Cloth diaper cover and diaper cover

Abstract

Provided is a cloth diaper cover (1) to be used in conjunction with an absorbent pad or a diaper, the cloth diaper cover (1) comprising an abdomen-side stretching section (21) that is disposed, in a spread and extended state, at an abdomen-side end section in a longitudinal direction and at a central section in a width direction, and that can stretch in the longitudinal direction and width direction; and a pair of abdomen-side low-stretching sections (22, 23) that are disposed side-by-side in the width direction. The abdomen-side low-stretching sections (22, 23) are adjacent on the back side to the abdomen-side stretching section (21). The average value of force required to expand a longitudinal unit length of the abdomen-side stretching section (21) for a prescribed length in the width direction is less than the average value of force required to expand a longitudinal unit length of the abdomen-side low-stretch sections (22, 23) for the prescribed length in the width direction. At least portions of boundaries between the abdomen-side stretching section (21) and the abdomen-side low-stretching sections (22, 23) are angled obliquely from the end section to the center section in the width direction and from the abdomen side to the back side in the longitudinal direction.

Description

Cloth diaper covers and diaper covers

[0001] The present invention relates to a cloth diaper cover and a diaper cover.

[0002] Diaper covers are known that are fitted with an absorbent pad in the crotch area to absorb urine and other excrement. The disposable diaper disclosed in Patent Document 1 has a front waist region that includes an elastic yarn region and a non-elastic yarn region closer to the waist. The non-elastic yarn region includes a stretchable sheet but no elastic yarn, making it less prone to unevenness and easier to wipe the wearer's skin. Furthermore, the entire front waist region stretches in the width direction, allowing the front waist region to fit snugly against the wearer's skin. Providing stretchability to the front waist region of the diaper cover also enhances the fit around the wearer's waist.

[0003] Patent No. 6553165

[0004] However, the wearer's abdomen is rounded, moves easily with breathing, and expands with eating, drinking, and excretion. Therefore, if the entire front waist area of ​​the diaper cover is stretchable, as in the disposable diaper of Patent Document 1, and this stretchability is limited to the width direction, the diaper cover will easily slip down from the top of the wearer's abdomen to the narrower areas below. On the other hand, if the waist area is too stretchy in order to prevent the diaper cover from slipping, the comfort of wearing the diaper cover will be reduced.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a cloth diaper cover and a diaper cover that are comfortable to wear while preventing the diaper cover from slipping down from the wearer's abdomen.

[0006] The main invention for achieving the above object is a cloth diaper cover to be used in combination with an absorbent pad or a diaper, which, in an unfolded and stretched state, has longitudinal, width, and thickness directions that are perpendicular to one another, and has a ventral stretchable section that is provided at the ventral end in the longitudinal direction and at the center in the width direction and is stretchable in the longitudinal and width directions, and a pair of ventral low-stretch sections lined up in the width direction, wherein the ventral low-stretch sections are adjacent to the ventral stretchable section from the dorsal side in the longitudinal direction, the average value of the force required to stretch the ventral stretchable section of a unit length in the longitudinal direction to a specified length in the width direction is smaller than the average value of the force required to stretch the ventral low-stretch section of a unit length in the longitudinal direction to the specified length in the width direction, and at least a part of the boundary between the ventral stretchable section and the ventral low-stretch section is inclined from the ventral side to the dorsal side in the longitudinal direction from the end in the width direction to the center. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0007] According to the present invention, it is possible to provide a cloth diaper cover and a diaper cover that are comfortable to wear while preventing slipping down from the abdomen of the wearer.

[0008] 1A and 1B are plan views of the diaper cover 1 in an unfolded and stretched state as seen from the skin side. FIG. 1B is a plan view of the diaper cover 1 in an unfolded and stretched state as seen from the non-skin side. FIG. 1C is a schematic perspective view of the diaper cover 1 in a worn state. FIG. 1D is a schematic rear view of the diaper cover 1 in a worn state. FIG. 1E is a schematic side view of the diaper cover 1 in a worn state. FIG. 1F is a plan view of the abdominal portion 1A of the diaper cover 1 in an unfolded and stretched state. FIG. 7A and FIG. 7B are explanatory diagrams of a pants-type diaper cover 1. FIG. 7B is an explanatory diagram of the diaper cover 1 when worn by an infant. FIG. 1C is a diagram showing the diaper cover 1 in an unfolded and stretched state folded in half. FIG. 10A and FIG. 10B are diagrams showing how the length of the leg-openings LH is adjusted using snap buttons 50. FIG. 11A and FIG. 11B are explanatory diagrams showing the position of the size adjustment member 10. FIG. 1D is a plan view of a modified diaper cover 1. FIG. 1E is a side view of the modified diaper cover 1 in a worn state.

[0009] The present specification and the accompanying drawings make clear at least the following: (Aspect 1) A cloth diaper cover to be used in combination with an absorbent pad or a diaper, which, in an unfolded and stretched state, has longitudinal, width, and thickness directions that are orthogonal to one another, and which comprises a ventral-side stretchable portion that is stretchable in the longitudinal and width directions and located at a ventral end in the longitudinal direction and a central portion in the width direction, and a pair of ventral-side low-elasticity portions aligned in the width direction, wherein the ventral-side low-elasticity portion is adjacent to the ventral-side stretchable portion from the dorsal side in the longitudinal direction, the average value of the force required to stretch the ventral-side stretchable portion per unit length in the longitudinal direction to a predetermined length in the width direction is smaller than the average value of the force required to stretch the ventral-side low-elasticity portion per unit length in the longitudinal direction to the predetermined length in the width direction, and at least a portion of the boundary between the ventral-side stretchable portion and the ventral-side low-elasticity portion is inclined from the ventral side to the dorsal side in the longitudinal direction from the end portion in the width direction to the central portion.

[0010] According to Aspect 1, the abdominal-side stretchable portions, which stretch in both the longitudinal and width directions, easily follow the movement of the wearer's abdomen, preventing the cloth diaper cover from slipping off the wearer's abdomen. The pair of abdominal-side low-elastic portions are in a taut state when worn, supporting the wearer's abdomen from the crotch side so as to encase the wearer's abdomen at the boundary. Furthermore, the abdominal-side low-elastic portions or their extensions are easily fixed to the wearer's hip bones in the armpits, easily maintaining a taut state extending outward and upward in the width direction toward the hip bones. This prevents the cloth diaper cover from slipping out of position. Furthermore, the cloth diaper cover does not need to be tightly fastened to the wearer, preventing a feeling of pressure on the abdomen and improving comfort.

[0011] (Aspect 2) In the cloth diaper cover according to Aspect 1, the pair of ventral low-elasticity portions are continuous in the width direction.

[0012] According to the second aspect, the pair of abdominal low-elasticity portions can support the wearer's abdomen from the crotch side continuously in the width direction, thereby further suppressing displacement of the cloth diaper cover due to abdominal movement.

[0013] (Aspect 3) In the cloth diaper cover described in Aspect 2, when the cloth diaper cover is in an unfolded and stretched state, and the second region from the ventral side when the cloth diaper cover is divided into four equal parts in the longitudinal direction is defined as the ventral central region, the pair of ventral low-elasticity sections extend from the boundary to the ventral central region in the longitudinal direction and are arranged across the center of the cloth diaper cover in the width direction.

[0014] According to Aspect 3, the base portions of the abdominal-side low-elasticity portions that are stretched outward and upward in the width direction also become part of the abdominal-side low-elasticity portions and are less likely to stretch, which makes the abdominal-side low-elasticity portions more stretched, providing firm support for the wearer's abdomen and further preventing the cloth diaper cover from shifting in position due to abdominal movement.

[0015] (Aspect 4) A cloth diaper cover according to any one of aspects 1 to 3, wherein when the cloth diaper cover is unfolded and stretched, the end region on the ventral side when the cloth diaper cover is divided into four equal parts in the longitudinal direction has a ventral leg-around stretchable portion along the leg-around openings that is stretchable in the longitudinal direction and the width direction.

[0016] According to Aspect 4, the abdominal-side elasticized leg-opening portions fit snugly around the wearer's legs, preventing leakage of body waste from the leg-openings. Furthermore, the abdominal-side elasticized leg-opening portions absorb the force exerted by the wearer pulling their legs forward, preventing the cloth diaper cover from shifting vertically relative to the wearer.

[0017] (Aspect 5) A cloth diaper cover as described in Aspect 4, wherein the average value of the force required to stretch the abdominal stretchable portion of each unit length in the longitudinal direction to the specified length in the width direction is smaller than the average value of the force required to stretch the abdominal stretchable portion of each unit length in the width direction to the specified length in the longitudinal direction, and the average value of the force required to stretch the abdominal leg stretchable portion of each unit length in the longitudinal direction to the specified length in the width direction is greater than the average value of the force required to stretch the abdominal leg stretchable portion of each unit length in the width direction to the specified length in the longitudinal direction.

[0018] According to Aspect 5, the abdominal-side stretchable portion can more easily follow the movement of the wearer's waist, preventing a feeling of pressure on the abdomen and improving comfort. Furthermore, the force exerted by the wearer pulling their legs forward can be more easily absorbed by the abdominal-side leg-around stretchable portion, preventing the cloth diaper cover from shifting vertically relative to the wearer.

[0019] (Aspect 6) A cloth diaper cover as described in Aspect 4 or 5, wherein in an unfolded and stretched state, when the cloth diaper cover is divided into four equal parts in the longitudinal direction, a rear-side leg stretchable portion is provided along the leg openings at the rear end region, which is stretchable in the longitudinal direction and the width direction, and the front-side leg stretchable portion and the rear-side leg stretchable portion are connected via a crotch-side leg stretchable portion which is stretchable in the longitudinal direction and the width direction.

