CN112107428A

CN112107428A - Pants-type absorbent article and method for manufacturing pants-type absorbent article

Info

Publication number: CN112107428A
Application number: CN201910536098.5A
Authority: CN
Inventors: 高桥雄二; 郑凌霜; 史异
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-12-22
Anticipated expiration: 2039-06-20
Also published as: CN112107428B; WO2020255521A1

Abstract

Provided is a pants-type absorbent article (1) having a volatile material (26) which has a long-lasting effect and is less likely to cause excessive irritation to the skin of a wearer. A pants-type absorbent article (1) comprising: an absorbent body (20) having a liquid-absorbent core (22) and a skin side sheet (24) provided on the skin side of the absorbent core (22); and a waist member (10) which is overlapped and joined to the non-skin side of the absorbent main body (20) and stretches and contracts in the left-right direction, wherein a volatile substance (26) is provided on at least one of the non-skin side surface of the skin side sheet (24) and the skin side surface of the absorbent core (22).

Description

Pants-type absorbent article and method for manufacturing pants-type absorbent article

Technical Field

The present invention relates to a pants-type absorbent article and a method of manufacturing a pants-type absorbent article.

Background

A pants-type absorbent article (hereinafter, also simply referred to as an absorbent article) is widely known, which is provided with an absorbent main body having an absorbent core having liquid absorption properties and a volatile material for reducing a feeling of discomfort felt by a wearer or the like. For example, patent document 1 discloses a technique of reducing unpleasant odor derived from excrement by providing a volatile perfume on the outer surface, inner surface, or the like of the waist region 10 of a pants-type absorbent article (pants-type wearing article).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-102612

Disclosure of Invention

Problems to be solved by the invention

In the pants-type absorbent article disclosed in patent document 1, when a perfume (volatile substance) is provided on the inner surface (skin side) of the waist region 10, the components of the volatile substance directly contact the skin of the wearer, and thus there is a possibility that excessive irritation may be given to the skin of the wearer or skin problems such as rash may occur. On the other hand, when a perfume (volatile substance) is provided on the outer surface (non-skin side) of the waist region 10, the amount of the volatile substance to be volatilized may become large and the effect of the volatile substance may be difficult to be sustained.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a pants-type absorbent article including a volatile material which is durable in effect and less likely to cause excessive irritation to the skin of a wearer.

Means for solving the problems

A main invention for achieving the above object is a pants-type absorbent article having a vertical direction and a horizontal direction intersecting each other, and including: an absorbent main body including a liquid-absorbent core and a skin side sheet provided on the skin side of the absorbent core; and a waist member superposed and joined to a non-skin side of the absorbent main body and stretchable in the left-right direction, wherein a volatile substance is provided on at least one of a non-skin side surface of the skin side sheet and a skin side surface of the absorbent core.

Other features of the present invention will be apparent from the description of the specification and the accompanying drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a pants-type absorbent article can be provided that has a volatile material that is durable in effectiveness and that is less likely to cause excessive irritation to the skin of the wearer.

Drawings

Fig. 1 is a schematic perspective view of a pants-type absorbent article 1.

Fig. 2 is a plan view and a schematic cross-sectional view of the pants-type absorbent article 1 in an unfolded state.

Fig. 3 is a plan view of the absorbent main body 20.

3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 3 3 and 3 is 3 a 3 schematic 3 view 3 of 3 the 3 absorbent 3 main 3 body 3 20 3. 3

Fig. 5 is a flowchart showing a method of determining a location to which a temperature sensitive agent 26 is applied.

Fig. 6 is a plan view illustrating the arrangement of the temperature sensitive agent 26 provided in the absorbent article 1.

Fig. 7 is a schematic sectional view of the absorbent article 1 as viewed from B-B in fig. 6.

Fig. 8 is a view showing a state where a longitudinal fold formed in the absorbent main body 20 is in contact with a wearer.

Fig. 9 is a flowchart of the respective steps of manufacturing the absorbent main body 20.

Fig. 10 is a schematic diagram illustrating a manufacturing apparatus 100 for manufacturing the absorbent article 1.

Fig. 11 is a plan view of the pants-type absorbent article 200 in an unfolded state using the waistline elastic band 16.

Fig. 12 is a plan view of a developed state of the pants-type absorbent article 300 in which the front stretchable sheet 12f and the rear stretchable sheet 12b are divided into two pieces.

Description of the reference numerals

1: pant-type absorbent article, 1 a: waist opening, 1 b: leg hole opening portion, 10: waist component

10 f: front waist member, 10 fe: front-side joint, 10 ff: waist front end

10 b: rear side waist member, 10 be: rear side joint, 10 bf: waist back end

10 et: upper end (predetermined position), 12: telescopic sheet (Telescopic film)

12 f: front stretchable sheet, 12 fa: waist front side stretchable sheet

12 fb: main body front stretchable sheet, 12 b: rear stretchable sheet

12 ba: waist rear stretchable sheet, 12 bb: stretchable sheet on rear side of main body

14: non-stretchable sheet, 15: 1 st piece, 16: waist rubber band

20: absorbent main body, 20 es: two ends, 20 et: upper end (outer end), 20H: space(s)

22: absorbent core, 22 a: core wrap sheet, 22 et: upper end, 24: skin side sheet

24L: skin side panel continuum, 25: non-skin side sheet, 25 a: liquid-impermeable sheet

25 b: liquid-permeable sheet, 25 c: projection, 25L: non-skin side sheet continuum

26: temperature sensitive agent (volatile substance), 26A: 1 st overlap area

26B: slice 1 non-overlapping region, 26 p: temperature sensitive agent-coated region, 26 n: non-coated area

30: crotch elastic band, 40: turning part, 50: three-dimensional gather, 50B: fulcrum, 50S: vertex point

51: three-dimensional gather elastic member, 60: post-processing belt

100: manufacturing apparatus, 110: conveying mechanism, 120: temperature sensing agent coating mechanism

130: adhesive application mechanism, 140: joining mechanism, 141: press roll

150: bending mechanism, 160: cutting mechanism, 161: cutting roller

200: pant-type absorbent article, 300: pant-type absorbent article, CL: center line

YS: ultrasonic joint, ZS: ultrasonic bonding part

Detailed Description

At least the following matters will be made clear from the description of the present specification and the attached drawings.

A pants-type absorbent article having a vertical direction and a horizontal direction intersecting each other, comprising: an absorbent main body including a liquid-absorbent core and a skin side sheet provided on the skin side of the absorbent core; and a waist member superposed and joined to a non-skin side of the absorbent main body and stretchable in the left-right direction, wherein a volatile substance is provided on at least one of a non-skin side surface of the skin side sheet and a skin side surface of the absorbent core.

According to such a pants-type absorbent article, it is possible to provide a pants-type absorbent article provided with a volatile material that has a long-lasting effect and is less likely to cause excessive irritation to the skin of the wearer.

The pants-type absorbent article desirably has the volatile substance as a temperature-sensitive agent or a cold-sensitive agent for stimulating a temperature-sensitive TRP channel.

According to such a pants-type absorbent article, the temperature sensitive agent or the cooling agent comes into contact with the skin of the wearer through the nonwoven fabric, and therefore the wearer can gradually feel the effect of the temperature sensitive agent or the cooling agent on the skin.

In the pants-type absorbent article, it is desirable that the waist member has a 1 st sheet laminated on the skin side of the absorbent main body in at least a part of the region, and has a portion where the 1 st sheet and the volatile material overlap with each other when viewed in the front-rear direction.

According to such a pants-type absorbent article, the effect of the volatile material is sustained for a long period of time, and irritation to the skin of the wearer can be suppressed.

The pants-type absorbent article desirably has a portion where the 1 st panel and the absorbent main body overlap and the 1 st panel and the volatile material do not overlap when viewed in the front-rear direction.

According to such a pants-type absorbent article, the effect of the volatile material has a quick-acting property, and the skin of the wearer can be easily irritated.

In this pants-type absorbent article, it is desirable that the area of the portion where the 1 st sheet and the absorbent main body overlap and the 1 st sheet and the volatile material do not overlap is larger when viewed in the front-rear direction than the area of the portion where the 1 st sheet and the volatile material overlap when viewed in the front-rear direction.

According to such a pants-type absorbent article, the effect of the volatile material can be easily partially sustained while the volatile material provides a strong overall stimulation to the body of the wearer.

In the pants-type absorbent article, the 1 st panel desirably has a high-density portion in which the density of the 1 st panel is higher than the density of the surrounding portions, and has a portion in which the high-density portion and the volatile material overlap each other when viewed in the front-rear direction.

According to such a pants-type absorbent article, the effect imparted by the volatile substance to the wearer can be easily controlled.

In the pants-type absorbent article, it is desirable that at least a part of the volatile material is provided in a region above an upper end of the absorbent core in the vertical direction.

