CN109419586B

CN109419586B - Temperature sensing article

Info

Publication number: CN109419586B
Application number: CN201811015119.0A
Authority: CN
Inventors: 林俊久; 野田祐树; 鞍迫步; 秋山纱惠子
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2017-09-01
Filing date: 2018-08-31
Publication date: 2022-07-05
Anticipated expiration: 2038-08-31
Also published as: JP7033868B2; CN109419586A; JP2019042165A

Abstract

The invention provides a temperature-sensitive article containing a temperature-sensitive agent, which has a short time until a temperature is sensed. A temperature sensitive article (1) is provided with a liquid permeable sheet (7) and a liquid impermeable sheet (9), the temperature sensitive article (1) is provided with a temperature sensitive region (31) containing a temperature sensitive solution containing a temperature sensitive agent and a solvent which activate TRP channels, and the liquid permeable sheet (7) contains a material selected from the group consisting of a heat generating material, a heat insulating material and a moisture absorbing material, and any combination thereof.

Description

Temperature sensing article

Technical Field

The present invention relates to a temperature sensitive article.

Background

Patent document 1 describes an absorbent article, preferably a sanitary disposable absorbent article, including a material capable of transmitting a sensation to a wearer without creating an external condition to be perceived by the wearer in order to improve comfort.

In addition, patent document 1, paragraph [0040], discloses that a heating agent is a preferable material, and that the heating agent can stimulate (i.e., warm) the temperature receiver without causing a temperature change on the body surface of the wearer of the article.

Further, patent document 1, paragraph [0109], discloses, as a carrier vehicle (carrier vehicle) suitable for a material-containing administration system, a composition in the form of a lotion, cream, oil, ointment, powder, emulsion, foam, or gel, an aqueous or alcoholic solution, an oil or lipid such as hydrocarbon oil, fatty acid ester, long-chain alcohol and silicone oil, or an ultrafine particulate solid such as starch or talc.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Hei-2004-528090

Disclosure of Invention

Problems to be solved by the invention

The inventors of the present application confirmed that: when a heating agent and a lipophilic solvent such as oil described in patent document 1 are combined, the time required for the wearer to feel a desired temperature (warming sensing time) tends to be longer than when a heating agent such as iron powder, a heating agent, and a hydrophilic solvent (a combination of water and the like) are combined, and the wearer tends to feel itching particularly at the initial stage of wearing.

Accordingly, an object of the present invention is to provide a temperature sensitive article containing a temperature sensitive agent, which has a short time until a temperature is sensed.

Means for solving the problems

The present inventors have found a temperature-sensitive article comprising a liquid-permeable sheet and a liquid-impermeable sheet, wherein the temperature-sensitive article comprises a temperature-sensitive region containing a temperature-sensitive solution containing a temperature-sensitive agent for activating a TRP (transient receptor potential) channel and a solvent, and wherein the liquid-permeable sheet comprises a material selected from the group consisting of a heat-generating material, a heat-insulating material, and a moisture-absorbing material, and any combination thereof.

ADVANTAGEOUS EFFECTS OF INVENTION

The temperature-sensitive article containing a temperature-sensitive agent of the present invention has a short time until the temperature-sensitive article senses the temperature.

Drawings

Fig. 1 is a plan view of a sanitary napkin 1 according to embodiment 1.

Fig. 2 is an exploded perspective view of the sanitary napkin 1 according to embodiment 1.

Fig. 3 is a view showing a wearing state of the sanitary napkin 1 according to embodiment 1.

Fig. 4 is a diagram for explaining a pants-type sanitary napkin 101 according to embodiment 2.

Fig. 5 is a diagram illustrating a disposable diaper 201 according to embodiment 3.

Fig. 6 is a perspective view of an individual package 303 in which a temperature-sensitive sheet 301 is individually packaged, according to embodiment 4.

Fig. 7 is a perspective view of a temperature-sensitive sheet 301 according to embodiment 4.

Fig. 8 is an exploded perspective view of a temperature-sensitive sheet 301 according to embodiment 4.

Fig. 9 is a view showing a wearing state of the temperature-sensitive sheet 301 according to embodiment 4.

Description of the reference numerals

1 sanitary napkin

3 absorbent body

5 temperature sensing body

7 liquid-permeable sheet

8a skin contact surface

8b non-skin contact surface

9 liquid-impermeable sheet

11 absorbent body

13 temperature sensitive solution holding sheet

15 shape-retaining member

17 overlap part

19 garment to be worn

21 adhesive part

23 wing part

25 sealing part

27 embossing part

29 packaging sheet

31 temperature sensitive region

L longitudinal direction

W width direction

T thickness direction

F₁Length direction 1 st folding shaft

F₂Length direction 2 nd folding shaft

F₃1 st folding axis in width direction

F₄Width direction No.2 folding axis

F₅Width direction 3 rd folding shaft

F₆Folding shaft

Detailed Description

Specifically, the present invention relates to the following modes.

[ means 1]

A temperature-sensitive article comprising a liquid-permeable sheet and a liquid-impermeable sheet,

the temperature sensitive article includes a temperature sensitive region containing a temperature sensitive solution containing a temperature sensitive agent that activates a TRP channel and a solvent,

the liquid-permeable sheet includes a material selected from the group consisting of a heat-generating material, a heat-insulating material, and a moisture-absorbing material, and any combination thereof.

The present inventors have confirmed that a heat-sensitive article containing a heat-sensitive agent tends to have a longer time to reach a desired temperature (hereinafter, this time is referred to as "warm sensing time") in an initial stage of wearing, specifically, than a heat-sensitive article containing a heat-generating agent (for example, iron powder), and the wearer tends to feel itchiness during this warm sensing time.

Since the liquid-permeable sheet of the temperature-sensitive article of the present invention contains a material selected from the group consisting of a heat-generating material, a heat-insulating material, a moisture-absorbing material, and any combination thereof (hereinafter, sometimes simply referred to as "functional material"), the skin of the wearer is swollen mainly with moisture, mainly the stratum corneum, by evaporation, perspiration, and the like of the wearer, and the temperature-sensitive solution easily reaches the TRP channel mainly present in keratinocytes. As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

In addition, the TRP channel in the temperature sensitive agent contact portion of the skin of the wearer, which is in contact with the temperature sensitive agent, is activated by the temperature sensitive agent, and as a result, heat is generated from the temperature sensitive agent contact portion via the sympathetic nervous system, and it is expected that the temperature of the temperature sensitive agent contact portion of the skin of the wearer will be raised.

[ means 2]

The temperature-sensitive article according to claim 1, wherein the temperature-sensitive article is an absorbent article further comprising an absorber between the liquid-permeable sheet and the liquid-impermeable sheet, the temperature-sensitive solution being disposed at a position not overlapping the absorber in the thickness direction, and the absorbent article having a thickness direction and a width direction.

When the temperature sensitive agent is disposed at a position not overlapping the absorbent body in the thickness direction of the temperature sensitive article (absorbent article), that is, at the peripheral portion of the excretory opening contact region, the wearer tends to feel itchy more easily during the warm sensing time than when the temperature sensitive agent is disposed at the excretory opening contact region. Since the temperature-sensitive region in the temperature-sensitive article (absorbent article) is disposed at a position not overlapping with the absorbent body in the thickness direction, a temperature sensation can be given to the lower abdomen of the wearer (such as the uterus in the case where the wearer is a female), and the wearer is less likely to feel itchy during the temperature-sensitive time.

[ means 3]

The temperature-sensitive article according to claim 2, wherein the temperature-sensitive region is disposed at a position corresponding to a lower abdomen of the wearer and is a region wider than the absorber in the width direction.

Since the temperature-sensitive region of the temperature-sensitive article is disposed within a predetermined range, the portion corresponding to the uterus of the wearer can be warmed, and the wearer is less likely to feel itchy.

[ means 4]

The temperature-sensitive article according to aspect 3, wherein the temperature-sensitive article is folded in the longitudinal direction by a widthwise folding axis extending in the widthwise direction, and the widthwise folding axis is disposed so as to overlap the temperature-sensitive region in the thickness direction in the expanded state of the temperature-sensitive article.

In the temperature sensitive article, the widthwise folding axis is disposed so as to overlap the temperature sensitive region in the thickness direction in the expanded state of the temperature sensitive article. Since the material density of the material (liquid-permeable sheet, temperature-sensitive solution holding sheet, etc.) of the portion of the temperature-sensitive region overlapping the width-direction folding axis, that is, the portion of the temperature-sensitive region overlapping the width-direction folding axis, is higher than the material density of the portion of the width-direction folding axis not overlapping the width-direction folding axis, the amount (basis weight) of the temperature-sensitive solution in the portion of the temperature-sensitive region overlapping the width-direction folding axis tends to be larger than the amount (basis weight) of the temperature-sensitive solution in the portion of the width-direction folding axis not overlapping the width-direction folding axis.

Therefore, in the above temperature-sensitive article, the overlapping portion of the folding axis in the width direction of the temperature-sensitive region can impart a temperature sensation to pelvic lymph nodes (e.g., an internal iliac lymph node, a closed lymph node, an external iliac lymph node, an anterior sacral lymph node, a total iliac lymph node, a major ligament lymph node, a sacral lymph node, an upper inguinal lymph node, and a periaortic lymph node), inguinal lymph nodes (e.g., a superficial inguinal lymph node and a deep inguinal lymph node), and the like, and increase the temperature thereof, and thus can be expected to impart a massage effect.

[ means 5]

The temperature-sensitive article according to aspect 3 or 4, wherein the temperature-sensitive article is folded in the width direction by a pair of longitudinal folding axes extending in the longitudinal direction, and the pair of longitudinal folding axes are disposed so as to be located further outward in the width direction than the absorber and so as to overlap the temperature-sensitive region in the thickness direction in a state where the temperature-sensitive article is unfolded.

In the temperature sensitive article, the pair of longitudinal folding axes are disposed so as to overlap the temperature sensitive region in the thickness direction in the expanded state of the temperature sensitive article. Since the material density of the material (liquid-permeable sheet, temperature-sensitive solution holding sheet, etc.) of the portion of the temperature-sensitive region that overlaps the pair of longitudinal folding axes, that is, the portion of the temperature-sensitive region that overlaps the pair of longitudinal folding axes, is higher than the material density of the portion of the temperature-sensitive region that does not overlap the pair of longitudinal folding axes, the amount (basis weight) of the temperature-sensitive solution in the portion of the temperature-sensitive region that overlaps the longitudinal folding axes tends to be larger than the amount (basis weight) of the temperature-sensitive solution in the portion of the longitudinal folding axes that does not overlap the longitudinal folding axes.