[0020] According to the sixth aspect, the elasticized portions are provided so as to surround the entire circumference of the wearer's legs, thereby enabling the cloth diaper cover to fit snugly around the wearer's legs and preventing leakage of body waste through the leg openings. Furthermore, the force exerted by the wearer pulling their legs forward is also absorbed by the crotch-side elasticized portions and the back-side elasticized portions, preventing the cloth diaper cover from shifting vertically relative to the wearer.

[0021] (Aspect 7) A cloth diaper cover as described in Aspect 6, wherein the sheet member constituting the ventral leg stretch portion and the sheet member constituting the crotch leg stretch portion are separate sheet members, and the sheet member constituting the dorsal leg stretch portion and the sheet member constituting the crotch leg stretch portion are a single sheet member.

[0022] According to Aspect 7, the seams between the abdominal stretchable leg sections and the crotch stretchable leg sections are more likely to fit the wearer's groin. This makes it easier for the abdominal stretchable leg sections to absorb the force that starts at the groin and pulls the legs forward. Meanwhile, the dorsal stretchable leg sections and the crotch stretchable leg sections are less likely to cause discomfort around the legs.

[0023] (Aspect 8) A cloth diaper cover as described in any of aspects 1 to 7, wherein, in an unfolded and stretched state, a pair of locking portions are provided at both ends of the width direction of the longitudinal back portion, and the locking force between the ventral low-elasticity portion and the locking portion is stronger than the locking force between the area adjacent to the ventral low-elasticity portion and the locking portion.

[0024] According to Aspect 8, the wearer can be guided so that the fastening portion engages with the abdominal-side low-elasticity portion. This allows the back portion to be fastened along the inclined abdominal-side low-elasticity portion, and the abdominal-side low-elasticity portion can be pulled outward and upward in the width direction. This allows the abdominal-side low-elasticity portion to firmly support the wearer's abdomen, further preventing the cloth diaper cover from shifting position in response to abdominal movement.

[0025] (Aspect 9) A cloth diaper cover as described in any one of aspects 1 to 8, wherein, in an unfolded and stretched state, a pair of fastening portions are provided at both widthwise ends of the longitudinal back portion, and at least a portion of an area that can be fastened to the fastening portions is provided in a region of the longitudinal ventral portion that is outer in the widthwise direction than the ventral stretch portion and more ventral than the back end of the ventral stretch portion in the longitudinal direction.

[0026] According to Aspect 9, the fastening portion on the back side can be fastened to a position close to the abdominal stretchable portion, making it easier to fasten the abdominal portion to the back side while stretching. Furthermore, even when the abdominal stretchable portion stretches, the abdominal portion in the vicinity thereof is securely fastened to the fastening portion on the back side, making it less likely for the cloth diaper cover to shift position.

[0027] (Aspect 10) The cloth diaper cover according to any one of Aspects 1 to 9, wherein a rear stretchable portion is provided at the rear end in the longitudinal direction, which is stretchable in the longitudinal direction and the width direction.

[0028] According to aspect 10, the upper end of the back portion fits the wearer's back, making it less likely that a gap will form between the wearer's back and the cloth diaper cover, thereby preventing rear leakage of excrement.

[0029] (Aspect 11) A cloth diaper cover as described in Aspect 10, wherein the average value of the force required to stretch the back stretched portion of the unit length in the longitudinal direction to the specified length in the width direction is greater than the average value of the force required to stretch the ventral stretched portion of the unit length in the longitudinal direction to the specified length in the width direction.

[0030] According to Aspect 11, the abdominal stretchable portion easily follows small abdominal movements due to breathing, etc., preventing a feeling of pressure on the abdomen and improving comfort. The back stretchable portion stretches and contracts to follow large movements of the wearer, but does not easily follow small abdominal movements. This makes it easier for the abdominal low-stretch portion or an extension thereof to remain fixed to the hip bones in the armpits of the wearer.

[0031] (Aspect 12) A cloth diaper cover as described in Aspect 10 or 11, which has a pair of back low-stretch portions adjacent to the back stretch portion and aligned in the width direction, wherein the average value of the force required to stretch the back low-stretch portions of the unit length in the longitudinal direction to the specified length in the width direction is smaller than the average value of the force required to stretch the back low-stretch portions of the unit length in the longitudinal direction to the specified length in the width direction, and when the cloth diaper cover in an unfolded and stretched state is folded in half at its center in the longitudinal direction, the widthwise end of the back low-stretch portions has a portion that overlaps with the widthwise end of the ventral low-stretch portion when viewed in the thickness direction.

[0032] According to Aspect 12, the ventral low-elasticity portion and the back low-elasticity portion are arranged to surround the wearer's waist, and are fixed at the wearer's hip bones while being pulled outward in the width direction to maintain a tensioned state. This prevents the cloth diaper cover from shifting in the waist direction. Furthermore, the ventral low-elasticity portion can support the abdomen, and the back low-elasticity portion can support the buttocks.

[0033] (Aspect 13) A cloth diaper cover as described in Aspect 12, wherein at least a portion of the boundary between the back stretch portion and the back low-stretch portion is inclined from the back side to the ventral side in the longitudinal direction from the end portion in the width direction toward the center portion.

[0034] According to Aspect 13, when the cloth diaper cover is worn, the ventral low-elasticity portion and the back low-elasticity portion are likely to be connected to form a ring shape, which allows the ventral low-elasticity portion and the back low-elasticity portion to be easily fixed to the hip bones in the armpits of the wearer, thereby preventing the cloth diaper cover from shifting around the waist.

[0035] (Aspect 14) A cloth diaper cover according to any one of aspects 1 to 13, wherein a size adjustment section is provided in the crotch area, which is located under the wearer's crotch when worn, for adjusting the longitudinal length of the cloth diaper cover.

[0036] According to the fourteenth aspect, the longitudinal length of the cloth diaper cover can be adjusted according to the wearer's body type (leg circumference) and loosening of the cloth diaper cover in the crotch area of ​​the wearer can be prevented, thereby preventing leakage of body waste.

[0037] (Aspect 15) The cloth diaper cover according to any one of Aspects 1 to 14, wherein the thickness direction air permeability is 10 m / s or less in the crotch area, which is located under the crotch of a wearer when worn. ３ / m ２ / min or more, 100m ３ / m ２ / min or less.

[0038] According to aspect 15, the air permeability is 10 m ３ / m ２ / min, the breathability of the cloth diaper cover is better, the inside is less likely to get stuffy, and the comfort of wearing is improved. ３ / m ２ This ensures the strength (durability) of the cloth diaper cover when in use, compared to when it is greater than 1 / minute.

[0039] (Aspect 16) A cloth diaper cover according to any one of aspects 1 to 15, which does not have a waterproof layer.

[0040] According to Aspect 16, the dehydration effect during washing is improved. Furthermore, the absence of a waterproof layer also improves breathability, allowing air to easily pass through the cloth diaper cover. This makes it easier to dry after washing. Furthermore, the increased breathability prevents the inside of the cloth diaper cover from becoming stuffy. This improves comfort.

[0041] (Aspect 17) A diaper cover to be used in combination with an absorbent pad or a diaper, which in an unfolded and stretched state has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another, and comprises a ventral-side stretchable section that is provided at a ventral end in the longitudinal direction and at a center in the width direction and is stretchable in the longitudinal direction and the width direction; a dorsal-side stretchable section that is provided at a dorsal end in the longitudinal direction and at a center in the width direction and is stretchable in the longitudinal direction and the width direction; a low-stretch section that is provided continuously in the longitudinal direction from a position adjacent to the ventral-side stretchable section to a position adjacent to the dorsal-side stretchable section; and and leg-surrounding stretchable sections that are stretchable in the width direction, and wherein an average value of the force required to stretch the ventral stretchable section of a unit length in the longitudinal direction to a predetermined length in the width direction and an average value of the force required to stretch the dorsal stretchable section of a unit length in the longitudinal direction to a predetermined length in the width direction are smaller than an average value of the force required to stretch the low-elasticity section of a unit length in the longitudinal direction to the predetermined length in the width direction, and at least a part of the boundary between the ventral stretchable section and the low-elasticity section is inclined from the ventral side to the dorsal side in the longitudinal direction from the end portion toward the center in the width direction.

[0042] According to Aspect 17, the low-elasticity sections, which are in a taut state when worn, can support the wearer's abdomen and buttocks. The low-elasticity sections are also easily secured to the wearer's hip bones, making it difficult for the diaper cover to slip out of place. Furthermore, the abdominal stretchable section, dorsal stretchable section, and leg stretchable sections follow the wearer's movements, preventing a feeling of pressure on the wearer and improving comfort.

[0043] == ...

[0044] First Embodiment Basic Configuration of a Cloth Diaper Cover 1 In the first embodiment, a cloth diaper cover will be described as an example. In the following description, the cloth diaper cover will also be simply referred to as a "diaper cover." Fig. 1 is a plan view of the diaper cover 1 in an unfolded and stretched state, as seen from the skin side. Fig. 2 is a plan view of the diaper cover 1 in an unfolded and stretched state, as seen from the non-skin side. Fig. 3 is a schematic perspective view of the diaper cover 1 in a worn state. Fig. 4 is a schematic rear view of the diaper cover 1 in a worn state. Fig. 5 is a schematic side view of the diaper cover 1 in a worn state.