According to such a pants-type absorbent article, the effect of the volatile material can be sustained for a long period of time.

In the pants-type absorbent article, the volatile material is desirably provided continuously from one end portion to the other end portion of the absorbent main body in the longitudinal direction.

According to such a pants-type absorbent article, the volatile material can be allowed to act over a wide range from the lower abdomen portion to the crotch portion and the sacrum portion of the wearer.

In the pants-type absorbent article, it is desirable that a pair of the volatile materials be provided at both end portions in the width direction of the absorbent main body, and the volatile material be not provided at the central portion in the width direction of the absorbent main body.

According to such a pants-type absorbent article, it is possible to suppress irritation that acts strongly on the vagina and the like, and to cause a volatile substance to act efficiently on the lymph and the like of the part of the rat.

In the pants-type absorbent article, the volatile material is desirably provided on the front side of the center of the absorbent main body in the front-rear direction.

According to such a pants-type absorbent article, the effect of the volatile material can be imparted to the lower abdomen of the wearer.

In the pants-type absorbent article, the volatile material is desirably provided on the rear side of the center of the absorbent main body in the front-rear direction.

According to such a pants-type absorbent article, the effect of the volatile material can be imparted to the sacral portion of the wearer.

In the pants-type absorbent article, it is desirable that the amount of the volatile material provided in the front-rear direction on the front side of the center of the absorbent main body is larger than the amount of the volatile material provided in the front-rear direction on the rear side of the center of the absorbent main body.

According to such a pants-type absorbent article, a greater effect of volatile substances can be imparted to the lower abdominal region than to the sacral region of the wearer.

The pants-type absorbent article desirably has a region where the waist member is stretchable in the left-right direction and a portion where the volatile material overlaps, as viewed in the front-back direction.

According to such a pants-type absorbent article, the distance between the skin of the wearer and the volatile material is increased, and the amount of leakage of the volatile material can be controlled.

In the pants-type absorbent article, it is desirable that a pair of three-dimensional gathers capable of standing up toward the skin of the wearer are provided on both sides in the left-right direction of the absorbent main body.

According to such a pants-type absorbent article, volatile materials are accumulated in the closed space formed between the standing three-dimensional gathers, and are difficult to be discharged to the outside.

In the pants-type absorbent article, it is preferable that the waist member has a stretchable film stretchable in the left-right direction, and has a portion where the stretchable film and the volatile material overlap each other when viewed in the front-back direction, and the stretchable film is disposed on a non-skin side of the volatile material in a thickness direction.

According to such a pants-type absorbent article, the volatile material is inhibited from passing through the non-skin side of the waist member.

The pants-type absorbent article desirably has a post-treatment belt for holding the pants-type absorbent article in a rolled state when the used pants-type absorbent article is discarded, and the waist member has a portion where the post-treatment belt and the volatile material overlap each other when viewed in the front-rear direction, and the post-treatment belt is disposed on the non-skin side of the volatile material in the thickness direction.

A method for manufacturing a pants-type absorbent article having an absorbent main body and a waist member superposed and joined to a non-skin side of the absorbent main body, the method comprising: a conveying step of conveying a skin side sheet disposed at a position closest to a skin side of the absorbent main body, a non-skin side sheet disposed at a position closest to a non-skin side of the absorbent main body, and an absorbent core provided between the skin side sheet and the non-skin side sheet in a predetermined conveying direction, respectively; a volatile substance application step of applying a volatile substance to a non-skin side surface of the skin side sheet; an adhesive application step of applying an adhesive to a non-skin-side surface of the skin side sheet; and a joining step of laminating and joining the absorbent core to the non-skin-side surface of the skin side sheet.

According to the method for manufacturing a pants-type absorbent article, it is possible to provide a pants-type absorbent article having a volatile material which is durable in effect and less likely to cause excessive irritation to the skin of the wearer.

In the method for producing a pants-type absorbent article, it is preferable that the adhesive application step is performed after the volatile material application step is performed.

According to the method for manufacturing a pants-type absorbent article, it is easy to suppress occurrence of poor adhesion and the like due to drying of the adhesive during conveyance.

In the embodiment 1, the following embodiments are not to be considered in all respects

A pants-type absorbent article 1 provided with a temperature sensitive agent 26 (volatile material) described later will be described as an example of an absorbent article provided with a volatile material according to embodiment 1. In the following description, the absorbent article 1 for physiological use is described, but the absorbent article 1 of the present embodiment includes, for example, diapers for adults and infants, and the use is not limited to physiological use.

< basic Structure of absorbent article 1 >

Fig. 1 is a schematic perspective view of a pants-type absorbent article 1, and fig. 2 is a plan view and a cross-sectional schematic view of the pants-type absorbent article 1 in an unfolded state.

In the pants-type state shown in fig. 1, the absorbent article 1 has a "vertical direction", a "horizontal direction", and a "front-rear direction" that intersect with each other. The vertical direction of the paper surface in fig. 1 is the vertical direction, the upper side (lower side) of the paper surface is the "upper" ("lower") in the vertical direction, and the left side (right) of the paper surface is the left side (right) in the left-right direction. In the front-rear direction, the side that becomes the abdomen side of the wearer when worn is referred to as the "front side", and the side that becomes the back side of the wearer is referred to as the "rear side".

In the developed state of the absorbent article 1 shown in fig. 2 (the state in which the pant-type absorbent article 1 is spread out on a plane before being formed into a pant-type), the absorbent article 1 has a "longitudinal direction", "width direction", and "thickness direction" that intersect each other. The longitudinal direction of the paper surface in fig. 2 is defined as the longitudinal direction, the upper side (lower side) of the paper surface is defined as the "front (ventral side)" of the longitudinal direction ("rear (dorsal side)"), the direction perpendicular to the longitudinal direction on the paper surface is defined as the width direction, and the left side (right side) of the paper surface is defined as the left (right) of the width direction. The direction (direction penetrating the paper surface) perpendicular to the longitudinal direction and the width direction is defined as the thickness direction, and the side in contact with the skin of the wearer in the thickness direction is defined as the "skin side" and the opposite side is defined as the "non-skin side".

The top view (for example, fig. 2) of the present embodiment shows the extended state of the object. Here, the "extended state" refers to a state in which the members shown in a plan view are extended without wrinkles by extending each elastic body (for example, a crotch elastic band 30, a stretchable sheet 12 (corresponding to a stretchable film), and the like described later) provided in the absorbent article 1. For example, fig. 2 shows a state in which the waist member 10 and the absorbent body 20, which will be described later, constituting the absorbent article 1 are extended until the dimensions of the members alone match or are close to the dimensions of the members. The non-stretched state, in which each elastic body naturally contracts to cause wrinkles and the like in each member, is referred to as a "natural state".

The absorbent article 1 of the present embodiment includes the waist member 10 and the absorbent main body 20, and hereinafter, a process of forming the waist member 10 and the absorbent article 1 into a pants-type article will be described first. Then, the absorbent main body 20 will be explained later. In the present embodiment, the absorbent body 20 is provided with the temperature sensing agent 26.

As shown in fig. 2, the waistline member 10 has a substantially hourglass shape in a plan view in a deployed state. That is, the center portion in the longitudinal direction is recessed inward in the width direction, and the recessed portion forms a pair of leg hole openings 1b shown in fig. 1 when formed into a pants-type.

The waist member 10 has a front waist member 10f located on the front side of a center line CL located at the center of the absorbent article 1 in the longitudinal direction and a rear waist member 10b located on the rear side of the center line CL. The front waist member 10f (rear waist member 10b) has a waist front end portion 10ff (waist rear end portion 10bf) extending in the width direction at the front (rear) end portion and front joining portions 10fe (rear joining portions 10be) extending in the longitudinal direction provided at both left and right end portions (both are oblique lines inclined downward to the right in fig. 2).

In addition, the lumbar member 10 of the present embodiment includes: a non-stretchable sheet 14 formed in the shape of the waist member 10 and having almost no stretchability in the right-left direction; and a stretchable sheet 12 (a front stretchable sheet 12f and a rear stretchable sheet 12b) which is laminated on a part of the skin-side surface of the non-stretchable sheet 14 and has stretchability in the left-right direction. The non-stretchable sheet 14 is partially stretched out in the longitudinal direction (vertical direction) to the outer side of the outer end 20et of the absorbent main body 20, folded back at a predetermined position 10et in the longitudinal direction to the inner side in the longitudinal direction and the skin side in the thickness direction, and joined to the non-stretchable sheet 14 and the absorbent main body 20 in a state of being laminated on the skin side. Hereinafter, the portion where the non-stretchable sheet 14 is folded back is also referred to as the 1 st sheet 15, and the predetermined position 10et where the non-stretchable sheet 14 is folded back is also referred to as the upper end 10et of the lumbar member 10.

