JP6045655B1 - Absorbent articles - Google Patents

Abstract

An absorbent article that imparts an appropriate cooling effect early and for a long time is provided. SOLUTION: An absorbent article 1 comprising a skin contact sheet 17, a clothing contact sheet 21, and a microcapsule 55 containing a cooling sensation component, wherein the skin contact sheet 17 is a fabric containing fibers. The fiber density of the fibers on the skin contact surface 15 side of the skin contact sheet 17 is higher than the fiber density of the fibers on the non-skin contact surface 57 side of the skin contact sheet 17, and the skin contact sheet 17 includes the microcapsules 55 therein, and the number density of the microcapsules 55 on the skin contact surface 15 side of the skin contact sheet 17 is equal to the microcapsules 55 on the non-skin contact surface 57 side of the skin contact sheet 17. The absorbent article 1 is characterized by being lower than the number density. [Selection] Figure 1

Description

  The present disclosure relates to absorbent articles.

  Absorbent articles such as sanitary napkins, panty liners, etc. have improved basic performance due to many years of technical development, and leaks etc. after absorbing excretion such as menstrual blood compared to before. At present, absorbent articles and the like having higher functions such as an aroma function and a cooling function have been developed.

  Patent Document 1 describes an absorbent article that is intended to prevent an excessive stimulus from being given to a wearer and to reliably suppress discomfort due to stuffiness or stickiness. The absorbent article of Patent Document 1 is arranged between a top sheet having a contact surface that comes into contact with the skin of the wearer, a liquid-impermeable back sheet that does not transmit liquid, and the top sheet and the back sheet. And a material including a cooling agent between the top sheet and the back sheet, and the material including the cooling agent is disposed on both sides in the width direction of the absorber. .

JP 2010-234027 A

In the absorbent article described in Patent Literature 1, the refreshing agent is disposed between the top sheet and the back sheet, and the top sheet exists between the refreshing agent and the wearer. Although the distance between the wearer and the wearer is far from being excessively stimulated, the wearer tends to take time until the wearer feels the action of the refreshing agent.
Therefore, an object of the present disclosure is to provide an absorbent article that imparts an appropriate cooling effect early and for a long time.

  The present disclosure is an absorbent article comprising a skin contact sheet, a clothing contact sheet, and a microcapsule containing a cooling sensation component, wherein the skin contact sheet includes a fabric containing fibers, The fiber density of the fibers on the skin contact surface side of the skin contact sheet is higher than the fiber density of the fibers on the non-skin contact surface side of the skin contact sheet, and the skin contact sheet And the number density of microcapsules on the skin contact surface side of the skin contact sheet is greater than the number density of microcapsules on the non-skin contact surface side of the skin contact sheet. The absorbent article characterized by being low also was discovered.

  The absorbent article of the present disclosure imparts an appropriate cooling effect early and for a long time.

FIG. 1 is a front view of an absorbent article 1 according to the first embodiment. FIG. 2 is a rear view of the absorbent article 1 shown in FIG. FIG. 3 is an end view of the III-III end surface of FIG. FIG. 4 is an enlarged view of a region IV in FIG. Drawing 5 is a figure for explaining an example of a manufacturing method of absorptive article 1 of this indication. Drawing 6 is a figure for explaining an example of a manufacturing method of absorptive article 1 of this indication. Drawing 7 is a figure for explaining an example of a manufacturing method of absorptive article 1 of this indication.

The present disclosure relates to the following aspects.
[Aspect 1]
An absorbent article comprising a skin contact sheet, a clothing contact sheet, and a microcapsule containing a cooling sensation component,
The skin contact sheet includes a fabric containing fibers, and the fiber density of the fibers on the skin contact surface side of the skin contact sheet is equal to the fiber on the non-skin contact surface side of the skin contact sheet. The skin contact sheet includes the microcapsules therein, and the number density of the microcapsules on the skin contact surface side of the skin contact sheet is greater than that of the skin contact sheet. Lower than the number density of microcapsules on the non-skin contact surface side,
The said absorbent article characterized by the above-mentioned.

  In the absorbent article according to aspect 1, the fiber density of the fibers on the skin contact surface side of the skin contact sheet is higher than the fiber density of the fibers on the non-skin contact surface side of the skin contact sheet, and the skin contact The number density of microcapsules on the skin contact surface side of the contact sheet is lower than the number density of microcapsules on the non-skin contact surface side of the skin contact sheet. As a result, the microcapsule and the cooling sensation component are difficult to touch the wearer directly and do not irritate the wearer's skin, while the microcapsule and the cooling sensation component are present near the wearer. The cooling effect by the sensitive component can be provided quickly. Moreover, since the microcapsules are widely distributed in the thickness direction of the absorbent article, it is possible to provide a cooling sensation effect by the cooling sensation component for a long time. Therefore, the absorbent article according to aspect 1 has an effect of imparting an appropriate cooling effect early and for a long time.

[Aspect 2]
The absorptivity according to aspect 1, wherein the absorbent article further includes an adhesive portion coated on the non-skin contact surface of the skin contact sheet, and the adhesive portion holds the microcapsules. Goods.
In the absorbent article according to Aspect 2, since the adhesive part coated on the skin non-contact surface of the skin contact sheet holds the microcapsule, the wearer wearing the absorbent article moves. Even if it exists, a microcapsule cannot change the position easily and a microcapsule cannot move easily to the skin contact surface of a skin contact sheet. As a result, it is difficult to give excessive irritation (cool feeling effect) to the wearer's skin. Therefore, the absorbent article according to aspect 2 has an effect of imparting an appropriate cooling effect to the wearer's skin by the cooling component.

