Pet diaper

Abstract

A pet diaper 1 comprises: a body 2 that is provided with, along the longitudinal direction Y, an abdominal-side region 21 positioned on the abdominal side of a pet in a fitting state where the pet diaper 1 is fitted on a pet, a back-side region 22 positioned on the back side of the pet in the fitting state, and a crotch region 23 positioned between the abdominal-side region 21 and the back-side region 22, and that includes an absorbent core 6 having a water-absorbing property; and an abdominal-side stretchable member 7 that has an effective region 73 which stretches in the width direction X and which is disposed in the abdominal-side region 21. The absorbent core 6 has a constricted section 63 in which the width of the absorbent core 6 is partially narrowed in the width direction X and which is disposed over the abdominal-side region 21 and the crotch region 23. The effective region 73 of the abdominal-side stretchable member 7 is disposed at a position overlapping an abdominal-side end 63b of the constricted section 63 when viewed in the thickness direction Z.

Description

Pet diapers

[0001] The present disclosure relates to pet diapers.

[0002] Patent Document 1 discloses an absorbent article for pets, which has a vertical direction and a horizontal direction perpendicular thereto, and includes a ventral region, a dorsal region, an intermediate region located between the ventral region and the dorsal region in the vertical direction, an absorbent core, and a ventral elastic body that overlaps with a first end portion located in the ventral region of the absorbent core in a plan view. In this absorbent article for pets, the overlapping of the ventral elastic body and the first end portion of the absorbent core allows the first end portion of the absorbent core to fit the body when worn, thereby suppressing urine leakage.

[0003] Japanese Patent Application Laid-Open No. 2015-228857

[0004] In the absorbent article disclosed in Patent Document 1, the absorbent core is formed to have a substantially uniform width throughout the entire lengthwise direction, so if the width of the pet's crotch area (crotch region) is narrow, the absorbent core has difficulty fitting to the pet's crotch region, which makes it difficult for the absorbent core to fit the pet's body, and there is a risk that urine leakage cannot be effectively prevented.

[0005] An object of one aspect of the present disclosure is to provide a pet diaper that can effectively prevent urine leakage.

[0006] A pet diaper according to one aspect of the present disclosure is a pet diaper to be put on a pet so as to cover at least the pet's waist, the pet diaper having a main body including an absorbent core, and a ventral-side stretchable member stretching in a width direction perpendicular to the longitudinal direction and having an effective region located in the ventral region, the absorbent core being partially narrowed in the width direction and having a first constricted portion located across the ventral region and the crotch region, the effective region of the ventral-side stretchable member being positioned so as to overlap a ventral end of the first constricted portion when viewed in a thickness direction perpendicular to the longitudinal and width directions.

[0007] According to the present disclosure, a pet diaper that can effectively prevent urine leakage can be provided.

[0008] Fig. 1 is a plan view of a pet diaper according to one embodiment, as seen from the skin side; Fig. 2 is a plan view of the pet diaper of Fig. 1, as seen from the non-skin side; Fig. 3 is a diagram schematically showing the layering state of each component in the pet diaper of Fig. 1; Fig. 4 is a diagram showing an example of how the pet diaper of Fig. 1 is worn; Fig. 5 is a plan view showing a comparison between the pet diaper of Fig. 1 and a conventional pet diaper; Fig. 6(a) is a diagram showing how the conventional pet diaper is worn, and Fig. 7(b) is a diagram showing how the pet diaper of Fig. 1 is worn.

[0009] The present specification and the accompanying drawings will make clear at least the following aspects [1] to

[11] .

[0010] [1] A pet diaper to be put on a pet so as to cover at least the pet's waist, the pet diaper having a main body portion including an absorbent core, the main body portion including a ventral region that is located on the ventral side of the pet when the pet diaper is put on the pet, a dorsal region that is located on the dorsal side of the pet when the pet diaper is put on the pet, and a crotch region that is located between the ventral region and the dorsal region, arranged along the longitudinal direction; and a ventral stretchable member that stretches in a width direction perpendicular to the longitudinal direction and has an effective region that is located in the ventral region, the absorbent core having a width that is partially narrowed in the width direction and has a first constricted portion that is located across the ventral region and the crotch region, the effective region of the ventral stretchable member being positioned so as to overlap the ventral end of the first constricted portion when viewed from a thickness direction that is perpendicular to the longitudinal direction and the width direction.

[0011] In the pet diaper of [1] above, the absorbent core has a first constricted portion that is partially narrowed in the width direction and that is positioned across the ventral region and crotch region. This allows the absorbent core to easily fit the pet's crotch region, even if the crotch region is narrow. Furthermore, in the pet diaper of [1] above, the effective region of the ventral elastic member is positioned so as to overlap the ventral end of the first constricted portion when viewed in the thickness direction. That is, the first constricted portion, which is partially narrowed in width in the absorbent core, fully extends to the portion facing the front (ventral side) of the pet when worn (the portion where the effective region of the ventral elastic member is located). This allows the relatively wide ventral end of the first constricted portion to be suitably attached to the pet's body, improving the fit of the absorbent core to the pet's body. As a result, urine can be effectively absorbed near the relatively wide ventral end of the first constricted portion (i.e., the portion of the absorbent core that fits closely to the pet's body as described above). Therefore, the pet diaper described in [1] above can effectively prevent urine leakage.

[0012] [2] A pet diaper according to [1], further comprising a pair of fixing members arranged in the ventral region on both sides of a center line passing through the center of the main body portion in the width direction and parallel to the longitudinal direction, each having a fixing portion that is fixed to the dorsal region in the worn state, wherein the ventral end of the first constriction is arranged in the ventral region so as to face the fixing portion of each of the pair of fixing members in the width direction.

[0013] According to the pet diaper of [2] above, when the pet diaper is put on a pet, the pair of fastening members allow the ventral end of the first constricted portion to be in good contact with the pet's body, thereby allowing urine to be more effectively absorbed near the relatively wider ventral end of the first constricted portion, thereby more effectively preventing urine leakage.

[0014] [3] A pet diaper according to [2], wherein the length of the fixing portion of each of the pair of fixing members in the longitudinal direction is longer than the distance between the ventral end of the absorbent core and the ventral end of the first constriction in the longitudinal direction.

[0015] According to the pet diaper [3] above, the fastening portion is sufficiently long in the longitudinal direction, allowing the fastening portion to be fastened to the back region with sufficient strength when the pet diaper is worn. This prevents the fastening portion from being unintentionally released from the back region, and allows the effective region of the ventral stretchable member to be appropriately stretched in the width direction (i.e., the effective region of the ventral stretchable member to be appropriately stretched). That is, when worn, the portion of the absorbent core between the ventral end of the absorbent core and the ventral end of the first constricted portion (the portion of the absorbent core that is wider than the first constricted portion) can be appropriately maintained in a fitted state to the pet's body. Therefore, this wider portion of the absorbent core can more effectively absorb urine, thereby more effectively preventing urine leakage.

[0016] [4] A pet diaper according to [2] or [3], wherein the width of the dorsal region in the width direction is narrower than the width of the ventral region in the width direction.