The 1 st sheet 15 may be a sheet member different from the non-stretchable sheet 14. That is, the 1 st sheet 15 may be formed not by folding back the non-stretchable sheet 14 at the upper end 10et but by a sheet member such as a nonwoven fabric separate from the non-stretchable sheet 14.

As described above, the lumbar member 10 according to the present embodiment includes a plurality of sheets, and at least one of the plurality of sheets has stretchability in the left-right direction. When the absorbent article 1 is worn, the waistline member 10 fits along the waistline of the wearer due to the stretchability.

The bonding of the plurality of sheets to each other is performed by forming a plurality of ultrasonic bonding portions dispersed by ultrasonic bonding (ultrasonic sealing) to which ultrasonic vibration and pressure are applied. That is, the plurality of sheets are bonded by the plurality of ultrasonic bonding portions which are scattered in a state of being overlapped in the thickness direction (front-rear direction). In other words, in the joining of a plurality of sheets, the entire joining range of the sheets is not constituted by the ultrasonic joining portion, but is constituted by the ultrasonic joining portion and the non-ultrasonic joining portion. The ultrasonic bonding portions are provided at regular intervals, which are different depending on whether or not the region overlaps the absorbent main body 20 when viewed in the thickness direction.

The waistline member 10 of the present embodiment has different intervals of the ultrasonic bonding sections with respect to the absorbent body overlapping region overlapping with the absorbent body 20 (the region where the stretchable sheet 12 overlaps with the absorbent body 20, the region of the oblique line inclined upward to the right indicated by X in fig. 2) and the absorbent body non-overlapping region not overlapping with the absorbent body 20 (the region where the stretchable sheet 12 does not overlap with the absorbent body 20, the region excluding the region of the stretchable sheet 12 indicated by X inclined upward to the right).

In the absorbent body overlapping region, as shown in the enlarged view of the Y portion in fig. 2, the ultrasonic bonding portions YS are formed in substantially rectangular shapes having substantially the same size, and a shape obtained by inclining the substantially rectangular shape standing upright in the width direction by 45 degrees and a shape obtained by inclining the substantially rectangular shape by-45 degrees are regularly and substantially uniformly arranged, respectively. In the absorbent body non-overlapping region, as shown in the enlarged view of the Z portion in fig. 2, the ultrasonic bonding portions ZS are formed in a circular shape having substantially the same size and are distributed substantially uniformly at intervals larger than the ultrasonic bonding portions YS.

Therefore, when the areas of the ultrasonic wave joining portions per unit area of the absorbent body overlapping region and the absorbent body non-overlapping region are compared, the area of the ultrasonic wave joining portion per unit area of the absorbent body overlapping region is large. That is, the area of the ultrasonic bonding portion YS per unit area in the absorbent body overlapping region is larger than the area of the ultrasonic bonding portion ZS per unit area in the absorbent body non-overlapping region.

In the process of producing the absorbent article 1 in the pants-type form, first, the absorbent body 20 is disposed at a predetermined position of the waist member 10 in the unfolded state, and the absorbent article 1 in the unfolded state is produced. That is, the surface of the absorbent main body 20 on the non-skin side is used as a joint surface, and the joint surface is placed on and joined to a predetermined position of the lumbar member 10 in the unfolded state. That is, the lumbar member 10 is disposed to overlap the non-skin side of the absorbent main body 20 in the thickness direction.

Then, the absorbent main body 20 and the waistline member 10 in the unfolded state are folded in the longitudinal direction. That is, the absorbent main body 20 and the waistline member 10 are folded in the longitudinal direction so that the skin side of the front waistline member 10f and the skin side of the rear waistline member 10b face each other with the longitudinal center line CL shown in fig. 2 as a fold.

In this way, the front joining section 10fe and the rear joining section 10be of the lumbar member 10 approach each other, and therefore the left and right front joining sections 10fe and the rear joining section 10be are joined to each other.

That is, both right and left end portions of the lumbar member 10 are joined in the longitudinal direction, and thus the lumbar front end portion 10ff and the lumbar rear end portion 10bf of the lumbar member 10 form the lumbar opening portion 1a on the upper side of the lumbar member 10.

The pants-type absorbent article 1 has the following structure: the lumbar member 10 abuts against the front side (abdomen) and the rear side (back) of the wearer's body (abuts against the waist of the wearer), and does not fall down when worn due to mainly the stretching and contraction (tightening to the body) of the lumbar member 10 in the left-right direction. Therefore, the absorbent body 20 joined to the lumbar member 10 is supported in the vertical direction by the lumbar member 10 in a state of being in contact with the crotch portion of the wearer (a portion from the crotch portion to the sacrum portion of the buttocks (buttocks) where the absorbent body 20 is in contact with the skin of the wearer when worn).

That is, the absorbent article 1 is a pants-type article having an abdomen portion, a back portion, and a crotch portion, and formed with a waist opening 1a and a pair of leg hole openings 1b, and is supported so as not to fall down when worn by the stretchable sheet 12 and the like included in the waist member 10.

The term "contact" means a state in which at least a part of a member comes into contact with a wearer, and the member comes into contact with the wearer. For example, a state in which the stretchable portion of the waistline member 10 is in contact with the wearer and the non-stretchable portion is not in contact with the wearer is a state in which the waistline member 10 is in contact with the wearer.

Further, as a joining method for joining the absorbent body 20 and the waistline member 10 and the like described above, for example, a known joining method such as an adhesive, heat sealing, ultrasonic sealing, or a combination thereof can be exemplified.

As shown in the sectional view of fig. 2, a post-treatment belt 60 is provided on the non-skin-side surface of the lumbar member 10. The finishing tape 60 is a strip-shaped member (tape member) having a substantially rectangular shape that is long in the vertical direction, one side in the vertical direction (longitudinal direction) is fixed to the lumbar member 10, and the other side in the vertical direction (longitudinal direction) has an adhesive portion. The adhesive portion is coated with an adhesive, and before the absorbent article 1 is used, a part of the post-treatment tape 60 is folded with the adhesive portion as an inner side so as to protect the adhesive surface so that the adhesive portion is not exposed to the outside.

When the used absorbent article 1 is to be discarded, the folded finishing tape 60 is stretched and pulled against the absorbent article 1 that is rolled up in the vertical direction so that the absorbent body 20 is positioned inside, the adhesive portion is exposed, and the adhesive portion side is wound around the absorbent article 1. This allows the absorbent article 1 to be held in a rolled state, and the absorbent article 1 to be discarded without leakage of excrement or the like adhering to the inside (absorbent body 20) of the absorbent article 1 to the outside.

< absorbent body 20>

Next, the absorbent main body 20 will be explained using fig. 3 and 4. 3 fig. 3 3 3 is 3 a 3 plan 3 view 3 of 3 the 3 absorbent 3 main 3 body 3 20 3, 3 and 3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 of 3 the 3 absorbent 3 main 3 body 3 20 3 as 3 viewed 3 from 3 a 3- 3 a 3 in 3 fig. 3 3 3. 3

The absorbent main body 20 is a sanitary absorbent article, such as a sanitary napkin. As shown in fig. 3, the absorbent body 20 of the present embodiment is substantially rectangular in plan view, with the longitudinal direction in the extended and stretched state (i.e., the longitudinal direction of the absorbent body 20) along the vertical direction of the absorbent article 1. As shown in fig. 4, the absorbent main body 20 includes an absorbent core 22 extending in the longitudinal direction (vertical direction), a skin-side sheet 24 disposed on the skin side of the absorbent core 22, and a non-skin-side sheet 25 disposed on the non-skin side of the absorbent core 22. A temperature sensitive agent 26, which will be described later, is provided in a predetermined region of the absorbent main body 20.

The absorbent core 22 is obtained by molding a liquid absorbent material into a predetermined shape, and in the present embodiment, is formed into a substantially rectangular shape in plan view (hatched portion inclined upward to the right in fig. 3) and a convex shape in cross-section (hatched portion in fig. 4). Examples of the liquid-absorbent material include pulp fibers and other liquid-absorbent fibers containing a super absorbent polymer (so-called SAP). The outer peripheral surface of the absorbent core 22 may be covered with a liquid-permeable sheet member (core wrap sheet 22a) such as tissue paper or nonwoven fabric.

The skin side sheet 24 is a liquid-permeable sheet member that can come into contact with the skin of the wearer when worn, and is formed of, for example, a hydrophilic air-through nonwoven fabric, a spunbond nonwoven fabric, or the like. The skin side sheet 24 may have a structure of 2 or more layers. For example, the skin-side sheet 24 may have a second sheet (not shown in fig. 4) on the non-skin side, which is a sheet member having substantially the same function and structure as the skin-side sheet.