[0045] The "unfolded state" refers to the state in which the diaper cover 1 is unfolded and laid out flat. In the case of a pants-type diaper cover, this refers to the state in which the joints at both sides (sides) of the front and back panels in the width direction are separated and opened, and the diaper cover is laid out flat. The "stretched state" refers to the state in which the diaper cover 1 is stretched without wrinkles. Specifically, this refers to the state in which the dimensions of the material (e.g., fabric) constituting the diaper cover 1 are stretched to the same length as or close to the dimensions of the material (e.g., fabric) alone.

[0046] In the unfolded and stretched state, the diaper cover 1 has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another. In the longitudinal direction, the side that contacts the wearer's abdomen is called the "abdominal side," and the side that contacts the wearer's back is called the "dorsal side." In the thickness direction, the side closest to the wearer's skin is called the "skin side," and the opposite side is called the "non-skin side."

[0047] The diaper cover 1 has a main body member 2 and a size adjustment member 10. In an unfolded and extended state, the main body member 2 has a generally hourglass-shaped planar shape with the longitudinal center portion narrowed inward in the width direction. The size adjustment member 10 is a member for adjusting the longitudinal length of the main body member 2.

[0048] In this specification, in the diaper cover 1 in an unfolded and stretched state, the region closer to the ventral side than the longitudinal center CL is referred to as the ventral side portion 1A, and the region closer to the dorsal side than the longitudinal center CL is referred to as the dorsal side portion 1B. The diaper cover 1 is a tape-type (open type) diaper cover. In the unfolded and stretched state, the dorsal side portion 1B is provided with a pair of fastening portions 3 at both widthwise ends. The fastening portions 3 in FIG. 1 are hook members (male members of a hook-and-loop fastener) equipped with a plurality of fastening protrusions. The fastening portions 3 are detachably fastened to the non-skin side of the ventral side portion 1A. The fastening portions 3 may be fastened directly to the fabric constituting the main body member 2, or may be fastened to a female member of a hook-and-loop fastener provided on the ventral side portion 1A. 3, when the diaper cover 1 is worn, the diaper cover 1 is folded in half approximately at the longitudinal center, and then both widthwise ends of the back portion 1B (hereinafter also referred to as "flap portions 4") are folded inward in the widthwise direction, and the fastening portions 3 are fastened to the non-skin-side surfaces of the abdominal portion 1A. As a result, the diaper cover 1 is formed with a waist opening BH that fits around the wearer's waist and a pair of leg openings LH that fit around the wearer's legs.

[0049] The diaper cover 1 (main body member 2) is made of a reusable cloth fabric (sheet member). Examples of the cloth fabric that constitutes the diaper cover 1 include woven fabrics and knitted fabrics. A woven fabric is a fabric constructed in a flat shape by interlacing weft threads at right angles to a number of parallel warp threads, such as a fabric called a "woven fabric." A knitted fabric is a fabric constructed in a flat shape by looping threads and connecting these loops to other loops, such as a fabric called a "knit." The fibers that constitute the cloth fabric are not particularly limited, and examples include natural fibers such as cotton and silk; synthetic fibers such as polyester, polyurethane, nylon, and acrylic; semi-synthetic fibers such as acetate; and recycled fibers such as rayon. These fibers may be used alone or in combination.

[0050] The diaper cover 1 is used in conjunction with an absorbent pad (not shown) that absorbs urine and other excrement. The absorbent pad is attached to the skin-facing side of the diaper cover 1 so that it abuts the wearer's excretory openings (urinary and fecal openings) when worn. The absorbent pad may be reusable by washing, or may be disposable. Although not provided on the diaper cover 1 in FIG. 1 , the skin-facing side of the diaper cover 1 may be provided with a fastening area (e.g., a hook-and-loop fastener) for removably fastening the absorbent pad, or with a mark indicating the attachment position of the absorbent pad.

[0051] As described above, if the diaper cover 1 is made of cloth, it can be washed and reused (reused repeatedly). Using a reusable diaper cover 1 and a reusable absorbent pad in combination further reduces waste. On the other hand, using a disposable absorbent pad reduces the number of washes, thereby easing the burden on the user and the environmental impact of washing. Using a disposable absorbent pad reduces waste and the environmental impact compared to using tape-type disposable diapers. While the diaper cover 1 also needs to be washed, the number of washes of the diaper cover 1 can be reduced compared to the number of washes of an absorbent pad, which is replaced and washed after each excretion. In other words, using a disposable absorbent pad in combination with the diaper cover 1 reduces waste while limiting the number of washes, thereby reducing the burden on the user and the environmental impact of washing. Furthermore, the diaper cover 1 of this embodiment, which includes the ventral stretchable portion 21 and a pair of ventral low-stretchable portions 22, 23 (described in detail below), is less likely to slip out of position. Therefore, excrement is absorbed by the internal absorbent pad, and excrement is less likely to leak onto the diaper cover 1, clothing, bedding, etc., and these are less likely to be soiled, which reduces the number of times the diaper cover needs to be washed, thereby reducing the burden on the user and the environmental impact of washing.

[0052] <Regarding slip-down prevention and wearing comfort> Fig. 6 is a plan view of the ventral side portion 1A of the diaper cover 1 in an unfolded and stretched state. Figs. 7A and 7B are explanatory diagrams of a pants-type diaper cover 1. Fig. 7A shows the ventral side portion of the pants-type diaper cover 1, and Fig. 7B shows the dorsal side portion of the pants-type diaper cover 1. To avoid complication of explanation, the pants-type diaper cover will be designated by the same reference numerals as the tape-type diaper cover 1 and will also be referred to simply as the "diaper cover." Furthermore, the same reference numerals will be used to designate common components.

[0053] As shown in Fig. 6, the diaper cover 1, in its unfolded and stretched state, has a "ventral stretchable section 21" that is stretchable in the longitudinal and width directions and is located at the ventral end in the longitudinal direction and in the widthwise center, and a "pair of ventral low-elastic sections 22, 23" that are aligned in the width direction. The ventral low-elastic sections 22, 23 are adjacent to the ventral stretchable section 21 from the longitudinal back side (crotch side). In the diaper cover 1 illustrated in Fig. 6, the widthwise center C is the boundary between the pair of ventral low-elastic sections 22, 23.

[0054] The abdominal-side stretchable portion 21 stretches more easily in the width direction than the abdominal-side low-elastic portions 22, 23. In other words, the average value of the force required to stretch the abdominal-side stretchable portion 21 of a unit length in the longitudinal direction to a predetermined length in the width direction is smaller than the average value of the force required to stretch the abdominal-side low-elastic portions 22, 23 of a unit length in the longitudinal direction to a predetermined length in the width direction.

[0055] At least a portion of the boundary B1 between the ventral-side stretchable portion 21 and the ventral-side low-elastic portions 22, 23 is inclined from the ventral side to the dorsal side (toward the crotch) in the longitudinal direction from the end portions in the width direction of the diaper cover 1 toward the center. Similarly, the pants-type diaper cover 1 shown in Fig. 7A is also provided with a ventral-side stretchable portion 21 and a pair of ventral-side low-elastic portions 22, 23.

[0056] The wearer's abdomen is rounded and moves easily with breathing, and its expansion changes with eating, drinking, and excretion. In particular, the abdomen of an infant or toddler tends to bulge and change significantly between expansion and contraction. By providing the abdominal stretchable portion 21 at the above-described position, it can abut against the top of the wearer's abdomen. The abdominal stretchable portion 21 stretches in both the longitudinal and width directions, and therefore also in directions oblique to the longitudinal and width directions. Therefore, the abdominal stretchable portion 21 fits the wearer's abdomen more easily and follows abdominal movement more easily than if it stretched only in the width direction. This prevents the upper end of the diaper cover 1 (the longitudinal abdominal end) from slipping down onto the narrow waistband portion (the convex abdominal hem) on the crotch side.

[0057] Furthermore, the abdominal-side low-elasticity portions 22, 23 are less stretchable in the width direction than the abdominal-side stretchable portion 21. Therefore, when the diaper cover 1 is worn (e.g., FIG. 3), the pair of abdominal-side low-elasticity portions 22, 23 are each pulled outward in the width direction and placed in a taut state. As a result, the wearer's abdomen is supported from the crotch side by the pair of abdominal-side low-elasticity portions 22, 23 so that it is wrapped around the inclined boundary B1 (the upper ends of the abdominal-side low-elasticity portions 22, 23). This prevents the diaper cover 1 from shifting (slipping down) in response to abdominal movement.

[0058] Specifically, in the case of a tape-type diaper cover 1, the pair of ventral-side low-elasticity portions 22, 23 are pulled outward in the width direction and put into a taut state by the flap portion 4 of the back portion 1B, which is folded back toward the ventral side and secured by the fastening portion 3. In the case of a pants-type diaper cover 1 shown in Fig. 7A, the diaper cover 1 stretches in the width direction to fit around the waist of the wearer, and as a result, the pair of ventral-side low-elasticity portions 22, 23 are pulled outward in the width direction and put into a taut state.

[0059] In particular, in the case of a tape-type diaper cover 1 (Fig. 3), the flap portion 4 of the back portion 1B is fastened at an angle along the boundary B1, so that the pair of low-elasticity abdominal portions 22, 23 are pulled outward and upward in the width direction, thereby supporting the wearer's abdomen by pulling it up.

[0060] Furthermore, the abdominal low-elasticity sections 22, 23 and their extensions (e.g., the flap section 4 of the back section 1B) are inclined along the boundary section B1 (inclined upward toward the widthwise end). This allows the abdominal low-elasticity sections 22, 23 or their extensions to contact the wearer's hip bones (see FIG. 5 ) and be easily fixed in position by the hip bones. This helps the abdominal low-elasticity sections 22, 23 to remain taut toward the hip bones, outward and upward in the widthwise direction, and thus helps the abdominal low-elasticity sections 22, 23 to maintain support for the wearer's abdomen. This reduces the likelihood of the diaper cover 1 shifting position due to abdominal movement. Furthermore, the diaper cover 1 is less likely to sag even after the absorbent pad has absorbed excrement.

