JP7366587B2 - Pants type disposable diaper - Google Patents

Description

The present invention relates to a pants-type disposable diaper.

Conventionally, pants-type disposable diapers are known as pants-type absorbent articles. Since such pants-type disposable diapers generally have a high fit, problems such as stuffiness due to sweating and skin irritation when worn may occur. In order to solve this problem, disposable diapers have been proposed in which a sweat-absorbing sheet is provided around the waist to absorb sweat of the wearer. For example, Patent Document 1 discloses a disposable diaper that includes a breathable sweat-absorbing sheet on at least one end flap in the front and rear waist regions of the diaper.

Japanese Patent Application Publication No. 2000-189454

In the pants-type diaper of Patent Document 1, a large number of holes 16 are formed in the breathable sweat-absorbent sheet 9, thereby improving the breathability of the area where the sweat-absorbent sheet 9 is arranged. However, by providing the perforations 16 in the sweat absorbent sheet 9, the rigidity of the sweat absorbent sheet 9 itself decreases, so when the front and rear waist regions 3 and 4 contract, the sweat absorbent sheet 9 also contracts, and many In some cases, wrinkles were formed. In this case, it is difficult for the sweat absorbent sheet 9 to contact the wearer's skin in a planar (curved) manner, and the sweat absorbing function of the sweat absorbent sheet 9 may be inhibited.

The present invention has been made in view of the conventional problems as described above, and an object thereof is to provide a pants-type disposable diaper having good sweat absorption performance.

The main invention for achieving the above purpose is:
It has a vertical direction and a horizontal direction that intersect with each other,
an absorbent body,
a waist portion comprising: an elastic member that expands and contracts in the left-right direction; a skin-side sheet disposed on the skin side of the elastic member; and a non-skin side sheet disposed on the non-skin side of the elastic member;
A pants-type disposable diaper comprising:
The waist portion has a weak sweat absorbing portion and a sweat absorbing portion that absorbs sweat of the wearer more easily than the weak sweat absorbing portion,
In the weak sweat absorption part, an opening is provided in at least one of the skin side sheet and the non-skin side sheet,
The area of the opening provided per unit area of the weak sweat absorption part is larger than the area of the opening provided per unit area of the sweat absorption part,
The waist part has a ventral waist part and a dorsal waist part,
The ventral waist portion and the dorsal waist portion are connected to each other by a pair of side locks provided at both ends in the left and right direction,
The pants-type disposable diaper is characterized in that the weak sweat-absorbing portion is provided between the sweat-absorbing portion and the side lock in the left-right direction.
Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, it is possible to provide a pants-type disposable diaper having good sweat absorption performance.

FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (diaper 1). FIG. 2 is a plan view of the diaper 1 in an expanded and stretched state. 3 is a sectional view taken along line II in FIG. 2. FIG. FIG. 4A is a schematic cross-sectional view of the pant-shaped diaper 1 stretched in the left-right direction when viewed from the upper side in the vertical direction (the side of the waist opening BH). FIG. 4B is a schematic cross-sectional view of the pant-shaped diaper 1 in a natural state after being released from the stretched state in FIG. 4A, as viewed from the upper side in the vertical direction (the side of the waist opening BH). FIG. 3 is a plan view of a modified example of the diaper 1 in an expanded and stretched state. FIG. 2 is a plan view of the diaper 2 in an expanded and stretched state.

From the description of this specification and the attached drawings, at least the following matters will become clear.
The absorbent main body has vertical and horizontal directions that intersect with each other, an elastic member that expands and contracts in the horizontal direction, a skin-side sheet disposed on the skin side of the elastic member, and a non-skin side of the elastic member. A pants-type disposable diaper comprising: a non-skin-side sheet disposed on the skin side; and a waist portion including a weak sweat absorbing portion, and the waist portion absorbing more sweat of a wearer than the weak sweat absorbing portion 1. A pants-type disposable diaper, characterized in that the weak sweat absorbing section is provided with an opening in at least one of the skin side sheet and the non-skin side sheet.

According to such a pants-type disposable diaper, since the weak sweat-absorbing part is provided with an opening, its rigidity is lower than that of the sweat-absorbing part, and when the diaper is worn, the weak sweat-absorbing part expands horizontally Easy to shrink. By contracting the weak sweat-absorbing portion, the sweat-absorbing portion is relatively easily extended in the left-right direction, making it easier to maintain the planar shape. Therefore, the sweat absorbing portion fits flush against the wearer's skin, making it easier to efficiently absorb the wearer's sweat. Thereby, a pants-type disposable diaper having good sweat absorption performance can be realized.

In such a pants-type disposable diaper, the waist part has a ventral waist part and a back waist part, and the sweat absorbing part has one of the ventral waist part and the dorsal waist part. It is desirable that the

According to such a pants-type disposable diaper, the amount of contraction on the side where the sweat absorbing section is not provided is large among the ventral and dorsal waist portions, and the amount of shrinkage on the side where the sweat absorbing section is provided is smaller. becomes smaller. Therefore, the portion where the sweat absorbing section is provided is more easily stretched, and the sweat absorbing section can easily maintain its planar shape. This can improve the sweat absorbency of the diaper.

In such a pants-type disposable diaper, the waist portion has a ventral waist portion and a back waist portion, and the sweat absorption portion is provided on both the ventral waist portion and the back waist portion. It is desirable that the

According to such a pants-type disposable diaper, since sweat absorbing parts are provided on both sides of the dorsal and ventral waist regions, the sweat absorption performance is improved on both sides of the back and abdomen, and the sweat absorption performance of the diaper as a whole is improved. I can do it.

In such a pants-type disposable diaper, it is desirable that the area of the sweat absorbing portion provided on the back waist portion be larger than the area of the sweat absorbing portion provided on the ventral waist portion.

According to such a pants-type disposable diaper, by making the area of the sweat-absorbing part on the back side larger than the area of the sweat-absorbing part on the ventral side, the area of high rigidity on the back side becomes larger compared to the ventral side. Cheap. Therefore, the dorsal sweat-absorbing part is less likely to contract than the ventral sweat-absorbing part and can easily maintain its planar shape, making it easier to fit the wearer's skin face-to-face. This can improve the sweat absorbency of the diaper.

In such a pants-type disposable diaper, it is desirable that the sweat absorption section provided on the dorsal waistline has a higher rigidity than the sweat absorption section provided on the ventral waistline.

According to such a pants-type disposable diaper, the sweat-absorbing portion on the back side is less likely to contract than on the ventral side. Therefore, the sweat-absorbing portion easily maintains its planar shape on the back side, making it easier to fit the wearer's skin face-to-face. This can improve the sweat absorbency of the diaper.