Therefore, in the above temperature-sensitive article, the overlapping portion of the longitudinal folding axis of the temperature-sensitive region can impart a temperature sensation to pelvic lymph nodes (e.g., an internal iliac lymph node, a closed lymph node, an external iliac lymph node, an anterior sacral lymph node, a total iliac lymph node, a major ligament lymph node, a sacral lymph node, an upper inguinal lymph node, and a periaortic lymph node), inguinal lymph nodes (e.g., a superficial inguinal lymph node and a deep inguinal lymph node), and the like, and increase the temperature thereof, thereby being expected to impart a massage effect.

[ means 6]

The temperature-sensitive article according to any one of aspects 2 to 5, wherein the solvent is a lipophilic solvent.

The inventors of the present application confirmed that: when the solvent constituting the temperature sensitive solution is a lipophilic solvent, the temperature sensing time tends to be longer than when the solvent constituting the temperature sensitive solution is a hydrophilic solvent such as water, and itching is likely to be felt due to the long temperature sensing time.

In the above temperature sensitive article, since the liquid-permeable sheet contains a predetermined functional material, the temperature sensing time can be shortened, and the wearer is less likely to feel itchy during the temperature sensing time. In the temperature sensitive article (absorbent article), since the solvent is a lipophilic solvent, the temperature sensitive solution is less likely to migrate into the absorbent body, and the temperature sensitivity of the wearer is imparted, so that the temperature sensitivity efficiency of the temperature sensitive agent is less likely to decrease.

[ means 7]

The temperature-sensitive article according to any one of aspects 2 to 6, wherein the temperature-sensitive article does not contain a polymer absorbent at a position overlapping with the temperature-sensitive region in the thickness direction.

Since the temperature sensitive article does not contain a polymer absorbent at a position overlapping the temperature sensitive region in the thickness direction of the temperature sensitive article, moisture, water vapor, and the like present in the temperature sensitive region and the skin of the wearer in contact with the temperature sensitive region are not easily absorbed into the absorbent polymer, and it is easy to maintain a state in which the skin of the wearer is swollen mainly with moisture, and the temperature sensitive solution easily reaches the TRP channel mainly present in keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

[ means 8]

The temperature-sensitive article according to any one of aspects 2 to 7, wherein the absorbent article is selected from the group consisting of a sanitary napkin, a pants-type sanitary napkin, and a disposable diaper.

The temperature-sensitive article is selected from the group consisting of a sanitary napkin, a pants-type sanitary napkin, and a disposable diaper, and therefore, the temperature-sensitive article can exert absorption performance and can suppress itching in the lower abdomen of the wearer during the warm sensing time and impart a temperature sensation to the lower abdomen of the wearer.

[ means 9]

The temperature sensitive article according to any one of aspects 1 to 8, wherein the liquid-impermeable sheet is composed of a moisture-impermeable film.

In the above-mentioned temperature sensitive article, since the liquid-impermeable sheet is a moisture-impermeable film, moisture, water vapor, and the like present in the temperature sensitive region and the skin of the wearer in contact with the temperature sensitive region are not easily absorbed into the absorbent polymer, and it is easy to maintain a state in which the skin of the wearer is mainly swollen with moisture, and the temperature sensitive solution easily reaches the TRP channel mainly present in keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

[ means 10]

The temperature-sensitive article according to any one of aspects 1 to 9, wherein the temperature-sensitive agent is an agonist for TRPV1 receptor.

In the above absorbent article, the temperature sensitive agent is an agonist against the TRPV1 receptor, and therefore, the wearer can feel a temperature exceeding 43 ℃ as the activation temperature threshold of the TRPV1 receptor when in use.

[ means 11]

The temperature-sensitive article according to any one of aspects 1 to 10, wherein the temperature-sensitive article does not contain a heat generating agent.

Since the temperature sensitive article does not contain a heat generating agent, the temperature sensitive article is less likely to cause low-temperature burn to the wearer even when the temperature sensitive article is used for a long time.

The temperature sensitive article of the present invention will be described in detail below.

Fig. 1 to 3 are views for explaining a sanitary napkin 1 as a temperature sensitive article according to an embodiment of the present invention (hereinafter referred to as "embodiment 1"). Hereinafter, the "sanitary napkin for sanitary use as the temperature sensitive article according to embodiment 1" may be simply referred to as the "sanitary napkin for sanitary use according to embodiment 1". Specifically, fig. 1 is a plan view of a sanitary napkin 1 according to embodiment 1. Fig. 2 is an exploded perspective view of the sanitary napkin 1 according to embodiment 1. Fig. 3 is a view showing a state in which the sanitary napkin 1 is worn.

A sanitary napkin 1 as a temperature-sensitive article according to embodiment 1 has a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other, and includes: the absorbent article includes an absorbent body 3 and a temperature-sensitive body 5 disposed above the absorbent body 3 in the longitudinal direction L. The sanitary napkin 1 includes, in the absorption body 3: a liquid-permeable sheet 7 that comes into contact with the skin of the wearer when worn; a liquid-impermeable sheet 9 that comes into contact with a garment 19 to be worn when worn; and an absorber 11 disposed between the liquid-permeable sheet 7 and the liquid-impermeable sheet 9. The sanitary napkin 1 further includes, in the temperature-sensitive body 5: a liquid-permeable sheet 7 that comes into contact with the skin of the wearer when worn; a liquid-impermeable sheet 9 that comes into contact with a garment 19 to be worn when worn; and a temperature-sensitive solution retaining sheet 13 and a shape retaining member 15 disposed between the liquid-permeable sheet 7 and the liquid-impermeable sheet 9. The shape retaining member 15 is disposed on the liquid-impermeable sheet 9 side of the temperature sensitive solution retaining sheet 13.

The liquid-permeable sheet 7 in the absorption body 3 and the liquid-permeable sheet 7 in the temperature-sensitive body 5 are formed of an integral sheet, and the liquid-impermeable sheet 9 in the absorption body 3 and the liquid-impermeable sheet 9 in the temperature-sensitive body 5 are also formed of an integral sheet. In addition, the absorbent body 11 in the absorbent body 3 and the shape retaining member 15 in the temperature-sensitive body 5 are partially overlapped in the overlapping portion 17 in the thickness direction T, and the absorbent body 11 is disposed at a position closer to the liquid-permeable sheet 7 than the shape retaining member 15 in the overlapping portion 17.

The liquid-permeable sheet 7 includes a skin contact surface 8a and a non-skin contact surface 8b, and is made of a breathable nonwoven fabric. The air-permeable nonwoven fabric is made of 3-layer webs containing hot-melt adhesive fibers, namely, a1 st web (constituting the skin-contacting surface 8a of the liquid-permeable sheet 7), a 2 nd web, and a 3 rd web (constituting the non-skin-contacting surface 8b of the liquid-permeable sheet 7), and the 1 st web contains moisture-absorbing heat-generating fibers.

The sanitary napkin 1 includes a bonding portion 21 for fixing the sanitary napkin 1 to a garment 19 worn by a wearer in both the absorption body 3 and the temperature-sensitive body 5. One surface of the pressure-sensitive adhesive portion 21 is fixed to the liquid-impermeable sheet 9, and the other surface is temporarily fixed to the inner surface of the packaging sheet 29 to which peelability is imparted.

The sanitary napkin 1 has a longitudinal direction 1-th folding axis F extending in the longitudinal direction L in an unused state₁And a 2 nd folding axis F in the length direction₂And a1 st folding axis F extending in the width direction W and in the width direction₃2 nd folding axis F in width direction₄And a 3 rd folding axis F in the width direction₅The base shaft is folded together with the package sheet 29 to form an individual package (not shown) of the sanitary napkin 1. In addition, the 1 st folding axis F in the width direction₃2 nd folding axis F in width direction₄And a 3 rd folding axis F in the width direction₅Are respectively arranged above, in the center and below the sanitary napkin 1.

In addition, the 1 st folding axis F in the width direction₃The sanitary napkin 1 and the packaging sheet 29 are disposed so as to overlap the temperature-sensitive solution holding sheet 13 (a temperature-sensitive region 31 described later) in the thickness direction T in the unfolded state. Longitudinal direction 1 st folding axis F₁And a 2 nd folding axis F in the length direction₂The sanitary napkin 1 and the packaging sheet 29 are arranged so as not to overlap the absorbent body 11 in the thickness direction T but to overlap the temperature-sensitive solution holding sheet 13 (a temperature-sensitive region 31 described later) in the thickness direction T in the unfolded state.

The individual package of the sanitary napkin 1 is formed as follows: the sanitary napkin 1 and the packaging sheet 29 are folded along the longitudinal direction 1 st folding axis F₁And a 2 nd folding axis F in the length direction₂As a base axis, the sanitary napkin is arranged in the direction of 1The inner side is folded in the width direction W and then folded with the 1 st folding axis F in the width direction₃And a 3 rd folding axis F in the width direction₅The sanitary napkin 1 is folded inward in the longitudinal direction L as a base axis, and then folded along the 2 nd folding axis F in the width direction₄The sanitary napkin 1 is folded inward in the longitudinal direction L as a base axis.

The sanitary napkin 1 further includes: the pair of flaps 23, the seal portions 25, the embossed portions 27, and the like for fixing the sanitary napkin 1 to the clothing 19 are well known in the art, and therefore, the description thereof is omitted.

In the sanitary napkin 1, when the absorbent body 3 and the temperature-sensitive body 5 are disposed on the clothing 19 to be worn so that the excretory opening contact region (not shown) of the absorbent body 11 of the absorbent body 3 is in contact with the excretory opening contact region of the wearer, the temperature-sensitive body 5, particularly the temperature-sensitive solution retaining sheet 13, is provided so as to be disposed at a position corresponding to the lower abdomen of the wearer. In other words, the distance from the excretory opening contact region (not shown) of the absorbent body 11 of the absorbent body 3 to the thermo-sensitive solution retaining sheet 13 of the thermo-sensitive body 5 is configured to be substantially equal to the distance from the excretory opening of the wearer to the lower abdomen (distance on the skin surface).