[0061] Therefore, the diaper cover 1 of this embodiment can prevent the diaper cover from slipping off the wearer's abdomen, even if it is not tightly fastened around the waist (for example, even if the flap portion 4 is not fastened further inward in the width direction). This prevents the abdomen from feeling oppressive, improving comfort. Furthermore, the diaper cover 1 keeps the wearer's abdomen covered, preventing the abdomen from getting cold. Furthermore, since the diaper cover 1 is less likely to slip out of position, it is less likely to create gaps between the diaper cover and the wearer, thereby preventing leakage of excrement.

[0062] One example of a method for differentiating the stretchability of the abdominal stretchable portion 21 and the abdominal low-stretchable portions 22, 23 is to use fabrics with different stretchability for each portion. That is, the cloth diaper cover 1 can be formed by sewing together the fabric for the abdominal stretchable portion 21 and the fabric for the abdominal low-stretchable portions 22, 23. The same applies to the other stretchable portions (leg stretchable portions (31-33), back stretchable portion 41) and low-stretchable portions (back low-stretchable portions 42, 43) described below. Specifically, a woven fabric can be made stretchable (easily stretchable) by using highly stretchable yarn (yarn made of elastic fiber) or by changing the yarn density. Because knitted fabrics are made by connecting many loops, deformation of each loop can result in significant stretch with little force.

[0063] Furthermore, the abdominal stretchable portion 21 in FIG. 6 has a curved shape that is convex toward the crotch area. Therefore, the boundary B1 is configured as an arc-shaped curve. However, the shape of the abdominal stretchable portion 21 is not particularly limited as long as the boundary B1 is inclined in the direction described above. For example, the boundary B1 may be configured as a straight line, a meandering wave-like slope, or a stepped slope. Furthermore, the abdominal stretchable portion 21 may be, for example, U-shaped, with a portion of the boundary B1 inclined. The same applies to the dorsal boundary B2 described below.

[0064] In the diaper cover 1 of this embodiment, the ventral low-elasticity portions 22, 23 extend to the longitudinal center CL of the diaper cover 1, but this is not limitative. For example, the ventral low-elasticity portions 22, 23 may be short in length, and the longitudinal center of the diaper cover 1 may be stretchable.

[0065] (Method for comparing stretchability) As described above, the average value of the force required to stretch a unit length in the longitudinal direction to a predetermined length in the width direction differs between the abdominal-side stretchable section 21 and the abdominal-side low-elasticity sections 22, 23. Below, a method for measuring the average value of the force required to stretch a target section of unit length in the "first direction (direction perpendicular to the stretching direction)" to a predetermined length in the "second direction (stretching direction)" will be described.

[0066] The above force can be measured using a tensile tester (e.g., Instron Model 5965 or equivalent). First, the entire area of ​​the target region of the diaper cover 1 (e.g., the ventral stretchable portion 21 and the ventral low-elasticity portions 22, 23) is cut out along its contour. Each target region is divided into N equal parts in a first direction (a direction perpendicular to the stretching direction) and then cut along a second direction (the stretching direction) to create N sample pieces. It is desirable to divide the sample pieces so that the width of the sample pieces in the first direction is approximately 10 mm to 25 mm. For example, in the case of a substantially semicircular ventral stretchable portion 21, it is cut along lines along the width direction (dotted lines shown in Figure 6) that divide the longitudinal direction into four equal parts, thereby forming substantially rectangular sample pieces that are long in the width direction. Furthermore, the substantially Y-shaped ventral low-elasticity portions 22, 23 branch off at the ventral stretchable portion 21. Therefore, it is preferable to first divide the ventral low-elasticity portions 22, 23 into three regions (divided along the dotted lines shown in Figure 6). That is, the garment is divided into a region adjacent to one side of the abdominal stretchable section 21 in the width direction, a region adjacent to the other side of the abdominal stretchable section 21 in the width direction, and a region located on the crotch side in the longitudinal direction of the abdominal stretchable section 21. Each of the three divided regions is cut along a line (not shown) along the width direction that divides the region equally in the longitudinal direction, and multiple sample pieces can be created.

[0067] Next, the width of each sample piece in the first direction (the direction perpendicular to the elongation direction) is measured. Then, both ends (approximately 10 mm each) of the sample piece in the second direction (elongation direction) are gripped with a pair of chucks of a tensile tester. The chuck distance is determined according to the length of the sample piece in the second direction (enough so that the sample piece does not slacken). The chuck distance is then widened by a predetermined distance at a tensile speed of 100 mm / min. Specifically, the initial chuck distance is set to 100%, and the tensile load (N / sample piece width) is obtained when the chuck distance is widened by 130% (when the sample piece elongation rate is 130%). The obtained tensile load is converted to a value for a 25 mm width. In this way, the tensile load (N / 25 mm) of each sample piece is obtained. Next, the average tensile load (N / 25 mm) of each sample piece is calculated for each target portion. This average is defined as the "average force required to stretch a target portion of a unit length in the first direction by a predetermined length in the second direction."

[0068] Using the above measurement method, it is confirmed that the average tensile load of each of the multiple samples cut out from the abdominal-side stretchable portion 21 is smaller than the average tensile load of each of the multiple samples cut out from the abdominal-side low-elastic portions 22, 23. As long as this relationship is established, the entire abdominal-side stretchable portion 21 does not necessarily have to be more stretchable in the width direction than the abdominal-side low-elastic portions 22, 23. In other words, a portion of the abdominal-side stretchable portion 21 may be equally stretchable as the abdominal-side low-elastic portions 22, 23, or may be less stretchable than the abdominal-side low-elastic portions 22, 23. For example, the upper end (the end on the abdominal side in the longitudinal direction) of the abdominal-side stretchable portion 21 may have a fabric that is folded over, have a seam, have flat elastic, have bias tape sewn to it, or be made of a different fabric than the other portions of the abdominal-side stretchable portion 21, so that the stretchability in the width direction may be different from the other portions of the abdominal-side stretchable portion 21.

[0069] Furthermore, the abdominal stretchable portion 21 is stretchable in both the longitudinal and width directions. Specifically, in the region of the abdominal stretchable portion 21 where stretchability is primarily exhibited (excluding regions where the fabric is folded over, seams are formed, or flat elastic is provided, as described above), the longitudinal and widthwise stretch rates are preferably 120% or greater, and more preferably 125% or greater. In other words, the longitudinal and widthwise stretch rates of the fabric (stretchable fabric) constituting the abdominal stretchable portion 21 are preferably 120% or greater, and more preferably 125% or greater. The "stretch rate" refers to the ratio (G1 / G0) of the length (G1) after stretching to the length (G0) before stretching when the target region is stretched in the elongation direction (longitudinal or width direction) with a predetermined force. Specifically, a portion of the fabric is cut out as a sample piece from the target region (here, the abdominal stretchable portion 21). Alternatively, if the fabric constituting the target area can be prepared, a sample piece is formed from the fabric. The sample piece is rectangular, with a "length in the elongation direction" of 100 mm plus the chuck grip width (approximately 10 mm above and below), and a "width perpendicular to the elongation direction" of 25 mm. However, the size of the sample piece may be appropriately adjusted depending on the size of the target area. Then, using a tensile tester (e.g., Instron Model 5965 or equivalent), the chuck distance is increased at a pulling rate of 100 mm / min, and the elongation percentage is determined when the sample piece is pulled in the elongation direction with a force of 1 N / 25 mm, i.e., a force of 1 N per 25 mm sample width. The initial chuck distance before the test (e.g., 100 mm) corresponds to the length before tension (G0), and the chuck distance when stretched with a predetermined force (1 N / 25 mm) corresponds to the length after tension (G1). Preferably, the elongation is measured for multiple sample pieces (e.g., n=5) and the average value is calculated. The elongation can be calculated similarly for the other stretchable sections (leg stretchable sections (31-33) and back stretchable section 41) described below. The longitudinal elongation of the fabric constituting the leg stretchable sections (31-33) is preferably 120% or more, and more preferably 125% or more.The widthwise stretch percentage of the fabric constituting the back-side stretchable portion 41 is preferably 120% or more, and more preferably 125% or more. The abdominal-side low-elastic portions 22, 23 may not have stretchability in the widthwise direction (the widthwise stretch percentage of the fabric constituting the abdominal-side low-elastic portions 22, 23 may be less than 102%), or may have stretchability in the widthwise direction but have a lower stretch percentage than the abdominal-side stretchable portion 21. The same applies to the back-side low-elastic portions 42, 43.

[0070] The pair of abdominal-side low-elasticity sections 22, 23 may also be spaced apart in the width direction. Although not shown, for example, a portion of the abdominal-side stretchable section 21 may extend longitudinally toward the crotch area between the pair of abdominal-side low-elasticity sections 22, 23 aligned in the width direction. However, more preferably, the pair of abdominal-side low-elasticity sections 22, 23 are continuous in the width direction, as in the diaper cover 1 shown in Figure 6. This allows the pair of abdominal-side low-elasticity sections 23, 23, which are in a taut state when worn, to support the wearer's abdomen continuously in the width direction. This further reduces displacement of the diaper cover 1 due to abdominal movement.