The non-skin side sheet 25 has a two-layer structure including a liquid-impermeable sheet 25a for preventing exposure of excretory fluid such as menstrual blood absorbed by the absorbent core 22 to the outside, and a liquid-permeable sheet 25b disposed on the non-skin side of the liquid-impermeable sheet 25 a. As the liquid impermeable sheet 25a, for example, a resin film such as a polyethylene film or a polypropylene film is used, and as the liquid permeable sheet 25b, for example, a nonwoven fabric having flexibility is used. The skin side sheet 24 and the non-skin side sheet 25 are both sized to cover the entire absorbent core 22.

The liquid-permeable sheet 25b of the non-skin side sheet 25 has an extension portion 25c that extends outward in the width direction from the opposite ends 20es of the absorbent main body 20. The extension portion 25c is bent toward the skin side in the thickness direction with the fulcrum 50B as a bending origin at both ends 20es in the width direction of the absorbent main body 20, and is folded back toward the non-skin side at an apex 50S located closer to the skin side than the skin side sheet 24, thereby forming a three-dimensional gather 50 (see fig. 4). The three-dimensional gather elastic member 51 such as a rubber band extending in the longitudinal direction of the absorbent main body 20 is disposed at the apex 50S of the three-dimensional gather 50 in an extended state in the longitudinal direction, and when the absorbent article 1 is worn, the apex 50S is raised toward the skin of the wearer due to the stretchability exhibited by the three-dimensional gather elastic member 51. Thus, the three-dimensional gathers 50 function as a leakage preventing wall for suppressing side leakage of excretory fluid or the like.

The three-dimensional gathers 50 are preferably made of the same number of nonwoven fabrics from the fulcrum 50B to the vertex 50S, and more specifically, preferably 2 or more sheets, in order to prevent the temperature sensitive agent 26 from leaking outward.

A crotch rubber band 30 which can expand and contract in the longitudinal direction is provided between the liquid-impermeable sheet 25a and the liquid-permeable sheet 25b in the thickness direction. As shown in fig. 3 and 4, the crotch elastic band 30 is provided at the center portion in the left-right direction (width direction) of the absorbent main body 20 from the front side where the lower abdomen portion abuts to the rear side where the hip portion abuts via the crotch portion.

In addition, a plurality of turning portions (japanese: ヒンジ)40 are formed on the skin side of the absorbent main body 20 (absorbent core 22). The hinge 40 is formed in a concave shape recessed from the skin side toward the non-skin side on the skin side of the absorbent main body 20 (absorbent core 22) as shown in fig. 4, so that the absorbent main body 20 deforms (becomes a deformed fold) along the wearer's body when the wearer wears the absorbent article 1. The concave shape of the folding portion 40 is formed by, for example, compressing the absorbent main body 20 (absorbent core 22) from the skin side, and is a high-density portion where the density of the absorbent core 22 is higher than the density around the absorbent core and is a compression groove.

A temperature sensitive agent 26 as a volatile substance is provided between the skin side sheet 24 and the absorbent core 22 in the thickness direction of the absorbent main body 20. The temperature sensitive agent 26 is provided for alleviating physiological pain and chill symptoms of the wearer, contains a temperature sensitive stimulant which gives a stimulus to the temperature of the wearer to warm the wearer, and is provided in a state of being mixed with a solvent which is a volatile substance.

In the present embodiment, the temperature sensitive agent 26 is applied to the non-skin side surface (the black portion in fig. 4) of the skin side sheet 24 in the thickness direction, and is not applied to a place in contact with the skin of the wearer. The temperature sensitive agent 26 may be provided on the skin-side surface of the absorbent core 22. That is, the temperature sensitive agent 26 may be provided on at least one of the skin-side surface of the absorbent core 22 and the non-skin-side surface of the skin side sheet 24.

As shown in fig. 3, the temperature sensitive agent 26 is applied to a pair of temperature sensitive agent application regions 26p (hatched portions inclined downward to the right in fig. 3) along the longitudinal direction, which have a predetermined dimension in the width direction (short-side direction) of the absorbent main body 20 and continue from the front end to the rear end in the longitudinal direction of the absorbent main body 20. Therefore, a non-coated region 26n where the temperature sensitive agent 26 is not coated along the longitudinal direction is provided at the center portion in the width direction of the absorbent main body 20.

The temperature sensitive agent 26 is preferably provided so as not to be mixed with an adhesive for bonding various members. For example, when the temperature sensitive agent 26 is mixed with an adhesive for bonding the crotch rubber band 30, the bonding strength of the crotch rubber band 30 is reduced, and the original elastic effect may not be exhibited. Therefore, it is preferable to use other bonding means such as the ultrasonic bonding described above instead of the bonding with an adhesive in a place where the temperature sensitive agent application region 26p and the adhesive may be mixed.

The thermal stimulant is preferably a plant-derived compound from the viewpoint of the wearer's feeling of comfort. Examples of the warm-feeling stimulants include capsaicin (capsicoside), capsaicin (LD 50: 47mg/kg, molecular weight: 305), capsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, synthetic capsaicin, etc.), capsorubin, benzyl nicotinate (LD 50: 2188mg/kg, molecular weight: 213), β -butoxyethyl nicotinate, N-acyl vanillylamide, vanillyl nonanoate, polyhydric alcohol, paprika, capsicum tincture, capsicum extract, vanillyl nonanoate, vanillyl alcohol alkyl ether derivatives (e.g., vanillyl ethyl ether, vanillyl butyl ether (LD 50: 4900mg/kg, molecular weight: 210), vanillyl amyl ether, vanillyl hexyl ether), isovanillyl alcohol alkyl ether, ethyl vanillyl alcohol alkyl ether, resveratrol derivatives, substituted benzyl alcohol alkyl ethers, vanillin propylene glycol acetal, and propylene glycol derivative, Ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, gingerol (LD 50: 250mg/kg, molecular weight: 294), zingerone, hesperidin, pyrrolidone carboxylic acid, and any combination thereof.

The solvent is not particularly limited as long as it can contain a temperature sensitive stimulant, and examples thereof include lipophilic solvents and hydrophilic solvents. The solvent is capable of dissolving, dispersing, etc., the warming stimulant, for example.

Examples of the lipophilic solvent include oils and fats, for example, natural oils (for example, fatty acid esters such as triglycerides, coconut oil, linseed oil, and tri (caprylic/capric) glyceride), hydrocarbons (for example, paraffin, for example, liquid paraffin), and the like.

Examples of the hydrophilic solvent include water and alcohol. Examples of the alcohol include lower alcohols such as methanol, ethanol, ethylene glycol and glycerol, and higher alcohols such as octanol, lauryl alcohol and myristyl alcohol.

In addition, the warming agent 26 preferably stimulates a temperature sensitive TRP channel. For example, TRPV1, which is one of temperature-sensitive TRP channels, is activated by stimulation with capsaicin, acid, or the like. Further, when TRPV1 of the wearer is activated, heat generation is caused via the sympathetic nervous system (the wearer generates heat in the body).

That is, it is preferable that the wearer is warmed without raising the temperature of the wearer itself, such as capsaicin, rather than the temperature of the wearer itself, such as a disposable warmer for carrying. In this way, the wearer can feel cool and warm without being burnt by low temperature or being burned.

Further, the effect of the temperature sensitive agent 26 is difficult to be produced unless it is in direct contact with the skin of the wearer. That is, for example, although a volatile substance such as a perfume can exhibit an effect of suppressing peripheral odor when it is a gas, the temperature sensitive agent 26 exerts its main effect by being in direct contact with the skin of the wearer after being vaporized. Therefore, the wearer can gradually feel the effect of the temperature sensitive agent 26 on the skin by bringing the temperature sensitive agent 26 into contact with the skin of the wearer through the nonwoven fabric or the like.

< method for determining Member coated with temperature-sensitive agent 26 >

Next, a determination method of the member (position in the thickness direction) coated with the temperature sensitive agent 26 is described using fig. 5. In the present embodiment, the determination is performed by sensory examination. Fig. 5 is a flowchart showing a method of determining a location to which a temperature sensitive agent 26 is applied.

It has been described that the absorbent main body 20 of the present embodiment has a plurality of members (the skin side sheet 24, the core wrap sheet 22a, the absorbent core 22, and the non-skin side sheet 25 (the liquid-impermeable sheet 25a and the liquid-permeable sheet 25b)), but in the case where a plurality of members are laminated as described above, which member is coated with the temperature sensitive agent 26 can be determined as follows.

First, a plurality of sheets of the absorbent main body 20 coated with the temperature sensitive agent 26 are cut into a predetermined size, and the laminated members 1 are peeled 1 by 1 to produce sample sheets (the decomposed skin side sheet 24, core wrap sheet 22a, absorbent core 22, and non-skin side sheet 25 (liquid impermeable sheet 25a and liquid permeable sheet 25b)) (S1). In the present embodiment, each sample sheet is prepared by 60 sheets for each sample sheet.