The absorption body 3 has the same shape as a normal sanitary napkin. The temperature-sensitive solution holding sheet 13 is made of a nonwoven fabric, and the entire temperature-sensitive solution (not shown) is coated thereon, and the entire temperature-sensitive solution holding sheet 13 constitutes the temperature-sensitive region 31. A part of the temperature sensitive solution also migrates to the region of the liquid-permeable sheet 7 on the temperature sensitive solution-holding sheet 13 side, and the region of the liquid-permeable sheet 7 on the temperature sensitive solution-holding sheet 13 side also constitutes the temperature sensitive region 31.

In addition, the structure is as follows: the length of the temperature-sensitive solution holding sheet 13 in the width direction W is longer than the length of the absorbent body 11 in the width direction W, and the temperature-sensitive region 31 is disposed in a region wider than the absorbent body 11 in the width direction W.

The warming solution comprises a warming agent that activates the TRP channel and a lipophilic solvent. When the sanitary napkin 1 is used by being fixed to a garment 19 to be worn, the temperature-sensitive solution contained in the temperature-sensitive region 31 (temperature-sensitive solution holding sheet 13) permeates through the liquid-permeable sheet 7 and comes into contact with the skin of the wearer, and the TRP channel at the temperature-sensitive agent contact portion where the skin of the wearer contacts the temperature-sensitive agent can be effectively activated, thereby effectively imparting a temperature sensation to the lower abdomen of the wearer.

By giving a temperature sensation to the lower abdomen of the wearer, the TRP channel in the temperature sensitive agent contact portion where the skin of the lower abdomen of the wearer contacts the temperature sensitive agent is activated, and as a result, the heat is expected to be generated by the temperature sensitive agent contact portion via the sympathetic nervous system, and the temperature of the portion where the skin of the wearer contacts the temperature sensitive agent is increased, and further, the portion close to the uterus of the wearer is expected to be warmed, and the wearer's menstrual pain is alleviated.

In addition, by warming the portion close to the uterus of the wearer, it is expected to reduce Premenstrual Syndrome (Premenstrual Syndrome), aversion to cold, climacteric disorder, and the like of the wearer.

The inventor of the application finds that: in a temperature sensitive article containing a temperature sensitive agent, the time until the temperature is sensed (temperature sensing time) tends to be longer than that of a heat generating article containing a heat generating agent (for example, iron powder), and the wearer tends to feel itchy during the temperature sensing time.

Since the liquid-permeable sheet 7 contains moisture-absorbing and heat-generating fibers on the skin contact surface 8a side, when moisture such as evaporation or perspiration from the skin of the wearer is supplied, the moisture-absorbing and heat-generating fibers in the liquid-permeable sheet 7 generate heat, and the wearer can easily perspire. Then, the moisture due to the wearer's perspiration swells the skin of the wearer mainly the stratum corneum with the moisture. The warm-sensing solution readily reaches the TRP channel that is mainly present in keratinocytes (keratinocytes). As a result, the wearer can easily feel a temperature at an early stage of wearing the sanitary napkin 1, and the time for sensing the temperature becomes shorter. Further, if the temperature sensing time of the sanitary napkin 1 is shortened, the wearer is less likely to feel itchy during the temperature sensing time.

In addition, the 1 st folding axis F in the width direction₃With the 1 st folding axis F in the length direction₁And a 2 nd folding axis F in the length direction₂In the unfolded state of the sanitary napkin 1 and the packaging sheet 29, the temperature-sensitive region 31 (temperature-sensitive solution holding sheet 13) is overlapped with the temperature-sensitive region T in the thickness directionThe mode arrangement can further impart a warm feeling to the pelvic lymph nodes (the internal iliac lymph nodes, the closed lymph nodes, the external iliac lymph nodes, the sacral anterior lymph nodes, the total iliac lymph nodes, the cardinal ligament lymph nodes, the sacral lymph nodes, the inguinal upper lymph nodes, the periaortic lymph nodes, etc.), the inguinal lymph nodes (the inguinal shallow lymph nodes, the inguinal deep lymph nodes, etc.), and the like of the wearer.

Fig. 4 is a view for explaining a pants-type sanitary napkin 101 as a temperature-sensitive article according to another embodiment of the present invention (hereinafter referred to as "embodiment 2"), which is a view showing a worn state. Hereinafter, the "pants-type sanitary napkin as the temperature sensitive article according to embodiment 2" may be simply referred to as "pants-type sanitary napkin according to embodiment 2".

The pants-type sanitary napkin 101 according to embodiment 2 is composed of a pants part 103 and an absorbent article part 105 disposed on the inner surface of the pants part 103. The absorbent article portion 105 includes: a liquid-permeable sheet (not shown) that contacts the skin of the wearer when worn in the absorbent body 107; a liquid-impermeable sheet (not shown) that contacts the pants section 103; and an absorber 111 disposed therebetween. The absorbent article portion 105 further includes: the temperature-sensitive main body 109 includes a liquid-permeable sheet (not shown) that contacts the skin of the wearer when worn, a liquid-impermeable sheet (not shown) that contacts the pants part 103, and a temperature-sensitive solution holding sheet 113 and a shape-retaining member 115 disposed therebetween.

The liquid-permeable sheet (not shown) in the absorption body 107 and the liquid-permeable sheet (not shown) in the temperature-sensitive body 109 are formed of an integrated sheet made of nonwoven fabric. The liquid-impermeable sheet (not shown) in the absorption body 107 and the liquid-impermeable sheet (not shown) in the temperature-sensitive body 109 are also formed of an integral sheet.

The temperature-sensitive solution holding sheet 113 of the temperature-sensitive body 109 is made of a nonwoven fabric in the same manner as the temperature-sensitive solution holding sheet 13 of embodiment 1. The entire temperature-sensitive solution holding sheet 113 is coated with a temperature-sensitive solution (not shown) containing a temperature-sensitive agent that activates a TRP channel and a lipophilic solvent, and the entire temperature-sensitive solution holding sheet 113 constitutes a temperature-sensitive region 117. A part of the temperature sensitive solution also migrates to the region of the liquid-permeable sheet (not shown) on the temperature sensitive solution holding sheet 113 side, and the region of the liquid-permeable sheet (not shown) on the temperature sensitive solution holding sheet 113 side also constitutes the temperature sensitive region 117.

The liquid-permeable sheet (not shown) is composed of a breathable nonwoven fabric including heat-fusible fibers and hollow fibers as heat-insulating fibers.

In the pants-type sanitary napkin 101 according to embodiment 2, since the liquid-permeable sheet (not shown) contains hollow fibers, the body temperature of the wearer is not easily lost when the pants-type sanitary napkin 101 is worn, and the wearer is likely to sweat. Then, the skin of the wearer is swollen mainly by the moisture due to the moisture of the wearer's perspiration, and the temperature-sensitive solution easily reaches the TRP channel mainly present in the keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

By giving a temperature sensation to the lower abdomen of the wearer, it is expected that the temperature-sensitive agent-contacting portion generates heat, the temperature of the wearer's skin at the portion contacting the temperature-sensitive agent is raised, and further, the portion close to the uterus of the wearer is warmed, and the physiological pain of the wearer is alleviated, and the Premenstrual Syndrome (Premenstrual Syndrome), cold intolerance, climacteric disorder, and the like of the wearer are alleviated.

Fig. 5 is a view for explaining a disposable diaper 201 for adults as a temperature sensitive article according to another embodiment (hereinafter, referred to as "embodiment 3"), and is a view showing a worn state. Hereinafter, the "disposable diaper as the temperature sensitive article according to embodiment 3" may be simply referred to as the "disposable diaper according to embodiment 3".

The disposable diaper 201 according to embodiment 3 includes: a liquid-permeable sheet 203 that contacts the skin of the wearer; a liquid-impermeable sheet 205; an absorber 207 disposed between the liquid-permeable sheet 203 and the liquid-impermeable sheet 205; and a temperature sensitive solution retaining sheet 209 disposed above the absorbent body 207 and between the liquid-permeable sheet 203 and the liquid-impermeable sheet 205.

The temperature-sensitive solution holding sheet 209 is disposed so as to be positioned at a position corresponding to the lower abdomen of the wearer when the disposable diaper 201 is worn.

The temperature-sensitive solution holding sheet 209 is made of a nonwoven fabric, and the entire temperature-sensitive solution (not shown) is coated thereon, and the entire temperature-sensitive solution holding sheet 209 constitutes a temperature-sensitive region 211. A part of the temperature sensitive solution also migrates to the region of the liquid-permeable sheet 203 on the temperature sensitive solution holding sheet 209 side, and the region of the liquid-permeable sheet 203 on the temperature sensitive solution holding sheet 209 side also constitutes the temperature sensitive region 211.

The liquid-permeable sheet 203 is composed of a breathable nonwoven fabric containing a hot-melt adhesive fiber and a cotton fiber as a hygroscopic fiber.

In the disposable diaper 201 according to embodiment 3, since the liquid-permeable sheet 203 contains cotton fibers as hygroscopic fibers, when a wearer discharges body fluids (sweat, urine, etc.) while wearing the disposable diaper 201, the cotton fibers absorb the body fluids, the skin of the wearer is swollen mainly with moisture, and a temperature-sensitive solution easily reaches TRP channels mainly present in keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

By giving a temperature sensation to the lower abdomen of the wearer, the TRP channel of the temperature sensitive agent contact portion where the skin of the lower abdomen of the wearer is in contact with the temperature sensitive agent is activated, and as a result, it is expected that heat is generated in the temperature sensitive agent contact portion via the sympathetic nervous system to raise the temperature of the temperature sensitive agent contact portion of the skin of the wearer,

as a result, when the wearer of the disposable diaper 201 is female, it is expected that: (i) discharging prostaglandin which is a main cause of physiological pain, relaxing muscles such as uterine muscles, and relieving physiological pain; (ii) promoting blood flow, promoting lymph flow, discharging waste, relieving cold feeling, and burning fat; (iii) improving immunity, etc.

When the wearer of the disposable diaper 201 is male, it is expected that: (i) expelling prostaglandins, relaxing muscles, and relieving pain; (ii) promoting blood flow, promoting lymph flow, discharging waste, improving cold feeling, and burning fat; (iii) improving immunity, etc.