[0071] 2 and 6, when the diaper cover 1 is divided into four equal parts in the longitudinal direction in the unfolded and stretched state, the first region from the ventral side is referred to as the "ventral end region 1A1 (ventral end region)." The second region from the ventral side is referred to as the "ventral central region 1A2." Preferably, the pair of ventral low-elasticity portions 22, 23 extend from the boundary B1 to the ventral central region 1A2 in the longitudinal direction and are provided so as to straddle the center C of the diaper cover 1 in the width direction.

[0072] As a result, as shown in Figure 6, the area extending from the abdominal low-elasticity sections 22, 23 located in the abdominal end region 1A1 (for example, the area R1 extending along the inclination direction of the boundary B1 as shown in Figures 3 and 6) also becomes part of the abdominal low-elasticity sections 22, 23. In other words, the base portions of the abdominal low-elasticity sections 22, 23, which are stretched outward and upward in the width direction, also become less stretchable. This allows the abdominal low-elasticity sections 22, 23 located in the abdominal end region 1A1 to be more stretched, providing firm support for the wearer's abdomen. This further reduces displacement of the diaper cover 1 due to abdominal movement.

[0073] Fig. 8 is an explanatory diagram of the diaper cover 1 when worn by an infant. When the diaper cover 1 is unfolded and stretched, as shown in Fig. 6, the abdominal end region 1A1 preferably has abdominal-side stretchable leg-around sections 31 along the leg openings LH (at the edges along the wearer's legs). The abdominal-side stretchable leg-around sections 31 are stretchable in both the longitudinal and transverse directions.

[0074] This allows the abdominal leg-opening stretchable sections 31 to fit snugly around the wearer's legs, reducing gaps and preventing leakage of excrement through the leg-openings LH. Furthermore, the wearer often pulls their thighs forward when walking, etc. Infants, in particular, often assume a posture in which their thighs are pulled up close to their abdomen, as shown in Figure 8 . Therefore, by providing stretchability not only in the width direction but also in the lengthwise direction, the abdominal leg-opening stretchable sections 31 absorb the force exerted by the wearer pulling their legs forward. This prevents the diaper cover 1 from shifting vertically, and helps maintain the abdominal low-elasticity sections 22, 23 or their extensions fixed to the hip bones. Furthermore, this allows the wearer to easily pull their legs forward, reducing discomfort around the legs.

[0075] 2 and other figures are formed from a sheet member separate from the crotch-side leg stretchable portion 33 described below, and the sheet member seams define the abdominal-side leg stretchable portion 31. In this case, it is sufficient that at least a portion of the abdominal-side leg stretchable portion 31 is provided in the abdominal end region 1A1, and a portion of the abdominal-side leg stretchable portion 31 may be located in the abdominal central region 1A2.

[0076] Furthermore, it is preferable that the abdominal-side stretchable portion 21 stretches more easily in the width direction than in the longitudinal direction. In other words, the average force required to stretch a unit length of the abdominal-side stretchable portion 21 in the longitudinal direction by a predetermined length in the width direction should be smaller than the average force required to stretch a unit length of the abdominal-side stretchable portion 21 in the width direction by a predetermined length in the longitudinal direction. This comparison can be made using the method for comparing stretchability described above. Note that the force required to stretch the abdominal-side stretchable portion 21 in the longitudinal direction can be measured by cutting the abdominal-side stretchable portion 21 cut out from the diaper cover 1 along lines along the longitudinal direction that divide it equally in the width direction, creating multiple sample pieces.

[0077] This allows the abdominal stretchable portion 21 to easily follow the movement of the wearer's waist, preventing pressure on the abdomen and improving comfort. Also, the diaper cover 1 fits snugly around the wearer's waist, preventing the diaper cover 1 from slipping down.

[0078] In contrast, the abdominal-side stretchable leg sections 31 should preferably be more stretchable in the longitudinal direction than in the width direction. In other words, the average force required to stretch a unit length of the abdominal-side stretchable leg sections 31 by a predetermined length in the width direction should be greater than the average force required to stretch a unit length of the abdominal-side stretchable leg sections 31 by a predetermined length in the longitudinal direction. This comparison can be made using the method for comparing stretchability described above. Briefly, measurements are taken from multiple sample pieces cut along widthwise lines that divide the abdominal-side stretchable leg sections 31 equally in the longitudinal direction, and compared with measurements from multiple sample pieces cut along longitudinal lines that divide the abdominal-side stretchable leg sections 31 equally in the width direction.

[0079] This allows the force exerted by the wearer pulling their legs forward to be more easily absorbed by the abdominal-side leg-edge stretchable section 31, thereby further reducing vertical displacement of the diaper cover 1. It also makes it easier for the wearer to pull their legs forward, reducing discomfort around the legs. To achieve this relationship, for example, the fabric orientation of the abdominal-side leg-edge stretchable section 21 and the abdominal-side leg-edge stretchable section 31 may be rotated by 90 degrees, or fabrics of different properties may be used.

[0080] As shown in FIG. 2 , when the diaper cover 1 is divided into four equal parts in the longitudinal direction in the unfolded and stretched state, the first region from the back side is referred to as the "dorsal end region 1B1 (dorsal end region)." The second region from the back side is referred to as the "dorsal central region 1B2." In this case, when the diaper cover 1 is unfolded and stretched, the back end region 1B1 preferably has dorsal leg stretchable sections 32 along the leg openings LH (at the edges along the wearer's legs). The dorsal leg stretchable sections 32 are stretchable in both the longitudinal and transverse directions. Furthermore, the ventral leg stretchable sections 31 and the dorsal leg stretchable sections 32 are preferably connected via crotch-side leg stretchable sections 33 that are stretchable in both the longitudinal and transverse directions.

[0081] The ventral leg-line stretchable section 31, the crotch-side leg-line stretchable section 33, and the back-side leg-line stretchable section 32 are connected together, providing the stretchable sections (31-33) that completely surround the wearer's legs. This allows the diaper cover 1 to fit snugly around the wearer's legs, preventing leakage of body waste through the leg openings LH. Furthermore, as shown in FIG. 8 , the force exerted by the wearer pulling their legs forward is transmitted via the ventral leg-line stretchable section 31 to the crotch-side leg-line stretchable section 33 and the back-side leg-line stretchable section 32. This leg-pulling force is also absorbed by the crotch-side leg-line stretchable section 33 and the back-side leg-line stretchable section 32, further preventing the diaper cover 1 from shifting vertically. This also makes it easier for the wearer to pull their legs forward, preventing discomfort around the legs.

[0082] As shown in FIG. 2, it is preferable that the sheet material constituting the abdominal stretchable leg portion 31 and the sheet material constituting the crotch stretchable leg portion 33 are separate sheet materials (fabric), and that the sheet material constituting the dorsal stretchable leg portion 32 and the sheet material constituting the crotch stretchable leg portion 33 are a single sheet material (fabric).

[0083] As a result, the seams (boundaries) between the abdominal leg stretchable sections 31 and the crotch leg stretchable sections 33 are made more rigid by the joining of fabrics and stitching with thread. This allows the seams to more easily fit the wearer's groin. This makes it easier for the abdominal leg stretchable sections 31 to absorb the leg pulling force that starts from the groin. On the other hand, the dorsal leg stretchable sections 32 and the crotch leg stretchable sections 33 easily stretch together in response to the wearer's leg movements, and the absence of any highly rigid seams reduces discomfort around the legs.

[0084] The abdominal stretchable leg section 31 and the crotch stretchable leg section 33 are formed from separate sheet members, but the sheet members (fabric) may be the same or different. Furthermore, without being limited to the above, for example, the dorsal stretchable leg section 32 and the crotch stretchable leg section 33 may be formed from separate sheet members, or all of the leg stretchable sections (31-33) may be formed from a single sheet member. Furthermore, to improve the fit around the wearer's legs, in addition to the stretchable fabric, some of the leg stretchable sections (31-33) (e.g., the crotch stretchable leg section 33) may be provided with flat elastic. This can further prevent leakage of body waste through the leg openings LH.

[0085] Furthermore, when the flap portion 4 of the back portion 1B is fastened by the fastening portion 3 (such as a male component of a hook-and-loop fastener), as in the tape-type diaper cover 1 of this embodiment, it is preferable that the fastening force between the fastening portion 3 and the non-skin side of the ventral low-elastic portions 22, 23 is stronger than the fastening force between the fastening portion 3 and the non-skin side of the region adjacent to the ventral low-elastic portions 22, 23. Specifically, the region adjacent to the ventral low-elastic portions 22, 23 refers to the region adjacent to the ventral low-elastic portions 22, 23 in the ventral end region 1A1. In the diaper cover 1 of this embodiment, these are the ventral stretchable portion 21 and the ventral leg-around stretchable portion 31.

[0086] This allows the user (parent, etc.) to guide the flap portion 4 of the back portion 1B so that it is engaged with the ventral low-elasticity portions 22, 23 by the engaging portion 3, as shown in Figure 3. As a result, the flap portion 4 of the back portion 1B is engaged at an angle along the boundary B1, and the ventral low-elasticity portions 22, 23 are pulled outward and upward in the width direction. This allows the pair of ventral low-elasticity portions 22, 23 to firmly support the wearer's abdomen, lifting it up. Furthermore, the flap portion 4 of the back portion 1B is more easily secured to the wearer's hip bones. This prevents the diaper cover 1 from shifting out of position.

