B of the main body portion 2 from becoming difficult.

[0057] As described above, the first sheet 31 is joined to the second sheet 32 by a hot melt adhesive. In the present embodiment, as an example, as shown in Fig. 9, a linear hot melt adhesive H discharged spirally from a plurality of nozzles (not shown) arranged in the width direction X is disposed between the first sheet 31 and the second sheet 32, whereby the first sheet 31 is joined to the second sheet 32. The width d of such a hot melt adhesive H HThe (line width) is preferably 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.

[0058] According to the above configuration, while suitably suppressing delamination of the main body 2 in the tail insertion portion 6, it is possible to prevent seepage of the hot melt adhesive H from the opening 31a. More specifically, when the width d H is made equal to or less than the width w1 of the opening 31a, for example, when applying the hot melt adhesive H to the first sheet 31, the entire line width of the hot melt adhesive H may enter the opening 31a, and the hot melt adhesive H may easily leak out of the opening 31a. In contrast, by making the width d H larger than the width w1, it is possible to prevent leakage of the hot melt adhesive H through the opening 31a as described above and to ensure the adhesive strength between the first sheet 31 and the second sheet 32. On the other hand, when the width d H is made equal to or greater than the distance d1, the entire opening 31a is likely to be covered with the hot melt adhesive H, and the effects of the opening 31a (for example, the effect of facilitating breakage of the boundary region B as described above, the effect of enhancing air permeability, etc.) may be impaired. From the above viewpoints, the width d H is preferably set to "w1 < d H < d1".

[0059] Similarly, as shown in FIG. 9, the linear hot melt adhesive H discharged in a spiral shape is disposed between the outer packaging sheet 41 and the leak-proof sheet 42, whereby the outer packaging sheet 41 is joined to the leak-proof sheet 42. For the same reasons as described above, the width d of the hot melt adhesive H H (line width) is preferably larger than the width w2 of the opening 41a and smaller than the distance d2 (opening pitch) between the centers C2 of two adjacent openings 41a (that is, set to "w2 < d H < d2").

[0060] Also, the moisture permeability of the leak-proof sheet 42 is 500 g / (m 2· It is preferably more than 24 h. That is, the material of the leak - proof sheet 42 preferably satisfies the above - mentioned moisture permeability conditions. The moisture permeability of the leak - proof sheet 42 can be measured by the moisture permeability test method (cup method) of moisture - proof packaging materials specified in "JIS Z 0208:1976". Alternatively, it is preferable that 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 (pitch) between adjacent micropores is, for example, 0.05 mm or more and 1.0 mm or less. Alternatively, the leak - proof sheet 42 may satisfy both of the above requirements. That is, the leak - proof sheet 42 may have a plurality of micropores formed therein and satisfy the above - mentioned moisture permeability conditions. By configuring the leak - proof sheet 42 so as to satisfy at least any one of the above requirements, the leak - proof sheet 42 (the portion disposed in the boundary region B of the main body portion 2) can be made easier to break. As a result, the breaking process of the portion corresponding to the boundary region B of the main body portion 2 can be further facilitated.

[0061] In the boundary region B, at least one opening 31a is provided in the first sheet 31, and at least one opening 41a is provided in the outer packaging sheet 41. In the example shown in FIG. 8, in the boundary region B, two openings 31a and two openings 41a are arranged so as to at least partially overlap. According to the above configuration, in the boundary region B, by providing the openings 31a and 41a in both the first sheet 31 and the outer packaging sheet 41 located on opposite sides of each other with the leak - proof sheet 42 interposed therebetween, the portion corresponding to the boundary region B of the main body portion 2 can be made even easier to tear.

[0062] As shown in FIG. 8, in the boundary region B, at least one opening 31a and at least one opening 41a have a portion overlapping with each other in the Z-axis direction. In the present embodiment, each of the two openings 31a and each of the two openings 41a have a portion overlapping with each other within the boundary region B. According to the above configuration, since the material strength (thickness) of the main body portion 2 can be reduced at the portion where the opening 31a and the opening 41a overlap, the portion can be easily broken. As a result, the breaking process of the portion of the main body portion 2 corresponding to the boundary region B can be further facilitated.

[0063] Alternatively, as in the modified example shown in FIG. 10, in the boundary region B, a portion where the opening 31a and the opening 41a overlap with each other in the Z-axis direction may not be provided. In other words, at least in the boundary region B, the opening 31a and the opening 41a may be arranged so as not to overlap with each other in the Z-axis direction. In the example of FIG. 10, by shifting the positions of the plurality of openings 31a arranged in the same rhombic lattice pattern and the positions of the plurality of openings 41a, the openings 31a and the openings 41a are also arranged so as not to overlap with each other in the region other than the boundary region B. According to the above configuration, by preventing a portion where the opening 31a and the opening 41a overlap (that is, a portion where the material strength (thickness) of the main body portion 2 is particularly small) from being formed in the boundary region B, it is possible to suppress the portion corresponding to the boundary region B of the main body portion 2 from being too easily broken, and thus the portion corresponding to the boundary region B from being broken unintentionally.