In such a pants-type disposable diaper, the waist part has a ventral waist part and a back waist part, and the ventral waist part and the back waist part are arranged at both ends in the left and right direction. It is preferable that the weak sweat absorbing portion is connected to each other by a pair of provided side locks, and that the weak sweat absorbing portion is provided between the sweat absorbing portion and the side lock in the left-right direction.

According to such a pants-type disposable diaper, the weak sweat-absorbing portion between the sweat-absorbing portion and the side locking in the left-right direction contracts, so that the sweat-absorbing portion is pulled outward in the left-right direction (toward the side locking side). This makes it easier to maintain the planar shape. As a result, when the diaper is worn, the sweat-absorbing portion can easily fit the surface of the wearer's skin, and the sweat-absorbing performance of the diaper can be improved.

In such a pants-type disposable diaper, it is desirable that the area of the openings provided per unit area of the weak sweat absorbing portion be larger than the area of the openings provided per unit area of the sweat absorbing portion.

According to such a pants-type disposable diaper, the rigidity of the weak sweat absorbing section is lower than that of the sweat absorbing section, and when the diaper contracts, the amount of contraction of the weak sweat absorbing section is greater than the amount of contraction of the sweat absorbing section. Therefore, the sweat absorbing portion is relatively easily extended in the left-right direction, and the planar shape is easily maintained. As a result, when the diaper is worn, the sweat-absorbing portion can easily fit the surface of the wearer's skin, and the sweat-absorbing performance of the diaper can be improved.

In such a pants-type disposable diaper, it is desirable that the sweat absorbing portion is not provided with the opening.

According to such a pants-type disposable diaper, the sweat-absorbing part without openings has higher rigidity than the weak sweat-absorbing part with openings, and when the weak sweat-absorbing part contracts, the sweat-absorbing part becomes more rigid than the weak sweat-absorbing part with openings. This makes it easier to maintain a planar shape. Thereby, the sweat absorption performance of the diaper can be further improved.

In such a pants-type disposable diaper, it is desirable that the sweat absorbing portion is provided with a breathable sweat absorbing sheet separate from the skin side sheet and the non-skin side sheet.

According to such a pants-type disposable diaper, the sweat-absorbing part is laminated with a breathable sweat-absorbing sheet that is separate from the sheet members (skin-side sheet and non-skin-side sheet) that make up the back waist area. The material rigidity becomes higher than the material rigidity of the weak sweat absorption part. Therefore, the sweat-absorbing portion easily maintains its planar shape and fits the wearer's skin surface-wise, thereby further improving the sweat-absorbing performance of the diaper.

In such a pants-type disposable diaper, it is preferable that the opening is a through hole that penetrates the skin side sheet and the non-skin side sheet in the thickness direction.

According to such a pants-type disposable diaper, the rigidity of the weak sweat absorbing portion is lower than that in the case where the opening is a non-through hole, and the weak sweat absorbing portion is more likely to contract. Therefore, the sweat absorbing part becomes relatively easy to extend in the left-right direction, and it becomes easy to maintain the planar shape. Thereby, the sweat absorption performance of the diaper can be further improved.

In such a pants-type disposable diaper, it is preferable that the opening is provided in a region above the sweat absorption section in the vertical direction.

According to such a pants-type disposable diaper, the rigidity of the upper end portion of the waist portion is low, and when the waist portion contracts, unevenness (wrinkles) in the thickness direction is likely to be formed in the upper end portion. Therefore, heat and moisture can easily move through the gap between the wearer's skin and the wrinkles, and it is possible to suppress stuffiness and skin irritation caused by sweating.

In such a pants-type disposable diaper, it is desirable that the opening is not provided in a region where the absorbent main body and the waist portion overlap.

According to such pants-type disposable diapers, since the absorbent body and the opening do not overlap, the user does not have to worry about urine or other excrement passing through the opening and leaking to the outside. Difficult to cause.

In such a pants-type disposable diaper, it is desirable that the waist portion has a planar stretchable sheet that stretches at least in the left-right direction.

According to such a pants-type disposable diaper, the elastic sheet having a predetermined width in the vertical direction is provided, thereby making it difficult for the waist portion to fold up in the vertical direction. Therefore, good fit can be achieved. In addition, since the waist portion does not easily fold up, the opening is less likely to be blocked, and it is possible to prevent stuffiness and rash from occurring when wearing the diaper.

In such a pants-type disposable diaper, the waist portion has a ventral waist portion and a back waist portion, and the sweat absorbing portion is provided on either one of the ventral waist portion and the back waist portion. It is desirable that the stretchable sheet is provided on the other side, and that the stretchable sheet is provided with an opening.

According to such a pants-type disposable diaper, the openings are provided on the other side of the ventral waist region and the dorsal waist region, so that the rigidity and stress of the elastic sheet are reduced, and wrinkles (unevenness) are formed. evaporation of sweat is promoted. On one side, the sweat-absorbing portion is relatively easily stretched due to contraction of the elastic sheet, and sweat-absorbing properties are improved.

===Embodiment===
EMBODIMENT OF THE INVENTION Hereinafter, as a pants-type disposable diaper according to the present invention, an embodiment will be described using a pants-type disposable diaper 1 for infants (hereinafter also referred to as "diaper 1") as an example. However, the pants-type absorbent article according to the present invention can be used not only as a disposable diaper for infants but also as a disposable diaper for adults.

===Configuration of pants-type disposable diaper 1===
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (diaper 1). FIG. 2 is a plan view of the diaper 1 in the unfolded and stretched state. FIG. 3 is a sectional view taken along line II in FIG. 2.

In the pants-shaped state shown in FIG. 1, the diaper 1 has vertical and horizontal directions that intersect with each other, and is formed with a waist opening BH and a pair of leg openings LH. In the vertical direction, the waist opening BH side is the upper side, and the crotch side is the lower side. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are laminated is called the thickness direction, the side that comes into contact with the wearer in the thickness direction is called the skin side, and the side that does not come into contact with the wearer is called the skin side. This is called the non-skin side.

The diaper 1 also includes three members that are rectangular in plan view: an absorbent main body 10, a ventral waist portion 20, and a back waist portion 30. The ventral waist portion 20 is a portion that is placed on the wearer's abdomen, and the back waist portion 30 is a portion that is placed on the wearer's back.