Fig. 6 to 9 are views for explaining a temperature-sensitive sheet 301 as a temperature-sensitive article according to another embodiment (hereinafter, referred to as "embodiment 4") of the present invention. Hereinafter, the "temperature-sensitive sheet as the temperature-sensitive article according to embodiment 4" may be simply referred to as the "temperature-sensitive sheet according to embodiment 4". Specifically, fig. 6 is a perspective view of an individually packaged body 303 of a temperature-sensitive sheet in which the temperature-sensitive sheets 301 according to embodiment 4 are individually packaged. Fig. 7 is a perspective view of a temperature-sensitive sheet 301 according to embodiment 4. Fig. 8 is an exploded perspective view of the temperature-sensitive sheet 301 according to embodiment 4. Fig. 9 is a view showing a wearing state of the temperature-sensitive sheet 301 according to embodiment 4. Hereinafter, the "individually packaged body of a temperature-sensitive sheet" may be simply referred to as an "individually packaged body".

The temperature-sensitive sheet 301 according to embodiment 4 includes, in order: a liquid-permeable sheet 307 that contacts the skin of the wearer; a temperature-sensitive solution holding sheet 309; a liquid-impermeable sheet 311 that comes into contact with a garment to be worn; a bonding part 313 fixed to the liquid-impermeable sheet 311 for bonding the liquid-impermeable sheet 311 to a garment 321; and a release sheet 315 for temporarily fixing the adhesive portion 313, the release sheet having a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other. The liquid-permeable sheet 307 has a skin contact surface 331 and a non-skin contact surface 333.

The liquid-permeable sheet 307 is made of a breathable nonwoven fabric. The air-permeable nonwoven fabric is made of 3-layer webs including hot-melt adhesive fibers, namely, a1 st web (constituting the skin contact surface 331 of the liquid-permeable sheet 307), a 2 nd web, and a 3 rd web (constituting the non-skin contact surface 333 of the liquid-permeable sheet 307), and the 1 st web includes moisture-absorbing heat-generating fibers.

The temperature-sensitive solution holding sheet 309 is made of a nonwoven fabric, and the entire surface thereof is coated with a temperature-sensitive solution (not shown) containing a temperature-sensitive agent that activates the TRP channel and water as a hydrophilic solvent, and the entire surface of the temperature-sensitive solution holding sheet 309 constitutes the temperature-sensitive region 341. A part of the temperature-sensitive solution also migrates to the region of the liquid-permeable sheet 307 on the temperature-sensitive solution holding sheet 309 side, and the region of the liquid-permeable sheet 307 on the temperature-sensitive solution holding sheet 309 side also constitutes the temperature-sensitive region 341.

The temperature-sensitive sheet 301 includes a hinge F extending in parallel with the width direction W at the center in the longitudinal direction L₆. In the individual package 303, the temperature-sensitive sheet 301 is folded around the folding axis F₆The skin contact surface 331 of the liquid-permeable sheet 307 is folded inward as a base, and is wrapped in a wrapping sheet 305.

The bonding portion 313 is constituted by a plurality of bonding portion portions 314. The plurality of adhesive portions 314 extend in the width direction W to reach both ends of the temperature-sensitive sheet 301 in the width direction W. The plurality of bonding portions 314 are arranged at predetermined intervals in the longitudinal direction L.

The release sheet 315 has the same outer edge shape as the liquid-impermeable sheet 311, and the release sheet 315 is disposed so as to cover the entire bonding portion 313 (the plurality of bonding portion portions 314).

As shown in fig. 6, the temperature-sensitive sheet 301 is folded twice and packaged in a packaging sheet 305 to form an individual package 303. Specifically, it is formed by: the individual package 303 is folded by a folding axis F₆The temperature-sensitive sheet 301 obtained by folding the skin contact surface 331 of the liquid-permeable sheet 7 twice inward is sandwiched by 2 packaging sheets 305 as a base shaft, and a seal portion 335 is provided at the edge of the 2 packaging sheets 305.

When the wearer uses the temperature sensitive sheet 301, the individual package 303 is detached from the cut portion 337 of the individual package 303, the temperature sensitive sheet 301 is taken out of the individual package 303, and the release sheet 315 is peeled off from the temperature sensitive sheet 301. Next, the wearer fixes the adhesive portion 313 of the temperature-sensitive sheet 301 to the inner surface of the clothing 321, specifically, the shorts, and uses the temperature-sensitive sheet 301 in a state where the skin contact surface 331 of the temperature-sensitive sheet 301 is in contact with the skin of the wearer.

Since the liquid-permeable sheet 307 contains the moisture-absorbing and heat-generating fibers on the skin contact surface 331 side, when moisture such as evaporation or perspiration from the skin of the wearer is supplied, the moisture-absorbing and heat-generating fibers in the liquid-permeable sheet 307 generate heat, and the wearer is likely to sweat. Then, the skin of the wearer is swollen mainly by the moisture due to the moisture of the wearer's perspiration, and the temperature-sensitive solution easily reaches the TRP channel mainly present in the keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

In the temperature-sensitive article of the present invention, the temperature-sensitive solution contains a temperature-sensitive agent that activates the TRP channel and a solvent.

The above-mentioned thermosensor is not particularly limited as long as it activates a TRP channel, and examples thereof include: an agonist for TRPV1 receptor, an agonist for TRPV3 receptor, etc., preferably an agonist for TRPV 1. Since the temperature is higher than the activation temperature threshold of TRPV1 receptor, i.e., 43 ℃, the wearer can be given a high temperature feeling.

The temperature sensitive agent is preferably a plant-derived compound from the viewpoint of the feeling of comfort of the wearer. Examples of the temperature sensitive agent include: capsinoids, capsaicinoids, homodihydrocapsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, nonivamide, etc.), capsorubin, benzyl nicotinate, β -butoxyethyl nicotinate, N-acetyl vanillylamide (N- アシルワニルアミド), vanillylnonanamide, polyhydric alcohols, paprika, capsicum tincture, capsicum extract, vanillyl nonanoate, vanillyl alcohol alkyl ether derivatives (e.g., vanillyl alcohol ethyl ether, vanillyl alcohol butyl ether, vanillyl alcohol pentyl ether, vanillyl alcohol hexyl ether), isovanillyl alcohol alkyl ether, ethyl vanillyl alcohol alkyl ether, veratryl alcohol derivatives, substituted benzyl alcohol alkyl ethers, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, gingerol, zingerone, hesperidin and pyrrolidone carboxylic acid, and any combination thereof.

From the viewpoint of making it difficult for the wearer to feel pain, itch, and the like, the warming agent is preferably not capsaicin, and more preferably: vanillyl alcohol alkyl ether derivatives (e.g., vanillyl ethyl ether, vanillyl butyl ether, vanillyl pentyl ether, vanillyl hexyl ether ginger extract, ginger oil, gingerol and zingerone, and any combination thereof.

The solvent is not particularly limited as long as it can contain the temperature-sensitive agent, and examples thereof include: lipophilic solvents and hydrophilic solvents. The solvent can dissolve or disperse the temperature sensitive agent, for example.

Examples of the lipophilic solvent include: and oils and fats such as natural oils (e.g., fatty acid esters such as triglycerides, coconut oil, linseed oil, and the like), hydrocarbons (e.g., paraffin, 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; higher alcohols such as octanol, lauryl alcohol, and myristyl alcohol.

When the liquid-permeable sheet contains a heat-generating material described later, the solvent is preferably a solvent other than water, and is preferably an oleophilic solvent. In the case where the liquid-permeable sheet is made of a heat insulating material described later, the solvent may be a lipophilic solvent or a hydrophilic solvent. Further, when the liquid-permeable sheet contains a hygroscopic material, the solvent is preferably a hydrophilic solvent, and more preferably water.

In addition, from the viewpoint of easy control of volatility, and particularly easy reduction of volatility, the solvent is preferably an oil or fat (lipophilic solvent) or an alcohol (hydrophilic solvent). In the case where the temperature sensitive article is an absorbent article, the solvent is preferably a lipophilic solvent in view of the difficulty in inhibiting the absorption.

The temperature sensitive solution preferably contains 0.0001 to 5.0% by mass, more preferably 0.0005 to 3.0% by mass, still more preferably 0.1 to 1.0% by mass, and still more preferably 0.3 to 0.7% by mass of the temperature sensitive agent. This is from the viewpoint of the temperature-sensitive effect.

The temperature sensitive article of the present invention preferably contains 0.001 to 10g/m in terms of the basis weight of the temperature sensitive agent²More preferably 0.003 to 5g/m²More preferably 0.01 to 2.5g/m²Further, it is preferably 0.05 to 1.5g/m²The temperature-sensitive solution of (1). This is from the viewpoint of imparting a feeling of warmth to the wearer.

In the temperature sensitive article of the present invention, the temperature sensitive solution may contain at least one other component selected from the following substances within a range not inhibiting the effect of imparting a temperature feeling to the wearer in addition to the temperature sensitive agent and the solvent.

Examples of the at least one other component include a cold feeling agent. Examples of the psychrotolerant include substances that activate TRP channels, and examples of the psychrotolerant include: an agonist for the TRPM8 receptor, an agonist for the TRPA1 receptor, and the like, preferably an agonist for the TRPM8 receptor.

Examples of the cold-sensitive agent include: menthol (e.g., l-menthol) and derivatives thereof (e.g., menthyl lactate, menthol derivatives, and menthol derivatives,

Glycerol ethers, e.g. l-

Glyceryl ether), methyl salicylate, camphor, essential oils derived from plants (e.g., peppermint, eucalyptus), and the like.

The inventor of the application finds that: in the case where the warming solution further contains a cold sensitizer that activates the TRP channel in addition to the warming sensitizer that activates the TRP channel, itching is less likely to be felt in the portion of the wearer that comes into contact with the warming solution and the peripheral portion thereof during the above-described warm sensing time.

In the temperature-sensitive article of the present invention, when the temperature-sensitive solution further contains a cooling agent, the temperature-sensitive solution preferably contains 0.0001 to 5.0 mass%, more preferably 0.0005 to 3.0 mass%, further preferably 0.1 to 1.0 mass%, and further more preferably 0.3 to 0.7 mass% of the cooling agent. This is from the viewpoint that the wearer is less likely to feel itchy during the warm sensing time and is less likely to feel an excessive cold feeling.