[Aspect 3]
The fiber diameter of the fiber on the skin contact surface side of the skin contact sheet is smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet, according to aspect 1 or 2. Absorbent article.
In the absorbent article according to aspect 3, the fiber diameter of the fibers on the skin contact surface side of the skin contact sheet is smaller than the fiber diameter of the fibers on the non-skin contact surface side of the skin contact sheet. As a result, the number density of the microcapsules on the skin contact surface side of the skin contact sheet can easily form a form lower than the number density of the microcapsules on the non-skin contact surface side of the skin contact sheet. It becomes difficult for the capsule to move to the skin contact surface of the skin contact sheet. Therefore, the absorbent article according to aspect 3 has an effect of giving an appropriate cooling effect early and for a long time.

[Aspect 4]
The absorbent article according to any one of aspects 1 to 3, wherein the absorbent article does not have the microcapsule on the skin contact surface of the skin contact sheet.
Since the absorbent article according to Aspect 4 does not have microcapsules on the skin contact surface of the skin contact sheet, the skin of the wearer is given excessive irritation (cooling sensation effect) due to a cooling sensation component. Hateful. Therefore, the absorptive article given in mode 4 has an effect which gives a moderate cooling feeling action by a cooling feeling ingredient to a wearer's skin.

[Aspect 5]
The absorbent article according to any one of aspects 1 to 4, wherein 90% by mass or more of the microcapsules have a particle size of 40 μm or more and less than 80 μm.
In the absorbent article according to aspect 5, since 90% by mass or more of the microcapsules has a particle size of 40 μm or more and less than 80 μm, the number density of the microcapsules on the skin contact surface side of the skin contact sheet is It is lower than the number density of microcapsules on the non-skin contact surface side of the contact sheet, and the absorbent article can easily form a form that does not have the microcapsules on the skin contact surface of the skin contact sheet. Become. Therefore, the absorbent article according to aspect 5 has an effect of giving an appropriate cooling effect early and for a long time.

[Aspect 6]
The aspect of Embodiments 1-5, wherein the microcapsule includes a portion having a particle size of 40 μm or more and less than 60 μm and a portion having a particle size of 60 μm or more and less than 80 μm in a mass ratio of 4: 1 to 1: 4. The absorbent article as described in any one.
In the absorbent article according to aspect 6, since the microcapsules have a specific particle size, the number density of the microcapsules on the skin contact surface side of the skin contact sheet is equal to the non-skin contact surface side of the skin contact sheet. The number density of the microcapsules is lower, and the absorbent article can easily form a form that does not have the microcapsules on the skin contact surface of the skin contact sheet. Therefore, the absorbent article according to aspect 6 has an effect of giving an appropriate cooling effect early and for a long time.

[Aspect 7]
The absorbent article further includes an auxiliary sheet between the skin contact sheet and the clothing contact sheet, and the auxiliary sheet includes the microcapsule therein and the thickness of the skin contact sheet. The absorptive article according to any one of aspects 1 to 6 including a number density smaller than the number density of the microcapsules between the center surface in the vertical direction and the non-skin contact surface.
In the absorbent article according to Aspect 7, since the auxiliary sheet includes microcapsules at a predetermined number density, the microcapsules are widely distributed in the thickness direction of the absorbent article. Therefore, the absorbent article according to Aspect 7 has the effect of causing the cooling effect to act on the wearer's skin for a long time.

[Aspect 8]
The absorbent article according to aspect 7, further comprising: an adhesive part coated on a surface of the auxiliary sheet on the skin contact sheet side, which holds the microcapsules. .
In the absorbent article according to aspect 8, when the wearer wearing the absorbent article moves because the adhesive part applied to the surface of the auxiliary sheet on the skin contact sheet side holds the microcapsule. Even so, the position of the microcapsule is difficult to change, and the microcapsule is difficult to move to the skin contact surface of the skin contact sheet. As a result, it is difficult to give excessive irritation (cooling sensation effect) to the wearer's skin by the cooling sensation component. Therefore, the absorbent article according to Aspect 8 has an effect of giving an appropriate cooling sensation action by the cooling sensation component to the skin of the wearer.

[Aspect 9]
The absorbent article has an absorbent article body and a pair of flap portions extending from the absorbent article body to both sides in the width direction of the absorbent article, and the skin contact sheet and the clothing contact sheet The absorbent article as described in any one of the aspects 1-8 which forms said pair of flap part.
In the absorbent article according to the ninth aspect, the pair of flap portions include the microcapsules, and the chilly hips and the like are not excessively stimulated by a cooling sensation component (cooling sensation effect) and are cooled for a long time. The cooling effect by a sensitive component can be provided. Therefore, the absorbent article according to Aspect 9 has an effect of imparting an appropriate cooling effect early and for a long time.

The absorbent article of the present disclosure will be described in detail below with reference to the drawings as appropriate.
1-4 is a figure for demonstrating the absorbent article 1 according to one (henceforth "1st Embodiment") of embodiment of this indication. Specifically, FIG. 1 is a front view of the absorbent article 1 according to the first embodiment, specifically, a sanitary napkin. FIG. 2 is a rear view of the absorbent article 1 shown in FIG. FIG. 3 is an end view of the III-III end surface of FIG. FIG. 4 is an enlarged view of a region IV in FIG. In FIG. 3, the microcapsule existence region 51 and the microcapsule 55, and the bonding portion 59 and the bonding portion 63 are omitted.

