KR20210000175U - Absorbent article - Google Patents

Abstract

[Task] To provide an absorbent article that reduces the likelihood that the volatile components of the cooling agent or the warming agent escape to the outside.
[Solution] The absorbent article 1 includes: a top sheet 3; Back sheet 5; An absorbent core 10 disposed between the top sheet 3 and the back sheet 5; A pair of leak-preventing walls 7 extending in the front-rear direction on both sides of the absorbent core 10 in the width direction as viewed in the thickness direction; And any one of a cooling agent and a warming agent. Each leak-preventing wall 7 includes an elastic member 6 that expands and contracts in the front-rear direction, and is able to stand on the skin side in the thickness direction. The elastic member 6 includes an elastic portion 6a that exhibits elasticity in the front-rear direction. The absorbent core 10 includes a low basis weight portion 50, and in the low basis weight portion 50, the basis weight of the absorbent core 10 is lower than the basis weight of the absorbent core 10 around the low basis weight portion 50. The low basis weight portion 50 extends at least in the width direction, and is provided at a position overlapping the elastic member 6 in the front-rear direction. Any one of the cooling agent and the warming agent is applied so as to overlap at least the low basis weight portion as viewed in the thickness direction.

Description

Absorbent article {ABSORBENT ARTICLE}

The present invention relates to an absorbent article.

Examples of absorbent articles include sanitary napkins, panty liners, and absorbent pads. For example, Patent Literature 1 discloses that the volatile component of the cooling agent is transferred to the skin due to the movement of air resulting from deforming the absorbent layer around the slit portion that contains a coolant that makes the wearer comfortable and acts as a segmented portion disposed on the absorbent layer. An absorbent article that makes it easy to contact is disclosed.

[Patent Document 1] Japanese Patent No. 6482736

However, as in Patent Document 1, even if a slit portion is provided in the absorbent layer to cause movement of air toward the skin, when the absorbent article is not sufficiently in close contact with the body, or when the absorbent article is in a form that is difficult to follow the movement of the wearer, the absorbent layer The volatile components of the pushed coolant may escape due to the deformation of

The present invention has been achieved in view of the conventional problems as described above, and an aspect of the present invention is to provide an absorbent article that reduces the likelihood that the volatile component of the cooling agent or the warming agent escapes to the outside.

The main aspect of the present invention for achieving the above-described aspect is an absorbent article having a front-rear direction, a width direction and a thickness direction intersecting each other,

The absorbent article

Liquid permeable surface sheet;

Liquid impermeable back sheet;

As a liquid-absorbing absorbent core disposed between the top sheet and the back sheet,

The absorbent core includes a low basis weight portion, and the basis weight of the absorbent core in the low basis weight portion is lower than the basis weight of the absorbent core around the low basis weight portion,

The low basis weight portion extends at least in the width direction,

A liquid-absorbing absorbent core provided at a position where the low basis weight portion overlaps the elastic member in the front-rear direction;

As viewed from the thickness direction, as a pair of leakage preventing walls extending in the front-rear direction on both sides of the absorbent core in the width direction,

Each leakage preventing wall includes an elastic member that expands and contracts in the front-rear direction,

Each leak-proof wall is capable of standing toward the skin side in the thickness direction,

The elastic member may include a leakage preventing wall including an elastic portion expressing elasticity in the front-rear direction; And

Any one of a cooling agent and a warming agent applied so as to overlap at least with the low basis weight when viewed in the thickness direction

It is an absorbent article containing.

Other features of the present invention other than the above will become apparent upon reading the description of the present specification with reference to the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article that reduces the likelihood that the volatile component of the cooling agent or the warming agent escapes to the outside.

1 is a schematic plan view of the sanitary napkin 1 in an elongated state in a first embodiment as viewed from the skin side.
2 is a schematic plan view of the sanitary napkin 1 in an elongated state in the first embodiment as viewed from the non-skin side.
Fig. 3A is a schematic cross-sectional view along line AA in Fig. 1, and Fig. 3B is a schematic cross-sectional view showing the leak-proof wall 7.
4 is a schematic cross-sectional view showing the linear compression portion 40 and the low basis weight portion 50 of FIG. 3.
5 shows an application area to which a cooling agent or a warming agent is applied.
6 is a schematic plan view of the sanitary napkin 1 in an elongated state including the packaging material 60 in the first embodiment as viewed from the skin side.
7 is a schematic perspective view of the sanitary napkin 1 of FIG. 6 in a packaged state.
8 is a schematic plan view of the sanitary napkin 1'in an elongated state as viewed from the skin side in the second embodiment.
9 is a schematic plan view of the sanitary napkin 1 ″ in an elongated state in the third embodiment as viewed from the skin side.
10 is a schematic cross-sectional view taken along line BB of FIG. 9.

[Explanation of Embodiment]

From the description of the present specification and the accompanying drawings, at least the following matters will become apparent.

An absorbent article having a front-rear direction, a width direction, and a thickness direction intersecting each other,

The absorbent article

Liquid permeable surface sheet;

Liquid impermeable back sheet;

As a liquid-absorbing absorbent core disposed between the top sheet and the back sheet,

The absorbent core includes a low basis weight portion, and the basis weight of the absorbent core in the low basis weight portion is lower than the basis weight of the absorbent core around the low basis weight portion,

The low basis weight portion extends at least in the width direction,

A liquid-absorbing absorbent core provided at a position where the low basis weight portion overlaps the elastic member in the front-rear direction;

As viewed from the thickness direction, as a pair of leakage preventing walls extending in the front-rear direction on both sides of the absorbent core in the width direction,

Each leakage preventing wall includes an elastic member that expands and contracts in the front-rear direction,

Each leak-proof wall is capable of standing toward the skin side in the thickness direction,

The elastic member may include a leakage preventing wall including an elastic portion expressing elasticity in the front-rear direction; And

Any one of a cooling agent and a warming agent applied so as to overlap at least with the low basis weight when viewed in the thickness direction

Absorbent article comprising a.

According to such an absorbent article, the absorbent core including the low basis weight portion extending in the width direction is liable to deform in the front-rear direction in the low basis weight portion, so that the adhesion with the skin is improved. The force by which the absorbent core is deformed in the anteroposterior direction also acts as a force pushing air from the low basis weight portion to the skin surface. Since the low basis weight part and the cooling agent or the warming agent overlap each other when viewed in the thickness direction, the volatile components of the cooling agent or the warming agent are pushed toward the skin side in conjunction with the movement of air generated by the action of the low basis weight part, so that the cooling effect or the warm feeling effect Becomes easier to express. The elastic member that expands and contracts in the front-rear direction promotes the deformation of the absorbent article in the front-rear direction according to the movement of the wearer, while bringing the absorbent article into close contact with the skin. The leakage prevention wall makes it difficult to escape the volatile component of the cooling agent or the warming agent pushed from the low basis weight portion located in the front-rear position where the elastic member overlaps the elastic member, thereby making it easier to maintain the cooling effect or the warm feeling effect. .

In such absorbent articles,

The back sheet includes an adhesive portion coated with an adhesive on the non-skin side of the back sheet in the thickness direction,

It is preferable that the low basis weight portion includes a portion overlapping the adhesive portion as viewed in the thickness direction.

According to such an absorbent article, the absorbent article is bonded to a garment such as an undergarment by the adhesive portion. Since the low basis weight portion includes a portion overlapping the adhesive portion as viewed in the thickness direction, it is possible to suppress the low basis weight portion from deviating from the wear. And, at the same time, the space for holding the cooling agent or the component of the warming agent can be maintained on the skin side, and air containing the component of the cooling agent or the warming agent can be further sent to the skin side by stretching and contracting the elastic member.

In such absorbent articles,

The low basis weight portion is provided between the first concave portion and the second concave portion,

The first concave portion is formed on the skin side of the absorbent core,

It is preferable that the second concave portion is formed on a non-skin side surface of the absorbent core at a position facing the first concave portion in the thickness direction.

