CN112741729A

CN112741729A - Pants-type absorbent article

Info

Publication number: CN112741729A
Application number: CN201911045416.4A
Authority: CN
Inventors: 高桥雄二; 史异
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2021-05-04
Also published as: KR20220088849A; WO2021084851A1

Abstract

The pants-type absorbent article of the present invention promotes a temperature-sensitive or cold-sensitive effect and sustains the temperature-sensitive or cold-sensitive effect. A pants-type absorbent article having an absorbent main body (20) and a waist member (10), and a waist opening (1a), characterized in that an elastic member (10gm) extending in the left-right direction is provided at the upper end (UA) of the waist member (10), a temperature sensitive agent (26) is provided at the waist member (10), and the temperature sensitive agent (26) is provided at a position lower than the elastic member (10gm) in the up-down direction.

Description

Pants-type absorbent article

Technical Field

The present invention relates to a pants-type absorbent article.

Background

As a pants-type absorbent article (hereinafter, also simply referred to as an absorbent article) provided with volatile substances for reducing unpleasant feelings 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 perfume on an outer surface or an inner surface of a waist region 10 corresponding to a waist of the wearer.

Documents of the prior art

Patent articleDocument (A)

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

Disclosure of Invention

Problems to be solved by the invention

As an absorbent article provided with another volatile material, an absorbent article that stimulates the temperature sensation of the wearer is known. For example, the absorbent article includes a temperature sensitive agent for alleviating the symptoms of dysmenorrhea and chill of the wearer, and the absorbent article includes a temperature sensitive agent for reducing the unpleasant feeling of the wearer due to stuffiness and stickiness.

In addition, in an absorbent article provided with a temperature sensitive agent or a cooling agent, if the temperature sensitive agent or the cooling agent is provided in the waist region 10 corresponding to the waist of the wearer, there is a problem as follows: the wearer cannot feel a sufficient sensation of warmth or coldness in the lower abdomen, and the vaporized temperature-sensitive agent or coldness-sensitive agent is easily discharged from the waistline opening.

The present invention has been made in view of the above problems, and an object thereof is to promote a temperature-sensitive or cooling-sensitive effect and to maintain the temperature-sensitive or cooling-sensitive effect.

Means for solving the problems

A main aspect of the present invention for achieving the above object is a pants-type absorbent article having an absorbent main body and a waist member which are arranged in a vertical direction, a horizontal direction, and a front-rear direction which intersect each other, and having a waist opening, wherein an elastic member extending in the horizontal direction is provided at an upper end portion of the waist member, a temperature sensitive agent or a cooling agent is provided at the waist member, and the temperature sensitive agent or the cooling agent is provided below the elastic member in the vertical direction.

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

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the temperature-sensitive or cold-sensitive effect can be promoted and sustained.

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 and a schematic sectional view showing the temperature sensitive agent 26 provided in the absorbent article 1.

Fig. 4 is a flowchart showing a method of determining a location to which a temperature sensitive agent 26 is applied.

Fig. 5 is a diagram showing the extended state and the natural state of the pants-type absorbent article 1.

Fig. 6 is a schematic view showing the state of the stretchable sheet 12 and the non-stretchable sheet 14 in the leg hole openings 1 b.

Fig. 7 is a schematic view showing a method of folding the pants-type absorbent article 1.

Fig. 8 is a plan view of the pant-type absorbent article 100 according to embodiment 2.

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 part

10 ff: waist front end portion, 10 b: rear waist member

10 be: rear side joint, 10 bf: waist rear end, 10 et: upper end of

10 gm: opening rubber band (elastic member), 10L: left side extension, 10R: right side extension

12: stretchable sheet (membrane sheet), 12 f: front side stretchable sheet

12 b: rear stretchable sheet, 14: non-stretchable sheet, 14 e: end portion, 15: buffer sheet

15 p: printing area, 16: waist elastic band, 20: absorbent body, 20 et: outer end

20 Le: left end, 20 Re: right side terminal

26: temperature sensitive agent, 26p 1: coating area, 26p 2: coating area, 26p 3: coating area

26 n: non-coated area, 100: pants-type absorbent article

CL: center line, YS: ultrasonic joint, ZS: ultrasonic bonding portion, UA: upper end part

MA: central zone, SA: two side regions, LG: leg gather, BL: fold line

Detailed Description

At least the following matters will be apparent from the description of the present specification and the accompanying drawings.

A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction intersecting with each other, an absorbent main body and a waist member, and having a waist opening, wherein an elastic member extending in the horizontal direction is provided at an upper end portion of the waist member, a temperature sensitive agent or a cooling agent is provided at the waist member, and the temperature sensitive agent or the cooling agent is provided below the elastic member in the vertical direction.

According to such a pants-type absorbent article, the effect of the temperature sensation or the cooling sensation can be promoted and the effect of the temperature sensation or the cooling sensation can be sustained.

In the pants-type absorbent article, it is preferable that the elastic member is an opening elastic band, and the opening elastic band is bonded to the upper end portion of the waist member with an adhesive.

According to such a pants-type absorbent article, since the rubber of the rubber band at the opening is prevented from falling off, the pants-type absorbent article can be prevented from being displaced and falling off.

In the pants-type absorbent article, it is preferable that the waist member includes a plurality of sheets, and the temperature sensitive agent or the cooling agent is provided on a skin-side sheet of the plurality of sheets of the waist member.

According to such a pants-type absorbent article, the temperature-sensitive agent or the cooling-sensitive agent comes close to the skin of the wearer, and therefore the effect of temperature-sensitive or cooling-sensitive can be increased.

In the pants-type absorbent article, it is desirable that the waist member is provided with a printed region on which a pattern is printed, and the printed region is provided above the temperature sensitive agent or the cooling agent in the vertical direction.

According to such a pants-type absorbent article, the print region suppresses the discharge of the vaporized temperature sensitive agent or cooling agent to the upper side of the print region, and therefore the effect of temperature sensing or cooling can be sustained.

In the pants-type absorbent article, it is preferable that the waist member is provided with a printing region on which a pattern is printed, and the printing region is provided below the temperature sensitive agent or the cooling agent in the vertical direction.

According to such a pants-type absorbent article, the print region suppresses the vaporized temperature sensitive agent from moving downward, and the opening rubber band suppresses the vaporized temperature sensitive agent from being discharged to the outside at the upper side, so that the temperature sensitive effect can be improved at the position where the temperature sensitive agent is applied.

In the pants-type absorbent article, it is desirable that the waist member is provided with a printed region on which a pattern is printed, and the printed region and at least a part of the temperature sensitive agent or the cool sensitive agent overlap each other when viewed in the front-back direction.

According to such a pants-type absorbent article, the printed region suppresses the discharge of the vaporized temperature sensitive agent or cold sensitive agent from the skin side to the non-skin side (the airtightness becomes high), and therefore the effect of temperature and cold can be sustained.

In the pants-type absorbent article, it is desirable that the absorbent main body is provided with the temperature sensitive agent or the cooling agent, and the temperature sensitive agent or the cooling agent of the absorbent main body and the temperature sensitive agent or the cooling agent of the waist member have a portion overlapping each other when viewed in the front-rear direction.