In the temperature-sensitive article of the present invention, when the temperature-sensitive solution further contains a cooling agent, the temperature-sensitive solution is preferably mixed in a ratio of 20: 1-1: 10. more preferably in the range of 10: 1-1: 5. furthermore, it is further preferable that the ratio of 2: 1-1: 1 contains the temperature sensitive agent and the cold sensitive agent. This is from the viewpoint that the wearer is less likely to feel itching during the warm feeling time, and is less likely to feel excessive cold feeling and more likely to feel warm feeling.

Examples of the at least one other component include a coolant that lowers the ambient temperature by the heat of vaporization, and examples of the coolant include: alcohols such as methanol and ethanol.

Examples of the at least one other component include: silicone oil, silicone-based resin, and the like.

Examples of the at least one other component include: antioxidants such as BHT (2, 6-di-tert-butyl-p-cresol), BHA (butyl hydroxyanisole), and propyl gallate.

Examples of the at least one other component include: natural vitamins or synthetic vitamins. Examples of the vitamins include: vitamin B₁Vitamin B₂Vitamin B₃Vitamin B₅Vitamin B₆Vitamin B₇Vitamin B₉Vitamin B₁₂And water-soluble vitamins such as B vitamins and vitamin C.

Examples of the vitamins include: fat-soluble vitamins such as A vitamins, D vitamins, E vitamins and K vitamins.

The vitamins mentioned above further include their derivatives.

Examples of the at least one other component include: amino acids such as alanine, arginine, lysine, histidine, proline, hydroxyproline, and peptides.

Examples of the at least one other component include: natural zeolites such as analcime, chabazite, heulandite, natrolite, mordenite and calamine, and zeolites such as synthetic zeolites.

Examples of the at least one other component include: cholesterol, hyaluronic acid, lecithin, ceramide, placenta, collagen, elastin, squalane, vaseline, trehalose, and the like.

Examples of the at least one other component include: skin astringent, acne removing agent, wrinkle resisting agent, cellulite resisting agent, whitening agent, antibacterial agent, and mildew preventing agent.

Examples of the skin astringent include: zinc oxide, aluminum sulfate, tannic acid, etc., and oil-soluble skin astringents such as oil-soluble polyphenols. Examples of the oil-soluble polyphenol include: cortex Phellodendri extract, fructus Rhodomyrti extract, herba Lamii Barbati extract, flos Matricariae Chamomillae extract, Burdock extract, herba Salvia officinalis extract, Tilia miqueliana extract, birch extract, cannabis sativa extract, Salvia petiolata extract, Salvia officinalis extract, walnut shell extract, hibiscus syriacus extract, folium Eriobotryae extract, linden extract, flos Lupuli extract, horse chestnut extract, Coicis semen extract, etc.

Examples of the acne removing agent include: salicylic acid, benzoyl peroxide, resorcinol, sulfur, erythromycin, zinc, and the like.

Examples of the anti-wrinkle agent include: lactic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, lysophosphatidic acid.

Examples of the anti-cellulite agent include: and xanthine compounds such as aminophylline, caffeine, theophylline, and theobromine.

Examples of the whitening agent include: niacinamide, kojic acid, arbutin, glucosamine and derivatives, phytosterol derivatives, ascorbic acid and its derivatives, and mulberry extract and fetal PAN extract.

Examples of the at least one other component include: anti-inflammatory component, pH regulator, antibacterial agent, humectant, perfume, pigment, dye, pigment, plant extract, etc. Examples of the anti-inflammatory component include: peony, Scutellariae radix, fructus Rhodomyrti, flos Chrysanthemi, Glycyrrhrizae radix, folium Persicae, folium Artemisiae Argyi, Perillae herba extract, etc. derived from natural antiinflammatory agent; allantoin, dipotassium glycyrrhizinate, etc.

Examples of the pH adjuster include: malic acid, succinic acid, citric acid, tartaric acid, lactic acid, etc. keep the skin weakly acidic.

Examples of the pigment include titanium oxide.

The temperature sensitive article of the present invention, particularly the temperature sensitive solution, preferably does not contain a heat generating agent. Thus, the wearer is less likely to suffer low temperature burns. Further, since the temperature sensitive article itself does not generate heat, it is difficult to soften the adhesive portion for fixing the temperature sensitive article to the clothing or the skin of the wearer and stop using the temperature sensitive article, and when the temperature sensitive article is taken out from the clothing or the skin of the wearer, the adhesive portion of the temperature sensitive article is not easily left on the clothing or the skin of the wearer.

The heat generating agent is not particularly limited as long as the heat generating agent itself generates heat, and examples thereof include: a heat generating agent utilizing chemical energy, such as the heat of oxidation of metal powder (e.g., iron powder), the heat of neutralization of acid and alkali, and the heat of hydration of inorganic salts.

In the temperature sensitive article of the present invention, the liquid-permeable sheet has liquid permeability, and is not particularly limited as long as it contains a material selected from the group consisting of a heat-generating material, a heat-insulating material, a moisture-absorbing material, and any combination thereof.

Examples of the heat-generating material include: (i) moisture-absorbing heat-generating materials (moisture-absorbing heat-generating fibers, moisture-absorbing heat-generating sheets, etc.), (ii) heat-accumulating materials (heat-accumulating fibers, heat-accumulating sheets, etc.), (iii) far-infrared radiation materials (far-infrared radiation fibers, far-infrared radiation sheets, etc.).

Examples of the hygroscopic exothermic material include: acrylic materials, wool, and the like. Examples of the heat-accumulative material include: a material containing a substance (zirconium carbide or the like) which absorbs sunlight and converts it into heat energy, a carbon material, or the like. Examples of the far infrared ray radiating material include materials containing ceramics that emit far infrared rays when heated.

Examples of the heat insulating material include: hollow fibers, feathers, etc.

Examples of the hygroscopic material include: natural fibers, semi-synthetic fibers, and the like.

Examples of the natural fibers include: pulp fibers and regenerated cellulose fibers. Examples of the regenerated cellulose fibers include: rayon fibers such as viscose rayon obtained from viscose, high tenacity fibers and modal fibers, and cuprammonium rayon fibers (also referred to as "Cupra") obtained from a cuprammonium salt solution of cellulose; lyocell (Lyocell) and Tencel (Tencel) which are obtained by an organic solvent spinning method using an organic solvent which is a mixed solution of an organic compound and water and have not undergone a cellulose derivative.

Examples of the semi-synthetic fibers include: and semi-synthetic cellulose fibers such as acetate fibers including triacetic acid fibers and diacetic acid fibers.

In the temperature sensitive article of the present invention, the liquid-permeable sheet is made of, for example, a fabric (for example, nonwoven fabric, woven fabric, knitted fabric), a perforated film, or the like.

The fabric is preferably a nonwoven fabric from the viewpoint of ease of production of the temperature-sensitive article. Examples of the nonwoven fabric include: dry-laid pulp (Air-laid pulp), Air-through nonwoven, spunbond nonwoven, point-bonded nonwoven, spunlace nonwoven, needle-punched nonwoven, meltblown nonwoven, combinations thereof (e.g., SMS, etc.), and the like.

In the temperature-sensitive article of the present invention, when the liquid-permeable sheet is a fabric, the fabric may contain synthetic fibers in addition to the heat-generating material, the heat-insulating material, and the moisture-absorbing material.

Examples of the synthetic fibers include: hot-melt adhesive fibers such as polyolefin polymers such as polyethylene or polypropylene; polyester polymers such as terephthalate polymers including polyethylene terephthalate (PET), polybutylene terephthalate, and polybutylene terephthalate; polyamide polymers such as nylon 6 and nylon 6, 6; an acrylic polymer; a polyacrylonitrile-based polymer; or a modified form thereof, or a fiber formed from a combination thereof or the like.

When the temperature sensitive article of the present invention is provided with an on demand performance, the liquid-permeable sheet may have hydrophilicity or lipophilicity. The liquid-permeable sheet having hydrophilicity may be formed by: the material constituting the liquid-permeable sheet is treated with a hydrophilizing agent known in the art (for example, coating with a hydrophilizing agent, kneading with a hydrophilizing agent). Examples of the hydrophilizing agent include: alkyl phosphate ester salts, alkyl phosphate metal salts, and the like. Examples of the hydrophilizing agent include: alkyl phosphate with 10-30 carbon atoms, betaine compound with 10-30 carbon atoms, mixture of sulfate or sulfonate, mixture of alkyl phosphate and polyether modified organic silicon, etc. By adjusting the polarity (lipophilicity and hydrophilicity) between the liquid-permeable sheet and the intermediate sheet, the temperature-sensitive article can be provided with desired performance.

The inventor of the application finds that: a temperature-sensitive article containing a temperature-sensitive agent tends to have a longer warm sensing time than a heat-generating article containing a heat-generating agent (e.g., iron powder); in addition, a temperature sensitive article containing a temperature sensitive agent may have a different temperature sensitive feel depending on the state of the skin of the wearer (for example, dryness of the skin of the wearer) as compared with a heat emitting article containing a heat emitting agent (for example, iron powder). For example, in the case where the skin of the wearer is wet with moisture, the skin of the wearer is likely to be kept in a state where the stratum corneum is mainly swollen, and a temperature-sensitive solution is likely to reach TRP channels mainly present in keratinocytes (keratinocytes), so that a temperature sensation is likely to be sensed (the time for sensing warmth is short) as compared with the case where the skin of the wearer is dry.

Therefore, by providing the temperature sensitive article of the present invention with the on-demand performance, the wearer can release the temperature sensitive solution from the temperature sensitive region by pressing the portion overlapping with the temperature sensitive region of the temperature sensitive article in the thickness direction of the temperature sensitive article, and the temperature sensitive solution passing through the liquid permeable sheet reaches the skin of the wearer.

The liquid-permeable sheet having lipophilicity can be formed as follows: the material constituting the liquid-permeable sheet is treated with a lipophilic agent known in the art (for example, coating with the lipophilic agent, kneading with the lipophilic agent). Examples of the oleophilic agent include: fatty acid esters (e.g., triglycerides), hydrocarbons (e.g., linear hydrocarbons).

When the liquid-permeable sheet of the temperature-sensitive article of the present invention is a fabric, the liquid-permeable sheet preferably has a thickness of 0.005 to 0.060g/cm when the temperature-sensitive article of the present invention is provided with an optional performance³More preferably 0.010 to 0.050g/cm³And further preferably 0.020 to 0.040g/cm³The fiber density of (a). By adjusting the fiber density between the liquid-permeable sheet and the intermediate sheet, the temperature-sensitive article can have desired performance.