According to such an absorbent article, in the low basis weight portion that promotes deformation of the absorbent core, concave portions (first concave portion and second concave portion) are formed on both the skin side and the non-skin side. This makes it easy for the absorbent core to bend on both the skin side and the non-skin side in the low basis weight portion. Thereby, the followability of the absorbent core following the movement of the wearer is improved. Since the absorbent article is easily deformed in the low basis weight portion, this promotes the flow of air pushed from the low basis weight portion to the skin side, thereby making it easier to obtain a cooling effect or a warm feeling effect.

In such absorbent articles,

The absorbent article further includes a pair of wing portions positioned at the front side with respect to the center in the front-rear direction of the absorbent article,

The pair of wing portions extend outwardly in the width direction,

Each of the pair of wing portions has a wing adhesive portion on the non-skin side in the thickness direction,

An adhesive is applied to the wing adhesive portion,

It is preferable that the low basis weight portion is disposed on the rear side with respect to the center of each wing adhesive portion in the front-rear direction.

According to such an absorbent article, when the wearer looks up and lies down, the absorbent article is folded toward the non-skin side in the low basis weight portion. This makes the part of the absorbent core disposed in front of the low basis weight part in close contact with the body; This realizes a configuration where only the portion provided on the rear side with respect to the folded position moves when the wearer is tossed while sleeping. The portion of the wearer to which the absorbent core is in close contact by being folded in the low basis weight portion corresponds to the position of the wearer's perineum. Accordingly, the low basis weight portion makes it easy to change the absorbent article in the front-rear direction, so that even when the wearer is in a lying position, the absorbent article can be brought into close contact with the wearer.

In such absorbent articles,

The absorbent article further includes a pair of hip flaps positioned rearward with respect to the center of the absorbent article in the front-rear direction,

The pair of hip flaps extend outwardly in the width direction,

A narrow portion is formed between the pair of wing portions and the pair of hip flaps in the front-rear direction,

The narrow portion is a portion having the shortest length in the width direction of the absorbent article,

It is preferable that the low basis weight portion overlaps the narrow portion when viewed in the thickness direction.

According to such an absorbent article, a narrow portion of the absorbent article is formed between the wing and the hip flap, and this narrow portion is a portion where the wearer's thigh easily receives a moving force. This narrow portion and the low basis weight portion overlap each other in the thickness direction. This makes it easy to deform the narrow part that is easy to receive force in the low basis weight part in the anteroposterior direction. Due to the deformation, the flow of air occurs in the low basis weight, thereby improving the cooling effect or the warming effect.

In such absorbent articles,

The absorbent core includes a central low basis weight portion at a central portion in the width direction of the absorbent core,

The central low basis weight portion extends along the front-rear direction,

It is preferable that any one of the cooling agent and the warming agent is applied so as to overlap with the central low basis weight when viewed in the thickness direction.

According to such an absorbent article, since the central low basis weight portion is provided along the front-rear direction from the center in the width direction, the absorbent core can be deformed to protrude from the central low basis weight portion toward the body. This improves the fit of the body's curves. On the rear side of the absorbent core, the central low basis weight portion is arranged along the grooves between the buttocks, and this ensures adhesion along the shape of the body against the movement in the anteroposterior direction also on the rear side. This reduces the likelihood that air (for example, a volatilized cooling sensation component) flees to the outside, making it easier to maintain a cooling sensation effect (or a warm sensation effect).

In such absorbent articles,

The absorbent core includes a central low basis weight portion at a central portion in the width direction of the absorbent core,

The central low basis weight portion extends along the front-rear direction,

The basis weight of the central low basis weight portion is less than the basis weight around the central low basis weight portion,

It is preferable that the cooling agent or the application area to which the warming agent is applied has any one of the following configurations:

The application region does not overlap with the central low basis weight as viewed in the thickness direction, and

The coating area includes an overlapping area in which the central low basis weight portion and the coating area overlap each other when viewed in the thickness direction, and the amount of any one of the coolant and the warming agent per unit area of the overlapping area is the overlapping area Less than the amount of any one of the cooling agent and the warming agent per unit area around it.

According to such an absorbent article, it is possible to suppress excessive cold feeling directly on the excretory part of the wearer, which is a sensitive part of the wearer, and can provide a cooling effect while reducing the likelihood that the wearer feels pain or itching.

In such absorbent articles,

The absorbent article further includes a pair of wing portions positioned at the front side with respect to the center of the absorbent article in the front-rear direction,

The pair of wing portions extend outwardly in the width direction,

Each of the pair of wing portions has a wing adhesive portion on the non-skin side in the thickness direction,

An adhesive is applied to the wing adhesive portion,

A pair of side low basis weight portions are provided on both sides of the central low basis weight portion in the width direction,

Each side low basis weight portion extends along the anteroposterior direction,

Any one of the cooling agent and the warming agent is applied so as to overlap the pair of side low basis weight portions as viewed from the thickness direction,

When the pair of wing portions are folded back to the center side in the width direction along both ends in the width direction of the absorbent core,

It is preferable that at least a portion of each wing adhesive portion overlaps with a corresponding one of the side low basis weight portions as viewed in the thickness direction.

According to this absorbent article, the wing adhesive portion of each wing portion securely fixes the absorbent article, and a force is applied to each wing adhesive portion according to the movement of the wearer. Such a wing adhesive portion and a pair of side low basis weight portions overlap each other, so that even when a force is applied to the wing adhesive portion, the absorbent core is easily deformed in the side low basis weight portion according to the movement of the wearer. This improves fit. Deformation of the absorbent core in the side low basis weight portion makes it easier to generate air flow, thereby making it easier to express a cooling effect or a warm feeling effect.

In such absorbent articles,

In a region located at least a rear side of the front-rear direction with respect to the low basis weight portion extending in the width direction,

A plurality of low basis weight portions for dividing the absorbent core into a plurality of compartments are provided,

The plurality of compartments are surrounded by the plurality of low basis weight portions,

It is preferable that any one of the cooling agent and the warming agent is applied so as to overlap at least a portion of the plurality of low basis weight portions as viewed in the thickness direction.

According to such an absorbent article, a region disposed on the rear side of the low basis weight portion extending in the width direction is a region through which movement of the thigh and buttocks is easily transmitted. Compared with making the entire rear area of the absorbent core 10 easy to deform to follow the movement of the wearer, dividing the absorbent core into a plurality of compartments allows the absorbent core to be deformed according to only the necessary compartments corresponding to the movement of the wearer. And this makes it easier for the absorbent core to follow the body's movements. That is, while the absorbent core is deformed along a corresponding one of a plurality of partitions in response to a large movement, and is deformed along a smaller number of partitions in response to a small movement, it is possible to follow the movement of the wearer. Such a plurality of compartments are formed using a low basis weight portion, and the flow of air occurs at the time of deformation, so that the cooling effect or the warm feeling effect is easily expressed.

In such absorbent articles,

The absorbent core includes a first layer and a second layer provided on the non-skin side of the first layer in the thickness direction,

It is preferable that the plurality of low basis weight portions for dividing the absorbent core into the plurality of partitions are provided in at least a portion of only the first layer.

According to such an absorbent article, one layer includes a plurality of low basis weight portions that divide the absorbent core into a plurality of compartments. This creates a flow of air on the skin side (upper layer side), easily exerting a cooling effect or warm feeling effect on the skin side, and this is also the non-skin side (lower layer side) so that the absorbed liquid does not spread excessively. Can be prevented from leaking.

In such absorbent articles,

Both ends of the absorbent article in the front-rear direction are regions where the absorbent core does not exist,

It is preferable that any one of the cooling agent and the warming agent is applied so as to overlap at least part of both ends of the front-rear direction as viewed from the thickness direction.

According to such an absorbent article, since the absorbent core does not exist at both ends of the absorbent article in the front-rear direction, there is no factor of absorbing the cool feeling component or the warm feeling component. This makes it possible to maintain a strong cold component or a strong warm component than the portion in which the absorbent core is present. Both ends in the front-rear direction are portions that frequently come into contact with the wearer's fingers when the wearer removes the exterior sheet and attaches the absorbent article. By allowing the wearer to directly feel the cool feeling or the warm feeling from this part, the wearer can make the wearer perceive the cool feeling or the warm feeling effect.