[0087] The comparison of the fastening force of the fastening portion 3 can be performed by a known method. For example, the comparison can be performed by having a person fasten and release the fastening portion 3 to multiple target areas (the abdominal low-elasticity portions 22, 23 and adjacent areas). Alternatively, the comparison can be performed using a tensile tester (e.g., Instron Model 5965 or equivalent). First, the target areas to which the fastening portion 3 is to be fastened (the abdominal low-elasticity portions 22, 23 and adjacent areas) are cut out from the diaper cover 1. The back flap portion 4 including the fastening portion 3 is also cut out. Next, the fastening portion 3 is lightly attached to the target areas (the abdominal low-elasticity portions 22, 23 or adjacent areas) over a predetermined area (all or part of the fastening portion 3). For example, if the fastening portion 3 is a male component of a hook-and-loop fastener, the entire fastening portion 3 is attached to the target areas. If the fastening portion is fabric 44 shown in FIG. 12 (described later), the entire fabric 44 is attached to the target areas. The flap portion 4 (the engaging portion 3) and the target portion are engaged with each other so that their width directions are generally aligned. If necessary, a zipper gripping portion may be formed using cloth tape at the tip of the flap portion 4 in the width direction. Next, a 700 g roller is rolled once (one way) in the width direction over the engaged target portion and the engaging portion 3 to bond the target portion and the engaging portion 3. The end of the target portion in the width direction and the tip of the flap portion 4 in the width direction (or the gripping portion made of cloth tape) are clamped between the chucks of a tensile tester. Next, the distance between the chucks is increased at a constant tensile speed (e.g., 300 mm / min) until the flap portion 4 (the engaging portion 3) separates from the target portion. The maximum tensile load (N) measured during this time is compared as the engaging force. It is confirmed that the tensile load when separating the ventral low-elasticity portions 22, 23 and the engaging portion 3 is greater than the tensile load when separating the engaging portion 3 from the adjacent region.

[0088] As shown in Figure 1, it is preferable that the back end of the diaper cover 1 be provided with a "back stretchable section 41" that is stretchable in both the longitudinal and width directions. This allows the upper end of the back section 1B to fit the wearer's back and follow the wearer's hunched posture and back movements. This reduces the likelihood of a gap forming between the wearer's back and the diaper cover 1, thereby preventing rear leakage of excrement. Furthermore, if the diaper cover 1 is a tape-type diaper cover, the flap section 4 can be stretched and engaged with the ventral section during donning, making it easier to don.

[0089] The dorsal stretchable portion 41 preferably has reduced stretchability compared to the ventral stretchable portion 21. In other words, the average value of the force required to stretch a unit length of the dorsal stretchable portion 41 in the longitudinal direction to a predetermined length in the width direction is preferably greater than the average value of the force required to stretch a unit length of the ventral stretchable portion 21 in the longitudinal direction to a predetermined length in the width direction (this comparison can be made using the method for comparing stretchability described above).

[0090] The abdominal stretchable portion 21 is highly stretchable, allowing it to follow even small abdominal movements, such as those caused by breathing. This prevents the abdominal region from feeling constricted, improving comfort. Meanwhile, the back stretchable portion 41 is less stretchable, allowing it to stretch to follow the wearer's larger movements while being less likely to follow small abdominal movements. This prevents the diaper cover 1 from shifting out of position around the wearer's waist. This means that the abdominal low-elastic portions 22, 23, or portions extending therefrom, are more likely to remain fixed to the wearer's hip bones. Methods for differentiating the stretchability of the abdominal stretchable portion 21 and the back stretchable portion 41 include, for example, providing flat elastic at the top end of the back stretchable portion 41 or using fabrics with different stretchability.

[0091] 9 shows the diaper cover 1 in an unfolded and stretched state folded in half. As shown in Fig. 1, the diaper cover 1 has a pair of back-side low-elasticity sections 42, 43 adjacent to the back-side stretchable section 41 and aligned in the width direction. In the diaper cover 1 of this embodiment, the back-side low-elasticity sections 42, 43 extend to the longitudinal center CL of the diaper cover 1, but this is not limitative.

[0092] Specifically, the pair of low-elastic back portions 42, 43 are adjacent to the back stretchable portion 41 from the ventral side (crotch side) in the longitudinal direction. The low-elastic back portions 42, 43 are more difficult to stretch than the back stretchable portion 41. In other words, the average value of the force required to stretch a unit length of the low-elastic back portion 42, 43 in the longitudinal direction to a predetermined length in the width direction is smaller than the average value of the force required to stretch a unit length of the low-elastic back portions 42, 43 in the longitudinal direction to a predetermined length in the width direction (this comparison can be made using the method for comparing ease of stretch described above).

[0093] As shown in Figure 9, when the diaper cover 1 in an unfolded and stretched state is folded in half at its longitudinal center CL, it is preferable that the widthwise ends of the back-side low-elasticity sections 42, 43 have portions that overlap with the widthwise ends of the ventral-side low-elasticity sections 22, 23 in the thickness direction.

[0094] This allows the flap portion 4 of the back portion 1B to be easily fastened to the back portion 1A of the tape-type diaper cover 1, so that the ventral low-elasticity portions 22, 23 and the back low-elasticity portions 42, 43 form a continuous annular shape, as shown in Figures 3 and 5. In the pants-type diaper cover 1, the ventral low-elasticity portions 22, 23 or their extensions and the back low-elasticity portions 42, 43 or their extensions form a continuous annular shape. This allows the ventral low-elasticity portions 22, 23 and the back low-elasticity portions 42, 43 to be positioned so as to surround the wearer's waist. The roughly annular ventral low-elasticity portions 22, 23 and the back low-elasticity portions 42, 43 are fixed by the wearer's hip bones in the armpits and pulled outward in the width direction, creating a taut state. This prevents the diaper cover 1 from shifting out of position around the waist. Furthermore, the abdominal low-elasticity sections 22, 23 can support the abdomen, and the back low-elasticity sections 42, 43 can support the buttocks, thereby preventing the diaper cover 1 from shifting in position due to movements of the abdomen or buttocks.

[0095] Furthermore, as shown in Figure 1, it is preferable that at least a portion of the boundary B2 between the back-side stretchable portion 41 and the back-side low-stretchable portions 42, 43 is inclined from the back side to the ventral side (crotch side) in the longitudinal direction from the end portion in the width direction toward the center portion.

[0096] By inclining the back-side low-elasticity portions 42, 43 in the same manner as the ventral-side low-elasticity portions 22, 23, the ventral-side low-elasticity portions 22, 23 and the back-side low-elasticity portions 42, 43 tend to be connected to form a ring when worn. As a result, as described above, the ventral-side low-elasticity portions 22, 23 and the back-side low-elasticity portions 42, 43 tend to be fixed to the wearer's hip bones at their sides, preventing the diaper cover 1 from shifting in position around the waist. Furthermore, the back-side low-elasticity portions 42, 43 tend to be kept taut outward and upward in the width direction toward the wearer's hip bones at their sides, which tends to help the back-side low-elasticity portions 42, 43 maintain a state in which they support the wearer's buttocks.

[0097] Figures 10A and 10B are views showing how the length of the leg openings LH is adjusted using the snap buttons 50. The left views of Figures 10A and 10B are schematic plan views of the diaper cover 1 as seen from the non-skin side, and the right views of Figures 10A and 10B are schematic cross-sectional views of the diaper cover 1. Figures 11A and 11B are explanatory views of the position of the size adjustment member 10. Figure 11A is a view as seen from the non-skin side, and Figure 11B is a view as seen from the skin side.

[0098] The diaper cover 1 is provided with a "size adjustment section" for adjusting the longitudinal length of the diaper cover 1 (main body member 2) in the crotch area, which is located between the wearer's legs when worn. The crotch area refers to the ventral central region 1A2 and the dorsal central region 1B2 when the diaper cover 1 is divided into four equal parts in the longitudinal direction. The diaper cover 1 has a pair of snap buttons 50 and a size adjustment member 10 as the size adjustment section.

[0099] As shown in FIG. 10A , a pair of snap buttons 50 are provided on both widthwise sides of the diaper cover 1. The snap buttons 50 are composed of a male button 51 and a mating female button 52. The projections and recesses (engagement portions) of the male button 51 and the female button 50 are exposed on the non-skin-facing side of the main body member 2. The longitudinal length of the diaper cover 1 (the length of the leg openings LH) can be adjusted by engaging the snap buttons 50. For example, when the snap buttons 50 are not fastened ( FIG. 10A ), the longitudinal length L1 from the end of the ventral leg stretchable portion 31 to the end of the dorsal leg stretchable portion 32 is relatively long. On the other hand, when the snap buttons 10 are fastened, a portion of the main body member 2 is folded as shown in the right diagram of FIG. 10B . Therefore, the longitudinal length L2 from the end of the ventral leg stretchable portion 31 to the end of the dorsal leg stretchable portion 32 is shorter than the length L1 in FIG. 10A .

[0100] Therefore, the longitudinal length of the diaper cover 1 (the length of the leg openings LH) can be adjusted according to the wearer's body type (leg circumference). This reduces the likelihood of gaps forming between the wearer's legs and the diaper cover 1, thereby suppressing leakage through the leg openings LH. Since the size can be adjusted according to the wearer's body type, the diaper cover 1 can be used for a long period of time, regardless of the wearer's (infant's) growth.

[0101] The size adjusting member 10 is a tab member having a rectangular planar shape, and has a fixed part 11 that is inseparably fixed to the diaper cover 1, and a detachable part 12 that is detachably fastened to the non-skin side of the diaper cover 1. The fixed part 11 is provided on the back side of the detachable part 12 in the longitudinal direction.