The method of measuring the fiber density is described below.

When the liquid-permeable sheet of the temperature-sensitive article of the present invention is a fabric and when the temperature-sensitive article of the present invention is provided with performance as required, the liquid-permeable sheet is 30g/cm²Has a thickness under load of 3g/cm²The thickness under load is preferably 70% or less, more preferably 60% or less, and further preferably 50% or less. Thus, when the wearer presses the temperature sensitive article in the thickness direction, the liquid-permeable sheet is easily crushed, and the temperature sensitive solution held by the liquid-permeable sheet is easily brought into contact with the skin of the wearer, thereby improving the performance of the temperature sensitive article as required.

When the liquid-permeable sheet of the temperature-sensitive article of the present invention is a fabric and when the temperature-sensitive article of the present invention is provided with performance as required, the liquid-permeable sheet is 10g/cm²Has a thickness under load of 3g/cm²The thickness under load is preferably 70% or more, more preferably 80% or more, and further preferably 90% or more. Thus, the liquid-permeable sheet is less likely to be crushed when pressure is applied to the clothing or the like being worn, and the temperature-sensitive solution held by the liquid-permeable sheet is less likely to contact the skin of the wearer when pressure is applied, thereby facilitating improvement of the performance of the temperature-sensitive article as required.

In the present specification, the concentration of the compound is measured at 30g/cm in the following manner²、10g/cm²And 3g/cm²Thickness under load.

(1) At the temperature: 20 ± 5 ℃ and humidity: FS-60DS, manufactured by Kabushiki Seisakusho K.K., 65. + -. 5% RH, was prepared in a constant temperature and humidity chamber, and the liquid-permeable sheet (hereinafter referred to as "sample") was left to stand in the same constant temperature and humidity chamber for 24 hours.

(2) The thickness of the sample at 10 was measured by changing the position, and the average value of these was used as the thickness of the sample.

The load is adjusted by changing the stator. Under the condition of load: 3g/cm²Using the diameter: 44mm stator, under load: 10g/cm²Using the diameter: 25mm of an analyzer, and further under a load: 30g/cm²Using the diameter: 14mm stator.

The liquid-permeable sheet preferably has a thickness of 10 to 100g/m²And further preferably 20 to 50g/m²Basis weight of (c).

In the temperature sensitive article of the present invention, the material of the liquid-impermeable sheet is not particularly limited as long as it has liquid impermeability, and examples thereof include: a moisture-permeable film made of polyethylene, polypropylene, or the like, a film such as a non-moisture-permeable film, a nonwoven fabric such as a spunbond or spunlace bonded with a moisture-permeable film, a multi-layer nonwoven fabric such as SMS, or the like.

The liquid-impermeable sheet may further contain the predetermined functional material. This is from the viewpoint of shortening the time until the wearer feels a sensation of warmth.

In the temperature sensitive article of the present invention, the liquid-impermeable sheet is preferably composed of a moisture-impermeable film. Thus, moisture, water vapor, and the like present in the temperature sensitive region and the skin of the wearer in contact with the temperature sensitive region are not easily discharged to the outside of the temperature sensitive article through the liquid impermeable sheet, and it is easy to maintain the state in which the skin of the wearer is mainly swollen with moisture, and the temperature sensitive solution easily reaches the TRP channel mainly present in keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

The liquid-impermeable sheet preferably has a thickness of 10 to 50g/m²And further preferably 15 to 30g/m²Basis weight of (c).

The temperature sensitive article of the present invention may include an additional member such as an intermediate sheet (for example, a temperature sensitive solution-retaining sheet) or an absorbent body between the liquid-permeable sheet and the liquid-impermeable sheet.

The intermediate sheet may be composed of the materials listed as the liquid-permeable sheet. The intermediate sheet may further contain the predetermined functional material. This is from the viewpoint of shortening the time for which the wearer feels a warmth.

The intermediate sheet may contain a temperature-sensitive solution, that is, may be a temperature-sensitive solution holding sheet, or may not contain a temperature-sensitive solution. When the intermediate sheet is used as the temperature-sensitive solution holding sheet and the solvent of the temperature-sensitive solution is an oleophilic solvent, the intermediate sheet may be a fabric made of synthetic fibers, such as a nonwoven fabric, a woven fabric, or a knitted fabric, or may be a nonwoven fabric made of synthetic fibers, for example. When the intermediate sheet is used as the temperature-sensitive solution holding sheet and the solvent of the temperature-sensitive solution is a hydrophilic solvent, the intermediate sheet may be a fabric made of cellulose fibers such as a nonwoven fabric, a woven fabric, or a knitted fabric, or a tissue made of pulp fibers such as dry-laid pulp (Air-laid pulp).

When the temperature-sensitive article of the present invention has the following features [ (i) further comprises an intermediate sheet, and (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region) ], the intermediate sheet may have hydrophilicity or lipophilicity when a desired performance is imparted to the temperature-sensitive article. The intermediate sheet having hydrophilicity may be formed by: the material constituting the intermediate sheet is treated with a hydrophilizing agent known in the art (for example, coating with a hydrophilizing agent, kneading with a hydrophilizing agent). The hydrophilizing agent may be one as described in the description of the liquid-permeable sheet. By adjusting the polarity (lipophilicity and hydrophilicity) between the liquid-permeable sheet and the intermediate sheet, the temperature-sensitive article can be provided with desired performance.

As the intermediate sheet having lipophilicity, it can be formed by: the material constituting the intermediate sheet is treated with a lipophilic agent known in the art (e.g., coating with the lipophilic agent, kneading with the lipophilic agent). Examples of the lipophilic agents include those listed in the description of the liquid-permeable sheet.

The temperature-sensitive article of the present invention has the following feature [ (i) furtherHas an intermediate sheet, and (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region)]When the intermediate sheet is used for imparting the required performance to the temperature-sensitive article, the intermediate sheet preferably has a thickness of 0.010 to 0.500g/cm³More preferably 0.020 to 0.300g/cm³And further preferably 0.030 to 0.100g/cm³The fiber density of (a).

The intermediate sheet preferably has a thickness of 10 to 200g/m²And further preferably 15 to 150g/m²Basis weight of (c).

The temperature sensitive article of the present invention has the following features [ (i) further comprising an intermediate sheet; (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region); and (iii) the liquid-permeable sheet is a fabric]In the case of imparting the required performance to the temperature sensitive article, the liquid-permeable sheet is preferably set to 0.005g/cm³Above, more preferably at 0.010g/cm³Above and more preferably at 0.015g/cm³Above and more preferably at 0.020g/cm³More preferably 0.025g/cm or more³Above, still more preferably 0.030g/cm³The above difference is less than the fiber density of the center sheet. Thus, the temperature-sensitive solution is easily held in the temperature-sensitive body having a high fiber density in a state where no force or the like is applied, and when the wearer presses the temperature-sensitive article, the temperature-sensitive solution moves to the liquid-permeable sheet and then easily moves to the skin of the wearer.

The temperature sensitive article of the present invention has the following features [ (i) further comprising an intermediate sheet; (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region); and (iii) the liquid-permeable sheet is a fabric]In the case of imparting the required performance to the temperature sensitive article, the liquid-permeable sheet preferably has a thickness of 0.440g/cm³The concentration is preferably 0.300g/cm or less³The concentration of the surfactant is preferably 0.250g/cm³The concentration of the surfactant is preferably 0.200g/cm³The concentration is preferably 0.150g/cm or less³The concentration of the surfactant is preferably 0.100g/cm³The amount of the surfactant is preferably 0.060g/cm³Hereinafter, more preferably 0.045g/cm³The lower, more preferably 0.040g/cm³The amount of the surfactant is preferably 0.035g/cm³The following differences are less than the fiber density of the center sheet. From this, wearWhen the wearer presses the temperature sensitive article, the temperature sensitive solution moves to the liquid permeable sheet and then easily moves to the skin of the wearer.

The fiber density of the liquid-permeable sheet and the intermediate sheet can be measured in the following manner.

(1) At the temperature: 20 ± 5 ℃ and humidity: in a constant temperature and humidity chamber with 65. + -. 5% RH, FS-60DS (measuring surface 44mm (diameter)) manufactured by Kabushiki Kaisha K.K., was prepared, and the pressure was measured at 3g/cm²]The liquid-permeable sheet and/or the intermediate sheet (hereinafter referred to as "sample") was left standing for 24 hours in the same constant temperature and humidity chamber.

(2) 10 pieces of sample pieces 0.1m × 0.1m in size were collected from the above samples.

(3) The mass of each sample piece was measured and then determined by dividing the mass (g) of each sample piece by the area (m) of each sample piece²) Thus, the basis weight of each sample piece was calculated: bw (g/m)²)。

(4) The thickness of each sample piece after being pressed for 10 seconds was measured by applying pressure to 5 different portions of each sample piece using FS-60DS, and the average of the 5 measured values was defined as the thickness of each sample piece: t (m).

(5) In each sample piece, the weight ratio of the sample piece was calculated by: bw (g/m)²) Divided by the thickness of the sample piece: t (m) and the units are adjusted to calculate the fiber density of each sample piece: fd (g/cm)³)。

(6) The fiber density of a total of 10 sample pieces was calculated: fd (g/cm)³) Taking the average as the fiber density: FD (g/cm)³) To be utilized.

The temperature sensitive article of the present invention has the following features [ (i) further comprising an intermediate sheet; (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region); and (iii) the solvent of the temperature sensitive solution is a lipophilic solvent ], the intermediate sheet preferably has a higher lipophilicity than the liquid-permeable sheet when imparting the temperature sensitive article with the desired performance.

Thus, the temperature-sensitive solution containing the lipophilic solvent is more likely to be present in the intermediate sheet constituting the temperature-sensitive region than the liquid-permeable sheet, and when the wearer presses the temperature-sensitive article, the temperature-sensitive solution is released from the intermediate sheet (temperature-sensitive region) and moves to the liquid-permeable sheet, and the temperature-sensitive solution passing through the liquid-permeable sheet reaches the skin of the wearer, thereby imparting a temperature sensation to the wearer. When the wearer stops pressing the temperature-sensitive article, the temperature-sensitive solution that has reached the skin of the wearer is gradually returned to the intermediate sheet (temperature-sensitive region) by the difference between the lipophilicity of the intermediate sheet and the lipophilicity of the liquid-permeable sheet. Therefore, the wearer can control the temperature more easily, and the required performance of the temperature-sensitive article is more excellent.