[0017] According to the pet diaper [4] above, when each fixing portion of a pair of fixing members is fixed to the back region, the proportion of the portion of the back region where the fixing portion is not fixed (for example, the portion between both ends of the back region in the width direction and the portion of the back region where the fixing portion is fixed) can be reduced, and as a result, slippage of the pet diaper when put on can be suppressed.

[0018] [5] A pet diaper according to any one of [1] to [4], wherein the width of the effective area of ​​the abdominal stretchable member in the width direction is wider than the width of the absorbent core in the width direction.

[0019] According to the pet diaper of [5] above, the width of the effective area of ​​the ventral stretchable member is relatively wide, which allows the ventral end of the first constricted portion to fit more closely to the pet's body, thereby more effectively absorbing urine near the ventral end of the first constricted portion and more effectively preventing urine leakage.

[0020] [6] A pet diaper according to [5], further comprising a pair of outer stretchable members that stretch in the longitudinal direction and are arranged outside the absorbent core in the width direction, wherein the width of the effective area of ​​the ventral stretchable member in the width direction is wider than the distance between the pair of outer stretchable members in the width direction.

[0021] According to the pet diaper of [6] above, the pair of outer elastic members improves the fit of the pet diaper to the pet's body. Furthermore, the relatively wide effective area of ​​the ventral elastic member allows the ventral end of the first constricted portion to fit the pet's body more effectively. Therefore, urine leakage can be more effectively prevented.

[0022] [7] A pet diaper according to any one of [1] to [5], further comprising a pair of outer stretchable members that stretch in the longitudinal direction and are arranged outside the absorbent core in the width direction, wherein the width of the effective area of ​​the ventral stretchable member in the width direction is narrower than the distance between the pair of outer stretchable members in the width direction, and both ends in the width direction of the effective area of ​​the ventral stretchable member are arranged inside the pair of outer stretchable members in the width direction.

[0023] According to the pet diaper [7] above, the effective area of ​​the ventral stretchable member can be prevented from interfering with the stretching of the pair of outer stretchable members, and the pair of outer stretchable members can be prevented from interfering with the stretching of the effective area of ​​the ventral stretchable member.

[0024] [8] A pet diaper according to any one of [1] to [7], wherein the width of the main body portion in the width direction is partially narrowed and the main body portion has a second constricted portion that defines a pair of openings through which the pet's hind legs are passed when the pet is worn, the second constricted portion has a narrowest portion where the width of the main body portion in the width direction is smallest, and the back end of the first constricted portion is positioned closer to the back than the narrowest portion.

[0025] According to the pet diaper of the above item [8], the absorbent core can easily conform to the pet's hind legs over a relatively wide area, thereby improving the fit of the pet diaper to the pet's body.

[0026] [9] A pet diaper according to any one of [1] to [8], wherein the back end of the first constricted portion is positioned on the ventral side of a center line that passes through the center of the main body portion in the longitudinal direction and is parallel to the width direction.

[0027] According to the pet diaper of [9] above, the absorbent core easily fits the crotch area of ​​the pet at the ventral part of the main body, which allows the absorbent core to fit the body of a medium- to large-sized dog (weighing approximately 12 kg to 25 kg) better, for example.

[0028]

[10] The pet diaper of any of [1] to [9], wherein the main body portion has a second constricted portion in which the width of the main body portion in the width direction is partially narrowed and which defines a pair of openings through which the pet's hind legs are passed when the pet is worn; the contraction rate of the ventral region in the width direction is higher than the contraction rate of the dorsal region in the width direction; the second constricted portion has a ventral portion disposed in the ventral region and a dorsal portion disposed in the dorsal region; and when an outer edge connecting the ventral end and the dorsal end of the ventral portion is defined as a first outer edge and an outer edge connecting the ventral end and the dorsal end of the dorsal portion is defined as a second outer edge, the ratio of the width of the first outer edge in the width direction to the length of the first outer edge in the longitudinal direction is greater than the ratio of the width of the second outer edge in the width direction to the length of the second outer edge in the longitudinal direction.

[0029] According to the pet diaper of

[10] , the contraction rate of the ventral region is relatively high, allowing the ventral region to fit the pet's body in an appropriate manner. Furthermore, the ratio of the width of the first outer edge in the width direction to the length of the first outer edge in the longitudinal direction is relatively large, allowing the ventral region to easily conform to the pet's hind legs. This improves the fit of the ventral region to the pet's body and effectively prevents urine leakage from the ventral region.

[0030]

[11] A pet diaper according to any one of [1] to

[10] , wherein the width of the main body portion in the width direction is partially narrowed, and the main body portion has a second constricted portion that defines a pair of openings through which the pet's hind legs are passed when the pet is worn, and a part of the outer edge of the back region located between the back end of the main body portion and the second constricted portion has a rounded shape.

[0031] According to the pet diaper of the above

[11] , the dorsal region easily conforms to the pet's back when worn, improving the fit of the dorsal region to the pet's body.

[0032] [Embodiments] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be designated by the same reference numerals, and duplicate explanations will be omitted. The drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional proportions are not limited to those shown in the drawings.

[0033] The configuration of a pet diaper 1 according to one embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a plan view of the pet diaper 1 as viewed from the skin side. FIG. 2 is a plan view of the pet diaper 1 as viewed from the non-skin side. FIGS. 1 and 2 show the pet diaper 1 in a stretched state in which the pet diaper 1 has been stretched to a state in which no wrinkles are formed. FIG. 3 is a diagram schematically illustrating the layered state of each component of the pet diaper 1 shown in FIG. 1. The pet diaper 1 is a diaper worn by a pet. In this specification, the term "pet" broadly includes vertebrates and invertebrates, and typically includes pet animals such as dogs, cats, rabbits, and hamsters. As an example, the pet diaper 1 is a diaper for use on medium- to large-sized dogs (dogs weighing approximately 12 kg to 25 kg).

[0034] In this embodiment, the "skin side" refers to the side that faces the pet's skin when the pet diaper 1 is worn on the pet. The "non-skin side" refers to the side that faces away from the pet's skin when the pet diaper 1 is worn on the pet. As shown in Fig. 1 , the pet diaper 1 has a longitudinal direction Y that connects the pet's belly side to its dorsal side, a width direction X that is perpendicular to the longitudinal direction Y and extends along the pet's waistline, and a thickness direction Z that is perpendicular to the longitudinal direction Y and the width direction X. As shown in Fig. 3 , the thickness direction Z is the layering direction of the materials that make up the pet diaper 1 (such as the topsheet 3, backsheet 4, and absorbent core 6, which will be described later).

[0035] 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 region 21 located on the ventral side of the pet when the diaper is worn, a dorsal region 22 located on the dorsal side of the pet when the diaper is worn, and a crotch region 23 located between the ventral region 21 and the dorsal region 22. The ventral region 21, the crotch region 23, and the dorsal region 22 are aligned in the longitudinal direction Y from the ventral side (front) to the dorsal side (rear) of the pet. As an example, if the main body portion 2 is divided into four equal parts in the longitudinal direction Y, the one region located most ventrally corresponds to the ventral region 21, the one region located most dorsally corresponds to the dorsal region 22, and the two regions located between the ventral region 21 and the dorsal region 22 (i.e., the center of the main body portion 2 in the longitudinal direction Y) correspond to the crotch region 23.