[0064] In addition, in the present embodiment, the tail insertion portion 6 is disposed at a position that does not overlap with the absorbent core 11. That is, in the region where the tail insertion portion 6 is provided (for example, region A in FIG. 2), the liquid absorption layer (absorbent body 10) is not disposed between the second sheet 32 and the leak-proof sheet 42, and the second sheet 32 and the leak-proof sheet 42 are joined to each other by an adhesive such as a hot melt adhesive. Thereby, leakage of urine from the edge (cut) of the tail insertion portion 6 is prevented. Further, since a plurality of openings 31a are provided in the first sheet 31 on the absorbent body 10, it is possible to appropriately prevent urine from flowing or being retained on the surface of the first sheet 31. Further, the sheet disposed on the absorbent body 10 has a two-layer structure of the first sheet 31 and the second sheet 32, and the opening 31a is provided only in the upper first sheet 31, and the second sheet 32 covering the absorbent body 10 is not provided with an opening, whereby it is possible to appropriately prevent the SAP or the like contained in the absorbent body 10 (mainly the absorbent core 11) from leaking to the outside.

[0065] [Modification Example] As described above, the embodiments of the present disclosure have been described, but the present disclosure is not limited to the above embodiments. The materials and shapes of each component are not limited to the materials and shapes described above, and various materials and shapes can be adopted. Further, some of the components included in the configuration of the above-described embodiment may be changed or omitted, or other components may be added.

[0066] For example, in the above embodiment, the openings 31a and 41a are formed in both the first sheet 31 and the outer sheet 41, but the opening may be formed in only one of the first sheet 31 and the outer sheet 41. Further, from the viewpoint of facilitating the breaking process of the portion corresponding to the above-described boundary region B, the opening 31a or the opening 41a may be provided only in the boundary region B. That is, the opening 31a or the opening 41a may not be provided in the region other than the boundary region B. Further, the arrangement pattern of the plurality of openings 31a is not limited to the rhombic lattice pattern of the above embodiment, and may be arranged according to other arrangement patterns. Further, the plurality of openings 31a may be arranged irregularly. The same applies to the plurality of openings 41a.

[0067] In the above embodiment, the sheet member on the skin side of the absorber 10 is composed of a two-layer sheet (the first sheet 31 and the second sheet 32), but it may be composed of only a single surface sheet. In this case, an opening similar to the opening 31a may be provided in the single surface sheet.

Explanation of Reference Numerals

[0068] 1... Diaper for pet, 2... Main body portion, 4... Back sheet, 6... Tail insertion portion, 6a... Cutting portion (first cutting portion), 6b... Cutting portion (second cutting portion), 11... Absorbent core, 31... First sheet (surface sheet), 31a... Opening (first opening), 41... Outer packaging sheet (outer sheet), 41a... Opening (second opening), 42... Leakage prevention sheet (inner sheet), B... Boundary region, H... Hot melt adhesive, P... Pet.

Claims

1. A pet diaper to be worn by a pet, a top sheet made of a nonwoven fabric and arranged in a position facing the skin of the pet when the pet diaper is worn on the pet; A back sheet that is disposed on the opposite side to the pet's skin in the attached state; an absorbent core disposed between the top sheet and the back sheet; The 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 main body is provided with a tail insertion portion for inserting the tail of the pet, The tail insertion portion has a first cut portion formed by cutting the main body portion in a thickness direction, which is a stacking direction of the sheets constituting the main body portion, and a second cut portion provided separately from the first cut portion, A pet diaper, wherein at least one of the top sheet and the outer sheet is provided with at least one opening penetrating in the thickness direction and having a predetermined area in the boundary region between the first cut portion and the second cut portion of the main body portion.

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

3. The width of the opening is equal to or less than 1 / 2 of the shortest distance. The pet diaper according to claim 2.

4. The shortest distance is 3 mm or more and 5 mm or less. The pet diaper according to claim 3.

5. the at least one opening includes a plurality of openings arranged in a regular pattern; The width of the linear hot melt adhesive adhered to the area including the tail insertion part of at least one of the top sheet and the outer sheet in which the plurality of openings are provided is larger than the width of the openings and smaller than the distance between the centers of two adjacent openings. The pet diaper according to claim 1.

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

7. The inner sheet has a plurality of micropores formed therein. The pet diaper according to claim 1.

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

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

10. In the boundary region, there is no portion where the first opening and the second opening overlap each other in the thickness direction. The pet diaper according to claim 8.

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