According to such a pants-type absorbent article, the temperature-sensitive agent or the cold-sensitive agent at both the waist member and the absorbent main body exhibits the temperature-sensitive or cold-sensitive effect at the center of the lower abdomen, and therefore the temperature-sensitive or cold-sensitive effect can be improved.

In the pants-type absorbent article, it is preferable that the waist member includes a plurality of sheets, at least 1 sheet of the plurality of sheets has stretchability in the left-right direction, the plurality of sheets are joined by a plurality of ultrasonic joining portions which are scattered in a state of being overlapped in the front-rear direction, the waist member has an overlapped region which is overlapped with the absorbent main body and a non-overlapped region which is not overlapped with the absorbent main body when viewed in the front-rear direction, and an area of the ultrasonic joining portion per unit area of the non-overlapped region is smaller than an area of the ultrasonic joining portion per unit area of the overlapped region.

According to such a pants-type absorbent article, the fit is improved, a comfortable wearing feeling is achieved, and the effect of a warm feeling or a cool feeling can be improved.

In the pants-type absorbent article, it is desirable that, in a central region when the pants-type absorbent article in a state of being stretched in the left-right direction is trisected, a total amount of the temperature sensitive agent or the cooling agent in the abdominal portion is larger than a total amount of the temperature sensitive agent or the cooling agent in the back portion of the pants-type absorbent article.

According to such a pants-type absorbent article, a warm feeling or a cool feeling effect can be effectively exhibited on the lower abdomen and the buttocks of the wearer.

In the pants-type absorbent article, it is desirable that the sum of the amounts of the temperature sensitive agent or the cooling agent in the abdominal portion is larger than the sum of the amounts of the temperature sensitive agent or the cooling agent in the back portion of the waist member.

In the pants-type absorbent article, it is desirable that the dimension in the left-right direction of the waist member at the upper end portion is L0 in an extended state in which the waist member is extended in the left-right direction, L1 in a natural state, the dimension in the left-right direction of the waist member in a region below the upper end portion is L0 in the extended state, L2 in the natural state, and L1 is smaller than L2.

According to such a pants-type absorbent article, the vaporized temperature sensitive agent or cooling agent inside the absorbent article is less likely to be discharged from the waist opening to the outside, and the discharge of the temperature sensitive agent or cooling agent can be suppressed, thereby enabling the temperature sensitive or cooling effect to be sustained.

In the pants-type absorbent article, the waist member is preferably provided with at least one of a nonwoven fabric sheet and a film sheet mixed with polyurethane.

According to such a pants-type absorbent article, since the release of the volatile temperature-sensitive agent or cold-sensitive agent from the skin side to the non-skin side is suppressed, the effect of temperature-sensitive or cold-sensitive can be sustained.

The pants-type absorbent article desirably has a central region in which the pants-type absorbent article in the state of being stretched in the left-right direction is trisected and both side regions positioned on both sides of the central region, the temperature sensitive agent or the cooling agent being provided in at least a part of the central region of the waist member, and the total amount of the temperature sensitive agent or the cooling agent provided in the central region is larger than at least one of the total amount of the temperature sensitive agent or the cooling agent provided in the left side region of the both side regions and the total amount of the temperature sensitive agent or the cooling agent provided in the right side region of the both side regions in the abdomen side portion of the pants-type absorbent article.

According to such a pants-type absorbent article, a warm feeling or a cool feeling effect is promoted, and a comfortable wearing feeling can be achieved.

In the pants-type absorbent article, the waist member is preferably provided with a plurality of sheets including at least 1 nonwoven fabric sheet, and the plurality of sheets are joined by a plurality of ultrasonic joining portions which are scattered in a state of being overlapped in the front-rear direction.

According to such a pants-type absorbent article, it is possible to suppress the discharge of the volatilized temperature sensitive agent from the skin side to the non-skin side (to improve airtightness), and to continue the effect of temperature and coldness.

In the pants-type absorbent article, it is preferable that the waist member has a left side extension portion located on the left side of the left side end of the absorbent main body and a right side extension portion located on the right side of the right side end of the absorbent main body, and in a packaged state of the pants-type absorbent article, the left side extension portion is folded to the right side of the left side end of the absorbent main body, and the right side extension portion is folded to the left side of the right side end of the absorbent main body, and in the packaged state, at least a part of the temperature sensitive agent or the cool sensitive agent overlaps at least one of the left side extension portion and the right side extension portion when viewed in the front-rear direction.

According to such a pants-type absorbent article, at least one of the left side extension portion and the right side extension portion serves as a cover, and discharge of the vaporized temperature sensitive agent or cooling agent can be suppressed.

In the pants-type absorbent article, the waist member preferably includes a plurality of sheets, and at least a part of an end portion of a sheet closest to a non-skin side among the plurality of sheets is inclined toward a skin side in a leg hole opening portion of the pants-type absorbent article.

According to such a pants-type absorbent article, the ends of the non-stretchable sheet function as covers for the leg hole openings when worn, and the air-tightness is improved, so that the effect of a warm feeling or a cool feeling can be sustained.

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 (described in detail later) will be described as an example of the 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 in fig. 1 is the vertical direction, the upper side (lower side) is the "upper" ("lower") in the vertical direction, the horizontal direction is the left-right direction, and the left side (right side) is the left (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 developed 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 with each other. The vertical direction in fig. 2 is defined as the longitudinal direction, the upper side (lower side) is defined as the "front (ventral side)" in the longitudinal direction ("rear (dorsal side)"), the direction (lateral direction) perpendicular to the longitudinal direction on the paper surface is defined as the width direction, and the left side (right side) is defined as the left (right) in 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 the plan view are extended without wrinkles by extending each elastic body (for example, a stretchable sheet 12 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 a waistline member 10 and an absorbent main body 20. 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. In the present embodiment, in fig. 2, a range shown by the front waist member 10f (a range from the center line CL to the abdomen side of the front side end (front upper end 10et) of the pants-type absorbent article 1) is the abdomen side portion, and a range shown by the rear waist member 10b (a range from the center line CL to the back side of the rear side end (rear upper end 10et) of the pants-type absorbent article 1) is the back side portion.

The front waist member 10f has a waist front end portion 10ff along the width direction at the front end and front joining portions 10fe (diagonally shaded portions in fig. 2 which are inclined downward to the right) along the longitudinal direction provided at both left and right ends, and the rear waist member 10b has a waist rear end portion 10bf along the width direction at the rear end and rear joining portions 10be (diagonally shaded portions in fig. 2) along the longitudinal direction provided at both left and right ends. The front side joining portion 10fe and the rear side joining portion 10be are joined to form a locking portion when formed into a pants-type.

That is, the lumbar member 10 has engaging portions at both ends in the left-right direction for vertically joining the front lumbar member 10f (front-side joining portion 10fe) and the rear lumbar member 10b (rear-side joining portion 10be) of the lumbar member 10.

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 lumbar member 10 further includes a cushion sheet 15 different from the stretchable sheet 12 and the non-stretchable sheet 14 at a position closest to the skin side of the front lumbar member 10 f. The cushion sheet 15 is provided to alleviate a situation where the outer end 20et on the front side of the absorbent main body 20 is in strong contact with the skin of the wearer.