[0036] A pair of flap portions 24 protruding outward in the width direction X are formed on both sides in the width direction X of the ventral region 21 of the main body 2. Similarly, a pair of flap portions 25 protruding outward in the width direction X are formed on both sides in the width direction X of the dorsal region 22. A pair of fixing members 10, which will be described later, is provided on the pair of flap portions 24. A target portion 15, which will be described later, is provided in the region between the pair of flap portions 25.

[0037] The main body 2 has a constricted portion 27 (second constricted portion) where the width of the main body 2 in the width direction X is partially narrowed and defines a pair of openings 26 (see FIG. 4 ) through which the pet's hind legs are passed when the pet is wearing the carrier. The constricted portion 27 has a narrowest portion 27a where the width of the main body 2 in the width direction X is minimum. The width of the constricted portion 27 in the width direction X narrows continuously or stepwise from a ventral end 27b of the constricted portion 27 to the narrowest portion 27a. Similarly, the width of the constricted portion 27 in the width direction X narrows continuously or stepwise from a dorsal end 27c of the constricted portion 27 to the narrowest portion 27a. The narrowest portion 27a is located on the ventral side of a center line CL1 that passes through the center of the main body 2 in the longitudinal direction Y and is parallel to the width direction X. Near the end 27b, the width of the constricted portion 27 in the width direction X narrows sharply from the end 27b to the narrowest portion 27a. In contrast, near the end 27c, the width of the constricted portion 27 narrows gradually from the end 27c to the narrowest portion 27a.

[0038] The constricted portion 27 has a ventral portion 28 disposed in the ventral region 21 and a dorsal portion 29 disposed in the dorsal region 22. The ventral portion 28 defines the dorsal portion of the pair of flap portions 24, and the dorsal portion 29 defines the ventral portion of the pair of flap portions 25. When the outer edge connecting the ventral end 28a and the dorsal end 28b of the ventral portion 28 is defined as a first outer edge 28c, and the outer edge connecting the ventral end 29a and the dorsal end 29b of the dorsal portion 29 is defined as a second outer edge 29c, the ratio W11 / L11 of the width W11 of the first outer edge 28c in the width direction X to the length L11 of the first outer edge 28c in the longitudinal direction Y is greater than the ratio W12 / L12 of the width W12 of the second outer edge 29c in the width direction X to the length L12 of the second outer edge 29c in the longitudinal direction Y. That is, the magnitude relationship of "W11 / L11>W12 / L12" is satisfied. In the example of Fig. 1, the second outer edge 29c of the dorsal portion 29 is curved more gently than the first outer edge 28c of the ventral portion 28. The position of the ventral end 28a of the ventral portion 28 coincides with the position of the ventral end 27b of the constricted portion 27, and the position of the dorsal end 29b of the dorsal portion 29 coincides with the position of the dorsal end 27c of the constricted portion 27. The constricted portion 27 is formed, for example, by subjecting the main body 2 to R processing.

[0039] If the width of the ventral region 21 in the width direction X is width W1 and the width of the dorsal region 22 in the width direction X is width W2, the relationship "W1 > W2" holds. That is, the width W2 of the dorsal region 22 is narrower than the width W1 of the ventral region 21. Note that, as shown in FIG. 1 , when the widths of the ventral region 21 and the dorsal region 22 vary partially in the longitudinal direction Y, the maximum widths of the ventral region 21 and the dorsal region 22 in the width direction X are referred to as width W1 and width W2, respectively. In this embodiment, the width W1 of the ventral region 21 corresponds to the width of the ventral end 27b of the constricted portion 27 in the width direction X, and the width W2 of the dorsal region 22 corresponds to the width of the dorsal end 27c of the constricted portion 27 in the width direction X.

[0040] A portion 22a of the outer edge of the dorsal region 22, which is located between the dorsal end 2b of the main body 2 and the dorsal end 27c of the constricted portion 27, has a rounded shape. The portion 22a curves so as to be positioned inside the main body 2 as it approaches the end 2b of the main body 2 from the end 27c of the constricted portion 27. The portion 22a is formed, for example, by subjecting the dorsal region 22 to a rounding process. In this way, in the main body 2, the entire dorsal region 22 is subjected to a rounding process in order to form the constricted portion 27 and the portion 22a.

[0041] The main body portion 2 has a topsheet 3 , a backsheet 4 , a pair of leak-proof gathers 5 , and an absorbent core 6 .

[0042] The topsheet 3 is a liquid-permeable sheet that is positioned so as to face the pet's skin when the diaper is worn. The topsheet 3 may be formed, for example, from a liquid-permeable nonwoven or woven fabric, a synthetic resin film with liquid-permeable holes, or a composite sheet of these. The topsheet 3 is located approximately in the center of the main body 2 in the width direction X. The topsheet 3 is joined to the backsheet 4 and the absorbent core 6 with, for example, a hot-melt adhesive.

[0043] The backsheet 4 is a liquid-impermeable sheet that is placed on the side opposite the pet's skin when the diaper is worn. The backsheet 4 may be formed, for example, from a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet of these. In this embodiment, the backsheet 4 has a back film 41 and a back nonwoven fabric 42 that is placed on the non-skin side of the back film 41. The back nonwoven fabric 42 constitutes the outermost layer of the pet diaper 1. The back film 41 is bonded to the back nonwoven fabric 42 and the absorbent core 6 with, for example, a hot melt adhesive.

[0044] A pair of leak-proof gathers 5 are provided on the topsheet 3 and are arranged on both sides of a centerline CL2 that passes through the center of the main body portion 2 in the width direction X and is parallel to the longitudinal direction Y. Each of the pair of leak-proof gathers 5 includes a side sheet 51 and one or more (three in this embodiment) elastic members 52 arranged along the inner edge of the side sheet 51 in the width direction X. Note that the elastic members 52 are not shown in FIG. 1 . The side sheets 51 may be formed, for example, from a water-repellent or hydrophobic nonwoven fabric. Each side sheet 51 extends along the longitudinal direction Y from the ventral end 2a of the main body portion 2 to the dorsal end 2b of the main body portion 2. The inner portion of each side sheet 51 in the width direction X is folded back, and an elastic member 52 is arranged in the inner portion of the folded back side sheet 51. The elastic member 52 is joined to the side sheet 51 with a hot melt adhesive while stretched in the longitudinal direction Y from the ventral region 21 to the crotch region 23. The elastic member 52 is, for example, rubber thread.

[0045] Each side sheet 51 is partially joined to the topsheet 3 outside the absorbent core 6. As shown in FIGS. 1 and 3 , each side sheet 51 is joined to the topsheet 3 with, for example, a hot melt adhesive at fixing portions R1, R2, and R3, which are marked with diagonal hatching (see FIG. 1 ). The fixing portion R1 extends along the longitudinal direction Y from the ventral end 2a of the main body portion 2 to the dorsal end 2b of the main body portion 2. The fixing portions R2 and R3 are arranged more inward in the width direction X of the main body portion 2 than the fixing portion R1. The fixing portion R2 is arranged on the ventral side of the absorbent core 6, and the fixing portion R3 is arranged on the dorsal side of the absorbent core 6. Each of the fixing portions R2 and R3 is a group of multiple fixing portions (four in the example of FIG. 3 ) arranged at intervals from each other in the width direction X. Note that each of the fixing portions R2 and R3 may consist of a single fixing portion. Each side sheet 51 may be joined to the top sheet 3 by spiral coating of a hot melt adhesive. In this case, adjacent hot melt adhesives (adjacent fixing portions) may be independent of each other or may overlap each other.