Next, two sample sheets (for example, the skin side sheet 24) are prepared, and two PE sheets having the same size as the sample sheets are prepared (S2).

Subsequently, the 1 st PE sheet was superimposed on the non-skin side surface of the 1 st sample sheet (S3), and the skin side surface of the 1 st sample sheet was placed on the inner sides of the two arms of the examiner in sensory examination (S4).

Thus, the time T1 until the examiner feels the effect of temperature-sensitive agent 26 on the temperature-sensitive agent of the 1 st sample sheet was measured and recorded (S5).

Subsequently, the 2 nd PE sheet was superimposed on the skin-side surface of the 2 nd sample sheet (S6), and the non-skin-side surface of the 2 nd sample sheet was placed on the inner sides of the two arms of the examiner in sensory examination (S7).

Thus, the time T2 until the examiner feels the effect of temperature-sensitive agent 26 on the temperature-sensitive agent of the 2 nd sample sheet was measured and recorded (S8).

From the measurements of time T1 and time T2, the time from when the sample piece was leaned on the inner sides of both arms of the examiner to when the examiner felt the effect of temperature of the temperature sensitive agent 26 on the non-skin side surface and the skin side surface of the sample piece was confirmed. Then, the confirmation is repeated 30 times (steps S2 to S8), and the average times of T1 and T2 are calculated and compared (S9).

That is, the average time T1a until the examiner feels the effect of temperature sensation on the skin side of the sample sheet and the average time T2a until the examiner feels the effect of temperature sensation on the non-skin side of the sample sheet are compared, and the shorter one is set to be closer to the application part (application surface) of the temperature sensitive agent 26. Specifically, if T1a is shorter than T2a, it can be determined that the skin-side surface of the sample piece is close to the application surface of the temperature sensitive agent 26, and if T2a is shorter than T1a, it can be determined that the non-skin-side surface of the sample piece is close to the application surface of the temperature sensitive agent 26.

Then, the sample sheets (the decomposed skin side sheet 24, core wrap sheet 22a, absorbent core 22, and non-skin side sheet 25 (liquid-impermeable sheet 25a and liquid-permeable sheet 25b)) were all identified. That is, the average time taken for the examiner to feel the temperature effect of the temperature sensitive agent 26 is calculated on the skin-side surface and the non-skin-side surface of each of the decomposed skin side sheet 24, core wrap sheet 22a, absorbent core 22, and non-skin side sheet 25 (liquid-impermeable sheet 25a and liquid-permeable sheet 25 b). By comparing the calculation results in this way, the location where the temperature sensitive agent 26 is applied can be specified. That is, the location where the average time taken for the examiner to feel the temperature effect of the temperature sensitive agent 26 is the shortest (for example, the non-skin side surface of the skin side sheet 24) can be determined as the location where the temperature sensitive agent 26 is applied.

In the present embodiment, the total of T1a and the total of T2a of the respective sample sheets (the decomposed skin side sheet 24, core wrap sheet 22a, absorbent core 22, and non-skin side sheet 25 (liquid-impermeable sheet 25a and liquid-permeable sheet 25b)) are compared, and the total of T1a is short. In other words, it can be said that the total amount (transfer amount) of the temperature sensitive agents 26 contacted (transferred) from the skin side of each sample piece to the skin of the examinee is larger than the total amount (transfer amount) of the temperature sensitive agents 26 contacted (transferred) from the non-skin side to the skin of the examinee in the same period (the temperature sensitive effect is felt earlier, so the temperature sensitive effect is felt in a longer period).

The vaporized temperature sensitive agent 26 also moves in the vertical direction and the lateral direction in the interior of the absorbent article 1 (the space surrounded by the sheet member). Therefore, in the region where the temperature sensitive agent 26 is not applied, the temperature sensitive agent 26 may be detected by sensory inspection. In this case, whether or not the region is coated with the temperature sensitive agent 26 can be determined by comparing the average time until the examiner feels the temperature sensitive effect of the temperature sensitive agent 26.

< specific configuration of temperature sensitive agent 26 >

Next, with reference to fig. 3,4, and 6 to 8, the relationship between the position of the absorbent article 1 where the temperature sensitive agent 26 is disposed and other members will be described. Fig. 6 is a plan view illustrating the arrangement of the temperature sensitive agent 26 provided in the absorbent article 1, and fig. 7 is a schematic sectional view of the absorbent article 1 as viewed from B-B in fig. 6. Fig. 8 will be described later.

When the temperature sensitive agent 26 is provided on the inner surface (skin side) of the absorbent article 1, the components of the temperature sensitive agent 26 that volatilize come into direct contact with the skin of the wearer, and therefore, there is a possibility that excessive irritation may be caused to the skin of the wearer, or skin problems such as rash may occur. On the other hand, when the temperature sensitive agent 26 is provided on the outer surface (non-skin side) of the absorbent article 1, the amount of volatilization of the temperature sensitive agent 26 may increase, and the effect of the temperature sensitive agent 26 may be difficult to last.

In contrast, as shown in fig. 7, the temperature sensitive agent 26 of the present embodiment is provided on the non-skin side of the skin side sheet 24 of the absorbent main body 20 and on the skin side of the absorbent core 22. That is, the temperature sensitive agent 26 is provided on at least one of the non-skin side surface of the skin side sheet 24 and the skin side surface of the absorbent core 22.

Further, by disposing the temperature sensitive agent 26 at this position, when the absorbent body 20 is pressed against the skin of the wearer by the expansion and contraction of the waistline member 10 (stretchable sheet 12), the temperature sensitive agent 26 does not directly contact the skin of the wearer, and therefore, the occurrence of skin problems such as redness, itching, or rash on the skin of the wearer can be suppressed. The temperature sensitive agent 26 is disposed so as to be sandwiched between the skin side sheet 24 and the absorbent core 22 of the absorbent main body 20 from both sides in the thickness direction, and is not exposed to the atmosphere, and therefore, excessive volatilization is suppressed. Therefore, the effect of the temperature sensitive agent 26 can be sustained. That is, the pants-type absorbent article 1 provided with the temperature sensitive agent 26 which has a long lasting effect and is less likely to cause excessive irritation to the skin of the wearer can be provided.

The absorbent article 1 has the 1 st sheet 15 (folded back of the non-stretchable sheet 14) superposed on the skin side of the absorbent main body 20, and at least a part of the temperature sensitive agent 26 has a portion superposed on the 1 st sheet 15 (the 1 st superposed region 26a, the diagonally upward hatched portion in fig. 6) when viewed in the front-rear direction.

In this case, in the 1 st overlapping area 26A where the temperature sensitive agent 26 and the 1 st sheet 15 overlap, the temperature sensitive agent 26 reaches the skin of the wearer after passing through the 1 st sheet 15 from the non-skin side to the skin side. That is, by providing the 1 st overlapping area 26A, the time taken for the temperature sensitive agent 26 to reach the skin of the wearer and the amount of arrival (concentration) can be adjusted. Therefore, the effect of the temperature sensitive agent 26 is sustained for a long period of time, and irritation to the skin of the wearer can be suppressed.

In addition, the absorbent article 1 has a portion where at least a part of the temperature sensitive agent 26 does not overlap with the 1 st sheet 15 when viewed in the front-rear direction (the 1 st sheet non-overlapping area 26 b. the hatched portion inclined downward to the right of fig. 6).

In the 1 st non-overlapping area 26B where the temperature sensitive agent 26 and the 1 st sheet 15 do not overlap, the temperature sensitive agent 26 is more likely to reach the skin of the wearer than in the 1 st overlapping area 26A. Therefore, the effect of the temperature sensitive agent 26 is quick-acting, and can easily cause irritation to the skin of the wearer.

In the absorbent article 1, the area of the 1 st overlapping region 26A is smaller than the area of the 1 st non-overlapping region 26B.

The size of the area of the 1 st overlapping region 26A where the effect of the temperature sensitive agent 26 is easily durable and the size of the area of the 1 st non-overlapping region 26B where the effect of the temperature sensitive agent 26 has a quick-acting property can be different, thereby adjusting what temperature effect is given to the wearer. In addition, when the area of the 1 st overlapped region 26A is smaller than the area of the 1 st non-overlapped region 26B, the quick-acting property of the temperature sensitive agent 26 applied to the body of the wearer can be secured in a large region of the absorbent main body 20, and the effect of the temperature sensitive agent 26 can be easily sustained in a partial region. This can further improve the comfort when wearing the absorbent article 1.