In such absorbent articles,

A packaging material for packaging the absorbent article is included,

The packaging material is folded together with the absorbent article at a predetermined folding position by containing the absorbent article,

At one end of the both ends of the absorbent article in the front-rear direction, either the cooling agent or the warming agent is applied so as to overlap the one end of the absorbent article as viewed in the thickness direction,

In the folded state,

The skin-side surface of the one end is preferably in contact with any one of the following:

The non-skin side surface of the absorbent article on a side close to the other end of both ends in the front-rear direction, and

The non-skin side surface of the packaging material disposed to cover the non-skin side surface.

According to such an absorbent article, one end portion is a portion in which a strong cooling sensation component or a strong warm sensation component is maintained. When the wearer contacts the skin-side surface of the end where such a cooling sensation component or a warm sensation component is volatilized, a cooling sensation effect (warm sensation effect) is transmitted to the contact portion. When the wearer opens the packaging material, the wearer can feel the cool feeling (warm feeling) by touching the contact portion with the wearer's finger, and the cool feeling effect (warm feeling effect) of the absorbent article can be recognized from the time the wearer opens the packaging material. By using the absorbent article after recognizing the feeling of cooling effect (the effect of feeling warm), the wearer can feel the feeling of feeling of cooling (warm) more easily.

===First embodiment ===

Hereinafter, an embodiment will be described taking the sanitary napkin 1 as an example of the absorbent article according to the first embodiment. However, the absorbent article 1 of the present embodiment is not limited thereto, and may be any article fixed to the user's clothing, such as a panty liner or a light incontinence pad.

<Basic structure of absorbent article (1)>

1 is a schematic plan view of a sanitary napkin 1 (hereinafter referred to as sanitary napkin 1) in an elongated state as viewed from the skin side in the first embodiment. 2 is a schematic plan view of the sanitary napkin 1 in an elongated state in the first embodiment as viewed from the non-skin side. FIG. 3A is a schematic cross-sectional view taken along line A-A in FIG. 1, and FIG. 3B is a schematic cross-sectional view showing the leak-proof wall 7. 4 is a schematic cross-sectional view showing the linear compression portion 40 and the low basis weight portion 50 of FIG. 3. For convenience of explanation, the core wrap sheet 11 is not shown in FIG. 4.

In the stretched state shown in Fig. 1, the sanitary napkin 1 includes a "front and back direction", a "width direction" and a "thickness direction" intersecting each other. In the anteroposterior direction, the front side corresponds to the front of the user, and the rear side corresponds to the wearer's back. A direction intersecting the anteroposterior direction and the width direction is a thickness direction (a direction penetrating the paper in Fig. 1), and in the thickness direction, the side in contact with the wearer is "skin side", and the opposite side is "non-skin side". The X-X line in the drawing is the center line in the width direction.

Here, "elongated state" refers to a state in which the product [sanitary napkin 1] is stretched without wrinkles, and specifically, each member constituting the sanitary napkin 1 by stretching the sanitary napkin 1 (for example, a side to be described later) It refers to a state in which the dimensions of the sheet 2 and the absorbent core 10] are equal to or approximately equal to their length as a single member.

As shown in Fig. 3, the sanitary napkin 1 has a pair of side sheets 2, a top sheet 3, a second sheet 4, an absorbent core 10, and a back sheet from the skin side in the thickness direction. 5) are stacked in this order. These members 2 to 5 and 10 are bonded to members adjacent in the thickness direction with an adhesive HMA such as a hot melt adhesive.

The top sheet 3 and the second sheet 4 are liquid-permeable sheets that permeate a liquid (eg, body fluid), and may be, for example, air-through nonwoven fabric. The back sheet 5 is a liquid-impermeable sheet, and may be, for example, a resin film (for example, a polyethylene (PE) film). The plane size of the top sheet 3 and the back sheet 5 is larger than that of the absorbent core 10. The top sheet 3 covers at least the center of the absorbent core 10 in the width direction from the skin side. The side sheet 2 covers both ends of the top sheet 3 in the width direction from the skin side, and extends outward from the top sheet 3 in the width direction (see Fig. 3). For the side sheet 2, a hydrophobic sheet can be used from the viewpoint of preventing leakage.

The sanitary napkin 1 includes a pair of wing portions 20 and a pair of hip flaps 30. The wing portion 20 is provided on the front side in the front-rear direction with respect to the center of the sanitary napkin 1 (center line Y), and extends to both outer sides in the width direction. The hip flaps 30 are provided on the rear side in the front and rear direction with respect to the center of the sanitary napkin 1 (center line Y), and extend to both outer sides in the width direction. In the first embodiment, the wing portion 20 and the hip flap 30 are formed by a back sheet 5 and a side sheet 2 extending outward from both side portions in the width direction of the top sheet 3. However, the structure is not limited thereto. For example, a separate sheet member (not shown) may be provided between each side sheet 2 and the back sheet 5, and this separate sheet member is the strength of the wing portion 20 and the hip flap 30 Increase

As shown in FIGS. 2 and 3, on the non-skin side surface of the back sheet 5 in the thickness direction, an adhesive portion 25 to which an adhesive is applied is provided extending along the front-rear direction. When using the sanitary napkin 1, the adhesive portion 25 is attached to the skin side of a clothing such as an undergarment, and thus the sanitary napkin 1 is fixed to the clothing. In FIG. 2, six rectangular adhesive portions 25 having long sides extending in the front-rear direction are arranged side by side at intervals in the width direction, but the shape and number of the adhesive portions 25 are not limited thereto.

Similarly, each wing portion 20 has a wing adhesive portion 21 on the non-skin side (non-skin side of the back sheet 5) in the thickness direction, and an adhesive is applied to the wing adhesive portion 21. (See Fig. 2). When using the sanitary napkin 1, the wing portion 20 is folded to the non-skin side, and each wing adhesive portion 21 is attached to the non-skin side of underwear, etc., thereby fixing the sanitary napkin 1 to the underwear, etc. . In FIG. 2, two rectangular wing adhesive portions 21 having long sides extending in the front-rear direction are arranged side by side in the width direction, but the shape and number of the wing adhesive portions 21 are not limited thereto.

Further, on the non-skin side (non-skin side of the back sheet 5) of each of the hip flaps 30 in the thickness direction, a hip flap adhesive portion 31 to which an adhesive is applied is provided (FIG. 2). When using the sanitary napkin 1, the hip flap 30 is not folded and is disposed between the wearer's worn article (underwear, etc.) and the buttocks. The hip flap adhesive portion 31 is attached to the skin side of the underwear, and thus the sanitary napkin 1 is fixed to the underwear or the like. In FIG. 2, two rectangular hip flap adhesive portions 31 having long sides extending in the front-rear direction are arranged side by side in the width direction, but the shape and number of the hip flap adhesive portions 31 are not limited thereto.

The sanitary napkin 1 includes, in this order, an anterior region R1, a central region R2, and a rear region R3 from an anterior to anteroposterior direction (Fig. 1). "Front area (R1)" refers to the area located on the front side of the portion provided with the wing part 20, which is the narrowest area in the width direction of the sanitary napkin 1 located in front of the wing adhesive part 21 It is located anteriorly. "Rear region (R3)" refers to a region located at the rear side of the region where the wing portion 20 is provided, which is the narrowest region in the width direction of the sanitary napkin 1 located at the rear side of the wing adhesive portion 21 It is located on the posterior side. A region located between the front region R1 and the rear region R3 in the front-rear direction and provided with the wing portion 20 is referred to as a center region R2. The sanitary napkin 1 is individually wrapped by folding into three types as follows: At the side folded position Fs extending along the anteroposterior direction, both sides of the sanitary napkin 1 in the width direction are folded inward in the width direction along the anteroposterior direction. Higo; The sanitary napkin 1 is folded at the front folded position Ff positioned in the front region R1 and the rear folded position Fb positioned in the rear region R3.

The absorbent core 10 is disposed between at least the top sheet 3 and the back sheet 5 and is a member that absorbs and holds a liquid (excretion fluid) such as acupuncture points therein. As the absorbent material constituting the absorbent core 10, for example, pulp fibers or cellulose absorbent fibers (liquid absorbent fibers), liquid absorbent granules (super absorbent polymer, so-called SAP), or the like can be used. The absorbent core 10 may include thermoplastic resin fibers. The sanitary napkin 1 also includes a liquid-permeable core wrap sheet 11 covering both the skin side and the non-skin side of the absorbent core 10 in the thickness direction. As a suitable material for the core wrap sheet 11, for example, tissue paper, nonwoven fabric, or the like can be used. However, the core wrap sheet 11 is not essential.