[0046] The upstanding portion 51a is formed by the portion between the rear end of the fixed portion R2 and the ventral end of the fixed portion R3 (i.e., the portion of the side sheet 51 where the elastic member 52 is disposed and which is not joined to the topsheet 3). The upstanding portion 51a stands up due to contraction of the elastic member 52. As an example, the upstanding portion 51a is configured such that its both ends in the longitudinal direction Y are fixed by the fixed portions R2 and R3 and the upstanding portion 51a contracts in the longitudinal direction Y, thereby standing up with the inner end R1a of the fixed portion R1 in the width direction X as a fulcrum. In other words, the end R1a of the fixed portion R1 functions as an upstanding fulcrum for the upstanding portion 51a. By having the upstanding portion 51a stand up relative to the topsheet 3 in this way, leakage of pet urine excreted in the absorbent core 6 in the width direction X can be suppressed.

[0047] The absorbent core 6 is disposed between the topsheet 3 and the backsheet 4. The absorbent core 6 contains, for example, absorbent plant-derived pulp fibers and a polymeric absorbent (SAP) to absorb pet urine. The absorbent core 6, which is composed of the pulp fibers and SAP, can be held in place by being wrapped in a core wrap such as tissue (not shown). The absorbent core 6 may be an SAP sheet that does not contain pulp fibers and is primarily composed of SAP. The absorbent core 6 is disposed across the ventral region 21 and the crotch region 23, but is not disposed in the dorsal region 22. The absorbent core 6 has a ventral portion 61 disposed on the ventral side, a dorsal portion 62 disposed on the dorsal side, and a constricted portion 63 (first constricted portion) disposed between the ventral portion 61 and the dorsal portion 62.

[0048] The abdominal portion 61 includes the abdominal end 6a of the absorbent core 6 and is disposed in the abdominal region 21 of the main body portion 2. The dorsal portion 62 includes the dorsal end 6b of the absorbent core 6 and is disposed in the crotch region 23 of the main body portion 2. The constricted portion 63 is a portion of the absorbent core 6 where the width of the absorbent core 6 in the width direction X is partially narrowed, and is disposed across the abdominal region 21 and the crotch region 23. While the width of the constricted portion 63 varies in the longitudinal direction Y, the abdominal portion 61 and the dorsal portion 62 each have a constant width. In other words, the width of the abdominal portion 61 and the dorsal portion 62 in the width direction X is constant across the longitudinal direction Y. The length of the dorsal portion 62 in the longitudinal direction Y is longer than the length of the abdominal portion 61 in the longitudinal direction Y.

[0049] The constricted portion 63 has a narrowest portion 63a where the width of the absorbent core 6 in the width direction X is minimum. The width of the constricted portion 63 in the width direction X narrows continuously or stepwise from the ventral end 63b of the constricted portion 63 (the boundary between the ventral portion 61 and the constricted portion 63) to the narrowest portion 63a. Similarly, the width of the constricted portion 63 in the width direction X narrows continuously or stepwise from the dorsal end 63c of the constricted portion 63 (the boundary between the dorsal portion 62 and the constricted portion 63) to the narrowest portion 63a. The constricted portion 63 may have a wide portion whose width increases from the ventral end 63b to the narrowest portion 63a so that it is less than the width of the dorsal end 63b. Similarly, the constricted portion 63 may have a wide portion whose width increases from the dorsal end 63c to the narrowest portion 63a so that it is less than the width of the dorsal end 63c. In this way, the outer edge of the constricted portion 63 when viewed from the thickness direction Z may have a curved portion. The width of the constricted portion 63 in the width direction X gradually narrows from the ventral end 63 b to the narrowest portion 63 a, and rapidly narrows from the dorsal end 63 c to the narrowest portion 63 a. In this way, the constricted portion 63 is configured asymmetrically with respect to a center line that passes through the center of the constricted portion 63 in the longitudinal direction Y and is parallel to the width direction X.

[0050] The constricted portion 63 is located on the ventral side with respect to the center line CL1 of the main body portion 2. In other words, the narrowest portion 63a and the dorsal end portion 63c are located on the ventral side with respect to the center line CL1 of the main body portion 2. The position of the narrowest portion 63a of the constricted portion 63 in the longitudinal direction Y may be substantially the same as the position of the narrowest portion 27a of the constricted portion 27 in the longitudinal direction Y. Alternatively, the narrowest portion 63a of the constricted portion 63 may be located on the ventral side or dorsal side with respect to the narrowest portion 27a of the constricted portion 27. The dorsal end portion 63c is located dorsal to the narrowest portion 27a of the constricted portion 27. The length of the constricted portion 63 in the longitudinal direction Y is longer than the lengths of the ventral portion 61 and the dorsal portion 62 in the longitudinal direction Y.

[0051] The pet diaper 1 further comprises a ventral stretchable member 7, one or more (in this embodiment, three on each side, a total of six) outer stretchable members 8, a tail insertion portion 9, a pair of fixing members 10, and a target portion 15.

[0052] The abdominal-side stretchable member 7 is composed of, for example, rubber thread, flat rubber, or a composite material of these with nonwoven fabric. In this embodiment, the abdominal-side stretchable member 7 has multiple (nine in this embodiment) rubber threads 71 ​​and nonwoven fabric 72 sandwiching the rubber threads 71 ​​in the thickness direction Z. The multiple rubber threads 71 ​​are arranged at equal intervals in the longitudinal direction Y and extend along the width direction X. The nonwoven fabric 72 is composed of a single sheet of nonwoven fabric folded in half and has a first portion 72a positioned on the skin side of the rubber thread 71 and a second portion 72b positioned on the non-skin side of the rubber thread 71. The first portion 72a and the second portion 72b each have a rectangular shape that is long in the width direction X and have the same size. The first portion 72a and the second portion 72b may have different sizes. The ventral end of the nonwoven fabric 72 corresponds to the ventral end of the ventral-side stretchable member 7, and the dorsal end of the nonwoven fabric 72 corresponds to the dorsal end of the ventral-side stretchable member 7. Note that the nonwoven fabric 72 may be composed of a first portion 72a and a second portion 72b that are separate from each other.

[0053] The ventral-side stretchable member 7 has an effective region 73 that is stretchable in the width direction X. In the effective region 73, the central portion (jointed portion 71 a) of each rubber thread 71 is joined to the nonwoven fabric 72 with a hot melt adhesive while stretched in the width direction X. In this embodiment, the effective region 73 is a rectangular region surrounded by two straight lines connecting both ends of the jointed portion 71 a of each rubber thread 71 along the longitudinal direction Y (the straight lines corresponding to both end portions 73 c of the effective region 73 shown in FIG. 1 ), the ventral end of the ventral-side stretchable member 7 (nonwoven fabric 72), and the dorsal end of the ventral-side stretchable member 7 (nonwoven fabric 72). Note that if both ends of the jointed portion 71 a of each rubber thread 71 are not positioned on a straight line along the longitudinal direction Y (i.e., if the positions of both ends of the jointed portion 71 a of each rubber thread 71 in the width direction X vary), the ends of the jointed portion 71 a that are positioned outermost in the width direction X are defined as both end portions 73 c of the effective region 73. 1, the effective area 73 is shown as an area surrounded by a thick dotted line. When the abdominal-side stretchable member 7 is made of flat rubber, the effective area 73 is the flat rubber itself.