The temperature-sensitive article of the present invention has the following features [ (i) further comprising an intermediate sheet; (ii) the intermediate sheet constitutes a temperature-sensitive solution holding sheet (temperature-sensitive region); and (iii) the solvent of the temperature-sensitive solution is a hydrophilic solvent ], the degree of hydrophilicity of the intermediate sheet is preferably higher than that of the liquid-permeable sheet in imparting the performance as required to the temperature-sensitive article. This is from the viewpoint of improving the on-demand performance of the temperature sensitive article.

Thus, the temperature-sensitive solution containing the hydrophilic solvent is more likely to be present in the intermediate sheet constituting the temperature-sensitive region than the liquid-permeable sheet, and when the wearer presses the temperature-sensitive article, the temperature-sensitive solution is released from the intermediate sheet (temperature-sensitive region), moves to the liquid-permeable sheet, and reaches the skin of the wearer through the temperature-sensitive solution in the liquid-permeable sheet, thereby imparting a temperature sensation to the wearer. When the wearer stops pressing the temperature sensitive article, the temperature sensitive solution reaching the skin of the wearer is gradually returned to the intermediate sheet (temperature sensitive region) by the difference between the hydrophilicity of the intermediate sheet and the hydrophilicity of the liquid permeable sheet. Therefore, the wearer can control the temperature more easily, and the required performance of the temperature-sensitive article is more excellent.

The level of lipophilicity and the level of hydrophilicity can be evaluated in the following manner.

(1) At the temperature: 20 ± 5 ℃ and humidity: in a constant temperature and humidity chamber of 65. + -. 5% RH, an automatic contact angle measuring instrument MCA-J of Kyowa interface chemical Co., Ltd was prepared, and the liquid-permeable sheet and the intermediate sheet (hereinafter referred to as "sample") were left to stand in the same constant temperature and humidity chamber for 24 hours.

(2) Minute droplets (20pL) of deionized water were dropped from an MCA-J ink jet onto the surface of a sample to be measured (the surface of a fiber when the sample was a fabric, and the surface of a sheet when the sample was a sheet), and the state of the minute droplets was photographed with time.

(3) The image of the sample immediately after the droplet was attached to the surface was analyzed, and the contact angle of the droplet with respect to the sample surface was calculated.

(4) The contact angle was averaged over 20 total measurements for the different 20 fibers.

(5) A sample with a large contact angle was used as a sample with high lipophilicity (sample with low hydrophilicity), and a sample with a small contact angle was used as a sample with low lipophilicity (sample with high hydrophilicity).

Examples of the absorbent include: a core wrap covering the pulp fibers and the absorbent core containing the polymeric absorbent; the core wrap covers an absorbent core containing a polymeric absorbent or an absorbent core made of a polymeric absorbent. The core wrap may be the intermediate sheet. Examples of the temperature sensitive article provided with the absorber include absorbent articles.

Examples of the polymeric absorbent include: high-absorbency polymers such as polyacrylate, polysulfonate, maleic anhydride, polyacrylamide, polyvinyl alcohol, polyethylene oxide, polyaspartate, polyglutamate, polyacronate, starch, and cellulose; starch-based or cellulose-based super absorbent polymers such as starch-acrylic acid (salt) graft copolymers, saponified products of starch-acrylonitrile copolymers, and crosslinked products of sodium carboxymethyl cellulose.

The temperature sensitive article of the present invention preferably does not contain a polymer absorbent at a position overlapping with the temperature sensitive region in the thickness direction of the temperature sensitive article. Thus, moisture, water vapor, and the like present in the temperature-sensitive region and the skin of the wearer in contact with the temperature-sensitive region are not easily absorbed into the absorbent polymer, and it is easy to maintain the state in which the skin of the wearer is swollen mainly with moisture, and the temperature-sensitive solution easily reaches the TRP channel present mainly in keratinocytes (keratinocytes). As a result, the warm feeling time is shortened, and the wearer is less likely to feel itchy during the warm feeling time.

The temperature sensitive article of the present invention may include an adhesive portion for fixing the temperature sensitive article to clothes, skin of a wearer, and the like, and examples of the adhesive portion include a hot-melt adhesive, and include: pressure-sensitive adhesives or heat-sensitive adhesives based on rubber systems such as styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS) or styrene-isoprene-styrene (SIS), or based on olefin systems such as linear low-density polyethylene; and water-sensitive adhesives comprising a water-soluble polymer (e.g., polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or a water-swellable polymer (e.g., polyvinyl acetate, sodium polyacrylate, etc.).

The temperature-sensitive article of the present invention is preferably packaged with a packaging sheet before use. This is from the viewpoint of protecting the temperature-sensitive solution held by the temperature-sensitive article, from the viewpoint of preventing the temperature-sensitive solution held by the temperature-sensitive article from leaking to the outside, and the like. For example, the temperature sensitive article of the present invention is preferably a package in which one or more temperature sensitive articles are packaged in a package sheet, and more preferably an independent package in which one temperature sensitive article is packaged in a package sheet.

Examples of the material of the packaging sheet include: polyolefin polymers such as polyethylene and polypropylene. From the viewpoint of improving the airtightness of the individual package, the package sheet may include an inner liner, and examples of the material of the inner liner include: ethylene vinyl alcohol copolymers; polyvinylidene chloride polymers such as vinylidene chloride methacrylate copolymers; polyvinyl alcohol; nylons such as nylon 6; aluminum foil; a base film (such as polyethylene terephthalate) is vapor-deposited with a substance such as alumina or silica.

The temperature-sensitive article of the present invention is not particularly limited as long as it has a temperature-sensitive region containing a temperature-sensitive solution, and examples thereof include an absorbent article and a temperature-sensitive sheet.

The absorbent article is not particularly limited, and examples thereof include: absorbent materials such as sanitary napkins, pants-type sanitary napkins, pantiliners, disposable diapers, incontinence pads, interlabial pads, tampons, mattress pads, breast pads, hemorrhoid pads, sweat pads, bedsore sheets (dressing sheets), pet diapers, and pet sheets.

In the absorbent article, the temperature sensitive region containing the temperature sensitive solution may be disposed at the following positions in the planar direction of the absorbent article: a position not overlapping the absorber in the thickness direction of the absorbent article, a position of any combination thereof, and the like. In the absorbent article, the temperature-sensitive region containing the temperature-sensitive solution may be disposed in the liquid-permeable sheet, the intermediate sheet, the absorbent body, any combination thereof, or the like, along the thickness direction of the absorbent article.

The absorbent article generally includes a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body between the liquid-permeable sheet and the liquid-impermeable sheet.

The temperature-sensitive solution may move on or in the material constituting the absorbent article, and a part of the material adjacent to the material in which the temperature-sensitive solution is disposed may form a temperature-sensitive region. For example, when the temperature-sensitive solution is disposed in the intermediate sheet and the liquid-permeable sheet is made of a fabric, there are cases such as: a part of the temperature sensitive solution moves mainly in the thickness direction of the absorbent article to the region on the center sheet side of the adjacent liquid-permeable sheet, and a temperature sensitive region is formed in the region on the center sheet side of the liquid-permeable sheet. When the temperature-sensitive solution is disposed in the liquid-permeable sheet, for example, the following are cases: a part of the temperature sensitive solution moves mainly in the thickness direction of the absorbent article to the liquid-permeable sheet-side region of the adjacent intermediate sheet or the liquid-permeable sheet-side region of the adjacent absorbent body, thereby forming a temperature sensitive region in the liquid-permeable sheet-side region of the intermediate sheet or the liquid-permeable sheet-side region of the absorbent body.

The temperature-sensitive article of the present invention has the following features [ (i) the temperature-sensitive article is an absorbent article provided with an absorber; (ii) the temperature-sensitive region is disposed at a position not overlapping the absorber in the thickness direction of the absorbent article; and (iii) when the temperature sensitive article is folded in the longitudinal direction by the width direction folding axis extending in the width direction of the absorbent article ], it is preferable that the width direction folding axis is disposed so as to overlap the temperature sensitive region in the thickness direction of the temperature sensitive article in the unfolded state of the temperature sensitive article.

When the widthwise folding axes are arranged so as to overlap the temperature-sensitive region in the thickness direction in the developed state of the temperature-sensitive article, the material density of the widthwise folding axis overlapping portion, which is the portion of the temperature-sensitive region overlapping the widthwise folding axes, is higher than the material density of the widthwise folding axis non-overlapping portion, which is the temperature-sensitive region, and therefore the amount (basis weight) of the temperature-sensitive solution in the widthwise folding axis overlapping portion tends to be larger than the amount (basis weight) of the temperature-sensitive solution in the widthwise folding axis non-overlapping portion.

Therefore, when the temperature sensitive region is disposed at a position corresponding to the lower abdomen of the wearer, the overlapping portion of the width direction folding axis of the temperature sensitive region can impart a temperature to the pelvic internal lymph node (internal iliac lymph node, closed lymph node, external iliac lymph node, anterior sacral lymph node, total iliac lymph node, cardinal ligament lymph node, sacral lymph node, inguinal upper lymph node, periaortic lymph node, etc.) and inguinal lymph node (inguinal shallow lymph node, inguinal deep lymph node, etc.) of the wearer, and increase the temperature of these lymph nodes, thereby being expected to impart a massage effect.

The temperature-sensitive article of the present invention has the following features [ (i) the temperature-sensitive article is an absorbent article provided with an absorber; (ii) the temperature-sensitive region is disposed at a position not overlapping the absorber in the thickness direction of the absorbent article; and (iii) when the temperature sensitive article is folded in the width direction by the longitudinal folding axis extending in the longitudinal direction of the absorbent article ], it is preferable that the longitudinal folding axis is disposed so as to overlap the temperature sensitive region along the thickness of the temperature sensitive article in the unfolded state of the temperature sensitive article.