The non-stretchable sheet 14 is formed of, for example, a through-air nonwoven fabric, a spunbond nonwoven fabric, or the like. The part of the non-stretchable sheet 14 protrudes outward in the longitudinal direction (vertical direction) than the outer end 20et of the absorbent main body 20, and is folded back and joined to the skin side, which is inward in the longitudinal direction and in the thickness direction, at the upper end 10et in the longitudinal direction, and the folded-back portion on the front side (rear side) forms the aforementioned waist front end portion 10ff (waist rear end portion 10bf) at the front end portion (rear end portion).

Further, an opening rubber band 10gm (corresponding to an elastic member) which expands and contracts in the left-right direction is joined by an adhesive to the inside of the folded back portion of each of the waistline front end portion 10ff and the waistline rear end portion 10 bf. That is, an opening rubber band 10gm is provided along the left-right direction at the upper end of the lumbar member 10, and the opening rubber band 10gm is bonded to the upper end of the lumbar member 10 with an adhesive. The "upper end portion" in the present embodiment refers to the uppermost portion (the UA portion shown in fig. 2) when the pants-type absorbent article 1 is divided into four equal parts in the vertical direction, or a portion which is located at about 30mm from the upper end in the vertical direction (a portion which is gripped by a hand to be stretched in the horizontal direction when worn) and in which the stretching force in the horizontal direction (the tightening force to the wearer) is greater than the stretching force in the central portion in the vertical direction of the waist member 10.

In the present embodiment, the opening rubber bands 10gm are provided at the waistline front end portion 10ff and the waistline rear end portion 10bf, but the present invention is not limited thereto, and for example, a stretchable nonwoven fabric, a stretchable film, or the like may be provided as a band-shaped stretchable member.

The stretchable sheet 12 includes a front stretchable sheet 12f provided on the front waist member 10f and a rear stretchable sheet 12b provided on the rear waist member 10 b. The stretchable sheet 12 of the present embodiment is a stretchable film (for example, a member having stretchability formed by melting an elastomer resin such as polyurethane or styrene into a sheet having a uniform thickness, and corresponds to a membrane sheet), and has higher air tightness than a stretchable nonwoven fabric sheet. That is, the stretchable film suppresses the discharge of the volatilized temperature sensitive agent 26 from the skin side to the non-skin side, compared to a member made of a stretchable nonwoven fabric or 2 sheets of non-stretchable nonwoven fabric with a member stretchable in the left-right direction interposed therebetween, and therefore the temperature sensitive effect can be sustained.

In addition, from the viewpoint of airtightness, the stretchable sheet 12 may be disposed at the position closest to the skin, but in the case of using a stretchable film, even if the temperature sensitive agent 26 is directly applied to the stretchable film, the retention of the temperature sensitive agent 26 is poor, and further, when the stretchable film is in contact with the body, the touch to the skin is also poor. Therefore, when the stretch film is used, the structure of the non-stretch nonwoven fabric, the stretch film, and the non-stretch nonwoven fabric is preferably in this order from the non-skin side.

The stretchable sheet 12 of the present embodiment may be a stretchable nonwoven fabric sheet in which polyurethane is mixed instead of the stretchable film (for example, a stretchable nonwoven fabric sheet in which stretchable fibers of a polyurethane elastomer, which is one type of thermoplastic elastomer having elasticity, are mixed). Since the sheet has high air-tightness as compared with a nonwoven fabric sheet not mixed with polyurethane (for example, a nonwoven fabric sheet of 100% polypropylene), the same effect as that of the stretch film (continuation of the temperature-sensitive effect) is obtained. That is, the lumbar member 10 includes at least one of a nonwoven fabric sheet and an elastic film mixed with polyurethane.

The cushion sheet 15 is formed of, for example, a hot air nonwoven fabric, a spunbond nonwoven fabric, an SMS nonwoven fabric, or the like, and is provided along the left-right direction so as to be closest to the skin side in the thickness direction and to overlap the outer end 20et on the front side of the absorbent main body 20.

Further, the cushion sheet 15 is provided with a printing region 15p on which a pattern (a pattern having a different appearance from the surrounding such as characters, symbols, images, and colors) is printed in the left-right direction. That is, the front waistline member 10f is provided with a printing region 15p on which a pattern is printed. Further, the printed region 15p is subjected to a foundation treatment so that problems such as pattern bleeding do not occur (printing is easy) at the time of printing, and airtightness from the skin side toward the non-skin side is improved as compared with a portion not subjected to the foundation treatment.

Further, the cushion sheet 15 is coated with a temperature sensitive agent 26. When the temperature sensitive agent 26 is applied to the skin side, the printed region 15p is provided on the non-skin side. Since the printed area 15p may be dissolved by the volatile substance of the temperature sensitive agent 26, the dissolved substance can be prevented from adhering to the body by setting the positional relationship. In addition, the temperature sensitive agent 26 will be described later.

Further, the non-stretchable sheet 14 may be folded back in an extended manner without providing the cushion sheet 15. That is, as in the case of the folding back of the non-stretchable sheet 14 shown in fig. 2, the folding back may be performed such that the folding back of the front side is overlapped with the skin side of the absorbent main body 20 to form a folded back portion, thereby alleviating the outer end 20et of the front side of the absorbent main body 20 from being in strong contact with the skin of the wearer. In this case, the same effect as that of the above-described cushion sheet 15 can be obtained by providing the printed region 15p and the temperature sensitive agent 26 in the folded portion.

The stretchable sheet 12 and the non-stretchable sheet 14 are bonded in a state of being overlapped in the thickness direction by forming a plurality of ultrasonic bonding portions in a scattered manner by ultrasonic bonding (ultrasonic sealing) in which ultrasonic vibration and pressure are applied. That is, the waistline member 10 includes a plurality of sheets including at least 1 nonwoven fabric sheet (non-stretchable sheet 14), and the plurality of sheets are joined by a plurality of ultrasonic joining portions which are scattered in a state of being overlapped in the thickness direction (front-rear direction).

Further, since the ultrasonic bonding portion of the non-stretchable sheet 14 is melted to form a film, the release of the volatilized temperature sensitive agent 26 from the skin side to the non-skin side can be suppressed (airtightness is improved) and the temperature sensitive effect can be sustained as compared with the non-stretchable sheet 14 in a state without the ultrasonic bonding portion. The ultrasonic bonding portions of the present embodiment are not all formed as the same ultrasonic bonding portion, but are formed as an ultrasonic bonding portion YS shown in an enlarged view of a portion Y of fig. 2 and an ultrasonic bonding portion ZS shown in an enlarged view of a portion Z of fig. 2, which will be described in detail later.

The cushion sheet 15 is bonded with an adhesive, unlike the stretchable sheet 12 and the non-stretchable sheet 14. That is, the cushion sheet 15 is joined to the sheet (the stretchable sheet 12) on the side closest to the skin among the plurality of sheets (the stretchable sheet 12 and the non-stretchable sheet 14) with an adhesive.