[0054] The abdominal-side stretchable member 7 has an ineffective region 74. In the ineffective region 74, the rubber threads 71 ​​are not bonded to the nonwoven fabric 72. In other words, the elastic force of the rubber threads 71 ​​does not act on the ineffective region 74, and therefore the ineffective region 74 does not contribute to the stretchability of the main body 2. In this embodiment, the ineffective region 74 is a region of the abdominal-side stretchable member 7 that extends on both sides of the effective region 73 in the width direction X.

[0055] The effective region 73 stretches in the width direction X, thereby imparting stretchability to the abdominal region 21 of the main body portion 2. The effective region 73 is located in the abdominal region 21 of the main body portion 2, and is located on the abdominal side of the abdominal end 27b of the constricted portion 27 of the main body portion 2. The abdominal-side stretchable member 7 is joined to the main body portion 2 with a hot melt adhesive while the effective region 73 is stretched in the width direction X. A portion of the abdominal-side stretchable member 7 that is positioned to overlap with the absorbent core 6 is joined to the absorbent core 6 and the backsheet 4, and a portion of the abdominal-side stretchable member 7 that is not positioned to overlap with the absorbent core 6 is joined to the topsheet 3 and the backsheet 4. As a result, when the effective region 73 stretches in the width direction X, the abdominal region 21 of the main body portion 2 stretches in the width direction X together with the abdominal-side stretchable member 7 (effective region 73).

[0056] When viewed from the thickness direction Z, the effective region 73 is positioned so as to overlap the entire ventral portion 61 and a portion of the constricted portion 63, including the ventral end 63b. That is, when viewed from the thickness direction Z, the effective region 73 is positioned so as to overlap the ventral end 63b of the constricted portion 63. The ventral end 73a of the effective region 73 (corresponding to a part of the ventral end of the ventral stretchable member 7) is positioned on the ventral side of the ventral end 6a of the absorbent core 6, and the dorsal end 73b of the effective region 73 (corresponding to a part of the dorsal end of the ventral stretchable member 7) is positioned on the dorsal side of the ventral end 63b of the constricted portion 63. However, the dorsal end 73b of the effective region 73 may overlap the ventral end 63b of the constricted portion 63 when viewed from the thickness direction Z. That is, the end 73b of the effective region 73 may be positioned directly above the ventral end 63b of the constricted portion 63.

[0057] The ventral end 73a of the effective region 73 may be located on the dorsal side relative to the ventral end 6a of the absorbent core 6. The effective region 73 may be located in the ventral region 21 so that the dorsal end 73b of the effective region 73 is located on the dorsal side relative to the ventral end 27b of the constricted portion 27. In this case, the ventral-side stretchable member 7 may be subjected to R processing together with the main body portion 2.

[0058] In this embodiment, an effective region 73 of the ventral stretchable member 7 that stretches in the width direction X is disposed in the ventral region 21, and no stretchable member that stretches in the width direction X is disposed in the dorsal region 22. For this reason, the contraction rate of the ventral region 21 in the width direction X is higher than the contraction rate of the dorsal region 22 in the width direction X. If the width of the ventral region 21 (dorsal region 22) in the natural width direction X is WA, and the width of the ventral region 21 (dorsal region 22) in a stretched state in which it is stretched in the width direction X to a state where no wrinkles are formed is WB, the contraction rate [%] of the ventral region 21 (dorsal region 22) in the width direction X is expressed as (WB-WA) / WB×100.

[0059] The multiple outer stretchable members 8 extend along the longitudinal direction Y throughout the entire main body 2 and are stretchable in the longitudinal direction Y. Each outer stretchable member 8 is made of an elastic material such as rubber thread. The outer stretchable members 8 are disposed outside the absorbent core 6 in the width direction X. When viewed from the thickness direction Z, the outer stretchable members 8 are disposed in positions overlapping the effective region 73 of the ventral stretchable member 7. In the example shown in FIG. 1 , three outer stretchable members 8 are disposed on one side in the width direction X, and the other three outer stretchable members 8 are disposed on the other side in the width direction X. As shown in FIG. 3 , the outer stretchable members 8 are disposed between the side sheet 51 and the back sheet 4 and are bonded to the side sheet 51 and the back sheet 4 with hot melt adhesive while stretched in the longitudinal direction Y. As shown in FIG. 4 , when worn, the multiple outer stretchable members 8 contract in the longitudinal direction Y, allowing the openings 26 of the main body 2 to fit around the legs of the pet P. The outer stretchable members 8 do not necessarily overlap the effective region 73. For example, a plurality of outer elastic members 8 may be arranged on the back side of the effective region 73 .

[0060] The width W3 of the effective region 73 in the width direction X is wider than the width W4 ( FIG. 2 ) of the absorbent core 6 in the width direction X. The width W3 of the effective region 73 is also wider than the distance D1 between the pair of outer stretchable members 8 located outermost in the width direction X among the multiple outer stretchable members 8. In other words, both ends 73c of the effective region 73 in the width direction X are located outer than the multiple outer stretchable members 8. The center of the effective region 73 of the ventral stretchable member 7 in the width direction X is the same as the center of the pair of outer stretchable members 8 in the width direction X, and these centers are located on the center line CL2 of the main body portion 2. The center of the effective region 73 of the ventral stretchable member 7 in the width direction X and the center of the pair of outer stretchable members 8 in the width direction X may each be slightly offset from the center line CL2 of the main body portion 2. Note that, when multiple outer stretchable members 8 are located on both sides of the absorbent core 6 as shown in FIG. 1 , the distance D1 is the distance between the pair of outermost outer stretchable members 8, as described above. Furthermore, when the width of the effective area 73 and the absorbent core 6 varies partially in the longitudinal direction Y, the maximum width of the effective area 73 and the absorbent core 6 in the width direction X will be referred to as width W3 and width W4, respectively.

[0061] The tail insertion portion 9 is a hole formed in the main body portion 2 for inserting a pet's tail. The tail insertion portion 9 is composed of one cutout 9a and two cutouts 9b. The cutouts 9a and 9b penetrate the main body portion 2 in the thickness direction Z. The cutout 9a is provided in the center of the crotch region 23 in the width direction X, in a region on the back side of the absorbent core 6. The cutout 9a extends in the width direction X across the center line CL2 and has a curved (arcuate) shape that is convex toward the back side. The two cutouts 9b are provided on both sides of the center line CL2, at positions closer to the cutout 9a and on the back side of the cutout 9a. The two cutouts 9b have linear shapes that are inclined with respect to the longitudinal direction Y so that the distance between the two cutouts 9b increases from the ventral side to the back side.