In the unfolded diaper 1 shown in FIG. 2, the ventral waist portion 20 and the back waist portion 30 are arranged such that their longitudinal directions extend along the left-right direction of the diaper 1. One longitudinal end of the absorbent main body 10 is disposed at the center of the ventral waistline section 20 in the left-right direction, and the longitudinal end of the absorbent main body 10 is arranged at the center of the dorsal waistline section 30 in the left-right direction. The end portion on the other side in the direction is arranged.

Then, the absorbent main body 10 is folded in half approximately at the center in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 is along the vertical direction of the diaper 1, and both ends of the abdominal girth part 20 in the left-right direction of the diaper 1 are and both end portions of the back waist portion 30 are joined by heat welding, ultrasonic welding, etc., and a pair of side locks 5 are formed, resulting in the pants-shaped diaper 1 shown in FIG. 1.

As shown in FIG. 3, the absorbent main body 10 includes an absorbent core 11, a liquid-permeable top sheet 12 disposed closer to the skin than the absorbent core 11, and a liquid-permeable top sheet 12 disposed closer to the non-skin side than the absorbent core 11. It has a liquid-impermeable backsheet 13 and an exterior sheet 14 disposed on the non-skin side of the backsheet 13.

The absorbent body 11 includes an absorbent core 11A that absorbs and retains excreted liquid such as urine, and a liquid-permeable core wrap sheet 11B that covers the absorbent core 11A. An example of the absorbent core 11A is one in which liquid absorbent fibers such as pulp containing super absorbent polymer (SAP) are molded into a predetermined shape. The top sheet 12 is formed of, for example, a nonwoven fabric such as an air-through nonwoven fabric or a spunbond nonwoven fabric. The back sheet 13 is, for example, a liquid-impermeable and breathable film made of polyethylene or polypropylene. The exterior sheet 14 is formed of the same nonwoven fabric as the top sheet 12, for example.

Side sheets 15 are provided at both ends of the exterior sheet 14 in the left and right direction. The side sheet 15 extends further outward than the exterior sheet 14 in the left-right direction and is folded back inward with the outer ends 15es, 15es as folding positions, thereby forming the side flaps SF of the diaper 1.

As shown in FIG. 1, the side flaps SF are provided along the leg opening LH so as to protrude outward in the left-right direction. In this embodiment, between the side sheets 15, 15 folded in the thickness direction, a plurality of leg elastic members 17, 17, etc. made of thread rubber, etc. are each extended in the vertical direction (longitudinal direction). In this state, they are fixed at a predetermined interval in the left-right direction (width direction) (see FIG. 2). Thereby, stretchability along the up-down direction (longitudinal direction of the absorbent main body 10) is imparted to the side flap SF. That is, stretchability is provided along the leg opening LH.

Further, a pair of leakage prevention wall portions 70, 70 are provided on both sides of the absorber 11 in the left-right direction. One or more leak-proof wall elastic members 18 made of rubber thread or the like are fixed to the inner end portions of the leak-proof wall section 70 in the left-right direction in a state of being stretched in the vertical direction (longitudinal direction) (Fig. 2 reference). When the diaper 1 is worn, the leak-proof wall portion 70 stands up from both sides of the absorber 11 in the left-right direction toward the wearer's skin based on the elasticity of the leak-proof wall elastic member 18, thereby absorbing excrement. This suppresses leakage to the outside of the sexual body 10 (lateral leakage).

As shown in FIG. 3, the ventral waist section 20 and the dorsal waist section 30 each include skin-side sheets 21 and 31, non-skin-side sheets 22 and 32 laminated on the skin-side sheets 21 and 31, and a plurality of non-skin-side sheets 22 and 32, respectively. It has thread-like elastic members 23, 33.

The non-skin side sheets 22 and 32 are arranged closer to the non-skin side than the skin side sheets 21 and 31. The skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 are arranged closer to the non-skin side than the absorbent main body 10. Further, the upper ends 221 and 321 of the non-skin side sheets 22 and 32 are folded back downward in the vertical direction at the upper end 20eu of the ventral waistline part 20 and the upper end 30eu of the backside waistline part 30, respectively. The longitudinal ends of the absorbent main body 10 are covered from the skin side (see FIG. 3).

The skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 are non-stretchable sheets that do not substantially have stretchability in the left-right direction. The skin side sheets 21, 31 and the non-skin side sheets 22, 32 include SMS nonwoven fabrics (spunbond, meltblown, and spunbond nonwoven fabrics), spunbond nonwoven fabrics, air-through nonwoven fabrics, plastic sheets, perforated plastic sheets, and laminate sheets thereof. can be used.

The plurality of thread-like elastic members 23, 33 are arranged in a line in the vertical direction between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32, and are fixed in a stretched state in the left-right direction. Therefore, the ventral waist portion 20 and the back waist portion 30 expand and contract in the left-right direction to fit the wearer's waist. Examples of the thread-like elastic members 23 and 33 include thread-like elastic members (so-called thread rubber) such as rubber and spandex.

In the back waistline portion 30, a thread-like elastic member 33 is arranged from the upper end to the lower end. On the other hand, the thread-like elastic member 23 is not disposed at the upper end of the ventral waist portion 20, but instead a planar (band-shaped) elastic sheet 24 that stretches in the left-right direction is disposed.

By arranging the elastic sheet 24 without arranging the thread-like elastic member 23 at the upper end of the ventral waist portion 20, the upper end of the ventral waist portion 20 comes into close contact with the skin of the wearer. do. Therefore, local tightening can be suppressed, and linear marks caused by the rubber thread can be prevented from remaining. In particular, since the abdomen of an infant is protruding, it is preferable to use the elastic sheet 24 to suppress tightening of the abdominal girth portion 20.

Furthermore, the ease with which the waist opening BH can be expanded when the diaper 1 is worn is greatly influenced by the elasticity of the upper end portions of the waist portions 20 and 30. The stretchable sheet 24 has the property of being easy to stretch from a natural state and difficult to contract from a stretched state. Therefore, by arranging the elastic sheet 24 at the upper end of the ventral waist portion 20, it becomes easier to widen the waist opening BH when wearing the diaper 1, and after the waist portions 20 and 30 are fitted to the wearer. It can prevent abdominal tightening.