The 1 st sheet 15 may be embossed so that the 1 st sheet 15 has a high-density portion (not shown) in which the density of the embossed portion is higher than that of the periphery thereof. In this case, it is desirable that at least a part of the temperature sensitive agent 26 overlaps with the high density portion of the 1 st sheet 15 when viewed in the front-rear direction.

In the high-density portion, the temperature sensitive agent 26 is less likely to penetrate through the first sheet 15 than in the portion having a lower density in the periphery thereof. That is, at least a portion of the 1 st sheet 15 overlapping with the temperature sensitive agent 26 has a high-density portion when viewed in the front-rear direction, and the temperature sensitive effect given to the wearer can be easily controlled.

As shown in the enlarged views of fig. 7 and 26A of fig. 6, at least a part of the temperature sensitive agent 26 (black area in the enlarged view of 26A) is provided above the upper end 22et of the absorbent core 22 in the vertical direction.

As shown in fig. 7, the absorbent core 22 has a thickness in the thickness direction, and therefore a space 20H is provided in a region located between the upper end 20et of the absorbent main body 20 and the upper end 22et of the absorbent core 22 in the up-down direction. In this way, when the temperature sensitive agent 26 volatilizes, the volatilized temperature sensitive agent 26 temporarily stays in the space 20H, and therefore the effect of the temperature sensitive agent 26 can be sustained for a long period of time.

As shown in fig. 3 and 6, the temperature sensitive agent application region 26p is continuously applied from the front end to the rear end in the longitudinal direction of the absorbent main body 20. That is, the temperature sensitive agent 26 is provided over the entire range in the longitudinal direction of the absorbent main body 20.

Therefore, when the absorbent article 1 is worn, the temperature sensitive agent 26 can act in a wide range from the lower abdomen to the crotch and sacrum of the wearer. This can further improve the comfort when wearing the absorbent article 1.

As shown in fig. 3 and 6, the temperature sensitive agent application regions 26p are temperature sensitive agent application regions 26p paired in the width direction, and a non-application region 26n is provided in the central portion. That is, the temperature sensitive agent 26 is provided at both ends in the width direction (short side direction) of the absorbent main body 20, but is not provided at the center.

Therefore, the temperature sensitive agent 26 is less likely to contact the vagina and the excretory opening located at the center in the width direction in the crotch of the wearer, and strong stimulation acting on the vagina and the like is suppressed. On the other hand, the temperature sensitive agent 26 is likely to contact the groin portion located on both sides in the width direction in the crotch portion of the wearer, and the temperature sensitive agent 26 can be efficiently applied to the lymph of the groin portion and the like.

In particular, since the absorbent article 1 of the present embodiment includes the crotch rubber band 30, the absorbent body 20 is configured to be easily pressed against the wearer's crotch by the contraction force exerted by the crotch rubber band 30. Therefore, by making the widthwise central portion of the absorbent main body 20 the non-application region 26n, it is possible to alleviate the irritation of the vaginal opening or the like by the temperature sensitive agent 26 and to make it difficult for the wearer to feel uncomfortable. Further, by providing both side portions of the absorbent main body 20 in the width direction as the temperature sensitive agent application regions 26p, the temperature sensitive agent 26 can be made to stably act on the groin portion even when the wearer moves both legs to a large extent.

The temperature sensitive agent 26 is provided on the front side in the front-rear direction of the absorbent main body 20 (on the abdomen side with respect to the center line CL in the longitudinal direction).

Therefore, the temperature sensitive agent 26 can be made to easily act on the front side of the crotch portion of the wearer when the absorbent article 1 is worn. This can provide a temperature-sensitive agent effect to the lower abdomen of the wearer.

The temperature sensitive agent 26 is provided on the rear side in the front-rear direction of the absorbent main body 20 (on the rear side of the longitudinal center line CL).

Therefore, the temperature sensitive agent 26 can be made to easily act on the rear side of the crotch portion of the wearer when the absorbent article 1 is worn. This can provide a warming agent effect to the sacrum of the wearer.

The amount of the temperature sensitive agent 26 applied is larger on the front side in the front-rear direction of the absorbent body 20 than on the rear side in the front-rear direction of the absorbent body 20.

Therefore, when the absorbent article 1 is worn, the temperature sensitive agent 26 can be made to act more easily on the front side than on the rear side of the crotch portion of the wearer. That is, a greater temperature sensation effect can be imparted to the lower abdomen portion than to the sacrum portion of the wearer. The amount of the temperature sensitive agent 26 applied can be confirmed by using the aforementioned sensory test.

The lumbar member 10 has a stretchable member (stretchable sheet 12) that is continuous in the left-right direction at a portion overlapping the temperature sensitive agent 26 applied to the absorbent body 20. Therefore, the absorbent main body 20 in the overlapping portion is formed with longitudinal gathers by the stretchable member.

Fig. 8 is a view showing a state in which longitudinal gathers formed in the absorbent main body 20 are in contact with the skin of the wearer. In the absorbent main body 20, the longitudinal wrinkles are formed such that the peak portions of the longitudinal wrinkles come into contact with the skin of the wearer (contact portions in fig. 8), and the valley portions of the longitudinal wrinkles are away from the skin of the wearer. That is, the longitudinal wrinkles are formed in the absorbent main body 20, so that the distance between the wearer and the temperature sensitive agent 26 is increased, and the amount of leakage of the temperature sensitive agent 26 can be controlled. This enables adjustment of the magnitude of the temperature effect felt by the wearer.

The absorbent article 1 has three-dimensional gathers 50 along the longitudinal direction on both sides in the left-right direction of the absorbent main body 20.

As described above, the three-dimensional gathers 50 stand up toward the skin of the wearer when the absorbent article 1 is worn, and the apex 50S comes into contact with the groin of the wearer. This forms a space surrounded by the crotch portion of the wearer, the absorbent main body 20, and the pair of three-dimensional gathers 50, 50 (leakage preventing wall portions). That is, a closed space is formed in the crotch of the wearer. Therefore, when the temperature sensitive agent 26 provided in the crotch portion of the absorbent main body 20 volatilizes, the temperature sensitive agent 26 remains in the sealed space and is difficult to be discharged to the outside. This makes it possible to easily maintain the effect of the temperature sensitive agent 26 for a long time.

As shown in fig. 7, a part of the stretchable sheet 12 of the lumbar member 10 overlaps the temperature sensitive agent 26 when viewed in the thickness direction (front-back direction), and the overlapping portion is provided on the non-skin side in the thickness direction with respect to the temperature sensitive agent 26.

The stretchable sheet 12 is made of a material through which the temperature sensitive agent 26 is difficult to pass, and therefore, the temperature sensitive agent 26 is prevented from passing through the non-skin side of the waist member 10 at a portion overlapping with the stretchable sheet 12. Therefore, the temperature sensitive agent 26 is less likely to leak to the non-skin side in the thickness direction and be discharged into the atmosphere, and the effect of the temperature sensitive agent 26 can be easily sustained for a long time.

As shown in fig. 7, a part of the aftertreatment belt 60 of the lumbar member 10 overlaps the temperature sensitive agent 26 when viewed in the thickness direction, and the overlapping portion is provided on the non-skin side in the thickness direction with respect to the temperature sensitive agent 26.

The post-treatment tape 60 is difficult to pass the temperature sensitive agent 26 as in the stretchable sheet 12, and therefore, the temperature sensitive agent 26 is prevented from passing through the non-skin side of the waist member 10 at the portion overlapping with the post-treatment tape 60. Therefore, the temperature sensitive agent 26 is less likely to leak to the non-skin side in the thickness direction and be discharged into the atmosphere, and the effect of the temperature sensitive agent 26 can be easily sustained for a long time.

The area of the ultrasonic bonding portion YS per unit area in the absorbent body overlapping region is larger than the area of the ultrasonic bonding portion ZS per unit area in the absorbent body non-overlapping region.

Since the ultrasonic bonding portion is a high-rigidity portion as compared with the peripheral portion thereof, the area of the ultrasonic bonding portion ZS is larger than that of the ultrasonic bonding portion YS, so that the longitudinal gathers of the absorbent main body 20 formed by the stretching action in the left-right direction of the waistline member 10 can be made small. That is, as described above, the amount of leakage of the temperature sensitive agent 26 can be controlled by the longitudinal wrinkles, and thus the magnitude of the temperature effect felt by the wearer can be adjusted.

The skin-side sheet 24 of the absorbent main body 20 is desirably formed of a hydrophilic air-through nonwoven fabric. Since the hot air nonwoven fabric is likely to have a larger bulk (thickness) than other nonwoven fabrics, the time for allowing the temperature sensitive agent 26 to pass through the skin side sheet 24 can be made longer. That is, when the hot air nonwoven fabric is used as the skin side sheet 24, the temperature sensitive agent 26 gradually leaks out of the skin side sheet 24 and reaches the skin of the wearer.