[0102] The provision of the size adjustment member 10 allows the user (parent, etc.) to grasp and pull the size adjustment member 10 after putting the diaper cover 1 on the wearer, thereby securing the removable portion 12 more ventrally (upper). This shortens the length of the main body member 2 at the location where the size adjustment member 10 is located and in its vicinity. In other words, the main body member 2 can be pulled ventrally from the rear of the fastening portion 11 while a portion of the main body member 2 is pinched between the fastening portion 11 and the removable portion 12. This prevents the diaper cover 1 from loosening in the wearer's crotch area. This allows the absorbent pad inside the diaper cover 1 to fit snugly against the wearer's excretory opening, thereby preventing leakage of body waste.

[0103] The size adjustment member 10 is preferably provided in the center of the diaper cover 1 in the width direction. This allows for direct adjustment of the slack in the diaper cover 1 relative to the wearer's crotch region. The size adjustment member 10 is preferably provided between a pair of snap buttons 50 in the width direction, with the fixing portion 11 being provided on the longitudinal back side of the snap buttons 50 in the longitudinal direction. This allows the size adjustment member 10 to be positioned so as to straddle the fold line F1 formed by fastening the snap buttons 50, as shown in FIG. 11A . This makes it difficult for the fold line F1 to open, and makes it easier to maintain the length of the diaper cover 1 adjusted by the snap buttons 50.

[0104] However, without being limited to the above, the diaper cover 1 may not have a size adjustment portion, or may have only one of the snap buttons 50 and the size adjustment member 10. Furthermore, the size adjustment portion is not limited to the snap buttons 50 and the tab-shaped size adjustment member 10. For example, the size adjustment portion may be a hook-and-loop fastener with a male and female member instead of the snap buttons 50, thereby adjusting the longitudinal length of the diaper cover 1. Alternatively, the longitudinal length of the diaper cover 1 may be adjusted by providing strings or elastic cords at the folded portions of the fabric constituting the diaper cover 1. Furthermore, instead of the size adjustment member 10, an elastic member (rubber) or stretchable fabric may be provided in the crotch portion of the diaper cover 1 in a longitudinally stretched state. This allows the longitudinal length of the diaper cover 1 to be adjusted when worn, improving the fit of the diaper cover 1 around the wearer's crotch region.

[0105] The diaper cover 1 of this embodiment is made of a single layer of fabric, excluding the folded-over end portions, and therefore has high air permeability in the thickness direction. Specifically, the crotch area, which is located under the wearer's crotch when worn, has an air permeability of 10 m / s. ３ / m ２ / min or more, 100m ３ / m ２ The crotch portion refers to the ventral central region 1A2 and the dorsal central region 1B2 when the diaper cover 1 is divided into four equal parts in the longitudinal direction.

[0106] This will increase the air permeability to 10m ３ / m ２ / min, the diaper cover 1 has better breathability and the inside of the diaper cover 1 is less likely to become stuffy. In particular, stuffiness in the crotch area where the absorbent pad absorbs excrement can be suppressed, improving comfort. ３ / m ２ / min or more, the strength (durability) of the diaper cover 1 during use is ensured. For example, the diaper cover 1 is less likely to be damaged even after repeated washing, allowing the diaper cover 1 to be used for a long period of time. However, the diaper cover 1 is not limited to the above, and may have a configuration in which multiple fabrics are layered in the thickness direction, or the breathability may be outside the above range.

[0107] The air permeability can be measured using a KES-F8-AP1 air permeability tester manufactured by Kato Tech Co., Ltd. First, a sample is cut out from the target area of ​​the diaper cover 1, for example, with a size of approximately 100 mm in the longitudinal direction x 100 mm in the transverse direction. Next, the sample is set in the air permeability tester, and the air resistance value is measured. The air resistance value is then calculated as the air permeability (m ３ / m ２ The average value of the air permeability measured for a number of different samples (for example, five samples) is used.

[0108] The diaper cover 1 is also used in combination with an absorbent pad. For this reason, it is preferable that the diaper cover 1 does not have a waterproof layer. This improves the dehydration effect during washing. The absence of a waterproof layer also improves breathability, allowing air to easily pass through the diaper cover 1. This makes it easier for the diaper cover 1 to dry after washing. Furthermore, the good breathability of the diaper cover 1 prevents the inside of the diaper cover 1 from becoming stuffy. This improves comfort when worn.

[0109] Examples of waterproof layers include fabrics (sheet members) made of non-hydrophilic fibers such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), and polyethylene terephthalate (PET), and hydrophilic fabrics that have been treated with a water-repellent coating.

[0110] FIG. 12 is a plan view of a modified diaper cover 1. FIG. 13 is a side view of the modified diaper cover 1 when worn. In the diaper cover 1 illustrated in FIG. 1 , fastening portions 3 (e.g., male hook-and-loop fasteners) are provided at portions of both widthwise ends of the back portion 1B. That is, the fastening portions 3 are provided separately from the fabric (main body member 2) that constitutes the diaper cover 1. In the modified diaper cover 1, both widthwise ends of the back portion 1B are formed of fabric 44 (e.g., fabric having minute hook members on the skin-facing side) that can be fastened to the non-skin-facing side of the ventral portion 1A. Furthermore, both widthwise ends of the ventral portion 1A are also formed of fabric 24 that can be fastened to the back-side fabric 44. In this case, as shown in FIG. 13 , the fastening area between the ventral portion 1A (fabric 24) and the flap portion 4 (fabric 44) of the back portion 1B is increased. Therefore, the flap portion 4 of the back portion 1B can be securely fastened to the ventral portion 1A.

[0111] Furthermore, it is desirable that the abdominal-side fabric 24 stretch less in the width direction than the abdominal-side stretchable portion 21, and that the area where the fabric 24 is provided is included as part of the abdominal-side low-stretchable portion 23. Similarly, it is desirable that the dorsal-side fabric 44 stretch less in the width direction than the dorsal-side stretchable portion 41, and that the area where the fabric 44 is provided is included as part of the dorsal-side low-stretchable portion 43. This makes it easier for the abdominal-side low-stretchable portion 23 (fabric 24) and the dorsal-side low-stretchable portion 43 (fabric 44) to be fixed to the hip bones in the armpits of the wearer, and the cloth diaper cover is less likely to slip out of position.

[0112] In the diaper cover 1 of the above-described modified example, the fabric 44 constituting both widthwise ends of the longitudinal back portion 1B corresponds to the fastening portion. As shown in Fig. 12, when the diaper cover 1 is unfolded and stretched, it is preferable that at least a portion of the region (the abdominal-side fabric 24 that can be fastened to the back-side fastening portion 44) of the longitudinal abdominal portion 1A be provided in a region that is widthwise outward of the abdominal-side stretchable portion 21 and is more abdominal than the end of the back (crotch) side of the abdominal-side stretchable portion 21 in the longitudinal direction (in the region defined by lines La and Lb).

[0113] 13, the fastening portion (fabric 44) on the back side can be fastened at a position close to the abdominal stretchable portion 21 in the width direction. Therefore, when putting on the diaper cover 1, the abdominal portion 1A can be easily stretched and fastened to the back portion 1B, improving the ease of putting on the diaper cover 1. Furthermore, even when the abdominal stretchable portion 21 stretches and contracts in response to the movement of the wearer's abdomen, the abdominal portion 1A (fabric 24) in the vicinity thereof is firmly fastened to the fastening portion (fabric 44) of the back portion 1B, making it less likely for the diaper cover 1 to shift position.

[0114] The configuration is not limited to the above-described configuration in which the ventral fabric 24 and the back fabric 44 can be locked to each other. For example, a male hook-and-loop fastener member may be provided in the area defined by the ventral line La and the line Lb. Then, a member (fabric or a female hook-and-loop fastener member) that can be locked to the male hook-and-loop fastener member may be provided as a locking member at both widthwise ends of the back portion 1B. In this case, the area of ​​the ventral portion 1A where the male hook-and-loop fastener member is provided becomes an area that can be locked to the locking member on the back side. In this case, the ventral portion 1A and the back portion 1B are locked to each other in the area defined by the line La and the line Lb, thereby achieving the above-described effect.

[0115] The cloth diaper cover 1 of the first embodiment has been described above. The cloth diaper cover 1 of the first embodiment has a ventral stretchable section 21 and a pair of ventral low-stretch sections 22, 23, and at least a portion of the boundary B1 between them is inclined from the ventral side to the dorsal side in the longitudinal direction from the widthwise end to the center. Therefore, the cloth diaper cover 1 does not necessarily have to have, for example, a dorsal stretchable section 41 or leg stretchable sections (31-33).

[0116] Second Embodiment The diaper cover of the second embodiment is a diaper cover to be used in combination with an absorbent pad, and includes the following configuration described in the first embodiment. Therefore, the diaper cover of the second embodiment will be described with reference to FIG. 1 . The diaper cover of the second embodiment has, in an unfolded and stretched state, longitudinal, width, and thickness directions that are perpendicular to one another, and has a "ventral stretchable section 21" that is stretchable in the longitudinal and width directions and is located at the ventral end in the longitudinal direction and in the center in the width direction, a "dorsal stretchable section 41" that is stretchable in the longitudinal and width directions and is located at the dorsal end in the longitudinal direction and in the center in the width direction, low-stretch sections (22, 23, 42, 43) that are continuously located in the longitudinal direction from a position adjacent to the ventral stretchable section 21 to a position adjacent to the dorsal stretchable section 41, and leg-surrounding stretchable sections (31-33) that are stretchable in the longitudinal and width directions and are located adjacent to both widthwise ends of the low-stretch sections (22, 23, 42, 43). Furthermore, at least a portion of the boundary B1 between the ventral stretchable portion 21 and the low stretchable portion (22, 23, 42, 43) is inclined from the ventral side to the dorsal side in the longitudinal direction from the end portion in the width direction toward the center portion.