  The absorbent article 1 has a longitudinal direction L and a width direction W. The absorbent article body 3 extends in the longitudinal direction L, and the absorbent article 1 extends from the absorbent article body 3 to the outside in the width direction W. Flap portions, that is, a pair of side flap portions 5 and a pair of hip flap portions 7. The pair of side flap portions 5 are disposed from the center in the longitudinal direction L of the absorbent article 1. The pair of hip flap portions 7 is arranged behind the absorbent article 1 and extends to the rear end of the absorbent article 1 in the longitudinal direction L.

  The absorbent article main body 3 includes a liquid permeable sheet 9, a liquid impermeable sheet 11, and an absorbent body 13 between the liquid permeable sheet 9 and the liquid impermeable sheet 11. The pair of side flap portions 5 of the absorbent article 1 includes a skin contact sheet 17 having a skin contact surface 15, a clothing contact sheet 21 having a clothing contact surface 22, a skin contact sheet 17, and a clothing apparel. And an auxiliary sheet 19 between the contact sheets 21. As with the pair of side flap portions 5, the pair of hip flap portions 7 also includes a skin contact sheet 17 having a skin contact surface 15, a clothing contact sheet 21 having a clothing contact surface 22, and a skin contact. And an auxiliary sheet 19 between the contact sheet 17 and the clothing contact sheet 21.

  In the absorbent article 1, the absorbent article main body 3 has an adhesive part 23 fixed to the liquid-impermeable sheet 11, and the absorbent article 1, specifically, the absorbent article main body 3 is adhesive. It is fixed to the inside of the wearer's clothes through the part 23.

  The absorbent article 1 penetrates the squeezed part 29 formed by squeezing the liquid permeable sheet 9 and the absorbent body 13 formed in the absorbent article main body part 3, and the liquid permeable sheet 9 and the absorbent body 13. It forms by squeezing the opening part 35 to perform, the liquid-permeable sheet 9, and the liquid-impermeable sheet 11, and has the seal part 37 (squeezing part) for sealing the outer edge of the absorbent article 1. FIG.

  The liquid permeable sheet 9 of the absorbent article main body 3 and the skin contact sheet 17 of the side flap part 5 and the skin contact sheet 17 of the hip flap part 7 are continuous, and from a single sheet (nonwoven fabric) Is formed. Moreover, the liquid-impermeable sheet 11 of the absorbent article main body 3, the clothing contact sheet 21 of the side flap portion 5, and the clothing contact sheet 21 of the hip flap portion 7 are continuous, and a single sheet ( Film).

  The absorbent article 1 has a folded portion 41 formed by folding the liquid permeable sheet 9 into three outer folds, and a squeezed portion 33 formed by squeezing the folded portion 41. In addition, the folding | returning part 41 is a leak-proof wall for preventing the absorbed bodily fluid from flowing into the width direction of an absorbent article, ie, the direction of the side flap part 5 and the hip flap part 7, from the absorbent article main-body part 3. Is forming.

  In the absorbent article 1, the liquid permeable sheet 9 of the absorbent article main body 3 has a plurality of flange portions 43 extending in the longitudinal direction L and a plurality of groove portions 47 disposed between the flange portions 43. It is a nonwoven fabric. Further, the skin contact sheet 17 of the side flap portion 5 is a nonwoven fabric having a plurality of flange portions 45 extending in the longitudinal direction L and a plurality of groove portions 49 arranged between the flange portions 45. The same applies to the hip flap portion 7. In FIG. 1, for convenience, the flange 43 and the flange 45, and the groove 47 and the groove 49 are omitted.

The pair of side flap portions 5 includes a pair of adhesive portions 25 fixed to the clothing contact surface 22 of the clothing contact sheet 21, and the absorbent article 1, specifically, the pair of side flap portions 5. The adhesive part 25 is sandwiched between the liquid-impermeable sheet 11 and the sheet is bent so as to face the liquid-impermeable sheet 11 and is fixed to the outside of the wearer's clothes through the pair of adhesive parts 25.
The pair of hip flap portions 7 includes a pair of adhesive portions 27 fixed to the clothing contact surface 22 of the clothing contact sheet 21, and the pair of hip flap portions 7 are not bent and are paired with a pair of adhesive portions. It is fixed to the inside of the wearer's clothes through the portion 27.

  The pair of side flap portions 5 is formed by squeezing the skin contact sheet 17 and the clothing contact sheet 21 and has a seal portion 39 that seals the outer edge of the absorbent article 1. Further, the pair of hip flap portions 7 includes a pressing portion 31 formed by pressing a skin contact sheet 17 having a skin contact surface 15, an auxiliary sheet 19, and a clothing contact sheet 21. The pair of hip flap portions 7 is formed by pressing the skin contact sheet 17, the clothing contact sheet 21, and the desired skin contact sheet 17, and seals the outer edge of the absorbent article 1. Part 39.

  Each of the pair of side flap portions 5 and the pair of hip flap portions 7 has a microcapsule presence region 51. As shown in FIG. 4, in the microcapsule presence region 51, the microcapsule 55 including the cooling sensation component is present inside the skin contact sheet 17, and the microcapsule on the skin contact surface 15 side of the skin contact sheet 17. The number density of the capsules 55 is lower than the number density of the microcapsules 55 on the non-skin contact surface 57 side of the skin contact sheet 17. Although not shown, in the first embodiment, the skin contact sheet 17 is formed of a fabric, and the fiber density on the skin contact surface 15 side of the skin contact sheet 17 is determined by the skin contact sheet 17. It is higher than the fiber density on the non-skin contact surface 57 side.