In the sanitary napkin 1 of the first embodiment, a pair of leakage preventing walls 7 that can stand up to the skin side in the thickness direction are formed by the side sheet 2 (Fig. 3A). A pair of leakage prevention walls 7 are provided extending in the front and rear directions on both sides of the absorbent core 10 in the width direction as viewed from the thickness direction, and each leakage prevention wall 7 is provided with a plurality of elasticity that expands and contracts in the front and rear direction. It includes a member 6 (Fig. 1). As shown in Figs. 3A and 3B, the leak-proof wall 7 is formed in a portion inside each side sheet 2 in the width direction. First, as shown in Fig. 3B(a), each side sheet 2 is folded back to a predetermined length 2L on the non-skin side in the thickness direction and on the outside in the width direction. And, in this state, the side sheet 2 overlaps with the top sheet 3 from the skin side of the top sheet 3, and the corresponding width of the top sheet 3 at the junction 2A extending along the front-rear direction It is joined to the direction end. Then, of each of the predetermined lengths 2L, the inner part in the width direction that is not joined is the skin side in the thickness direction, and the width direction with the point 7S1 as the folding starting point (see Fig. 3B(b)). It is folded back toward the outside of. Thus, the leak-proof wall 7 is formed. That is, the joint portion 2A joined to both ends in the width direction of the top sheet 3 functions as a base end point of the leak-preventing wall 7, and with respect to this base end point 2A, the portion on the front end side in the width direction is free end It is made to be able to stand up as the part 2f (see Fig. 3B(c)). A plurality of elastic members 6 (e.g., rubber bands) extending in the front-rear direction of the absorbent core 10 are fixed to the pair of leakage preventing walls 7 in a state in which the plurality of elastic members 6 extend in the front-rear direction. have. When the sanitary napkin 1 is worn, the free end portion 2f rises toward the wearer's skin side due to the elasticity in the front-rear direction provided by the respective elastic members 6. Accordingly, the leakage prevention wall 7 functions as a leakage prevention wall for suppressing side leakage of excretion liquid or the like.

As shown in FIG. 1, a linear compression portion 40 is provided on the skin side of the sanitary napkin 1. In the linear compression portion 40 of the sanitary napkin 1, as shown in FIG. 3, the top sheet 3, the second sheet 4, the core wrap sheet 11, and the absorbent core 10 are applied to the skin in the thickness direction. It is pressed from the side and is concave. Compared to the adjacent regions, the density of the absorbent core 10 in each of the linear compression portions 40 is higher. The components from the top sheet 3 to the absorbent core 10 are compressed (embossed) from the skin side in the thickness direction by the linear pressing portion 40 to be bonded and integrated. The linear crimping portion 40 extends over the front region R1, the center region R2, and the rear region R3, and is formed in a substantially annular shape that is long in the front-rear direction as a whole. The linear crimp portion 40 is formed along the outer periphery of the absorbent core 10. As for the linear compression portion 40, at least the absorbent core 10 needs to be compressed in the thickness direction. The absorbent core 10 may be compressed together with the surface sheet 3 in the thickness direction, or may be compressed together with the core wrap sheet 11 in the thickness direction.

<Details of cooling agent or warming agent>

5 shows an application area to which a cooling agent or a warming agent is applied. In the first embodiment, the sanitary napkin 1 is provided between the top sheet 3 and the second sheet 4, and is provided with a cooling agent comprising a compound that imparts a cooling sensation to the wearer or provides a cooling sensation effect to the wearer. Include.

The coolant is a volatile substance and may act on a receptor activation channel (TRPM8) present in nerves of the skin. Examples of such cooling agents include methanol and its derivatives (such as menthyl lactate), methyl salicylate, camphor, cucumber extracts and essential oils derived from plants (such as mint, eucalyptus and nutmeg). The cooling agent may be one to reduce the ambient temperature by heat of vaporization. Examples of such cooling agents include alcohols such as methanol and ethanol.

The cooling agent may be applied in a predetermined application pattern to a desired location according to the effect of the cooling agent, such as the surface or the back of the surface sheet 3, the surface and/or the back of the second sheet 4, the absorbent core 10, etc. have. For example, on the sanitary napkin 1, a liquid coolant is applied to the non-skin side of the top sheet 3 during manufacture. 5 shows an application region Q to which a coolant is applied. As shown in Fig. 5, the cooling agent of the sanitary napkin 1 is continuously applied to the central region in the width direction from the front end to the rear end in the front-rear direction.

The sanitary napkin 1 may have a warming agent instead of a cooling agent in order to relieve the wearer's menstrual pain and sensitivity to low temperature. For example, in the application area Q shown in FIG. 5, a warming agent, which is a volatile material, may be provided between the top sheet 3 and the second sheet 4. The warm-sensing agent is provided in a state in which a warm-sensing stimulating agent that makes the wearer feel warm by imparting a stimulus to the wearer's sense of temperature and a volatile solvent are mixed with each other.

From the viewpoint of the wearer's sense of security, it is preferable that the warm feeling stimulating agent is a compound derived from a plant. Examples of warm sensation stimulants include capsicoside, capsaicin (LD50: 47 mg/kg, molecular weight: 305), capsaicinoids (such as dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, and nonibamide). , Capsantine, Benzyl Nicotinate (LD50: 2,188 mg/kg, Molecular Weight: 213), Beta-butoxyethyl Nicotinate, N-Acyl Vanillamid, Nonanoic Acid Vanillamide, Polyalcohol, Red Pepper Powder, Capsicum Tincture agent, red pepper extract, nonanoic acid vanilyl ether, vanilyl alcohol alkyl ether derivatives (e.g. vanilyl ethyl ether, vanilyl butyl ether (LD50: 4,900 mg/kg, molecular weight: 210), vanillyl pentyl ether, vanillyl hexyl Ether), isovanilyl alcohol alkyl ether, ethyl vanilyl alcohol alkyl ether, veratryl alcohol derivative, substituted benzyl alcohol derivative, substituted benzyl alcohol alkyl ether, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger Oil, gingerol (LD50: 250 mg/kg, molecular weight: 294), gingerone, hesperidine and pyrrolidone carboxylic acid, and any combination thereof.

The solvent is not particularly limited to a specific solvent as long as the solvent contains a warm sensation stimulating agent. Examples thereof include lipophilic solvents and hydrophilic solvents. The solvent can, for example, dissolve or disperse the warmth stimulant. Examples of lipophilic solvents include fats and oils such as natural oils (e.g. fatty acid esters such as triglycerides, coconut oil, linseed oil, caprylic/capric triglycerides) and hydrocarbons (such as paraffins such as liquid paraffins). Examples of hydrophilic solvents include water and alcohol. Examples of alcohols include lower alcohols such as methanol, ethanol, ethylene glycol and glycerin; And higher alcohols such as capryl alcohol, lauryl alcohol and myristyl alcohol.

It is preferable that the warmth stimulant is a substance that stimulates a temperature sensitive TRP channel. For example, TRPV1, one of the temperature sensitive TRP channels, is activated by stimulation of, for example, capsaicin or acid. When the wearer's TRPV1 is activated, acid heat occurs through the exchange nervous system (the wearer generates heat in the body).

In other words, it may warm the wearer by something that does not become hot (eg capsaicin) by itself, instead of warming the wearer by something that itself becomes hot (such as a portable body warmer). This allows the wearer to feel cold or warm without being subjected to low temperature burns or burns.