[0117] Furthermore, the average value of the force required to stretch the ventral stretchable portion 21 of unit length in the longitudinal direction to a predetermined length in the width direction, and the average value of the force required to stretch the dorsal stretchable portion 41 of unit length in the longitudinal direction to a predetermined length in the width direction are smaller than the average value of the force required to stretch the low stretchable portions (22, 23, 42, 43) of unit length in the longitudinal direction to a predetermined length in the width direction (this comparison can be made using the method for comparing ease of stretch described above).

[0118] That is, the diaper cover of the second embodiment has low-elasticity sections (22, 23, 42, 43) that are generally X-shaped and form a framework. The ventral stretchable section 21, the dorsal stretchable section 41, and the leg stretchable sections (31-33) are formed along the edges defined by the low-elasticity sections (22, 23, 42, 43). With this type of diaper cover, the low-elasticity sections (22, 23, 42, 43) are in a taut state when worn, thereby supporting the wearer's abdomen and buttocks. Furthermore, the low-elasticity sections (22, 23, 42, 43) are easily secured to the wearer's hip bones, making it difficult for the diaper cover to slip out of position. Furthermore, the ventral stretchable section 21, the dorsal stretchable section 41, and the leg stretchable sections (31-33) conform to the wearer's movements, thereby reducing the feeling of pressure on the wearer and improving comfort.

[0119] The diaper cover of the second embodiment may be made of cloth or may be made of a material other than cloth, such as a nonwoven fabric commonly used in absorbent articles such as disposable diapers.

[0120] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

[0121] For example, the diaper cover of the first embodiment and the diaper cover of the second embodiment are not limited to being used in combination with an absorbent pad, but can also be used in combination with a diaper. Specific examples of diapers include disposable tape-type diapers, disposable pants-type diapers, and disposable diapers with a tape-type configuration on one side in the width direction and a pants-type configuration on the other side. When the diaper cover of the first embodiment and the diaper cover of the second embodiment are used in combination with a diaper, the same effects as when used in combination with an absorbent pad can be obtained.

[0122] DESCRIPTION OF SYMBOLS 1 (Cloth) diaper cover, 2 Main body member, 3 Fastening portion, 4 Flap portion, 10 Size adjustment member (size adjustment portion), 11 Fixing portion, 12 Detachable portion, 21 Abdominal stretch portion, 22 Abdominal low stretch portion, 23 Abdominal low stretch portion, 31 Abdominal leg stretch portion, 32 Dorsal leg stretch portion, 33 Crotch-side leg stretch portion, 41 Dorsal stretch portion, 42 Dorsal low stretch portion, 43 Dorsal low stretch portion, 50 Snap button (size adjustment portion),

Claims

1. A cloth diaper cover to be used in combination with an absorbent pad or diaper, which, in an unfolded and stretched state, has longitudinal, width, and thickness directions that are perpendicular to one another, and has a ventral stretchable section that is stretchable in the longitudinal and width directions and is located at the ventral end in the longitudinal direction and at the center in the width direction, and a pair of ventral low-stretch sections lined up in the width direction, wherein the ventral low-stretch section is adjacent to the ventral stretchable section from the dorsal side in the longitudinal direction, the average value of the force required to stretch the ventral stretchable section of a unit length in the longitudinal direction to a specified length in the width direction is smaller than the average value of the force required to stretch the ventral low-stretch section of a unit length in the longitudinal direction to the specified length in the width direction, and at least a part of the boundary between the ventral stretchable section and the ventral low-stretch section is inclined from the ventral side to the dorsal side in the longitudinal direction from the end in the width direction to the center.

2. The cloth diaper cover according to claim 1, wherein the pair of low-elasticity abdominal portions are continuous in the width direction.

3. A cloth diaper cover as claimed in claim 2, characterized in that, in an unfolded and stretched state, when the cloth diaper cover is divided into four equal parts in the longitudinal direction, the second region from the ventral side is defined as the ventral central region, the pair of ventral low-elasticity parts extend from the boundary to the ventral central region in the longitudinal direction and are arranged across the centre of the cloth diaper cover in the width direction.

4. A cloth diaper cover as claimed in any one of claims 1 to 3, characterized in that, in an unfolded and stretched state, the cloth diaper cover is divided into four equal parts in the longitudinal direction, and in the end region on the ventral side thereof, a ventral leg-opening stretchable section is provided along the leg-openings, which is stretchable in the longitudinal direction and the width direction.

5. A cloth diaper cover as claimed in claim 4, wherein the average value of the force required to stretch the abdominal stretchable portion of said unit length in the longitudinal direction to said specified length in the width direction is smaller than the average value of the force required to stretch the abdominal stretchable portion of said unit length in the width direction to said specified length in the longitudinal direction, and the average value of the force required to stretch the abdominal stretchable portion of said unit length in the longitudinal direction to said specified length in the width direction is greater than the average value of the force required to stretch the abdominal stretchable portion of said unit length in the width direction to said specified length in the longitudinal direction.

6. A cloth diaper cover as claimed in claim 4, characterized in that in an unfolded and stretched state, when the cloth diaper cover is divided into four equal parts in the longitudinal direction, a back-side leg stretchable section is provided along the leg openings at the back end region, which is stretchable in the longitudinal direction and the width direction, and the belly-side leg stretchable section and the back-side leg stretchable section are continuous via a crotch-side leg stretchable section which is stretchable in the longitudinal direction and the width direction.

7. A cloth diaper cover as claimed in claim 6, wherein the sheet member constituting the ventral leg stretchable portion and the sheet member constituting the crotch leg stretchable portion are separate sheet members, and the sheet member constituting the dorsal leg stretchable portion and the sheet member constituting the crotch leg stretchable portion are an integrated sheet member.

8. A cloth diaper cover as claimed in any one of claims 1 to 3, characterized in that, in an unfolded and stretched state, a pair of fastening parts are provided at both ends in the width direction of the longitudinal back part, and the fastening force between the ventral low-elasticity part and the fastening parts is stronger than the fastening force between the area adjacent to the ventral low-elasticity part and the fastening parts.

9. A cloth diaper cover as claimed in any one of claims 1 to 3, characterized in that, in an unfolded and stretched state, a pair of fastening portions are provided at both widthwise ends of the longitudinal back portion, and at least a part of an area that can be fastened to the fastening portions is provided in an area of ​​the longitudinal ventral portion that is outboard of the ventral stretchable portion in the widthwise direction and on the ventral side of the back end of the ventral stretchable portion in the longitudinal direction.

10. A cloth diaper cover as claimed in any one of claims 1 to 3, characterized in that a back stretchable part is provided at the end of the back side in the longitudinal direction, which is stretchable in the longitudinal direction and the width direction.

11. A cloth diaper cover as described in claim 10, wherein the average value of the force required to stretch the back stretchable portion of the unit length in the longitudinal direction to the specified length in the width direction is greater than the average value of the force required to stretch the ventral stretchable portion of the unit length in the longitudinal direction to the specified length in the width direction.

12. A cloth diaper cover as claimed in claim 10, comprising a pair of low-stretch back sections adjacent to the back stretch section and aligned in the width direction, wherein the average value of the force required to stretch the back stretch section of the unit length in the longitudinal direction to the specified length in the width direction is smaller than the average value of the force required to stretch the back low-stretch section of the unit length in the longitudinal direction to the specified length in the width direction, and wherein when the unfolded and stretched cloth diaper cover is folded in half at the centre in the longitudinal direction, the widthwise end of the low-stretch back section has a portion that overlaps with the widthwise end of the low-stretch belly section when viewed in the thickness direction.

13. A cloth diaper cover as described in claim 12, wherein at least a portion of the boundary between the back-side stretch section and the back-side low-stretch section is inclined from the end in the width direction toward the center, from the back side toward the ventral side in the longitudinal direction.

14. A cloth diaper cover as claimed in any one of claims 1 to 3, characterized in that a size adjustment section is provided in the crotch area, which is located between the wearer's legs when worn, for adjusting the longitudinal length of the cloth diaper cover.

15. A cloth diaper cover according to any one of claims 1 to 3, wherein the air permeability in the thickness direction is 10 m / s or more in the crotch area located under the crotch of a wearer when worn. ３ / m ２ / min or more, 100m ３ / m ２ / minute or less.

16. A cloth diaper cover according to any one of claims 1 to 3, characterized in that it does not have a waterproof layer.

17. A diaper cover to be used in combination with an absorbent pad or a diaper, which in an unfolded and stretched state has longitudinal, width, and thickness directions that are perpendicular to one another, and has a ventral stretchable section that is provided at the ventral end in the longitudinal direction and at the center in the width direction and is stretchable in the longitudinal direction and the width direction, a dorsal stretchable section that is provided at the dorsal end in the longitudinal direction and at the center in the width direction and is stretchable in the longitudinal direction and the width direction, a low-stretch section that is provided continuously in the longitudinal direction from a position adjacent to the ventral stretchable section to a position adjacent to the dorsal stretchable section, and leg-around stretchable sections that are provided adjacent to both side ends in the width direction of the low-stretchable section and are stretchable in the longitudinal direction and the width direction, the average value of the force required to stretch the ventral stretchable portion of a unit length in the longitudinal direction to a predetermined length in the width direction and the average value of the force required to stretch the dorsal stretchable portion of a unit length in the longitudinal direction to a predetermined length in the width direction are smaller than the average value of the force required to stretch the low stretchable portion of a unit length in the longitudinal direction to the predetermined length in the width direction, and at least a portion of the boundary between the ventral stretchable portion and the low stretchable portion is inclined from the ventral side to the dorsal side in the longitudinal direction from the end portion toward the center in the width direction.

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