  By doing so, the cooling effect by the cooling component in the microcapsule 55 is more quickly given to the wearer than when the microcapsule 55 exists only between the skin contact sheet 17 and the auxiliary sheet 19. It becomes possible to act. Further, the number density of the microcapsules 55 on the skin contact surface 15 side of the skin contact sheet 17 is lower than the number density of the microcapsules 55 on the non-skin contact surface 57 side of the skin contact sheet 17 and the skin contact. Since the fiber density on the skin contact surface 15 side of the sheet 17 is higher than the fiber density on the non-skin contact surface 57 side of the skin contact sheet 17, the microcapsule 55 has the skin contact surface of the skin contact sheet 17. 15, the cooling sensation component in the microcapsule 55 is less likely to directly touch the wearer's skin, and the wearer's skin is unlikely to be excessively stimulated (cooling sensation effect) by the cooling sensation component.

  As shown in FIG. 4, in the first embodiment, the absorbent article 1 is formed on the skin non-contact surface 15 of the skin contact sheet 17, specifically, the skin contact of the skin contact sheet 17. An adhesive portion 59 applied to the contact surface 15 is provided. The bonding portion 59 is applied in a wavy coating pattern on the skin non-contact surface 15 of the skin contact sheet 17 and covers a part of the skin non-contact surface 15 of the skin contact sheet 17. ing. The adhesive portion 59 joins the skin contact sheet 17 and the auxiliary sheet 19 and is not illustrated in FIG. 4, but is a microcapsule 55 existing outside the skin contact sheet 17, specifically Holds the microcapsules 55 existing between the skin contact sheet 17 and the auxiliary sheet 19.

  By doing so, the microcapsule 55 is less likely to move to the skin contact surface 15 of the skin contact sheet 17, and the microcapsule 55 is less likely to be present on the skin contact surface 15 of the skin contact sheet 17. The cooling sensation component in the capsule 55 is difficult to touch the wearer's skin directly, and it is difficult to give excessive irritation (cooling sensation effect) to the wearer's skin due to the cooling sensation component.

  As shown in FIG. 4, the absorbent article 1 according to the first embodiment does not have the microcapsules 55 on the skin contact surface 15 of the skin contact sheet 17. By doing so, the cooling sensation component in the microcapsule 55 is less likely to directly touch the wearer's skin, and the wearer's skin is unlikely to be excessively stimulated (cooling sensation effect) by the cooling sensation component.

  As shown in FIG. 4, in the absorbent article 1 according to the first embodiment, the auxiliary sheet 19 includes the microcapsule 55 inside the auxiliary sheet 19, and the center surface 65 in the thickness direction of the skin contact sheet 17. The number density of the microcapsules 55 between the non-skin contact surface 57 is smaller than the number density. By doing so, since the microcapsules 55 are widely distributed in the thickness direction of the absorbent article 1, it is possible to provide a cooling sensation effect by the cooling sensation component for a long time.

In the present specification, the thickness (mm) that defines the center plane in the thickness direction is measured as follows.
FS-60DS [measurement surface 44 mm (diameter), measurement pressure 3 g / cm ² ] manufactured by Daiei Kagaku Seisakusho Co., Ltd. is prepared and absorbed under standard conditions (temperature 23 ± 2 ° C., relative humidity 50 ± 5%). Pressurize five different parts of the body, measure the thickness of each part 10 seconds after pressurization, and take the average of the five measurements as the thickness.

  As shown in FIG. 4, the absorbent article 1 according to the first embodiment has an adhesive portion 63 coated on the skin contact sheet side surface 61 of the auxiliary sheet 19. The adhesive portion 63 is applied in a wavy coating pattern on the skin contact sheet side surface 61 of the auxiliary sheet 19 and covers a part of the skin contact sheet side surface 61 of the auxiliary sheet 19. The bonding portion 63 joins the auxiliary sheet 19 and the skin contact sheet 17, and is not shown in FIG. 4, but is a microcapsule 55 that exists between the auxiliary sheet 19 and the skin contact sheet 17. Holding.

  By doing so, the microcapsule 55 is less likely to move to the skin contact surface 15 of the skin contact sheet 17, and the microcapsule 55 is less likely to be present on the skin contact surface 15 of the skin contact sheet 17. The cooling sensation component in the capsule 55 is difficult to touch the wearer's skin directly, and it is difficult to give excessive irritation (cooling sensation effect) to the wearer's skin due to the cooling sensation component. In addition, since the adhesive portion 63 holds the microcapsule 55 at a position far from the skin contact surface 15 of the skin contact sheet 17, the microcapsule 55 is widely distributed in the thickness direction of the absorbent article 1. The article 1 can make the wearer feel the cooling sensation component in the microcapsule 55 for a long time.

In the absorbent article of the present disclosure, the skin contact sheet is made of a fabric containing fibers. In the absorbent article of the present disclosure, the fiber density of the fibers on the skin contact surface side of the skin contact sheet may be higher than the fiber density of the fibers on the non-skin contact surface side of the skin contact sheet. preferable. The number density of microcapsules on the skin contact surface side of the skin contact sheet can easily form a form lower than the number density of microcapsules on the non-skin contact surface side of the skin contact sheet, and the skin contact sheet It is because it becomes easy to form the form which does not have a microcapsule in the skin contact surface.
Examples of the fibers on the skin contact surface side of the skin contact sheet include fibers between the center surface in the thickness direction of the skin contact sheet and the skin contact surface of the skin contact sheet. In addition, the fibers on the non-skin contact surface side of the skin contact sheet include fibers between the center surface in the center of the skin contact sheet in the thickness direction and the non-skin contact surface of the skin contact sheet. It is done.