<Low basis weight section>

Next, as shown in FIGS. 1, 3 and 4, the structure of the absorbent core 10 will be described in more detail. The absorbent core 10 includes a low basis weight portion 50, and in this low basis weight portion, the basis weight of the absorbent core 10 is lower than the basis weight of the absorbent core 10 around the low basis weight portion 50. This low basis weight portion 50 extends at least in the width direction, and is provided at a position in which the elastic member 6 overlaps the elastic portion 6a (so-called effective length) that exhibits elasticity in the front-rear direction in the front-rear direction. In the low basis weight portion 50 of the first embodiment, the center of the low basis weight portion 50 in the width direction is located behind both ends of the low basis weight portion 50 in the width direction. In the cross section of the buttocks, the center in the width direction is more swollen than the side in the width direction. Therefore, in the region corresponding to the rounded portion of the buttocks, it is preferable that the side portions in the width direction (both ends in the width direction) are more deformed toward the front side than the center in the width direction. The low basis weight portion 50 may extend in a curved shape in the width direction.

In the sanitary napkin 1 of the first embodiment, low basis weight portions 51, 52 and 53 extending in the width direction are similarly provided to be spaced apart from each other in the front-rear direction. The length of each low basis weight portion in the anteroposterior direction may be constant or may not be constant. Although both ends of each low basis weight portion in the width direction of the first embodiment extend to both ends in the width direction of the absorbent core 10, both ends of each low basis weight portion are in the width direction with respect to the ends in the width direction of the absorbent core 10 It can be located inside. In this embodiment, both ends of each of the low basis weight portions extend to both ends in the width direction of the absorbent core 10, but the absorbent core 10 is made from the low basis weight portions 51, 52 and 53 as a starting point, making it easier to Transformed.

Here, the "low basis weight portion" means a region including an absorbent material having a lower basis weight than the absorbent core 10 around the low basis weight portion, or a region not including the absorbent material. That is, the "low basis weight portion" is a concept including a region in which the basis weight of the absorbent core 10 is zero. Even in the case where the low basis weight portion does not contain the absorbent material, the core wrap sheet 11 can cover the entire absorbent core 10 around both sides of the low basis weight portion. In this case, even if the absorbent core 10 is divided into a plurality of regions, the absorbent core 10 is integrally formed by the core wrap sheet 11.

The basis weight of the absorbent core 10 in the low basis weight portion is preferably 180 g/m ² or less, more preferably 120 g/m ² or less. This can promote deformation based on the low basis weight portion. The basis weight of the absorbent core 10 in the low basis weight portion may be substantially 0 g/m ² . When the basis weight of the low basis weight portion is 0 g/m ² , it is preferable to use a tissue as a core wrap to prevent leakage. The difference between the basis weight of the absorbent core 10 in the low basis weight portion and the basis weight of the absorbent core 10 around the low basis weight portion may be 100 g/m ^{2 or} more, and preferably 200 g/m ^{2 or} more. The basis weight of the absorbent core 10 in the low basis weight portion is preferably 80% or less of the basis weight of the absorbent core 10 around the low basis weight portion, and 60% or less of the basis weight of the absorbent core 10 around the low basis weight portion. It is more preferable. If the basis weight of each low basis weight portion is too high, the basis weight is preferably in these ranges, since it may become too hard to deform the absorbent core 10 when the crimp portion is formed. The low basis weight portions 50, 51, 52, and 53 are boundaries at which the rigidity of the absorbent core 10 changes. Accordingly, the low basis weight portions 50, 51, 52, and 53 correspond to regions in which the absorbent core 10 is easily deformed.

The "basis weight of the absorbent core 10" in this specification is measured by the following measurement method. The part to be measured basis weight is cut from the sanitary napkin 1, and the weight of the cut part is measured. Then, the absorbent core is removed from the cut portion, and the weight of portions other than the absorbent core such as the top sheet and the back sheet is measured. When any adhesive or the like remains in the absorbent core, such an adhesive or the like is completely removed using, for example, toluene, and after drying at room temperature for 24 hours, the weight is measured. The basis weight is calculated based on the area of the portion to be measured by subtracting the weight of the portion other than the absorbent core from the weight of the cut portion.

As described above, since the absorbent core 10 includes the low basis weight portion 50 extending in the width direction, the absorbent core 10 is easily deformed in the front-rear direction in the low basis weight portion 50, The adhesion is improved. The force that the absorbent core 10 deforms in the front-rear direction allows air to be introduced into the position between the fibers of the absorbent core 10 through the low basis weight portion 50, and the introduced air is lowered from the position between the fibers. It acts as a force pushing it toward the skin side through the part 50. By repeating the deformation of the absorbent core 10 in the front-rear direction, air is repeatedly introduced and discharged (pushed out). Accordingly, provision of the low basis weight portion 50 may generate a flow of air between the absorbent core 10 and the wearer's skin.

The low basis weight part 50 overlaps the application region Q to which the cooling agent or warming agent is applied in the thickness direction, that is, the cooling agent or warming agent is applied so as to overlap the low basis weight part 50 when viewed in the thickness direction. This, in conjunction with the movement of air generated by the action of the low basis weight unit 50, the volatilized cooling agent or the component of the volatilized warming agent is pushed to the side of the skin, making it easy to express a cooling effect or a warm feeling effect. The low basis weight portion 50 is provided at a position where the elastic member 6 overlaps in the front-rear direction with the elastic portion 6a expressing elasticity in the front-rear direction, and the wearer's movement while the sanitary napkin 1 is in close contact with the skin. It promotes the transformation in the anteroposterior direction following the The pair of leakage preventing walls 7 reduce the likelihood that the volatilized cool feeling component or the volatilized warm feeling component pushed from the low basis weight part 50 escapes in the width direction, making it easy to maintain the cooling feeling effect or the warm feeling effect.

Whether the cooling agent or the warming agent is applied so as to overlap with the low basis weight portion 50 as viewed in the thickness direction can be specified by performing a sensory test described below. The following inspection is carried out when a coolant is applied to the sanitary napkin 1. Since the cooling agent is a volatile substance, the vaporized cooling agent moves in the vertical direction and the left and right directions in the interior of the sanitary napkin 1 (the sympathy surrounded by each sheet member). Therefore, there is a case where the cooling agent is detected even in a region where the cooling agent is not applied.

First, the low basis weight portion 50 and the hip flap 30 of the sanitary napkin 1 are cut to a predetermined size. The surface sheet 3, which is the skin surface of the cut low basis weight portion 50, and the side sheet 2, which is the skin surface of the hip flap 30, are peeled off and cut out. Using the surface sheet 3 of the peeled and cut low basis weight portion 50 and the side sheet 2 of the peeled and cut hip flap 30, and the surface sheet 3 and the side sheet 2 as sample sheets, 30 Produce each piece.

Next, one surface sheet 3 of the low basis weight portion 50 among the sample sheets is prepared as a sample sheet, and a PE sheet having the same size as the sample sheet is provided. Next, the PE sheet is superimposed on the non-skin side surface of the sample sheet, and the skin side surface of the sample sheet is placed against the inner side of the tester's upper arm in the sensory test. The inspector measures and records T1, which is the time until feeling the cooling effect of the cooling agent on the sample sheet.

Next, by providing one side sheet 2 of the hip flap 30 among the sample sheets as a sample sheet, and performing the same method, the time T2 until the inspector feels the cooling effect of the cooling agent of the sample sheet is determined. Measure and record.

This measurement is repeated for the corresponding set of 30 sample sheets, and the average time of T1 and the average time of T2 are calculated and compared. That is, the average time T1a, which is the time until the inspector feels the cooling effect of the sample sheet with respect to the surface sheet 3, and the average time, which is the time until the inspector feels the cooling effect of the sample sheet with respect to the side sheet 2 Compare time T2a. When T1a is about 10 times shorter than T2, the surface sheet 3 of the low basis weight portion 50 has a strong cooling effect that can be felt in a short time, and the low basis weight portion 50 is specified as the location where the cooling agent was applied. can do.

As shown in FIG. 3, the low basis weight portion 50 includes a portion overlapping the adhesive portion 25 when viewed in the thickness direction. Since the low basis weight portion 50 includes a portion overlapping in the thickness direction with the adhesive portion 25 for fixing the clothing and the sanitary napkin 1 to each other, the low basis weight portion 50 can be suppressed from deviating from the clothing. When the low basis weight portion 50 is deformed without being fixed by the adhesive portion 25, there is a concern that it may be difficult to secure a space for holding a cooling agent component (or a warming agent component) on the skin side. This is because the low basis weight portion 50 is, for example, folded toward the skin side than necessary. However, in this regard, to reliably fix the low basis weight portion 50 to the clothing, the space containing the cooling agent component (or the warming agent component) can be maintained between the low basis weight portion 50 and the skin, and also elasticity Air containing a cooling agent (or warming agent) component can be sent to the skin side by stretching and contracting the member 6 in the front and rear direction.