The skin-side sheet 24 of the absorbent main body 20 may be formed of a spunbond nonwoven fabric or SMS (spunbond-meltblown-spunbond) nonwoven fabric having an embossed surface. In the embossed portion, the density of the skin side sheet 24 is higher than the density of the periphery thereof, and the temperature sensitive agent 26 can be made difficult to penetrate therethrough. That is, when a spunbond nonwoven fabric or an SMS nonwoven fabric having an embossed surface is used as the skin side sheet 24, the temperature sensitive agent 26 gradually leaks out of the skin side sheet 24 and reaches the skin of the wearer.

< method for producing absorbent article 1 >

Next, a method for manufacturing the absorbent article 1 will be briefly described. Here, a method of manufacturing the absorbent article 1 mainly including the absorbent main body 20 will be described. Fig. 9 is a flowchart of the respective steps of manufacturing the absorbent main body 20. Fig. 10 is a schematic diagram illustrating a manufacturing apparatus 100 for manufacturing the absorbent article 1.

The manufacturing apparatus 100 shown in fig. 10 continuously manufactures the absorbent main bodies 20 of the absorbent articles 1 by sequentially performing the respective steps (S101 to S106) shown in fig. 9. The manufacturing apparatus 100 includes a conveying mechanism 110, a temperature sensitive agent applying mechanism 120, an adhesive agent applying mechanism 130, a joining mechanism 140, a bending mechanism 150, and a cutting mechanism 160.

First, a conveying step (S101) of conveying various base materials such as the skin side sheet 24 constituting the absorbent main body 20 in a predetermined conveying direction is performed. In the manufacturing apparatus 100, the conveyance direction is a direction along the longitudinal direction of the absorbent main body 20. In the transport step, the skin-side sheet continuous body 24L in a state where the skin-side sheets 24 are continuous in the transport direction (longitudinal direction), the non-skin-side sheet continuous body 25L in a state where the non-skin-side sheets 25 are continuous in the transport direction (longitudinal direction), and the absorbent cores 22 are transported from the upstream side to the downstream side in the transport direction at a predetermined transport speed by the transport mechanism 110. While the respective substrates are being conveyed, the respective steps S102 to S106 are performed to manufacture the absorbent main body 20.

Next, a temperature sensitive agent application step (volatile substance application step) of applying a temperature sensitive agent 26 (volatile substance) to the non-skin side surface of the skin side sheet continuous body 24L conveyed in the conveyance direction is performed (S102). In the temperature sensitive agent application step, the temperature sensitive agent application region 26p is formed by spraying or directly applying the liquid temperature sensitive agent 26 onto the non-skin side surface of the skin-side sheet continuous body 24L from the temperature sensitive agent application mechanism 120 provided at a predetermined position in the transport direction. In addition, when the skin side sheet 24 is composed of two sheets, i.e., the 1 st skin side sheet and the 2 nd skin side sheet provided on the non-skin side of the 1 st skin side sheet, the same operational effects as described above can be obtained by spraying or directly applying the liquid temperature sensitive agent 26 to the skin side of the continuous body of the 2 nd skin side sheet.

Next, an adhesive application step (S103) of applying an adhesive to the non-skin-side surface of the skin-side sheet continuous body 24L conveyed in the conveyance direction is performed. In the adhesive application step, an adhesive such as a Hot Melt Adhesive (HMA) is sprayed or directly applied from an adhesive application mechanism 130 provided on the downstream side of the temperature sensitive adhesive application mechanism 120 to the non-skin side surface of the skin-side sheet continuous body 24L in the transport direction, thereby forming an adhesive region (not shown). Further, if necessary, an adhesive is also applied to the absorbent core 22 and the non-skin side sheet continuous body 25L.

In the manufacturing apparatus 100 of the present embodiment, the temperature sensitive agent application step (S102) is performed, and then the adhesive agent application step (S103) is performed. That is, since the adhesive is applied immediately before the bonding step (S104) described below, it is easy to suppress the occurrence of poor bonding due to drying of the adhesive during conveyance. After the temperature sensitive agent application region 26p on which the temperature sensitive agent 26 is applied is formed, the adhesion region can be formed so as not to overlap with the temperature sensitive agent application region 26 p. This can suppress mixing of the oil components contained in the temperature sensitive agent 26 and the adhesive, and can effectively suppress deterioration of the temperature sensitive agent 26 and the adhesive and difficulty in exhibiting their respective functions.

Next, a bonding step (S104) of bonding the various conveyed substrates in the thickness direction is performed. In the joining step, first, the skin-side surface of the absorbent core 22 and the non-skin-side surface of the skin-side sheet continuous body 24L are superposed so as to face each other, and the both are compressed in the thickness direction by the pressing roller 141 of the joining mechanism 140 and joined. In addition, at this time, the turning part 40 is simultaneously formed by the pressing roller 141. Next, the non-skin side sheet continuous body 25L is joined to the non-skin side of the absorbent core 22, and the three-dimensional gather elastic member 51 is joined to the non-skin side sheet continuous body 25L in a state of being elongated in the conveyance direction (longitudinal direction).

Next, a folding step (S105) of folding a part of the non-skin side sheet continuous body 25L to form the three-dimensional gather 50 is performed. The folding mechanism 150 folds the non-skin side sheet continuous body 25L in the CD direction (width direction) orthogonal to the conveyance direction so as to sandwich the three-dimensional gather elastic member 51 inward at the apex 50S described in fig. 4.

Next, a cutting step (S106) of cutting the continuous body of the base material such as the skin-side sheet continuous body 24L is performed. The cutter roller 161 provided in the cutting mechanism 160 cuts the continuous base material to which the absorbent core 22, the skin-side sheet continuous body 24L, and the like are bonded, by a predetermined length in the conveyance direction. Thereby, each absorbent main body 20 used for the absorbent article 1 is formed.

The cut

absorbent bodies

20 and 20 … are conveyed directly to the downstream side in the conveyance direction, and are joined to be superposed on a continuous body (not shown) of the waist member 10 separately produced. Then, the waistline member 10 is folded in two with the longitudinal center line CL (see fig. 2) as a fold, the joint portions 10fe, 10be are formed, and the absorbent article 1 is cut at a predetermined position.

In the 2 nd embodiment, the following embodiments are also provided

In embodiment 1, the stretchable sheet 12 is provided as a member for stretching the lumbar member 10 in the right-left direction, but the present invention is not limited thereto. For example, the elastic member may be formed by using the elastic sheet 12 in place of the elastic sheet 16 or by using both the elastic sheet 12 and the elastic sheet 16.

Fig. 11 is a plan view of the pants-type absorbent article 200 in an unfolded state using the waistline elastic band 16. In the pants-type absorbent article 200, the amount of contraction in the left-right direction of the waist member 10 when transitioning from the extended state to the natural state is made small in the absorbent-main-body overlapping region (region X shown in fig. 2) when viewed in the front-rear direction (thickness direction).

As an example, the following can be cited: as shown in fig. 11, the waistline elastic 16 and the waistline member 10 are set in a non-bonded state in the absorbent-main-body overlapping region, and the waistline elastic 16 in the absorbent-main-body overlapping region is cut, so that a part of the waistline elastic 16 is set in a non-stretched state. According to this state, the elastic belt 16 is contracted from the cut portion to both ends in the left-right direction of the absorbent-body overlapped region, and therefore, the elastic belt 16 is disposed in a non-extended state in the absorbent-body overlapped region. Therefore, the contraction amount of the hip member 10 in the left-right direction in the absorbent-body overlapping region when shifting from the extended state to the natural state can be made smaller than the contraction amount of the absorbent-body non-overlapping region at the same position in the up-down direction as the absorbent-body overlapping region.

More specifically, as shown in the enlarged view of fig. 11, the dimension in the left-right direction in the extended state is L0, the dimension in the left-right direction in the natural state is L2, the dimension in the left-right direction in the extended state is L0, and the dimension in the left-right direction in the natural state is L1 in the absorbent body overlapping region. Furthermore, L1 is larger than L2.

According to the pants-type absorbent article 200, the L1 is larger than that in the case of the same as the L2, so that the contraction amount of the absorbent main body 20 in the left-right direction in the absorbent main body overlapping region is reduced, and the occurrence of the longitudinal gathers of the absorbent main body 20 is suppressed, whereby the effect of the temperature sensitive agent 26 can be enhanced in the lower abdomen.

Other embodiments are also possible

The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. It is needless to say that the present invention can be modified and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

In the above embodiment, the front stretchable sheet 12f and the rear stretchable sheet 12b are each 1 sheet, but the present invention is not limited thereto. For example, the front stretchable sheet 12f may be divided into a waist front stretchable sheet 12fa and a body front stretchable sheet 12fb, and the rear stretchable sheet 12b may be divided into a waist rear stretchable sheet 12ba and a body rear stretchable sheet 12 bb. Fig. 12 is a plan view of the developed state of the pants-type absorbent article 300 in which the front stretchable sheet 12f and the rear stretchable sheet 12b are separated into two pieces.