  In the present specification, the fiber density of the skin contact sheet is determined by immersing the sample in liquid nitrogen, then dividing the sample after immersion into two, and observing the cross section with a microscope such as an electron microscope or an optical microscope. It is judged by doing.

In the absorbent article of the present disclosure, the basis weight of the microcapsules varies depending on the concentration, amount, and the like of the cooling sensation component, but is preferably 0.5 to 12 g / m ² , and more preferably 1.0 to 10 g / m ² . If the basis weight is less than 0.5 g / m ² , the cooling sensation component contained in the microcapsule may not exert its effect, and if the basis weight exceeds 12 g / m ² , the skin of the wearer May give excessive irritation (cooling effect).

In the absorbent article of the present disclosure, the number density of microcapsules on the skin contact surface side of the skin contact sheet is lower than the number density of microcapsules on the non-skin contact surface side of the skin contact sheet. The region on the skin contact surface side of the contact sheet includes a region between the center surface in the thickness direction of the skin contact sheet and the skin contact surface of the skin contact sheet. Further, the region on the non-skin contact surface side of the skin contact sheet includes a region between the center surface in the center of the skin contact sheet in the thickness direction and the non-skin contact surface of the skin contact sheet. It is done.
In the present specification, the number density of the microcapsules is visually determined in the same manner as the fiber density of the skin contact sheet. Further, from the viewpoint of discrimination, the microcapsules may be colored. For example, when the microcapsule is formed from water-soluble starch, it can be colored with iodine or the like.

In the absorbent article of the present disclosure, the fiber diameter of the fiber on the skin contact surface side of the skin contact sheet is preferably smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet, and the skin The fiber diameter of the fibers on the skin contact surface side of the contact sheet is preferably 0.20 to 0.90 times the fiber diameter of the fibers on the non-skin contact surface side of the skin contact sheet, more preferably 0. .25 to 0.80 times, and still more preferably 0.30 to 0.70 times. Since the fiber diameter of the fiber on the skin contact surface side of the skin contact sheet is smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet, the microcapsule has a skin contact of the skin contact sheet. It becomes difficult to exist on the contact surface, and the cooling sensation component in the microcapsule is difficult to directly touch the wearer's skin, and the wearer's skin is unlikely to be excessively stimulated (cooling sensation effect) by the cooling sensation component.
Examples of the fibers on the skin contact surface side of the skin contact sheet include fibers between the center surface in the thickness direction of the skin contact sheet and the skin contact surface of the skin contact sheet. In addition, the fibers on the non-skin contact surface side of the skin contact sheet include fibers between the center surface in the center of the skin contact sheet in the thickness direction and the non-skin contact surface of the skin contact sheet. It is done.

  In this specification, the fiber diameter is obtained by immersing a sample in liquid nitrogen, then folding the immersed sample in two, taking a cross-sectional image with a microscope, for example, an electron microscope, and calculating the fiber diameter of the fiber from the image. Is arbitrarily measured at 50 locations, and the average value is calculated.

In the absorbent article of the present disclosure, the microcapsule means a capsule having a diameter of 1 to 1,000 μm and having a space that encloses the core material (second functional component).
As long as the capsule contains the core material and can control the release of the core material, the external shape is not particularly limited, and examples thereof include external shapes such as a spherical shape and an indefinite shape. The capsule may be a mononuclear type having one space for holding a core material or a multi-nucleus type having a plurality of spaces for holding a core material. Examples of the shape of the space include a space shape such as a spherical shape and an indefinite shape.
Examples of the microcapsules include those having a spherical appearance and a multinuclear type space.

The microcapsules are preferably water-disintegrating microcapsules.
A water-disintegrating microcapsule releases a cooling sensation component contained in contact with a liquid (aqueous solution) such as a body fluid. Specifically, when a water-disintegratable microcapsule comes into contact with a liquid, the material of the microcapsule dissolves in water and disintegrates, and when the microcapsule comes into contact with a liquid, the microcapsule swells in water and its strength increases. The cooling sensation component is released, for example, when the microcapsule is broken and collapsed due to destruction.

The water-disintegrating microcapsules have a water solubility in the range of preferably 10 to 300 g, more preferably 20 to 200 g, and still more preferably 30 to 100 g with respect to 100 g of water at 25 ° C.
The above-mentioned water solubility is OECD guideline No. 1 except that the test temperature is 25 ° C. Measured according to the 105 flask method.

  Examples of the material of the microcapsule include those known in the art. For example, saccharides such as monosaccharides (eg glucose), disaccharides (eg sucrose), polysaccharides (eg dextrin, glucomannan) , Sodium alginate, water-soluble starch, etc.), gelatin, water-soluble polymers (for example, polyvinyl alcohol, polyvinyl acetate, etc.).

Examples of the cooling sensation component that can be encapsulated by the microcapsules include those known as a cooling sensation material in the art, for example, those that act on a receptor activation channel (TRPM8) in nerves of the skin, Examples thereof include menthol (for example, 1-menthol) and derivatives thereof, methyl salicylate, camphor, and essential oils derived from plants (for example, mint and eucalyptus). In addition, examples of the cooling sensation component include those that lower the ambient temperature by heat of vaporization, for example, alcohols such as methanol and ethanol.
Microcapsules enclosing a cooling sensation component are commercially available, and examples thereof include INCAP (trademark) that is commercially available from Symrise.

  In the absorbent article of the present disclosure, preferably 90% by mass or more, more preferably 95% by mass or more, and still more preferably 97% by mass or more of the microcapsules have a particle size of 40 μm or more and less than 80 μm. When 90% by mass or more of the microcapsules have the particle size, the microcapsules are easily distributed widely in the thickness direction of the absorbent article.

