TWM574902U - Absorbent article - Google Patents

Abstract

In order to allow the wearer or the like of the absorbent article to easily visually confirm the through hole of the absorbent article. The absorbent article (1) is provided with a front trunk portion (20) and a rear trunk portion (30), and at least one of the front trunk portion (20) and the rear trunk portion (30) is provided with a penetration. The hole portion (50) in the front-back direction is characterized in that, among the front side crotch portion (20) and the rear side crotch portion (30), the front side crotch portion (20) and the rear side are in the front-rear direction. The non-overlapping area (30NL) in which the perimeter part (30) does not overlap is provided with at least one said hole part (50).

Description

Absorbent article

The present invention relates to an absorbent article.

Conventionally, disposable absorbent articles such as disposable diapers have been known as absorbent articles that absorb feces such as urine. For example, Document 1 describes that by forming a plurality of slits 8 extending through the thickness direction, the open type disposable diaper 1 and the pants type disposable diaper 30 are prevented. Sultry.

[Patent Document 1] Japanese Patent Laid-Open No. 2002-65731

[New type of problem to be solved]

However, in the natural state, the disposable diapers 1, 30 shown in Document 1 are caused by the shrinkage of the elastic members 7 around the perimeter. A person who wears it may worry that the slit 8 cannot be visually recognized, and there is a case where it is impossible to recognize from the appearance that it has good air permeability.

The new model was developed in view of the above-mentioned conventional problems, and its purpose is to make it easy for the wearer of the absorbent article or the person to be worn to visually recognize the through holes of the absorbent article, and to easily recognize that it has good ventilation. Sex. [Technical means to solve the problem]

The main new type of absorbent article used to achieve the above-mentioned purpose is to have an upside-down direction, a left-right direction, and a front-back direction that intersect each other, and have a front side stern portion and a rear side stern portion, the front side stern portion and the rear stern portion. At least one of the perimeter portions is provided with a hole portion penetrating the front-rear direction, wherein the front side perimeter portion and the rear side perimeter portion include the front side perimeter portion and the rear side perimeter portion in the front-back direction. The non-overlapping region where the portions do not overlap includes at least one of the aforementioned hole portions.其他 Other features of the present invention will be apparent from the description of the specification and the drawings. [New effect]

According to the present invention, the through-holes of the absorbent article can be easily visually confirmed, and the good air permeability can be easily felt.

At least the following matters can be understood from the description of the specification and the attached drawings. An absorbent article has an up-down direction, a left-right direction, and a back-and-forth direction that intersect each other, and has a front crotch portion and a rear crotch portion. At least one of the front crotch portion and the rear crotch portion is provided with a penetration. The hole portion in the front-back direction is characterized in that a non-overlapping area in which the front side crotch portion and the rear side crotch portion do not overlap in the front-back direction is provided in the front side crotch portion and the rear side crotch portion. At least one of the aforementioned holes.

According to such an absorbent article, in a natural state, it is easy to visually confirm the hole portion from the front side or the rear side. In addition, since the hole portion is provided in a non-overlapping area, the user can see the other side from one side of the front-rear direction through the hole portion, and it is easy to recognize that it is a through hole. Therefore, it becomes easy for the user to visually confirm the through-holes of the absorbent article, and it is easy to recognize the good air permeability.

In this absorbent article, it is preferable that the rear side crotch portion has a rear non-overlapping region which does not overlap the front side crotch portion in the front-rear direction, and includes at least one hole portion in the rear non-overlapping region. .

According to such an absorbent article, it is easy to visually confirm the hole portion in the rear trunk portion from the front side or the rear side, and it is easy to recognize that the hole portion is a through hole. Therefore, it becomes easy for the user to visually confirm the through-holes of the absorbent article, and it is easy to recognize the good air permeability.

In the absorbent article, it is preferable that the front side crotch portion and the rear side crotch portion are joined to each other at both ends in the left-right direction, and the rear non-overlapping region is provided at the both end portions after the joining. The lowermost part protrudes to the lower side.

According to such an absorbent article, the non-overlapping region on the rear side functions as a hip cover covering the hips of the wearer when the absorbent article is worn, and the user can easily recognize the hole provided in the hip cover. unit. Thereby, the user can recognize that the buttocks which sweat easily have good breathability.

In the absorbent article, it is preferable that the rear side trunk portion includes an elastic member that expands and contracts in the left-right direction, and the rear side trunk portion includes a rear overlap region overlapping the front side trunk portion in the front-back direction, The interval between the first lower elastic member located at the lowermost side in the rear non-overlapping area and the elastic member adjacent to the upper side of the first lower elastic member is lower than the rear portion in the overlapping area. The distance between the second lower end elastic member on the side and the elastic member adjacent to the upper side of the second lower end elastic member is larger.

According to such an absorbent article, the shrinkage force of the rear non-overlapping area can be made smaller than that of the rear overlap area, and the suspicion that the holes in the rear non-overlapping area are covered by wrinkles can be alleviated. When the article is viewed from the front side, it becomes easy to visually confirm the hole portion of the rear crotch portion.

In this absorbent article, the tension of the first lower end elastic member is preferably smaller than the tension of the second lower end elastic member.

According to such an absorbent article, the shrinkage force of the non-overlapping region in the rear side can be made smaller, and the suspicion that the holes in the non-overlapping region in the rear side are covered with wrinkles can be alleviated, even when the absorbent article is viewed from the front side. It also becomes easy to visually confirm the hole portion of the rear crotch.