The area to which the adhesive is applied is the center portion in the vertical direction of the non-skin side of the cushion sheet 15, and is larger than the area of the ultrasonic bonding portions YS and ZS per unit area. That is, the area of the cushion sheet 15 coated with the adhesive per unit area is larger than the areas of the ultrasonic bonding portions YS and ZS per unit area of the plurality of sheets (the stretchable sheet 12 and the non-stretchable sheet 14) when viewed in the front-rear direction.

Since the adhesive of the cushion sheet 15 is cured to form a layer having high air tightness, by making the application area of the adhesive larger than the area of the ultrasonic bonding portions YS and ZS, it is possible to suppress the volatile temperature sensitive agent 26 from being discharged from the skin side to the non-skin side, compared to the case where the application area of the adhesive is smaller than the area of the ultrasonic bonding portions YS and ZS, and to continue the temperature sensitive effect. Further, since the ultrasonic bonding portions YS and ZS are melted to form a film shape having low stretchability, the stretchability of the waistcoat member 10 can be increased and the fit can be improved, and a comfortable wearing feeling can be achieved, as compared to the case where the area of the ultrasonic bonding portions YS and ZS is larger than the application area of the adhesive, by making the area of the ultrasonic bonding portions YS and ZS smaller than the application area of the adhesive.

Since the stretchable sheet 12 stretches but the non-stretchable sheet 14 does not stretch, a regular convex wrinkle having a cavity inside is formed on the non-skin side surface of the non-stretchable sheet 14. Here, in the case where the stretchable sheet 12 is a stretchable nonwoven fabric (a member having air permeability), the vaporized temperature sensitive agent 26 is held in the cavity portion inside the aforementioned gathers by the stretchable nonwoven fabric. In this way, for example, when the cavity portion inside the wrinkle becomes smaller with the movement of the body, a part of the vaporized temperature sensitive agent 26 held in the cavity portion moves to the inside through the stretch nonwoven fabric. That is, since the vaporized temperature sensitive agent 26 moves to the skin side, the temperature sensitive agent 26 can be more easily sensed.

The absorbent main body 20 is a sanitary absorbent article, such as a sanitary napkin. The absorbent body 20 of the present embodiment is substantially rectangular in plan view, with the longitudinal direction in the unfolded and extended state (i.e., the longitudinal direction of the absorbent body 20) along the vertical direction of the absorbent article 1.

The absorbent main body 20 has an absorbent core (an absorbent core containing a liquid absorbent material (for example, a liquid absorbent fiber such as pulp fiber containing a super absorbent polymer (so-called SAP) or the like) formed into a predetermined shape along the longitudinal direction (vertical direction) at substantially the center in the horizontal direction, and a liquid absorbing portion). The absorbent core is formed by covering a skin side sheet, which is a liquid-permeable sheet member, and a non-skin side sheet, which includes a liquid-impermeable sheet member for suppressing leakage of excreted liquid to the outside. The absorbent main body 20 is disposed at the position shown in fig. 2 and joined to the waistline member 10.

Further, a temperature sensitive agent 26 is applied to the skin side of the absorbent body 20. The temperature sensitive agent 26 will be described later.

Next, a process of producing the absorbent article 1 in a pants-type from the unfolded state will be described. In the process of producing the absorbent article 1 in the form of a pants, first, the respective members are arranged and joined as described above, and the absorbent article 1 in the unfolded state shown in fig. 2 is produced.

Then, the absorbent article 1 in the unfolded state is folded in the longitudinal direction. That is, the absorbent article 1 is folded in the longitudinal direction so that the skin side of the front waist member 10f and the skin side of the rear waist member 10b face each other with the longitudinal center line CL shown in fig. 2 as a fold line.

Thereafter, since the front joining section 10fe and the rear joining section 10be of the lumbar member 10 are close to each other, the left and right front joining sections 10fe and the rear joining section 10be are joined to each other, respectively, to form the engagement sections.

When the locking portion is formed, since both right and left end portions of the waistline member 10 are joined in the longitudinal direction, the waistline front end portion 10ff and the waistline rear end portion 10bf of the waistline member 10 form a waistline opening portion 1a (a portion having a waistline opening) on the upper side of the waistline member 10. That is, the waistline opening 1a is provided at the upper end of the waistline member 10, and the waistline opening 1a (the waistline front end 10ff and the waistline rear end 10bf) is provided with the opening rubber band 10 gm. Therefore, the waistline opening 1a is stretchable in the right-left direction.

The pants-type absorbent article 1 has a structure in which: the lumbar member 10 abuts against the front side (abdomen) and the rear side (back) of the wearer's body (abuts against the wearer's waist), and does not fall (does not shift and fall) when worn by the stretching of the lumbar member 10 in the left-right direction (the stretching by the opening rubber band 10gm and the stretchable sheet 12). 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 where the absorbent body 20 is in contact with the skin of the wearer when worn, a portion reaching the sacral portion of the buttocks (buttocks) from the lower abdominal portion via the crotch portion).

Further, "contact" means contact, and as long as at least a part of a member is in contact with a wearer, the member is in a state of contact with the wearer. For example, the state in which the stretchable part and the non-stretchable part of the lumbar member 10 are in contact with the wearer and the wearer is not in contact with the wearer is the state in which the lumbar member 10 is in contact with the wearer.

In the above, ultrasonic bonding or an adhesive is used as a bonding method, but the method is not limited to this, and for example, heat sealing, a combination of known bonding, or the like may be used.

< temperature-sensitive agent 26>

Next, the temperature sensitive agent 26 will be described. The temperature sensitive agent 26 is provided for alleviating the symptoms of dysmenorrhea or chill of the wearer, and includes a temperature sensitive stimulant which gives a stimulus to the temperature of the wearer to warm the wearer, and the temperature sensitive stimulant is mixed with a volatile solvent (or the temperature sensitive stimulant is volatile). In the present embodiment, the temperature sensitive agent 26 is provided on the lumbar member 10 and the absorbent main body 20.

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 thermal stimulant of the present embodiment is a substance that activates TRPV1, which is one of temperature-sensitive TRP channels, by stimulating it, and is capsaicin or vanillyl alcohol butyl ether. That is, the TRPV1 of the wearer is activated to induce fever of the wearer (the wearer generates heat in the body) via the recurrent nervous system.

In other words, the wearer is not warmed by itself at a high temperature as in a disposable warmer for carrying, but is warmed without itself at a high temperature as in capsaicin or the like. Therefore, the wearer can feel cool and warm without being burnt or burned by low temperature.

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. In addition, when the temperature stimulant is a volatile substance, a solvent is not necessarily required, and only the temperature stimulant may be used.

Examples of the lipophilic solvent include oils and fats, such as natural oils (e.g., fatty acid esters such as triglycerides, coconut oil, linseed oil, and tri (caprylic/capric) glyceride), hydrocarbons (e.g., paraffins, e.g., 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.

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.

< specific configuration of temperature sensitive agent 26>

Next, a specific arrangement (installation position) of the temperature sensitive agent 26 of the absorbent article 1 will be described. Fig. 3 is a plan view and a schematic sectional view showing the temperature sensitive agent 26 provided in the absorbent article 1. As shown in fig. 3, the pant-type absorbent article 1 has a center region MA in which the pant-type absorbent article 1 in a state of being stretched in the left-right direction is trisected, and both side regions SA located on both sides of the center region MA.