[0062] By pushing the portion between the ends of the cutouts 9a in the width direction X and closer to the ventral side than the cutouts 9a toward the non-skin side, the tongue T is folded back toward the non-skin side, and the tongue T is positioned on the ventral side of the tail. This creates a substantially semicircular opening for inserting the pet's tail. Furthermore, by tearing the portion of the main body 2 between the cutout 9a and the two cutouts 9b, the cutout 9a and the two cutouts 9b can be connected. In this case, as shown in FIG. 2, it is possible to form an opening with an area A larger than the opening formed by the cutout 9a. Thus, in this embodiment, the tail insertion portion 9 is configured so that the opening size can be adjusted (enlarged) by connecting the two cutouts 9b to the cutout 9a as needed. Note that the shape and size of the tail insertion portion 9 are not limited to those of this embodiment. For example, if size adjustment is not necessary, the cutout 9b may be omitted. Furthermore, the tail insertion section 9 may be formed by an opening having a predetermined area instead of a notch, or may be formed by a combination of an opening and a notch.

[0063] The fixing members 10 are arranged on both sides of the center line CL2 in the ventral region 21. Each fixing member 10 is arranged in a relatively wide portion of the ventral region 21 (a portion including the ventral end 27b of the constricted portion 27). This portion has a constant width W1 in the width direction X. Each fixing member 10 extends outward in the width direction X from the flap portion 24. Each fixing member 10 has a rectangular shape that is elongated in the width direction X and is arranged near the ventral end 2a of the main body portion 2. Each fixing member 10 includes a base sheet 11 joined to the flap portion 24 and a fixing portion 12 provided on the skin-facing surface of the base sheet 11. A portion of the base sheet 11 is sandwiched, for example, between the side sheet 51 and the back sheet 4. The fixing portion 12 is, for example, a hook-and-loop fastener (e.g., multiple hook-shaped members) configured to be engageable with the target portion 15.

[0064] The target portion 15 is disposed in the back region 22, and each of the fixing portions 12 of the pair of fixing members 10 is fixed thereto. The target portion 15 is disposed in a relatively wide portion of the back region 22 (a portion including the back-side end 27c of the constricted portion 27). The target portion 15 is provided in the region between the pair of flap portions 25. The target portion 15 has a rectangular shape that is elongated in the width direction X, and is disposed on the non-skin-side surface of the back sheet 4 (back nonwoven fabric 42) near the back-side end 2b of the main body portion 2. Note that if the non-skin-side surface of the back sheet 4 is configured to be engageable with the fixing portions 12, each fixing member 10 may be directly engaged with the non-skin-side surface of the back sheet 4 (back nonwoven fabric 42). In this case, the pet diaper 1 does not need to include the target portion 15.

[0065] The ventral end 63b of the constricted portion 63 is disposed in the ventral region 21 so as to face the fixing portion 12 of each of the pair of fixing members 10 in the width direction X. In the example of Fig. 1, the fixing portion 12 of each of the pair of fixing members 10 faces substantially the entire ventral portion 61 of the absorbent core 6 in the width direction X.

[0066] The length L1 of the fixing portion 12 of each of the pair of fixing members 10 in the longitudinal direction Y is longer than the distance D2 ( FIG. 2 ) between the ventral end 6a of the absorbent core 6 and the ventral end 63b of the constricted portion 63 in the longitudinal direction Y. The length L1 of the fixing portion 12 corresponds to the maximum length of the fixing member 10 in the longitudinal direction Y. The distance D2 corresponds to the length of the ventral portion 61 of the absorbent core 6 in the longitudinal direction Y. The length L2 of the target portion 15 in the longitudinal direction Y is longer than the length L1 of the fixing portion 12. Note that the length L1 of the fixing portion 12 may be equal to or longer than the length L2 of the target portion 15, and as an example, the length L1 of the fixing portion 12 may be the same as the length L2 of the target portion 15.

[0067] 4 is a diagram showing an example of how the pet diaper 1 is worn. When putting the pet diaper 1 on a pet P, first, the pet P's tail is passed through the tail insertion portion 9 and exposed to the non-skin side of the diaper. At this time, the tongue T is folded back to the non-skin side so that the tongue T is positioned on the ventral side of the tail. Next, the ventral region 21 of the main body portion 2 is placed against the pet P's belly. Then, the crotch region 23 of the main body portion 2 is placed against the pet P's urination opening (near the crotch), while the dorsal region 22 of the main body portion 2 is placed against the pet P's back. Next, the pair of fixing members 10 are pulled in the waist direction toward the back of the pet P, and the fixing portions 12 of the pair of fixing members 10 are fastened to the outer surface of the target portion 15 of the main body portion 2. At this time, a pair of openings 26 (one of which is not shown) are defined by the constricted portion 27 of the main body portion 2, and the pet P's hind legs PL are passed through the openings 26.

[0068] [Effects] In the pet diaper 1 described above, as shown in FIGS. 1 and 2 , the absorbent core 6 has a constricted portion 63 that is partially narrowed in the width direction X and that extends across the ventral region 21 and the crotch region 23. This allows the absorbent core 6 to easily fit the pet's crotch region (crotch area) even when the crotch area is narrow. Furthermore, the effective region 73 of the ventral stretchable member 7 is positioned so as to overlap the ventral end 63b of the constricted portion 63 when viewed from the thickness direction Z. That is, the constricted portion 63, which is partially narrowed in the absorbent core 6, fully extends to the portion facing the front (ventral side) of the pet when worn (the portion where the effective region 73 of the ventral stretchable member 7 is provided). This allows the relatively wide ventral end 63b of the constricted portion 63 to be suitably attached to the pet's body, improving the fit of the absorbent core 6 to the pet's body. As a result, urine can be effectively absorbed near the relatively wide ventral end 63b of the constricted portion 63 (i.e., the portion of the absorbent core 6 that closely fits the pet's body as described above). Therefore, the pet diaper 1 can effectively prevent urine leakage.

[0069] 1 and 2 , the ventral end 63b of the constricted portion 63 is disposed in the ventral region 21 so as to face each of the fastening portions 12 of the pair of fastening members 10 in the width direction X. According to the above configuration, when the pet diaper 1 is put on a pet by the pair of fastening members 10, the ventral end 63b of the constricted portion 63 can be suitably fitted to the pet's body. Therefore, urine can be more effectively absorbed near the relatively wide ventral end 63b of the constricted portion 63, and as a result, urine leakage can be more effectively suppressed.

[0070] 1 and 2 , the length L1 of the fixed portion 12 of each of the pair of fixing members 10 in the longitudinal direction Y is longer than the distance D2 between the ventral end 6a of the absorbent core 6 and the ventral end 63b of the constricted portion 63 in the longitudinal direction Y. According to the above configuration, the fixed portions 12 are sufficiently long in the longitudinal direction Y, so that the fixed portions 12 can be fixed to the back region 22 with sufficient fixing strength when the pet diaper 1 is put on. This prevents the fixation between the fixed portions 12 and the back region 22 from being unintentionally released, and allows the effective region 73 of the ventral stretchable member 7 to be appropriately maintained in a state where it is pulled in the width direction X (i.e., a state where the effective region 73 of the ventral stretchable member 7 is stretched). That is, in the worn state, the ventral portion 61 (a portion of the absorbent core 6 that is wider than the constricted portion 63) between the ventral end 6a of the absorbent core 6 and the ventral end 63b of the constricted portion 63 can be kept properly fitted to the pet's body. Therefore, urine can be more effectively absorbed by the wider ventral portion 61 of the absorbent core 6, and as a result, urine leakage can be more effectively prevented.