In this absorbent article, it is preferable that the rear side non-overlapping region includes at least one hole portion on a lower side in the vertical direction than the first lower end elastic member.

According to such an absorbent article, in a region lower than the first lower end elastic member, the tension caused by the elastic member (the first lower end elastic member) does not easily work, so it is difficult to form a wrinkle. Therefore, the hole portion arranged in this area is not easily affected by wrinkles and shrinkage, and it becomes easier to visually confirm.

The absorbent article is preferably an absorbent body having a liquid-absorptive property, the front upper end portion of the absorbent body is joined to the front crotch portion, and the rear upper end portion of the absorbent body is joined to the rear crotch portion. , At the two ends of the absorbent body in the left-right direction, foot-elastic elastic members that extend and contract in the vertical direction are provided, and in the non-overlapping area on the rear side, the elasticity caused by the foot-elastic elastic members in the vertical direction A region in which the appearance range does not overlap includes at least one of the aforementioned hole portions.

According to such an absorbent article, the area where the stretchability caused by the elasticity of the foot circumference does not overlap in the up-down direction, and the contraction force caused by the elasticity of the foot circumference is not easily affected, and therefore it is arranged in the area. It is difficult for the hole portion to shrink in the vertical direction, and it is easy to suppress deterioration in visual confirmation. Therefore, it is easy for the user to recognize that the non-overlapping region on the rear side has good air permeability.

The absorbent article is preferably an absorbent body having a liquid-absorptive property, the front upper end portion of the absorbent body is joined to the front crotch portion, and the rear upper end portion of the absorbent body is joined to the rear crotch portion. , At the two ends of the absorbent body in the left-right direction, foot-elastic elastic members that extend and contract in the vertical direction are provided, and in the non-overlapping area on the rear side, the elasticity caused by the foot-elastic elastic members in the vertical direction. The area in which the appearance range overlaps is counted from the end of one side of the absorptive body in the left-right direction, the end of one side of the absorptive body in the left-right direction, and the side of the rear crotch portion. A position having a distance of 1/2 or more between the ends is provided with at least one of the aforementioned hole portions.

According to such an absorbent article, by arranging the hole portion at a position more than a predetermined distance from the foot circumference elastic member, it is difficult for the shrinkage force caused by the foot circumference elastic member to reach the position of the hole portion, so that the direction of the hole portion is directed. The contraction in the vertical direction is difficult, and it is easy to suppress deterioration in visual confirmation. Thereby, it becomes easy for the user to recognize that the non-overlapping region on the rear side has good air permeability.

In this absorbent article, it is preferable that the rear side crotch portion includes a rear side overlapping region overlapping the front side crotch portion in the front-back direction and a non-overlapping side that does not overlap the front side crotch portion in the front-back direction. The number of the hole portions per unit area in the rear non-overlapping area is smaller than the number of the hole portions per unit area in the rear overlapping area.

According to such an absorbent article, in the rear non-overlapping region, the strength of the rear non-overlapping region tends to be lower than that in the rear overlapping region. By reducing the opening density, it is possible to suppress an excessive decrease in the strength of the rear non-overlapping region. In this way, the non-overlapping area on the rear side is not easily broken, and each hole portion is made conspicuous, so that the user can easily recognize that it has good air permeability.

=== About disposable paper diapers according to this embodiment === << About structure of disposable paper diapers 1 >>> FIG. 1A is a natural example of an absorbent article according to this embodiment. A schematic front view of the state of the paper diaper 1 viewed from the front side. FIG. 1B is a schematic rear view of the natural diaper 1 viewed from the rear side. FIG. 2 is a plan view of the paper diaper 1 in an expanded state when viewed from the skin side. FIG. 3 is a sectional view taken along the line III-III in FIG. 2. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2.

In the following description, the diaper 1 in the state (natural state) of FIG. 1 has an "up and down direction", and the side of the hem opening portion BH in the up and down direction of the diaper 1 is called "upper side", and the lower side of the diaper 1 It is "lower side". In addition, the diaper 1 has a "left-right direction" which intersects the up-down direction, and a "front-rear direction" which intersects the up-down direction and the left-right direction. "Back side". The front-back direction is also referred to as the "thickness direction", the side that comes into contact with the wearer is also referred to as the "skin side", and the opposite side is also referred to as the "non-skin side". In addition, the longitudinal direction of the paper diaper 1 in the state of FIG. 2 (unfolded state and extended state) is also referred to as a “length direction”, one side of the longitudinal direction is also referred to as a “ventral side”, and the other side is also referred to as a “back” "Side", the end portion on one side and the other end portion in the longitudinal direction are also referred to as "upper side", and the substantially central portion C10 side in the longitudinal direction is also referred to as "lower side". C-C in Fig. 2 and the like indicate the center in the left-right direction.