The elastic sheet 24 may be made of various materials, such as spunbond nonwoven fabric, air-through nonwoven fabric, needle punched nonwoven fabric, etc. made of elastic fibers with a mass of 10 to 40 g/m ² , more preferably 15 to 30 g/m ² . A stretchable fibrous nonwoven fabric manufactured by a known manufacturing method can be used. Elastic fibers are made from thermoplastic elastomers, rubber, etc., and especially when thermoplastic elastomers are used as raw materials, they can be melt-spun using an extruder in the same way as normal thermoplastic resins. Moreover, the fibers thus obtained are easy to heat-seal and are suitable as stretchable fiber nonwoven fabrics. Examples of thermoplastic elastomers include styrene elastomers, olefin elastomers, polyester elastomers, and polyurethane elastomers. These can be used alone or in combination of two or more. The stretchable sheet may be one that exhibits elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretching ratio of the elastic sheet 24 in the left-right direction is preferably about 1.2 times to 3.0 times.

Furthermore, in the region where the stretchable sheet 24 is provided, a plurality of openings 40 that penetrate the stretchable sheet 24 and the abdominal girth portion 20 (skin side sheet 21, non-skin side sheet 22) in the thickness direction, 40... are provided. This opening 40 has a function as a ventilation hole in the ventral waist portion 20. As a result, when wearing the diaper 1, sweat and heat of the wearer easily evaporates from the opening 40 to the outside of the diaper 1, effectively suppressing stuffiness in the ventral waist region 20 and irritation of the wearer's skin. be able to. In particular, the elastic sheet 24 is provided at the upper end of the ventral waist portion 20, making it easy to fit widely around the wearer's abdomen, so ensuring sufficient breathability will prevent the wearer from feeling uncomfortable. I try not to cause this to occur.

The opening 40 provided in the ventral waist portion 20 can be, for example, a circular hole with a diameter of about 1.5 mm, but the shape and size of the opening 40 are not limited to this and can be changed as appropriate. However, from the viewpoint of ensuring ventilation, the opening 40 is preferably a hole having a certain area in its natural state, and a linear cut such as a so-called slit is excluded.

Note that the "natural state" is a state when the diaper 1 is left for a predetermined period of time. For example, after taking out the diaper 1 in the product state from the package, the ventral waist section 20 and the dorsal waist section 30 are pulled outward on both sides in the left-right direction to bring the waist regions 20 and 30 into the "stretched state". After this continues for about 15 to 30 seconds, the diaper 1 is released from tension and placed on a flat surface such as a desk. The state after 5 minutes of being placed flat on a flat surface is defined as the natural state.

Further, the opening 40 does not necessarily need to penetrate the ventral waist portion 20 in the thickness direction. For example, the opening 40 may be provided in either the skin-side sheet 21 or the non-skin-side sheet 22. If at least one of the skin-side sheet 21 and the non-skin-side sheet 22 is provided with an opening 40, air permeability is increased compared to a case where no opening 40 is provided, so that the wearer does not feel uncomfortable. It can be made difficult.

Further, a predetermined region of the back waist portion 30 is provided with a sweat absorption portion 50 that easily absorbs sweat of the wearer compared to other regions.

<About the sweat absorption section 50>
The sweat absorption section 50 is provided in a predetermined area on the skin side of the back waist section 30, as shown by the hatched area in FIGS. 2 and 3, and absorbs sweat of the wearer more than other areas other than the sweat absorption section 50. This is the part that is easily absorbed. By providing the sweat absorbing section 50 on the skin side of the back waist section 30, sweat is easily absorbed in the wearer's back waist region, which tends to sweat a lot when wearing the diaper 1, thereby preventing stuffiness and rashes. can be easily suppressed.

The sweat absorbing section 50 in this embodiment includes, for example, a breathable sweat absorbing sheet 51 that is a sheet member formed of an upper layer containing at least 20% by weight of hydrophilic fibers and a lower layer of hydrophobic fibers integrally laminated thereon. It is formed by joining to the skin side of the dorsal waist portion 30. However, the breathable sweat absorbent sheet 51 may be a sheet member having a single layer structure containing at least 20% by weight of hydrophilic fibers.

As the hydrophilic fibers included in the breathable sweat-absorbing sheet 51, cellulose fibers such as rayon, sweat-absorbing polyester fibers whose fiber surfaces have been treated to make them hydrophilic, and the like can be used. Further, as fibers other than hydrophilic fibers, that is, hydrophobic fibers, polypropylene, polyester, polyethylene-polyester composite fibers, crimped composite fibers, etc. can be used. The sheet form of the breathable sweat-absorbent sheet 51 is not particularly limited, but may be a nonwoven fabric such as spunlace, needle punch, summer bond, spun bond, melt blown, chemical bond, etc. having a basis weight of 10 to 100 g/m2 and a fineness of 0.1 to 10 d. can be mentioned.

Note that the breathable sweat-absorbing sheet 51 is preferably a member of a different color from the skin-side sheet 31 and the non-skin-side sheet 32 that constitute the back waist portion 30. For example, when the skin-side sheet 31 is white, the breathable sweat-absorbent sheet 51 is configured in blue. In this way, it is possible to make it easier for the user (the wearer of the diaper 1 or the person who makes the diaper 1 to be worn) to visually recognize that the breathable sweat-absorbing sheet 51 is provided on the back waistline portion 30. Further, as shown in FIG. 2, it is preferable that the breathable sweat absorbent sheet 51 and the absorbent main body 10 at least partially overlap in the vertical direction. In other words, the breathable sweat absorbent sheet 51 is preferably arranged so as to be continuous with the absorbent main body 10 in the vertical direction. In this way, no gap is created between the breathable sweat-absorbing sheet 51 and the absorbent main body 10, making it easier to ensure good water absorption performance over a wide range on the back side.

The sweat absorption section 50 also applies a hydrophilic agent 52 (not shown) to a predetermined area on the skin side of the dorsal waist part 30, or applies a hydrophilic agent 52 to a predetermined area on the skin side of the dorsal waist part 30. It may be formed by joining sheet members (for example, nonwoven fabric) coated with 52. As the hydrophilic agent 52, a known hydrophilic agent used for absorbent articles such as disposable diapers can be used. Furthermore, the sweat absorbing portion 50 may be formed by compressing a predetermined region of the skin-side sheet 31. For example, if multiple pin embossments are applied to the shaded area in Figure 2, the gaps between the fibers that make up the sheet become narrower in the area where the pin embossments are formed, allowing moisture to penetrate through capillary action. It becomes easier and water absorption improves. Therefore, the sweat absorbing portion 50 can also be formed by such a pressing process.

In the diaper 1 of this embodiment, it is preferable that the sweat absorbing portion 50 is not provided with any openings such as holes or slits corresponding to the openings 40 described above. The reason for this will be explained later.