When the longitudinal folding axes are arranged so as to overlap the temperature-sensitive region in the thickness direction in the developed state of the temperature-sensitive article, the material density of the portion overlapping the longitudinal folding axes as the temperature-sensitive region, that is, the material density of the portion overlapping the longitudinal folding axes as the temperature-sensitive region is higher than the material density of the portion not overlapping the longitudinal folding axes as the temperature-sensitive region, and therefore, the amount (basis weight) of the temperature-sensitive solution in the portion overlapping the longitudinal folding axes tends to be larger than the amount (basis weight) of the temperature-sensitive solution in the portion not overlapping the longitudinal folding axes.

Therefore, when the temperature sensitive region is disposed at a position corresponding to the lower abdomen of the wearer, the overlapping portion of the longitudinal folding axis of the temperature sensitive region can impart a temperature to the pelvic lymph nodes (internal iliac lymph node, closed lymph node, external iliac lymph node, anterior sacral lymph node, total iliac lymph node, cardinal ligament lymph node, sacral lymph node, inguinal upper lymph node, periaortic lymph node, and the like) and inguinal lymph nodes (superficial inguinal lymph node, deep inguinal lymph node, and the like) of the wearer, and increase the temperature of these lymph nodes, thereby providing a massage effect.

Examples of the temperature-sensitive sheet include: a temperature sensitive sheet of a clothing-fixing type to be worn (for example, a liquid-impermeable sheet-wearing clothing contact mask is provided with an adhesive part for fixing to clothing to be worn by a wearer, and the adhesive part is adhered to an inner surface of the clothing to be worn); a skin-fixing type temperature-sensitive sheet (for example, a liquid-permeable sheet having a skin-contacting surface (for example, an edge of the temperature-sensitive sheet) provided with an adhesive portion for fixing to the skin of a wearer, and the adhesive portion being for adhering to the skin of the wearer).

The clothing to be worn, which can fix the clothing-fixing type temperature-sensitive sheet to be worn, is not particularly limited, and examples thereof include: has a portion that directly contacts the skin of the wearer, preferably a substance that can be worn on the wearer. Examples of the clothing to be worn include: intimate apparel (e.g., shorts, shirts, bras, etc.), outerwear (e.g., jacket, under coat), socks, gloves, scarves, face masks, eye masks, and the like.

The site to which the temperature-sensitive sheet can impart a temperature-sensitive property is not particularly limited, and examples thereof include: head (e.g., face, e.g., eyes), neck, upper limb (e.g., chest, abdomen, groin, mid-back, waist, upper wrist, anterior wrist, hands), lower limb (e.g., thigh, calf, feet), etc.

In the temperature-sensitive sheet, a temperature-sensitive region containing a temperature-sensitive solution may be disposed in the liquid-permeable sheet, the intermediate sheet, or the like.

In the above-mentioned temperature-sensitive sheet, the temperature-sensitive region containing the temperature-sensitive solution may be arranged on the entire surface, the central portion, the edge portion, or any combination thereof in the planar direction of the temperature-sensitive sheet. In the temperature-sensitive sheet, the temperature-sensitive region containing the temperature-sensitive solution may be disposed in the liquid-permeable sheet, the intermediate sheet, or any combination thereof in the thickness direction of the temperature-sensitive sheet.

The temperature-sensitive sheet is generally provided with at least a liquid-impermeable sheet and a liquid-permeable sheet.

When the temperature-sensitive solution moves on or in the material constituting the temperature-sensitive sheet, a portion of the material adjacent to the material in which the temperature-sensitive solution is disposed may form a temperature-sensitive region. For example, when the temperature sensitive solution is disposed in the center sheet, and the liquid-permeable sheet is made of a fabric, a part of the temperature sensitive solution may move mainly in the thickness direction of the absorbent article toward the center sheet side region of the adjacent liquid-permeable sheet, for example, and a temperature sensitive region may be formed in the center sheet side region of the liquid-permeable sheet. In addition, in the case where the temperature sensitive solution is disposed in the liquid-permeable sheet, a part of the temperature sensitive solution moves to the liquid-permeable sheet side region of the adjacent intermediate sheet mainly in the thickness direction of the absorbent article, for example, whereby the liquid-permeable sheet side region of the intermediate sheet forms a temperature sensitive region.

Examples

The present invention will be described below by way of examples, but the present invention is not limited to these examples.

Production example 1

As a temperature sensitive article, a sanitary napkin No.1 according to embodiment 1 was produced. The liquid-permeable sheet in the absorption body and the temperature-sensitive body is a breathable nonwoven fabric (basis weight: 30 g/m)²) The heat-absorbent fibers contained 80 mass% of the hot-melt adhesive fibers and 20 mass% of the heat-absorbent fibers (MOISCARE, Toyobo Co., Ltd.), and were disposed on the skin-contact surface side.

The heat-sensitive solution retaining sheet was made by dry-process paper (Air-laid pulp) (basis weight: 60 g/m)²) The basis weight of the temperature-sensitive agent is 1.0g/m²The temperature-sensitive solution is applied in a quantitative manner. The temperature-sensitive solution is prepared from herb Hierochloes Adoratae as temperature-sensitive agentA base ether (10.0 mass%) and isononyl isononanoate as a solvent. The liquid-impermeable sheet is a polyethylene-made moisture-impermeable film (basis weight: 24 g/m)²)。

Production example 2

Will constitute a breathable nonwoven fabric (basis weight: 30 g/m)²) A sanitary napkin No.2 was produced in the same manner as in production example 1, except that the fibers in (b) were changed to 50 mass% of the same thermal adhesive fibers and 50 mass% of hollow fibers (manufactured by toyobo) as the heat insulating fibers as in production example 1.

Production example 3

The liquid-permeable sheet was composed of a breathable nonwoven fabric (basis weight: 30 g/m)²) A spunlace nonwoven fabric (basis weight: 30g/m²) Except for this, a sanitary napkin No.3 was produced in the same manner as in production example 1.

Production example 4

As a temperature sensitive article, temperature sensitive sheet No.1 according to embodiment 4 was manufactured. The liquid-permeable sheet was a breathable nonwoven fabric (basis weight: 30 g/m)²) The heat-and moisture-absorbing fiber is disposed on the skin contact surface side, and contains 50 mass% of a heat-fusible fiber and 50 mass% of a hollow fiber (manufactured by Toyo Co., Ltd.) as a heat-insulating fiber.

The heat-sensitive solution retaining sheet was made by dry-process paper making (Air-laid pulp) (basis weight: 100 g/m)²) The basis weight of the temperature-sensitive agent is 1.0g/m²The temperature-sensitive solution is applied in a quantitative manner. The temperature-sensitive solution was composed of vanillyl butyl ether (0.3 mass%) as a temperature-sensitive agent, a surfactant (1.2 mass%), and water as a solvent. The liquid-impermeable sheet is a polyethylene-made moisture-impermeable film (basis weight: 24 g/m)²)。

Production example 5

A breathable nonwoven fabric (basis weight: 30 g/m) was formed from 100% by mass of a hot-melt adhesive fiber²) Except for this, a sanitary napkin No.4 was produced in the same manner as in production example 1.

Production example 6

A breathable nonwoven fabric (basis weight: 30 g/m) was formed from 100% by mass of a hot-melt adhesive fiber²) Except for this, temperature-sensitive sheet No.2 was produced in the same manner as in production example 1.

Examples 1 to 4 and comparative examples 1 and 2

The degrees of feeling of warmth were evaluated by 5 evaluation values of the following 1 to 5, each of which was put on the sanitary napkins nos. 1 to 4 and the warming sheets nos. 1 and 2. The results (average values rounded off and integer values) are shown in table 1.

5: the feeling of warmth was felt within 5 minutes after wearing.

4: the feeling of warmth was felt more than 5 minutes and within 15 minutes after wearing.

3: the feeling of warmth was felt more than 15 minutes and within 30 minutes after wearing.

2: the feeling of warmth was felt more than 30 minutes and within 60 minutes after wearing.

1: a warm sensation was felt more than 60 minutes after wearing.

Further, the degree of itching hardly felt within 2 hours after wearing was evaluated by the following evaluation values of 5 ranks of 1 to 5. The results (average values rounded off and integer values) are shown in table 1.

5: no itching was felt.

4: little itching was felt.

3: itching was felt slightly.

2: itching was felt to a tolerable degree.

1: an intolerable degree of itching is felt.

[ Table 1]

Claims

1. A temperature-sensitive article comprising a liquid-permeable sheet and a liquid-impermeable sheet,

the temperature-sensitive article has a temperature-sensitive region containing a temperature-sensitive solution containing a temperature-sensitive agent that activates a TRP channel and a solvent,

the liquid-permeable sheet contains at least one material selected from the group consisting of a heat-generating material and a heat-insulating material.

2. The temperature-sensitive article according to claim 1, wherein the temperature-sensitive article is an absorbent article further comprising an absorber, the absorber being between the liquid-permeable sheet and the non-liquid-permeable sheet, and having a thickness direction and a width direction, and the temperature-sensitive solution is disposed at a position not overlapping with the absorber in the thickness direction.

3. The temperature-sensitive article according to claim 2, wherein the temperature-sensitive region is disposed in a region that corresponds to a lower abdomen of the wearer and is wider than the absorber in the width direction.

4. The temperature-sensitive article according to claim 3, wherein the temperature-sensitive article is folded in a longitudinal direction by a width-direction folding axis extending in the width direction, the width-direction folding axis being arranged so as to overlap with the temperature-sensitive region in the thickness direction in an expanded state of the temperature-sensitive article.

5. The temperature-sensitive article according to claim 3 or 4, wherein the temperature-sensitive article is folded in the width direction by a pair of longitudinal folding axes extending in the longitudinal direction, and the pair of longitudinal folding axes are arranged so as to be located further outside in the width direction than the absorber and overlap the temperature-sensitive region in the thickness direction in the expanded state of the temperature-sensitive article.

6. The temperature-sensitive article according to claim 2 or 3, wherein the solvent is a lipophilic solvent.

7. The temperature-sensitive article according to claim 2 or 3, wherein the temperature-sensitive article does not contain a polymeric absorbent at a position overlapping with the temperature-sensitive region in the thickness direction.

8. The temperature-sensitive article according to claim 2 or 3, wherein the absorbent article is selected from the group consisting of a sanitary napkin, a pants-type sanitary napkin, and a disposable diaper.

9. The temperature-sensitive article according to claim 1 or 2, wherein the liquid-impermeable sheet is composed of a moisture-impermeable film.

10. The temperature-sensitive article of claim 1 or 2, wherein the temperature-sensitive agent is an agonist to the TRPV1 receptor.