The "natural state" of the diaper 1 is defined as follows. First, after taking out the paper diaper 1 packaged in the form of a product from the packaging bag, the front crotch portion 20 and the rear crotch portion 30 are stretched to both outer sides in the left-right direction to make the front crotch portion 20 and the rear crotch. The surroundings 30 each extend to a length that is consistent with or close to the size of each member alone. After the stretched state is continued for 15 seconds, the stretched state of the diaper 1 is released and placed on a flat surface such as a table. The state of being placed on a flat surface after 5 minutes has elapsed becomes the natural state of the paper diaper 1. The “expanded state” is a state where the side end portion 20a of the front side crotch portion 20 and the side end portion 30a of the rear side crotch portion 30 are separated from each other and developed, and the entire diaper 1 is unfolded flat. The "stretched state" refers to a state in which the diaper 1 (the front crotch portion 20 and the rear crotch portion 30) is stretched so that no wrinkles are visible, and specifically, it is stretched so that the member constituting the diaper 1 ( A state in which the size of the front trunk portion 20 and the rear trunk portion 30) is the same as or close to the size of the member alone.

The disposable diaper 1 (hereinafter referred to as "paper diaper 1") of this embodiment is a so-called three-piece pants-type diaper mainly used for infants and young children. Between the absorptive body 10, joined to the upper side of the front of the absorptive body 10 and covering the wearer's ventral anterior crotch 20, and joined to the upper side of the back of the absorptive body 10 and covering the back of the wearer侧 胴 围 部 30。 Side 30 around the section. Each of the front siege portion 20 and the rear siege portion 30 is also referred to as a "siege portion".

As shown in FIG. 2, the expanded diaper 1 is a state in which the front side crotch portion 20 and the rear side crotch portion 30 are arranged in parallel in the longitudinal direction with an interval therebetween, and the absorbent body 10 is straddled over the crotch. The surrounding portions 20 and 30 are fixed to each other with the end portions in the longitudinal direction of the absorbent body 10 and the respective surrounding portions 20 and 30 by using an adhesive or the like to form a substantially H shape in plan view. Next, from the substantially H-shaped unfolded state, the substantially central portion C10 in the longitudinal direction is used as a folding position, and the absorbent body 10 is folded in half. In the folded state, the front crotch portion 20 and the rear crotch portion are relatively opposed. Both ends in the left-right direction of 30, that is, the side end portion (also referred to as "end portion") 20a of the front side crotch portion 20 and the side end portion 30a (also referred to as "end portion") of the rear side crotch portion 30 ) Welding is performed by welding, so that the front crotch portion 20 and the rear crotch portion 30 are connected in a ring shape to form a crotch opening portion BH and a pair of leg openings as shown in FIGS. 1A and 1B. A pants-type paper diaper 1 with a portion LH and LH.

As shown in FIG. 2, FIG. 3, and FIG. 4, the absorbent body 10 has a substantially rectangular shape in a plan view, and is arranged such that the longitudinal direction of the absorbent body 10 is along the vertical direction. The absorbent body 10 includes an absorbent body 11, a top sheet 13 covering the absorbent body 11 from the skin side, an exterior sheet 14 covering the absorbent body 11 from the non-skin side, and a bottom sheet 15.

The absorbent body 11 is a liquid-permeable core-coated sheet 11r having a liquid-absorbent absorbent core 11c capable of absorbing feces such as urine, and a tissue paper covering the outer peripheral surface of the absorbent core 11c. . The absorbent core 11c is an example of a predetermined liquid-absorbent material formed into a predetermined shape, that is, a molded body having a substantially hourglass shape in plan view. Examples of the liquid-absorbent material include liquid-absorbent fibers such as pulp fibers, and liquid-absorbent granules such as a superabsorbent polymer (so-called SAP).

The top sheet 13 is a liquid-permeable sheet such as a non-woven fabric having a planar size protruding from the absorbent body 11 in the up-down direction and the left-right direction. In addition, the bottom sheet 15 is a sheet of a planar size protruding from the absorbent body 11 in the up-down direction and the left-right direction, and is a liquid-tight leak-proof sheet. A non-woven exterior sheet 14 is provided on the non-skin side of the bottom sheet 15.

On both sides of the absorptive body 10 in the left-right direction, that is, at the portions where the leg openings LH are formed, leg folds LG (foot-stretched stretchable portions) that extend and contract in the longitudinal direction of the absorptive body 10 are provided. Between the bottom sheet 15 and the exterior sheet 14 in the thickness direction, a leg elastic member 45 such as a rubber string in a state extended in the longitudinal direction of the absorbent body 10 is sandwiched and fixed, thereby forming a leg fold Edge LG (see Fig. 4 etc.). Using the foot circumference elastic member 45, stretchability along the longitudinal direction (up and down direction) of the absorbent body 10 is imparted to the leg hem LG, so that the foot circumference opening portion LH when the diaper 1 is worn fits tightly (fit ) Sexual improvement.

Further, in the left-right direction of the absorbent body 10, a pair of leg side hem LSG (three-dimensional hem) is provided inside the leg hem LG. The leg-side frill LSG is located on the skin side of the absorbent body 10, and functions as a leak-proof wall that prevents liquid from leaking from the gap in the opening of the foot circumference. The leg-side frill LSG is formed by erecting the exterior sheet 14 toward the skin side from the left and right ends of the absorbent body 10. A leak-proof wall elastic member 46 such as a rubber thread in a state of being stretched along the longitudinal direction of the absorbent body 10 is provided at the inner end portion in the left-right direction of the leg-side frill LSG. Due to the elasticity, the leg-side frill LSG stands up to the skin side.