  In the absorbent article of the present disclosure, the microcapsule preferably includes a portion having a particle size of 40 μm or more and less than 60 μm and a portion having a particle size of 60 μm or more and less than 80 μm, preferably 4: 1 to 1: 4, More preferably, it is contained in a mass ratio of 3: 1 to 1: 3, and more preferably 2: 1 to 1: 2. When the mass ratio is in the above range, the microcapsules are easily distributed widely in the thickness direction of the absorbent article.

In the present specification, the particle size of the microcapsule is measured by sieving. For example, the mass ratio of the microcapsules having a particle size of 40 μm or more and less than 80 μm can be obtained by calculating the mass ratio of the microcapsules that pass through the 80 μm sieve and remain on the 40 μm mesh sieve.
Moreover, the part which has a particle size of 40 micrometers or more and less than 60 micrometers among microcapsules can be computed from the mass ratio which passes a sieve with an opening of 60 micrometers, and remains on a sieve with an opening of 40 micrometers.

As shown in the first embodiment, the absorbent article of the present disclosure preferably has no microcapsules on the skin contact surface of the skin contact sheet. This is because the microcapsule and the included cooling sensation component are difficult to touch the wearer directly, and the skin of the wearer is less likely to be excessively stimulated (cooling sensation effect) by the cooling sensation component.
The absorbent article of the present disclosure may have a small amount of microcapsules on the skin contact surface of the skin contact sheet to such an extent that excessive irritation (cooling sensation) is not easily given to the wearer's skin. This is because, if the amount of microcapsules on the skin contact surface of the skin contact sheet is small, it is difficult to give excessive irritation (cool feeling effect) to the wearer's skin.

In the absorbent article of the present disclosure, the skin contact sheet can be a sheet known in the art as long as it is a fabric including fibers, and the nonwoven fabric includes thermoplastic resin fibers as the fabric. Examples include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punch nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, SMS).
In the absorbent article of the present disclosure, the skin contact sheet preferably has hydrophilicity. This is because when the wearer sweats, the sweat easily penetrates into the skin contact sheet, and the cooling sensation component is quickly released from the microcapsule.

  Moreover, in the absorbent article of the present disclosure, as shown in the first embodiment, the skin contact sheet extends in the longitudinal direction, and a plurality of groove portions disposed between the flange portions, It may be a non-woven fabric. Such a nonwoven fabric can be manufactured using the method described in JP2008-25079A, JP2008-23326A, JP2009-30218A, or the like. Specifically, a plurality of webs containing thermoplastic resin fibers are stacked, a gas is injected onto the stacked multilayer webs to form a concavo-convex structure, and then the web having the concavo-convex structure is heated to The above-mentioned nonwoven fabric is manufactured by heat-seal | intersecting the intersection part of thermoplastic resin fibers.

  In the above method, the multilayer web is placed on a breathable support member (for example, a net-like support member), and a gas (usually air) is continuously formed on the upper surface of the multilayer web while moving the breathable support member in a predetermined direction. ) Can be formed on the upper surface of the multilayer web to form a ridge groove structure including a ridge portion and a groove portion. In addition, the lower surface of a multilayer web becomes a shape along the shape of a breathable support member. For example, when the web placement surface of the net-like support member is flat, the lower surface of the multilayer web is substantially flat (therefore, the lower surface of the formed nonwoven fabric is also substantially flat).

  A groove portion extending in the moving direction of the air-permeable support member is formed in a region of the upper surface of the web where the gas is injected, and a flange portion is formed between two adjacent groove portions. At this time, since the fibers in the region where the gas is injected move to both sides of the groove portion, the fiber density of the collar portion is usually higher than the fiber density of the groove portion.

  The number of ribs and grooves, spacing, basis weight, fiber density, etc. can be adjusted to the desired range by adjusting the number of nozzles, the diameter and pitch, the temperature and amount of gas injected from the nozzle, the tension of the web, etc. Can be adjusted.

  In the first embodiment, the fiber density of the fibers on the skin contact surface side of the skin contact sheet is higher than the fiber density of the fibers on the non-skin contact surface side of the skin contact sheet. For example, in a multi-layer web, the fiber density of the upper layer web can be made higher than the fiber density of the lower layer web.

  Further, in the above method, by increasing the amount of gas injected from the nozzle, the fiber density of the heel part (fiber density on the skin contact surface side of the skin contact sheet) is changed to the fiber density of the groove part (skin contact). The fiber density on the non-skin surface side of the contact sheet) can be made higher. Moreover, the nonwoven fabric whose fiber density of a collar part is higher than the fiber density of a groove part can be manufactured by the method as described in Unexamined-Japanese-Patent No. 2008-002034, 2008-023311 etc., for example.

  In one embodiment of the present disclosure, the fiber diameter of the fiber on the skin contact surface side of the skin contact sheet is smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet. Such a skin contact sheet can be produced, for example, by making the fiber diameter of the upper web smaller than the fiber diameter of the lower web in a multilayer web.

  In the absorbent article of the present disclosure, examples of the auxiliary sheet as desired include the same as the skin contact sheet.

Then, an example of the manufacturing method of the absorbent article 1 according to 1st Embodiment of this indication is demonstrated using FIGS. In addition, in the following description, please refer FIGS. 1-4 with the code | symbol regarding an absorbent article.
As shown in FIG. 5, the nonwoven fabric sheet 103 unwound from the first nonwoven fabric roll 101 is passed through a Z-fold member 105 known in the art, and then passed through an embossing device 107 to provide a pressing portion 33. A folded sheet 109 having the folded portion 41 is formed. Note that the upper surface of the folded sheet 109 forms the inner surface of the absorbent article.