Further, in the following description, the portion of the ventral waist portion 20 and the back waist portion 30 of the diaper 1 in which the sweat absorbing portion 50 is not provided is also referred to as a “weak sweat absorbing portion 60”. In other words, the sweat absorbing portion 50 is a portion that absorbs sweat of the wearer more easily than the weak sweat absorbing portion 60.

===About the sweat absorption performance of diaper 1===
Next, the sweat absorption performance of the diaper 1 will be explained. FIG. 4A is a schematic cross-sectional view of the pant-shaped diaper 1 stretched in the left-right direction when viewed from the upper side in the vertical direction (the side of the waist opening BH). FIG. 4B is a schematic cross-sectional view of the pant-shaped diaper 1 in a natural state after being released from the stretched state in FIG. 4A, as viewed from the upper side in the vertical direction (the side of the waist opening BH). In FIG. 4A, for convenience of explanation, the waist opening BH is shown as a substantially elliptical shape in a state where the waist portions 20 and 30 are extended in the left-right direction. Moreover, the absorbent main body 10 is not shown in both FIGS. 4A and 4B.

As shown in FIG. 4A, when the diaper 1 is stretched in the left-right direction, there are no large wrinkles formed on the surface of the ventral waist portion 20 and the dorsal waist portion 30, and there are no irregularities in the thickness direction. I don't have it. Therefore, the sweat absorbing portion 50 provided on the skin side of the back waist portion 30 also maintains a flat (curved) surface as shown in FIG. 4A.

When the stretched state is released from this state, based on the contractile force of the thread-like elastic members 23, 33 and the elastic sheet 24 provided in the ventral waist region 20 and the dorsal waist region 30, the ventral waist region 20 and the dorsal region The waist portion 30 contracts in the left-right direction. At this time, as shown in FIG. 4B, the manner of contraction differs between the ventral waist portion 20 and the dorsal waist portion 30.

Since the ventral waist portion 20 of the diaper 1 is provided with a plurality of openings 40, 40..., the rigidity of the skin-side sheet 21 and the non-skin-side sheet 22 is reduced compared to a case where no openings are provided. It is lower and easier to deform. Therefore, the skin-side sheet 21 and the non-skin-side sheet 22 contract significantly in the left-right direction, and the surface of the ventral waist portion 20 is deformed to have irregularities in the thickness direction, as shown in FIG. 4B. That is, a plurality of wrinkles are formed on the surface of the ventral waist portion 20.

On the other hand, the back waist portion 30 is provided with a sweat absorbing portion 50, and in the diaper 1, this sweat absorbing portion 50 is provided with an opening (through hole) corresponding to the opening 40 of the ventral waist portion 20. Not yet. Therefore, the region of the back waist portion 30 where the sweat absorbing portion 50 is provided has higher rigidity than other regions (weak sweat absorbing portion 60), making it difficult for the skin side sheet 31 and the non-skin side sheet 32 to deform. It has become. Therefore, the region of the back waist portion 30 that overlaps with the sweat absorbing portion 50 can easily maintain a flat state.

The ventral waist portion 20 and the dorsal waist portion 30 are joined to each other by a pair of side locks 5, 5 at both end portions in the left and right direction. That is, the ventral waist portion 20, which is easy to contract, and the dorsal waist portion 30 (sweat absorption portion 50), which is difficult to contract, are connected in the circumferential direction of the waist opening BH. Therefore, when the ventral waist portion 20 corresponding to the weak sweat absorbing portion 60 contracts in the left-right direction, the sweat absorbing portion 50 of the dorsal waist portion 30 is relatively easily pulled to both sides in the left-right direction, and the ventral waist portion 20 Compared to the (weak sweat absorption part 60), unevenness in the thickness direction is less likely to be formed. That is, wrinkles are less likely to be formed in the sweat absorbing portion 50, and the planar shape is easily maintained.

Therefore, when the diaper 1 is worn, the sweat absorption section 50 can easily fit tightly against the skin of the wearer, and the sweat of the wearer can be efficiently absorbed over the entire surface of the sweat absorption section 50. I can do it. Thereby, the sweat absorption performance of the diaper 1 can be improved.

In the diaper 1 of the present embodiment, the sweat absorption section 50 is provided only on one side of the ventral waist section 20 and the back waist section 30. In other words, the sweat absorption section 50 is not provided on the other side of the ventral waist section 20 and the back waist section 30. In the example of FIG. 4B, the sweat absorption section 50 is provided only on the dorsal waist section 30, and the sweat absorption section 50 is not provided on the ventral waist section 20. In this way, by providing the sweat absorbing section 50 only on one side of the ventral waistline section 20 and the dorsal waistline section 30, the ventral waistline section 20 and the dorsal waistline section 30 are able to contract in the left-right direction. Differences in quantity tend to occur. That is, in the circumferential direction of the waist opening BH, the weak sweat absorbing section 60 on the side where the sweat absorbing section 50 is not provided (the ventral side in FIG. 4B) contracts significantly, whereas the weak sweat absorbing section 60 on the side where the sweat absorbing section 50 is provided contracts. The amount of contraction on the dorsal side (in Figure 4B) becomes smaller.

Therefore, the portion where the sweat absorbing portion 50 is provided becomes easily stretched, and becomes relatively easy to stretch in the circumferential direction of the waist opening BH. Therefore, as described above, the planar shape of the sweat absorbing portion 50 is maintained, making it easier to fit the wearer's body. Thereby, it becomes possible to improve the sweat absorbency of the diaper 1 (sweat absorbing portion 50). Note that even when the sweat absorbing section 50 is not provided on the dorsal side but only on the ventral side, the planar shape of the sweat absorbing section 50 is easily maintained, and the effect of improving sweat absorption performance on the ventral side can be obtained. is possible. However, since the wearer usually sweats more on the back side than on the ventral side, it is more effective to provide the sweat absorption section 50 on the back side as in this embodiment.

In the diaper 1, when openings are provided in the sweat absorbing section 50, the area of the openings provided per unit area of the weak sweat absorbing section 60 is larger than the area of the openings provided per unit area of the sweat absorbing section 50. Do it like this. With such a configuration, the rigidity of the weak sweat absorption section 60 is lower than the rigidity of the sweat absorption section 50, and when the diaper 1 contracts, the amount of contraction of the weak sweat absorption section 60 is greater than the amount of contraction of the sweat absorption section 50. Become. Therefore, since the weak sweat absorbing portion 60 is more likely to contract in the left-right direction, the sweat absorbing portion 50 is relatively more likely to be extended in the left-right direction, making it easier for the sweat absorbing portion 50 to maintain its planar shape. Thereby, when the diaper 1 is worn, the sweat absorbing section 50 can easily fit the wearer's skin, and the sweat absorbing performance of the sweat absorbing section 50 can be improved. The area of the opening of the sweat absorption section 50 can be measured, for example, by taking an image of the portion where the opening is formed in the stretched state of the diaper 1 (for example, the planar state of FIG. 2) and performing image analysis. can. In addition, if the size and shape of each opening (hole) are the same, the size of the area can be compared by measuring the number of openings provided per unit area of the sweat absorption section 50 and the weak sweat absorption section 60. is also possible.