As shown in FIG. 3, the front side crotch portion 20 is formed by overlapping and joining the skin-side sheet 21 and the non-skin side sheet 22 in order from the skin side in the thickness direction, and the rear side crotch portion 30 is from the thickness direction. The skin-side sheet 31 and the non-skin-side sheet 32 are sequentially overlapped and joined. The skin-side sheet 21, the non-skin-side sheet 22, the skin-side sheet 31, and the non-skin-side sheet 32 are made of non-woven fabrics such as spunbond or SMS (spunbond / meltblown / spunbond), and are generally rectangular in plan view. member. In this embodiment, the skin-side sheets 21 and 31 are made of SMS nonwoven fabric, and the non-skin-side sheets 22 and 32 are made of spunbond nonwoven fabric. The spunbond nonwoven fabric may be composed of individual fibers of thermoplastic resin such as polypropylene (PP) and polyethylene (PE), or composite fibers such as sheath core structure of PP and PE.

The skin-side sheet 21 and the non-skin-side sheet 22, and the skin-side sheet 31 and the non-skin-side sheet 32 are respectively joined with an adhesive such as a hot-melt adhesive to form the front crotch portion 20 and the rear crotch portion 30.

As shown in FIG. 3, in order to improve the skin feel and durability, the upper end of the front side crotch portion 20 starts from the upper end of the front side crotch portion 20, that is, the front upper end 20t, and the non-skin-side sheet 22 The skin is folded back downward to form a folded-back portion 22f. Similarly, the upper part of the rear side crotch part 30 is also the upper end of the rear side crotch part 30, that is, the rear upper end 30t is a starting point, and the non-skin-side sheet 32 is folded back to the lower side of the skin side to form a folded-back part 32f.

In addition, the front trunk portion 20 includes a sheet member 24 arranged to cover the lower end portion of the folded-back portion 22f to the upper end portion on the ventral side of the absorbent body 10 from the skin side. Similarly, the rear crotch portion 30 includes a sheet member 34 arranged to cover the lower end portion of the folded-back portion 32f to the upper end portion on the back side of the absorbent body 10 from the skin side. The sheet members 24 and 34 are rectangular sheet members made of a nonwoven fabric or the like. The sheet members 24 and 34 can prevent the end portions of the absorbent body 10 in the up-down direction from directly contacting the skin of the wearer, and make the skin around the skin feel good when worn. In addition, the sheet members 24 and 34 can increase the strength of the upper side end portions in the up-down direction of the front side trunk portion 20 and the rear side trunk portion 30.

Furthermore, a plurality of hole portions 50 extending from the skin side to the non-skin side are provided in the front side crotch portion 20 and the rear side crotch portion 30 at predetermined intervals in the up-down direction and the left-right direction (see FIG. 1 and FIG. 2). A detailed description of the hole portion 50 will be described later.

Between the skin-side sheet 21 and the non-skin-side sheet 22 of the front crotch portion 20, a plurality of elastic members 25, 25, etc. are arranged along the left and right rubber lines. The elastic member 25 is fixed to the skin-side sheet 21 and the non-skin-side sheet 22 in a state of being stretched in the left-right direction by bonding with an adhesive or the like. The plurality of elastic members 25, 25,... Are arranged side by side with an interval in the vertical direction.

Similarly, a plurality of elastic members 35, 35, etc. are arranged between the skin-side sheet 31 and the non-skin-side sheet 32 of the rear crotch portion 30 along the left-right direction. The elastic member 35 is extended in the left-right direction, and is fixed to the skin-side sheet 31 and the non-skin-side sheet 32 by bonding with an adhesive or the like. The plurality of elastic members 35, 35,... Are arranged side by side with an interval in the vertical direction.

The elastic members 25 and 35 impart elasticity in the left-right direction to the front trunk portion 20 and the rear trunk portion 30, thereby forming a plurality of wrinkles in the front trunk portion 20 and the rear trunk portion 30 in a natural state. fold. Most of the creases formed in the front trunk portion 20 and the rear trunk portion 30 are formed by shrinking each of the sheets 21, 22, 31, and 32 in the left-right direction and forming the shape in the up-down direction.

Among the elastic members 25 and 35, a region overlapping the absorbent body 11 near the central portion in the left-right direction is discontinuous, and in this region, the elasticity caused by the elastic members 25 and 35 cannot be exhibited. Thereby, the contraction in the left-right direction acting on the absorbent body 11 is suppressed, the absorbent body 11 can be easily maintained substantially flat, and leakage of excrement can be suppressed.

<<< About Hole Portion 50 >> Hereinafter, the hole portion 50 will be described. A plurality of hole portions 50 provided in the front crotch portion 20 and the rear crotch portion 30 pass through the skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32, respectively. Improved air permeability on the skin side. The hole portions 50 of the front trunk portion 20 and the rear trunk portion 30 each have a substantially circular shape and have substantially the same size. As shown in FIG. 2, a plurality of hole portions 50 are arranged in a staggered manner in a region 11 f on the front side perimeter portion 20 that is more outward than the absorbent body 10 in the left-right direction and overlaps the absorbent body 11 in the up-down direction. . In this case, it is preferable that the elastic member 25 is not cut by each hole portion 50, that is, the elastic member 25 is not discontinuous due to the hole portion 50. As shown in FIG. 2, the hole portion 50 of this embodiment is an area between the elastic members 25 and 25 adjacent to each other in the up-down direction, and is arranged so as not to overlap with the elastic member 25. Therefore, the elastic member 25 does not cause holes. The portion 50 becomes discontinuous.