[0071] 1 , the width W2 of the dorsal region 22 in the width direction X is narrower than the width W1 of the ventral region 21 in the width direction X. According to the above configuration, when the fixing portions 12 of the pair of fixing members 10 are fixed to the target portions 15, the proportion of the portion of the dorsal region 22 to which the fixing portions 12 are not fixed (e.g., the portion between the both ends of the dorsal region 22 in the width direction X and the target portions 15) can be reduced, and as a result, slippage of the pet diaper 1 when worn can be suppressed.

[0072] 1 and 2, the width W3 of the effective region 73 of the ventral-side stretchable member 7 in the width direction X is wider than the width W4 of the absorbent core 6 in the width direction X. With the above configuration, the width W3 of the effective region 73 of the ventral-side stretchable member 7 is relatively wide, so that the ventral end 63b of the constricted portion 63 can be more suitably fitted to the pet's body. Therefore, urine can be more effectively absorbed near the ventral end 63b of the constricted portion 63, and as a result, urine leakage can be more effectively prevented.

[0073] As shown in Fig. 1, the width W3 of the effective region 73 of the ventral stretchable member 7 in the width direction X is wider than the distance D1 between the pair of outer stretchable members 8 that are located outermost in the width direction X among the plurality of outer stretchable members 8. According to the above configuration, the plurality of outer stretchable members 8 can improve the fit of the pet diaper 1 to the pet's body. Furthermore, because the width W3 of the effective region 73 of the ventral stretchable member 7 is relatively wide, the ventral end 63b of the constricted portion 63 can be more suitably fitted to the pet's body. Therefore, urine leakage can be more effectively suppressed.

[0074] 1, the rear end 63c of the constricted portion 63 is located rearward of the narrowest portion 27a of the constricted portion 27. This configuration allows the absorbent core 6 to easily conform to the pet's hind legs over a relatively wide area, thereby improving the fit of the pet diaper 1 to the pet's body.

[0075] 1, the back end 63c of the constricted portion 63 is located on the ventral side of the center line CL1 of the main body 2. With this configuration, the absorbent core 6 can easily fit along the crotch area of ​​the pet in the ventral part of the main body 2. This allows the absorbent core 6 to further improve the fit to the body of a medium to large dog (a dog weighing approximately 12 kg to 25 kg), for example.

[0076] As shown in FIG. 1 , the contraction rate of the ventral region 21 in the width direction X is higher than that of the dorsal region 22 in the width direction X, and the ratio W11 / L11 of the width W11 of the first outer edge 28c in the width direction X to the length L11 of the first outer edge 28c in the longitudinal direction Y is greater than the ratio W12 / L12 of the width W12 of the second outer edge 29c in the width direction X to the length L12 of the second outer edge 29c in the longitudinal direction Y. With the above configuration, the contraction rate of the ventral region 21 is relatively high, allowing the ventral region 21 to fit snugly against the pet's body. Furthermore, the ratio W11 / L11 at the ventral portion 28 of the constricted portion 27 is relatively large, allowing the ventral region 21 to easily conform to the pet's hind legs. This improves the fit of the ventral region 21 to the pet's body and effectively prevents urine leakage from the ventral region 21.

[0077] 5 and 6 , the pet diaper 1 of this embodiment is compared with a conventional pet diaper 1A to further explain the above-mentioned effects. The pet diaper 1A has a main body portion 2A having a different shape from the main body portion 2 described above. The main body portion 2A has an absorbent core 6A having a different shape from the absorbent core 6 described above. In FIG. 5 , when the main body portion 2 is placed on the main body portion 2A, the portions of the main body portion 2A that do not overlap with the main body portion 2 are hatched in a dot pattern. Furthermore, when the absorbent core 6 is placed on the absorbent core 6A, the portions of the absorbent core 6A that do not overlap with the absorbent core 6 are hatched in a grid pattern. Unlike the absorbent core 6, the absorbent core 6A does not have a constricted portion. In other words, the absorbent core 6A is formed to have a substantially uniform width throughout the entire area in the longitudinal direction Y.

[0078] The main body 2A has a constricted portion 27A where the width of the main body 2A in the width direction X is partially narrowed. The constricted portion 27A has a ventral portion 28A located in the ventral region 21 and a dorsal portion 29A located in the dorsal region 22. In the pet diaper 1, the ratio W11 / L11 in the ventral portion 28 is greater than the ratio W12 / L12 in the dorsal portion 29 (see FIG. 1 ), whereas in the pet diaper 1A, the ratio in the ventral portion 28A (corresponding to the ratio W11 / L11) is substantially the same as the ratio in the dorsal portion 29A (corresponding to the ratio W12 / L12). In the main body 2A, the outer edge of the ventral portion 28A is gently curved to the same extent as the outer edge of the dorsal portion 29A.

[0079] In the pet diaper 1, a portion 22a of the outer edge of the back region 22 has a rounded shape, whereas in the pet diaper 1A, a portion 22Aa of the outer edge of the back region 22, which is located between the back end 2Ab of the main body 2A and the back end 27Ac of the constricted portion 27A, has a linear shape parallel to the longitudinal direction Y. In other words, the back region 22 of the main body 2 is entirely rounded, whereas the back region 22 of the main body 2A is only partially rounded.

[0080] As shown in Figure 6(a), when the pet diaper 1A is being worn, the ratio (corresponding to the ratio W11 / L11) in the abdominal portion 28A is relatively small, so the constricted portion 27A easily catches on the inner thighs of the hind legs PL of the pet P. This makes it difficult for the opening 26 of the main body portion 2A to fit around the legs of the pet P. On the other hand, as shown in Figure 6(b), when the pet diaper 1 is being worn, the ratio W11 / L11 (see Figure 1) in the abdominal portion 28 is relatively large, so the constricted portion 27 does not easily catch on the inner thighs of the hind legs PL of the pet P. This makes it easy for the opening 26 of the main body portion 2 to fit around the legs of the pet P, thereby improving the fit of the abdominal region 21 to the pet's body.

[0081] The pet diaper 1 is typically placed on a medium- to large-sized dog (a dog weighing approximately 12 kg to 25 kg). Medium- to large-sized dogs tend to have relatively thick hind legs, but their crotch area (between the legs) may be narrow, similar to that of small dogs. In this case, when a conventional pet diaper 1A is placed on a medium- to large-sized dog, the pet diaper 1A does not fit well around the legs, as described above. Furthermore, the absorbent core 6A, which is formed to have a substantially uniform width, does not easily conform to the crotch area. In contrast, when the pet diaper 1 is placed on a medium- to large-sized dog, the pet diaper 1 easily fits around the legs, as described above. Furthermore, the absorbent core 6A has a constricted portion 63, which allows the absorbent core 6 to easily conform to the crotch area. Thus, the pet diaper 1 is particularly suitable for medium- to large-sized dogs.

[0082] 1, 5, and 6(b), a portion 22a of the outer edge of the back region 22, which is located between the back end 2b of the main body 2 and the constricted portion 27, has a rounded shape. This configuration allows the back region 22 to easily conform to the pet's back when worn, improving the fit of the back region 22 to the pet's body. As shown in FIG. 6(a), in the conventional pet diaper 1A, a portion 22Aa of the outer edge of the back region 22 has a linear shape, which may make it difficult for the corners of the back region 22 to conform to the pet's back.