In this embodiment, as shown in FIG. 2, no opening is provided in the region of the waist portions 20, 30 that overlap with the sweat absorbing portion 50. Therefore, the rigidity of the sweat absorbing section 50 tends to be higher than that of the weak sweat absorbing section 60 provided with the opening 40, and when the weak sweat absorbing section 60 contracts, the sweat absorbing section 50 is relatively stretched and the sweat absorbing section 50 has a configuration that makes it easier to maintain a planar shape. Thereby, the sweat absorption performance of the sweat absorption section 50 can be further improved.

Furthermore, in the diaper 1 of the present embodiment, the sweat absorbent section 50 is formed by laminating and bonding a breathable sweat absorbent sheet 51 to the skin side of the back waist portion 30. Therefore, the material rigidity in the region where the sweat absorbing section 50 is provided is higher than the material rigidity in other regions (weak sweat absorbing section 60), and wrinkles and unevenness are less likely to be formed on the surface of the sweat absorbing section 50. That is, the sweat absorbing portion 50 is stacked with the breathable sweat absorbing sheet 51, which is a separate sheet member from the sheet members (skin side sheet 31 and non-skin side sheet 32) constituting the back side girth portion 30. The rigidity becomes higher than the rigidity of the weak sweat absorption section 60. Therefore, the sweat-absorbing portion 50 can easily maintain its planar shape and fit the wearer's skin surface-wise, thereby further improving sweat-absorbing performance.

Further, the opening 40 provided in the weak sweat absorbing portion 60 of the diaper 1 is preferably a through hole that penetrates the ventral waist portion 20 (dorsal waist portion 30) in the thickness direction. For example, when the opening 40 is provided in only one of the skin-side sheet 21 and the non-skin-side sheet 22 that make up the abdominal girth section 20, the opening 40 is provided in both sheet members. Since the rigidity of the weak sweat-absorbing portion 60 of the ventral waist portion 20 is increased, the degree of contraction is also reduced. When the weak sweat absorption section 60 becomes difficult to contract, the relative extension of the sweat absorption section 50 becomes small, and there is a possibility that the sweat absorption section 50 becomes difficult to maintain its planar shape.

In this embodiment, as shown in FIG. 3, in the weak sweat-absorbing portion 60 of the ventral waist portion 20, an opening penetrates the skin-side sheet 21 and the non-skin-side sheet 22 (and the stretchable sheet 24) in the thickness direction. 40 are provided. As a result, the ventral waist portion 20 (weak sweat absorbing portion 60) is easily contracted as shown in FIG. This makes it easier to maintain a flat shape. Therefore, the sweat-absorbing portion 50 easily fits the wearer's skin, and the sweat-absorbing performance can be further improved. In addition, since the through holes (openings 40) are provided in the weak sweat absorption section 60, the breathability is further improved, so that when the diaper 1 is worn, stuffiness and skin irritation due to sweat may occur in the weak sweat absorption section 60. becomes easier to suppress.

Furthermore, in the diaper 1, the opening 40 is provided in a region above the sweat absorbing section 50 in the vertical direction. In FIG. 2, it can be seen that a plurality of openings 40, 40, . Therefore, when the diaper 1 is worn, when the waist portions 20 and 30 contract in the left-right direction, the upper end of the ventral waist portion 20 contracts the most, and as shown in FIG. 4B, there are irregularities in the thickness direction. Deformation occurs and wrinkles are more likely to form. That is, in the ventral region of the waist opening BH, a plurality of wrinkles are formed along the up-down direction and lined up in the left-right direction.

When such wrinkles are formed in the waist opening BH, when the diaper 1 is worn, a gap is formed between the skin of the wearer's ventral waist region and the ventral waist region 20, and the skin does not pass through the gap. This makes it easier for heat and moisture to move. That is, heat and moisture are easily discharged to the outside of the diaper 1 from the waist opening BH along the wrinkles extending in the vertical direction. This makes it easier to suppress stuffiness and skin irritation caused by perspiration even in areas where the sweat absorbing portion 50 is not provided.

Further, in the diaper 1, as shown in FIGS. 1 and 2, the opening 40 is not provided in the region of the waist portions 20, 30 that overlap with the absorbent main body 10. In other words, the opening 40 is provided in a region that does not overlap with the absorbent main body 10. If the opening 40 were provided in an area that overlaps with the absorbent body 10, there would be an impression that excrement such as urine absorbed in the absorbent body 10 would pass through the opening 40 and leak to the outside. may be given to the user. On the other hand, in the diaper 1, the absorbent main body 10 and the opening 40 do not overlap, so that unnecessary worries are not likely to be caused to the user. Furthermore, since the absorbent main body 10 is not pinched between the openings 40 and the wearer's skin, moisture such as sweat can easily evaporate to the outside of the diaper 1 through the openings 40, preventing stuffiness and rashes. Easier to suppress.

Further, the ventral waist portion 20 is provided with a planar elastic sheet 24 that can be expanded and contracted at least in the left-right direction. In the region of the ventral waist portion 20 where the stretchable sheet 24 is provided, stretching force (contraction force) is developed over the entire region of the stretchable sheet 24 in the vertical direction. The waist portion 20 is prevented from sagging in the vertical direction.

Suppose that in the ventral waist portion 20 of FIG. 2, instead of the elastic sheet 24, a plurality of linear elastic members such as thread rubber (an elastic member corresponding to the thread-like elastic member 23) are arranged in a line so as to be spaced apart in the vertical direction. Suppose that it had been done. In such a configuration, when the linear elastic member contracts, the distance between two vertically adjacent linear elastic members may become smaller. Then, as the distance between the linear elastic members in the vertical direction decreases, the ventral waist portion 20 itself may contract in the vertical direction, causing a so-called bulge. In such a case, there is a risk that the good fit of the ventral waist portion 20 may be impaired, or the opening 40 may be blocked, making it easy to get stuffy or get a rash.

In contrast, in the present embodiment, by providing the planar stretchable sheet 24, the ventral waist portion 20 is prevented from sagging in the vertical direction in this region, and a good fit is achieved. can be realized. Furthermore, since the opening 40 is less likely to be blocked, stuffiness and rashes can be suppressed when the diaper 1 is worn.