Similarly, a plurality of hole portions 50 are arranged in a staggered manner in the rear crotch portion 30 in an area 11 b which is further outside than the absorbent body 10 in the left-right direction and overlaps the absorbent body 11 in the up-down direction. Moreover, as shown in FIG. 2, each hole portion 50 is a region between the elastic members 35 and 35 adjacent to each other in the up-down direction, and is arranged so as not to overlap with the elastic member 35. Therefore, the elastic member 35 is not caused by the hole portion 50. And become discontinuous.

The area provided with the hole portion 50 is not limited to this. For example, in the front crotch portion 20 and the rear crotch portion 30, the hole portion 50 is provided in an area on the upper side in the up-down direction than the areas 11f and 11b, and in an area on the upper side than the upper end portion of the absorbent body 11, etc. Yes.

The diaper 1 has an overlapping area in which the front gusset portion 20 and a rear gusset portion 30 overlap in the front-back direction, and a non-overlapping region which does not overlap in the front-back direction. Here, "overlapping in the front-rear direction" means that the front side crotch portion 20 and the rear side crotch portion 30 have overlapping portions in the front-back direction in a natural state. Similarly, "not overlapping in the front-rear direction" means that in the natural state, the front trunk portion 20 and the rear trunk portion 30 do not have overlapping portions in the front-back direction. That is, when the person who wears the paper diaper 1 (or the purchaser) takes the paper diaper 1 out of the packaging bag and actually uses it, the area where the front side crotch portion 20 and the rear side crotch portion 30 seem to overlap is overlapping Areas that do not appear to overlap are non-overlapping areas.

In this embodiment, as shown in FIG. 1A and FIG. 1B, a region where the side end portion 20a and the side end portion 30a are formed in the up-down direction, and the front side crotch portion 20 and the rear side crotch portion 30 are in the front-rear direction. repeat. On the other hand, in a region lower than the side end portion 20a and the side end portion 30a, the two do not overlap. In other words, the rear side crotch portion 30 has a side overlap region 30L that overlaps with the front side crotch portion 20 in a region overlapping with the side end portion (end portion) 30a in the front-rear direction, and the side end portion (end portion) 30a A region protruding further downward from the lowermost end has a rear non-overlapping region 30NL which does not overlap with the front side crotch portion 20. The paper diaper 1 includes at least one hole portion 50 in the rear non-overlapping region 30NL. In the natural diaper 1, the rear non-overlapping region 30NL is a portion that can be visually recognized regardless of the front side or the rear side (see FIGS. 1A and 1B). Therefore, the hole portion 50 disposed in this portion can be easily visually recognized from a front side or a rear side in a natural state, and can be easily recognized as a through hole.

In the case where the hole portion 50 is provided only in the overlapping area where the front side crotch portion 20 and the rear side crotch portion 30 overlap in the front-rear direction, the hole portion 50 can be visually confirmed only from one of the front side and the rear side. In this case as well, since the crotch portions 20 and 30 are provided in the front-rear direction of the hole portion 50, it is difficult to recognize that the hole portion 50 is a through hole. For example, when the user of the paper diaper 1 (the person to be worn by the paper diaper 1 or the wearer of the paper diaper 1) views the hole portion 50 provided in the overlapping area of the front crotch portion 20 from the front side in the front-rear direction, because The hole portion 50 may appear to be blocked by the rear side crotch surrounding portion 30 overlapping the front and rear directions, and it may be difficult to recognize that the hole portion 50 is a through hole.

In contrast, in this embodiment, since the hole portion 50 is provided in the rear non-overlapping region 30NL, the user of the paper diaper 1 can see the other side from the one side in the front-back direction through the hole portion 50. That is, the hole portion 50 can be visually recognized from the front side or the rear side, and it is easy to recognize that the hole portion 50 is a through hole. Therefore, it becomes easy to recognize that the paper diaper 1 has good air permeability. The rear non-overlapping area 30NL functions as a hip cover that covers the hips of the wearer when the diaper 1 is worn. Therefore, the user can be made aware that the buttocks region, which is prone to sweating when worn, has good breathability.

In FIGS. 1A and 1B, although the non-overlapping area of the paper diaper 1 is shown as being disposed in the rear non-overlapping area 30NL on the rear side crotch portion 30, it is provided in other parts of the front side crotch portion 20 and the rear side crotch portion 30. Non-overlapping areas are also possible. 5A and 5B show a modification of the non-overlapping area provided in the paper diaper 1. FIG. 5A is a schematic front view of a paper diaper 1 according to a modified example viewed from the front side in a natural state, and FIG. 5B is a schematic rear view of a paper diaper 1 according to a modified example viewed from the rear side in a natural state. As shown in FIGS. 5A and 5B, in the paper diaper 1 of the modified example, the upper end 30 t of the rear crotch portion 30 is positioned on the upper side in the vertical direction than the upper end 20 t of the front crotch portion 20. That is, the upper end portion of the side crotch portion 30 after the modification projects more upward than the upper end 20 t of the front side crotch portion 20, and this protruding region becomes a rear non-overlapping region that does not overlap the front side crotch portion 20 in the front-back direction. 30NLU. The rear non-overlapping region 30NLU includes a hole portion 50.