As shown in FIG. 4, the low basis weight portion 50 includes a first concave portion 50a formed on the skin-side surface of the absorbent core 10 and a first concave portion 50a on the non-skin side surface of the absorbent core 10. It is provided between the second concave portions 50b formed at positions opposite to each other in the thickness direction of the concave portion 50a. Accordingly, in the low basis weight portion that promotes deformation of the absorbent core 10, concave portions (first concave portion 50a and second concave portion 50b) are formed on both the skin side and the non-skin side. This makes it easy for the absorbent core 10 to be easily folded on both the skin side and the non-skin side in the low basis weight portion 50. Accordingly, the followability of the absorbent core 10 according to the movement of the wearer is improved. Since the absorbent core 10 is easily deformed in the low basis weight portion 50, this promotes the flow of air pushed from the low basis weight portion 50 toward the skin side. In addition, since the volatilized cool feeling component or the volatilized warm feeling component is pushed toward the skin side by the flow of air, the cool feeling effect or the warm feeling effect is easily realized.

The low basis weight portion 50 is disposed on the rear side with respect to the center 21CL in the front-rear direction of each wing adhesive portion 21. With this arrangement, when the wearer lies on his back, the sanitary napkin 1 is folded from the low basis weight portion 50 toward the non-skin side. This causes the portion of the absorbent core 10 disposed on the front side of the low basis weight portion 50 to come into close contact with the body; This realizes a configuration in which only the portion provided on the rear side is moved with respect to the folded position (the position of the low basis weight portion 50) when the wearer is turning while sleeping. Because the sanitary napkin 1 is folded in the low basis weight part 50, the part of the wearer that the absorbent core 10 adheres to (that is, the part located in front of the low basis weight part 50) corresponds to the position of the wearer's perineum part. do. Accordingly, the low basis weight portion 50 makes it easy to deform the sanitary napkin 1 in the front-rear direction, so that the sanitary napkin 1 can be brought into close contact with the wearer even when the wearer is in a lying position.

In the front-rear direction, between the pair of wing portions 20 and the pair of hip flaps 30, a narrow portion of the sanitary napkin 1 having the shortest length in the width direction is formed. The low basis weight portion 50 overlaps the narrow portion 8 when viewed in the thickness direction. A narrow portion 8 of the sanitary napkin 1 is formed between the wing portion 20 and the hip flap 30, so that the narrow portion 8 is a portion where the wearer's thigh receives a moving force. Since the narrow portion 8 and the low basis weight portion 50 overlap each other when viewed in the thickness direction, it becomes easy to deform the narrow portion 8 that tends to receive a force from the low basis weight portion 50 in the front-rear direction. Due to this deformation, a flow of air occurs in the low basis weight, which pushes the cold or warm component to the skin side. As a result, the cooling effect or the warm feeling effect is also improved.

As shown in FIG. 1, a central low basis weight portion 55 extends in the front-rear direction at a central portion of the absorbent core 10 in the width direction. In this central low basis weight portion 55, the basis weight of the absorbent core 10 It is lower than the basis weight around the central low basis weight part 55. The cooling agent or the warming agent is applied so as to overlap the central low basis weight part 55 when viewed in the thickness direction (refer to the application area Q shown in FIG. 5). By providing a central low basis weight portion 55 extending along the front-rear direction in the center of the width direction of the absorbent core 10, the absorbent core 10 can be deformed to protrude from the central low basis weight portion 55 toward the body. have. This improves the fit to the curvature of the body. On the rear side of the absorbent core 10, the central low basis weight portion 55 is disposed along the grooves between the buttocks. This ensures adhesion along the shape of the body to movement in the anteroposterior direction, even on the rear side. This reduces the likelihood that air (for example, a volatilized cold feeling (warm) component) flees to the outside, making it easier to maintain a feeling of cold (or warm feeling).

With respect to the central low basis weight portion 55 having a basis weight lower than the basis weight around the central low basis weight portion 55, the application region Q to which the cooling agent or the warm agent is applied is the central low basis weight portion 55 as viewed from the thickness direction. ) Need not overlap. That is, although shown in Fig. 1, the central low basis weight portion 55 is provided extending along the front-rear direction at the center of the width direction (central line (X)), but the cooling agent or warming agent is applied to the center of this width direction. There is no need. Alternatively, an overlapping region in which the central low basis weight portion 55 and the application region Q overlap each other as viewed in the thickness direction may be provided. In this case, the amount of the cooling agent or the amount of the warming agent per unit area of the overlapping area is preferably less than the amount of the cooling agent or the amount of the warming agent per unit area around the overlapping area. Thereby, it is possible to suppress excessive cold (or warming) of the excretory part of the wearer, which is a sensitive part of the wearer, thereby providing a feeling of cold (or warm feeling) while also reducing the possibility of pain or itching of the wearer. can do. The amount per unit area of the cooling agent (or the warming agent) can be obtained by measuring the aroma component by the head space solid phase micro-extraction method. The method of measuring the amount of the cooling agent per unit area of the overlapping area or the amount of the warming agent is not limited to the measurement of the aroma component, and a method of measuring the weight of the cooling agent per unit area may be employed. For example, the overlapping area and the non-overlapping area (area around the overlapping area) are cut respectively, and their weight is measured. Then, the cooling (or warm) substance in the overlapping region and the non-overlapping region is left for a predetermined time until the cooling (warm) substance is completely volatilized. The weights of the overlapping area and the non-overlapping area in which the completely cool (warm) material is volatilized are measured to calculate the difference between these weights and the weights of the corresponding overlapping area and non-overlapping area before the cooling (warm) material is volatilized. Finally, by dividing by the difference in the area of the corresponding overlapping area and non-overlapping area, it is possible to obtain the amount of cool (warm) material per unit area of each of the overlapping area and non-overlapping area.

As shown in Fig. 1, in the first embodiment, a pair of side low basis weight portions 56 extending along the front-rear direction are provided on both sides of the central low basis weight portion 55 in the width direction. The following configuration is preferred: the cooling agent or the warming agent is applied so as to overlap with the pair of side low basis weight portions 56 when viewed in the thickness direction; When the pair of wing portions 20 are folded back to the center side in the width direction along both ends of the absorbent core 10 in the width direction, at least a portion of each wing adhesive portion 21 is viewed from the thickness direction. It overlaps with a corresponding one of the basis weight portions 56. The sanitary napkin 1 is reliably fixed by the wing adhesive portion 21 of each wing portion 20, and a force acts on the wing adhesive portion 21 according to the movement of the wearer. The wing adhesive portion 21 and the pair of side low basis weight portions 56 overlap each other, so that even if a force acts on the wing adhesive portion 21, the absorbent core in the side low basis weight portion 56 according to the movement of the wearer ( It makes it easy to cause deformation of 10). This improves fit. Due to the deformation of the absorbent core 10 in the side low basis weight portion 56, the flow of air tends to occur. Therefore, the component of the volatilized cooling agent or the volatilized warming agent is pushed toward the skin, and it becomes easy to express the cooling effect or the warm feeling effect.

Both ends (1fr and 1ba) in the front-rear direction of the sanitary napkin 1 (see Fig. 1) are regions in which the absorbent core 10 does not exist, and the cooling agent or the warm-sensing agent is both ends 1fr and 1ba in the front-rear direction as viewed from the thickness direction. ) It is applied so as to overlap at least part of each. Regarding the cooling component (or the warm feeling component) applied so as to overlap at least a part of each of both ends (1fr and 1ba) in the front-rear direction as viewed from the thickness direction, both ends (1fr and 1ba) in the front-rear direction of the sanitary napkin 1 have an absorbent core Since (10) does not exist, there are few factors that cause absorption of the cooling component (or the warm component). This can maintain a strong feeling of cooling component or a strong feeling of warming component than the portion in which the absorbent core 10 is present. Both ends 1fr and 1ba in the front-rear direction are portions that frequently come into contact with the wearer's fingers when the wearer removes the packaging material (for example, the packaging material 60 to be described later) and attaches the sanitary napkin 1. By allowing the wearer to directly feel the coolness or warmth from the portion, the wearer can perceive the cooling effect or the warmth effect.