The temperature sensitive agent 26 is applied to the waist member 10 and the absorbent main body 20, and has a predetermined application area on any member.

The application region 26p1 (diagonally shaded portion inclined upward to the right in fig. 3) of the waistline member 10 is a substantially rectangular region having a predetermined dimension in the vertical direction and extending in the horizontal direction, and is provided on the skin side of the cushion sheet 15.

The application region 26p1 is provided below the opening rubber band 10gm in the vertical direction. Therefore, the temperature sensing effect can be promoted and continued.

For example, when the temperature sensitive agent 26 is provided in the waist region 10 corresponding to the waist of the wearer, as in the pants-type disposable diaper 1 described in patent document 1, the wearer cannot feel a sufficient temperature feeling in the lower abdomen, and the vaporized temperature sensitive agent 26 is easily discharged from the waist opening 1 a.

Further, the elastic member (opening rubber band 10gm) of the waist region 10 (upper end portion in the present embodiment) in patent document 1 is most strongly stretchable in the left-right direction (fastening force to the wearer) in the absorbent article 1, and therefore, this portion is most closely attached to the body of the wearer. Further, if the temperature sensitive agent 26 is provided in a portion that is tightly attached for a long time, the temperature sensitive agent 26 is excessively pressed, and itching or the like may occur. Therefore, the temperature sensitive agent 26 is preferably disposed below this portion.

In contrast, in the above embodiment, the temperature sensitive agent 26 is provided below the opening rubber band 10gm provided at the upper end portion of the absorbent article 1 in the vertical direction.

Therefore, the temperature-sensitive effect of the lower abdomen part with a large amount of subcutaneous fat is promoted, and the temperature-sensitive agent 26 that has been gasified is less likely to be discharged from the waistline opening 1a, so that the temperature-sensitive effect can be sustained.

As described above, the opening rubber band 10gm is joined to the upper end of the lumbar member 20 with an adhesive.

That is, since the temperature sensitive agent 26 is provided below the opening rubber band 10gm, the adhesive of the opening rubber band 10gm is less likely to be melted by the temperature sensitive agent 26, and the rubber of the opening rubber band 10gm is prevented from falling off, so that the pants-type absorbent article 1 can be prevented from being displaced and falling off.

The application region 26p1 is provided below the printing region 15p of the cushion sheet 15 in the vertical direction. That is, the print region 15p is provided above the temperature sensitive agent 26 in the vertical direction. Therefore, the print region 15p suppresses the discharge of the vaporized temperature sensitive agent 26 to a position above the print region 15p, and thus the temperature sensitive effect can be maintained.

The application region 26p1 in the present embodiment is not provided on the rear waist member 10b (back side) but is located on the front waist member 10f (ventral side). However, the application region 26p1 is provided so that the amount of the temperature sensitive agent 26 on the ventral side is larger than the amount of the temperature sensitive agent 26 on the dorsal side. That is, in the central region MA in which the pants-type absorbent article 1 in a state of being stretched in the left-right direction is trisected, the temperature sensitive agents 26 are provided so that the total amount of the temperature sensitive agents 26 in the abdomen side portion of the pants-type absorbent article 1 (the waist member 10) is larger than the total amount of the temperature sensitive agents 26 in the back side portion.

In this way, the central area MA of the rear waist member 10b easily receives the body weight in the lying posture and easily exhibits the temperature effect, so that the wearer easily feels the temperature effect, and the central area MA of the front waist member 10f contains a large amount of the temperature sensitive agent 26, so that the wearer easily feels the temperature effect. That is, the temperature sensing effect can be effectively exhibited at the lower abdomen and buttocks of the wearer.

The coated region 26p1 is provided in the center region MA in the left-right direction, and the non-coated regions 26n in which the temperature sensitive agent 26 is not coated are provided from the outer ends in the left-right direction in the both side regions SA located on both sides of the center region MA.

That is, the temperature sensitive agents 26 are provided in at least a part of the central region MA, and in the front waistline member 10f, the total amount of the temperature sensitive agents 26 provided in the central region MA is larger than at least one of the total amount of the temperature sensitive agents 26 provided in the regions on the left side of the side regions SA and the total amount of the temperature sensitive agents 26 provided in the regions on the right side of the side regions SA.

Accordingly, the temperature-sensitive agent 26 effectively acts on the lower abdomen (center of lower abdomen) where much subcutaneous fat is present to promote the comfort of the wearer because the temperature-sensitive effect is large in the center of the abdomen, and the temperature-sensitive effect is small in both ends of the abdomen, thereby suppressing the itching of the lumbar bones and the like where subcutaneous fat is present is small. That is, the temperature effect acts on an appropriate portion of the wearer, and therefore the temperature effect is promoted, and a comfortable wearing feeling can be achieved.

The temperature sensitive agent 26 is provided on the cushion sheet 15 among the plurality of sheets of the lumbar member 10. That is, the temperature sensitive agent 26 is provided on the skin-side sheet of the plurality of sheets of the lumbar member 10.

That is, the temperature sensitive agent 26 is close to the skin of the wearer, and therefore the temperature sensitive effect can be increased.

The application regions 26p2 (diagonally shaded portions sloping downward to the right in fig. 3) of the absorbent main body 20 have a predetermined dimension in the width direction (short-side direction) of the absorbent main body 20, and are applied as a pair of application regions 26p2 that continue along the longitudinal direction from the front end to the rear end in the longitudinal direction of the absorbent main body 20.

In this case, as described above, the application region 26p1 overlaps the outer end 20et on the front side of the absorbent main body 20, and therefore the application region 26p1 and the application region 26p2 overlap when viewed in the thickness direction (the application region 26p3 in fig. 3). That is, the temperature sensitive agent 26 of the absorbent main body 20 and the temperature sensitive agent 26 of the lumbar member 10 have overlapping portions when viewed in the front-rear direction.

That is, the temperature sensitive agent 26 exerts the temperature sensitive effect at both the waistline member 10 and the absorbent main body 20 in the center of the lower abdomen, and therefore the temperature sensitive effect can be improved.

< method for determining coating Member and coating position for temperature sensitive agent 26>

Next, a method of determining the member and position coated with the temperature sensitive agent 26 will be described using fig. 4. In the present embodiment, the determination is performed by sensory examination. Fig. 4 is a flowchart showing a method of determining a location to which a temperature sensitive agent 26 is applied.

Although the description has been given of the case where the waistline member 10 of the present embodiment has a plurality of sheet members (the stretchable sheet 12, the non-stretchable sheet 14, and the cushion sheet 15), when a plurality of sheet members are laminated in this manner, it is possible to determine which position of which sheet member the temperature sensitive agent 26 is applied to, for example, as follows.

First, the waistline member 10 is divided in the developed state, and the waistline member 10 is cut out for each division (step S1). For example, the waistline member 10 in the unfolded state is cut into ten equal parts in the longitudinal direction and the width direction.

Next, a plurality of divided waistline members 10 are cut into a predetermined size. For example, 4 pieces of the member divided into 2 nd from the front end in the longitudinal direction and 5 th from the left end in the width direction are cut out in the same size of about 3cm × 3 cm.