Also in the case of this modification, the hole portion 50 provided in the rear non-overlapping area 30NLU can be visually confirmed from the front side or the rear side, and it can be seen at a glance that it is a through hole. Therefore, it is easy for a user to recognize that the paper diaper 1 of the modification has good air permeability in the non-overlapping area 30NLU on the rear side. In FIGS. 5A and 5B, although the rear non-overlapping area 30NLU is provided at the upper end portion of the rear side crotch portion 30, the non-overlapping area is provided at the front side crotch portion 20 and at the non-overlapping region of the front side crotch portion 20. The hole portion 50 may be provided. In this case, too, the hole portion 50 can be visually recognized from the front side or the rear side, and it is known at a glance that the hole portion 50 is a through hole. Therefore, the user can easily recognize that the diaper 1 has good air permeability.

In addition, as shown in FIG. 2, the paper diaper 1 preferably has the elastic member 35 a (first elastic member) located at the lowermost side in the rear non-overlapping region 30NL and the upper side of the elastic member 35 a in the upper and lower directions. The interval Lx of the adjacent elastic members 35b is lower than the area (the area where the side end portions 20a and 30a are formed in the vertical direction) overlapping the front side surrounding area 20 in the rear side surrounding area 30. The interval Ly between the elastic member 35c (second elastic member) and the elastic member 35d adjacent to the upper side in the up-down direction of the elastic member 35c is larger (Lx> Ly). By disposing the elastic member 35 in this manner, the contraction force of the rear non-overlapping area 30NL can be reduced, the number of wrinkles formed in the rear non-overlapping area 30NL can be reduced, and it becomes easy to visually confirm the孔 部 50。 The hole portion 50.

Here, the "contraction force" refers to a force that maintains the contraction state of the front side crotch portion 20 or the rear side crotch portion 30 in a natural state. More specifically, when the front crotch portion 20 or the rear crotch portion 30 is split into the right half and the left half at any position in the left-right direction of the diaper 1, between the right half and the left half The force of interaction is contraction. The larger the contraction force, the more contracted the state in the natural state, and the larger the number of wrinkles generated.

FIG. 6A is a schematic view of the A-A cross section of the rear side crotch portion 30 in FIG. 2, and FIG. 6B is a schematic view of the B-B cross section of the rear side crotch portion 30 in FIG. 2. FIG. 6A shows a cross section of a region included in the interval Ly, and FIG. 6B shows a cross section of a region included in the interval Lx. In FIGS. 6A and 6B, the skin-side sheet 31 and the non-skin-side sheet 32 are respectively integrated, and the cross-sections thereof are indicated by hatching regions inclined downward and to the left.

As shown in FIG. 6A and FIG. 6B, when the elastic member 35 contracts in the left-right direction, the rear crotch portion 30 contracts in the left-right direction, thereby forming a plurality of folds undulating in the thickness direction. At this time, the contraction force of the AA section shown in FIG. 6A is larger than the contraction force of the BB section shown in FIG. 6B. Therefore, the number of wrinkles per unit area formed in the rear sacral portion 30 is as follows. More than BB section.

Therefore, in FIG. 6A where a large number of wrinkles are formed, there are holes 50 covered by the wrinkles. When the rear crotch 30 is viewed from the non-skin side, the number of holes 50 that can be visually confirmed changes. less. In addition, as the rear crotch portion 30 itself shrinks in the left-right direction, the hole portion 50 also contracts in the left-right direction, making the hole portion 50 difficult to see. On the other hand, in FIG. 6B with less wrinkles, when the rear crotch portion 30 is viewed from the non-skin side, the hole portion 50 is not easily covered by the wrinkles. In addition, in FIG. 6B, since the degree of contraction in the left-right direction is smaller than that in the case of FIG. 6A, the contraction of the hole portion 50 in the left-right direction also becomes smaller, and the hole portion 50 becomes easier to visually confirm.

In addition, it is preferable that the tension of the lowermost elastic member 35a in the rear non-overlapping area 30NL is lower than the elasticity of the lowermost side in the area overlapping the front lateral circumference 20 among the rear lateral circumference 30. The tension of the member 35c is smaller. In this way, the contraction force of the rear non-overlapping region 30NL is made smaller, the number of wrinkles formed in the rear non-overlapping region 30NL is reduced, and the hole portion 50 in the rear non-overlapping region 30NL can be alleviated from being covered by the wrinkles. It is easy to visually confirm the hole portion of the rear non-overlapping region 30NL regardless of whether the paper diaper 1 is viewed from either the front side or the rear side.

Furthermore, it is more preferable that, in the rear non-overlapping region 30NL, a hole portion 50 is provided on the lower side than the elastic member 35a located on the lowermost side. Since the elastic member 35 is in a region lower than the elastic member 35 a than the other regions, the tension of the elastic member 35 is difficult to work and it is difficult to shrink, and it is difficult to form a wrinkle in the rear crotch portion 30. Therefore, the hole portion 50 disposed in this area is less likely to be affected by wrinkles and shrinkage, and it is easier to visually confirm. In this way, it is easier for users to recognize that the diaper 1 has good air permeability.

In addition, as shown in FIG. 2, at least a part of the hole portions 50 included in the rear non-overlapping area 30NL is arranged in the up-and-down direction by the expansion and contraction caused by the leg-surrounding elastic member 45 forming the leg hem LG. The area in which the appearance of sex (the range shown by the solid line in FIG. 2 is hereinafter also referred to as the "effective length" of the foot circumference elastic member 45) does not overlap. In other words, in the rear non-overlapping area 30NL, an area that does not overlap the effective length of the foot circumference elastic member 45 in the vertical direction includes at least one hole portion 50.