6 is a schematic plan view of the sanitary napkin 1 in an elongated state including the packaging material 60 in the first embodiment as viewed from the skin side. 7 is a schematic perspective view of the sanitary napkin 1 of FIG. 6 in a packaged state. As shown in FIG. 6, the packaging material 60 is a sheet-like packaging material for individually packaging the sanitary napkin 1, and is a member that is peeled off when the sanitary napkin 1 is used. Examples of the material of the packaging material 60 may include various films, such as a plastic film and a nylon film, a nonwoven fabric, and a film obtained by laminating the nonwoven fabric. However, since the sanitary napkin 1 is provided with a cooling agent (warm sensation agent), it is preferable to use a material (film layer) capable of preventing volatilization of the cooling sensation (warm sensation) component.

The sanitary napkin 1 includes a release sheet (not shown) covering the wing adhesive portion 21 of the pair of wing portions 20 and the hip flap adhesive portion 31 of the pair of hip flaps 30, and the back sheet 5 A back sheet (not shown) covering the adhesive portion 25 is provided. A release sheet (not shown) covering the adhesive portion 25 and the packaging material 60 are adhered to each other with weak adhesion. First, in the side folded position Fs along the front-rear direction of the sanitary napkin 1, both sides of the widthwise sanitary napkin 1 including a pair of wing portions 20 and a pair of hip flaps 30 are along the front-rear direction. Folds inward in the width direction. Next, the packaging material 60 is folded to the skin surface side with the sanitary napkin 1 at the rear folding position Fb (predetermined folded position) located in the rear region R3 in the state containing the sanitary napkin 1 . Then, the packaging material 60 is folded to the skin surface side at the front folding position Ff (predetermined folding position) located in the front region R1, so that the packaging material 60 is folded in three places. The lead tape 61 provided on the front end of the packaging material 60 is affixed together with the sanitary napkin 1 to the outer surface of the packaging material 60 on the rear end side that is already folded. In the packaging material 60 that is already folded together with the sanitary napkin 1, the end 62 of the packaging material 60 in the width direction is adhered to the front and rear direction to be sealed, so that the sanitary napkin 1 is individually wrapped as shown in FIG. State.

Of the both ends 1fr and 1ba in the front-rear direction of the sanitary napkin 1, a cooling agent or a warming agent is applied to the front end 1fr (also referred to as one end) so as to overlap one end of the sanitary napkin 1 in the thickness direction. In the folded state shown in FIG. 7, the skin side surface of the front end 1fr (one end) is on the side close to the rear end 1ba (also referred to as the other end) of both ends 1fr and 1ba in the front-rear direction. It is in contact with the non-skin side surface 1Re (Fig. 7) of the sanitary napkin 1, or is in contact with the non-skin side surface of the packaging material 60 arranged to cover the non-skin side surface 1Re of the sanitary napkin 1 . The front end portion 1fr (one end portion) is a portion in which a strong cooling sensation component or a strong warm sensation component is maintained. When the wearer contacts the skin-side surface of the front end portion 1fr (one end portion) from which such a cooling sensation component or warm sensation component is volatilized, a cooling sensation effect (warm sensation effect) is transmitted to the contact portion. When the wearer removes the packaging material, the wearer feels cool by touching the contact part (a part of the non-skin side surface (1Re) facing the front end (1fr) in the thickness direction or the skin side of the packaging material 60) with the wearer's finger. (Warm sensation) can be felt, and the cool sensation effect (warm sensation effect) of the sanitary napkin 1 can be perceived from the time the wearer removes the packaging material. By using the sanitary napkin 1 after recognizing the cooling sensation effect (warm sensation effect), the wearer can more easily perceive the cooling sensation (warm sensation).

=== Second embodiment ===

Next, based on FIG. 8, the sanitary napkin 1'according to the second embodiment will be described. In the following description of the second embodiment, the same components as those of the first embodiment are provided with the same reference numerals, and the description thereof is omitted. In the absorbent article 1'according to the second embodiment, the absorbent article 1'is a plurality of low basis weight portions 50' in which a plurality of partitions (compartments 70) are formed in addition to the low basis weight portion 50 It is different that it includes.

8 is a schematic plan view of the sanitary napkin 1'in an elongated state in the second embodiment as viewed from the skin side. In the front-rear direction, a low basis weight portion extending in the width direction on the frontmost side is defined as the low basis weight portion 50 of the second embodiment. In the sanitary napkin 1'of this embodiment, in the region (rear region R3) located at least on the rear side in the front-rear direction with respect to the low basis weight portion 60, the absorbent core 10 is divided into a plurality of compartments 70 It includes a plurality of low basis weight portions 50' divided by. The plurality of low basis weight portions 50' extend not only in the width direction, but also in the front-rear direction. The plurality of compartments 70 are surrounded by a plurality of low basis weight portions 50'. The cooling agent or the warming agent is applied so as to overlap at least a portion 50' of the plurality of low basis weight portions 50' when viewed in the thickness direction.

The region (rear region R3) located at the rear side of the low basis weight portion 50 extending in the width direction is a region through which the movements of the thigh and buttocks are easily transmitted. Compared to making it easy to deform the entire rear area of the absorbent core 10 to follow the movement of the wearer, by dividing the absorbent core 10 into a plurality of compartments 70, it is absorbent along only the necessary area corresponding to the movement of the wearer. Since the core 10 can be deformed, the absorbent core 10 becomes easier to follow the movement of the body. That is, the absorbent core 10 is transformed according to a corresponding one of the plurality of compartments 70 in response to a large movement, and transformed according to a smaller number of compartments 70 in response to a small movement, thereby following the movement of the wearer. can do. Since the plurality of compartments 70 are formed using the low basis weight portion 50', air flow occurs when deformed, so that the cold or warm feeling component volatilized from each low basis weight portion 50' It is pushed, and it becomes easy to express a feeling of cooling effect or a feeling of warmth effect.

In the front region R1 and the central region R2, the sanitary napkin 1'of the second embodiment does not include a low basis weight portion such as the central low basis weight portion 55, but the sanitary napkin 1'of the second embodiment Is not limited to this. The sanitary napkin 1'of the second embodiment may similarly include a low basis weight portion in the front region R1 and the central region R2.

=== 3rd embodiment ===

A sanitary napkin 1 ″ according to the third embodiment will be described based on FIGS. 9 and 10. In the following description of the third embodiment, the same components as those of the first embodiment are provided with the same reference numerals, and the description thereof is omitted. In the absorbent article 1 ″ according to the third embodiment, the configuration of the plurality of low basis weight portions 50 ′ is different from the configuration of the plurality of low basis weight portions 50 ′ in the second embodiment.

9 is a schematic plan view of the sanitary napkin 1 ″ in an extended state in the third embodiment as viewed from the skin side. 10 is a schematic cross-sectional view taken along line B-B of FIG. 9. For illustrative purposes, the core wrap sheet 11 is not shown in FIG. 10.

As shown in Fig. 10, the absorbent core 10 of the sanitary napkin 1 ″ of the third embodiment is provided on the non-skin side in the thickness direction of the first layer 10a and the first layer 10a. It includes two layers (10b). A plurality of low basis weight portions 50' that divide the absorbent core 10 into a plurality of partitions 70 are provided at least in part only on the first layer 10a. Since the first layer 10a on the skin side includes a plurality of low basis weight portions 50' dividing the absorbent core 10 into a plurality of compartments 70, the absorbent core 10 in the low basis weight portion 50' ), the air flow is generated on the skin side (upper layer side), making it easier to express the cooling effect or the warm feeling effect. At the same time, on the non-skin side (lower layer side) of the absorbent core 10, leakage of the absorbed liquid can be prevented so that the absorbed liquid does not diffuse excessively. Accordingly, it is possible to achieve both the promotion of the cooling or warm feeling effect and the improvement of the water absorption. In the front-rear direction, the plurality of low basis weight portions 50 ′ are provided so that the elastic members 6 extend and contract portions 6a expressing elasticity in the front-rear direction overlap, so that the pair of leakage preventing walls 7 The possibility that the warmth effect is lost in the width direction is reduced.