Then, the cut laminated sheet member 1 is peeled 1 by, for example, cold spraying to produce sample sheets (the separated stretchable sheet 12, non-stretchable sheet 14, and cushion sheet 15) (step S2). For example, 1 sheet of 4 cut laminated sheets was peeled off 1 sheet by 1 sheet, and 4 × 3 layers were prepared as 12 sample sheets.

Next, a PE sheet (polyethylene sheet, for example, as long as it is a sheet having high air-tightness) having the same size as the sample sheet is prepared for each amount of the sample sheet (step S3). For example, 12 PE sheets of about 3 cm. times.3 cm are prepared.

Subsequently, the PE sheet was superimposed on the 1 st sample sheet, and the 1 st sample sheet was brought into contact with the inside of both arms of the examiner in the sensory test (step S4). For example, 1 sample sheet (e.g., the buffer sheet 15) out of 12 sheets was overlapped with the PE sheet and contacted to the inner sides of both arms of the examiner of the sensory examination.

Thus, the examiner measures and records the time T1 until the effect of temperature sensation of the temperature-sensitive agent 26 of the 1 st sample sheet is felt (step S5).

Then, the sensory test was performed on all the sample pieces (S4, S5). That is, the PE sheets were superposed on the 2 nd, 3 rd, … th and 12 th sample sheets, respectively, and a sensory test was conducted, and the times T2 to T12 were measured and recorded for all the sample sheets (step S6).

In this way, the above-described sensory test (S2 to S6) was performed in all the divided sections, and the time T for all the sample pieces was measured and recorded (step S7). For example, a sensory test was performed on 12 sample sheets (the number of the sample sheets was decreased in the section without the cushion sheet 15 or the like) in each of the sections (except the section without the waist member 10 such as the leg hole opening 1 b) of 10 × 10 — 100, and the time T was measured and recorded.

Then, by comparing the time T of the respective sample pieces, the sample piece coated with the temperature-sensitive agent 26 can be determined (step S8). For example, if the sample sheet whose position in the longitudinal direction (vertical direction) is the rear side (lower side) of the print area 15p and whose position in the width direction (horizontal direction) is the center and the sample sheet whose time T is the shortest among the disassembled stretchable sheet 12, non-stretchable sheet 14, and buffer sheet 15 is the buffer sheet 15, it can be determined that the temperature sensitive agent 26 is coated on the central area MA on the lower side of the print area 15p as in the present embodiment.

The determination of the sample piece is not limited to the sensory test, and for example, a headspace solid phase microextraction method can be used. Specifically, the measurement was performed by an electron impact ionization method using a gas chromatography-mass spectrometer (GCMS-QP 2010Plus manufactured by shimadzu corporation) and helium as a carrier gas in a scanning mode. In this method, each sample piece is folded to be a small lump and placed in a beaker. The upper part of the beaker was covered with aluminum foil, and then covered with a plastic paraffin film from the upper part thereof, and the beaker in the sealed beaker was placed in a 37-degree constant-temperature water bath. SPME fibers (Sigma-Aldrich 50/39 μm DVB/CAR/PDMS, Stableflex2cm) were inserted through aluminum foil into the beaker to extract the aroma components from each sample piece. Immediately thereafter, the SPME fibers removed from the beaker were measured with a gas chromatography-mass spectrometer. The values obtained by dividing the masses thus obtained by the area of the sample piece were calculated. By comparing the divided values, the sample piece coated with the temperature sensitive agent 26 can be determined.

< difference in expansion/contraction force and Effect thereof >

Hereinafter, the difference in the stretching force in the left-right direction of the pants-type absorbent article 1 due to handling, members, and the like at the time of producing the pants-type absorbent article 1 and the effect thereof will be described. First, the difference in the expansion and contraction force and the effect thereof due to the difference in the area of the ultrasonic bonding portion per unit area will be described.

As described above, the stretchable sheet 12 and the non-stretchable sheet 14 are bonded together by ultrasonic bonding in which ultrasonic vibration and pressure are applied in a state of being overlapped in the thickness direction. That is, the lumbar member 10 includes a plurality of sheets, at least 1 of the plurality of sheets (stretchable sheet 12) has stretchability in the left-right direction, and the plurality of sheets are joined by a plurality of ultrasonic joining portions which are scattered in a state of being overlapped in the thickness direction (front-back direction).

In other words, the joining of the plurality of sheets is not constituted by the ultrasonic joining portions in the entire joining range of the sheets, but is constituted by the scattered ultrasonic joining portions and the non-ultrasonic joining portions. The ultrasonic bonding portions are provided at regular intervals, and the regular intervals are different depending on whether or not the ultrasonic bonding portions overlap with the absorbent main body 20 when viewed in the thickness direction.

That is, the lumbar member 10 of the present embodiment has an overlapping region (region of a diagonally upward right slope indicated by X in fig. 2) overlapping the absorbent main body 20 when the stretchable sheet 12 is viewed in the thickness direction (front-rear direction) and a non-overlapping region (region of the stretchable sheet 12 excluding the diagonally upward right slope indicated by X) not overlapping the absorbent main body 20, and the intervals of the ultrasonic bonding portions are different between the overlapping region and the non-overlapping region.

In the 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 the ultrasonic bonding portions inclined at 45 degrees with respect to the width direction and the ultrasonic bonding portions inclined at-45 degrees are regularly and substantially uniformly arranged. In the non-overlapping region, as shown in the enlarged view of the portion Z 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 area of the ultrasonic joining portion per unit area of the overlapping region and the non-overlapping region is compared, the non-overlapping region is small. That is, the area of the ultrasonic bonding portion ZS per unit area in the non-overlapping region is smaller than the area of the ultrasonic bonding portion YS per unit area in the overlapping region.

Further, the ultrasonic bonding portion melts to form a film having low stretchability, and therefore affects the stretching force. That is, the smaller the area of the ultrasonic bonding portion per unit area is, the larger the stretching force is. Therefore, the stretchable force in the non-overlapped region is larger than the stretchable force in the overlapped region, and the space between the waistline member 10 and the skin is reduced in the non-overlapped region, so that the fit is improved and comfortable wearing feeling is achieved, and the stretchable force is suppressed in the lower abdomen central portion (overlapped region), so that the space between the waistline member and the skin is increased, the temperature sensitive agent 26 is easily accumulated, and the temperature sensitive effect can be improved.

Next, the difference in the stretching force between the opening rubber band 10gm and the stretchable sheet 12 and the effect thereof will be described with reference to fig. 5. Fig. 5 is a diagram showing the extended state and the natural state of the pants-type absorbent article 1, the left diagram showing the extended state and the right diagram showing the natural state.

In the present embodiment, the stretching force of the opening rubber band 10gm is larger than the stretching force of the stretchable sheet 12. That is, the dimension of the lumbar member 10 in the left-right direction at the upper end portion (the placement portion of the opening rubber band 10gm) is L0 in the extended state in which the lumbar member 10 is extended in the left-right direction, L1 in the natural state, and the dimension of the lumbar member 10 in the left-right direction in the region below the upper end portion (the placement portion of the opening rubber band 10gm) is L0 in the extended state, L2 in the natural state, and L1 is smaller than L2.