The effective length range of the foot-surrounding elastic member 45 in the up-and-down direction allows a force that causes the rear non-overlapping region 30NL to contract in the up-and-down direction. For this reason, the hole part 50 arrange | positioned in this area is easy to shrink in an up-down direction, and there exists a possibility that it may become difficult to confirm visually. On the other hand, an area in which the stretchable range (effective length) of the elasticity caused by the foot circumference elastic member 45 does not overlap in the up-down direction is because the contraction force in the vertical direction caused by the foot circumference elastic member 45 is difficult to function. The hole portion 50 arranged in this area is not easily shrunk in the vertical direction, and it is easy to suppress the deterioration of the visibility. Therefore, by providing the hole portion 50 in an area that does not overlap the effective length of the foot circumference elastic member 45, the user can easily recognize that the rear non-overlapping area 30NL has good air permeability.

However, in the rear non-overlapping area 30NL, the hole 50 may be provided in a region overlapping the effective length of the foot circumference elastic member 45 in the vertical direction. FIG. 7 is a schematic plan view showing a modification of the arrangement of the hole portions 50 in the rear non-overlapping area 30NL. In FIG. 7, among the plurality of hole portions 50 provided in the rear non-overlapping area 30NL, the hole portions 50L are arranged in a region overlapping the effective length of the foot circumference elastic member 45 in the vertical direction.

When the hole portion 50 overlaps the effective length of the foot circumference elastic member 45 in the vertical direction, the hole portion 50 is preferably disposed at a predetermined distance from the foot circumference elastic member 45 in the left and right directions. In FIG. 7, if the distance in the left-right direction between the end 10es in the left-right direction of the absorbent body 10 and the end 30es in the left-right direction of the rear crotch portion 30 is set to WS30, the distance is from the left-right direction of the absorbent body 10. A hole portion 50L is provided at a position more than 1/2 of the WS30 from the end 10es. By arranging the hole portion 50L at a position more than a predetermined distance (WS30 × 1/2) from the foot circumference elastic member 45, it is difficult for the elasticity caused by the foot circumference elastic member 45 to reach the position of the hole portion 50L. The portion 50L is difficult to shrink in the vertical direction, and it is easy to suppress deterioration of visual confirmation. In this way, the user can easily recognize that the rear non-overlapping region 30NL has good air permeability.

In addition, the number of holes per unit area included in the rear non-overlapping area 30NL of the rear side crotch portion 30 of the paper diaper 1 does not overlap with the front side crotch portion 20 in the front-rear direction than in the front-rear direction. The number of the perforations 50 per unit area included in the region (the rear overlapping region 30L) on the upper side overlapping the front gusset portion 20 is smaller. That is, in the rear trunking portion 30, the opening density in the rear non-overlapping area 30NL is smaller than that in the rear overlapping area 30L.

The rear non-overlapping area 30NL (hip cover) does not overlap with other sheet members in the front-rear direction (unlaminated sheet members), and its strength is more likely to be lower than that of the rear overlapping area 30L. The user's (wearer, person who wants to be worn) fingers are caught, etc. Therefore, by making the opening density of the rear non-overlapping area 30NL smaller than that of the rear overlapping area 30L, it is possible to suppress an excessive decrease in strength and make the rear non-overlapping area 30NL less likely to break. In addition, by reducing the opening density, each hole portion 50 becomes conspicuous in the rear non-overlapping region 30NL, so that the user can easily recognize that it has good air permeability.

=== Other Embodiments === The above is a description of the embodiments of the present invention. The above embodiments are used to facilitate the understanding of the present invention, and are not intended to limit the interpretation of the present invention. In addition, the present invention can be modified and improved without departing from the scope of the present invention, and the present invention includes equivalents. For example, the following modifications are possible.

In the embodiment described above, the hole portions 50 are respectively formed in both the front side trunk portion 20 and the rear side trunk portion 30, but the present invention is not limited to this. The hole portion 50 may be formed in only one of the front trunk portion 20 or the rear trunk portion 30. However, by forming the hole portions 50 in both the front gusset portion 20 and the rear gusset portion 30, the breathability of the paper diaper 1 can be further improved.

In the above-mentioned embodiment, although the circular hole part 50 was provided in the front side trunk part 20 and the rear side trunk part 30, it is not limited to this. For example, a through-hole of any shape, such as a rectangle, an ellipse, and a star, can be provided. In addition, the front hemline portion 20 and the rear hemline portion 30 may be provided with hole portions 50 having different shapes, or hole portions 50 having different sizes may be provided.

Although the diaper 1 of the above-mentioned embodiment is intended for infants and young children, it is not limited to this, and adults may also be worn. Moreover, in the said embodiment, although the so-called three-piece disposable paper diaper 1 was illustrated as an example of an absorbent article, it is not limited to this. For example, a so-called two-piece disposable diaper and an adhesive type disposable diaper may be formed as one body with the front gusset portion 20 and the rear gusset portion 30 integrally formed.