  In addition, the nonwoven fabric sheet 103 forms the liquid-permeable sheet 9 of the absorbent article 1, and the skin contact sheets 17 of the pair of side flap portions 5 and the pair of hip flap portions 7, and the folded portion 41 is absorbent. The folded part 41 of the article 1 is formed, and the pressing part 33 of the folded part 41 forms the pressing part 33 of the absorbent article 1.

  A portion 113 of the folded sheet 109 that can form a pair of side flap portions of the portion 111 that can form an absorbent article, a portion 115 that can form a pair of hip flap portions, and a trim portion to be cut can be formed. The adhesive is applied to the portion 117 along the conveying direction MD from the adhesive coating machine 119, and two adhesive portions 59 are formed on the folded sheet 109, as shown in FIG. A folded sheet 120 having an adhesive portion is formed.

Next, the folded sheet 120 having an adhesive portion should be excised from a portion 113 capable of forming a pair of side flap portions of a portion 111 capable of forming an absorbent article, and a portion 115 capable of forming a pair of hip flap portions. The microcapsule 55 is applied from the microcapsule coating machine 121 to the portion 117 where the trim portion can be formed and on the adhesive portion 59 along the conveying direction MD, and a pair of side flaps on the folded sheet 109 The microcapsule presence region 51 is formed on each of the portions 113 that can form the portion, and the microcapsule presence region 53 is formed on each of the portions 115 that can form the pair of hip flap portions. As shown, a folded sheet 123 having adhesive portions and microcapsules is formed.
Note that a suction box 122 for sucking the microcapsules 55 is provided with the folded sheet 109 of the microcapsule coating machine 121 interposed therebetween.

  In the skin contact sheet of the absorbent article of the present disclosure, the number density of microcapsules on the skin contact surface side and the number density of microcapsules on the non-skin contact surface side are the air of the microcapsule coating machine. The pressure can be adjusted by adjusting the suction pressure or the like of a suction box provided on the opposite side of the microcapsule coating machine with the folded sheet interposed therebetween.

  Next, in the folded sheet 109, a portion 113 that can form a pair of side flap portions, a portion 115 that can form a pair of hip flap portions, and a portion 117 that can form a trim portion to be cut are transferred in the conveyance direction MD. Along the (longitudinal direction L of the absorbent article 1), an adhesive can be applied from the adhesive applicator 124 to form a pair 113 of side flap portions and a pair of hip flap portions. An adhesive portion 63 is formed on the portion 115 and the portion 117 that can form a trim portion to be cut, and on the microcapsule-existing region 51 and the microcapsule-existing region 53. A folded sheet 125 is formed.

  Subsequently, the auxiliary | assistant wound out from the 2nd nonwoven fabric roll 127 on the part 115 which can form a side flap part, and the part 115 which can form a hip flap part of the folding sheet | seat 125 which has an adhesion part, a microcapsule, and an adhesion part. Sheets 129 are stacked to form a first laminated sheet 131.

Next, an adhesive is applied from the adhesive coating machine 133 on the first laminated sheet 131, and the absorbent body 135 is stacked thereon to form the second laminated sheet 137.
The absorber 135 is manufactured by an absorber manufacturing apparatus 139 known in the art, and the absorber manufacturing apparatus 139 is formed on the outer peripheral surface of the material supply unit 141, the suction drum 143, and the suction drum 143. A concave mold 145 and a suction part 146 are provided.

  Next, the second laminated sheet 137 is passed through the embossing device 147, the compressed portion 29 of the absorbent article 1 is formed on the second laminated sheet 137, and then the second laminated sheet 137 is passed through the through-hole forming machine 149, The 3rd lamination sheet 151 is formed by forming the opening part 35 of the absorbent article 1 there.

  Next, an adhesive is applied to the third laminated sheet 151 from the adhesive coating machine 153, and then the film 156 is unwound from the film roll 155 and stacked on the third laminated sheet 151, thereby stacking the fourth laminated sheet 151. A sheet 157 is formed. The film 155 forms the liquid-impermeable sheet 11 of the absorbent article main body 3 of the absorbent article 1 and the clothing contact sheet 21 of the side flap part 5 and the hip flap part 7.

The fifth laminated sheet 161 is formed by passing the fourth laminated sheet 157 through the embossing device 159 and pressing the fourth laminated sheet 157 in the thickness direction.
The fifth laminated sheet 161 is passed through a cutting device 163 provided with a cutter roll and an anvil roll, and the fifth laminated sheet 161 is cut at the boundary surface that partitions the absorbent article 1 and the trim portion to be cut. It isolate | separates into the goods 1 and a trim part (not shown).
The separated trim part is excised by sucking the clothing contact surface 22 with a suction device (not shown).

Hereinafter, although an example is given and this indication is explained, this indication is not limited to these examples.
[Production Example 1]
(1) Production of web Composite fiber (average fineness: 3.3 dtex, average fiber length: 38 mm) having polyethylene terephthalate as a core component and polyethylene as a sheath component, polyethylene terephthalate as a core component, and polyethylene as a sheath component From the mixture (mass ratio 4: 3) with the composite fiber (average fineness: 3.3 dtex, average fiber length: 51 mm), the web No. 1 (basis weight: 35 g / m ² ) was formed.
A composite fiber (average fineness: 1.7 dtex, average fiber length: 45 mm) having polyethylene terephthalate as a core component and polyethylene as a sheath component, and a composite fiber (average fineness: average fineness: polyethylene terephthalate as a core component and polyethylene as a sheath component) 2.3 dtex, average fiber length: 45 mm) (mass ratio 1: 1). 2 (basis weight: 25 g / m ² ) was formed.