[0083] [Modifications] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. The materials and shapes of each component are not limited to those described above, and various materials and shapes can be used. Furthermore, some components of the pet diaper 1 described above may be modified to other configurations or omitted.

[0084] In the above embodiment, the width W3 of the effective area 73 of the abdominal side stretchable member 7 is wider than the distance D1 between the pair of outer stretchable members 8, but the width W3 of the effective area 73 of the abdominal side stretchable member 7 may be narrower than the distance D1 between the pair of outer stretchable members 8. Furthermore, both end portions 73c of the effective area 73 in the width direction X may be positioned more inward than the pair of outer stretchable members 8 in the width direction X. With the above configuration, the effective area 73 of the abdominal side stretchable member 7 is prevented from interfering with the expansion and contraction of the outer stretchable members 8, and the outer stretchable members 8 are prevented from interfering with the expansion and contraction of the effective area 73 of the abdominal side stretchable member 7.

[0085] In the above embodiment, the tail insertion portion 9 is provided in an area dorsal to the absorbent core 6, but the absorbent core 6 may extend dorsal to the tail insertion portion 9 so as not to interfere with it. That is, the tail insertion portion 9 may be provided on the ventral side of the dorsal end 6b of the absorbent core 6. In this case, the absorbent core 6 may be formed so as to surround the area where the tail insertion portion 9 is provided when viewed from the thickness direction Z. For example, when viewed from the thickness direction Z, the absorbent core 6 may have an opening area formed therein that corresponds to the area where the tail insertion portion 9 is provided. Furthermore, in the above embodiment, when the pet's tail is inserted through the tail insertion portion 9, the tongue T is folded back toward the skin and positioned on the ventral side of the tail, but the tail insertion portion 9 may also be configured so that the tongue T is positioned on the dorsal side of the tail.

[0086] In the above embodiment, each fixing member 10 extends outward in the width direction X from the flap portion 24, but each fixing member 10 (fixing portion 12) does not have to extend outward from the flap portion 24. For example, the fixing portion 12 may be provided along the outer edge of the flap portion 24 in the width direction X.

[0087] In the above embodiment, the abdominal side stretchable member 7 has an active region 73 and an inactive region 74, but the abdominal side stretchable member 7 does not have to have an inactive region 74. In other words, the rubber thread 71 stretched in the width direction X may be joined to the nonwoven fabric 72 over the entire area of ​​the abdominal side stretchable member 7 in the width direction X.

[0088] 1...pet diaper, 2...main body portion, 2b...end portion, 6...absorbent core, 6a...end portion, 7...ventral stretchable member, 8...outer stretchable member, 10...fixing member, 12...fixing portion, 15...target portion, 21...ventral region, 22...dorsal region, 23...crotch region, 26...opening, 27...constricted portion (second constricted portion), 27a...narrowest portion, 28...ventral portion, 28a, 28b...end portion, 28c...first outer edge, 29...dorsal portion, 29a, 29b...end portion, 29c...second outer edge, 63...constricted portion (first constricted portion), 63b...ventral end portion, 63c...dorsal end portion, 73...effective region.

Claims

1. A pet diaper to be put on a pet so as to cover at least the pet's waist, the pet diaper having a main body portion including an absorbent core, the main body portion including a ventral region that is located on the ventral side of the pet when the pet diaper is put on the pet, a dorsal region that is located on the dorsal side of the pet when the pet diaper is put on the pet, and a crotch region that is located between the ventral region and the dorsal region, arranged along the longitudinal direction; and a ventral stretchable member that stretches in a width direction perpendicular to the longitudinal direction and has an effective region that is located in the ventral region, the absorbent core having a partially narrowed width in the width direction and having a first constricted portion that is located across the ventral region and the crotch region, the effective region of the ventral stretchable member being positioned so as to overlap the ventral end of the first constricted portion when viewed from a thickness direction that is perpendicular to the longitudinal direction and the width direction.

2. A pet diaper as described in claim 1, further comprising a pair of fixing members arranged in the ventral region on both sides of a center line that passes through the center of the main body portion in the width direction and is parallel to the longitudinal direction, each having a fixing portion that is fixed to the dorsal region in the worn state, and wherein the ventral end of the first constricted portion is arranged in the ventral region so as to face the fixing portion of each of the pair of fixing members in the width direction.

3. A pet diaper as described in claim 2, wherein the length of the fixing portion of each of the pair of fixing members in the longitudinal direction is longer than the distance between the ventral end of the absorbent core and the ventral end of the first constriction in the longitudinal direction.

4. The pet diaper according to claim 2, wherein the width of the dorsal region in the width direction is narrower than the width of the ventral region in the width direction.

5. The pet diaper according to claim 1, wherein the width of the effective region of the abdominal-side stretchable member in the width direction is wider than the width of the absorbent core in the width direction.

6. A pet diaper as described in claim 5, further comprising a pair of outer elastic members that stretch in the longitudinal direction and are positioned outside the absorbent core in the width direction, wherein the width of the effective area of ​​the ventral elastic member in the width direction is wider than the distance between the pair of outer elastic members in the width direction.

7. A pet diaper as described in claim 1, further comprising a pair of outer stretchable members that stretch in the longitudinal direction and are arranged outside the absorbent core in the width direction, wherein the width of the effective area of ​​the ventral stretchable member in the width direction is narrower than the distance between the pair of outer stretchable members in the width direction, and both ends of the effective area of ​​the ventral stretchable member in the width direction are arranged inside the pair of outer stretchable members in the width direction.

8. A pet diaper as described in claim 1, wherein the main body portion has a second constricted portion that partially narrows the width of the main body portion in the width direction and defines a pair of openings through which the pet's hind legs are passed when the diaper is worn, the second constricted portion has a narrowest portion where the width of the main body portion in the width direction is at its smallest, and the back end of the first constricted portion is positioned on the back side of the narrowest portion.

9. A pet diaper as described in claim 1, wherein the back end of the first constricted portion is positioned on the ventral side of a center line that passes through the center of the main body portion in the longitudinal direction and is parallel to the width direction.

10. The pet diaper of claim 1, wherein the main body portion has second constricted portions where the width of the main body portion in the width direction is partially narrowed and which define a pair of openings through which the pet's hind legs are passed when the pet is worn, the contraction rate of the ventral region in the width direction is higher than the contraction rate of the dorsal region in the width direction, the second constricted portion has a ventral portion disposed in the ventral region and a dorsal portion disposed in the dorsal region, and when the outer edge connecting the ventral end and the dorsal end of the ventral portion is defined as a first outer edge and the outer edge connecting the ventral end and the dorsal end of the dorsal portion is defined as a second outer edge, the ratio of the width of the first outer edge in the width direction to the length of the first outer edge in the longitudinal direction is greater than the ratio of the width of the second outer edge in the width direction to the length of the second outer edge in the longitudinal direction.

11. A pet diaper as described in claim 1, wherein the main body portion has a second constricted portion in which the width of the main body portion in the width direction is partially narrowed and which defines a pair of openings through which the pet's hind legs are passed when the main body portion is worn, and a portion of the outer edge of the dorsal region located between the dorsal end of the main body portion and the second constricted portion has a rounded shape.

Images