Another embodiment

Although the embodiments of the present disclosure have been described above, the embodiments of the present disclosure are merely for facilitating understanding of the disclosure, and should not be interpreted in any way as limiting the disclosure. The present disclosure may be variously changed or improved without departing from the gist thereof, and includes equivalents thereof.

In the above embodiment, a plurality of linear crimping portions 40 are provided, but the present invention is not limited thereto. The entire sanitary napkin may be provided with a point-shaped press. For example, by providing a plurality of point-shaped pressing portions over the entire planar area of the absorbent core 10, the rigidity of the absorbent core 10 is increased, and feces and the like are easily diffused in the front-rear direction.

In the above embodiment, the low basis weight portion 50 (and the low basis weight portions 51, 52, 53, etc.) comprises an absorbent material or an absorbent material having a lower basis weight than the absorbent core 10 around the low basis weight portion. Although the area is not, the basis weight portion may be an elongated slit portion or a concave portion space formed by pressing a part of a member.

1 sanitary napkin (absorbent article), 1'sanitary napkin (absorbent article),
1'' sanitary napkin (absorbent item)
1ba rear end, 1fr front end, 1Re non-skin side,
2 side seat, 2A joint, 2f free end,
3 top sheet, 4 second sheet, 5 back sheet,
6 elastic member, 7 leak-proof wall, 7S1 point,
8 narrow section, 10 absorbent core, 10a first layer, 10b second layer,
11 Core wrap sheet, 20 wing part, 21 wing adhesive part,
21CL front and rear center,
25 adhesive part, 30 hip flap, 31 hip flap adhesive part,
40 linear crimp section, 50 low basis weight section, 50' low basis weight section,
50a first concave, 50b second concave,
51 Low basis weight, 52 Low basis weight, 53 Low basis weight,
55 center low basis weight, 56 side low basis weight,
60 packing material, 61 lead tape, 62 ends,
70 compartments

Claims (12)

An absorbent article having a front-rear direction, a width direction, and a thickness direction intersecting each other,
The absorbent article
Liquid permeable surface sheet;
Liquid impermeable back sheet;
As a liquid-absorbing absorbent core disposed between the top sheet and the back sheet,
The absorbent core includes a low basis weight portion, and the basis weight of the absorbent core in the low basis weight portion is lower than the basis weight of the absorbent core around the low basis weight portion,
The low basis weight portion extends at least in the width direction,
A liquid-absorbing absorbent core provided at a position where the low basis weight portion overlaps the elastic member in the front-rear direction;
As viewed from the thickness direction, as a pair of leakage preventing walls extending in the front-rear direction on both sides of the absorbent core in the width direction,
Each leakage preventing wall includes an elastic member that expands and contracts in the front-rear direction,
Each leak-proof wall is capable of standing toward the skin side in the thickness direction,
The elastic member may include a leakage preventing wall including an elastic portion expressing elasticity in the front-rear direction; And
Any one of a cooling agent and a warming agent applied so as to overlap at least with the low basis weight when viewed in the thickness direction
Absorbent article comprising a. The method of claim 1,
The back sheet includes an adhesive portion coated with an adhesive on the non-skin side of the back sheet in the thickness direction,
The absorbent article comprising a portion of the low basis weight portion overlapping the adhesive portion as viewed in the thickness direction. The method according to claim 1 or 2,
The low basis weight portion is provided between the first concave portion and the second concave portion,
The first concave portion is formed on the skin side of the absorbent core,
The absorbent article, wherein the second concave portion is formed on a non-skin side surface of the absorbent core at a position facing the first concave portion in the thickness direction. The method according to claim 1 or 2,
The absorbent article further includes a pair of wing portions positioned at the front side with respect to the center in the front-rear direction of the absorbent article,
The pair of wing portions extend outwardly in the width direction,
Each of the pair of wing portions has a wing adhesive portion on the non-skin side in the thickness direction,
An adhesive is applied to the wing adhesive portion,
The absorbent article, wherein the low basis weight portion is disposed on the rear side with respect to the center of each wing adhesive portion in the front-rear direction. The method of claim 4,
The absorbent article further includes a pair of hip flaps positioned rearward with respect to the center of the absorbent article in the front-rear direction,
The pair of hip flaps extend outwardly in the width direction,
A narrow portion is formed between the pair of wing portions and the pair of hip flaps in the front-rear direction,
The narrow portion is a portion having the shortest length in the width direction of the absorbent article,
The absorbent article, wherein the low basis weight portion overlaps the narrow portion as viewed in the thickness direction. The method according to claim 1 or 2,
The absorbent core includes a central low basis weight portion at a central portion in the width direction of the absorbent core,
The central low basis weight portion extends along the front-rear direction,
Any one of the cooling agent and the warming agent is applied so as to overlap with the central low basis weight when viewed in the thickness direction. The method according to claim 1 or 2,
The absorbent core includes a central low basis weight portion at a central portion in the width direction of the absorbent core,
The central low basis weight portion extends along the front-rear direction,
The basis weight of the central low basis weight portion is less than the basis weight around the central low basis weight portion,
An absorbent article having any one of the following configurations in the application region to which the cooling agent or the warming agent is applied:
The application region does not overlap with the central low basis weight as viewed in the thickness direction, and
The coating area includes an overlapping area in which the central low basis weight portion and the coating area overlap each other when viewed in the thickness direction, and the amount of any one of the coolant and the warming agent per unit area of the overlapping area is the overlapping area Less than the amount of any one of the cooling agent and the warming agent per unit area around it. The method of claim 6,
The absorbent article further includes a pair of wing portions positioned at the front side with respect to the center of the absorbent article in the front-rear direction,
The pair of wing portions extend outwardly in the width direction,
Each of the pair of wing portions has a wing adhesive portion on the non-skin side in the thickness direction,
An adhesive is applied to the wing adhesive portion,
A pair of side low basis weight portions are provided on both sides of the central low basis weight portion in the width direction,
Each side low basis weight portion extends along the anteroposterior direction,
Any one of the cooling agent and the warming agent is applied so as to overlap the pair of side low basis weight portions as viewed from the thickness direction,
When the pair of wing portions are folded back to the center side in the width direction along both ends in the width direction of the absorbent core,
An absorbent article in which at least a portion of each wing adhesive portion overlaps with a corresponding one of the side low basis weight portions as viewed in the thickness direction. The method according to claim 1 or 2,
In a region located at least a rear side of the front-rear direction with respect to the low basis weight portion extending in the width direction,
A plurality of low basis weight portions for dividing the absorbent core into a plurality of compartments are provided,
The plurality of compartments are surrounded by the plurality of low basis weight portions,
Any one of the cooling agent and the warming agent is applied so as to overlap at least a portion of the plurality of low basis weight portions as viewed in the thickness direction. The method of claim 9,
The absorbent core includes a first layer and a second layer provided on the non-skin side of the first layer in the thickness direction,
An absorbent article provided with the plurality of low basis weight portions dividing the absorbent core into the plurality of compartments, at least partially in only the first layer. The method according to claim 1 or 2,
Both ends of the absorbent article in the front-rear direction are regions where the absorbent core does not exist,
Any one of the cooling agent and the warming agent is applied so as to overlap at least a portion of both ends of the front-rear direction as viewed from the thickness direction. The method of claim 11,
A packaging material for packaging the absorbent article is included,
The packaging material is folded together with the absorbent article in a folded position by containing the absorbent article,
At one end of the both ends of the absorbent article in the front-rear direction, either the cooling agent or the warming agent is applied so as to overlap the one end of the absorbent article as viewed in the thickness direction,
In the folded state,
The skin-side surface of the one end is in contact with any one of the following:
The non-skin side surface of the absorbent article on a side close to the other end of both ends in the front-rear direction, and
The non-skin side surface of the packaging material disposed to cover the non-skin side surface.

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