1‧‧‧diaper (absorbent article)

10‧‧‧ Absorptive body

10es‧‧‧end (left and right)

11‧‧‧ Absorber

11c‧‧‧ Absorbent core

11r‧‧‧ core coated sheet

11f‧‧‧area

11b‧‧‧area

13‧‧‧ top slice

14‧‧‧ Exterior sheet

15‧‧‧ bottom sheet

20‧‧‧ Front side perimeter

20a‧‧‧side end (end)

20t‧‧‧front upper end

21‧‧‧ skin side sheet

22‧‧‧ Non-Skin Side Sheet

22f‧‧‧Reflex

24‧‧‧ sheet member

25‧‧‧ Elastic member

26‧‧‧ Elastic member

28‧‧‧ Elastic member

30‧‧‧ Rear side perimeter

30a‧‧‧side end (end)

30es‧‧‧end (left and right)

30t‧‧‧ rear upper end

30L‧‧‧ rear overlap area

30NL‧‧‧ rear non-overlapping area

30NLU‧‧‧Backside non-overlapping area

31‧‧‧ skin side sheet

32‧‧‧ Non-Skin Side Sheet

32f‧‧‧Reflex

34‧‧‧ sheet member

35‧‧‧ Elastic member

35a‧‧‧ Elastic member (first elastic member)

35b‧‧‧elastic member

35c‧‧‧ Elastic member (second elastic member)

35d‧‧‧elastic member

45‧‧‧Leak-proof wall elastic member

46‧‧‧Leak-proof wall elastic member

50‧‧‧ Hole

50L‧‧‧hole

BH‧‧‧ 胴 Wai opening

LH‧‧‧foot circumference opening

LG‧‧‧ Leg Frills

LSG‧‧‧ Leg Side Frills (Three-Dimensional Frills)

FIG. 1A is a schematic front view of the paper diaper 1 in a natural state as viewed from the front side. FIG. 1B is a schematic rear view of the paper diaper 1 in a natural state as viewed from the rear side. FIG. 2 is a plan view of the diaper 1 in an expanded state when viewed from the skin side. FIG. 3 is a sectional view taken along the line III-III in FIG. 2. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. 5A and 5B show a modification of the non-overlapping area provided in the diaper 1. FIG. 6A is a schematic view of the A-A cross-section of the rear crotch 30 in FIG. 2, and FIG. 6B is a schematic view of the B-B section of the rear crotch 30 in FIG. 7 is a schematic plan view showing a modification of the arrangement of the hole portions 50 in the rear non-overlapping region 30NL.

Claims (9)

An absorbent article has an up-down direction, a left-right direction, and a back-and-forth direction that intersect each other, and has a front crotch portion and a rear crotch portion. At least one of the front crotch portion and the rear crotch portion is provided with a penetration The hole portion in the front-back direction is characterized in that a non-overlapping area in which the front side crotch portion and the rear side crotch portion do not overlap in the front-back direction is provided in the front side crotch portion and the rear side crotch portion. At least one of the aforementioned holes. The absorbent article according to claim 1, wherein the rear side crotch portion is provided with a rear non-overlapping region that does not overlap the front side crotch portion in the front-back direction, and includes at least 1 in the rear non-overlap region. Aforesaid holes. The absorbent article according to claim 2, wherein the front side crotch portion and the rear side crotch portion are joined to each other at both ends in the left-right direction, and the rear non-overlapping region is provided after the joining. The lower end of the two end portions is a portion protruding further downward. The absorbent article according to claim 3, wherein the rear side crotch portion is provided with an elastic member that expands and contracts in the left-right direction, and the rear side crotch portion is provided to overlap the front side crotch portion in the front-rear direction. In the rear overlap region, the interval between the first lower elastic member located on the lowermost side in the rear non-overlapping region and the elastic member adjacent to the upper side of the first lower elastic member is longer than the overlap of the rear member. The distance between the second lower end elastic member located on the lowermost side in the region and the elastic member adjacent to the upper side of the second lower end elastic member is greater. The absorbent article according to claim 4, wherein the tension of the first lower end elastic member is smaller than the tension of the second lower end elastic member. The absorbent article according to claim 4 or 5, wherein the rear non-overlapping region includes at least one hole portion on a lower side in the vertical direction than the first lower end elastic member. The absorbent article according to any one of claims 3 to 5, which is an absorbent body having a liquid absorbency, and the upper end portion of the front side of the absorbent body is joined to the front crotch portion, and the rear of the absorbent body is The upper side end portion is connected to the rear side crotch portion, and the foot surrounding elastic members which are stretched in the vertical direction are provided at the two ends in the left and right direction of the absorbent body. A region that does not overlap the appearance range of the stretchability caused by the foot-surrounding elastic member includes at least one of the hole portions. The absorbent article according to any one of claims 3 to 5, which is an absorbent body having a liquid absorbency, and the upper end portion of the front side of the absorbent body is joined to the front crotch portion, and the rear of the absorbent body is The upper side end portion is connected to the rear side crotch portion, and the foot surrounding elastic members that are stretched in the vertical direction are provided at the two ends in the left and right direction of the absorbent body. The rear non-overlapping area is in the vertical direction. The area overlapping with the appearance range of the stretchability caused by the foot elastic member is counted from the end of one side of the absorbent body in the left-right direction, and the end of one side of the absorbent body in the left-right direction. At least one of the hole portions is provided at a position that is at least a half of a distance from an end of one side of the rear trunk portion. The absorptive article according to any one of claims 1 to 5, wherein the rear side crotch portion includes a rear side overlap region overlapping the front side crotch portion in the front-back direction, and the front side crotch portion. The non-overlapping area on the rear side does not overlap in the front-rear direction, and the number of the holes per unit area in the rear-side non-overlapping area is greater than the number of holes per unit area in the rear-side overlapping area. The number of parts is even smaller.