(2) Fabrication of nonwoven web No. 1 and web no. 2 are stacked to form a stacked web, and according to the method described in Japanese Patent Application Laid-Open No. 2008-23311, skin contact sheet No. 1 having a ridge groove structure and a ridge groove structure is provided. 1 was formed.
Various settings in the nonwoven fabric manufacturing apparatus used are as follows.
Diameter of injection port 332: 1.0 mm (perfect circle)
The pitch of the injection holes 322: 3.0 mm
Injection gas temperature: 310 ° C
Air flow rate per jet port: 5 L / min Web conveyance speed: speed 100 m / min Breathable support member 310 (net-like support member): 70 mesh Heat treatment by heater unit 340: Heat treatment temperature 140 ° C., passing air speed Processing for 6 seconds at 1.2m / s

(3) Manufacture of absorbent article According to the manufacturing method shown in FIG. 1 was produced. The microcapsules contained menthol as a cooling sensation component, and were coated so that the basis weight was 1.5 g / m ² .
Absorbent article no. When the cross section of 1 side flap part was observed with the electron microscope, the fiber density of the fiber of the skin contact surface side of a skin contact sheet is more than the fiber density of the fiber of the non-skin contact surface side of a skin contact sheet it was high. Further, the fiber diameter of the fiber on the skin contact surface side of the skin contact sheet was smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet.
Moreover, the number density of the microcapsules on the skin contact surface side of the skin contact sheet was lower than the number density of the microcapsules on the non-skin contact surface side of the skin contact sheet. Moreover, the microcapsule was not present on the skin contact surface of the skin contact sheet.

[Production Example 2]
When manufacturing the nonwoven fabric, the web No. Same as Production Example 1 except that 1 was overlapped and that the coating pressure of the microcapsule coating machine was lowered and suction from the suction box was not performed when coating the microcapsules. Absorbent article No. 2 was produced. In Production Example 2, although the coating pressure of the microcapsule coating machine was reduced, the basis weight of the microcapsules was equivalent to that in Production Example 1.
Absorbent article no. When the cross section of 1 side flap part was observed with the electron microscope, the microcapsule had hardly entered the skin contact sheet. Moreover, the microcapsule was not present on the skin contact surface of the skin contact sheet.

[Example 1]
Absorbent article no. 1 and absorbent article no. 2 was worn, the absorbent article no. 1 is absorbent article No. 1; Compared to 2, it was quicker to feel cold and long time to remember.

DESCRIPTION OF SYMBOLS 1 Absorbent article 3 Absorbent article main-body part 5 Side flap part 7 Hip flap part 9 Liquid permeable sheet 11 Liquid impermeable sheet 13 Absorbent body 15 Skin contact surface 17 Skin contact sheet 19 Auxiliary sheet 21 Clothing contact sheet 22 Clothing contact surface 23, 25, 27 Adhesive part 29, 31, 33 Pressing part 35 Opening part 37, 39 Seal part 41 Folding part 43, 45 Gutter part 47, 49 Groove part 51, 53 Microcapsule existing area 55 Microcapsule 57 Non-skin contact surface 59, 63 Adhesion 61 Skin contact sheet side surface 65 Center surface

Claims (9)

An absorbent article comprising a skin contact sheet, a clothing contact sheet, and a microcapsule containing a cooling sensation component,
The skin contact sheet includes a fabric containing fibers, and the fiber density of the fibers on the skin contact surface side of the skin contact sheet is equal to the fiber on the non-skin contact surface side of the skin contact sheet. The skin contact sheet includes the microcapsules therein, and the number density of the microcapsules on the skin contact surface side of the skin contact sheet is equal to that of the skin contact sheet. Lower than the number density of microcapsules on the non-skin contact surface side,
The said absorbent article characterized by the above-mentioned.   The absorption according to claim 1, wherein the absorbent article further includes an adhesive portion coated on the skin non-contact surface of the skin contact sheet, and the adhesive portion holds the microcapsule. Sex goods.   The fiber diameter of the fiber on the skin contact surface side of the skin contact sheet is smaller than the fiber diameter of the fiber on the non-skin contact surface side of the skin contact sheet. Absorbent articles.   The absorptive article according to any one of claims 1 to 3 in which said absorptive article does not have said microcapsule in said skin contact surface of said skin contact sheet.   The absorbent article according to any one of claims 1 to 4, wherein 90% by mass or more of the microcapsules have a particle size of 40 µm or more and less than 80 µm.   The microcapsule includes a portion having a particle size of 40 μm or more and less than 60 μm and a portion having a particle size of 60 μm or more and less than 80 μm in a mass ratio of 4: 1 to 1: 4. The absorbent article as described in any one of these.   The absorbent article further includes an auxiliary sheet between the skin contact sheet and the clothing contact sheet, and the auxiliary sheet includes the microcapsule therein and the thickness of the skin contact sheet. The absorptive article according to any one of claims 1 to 6 containing with a number density smaller than a number density of said microcapsule between a central surface of a length direction, and said non-skin contact surface.   The absorptive according to claim 7, wherein the absorbent article further includes an adhesive part applied to a surface of the auxiliary sheet on the skin contact sheet side, which holds the microcapsules. Goods.   The absorbent article has an absorbent article body and a pair of flap portions extending from the absorbent article body to both sides in the width direction of the absorbent article, and the skin contact sheet and the clothing contact sheet The absorptive article according to any one of claims 1 to 8 which forms said pair of flap parts.

Images