In this absorbent article 300, the stretchability of the fastened wearer of the waist portion front side stretchable sheet 12fa and the waist portion rear side stretchable sheet 12ba is greater than the stretchability of the fastened wearer of the main body portion front side stretchable sheet 12fb and the main body portion rear side stretchable sheet 12 bb. In this way, since the absorbent article 300 is firmly attached to the waist of the wearer, the temperature sensitive agent 26 vaporized inside the absorbent article 300 is less likely to leak out from the waistline opening 1a, and discharge of the temperature sensitive agent 26 can be suppressed.

In the above embodiment, the temperature sensitive agent 26 is used as an example of the volatile substance, but the temperature sensitive agent 26 is not limited thereto, and for example, a cold sensitive agent may be used. When the cooling agent is used, the discomfort caused by stuffiness and stickiness of the wearer can be reduced.

That is, with the absorbent article 1 including the cooling agent (temperature sensitive agent 26), the cooling effect (temperature effect) of the wearer can be improved as compared with the case where the volatile substance is other than the cooling agent (temperature sensitive agent 26).

The mechanism (mechanism) by which the aforementioned temperature sensitive agent 26 is vaporized to exert its effect is the same as for the cooling agent and the fragrance described later, and therefore, the description thereof is omitted.

Examples of the psychrophilic agents include menthol (e.g., l-menthol) and derivatives thereof (e.g., menthyl lactate), methyl salicylate, camphor, essential oils derived from plants (e.g., peppermint and eucalyptus), and the like. In addition, the psychrotolerant preferably stimulates a temperature-sensitive TRP channel, as in the case of the warming agent 26.

In the above embodiment, the temperature sensitive agent 26 is used as an example of the volatile substance, but the temperature sensitive agent 26 is not limited thereto, and for example, a perfume may be used. The perfume may be used instead of the temperature sensitive agent 26, or may be used together with the temperature sensitive agent 26. As the perfume, the same perfumes as those conventionally used in the art can be used.

In addition, in the case of a green herbal flavor (green herbal fragrance), in particular, the flavor can safely and easily alleviate particularly psychologically unpleasant symptoms without causing physical irritation to the body and without requiring oral administration. In addition, comfort can be obtained.

Green herbal-type aroma is a note that contains either green (green note) or herbal (herbal note). The green fragrance refers to the fresh fragrance of grass and tender leaves. The herbal aroma (herbaceous note) is a note characterized by the note of medicinal plants in nature using herbaceous plants.

Fragrance compositions containing fragrances with green herb-type fragrance preferably contain a fragrance selected from the group consisting of cis-3-hexenol, cis-3-hexenol formate, cis-3-hexenol acetate, cis-3-hexenol propionate, cis-3-hexenol butyrate, trans-2-hexenal, trans-2-hexenol acetate, hexyl acetate, methylphenylmethyl acetate, 2-methyl-3- (3, 4-methylenedioxyphenyl) -propanal (IFF company name, helional), 3(4) - (5-ethylbicyclo [2,2,1] heptyl-2) -cyclohexanol, allyl 2-pentoxyglycolate (IFF company name, galbanum ester), 4-methyl-3-decen-5-ol (Givaudan company name, methyl decenol), hexanal, 2, 4-dimethyl-3-cyclohexenylformaldehyde (IFF company name, privet aldehyde), and phenylacetaldehyde. Commercially available perfumes can be used. Fragrances containing them produce mainly green fragrances.

The perfume composition containing perfume with green herbaceous fragrance preferably further contains 1 or more than 2 perfumes selected from l-menthol, 1, 8-cineole, methyl salicylate, citronellal, camphor, borneol, isobornyl acetate, terpinyl acetate, eugenol, anethole, 4-methoxybenzyl methanol and artemisinine. Fragrances containing them produce mainly green fragrances.

In addition, in the case of using a perfume, the mechanism (mechanism) of the effect of vaporization is the same as that of the temperature sensitive agent 26, and therefore, the description of the perfume is omitted.

Claims

1. A pants-type absorbent article having a vertical direction and a horizontal direction intersecting each other, comprising:

an absorbent main body including a liquid-absorbent core and a skin side sheet provided on the skin side of the absorbent core; and

a waist member overlapped and joined to a non-skin side of the absorbent main body and stretchable in the left-right direction,

the pants-type absorbent article is characterized in that,

a volatile substance is provided on at least one of a non-skin side surface of the skin side sheet and a skin side surface of the absorbent core.

2. A pant-type absorbent article according to claim 1,

the volatile substance is a temperature sensitive agent or a cold sensitive agent for stimulating a temperature sensitive TRP channel.

3. A pant-type absorbent article according to claim 1 or 2,

the waist member has a first sheet 1 having at least a part of a region laminated on the skin side of the absorbent main body,

having a portion where the 1 st panel and the volatile material overlap when viewed in the front-to-back direction.

4. A pant-type absorbent article according to claim 3,

has a portion where the 1 st panel and the absorbent main body overlap and the 1 st panel and the volatile material do not overlap when viewed in the front-rear direction.

5. A pant-type absorbent article according to claim 4,

the area of the portion where the 1 st sheet and the absorbent body overlap and the 1 st sheet and the volatile material do not overlap when viewed in the front-rear direction is larger than the area of the portion where the 1 st sheet and the volatile material overlap when viewed in the front-rear direction.

6. A pant-type absorbent article according to any one of claims 3 to 5,

the 1 st sheet has a high-density portion in which the density of the 1 st sheet is higher than the density of the periphery thereof,

has a portion where the high-density portion and the volatile material overlap when viewed in the front-rear direction.

7. A pant-type absorbent article according to any one of claims 1 to 6,

at least a part of the volatile material is provided in a region above an upper end of the absorbent core in the vertical direction.

8. A pant-type absorbent article according to any one of claims 1 to 7,

the volatile material is continuously provided in a range from one end portion to the other end portion in the longitudinal direction of the absorbent main body.

9. A pant-type absorbent article according to claim 8,

the pair of volatile materials is provided at both ends in the width direction of the absorbent main body, and the volatile material is not provided at the center in the width direction of the absorbent main body.

10. A pant-type absorbent article according to any one of claims 1-9,

the volatile material is provided at a position on the front side of the center of the absorbent main body in the front-rear direction.

11. A pant-type absorbent article according to claim 10,

the volatile material is provided on a rear side of a center of the absorbent main body in the front-rear direction.

12. A pant-type absorbent article according to claim 11,

the amount of the volatile material provided at a position forward of the center of the absorbent main body in the front-rear direction is larger than the amount of the volatile material provided at a position rearward of the center of the absorbent main body in the front-rear direction.

13. A pant-type absorbent article according to any one of claims 1-12,

when viewed in the front-rear direction, a region where the waist member is stretchable in the left-right direction and a portion where the volatile material overlaps are provided.

14. A pant-type absorbent article according to any one of claims 1-13,

a pair of three-dimensional gathers that can rise toward the skin of the wearer are provided on both sides of the absorbent main body in the left-right direction.

15. A pant-type absorbent article according to any one of claims 1-14,

the waist member has a stretchable film stretchable in the left-right direction,

having a portion where the stretchable membrane and the volatile material overlap when viewed in the front-rear direction,

the stretchable film is disposed on a non-skin side of the volatile material in a thickness direction.

16. A pant-type absorbent article according to any one of claims 1-15,

the waist member has a post-treatment belt for holding the pants-type absorbent article in a rolled state when the pants-type absorbent article after use is discarded,

having a portion where the aftertreatment tape and the volatile material overlap when viewed in the front-to-back direction,

the post-treatment tape is disposed on the non-skin side of the volatile material in the thickness direction.

17. A method for manufacturing a pants-type absorbent article having an absorbent main body and a waist member superposed and joined to a non-skin side of the absorbent main body, the method being characterized in that,

the method comprises the following steps: a conveying step of conveying a skin side sheet disposed at a position closest to a skin side of the absorbent main body, a non-skin side sheet disposed at a position closest to a non-skin side of the absorbent main body, and an absorbent core provided between the skin side sheet and the non-skin side sheet in a predetermined conveying direction, respectively;

a volatile substance application step of applying a volatile substance to a non-skin side surface of the skin side sheet;

an adhesive application step of applying an adhesive to a non-skin-side surface of the skin side sheet; and

and a joining step of laminating and joining the absorbent core to the non-skin-side surface of the skin side sheet.

18. The method of manufacturing a pant-type absorbent article according to claim 17,

the adhesive application step is performed after the volatile substance application step is performed.