In this way, in the lumbar member 10, the upper end portion (the portion where the opening rubber band 10gm is provided) has the largest stretching force, and therefore the lumbar member 10 is firmly attached to the waist of the wearer. That is, the temperature sensitive agent 26 vaporized inside the absorbent article 1 is less likely to be discharged from the waistline opening 1a to the outside, and the discharge of the temperature sensitive agent 26 can be suppressed, so that the temperature sensitive effect can be sustained.

Next, the difference in stretching force between the non-stretchable sheet 14 and the stretchable sheet 12 and the effect thereof will be described with reference to fig. 6. Fig. 6 is a schematic view of fig. 5, as viewed from a-a, showing the stretchable sheet 12 and the non-stretchable sheet 14 in the leg hole opening 1 b.

In the leg hole openings 1b, the non-stretchable sheet 14 is pulled by the stretchable sheet 12, and the end portions 14e are curled so as to be rolled toward the skin side. That is, at least a part of the end portion 14e of the most non-skin side sheet (non-stretchable sheet 14) of the plurality of sheets is inclined toward the skin side at the leg hole openings 1b of the pants-type absorbent article 1.

Therefore, the end portion 14e of the non-stretchable sheet 14 functions as a cover for the leg hole opening 1b during wearing, and the air tightness is improved, so that the temperature effect can be maintained.

< packaging of absorbent article 1 >

The absorbent article 1 of the present embodiment is folded after being formed into a pants-type shape, and 1 absorbent article 1 is put into 1 packaging container and packaged. That is, the absorbent article 1 is individually packaged, and is folded in a packaged state.

Hereinafter, a method of folding the absorbent article 1 at the time of packaging will be described with reference to fig. 7. Fig. 7 is a schematic view showing a method of folding the pants-type absorbent article 1, the left side showing a state before folding the absorbent article 1, the center showing a state of folding the left side extension 10L and the right side extension 10R, and the right side showing a state of folding the absorbent article 1 in the vertical direction at the folding line BL.

As shown in the left side view of fig. 7, the absorbent article 1 of the present embodiment includes a left side extension 10L located on the left side of the left side end 20Le of the absorbent main body 20, and a right side extension 10R located on the right side of the right side end 20Re of the absorbent main body 20. First, as shown in the center view of fig. 7, the left projecting portion 10L is folded to the right of the left end 20Le of the absorbent main body 20, and the right projecting portion 10R is folded to the left of the right end 20Re of the absorbent main body 20. Next, as shown in the right drawing of fig. 7, the absorbent article 1 is folded in the vertical direction along the folding line BL, and packaged in this state.

In this way, in the packaged state of the absorbent article 1, the left side extension portion 10L and the right side extension portion 10R are packaged in a state of overlapping the temperature sensitive agent 26 (application regions 26p1, 26p2) in the front-rear direction. That is, in the packaged state, at least a part of the temperature sensitive agent 26 overlaps at least one of the left side extension portion 10L and the right side extension portion 10R as viewed in the front-rear direction.

Therefore, in the packaged state, the vaporized thermal sensitive agent 26 can be suppressed from being discharged in the front-back direction (from the skin side to the non-skin side).

In fig. 7, the absorbent article 1 is folded in the vertical direction along the folding line BL after the left side extension 10L is folded to the right side and then the right side extension 10R is folded to the left side, but the present invention is not limited to this order, and for example, the right side extension 10R may be folded first. The folding direction is all folded so that the abdomen side (front side) faces each other, but the folding direction is not limited to this, and for example, the folding direction may be folded in the vertical direction along the folding line BL so that the back side (rear side) of the absorbent article 1 faces each other.

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 belt 16 instead of the elastic sheet 12, or by using both the elastic belt 16 and the elastic sheet 12.

Fig. 8 is a plan view of the pants-type absorbent article 100 according to embodiment 2 in an unfolded state, the pants-type absorbent article 100 using a waist elastic band 16 instead of the stretchable sheet 12. The pant-type absorbent article 100 according to embodiment 2 is provided with leg gathers LG. The waist elastic band 16 and the leg gathers LG are fixed with an adhesive in a state sandwiched between the non-stretchable sheet 14 and the non-stretchable sheet 14a from the skin side and the non-skin side.

The adhesive of the cushion sheet 15 according to embodiment 2 is located below the opening rubber band 10gm and above the leg gathers LG in the vertical direction. That is, the adhesive of the opening rubber band 10gm and the leg gather LG is less likely to be dissolved by the adhesive of the cushion sheet 15, and the occurrence of rubber falling off of the opening rubber band 10gm and the leg gather LG is suppressed. That is, the opening rubber band 10gm and the leg gathers LG firmly bring the pant-type absorbent article 100 into close contact with the wearer, and therefore, displacement and falling off of the pant-type absorbent article 100 can be suppressed.

In the pants-type absorbent article 100, as shown in fig. 8, the waistband elastic 16 and the waistband member 10 are in a non-bonded state in the overlapping region (region X shown in fig. 2), and the waistband elastic 16 in the overlapping region is cut off, thereby partially putting the waistband elastic 16 in a non-stretched state.

According to this state, the under belt 16 is contracted from the cut portion to both ends in the left-right direction of the overlapping region, and therefore, in the overlapping region, the under belt 16 is disposed in a non-extended state. On the other hand, in the non-overlapping region, the under elastic band 16 is disposed in an extended state and joined.

That is, the difference in the expansion and contraction forces between the overlapping region and the non-overlapping region as described in embodiment 1 occurs, and the effect of the difference can be obtained.

That is, by increasing the stretching force in the non-overlapping region of the lumbar member 10, the space between the lumbar member 10 and the skin can be made small, the fit can be improved, and the comfortable wearing feeling can be achieved, and by decreasing the stretching force in the overlapping region, the space between the abdominal center portion (the center of the lower abdomen) and the skin can be made large, the temperature sensitive agent 26 can be easily accumulated, and the temperature sensitive effect can be improved.

In the present embodiment, the elastic force of the belt 16 is smaller than the elastic force of the opening rubber band 10gm (i.e., the elastic member is deformed as shown in fig. 5). Therefore, the same effect as the difference in the stretching force between the opening rubber band 10gm and the stretchable sheet 12 described in embodiment 1 is obtained.

That is, in the waistline member 10, since the stretching force of the waistline opening 1a is maximized, the vaporized temperature sensitive agent 26 can be suppressed from being discharged from the waistline opening 1a (airtightness is increased), and the temperature sensitive effect can be continued.

Other embodiments are also possible

The above-described embodiments are provided to facilitate understanding of the present invention, and are not intended to be restrictive. It goes without saying that the present invention can be changed or modified without departing from the gist thereof, and equivalents thereof are included in the present invention.

In the above embodiment, the print region 15p is provided above the temperature sensitive agent 26 in the vertical direction, but the present invention is not limited thereto. For example, the print region 15p may be provided below the temperature sensitive agent 26 in the vertical direction, or the print region 15p and at least a part of the temperature sensitive agent 26 may overlap each other when viewed in the front-rear direction.