In addition, in this embodiment, the sweat absorption section 50 is provided on one side (dorsal side waistline part 30) of the front and rear waistline parts 20, 30, and the elastic sheet 24 is provided on the other side (ventral side waistline part 20). It is being Furthermore, a plurality of openings 40 are provided that penetrate the stretchable sheet 24 in the thickness direction. By providing the openings 40 in the stretchable sheet 24, the rigidity and stress of the stretchable sheet 24 are reduced, so that the ventral waist portion 20 is more likely to contract and wrinkles are more likely to be formed. Thereby, sweat and heat can be efficiently evaporated to the outside of the diaper 1 through the openings 40 and gaps between the wrinkles. Since the stretchable sheet 24 makes it easier for the ventral waist section 20 to contract, the sweat absorption section 50 provided on the back waist section 30 becomes relatively easier to stretch, making it easier to maintain its planar shape. Therefore, the sweat absorbing properties of the sweat absorbing section 50 can be improved.

<Modified example>
In the above-described embodiment, an example in which the opening 40 is provided in the weak sweat absorption section 60 on the side of the ventral waist section 20 has been described. good. FIG. 5 is a plan view of a modified example of the diaper 1 in the unfolded and stretched state.

In the modification shown in FIG. 5, a plurality of openings 41 are provided in the back waist portion 30 on the outside of the sweat absorbing portion 50 in the left-right direction and in an area overlapping with the sweat absorbing portion 50 in the vertical direction. That is, the opening 41 is provided in a region between the sweat absorbing portion 50 and the side lock 5 in the left-right direction. The opening 41 is a through-hole having the same shape and size as the opening 40 and passing through the skin-side sheet 31 and the non-skin-side sheet 32 that constitute the back waist portion 30 in the thickness direction. However, the opening 41 may be a hole having a shape and size different from the opening 40, and instead of penetrating the skin side sheet 31 and the non-skin side sheet 32 in the thickness direction, the opening 41 may be a hole having a shape and size different from the opening 40. It may also be provided on at least one of the non-skin side sheet 32. Further, the arrangement and number of the plurality of openings 41 are not limited to those shown in FIG. 5, and can be changed as appropriate.

As shown in FIG. 5, the opening 41 is provided in the region between the sweat absorbing portion 50 and the side locking portion 5 (weak sweat absorbing portion 50) in the left-right direction. In comparison, the rigidity of this region is lower. Therefore, when the diaper 1 contracts, the area between the sweat absorbing portion 50 and the side locks 5 tends to contract.

In FIG. 4B, it has been explained that when the ventral waist portion 20 contracts, the sweat absorbing portion 50 of the dorsal waist portion 30 becomes relatively easy to extend. area tends to shrink. Therefore, the sweat absorbing section 50 is pulled more strongly by both sides in the left-right direction, so that the sweat absorbing section 50 is extended in the left-right direction and easily maintains its planar shape. Thereby, when the diaper 1 is worn, the sweat absorbing portion 50 can easily fit the surface of the wearer's skin, and the sweat absorbing performance of the diaper 1 can be improved.

===Second embodiment===
In the second embodiment, a pants-type disposable diaper 2 (hereinafter also referred to as diaper 2) in which sweat absorbing parts 50 are provided on both the back side and the ventral side will be described. FIG. 6 is a plan view of the diaper 2 in the unfolded and stretched state.

The diaper 2 of the second embodiment includes, as the sweat absorbing portions 50, a ventral sweat absorbing portion 55 provided on the ventral waist portion 20 and a back sweat absorbing portion 56 provided on the back waist portion 30. In FIG. 6, the back side sweat absorption section 56 has the same configuration as the sweat absorption section 50 in the first embodiment. Further, the ventral sweat absorbing section 55 also has basically the same configuration as the sweat absorbing section 50 in the first embodiment. That is, the ventral sweat-absorbing portion 55 is formed by laminating a separate breathable sweat-absorbing sheet 51 or applying a hydrophilic agent 52 to a predetermined region of the ventral surface of the ventral waist portion 20. . Note that the configuration of the diaper 2 other than the sweat absorbing parts 55 and 56 is substantially the same as the diaper 1 of the first embodiment, so a detailed description of each part will be omitted.

In the diaper 2, the sweat absorption section 50 (ventral sweat absorption section 55) is provided not only in the dorsal waist region 30 but also in the ventral waist region 20, so the sweat absorption performance on the ventral side is improved, and the diaper 2 as a whole is sweat absorbent. Performance can be improved. In particular, in the ventral waist portion 30, in addition to the ventral sweat absorbing portion 55, a plurality of openings 40 are provided in an area above the ventral sweat absorbing portion 55 in the vertical direction. Good air permeability is also maintained, making it more difficult for the wearer to feel uncomfortable when wearing the diaper 2.

However, in the diaper 2, the sweat absorbing section 50 is set such that the area of the back sweat absorbing section 56 is larger than the area of the ventral sweat absorbing section 55. In FIG. 6, the length W56 in the left-right direction of the dorsal sweat-absorbing part 56 and the length W55 in the left-right direction of the ventral sweat-absorbing part 55 are equal (W56=W55). On the other hand, the length L56 of the dorsal sweat absorbing section 56 in the vertical direction is longer than the length L55 of the ventral sweat absorbing section 55 in the vertical direction (L56>L55). That is, the area of the dorsal sweat absorbing section 56 is larger than the area of the ventral sweat absorbing section 55.

As described in the first embodiment, the sweat absorbing section 50 is basically not provided with an opening or the like, and thus has a higher rigidity than the weak sweat absorbing section 60 provided with the opening 40. That is, the sweat absorbing portion 50 is a region that is less likely to contract than the weak sweat absorbing portion 60 and is relatively easily stretched. As a result, the planar shape is easily maintained, and sweat absorption performance can be improved by fitting the surface to the wearer's skin.

Therefore, when the sweat-absorbing portions 50 (55, 56) are provided on both sides of the ventral side and the back side, as in the diaper 2, a difference in rigidity is unlikely to occur between the ventral side and the back side, and the sweat-absorbing portions 50 are stretched. This may make it difficult for the sweat absorbing portion 50 to maintain its planar shape. Therefore, in the diaper 2, by making the area of the dorsal sweat absorbing part 56 larger than the area of the ventral sweat absorbing part 55, the region of high rigidity on the ventral side is made larger than on the ventral side. As a result, the dorsal sweat absorbing portion 56 is less likely to contract than the ventral sweat absorbing portion 55, making it easier to maintain its planar shape. Therefore, when the diaper 2 is worn, it is possible to improve the sweat absorption performance of the back side sweat absorption part 56 in the back side region where a large amount of sweat is produced, and it is possible to realize the diaper 2 having good sweat absorption performance as a whole. can.