In the absorbent article in which the print region 15p is provided below the temperature sensitive agent 26, the print region 15p suppresses the vaporized temperature sensitive agent 26 from moving downward, and the opening rubber band 10gm on the upper side suppresses the vaporized temperature sensitive agent 26 from being discharged to the outside, and therefore, the temperature sensitive effect can be improved at the position where the temperature sensitive agent 26 is applied. That is, by applying the temperature sensitive agent 26 to a place of the absorbent article corresponding to a place where the wearer wants to heat, the temperature sensitive effect can be improved.

In the absorbent article in which the print region 15p and at least a part of the temperature sensitive agent 26 are overlapped, the print region 15p suppresses the gasified temperature sensitive agent 26 from being discharged from the skin side to the non-skin side (air tightness is increased), and therefore the temperature sensitive effect can be continued. In addition, the position of the temperature sensitive agent 26 can be indicated in the print region 15 p.

In the above embodiment, the application region 26p1 is provided so as to overlap the front outer end 20et of the absorbent main body 20 when viewed in the thickness direction, but is not limited to this, and may be provided at a position further forward than the front outer end 20et of the absorbent main body 20, for example.

With this absorbent article, the temperature sensitive agent 26 applied to the absorbent main body 20 and the temperature sensitive agent 26 applied to the waistline member 10 do not overlap in the thickness direction, and therefore the region to which the temperature sensitive agent 26 is applied becomes large, and the temperature sensitive effect can be exhibited in a wider range.

In the above embodiment, the pants-type absorbent article 1 is not displaced and detached from the wearer by the member of the waist member 10 that stretches and contracts in the left-right direction, but the present invention is not limited to this. For example, the following configuration may be adopted: the absorbent article further includes a fastening tape, and the waist member is fixed by the fastening tape, so that the absorbent article is less likely to shift and fall off from the wearer.

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

Examples of the psychrophile include menthol (e.g., l-menthol) and derivatives thereof (e.g., menthyl lactate), methyl salicylate, camphor, essential oils derived from plants (e.g., mint and eucalyptus), and the like. Further, as with the thermal sensitive agent 26, the cold sensitive agent is preferably a substance that stimulates a temperature sensitive TRP channel.

In addition, the amount of the cold feeling agent applied to the back side is preferably larger than the amount applied to the abdomen side in terms of not being warm but being cold. For example, when the mattress is used in a lying posture, the discomfort due to the stuffiness can be reduced by adding a cold feeling agent to the buttocks which are most likely to be stuffy.

In addition, in order to improve the temperature effect, a small amount of the cooling agent 26 may be mixed into the temperature-sensitive agent 26, or in order to improve the cooling effect, a small amount of the temperature-sensitive agent 26 may be mixed into the cooling agent to improve the temperature or cooling effect.

Claims

1. A pants-type absorbent article having a vertical direction, a horizontal direction and a front-back direction intersecting with each other,

comprising an absorbent main body and a waist member, and having a waist opening, characterized in that,

an elastic member along the left-right direction is provided at an upper end portion of the waistline member,

the waist component is provided with a temperature sensing agent or a cold sensing agent,

the temperature sensitive agent or the cooling agent is provided below the elastic member in the vertical direction.

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

the elastic member is an opening rubber band,

the opening rubber band is bonded to the upper end portion of the waist member with an adhesive.

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

the waist member is provided with a plurality of panels,

the temperature sensitive agent or the cooling agent is provided on the skin side sheet of the plurality of waist members.

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

the waist member is provided with a printing area printed with patterns,

the print area is provided above the temperature sensitive agent or the cooling sensitive agent in the vertical direction.

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

the waist member is provided with a printing area printed with patterns,

the print area is provided below the temperature sensitive agent or the cooling sensitive agent in the vertical direction.

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

the waist member is provided with a printing area printed with patterns,

the print area and at least a part of the temperature sensitive agent or the cold sensitive agent overlap when viewed in the front-rear direction.

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

the absorbent body is provided with the temperature sensitive agent or the cold sensitive agent,

the temperature sensitive agent or the cold sensitive agent of the absorbent main body and the temperature sensitive agent or the cold sensitive agent of the waist member have overlapping portions when viewed in the front-rear direction.

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

the waist member is provided with a plurality of panels,

at least 1 sheet of the plurality of sheets has stretchability in the left-right direction,

the plurality of sheets are joined by a plurality of ultrasonic joining portions which are scattered in a state of being overlapped in the front-rear direction,

the waist member has an overlapping region overlapping with the absorbent main body and a non-overlapping region not overlapping with the absorbent main body when viewed in the front-rear direction,

the area of the ultrasonic bonding portion per unit area of the non-overlapping region is smaller than the area of the ultrasonic bonding portion per unit area of the overlapping region.

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

in a central region of the pants-type absorbent article trisected in a state of being elongated in the left-right direction, a total amount of the temperature sensitive agent or the cooling agent in a stomach side portion of the waist member is larger than a total amount of the temperature sensitive agent or the cooling agent in a back side portion of the pants-type absorbent article.

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

the sum of the amounts of the temperature sensitive agent or the cooling agent in the abdominal side portion of the lumbar member is larger than the sum of the amounts of the temperature sensitive agent or the cooling agent in the back side portion of the lumbar member.

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

the dimension of the waistline member in the left-right direction of the upper end portion is L0 in an extended state in which the waistline member is extended in the left-right direction, L1 in a natural state,

a dimension of the lumbar member in the left-right direction in a region below the upper end portion is L0 in the extended state and L2 in the natural state,

the L1 is smaller than the L2.

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

the waist member includes at least one of a nonwoven fabric sheet and a film sheet mixed with polyurethane.

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

the pants-type absorbent article has a center region in which the pants-type absorbent article in the state of being stretched in the left-right direction is trisected, and both side regions positioned on both sides of the center region,

the temperature sensitive agent or the cold sensitive agent is provided in at least a part of the central region of the waist member,

in the abdominal portion of the pants-type absorbent article, the total amount of the temperature sensitive agent or the cooling agent provided in the central region is greater than at least one of the total amount of the temperature sensitive agent or the cooling agent provided in the left region of the side regions and the total amount of the temperature sensitive agent or the cooling agent provided in the right region of the side regions.

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

the waist member comprises a plurality of sheets including at least 1 nonwoven fabric sheet,

the plurality of sheets are bonded by a plurality of ultrasonic bonding portions which are scattered in a state of being overlapped in the front-rear direction.

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

the waist member has a left-side projecting portion located on the left side of the left-side end of the absorbent main body and a right-side projecting portion located on the right side of the right-side end of the absorbent main body,

in a packaged state of the pants-type absorbent article, the left side extension portion is folded toward a right side with respect to a left side end of the absorbent main body, the right side extension portion is folded toward a left side with respect to a right side end of the absorbent main body,

in the packaged state, at least a part of the temperature sensitive agent or the cold sensitive agent overlaps with at least one of the left side protruding portion and the right side protruding portion when viewed in the front-rear direction.

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

the waist member is provided with a plurality of panels,

at least a part of an end portion of a sheet closest to a non-skin side among the plurality of sheets is inclined toward a skin side in a leg hole opening portion of the pants-type absorbent article.