In the diaper 2, if the rigidity of the dorsal sweat absorbing section 56 is higher than the rigidity of the ventral sweat absorbing section 55, the area of the dorsal sweat absorbing section 56 does not necessarily need to be larger than the area of the ventral sweat absorbing section 55. There is no. For example, in the dorsal waist part 30, the dorsal sweat absorbent part 56 is formed by laminating a separate breathable sweat absorbent sheet 51 in a predetermined region, and in the ventral waist part 20, a hydrophilic agent 52 is formed in a predetermined region. It is assumed that the ventral sweat absorbing portion 55 is formed by applying . In this case, by laminating the highly rigid breathable sweat-absorbing sheets 51, even if the area of the dorsal sweat-absorbing part 56 is smaller than the area of the ventral sweat-absorbing part 55, the highly rigid dorsal sweat-absorbing part 56 is flat. The shape can be easily maintained and the sweat absorption performance on the back side can be improved.

===Other embodiments===
Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. Further, the present invention can be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

Further, in each of the above embodiments, a diaper in which the ventral waist portion 20 and the dorsal waist portion 30 are separated and is a separate member is illustrated, but the crotch portion is located between the ventral waist portion 20 and the dorsal waist portion 30. may be provided, and the ventral waist portion 20 and the dorsal waist portion 30 may be one continuous member.

1 Diaper (pants-type absorbent article),
2 Diaper (pants-type absorbent article),
5 side locking,
10 absorbent body,
11 absorbent body, 11A absorbent core, 11B core wrap sheet,
12 top sheet, 13 back sheet,
14 Exterior seat, 15 Side seat,
17 Leg elastic member, 18 Leakage prevention wall elastic member,
20 ventral girth, 20eu upper end,
21 skin side sheet, 22 non-skin side sheet, 221 end,
23 thread-like elastic member, 24 elastic sheet,
20 dorsal girth, 30eu upper end,
31 skin side sheet, 32 non-skin side sheet, 321 end,
33 filamentous elastic member,
40 opening, 41 opening,
50 Sweat absorption part,
51 Breathable sweat absorbent sheet, 52 Hydrophilic agent,
55 Ventral sweat absorption part, 56 Dorsal sweat absorption part,
60 weak sweat absorption part,
70 Leakage prevention wall part

Claims (8)

It has a vertical direction and a horizontal direction that intersect with each other,
an absorbent body,
a waist portion comprising: an elastic member that expands and contracts in the left-right direction; a skin-side sheet disposed on the skin side of the elastic member; and a non-skin side sheet disposed on the non-skin side of the elastic member;
A pants-type disposable diaper comprising:
The waist portion has a weak sweat absorbing portion and a sweat absorbing portion that absorbs sweat of the wearer more easily than the weak sweat absorbing portion,
In the weak sweat absorption part, an opening is provided in at least one of the skin side sheet and the non-skin side sheet,
The area of the opening provided per unit area of the weak sweat absorption part is larger than the area of the opening provided per unit area of the sweat absorption part,
The waist part has a ventral waist part and a dorsal waist part,
The ventral waist portion and the dorsal waist portion are connected to each other by a pair of side locks provided at both ends in the left and right direction,
The pants-type disposable diaper is characterized in that the weak sweat-absorbing portion is provided between the sweat-absorbing portion and the side lock in the left-right direction . It has a vertical direction and a horizontal direction that intersect with each other,
an absorbent body,
a waist portion comprising: an elastic member that expands and contracts in the left-right direction; a skin-side sheet disposed on the skin side of the elastic member; and a non-skin side sheet disposed on the non-skin side of the elastic member;
A pants-type disposable diaper comprising:
The waist portion has a weak sweat absorbing portion and a sweat absorbing portion that absorbs sweat of the wearer more easily than the weak sweat absorbing portion,
In the weak sweat absorption part, an opening is provided in at least one of the skin side sheet and the non-skin side sheet,
The area of the opening provided per unit area of the weak sweat absorption part is larger than the area of the opening provided per unit area of the sweat absorption part,
The waist part has a ventral waist part and a dorsal waist part,
The sweat absorbing portion is provided on one of the ventral waist portion and the dorsal waist portion, and the weak sweat absorbing portion is provided on the other of the ventral waist portion and the dorsal waist portion. A pants-type disposable diaper. The pants-type disposable diaper according to claim 1 or 2 ,
A pants-type disposable diaper characterized in that the sweat absorbing portion is not provided with the opening. The pants-type disposable diaper according to any one of claims 1 to 3 ,
The pants-type disposable diaper is characterized in that the sweat-absorbing portion is provided with a breathable sweat-absorbing sheet separate from the skin-side sheet and the non-skin-side sheet. The pants-type disposable diaper according to any one of claims 1 to 4 ,
The pants-type disposable diaper is characterized in that the opening is a through hole that penetrates the skin side sheet and the non-skin side sheet in the thickness direction. The pants-type disposable diaper according to any one of claims 1 to 5 ,
The pants-type disposable diaper is characterized in that the opening is provided in an area above the sweat absorbing section in the vertical direction. The pants-type disposable diaper according to any one of claims 1 to 6 ,
The pants-type disposable diaper is characterized in that the waist portion has a planar stretchable sheet that stretches at least in the left-right direction. It has a vertical direction and a horizontal direction that intersect with each other,
an absorbent body,
a waist portion comprising: an elastic member that expands and contracts in the left-right direction; a skin-side sheet disposed on the skin side of the elastic member; and a non-skin side sheet disposed on the non-skin side of the elastic member;
A pants-type disposable diaper comprising:
The waist portion has a weak sweat absorbing portion and a sweat absorbing portion that absorbs sweat of the wearer more easily than the weak sweat absorbing portion,
In the weak sweat absorption part, an opening is provided in at least one of the skin side sheet and the non-skin side sheet,
The waist portion has a planar stretchable sheet that stretches at least in the left-right direction,
The waist part has a ventral waist part and a dorsal waist part,
The sweat absorbing portion is provided on one side of the ventral waist portion and the dorsal waist portion, and the weak sweat absorbing portion is provided on the other side, and the elastic sheet is disposed on the other side.
A pants-type disposable diaper, characterized in that the elastic sheet is provided with an opening.

Images