JP7209423B2 - Pants-type absorbent article and method for manufacturing pants-type absorbent article - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pants-type absorbent article and a method for manufacturing a pants-type absorbent article.

Absorbent articles containing an absorbent body having a liquid-absorbing absorbent core and a cooling agent, a warming agent, or a fragrance for reducing discomfort felt by the wearer, etc., are already well known. there is

For example, Patent Literature 1 discloses that water-disintegrating microcapsules containing a warming agent are arranged on the surface sheet of an absorbent article so that the skin-facing side of the absorbent body can be applied at the timing of excretion of bodily fluids or the like. It is disclosed to suppress the discomfort caused by the wearer's perception of coldness without heating the absorbent body while diffusing a warming agent through the provided recessed portion.

In addition, Patent Document 2 discloses a technique for reducing unpleasant odors derived from excrement by applying a volatile fragrance to the outer surface or inner surface of the waist region of a pants-type absorbent article (pants-type wearing article). is disclosed.

JP 2019-187963 A JP 2018-102612 A

In the absorbent article of Patent Document 1, the warming agent is arranged in the portion facing the excretory part, and when body fluid such as urine and the warming agent come into contact with each other, the microcapsules enclosing the warming agent are disintegrated, resulting in a warm sensation. action works. In this way, if the microcapsules are provided in the portion facing the excretory part and the microcapsules are collapsed by urination (or menstrual blood, etc.), the functional material may be released excessively when the amount of urination is large. As a result, it is difficult to control the degree of warmth (or coldness). In addition, if a cold or warm sensation develops in the part that absorbs urine or menstrual blood, it may be misunderstood that the cold or warm sensation is caused by urine or menstrual blood, which may promote urination or blood discharge. There is

In addition, in the pants-type absorbent article disclosed in Patent Document 2, if the inner surface (skin side) or the outer surface (non-skin side) of the waist region 10 is provided with a fragrance (volatile substance), There is a risk that the fragrance will volatilize during the period from to the time the user actually uses it. There are cases.

The present invention has been made in view of the above-mentioned problems, and the object thereof is to provide a pants-type absorbent article that expresses the function of the cooling sensation ingredient contained in the microcapsules according to the perspiration of the body. It is to provide goods.

The main invention for achieving the above object is
having a vertical direction, a horizontal direction, and a front-back direction that intersect each other;
a liquid-absorbing absorbent body;
an exterior body provided to cover the non-skin side of the absorbent main body;
A pants-type absorbent article having
The outer body is joined at one end in the longitudinal direction of the absorbent main body, and is joined to the abdominal waist portion positioned on the abdomen side of the wearer when worn, and the other longitudinal end of the absorbent main body. a dorsal girth positioned on the dorsal side of the wearer when worn;
one end portion of the ventral waist portion in the left-right direction and one end portion of the dorsal waist portion in the left-right direction are joined by the first joint portion along the vertical direction;
The other lateral end of the ventral waist portion and the other lateral end of the dorsal waist portion are joined by a second joint portion along the vertical direction,
In the vertical direction, an existence region in which water-disintegrable microcapsules containing a cooling sensation component are present is provided above the lower ends of the first joint and the second joint, and the first joint and Below the lower end of the second joint is a non-existing area where the microcapsules do not exist,
The exterior body has a skin-side sheet and a non-skin-side sheet arranged on the non-skin side of the skin-side sheet,
Having a hydrophobic cover sheet arranged on the skin side of the skin side sheet so as to straddle the longitudinal end of the absorbent body,
The cover sheet is provided with the microcapsules,
Thread rubber that can expand and contract in the left and right direction is arranged in the vertical direction,
The thread rubber is provided between the skin-side sheet and the non-skin-side sheet,
A plurality of the rubber threads are provided between the upper end of the cover sheet and the upper end of the pants-type absorbent article in the vertical direction,
The outer body does not have a hydrophilic sweat-absorbing and moisture-releasing sheet provided on the skin side surface of at least one of the ventral waist portion and the back waist waist portion of the outer body.
A pants-type absorbent article characterized by:
Other features of the present invention will become apparent from the description of the specification and accompanying drawings.

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

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the pants|underpants type absorbent article which expresses the function of the cooling feeling component contained in the microcapsule according to perspiration of the body.

1 is a schematic perspective view of a pants-type absorbent article 1. FIG. 1 is a schematic plan view of the pants-type absorbent article 1 in an unfolded and stretched state, viewed from the skin side. FIG. 3A is a schematic cross-sectional view taken along the line AA in FIG. 2, and FIG. 3B is a diagram for explaining the three-dimensional gathers 50. FIG. Fig. 2 is a schematic plan view of the pants-type absorbent article 1 in an unfolded and stretched state, viewed from the non-skin side. FIG. 5A is a diagram for explaining a microcapsule application region 70 (70f) on the ventral waist portion 10f, and FIG. 5B is a diagram for explaining a microcapsule application region 70 (70b) on the back waist portion 10b. be. FIG. 10 is a diagram for explaining a modification of the microcapsule application area 70. FIG. FIG. 7 is a diagram showing an example of vertical positions of the abdominal and dorsal elastic members 13a and 13b in the first joint portion 10es1. FIG. 10 is a diagram for explaining a modification of the microcapsule application area 70. FIG. It is a schematic diagram showing a part of the production flow of the pants-type absorbent article 1 according to this embodiment. FIG. 3 is a schematic plan view showing a modification of the pants-type absorbent article 1 of this embodiment.

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
A pants-type absorbent article having vertical, horizontal, and longitudinal directions that intersect with each other, and has a liquid-absorbing absorbent main body and an exterior body provided to cover the non-skin side of the absorbent main body. In the article, the outer body is joined at one end side of the absorbent main body in the longitudinal direction, and includes an abdominal waist portion positioned on the abdomen side of the wearer when worn, and a dorsal waist portion that is joined to the other end side and positioned on the back side of the wearer when worn, and the first joint portion extending along the vertical direction allows the abdominal waist portion to move in the left-right direction. One end portion and one end portion of the dorsal waist portion in the lateral direction are joined, and the second joint portion extending along the vertical direction connects the other end portion of the ventral waist portion in the lateral direction to the back portion. The side waist portion is joined to the other end in the left-right direction, and in the vertical direction, the water-disintegrable water-disintegratable body containing a cooling sensation component is positioned above the lower ends of the first joint and the second joint in the vertical direction. An existence area where the microcapsules are present is provided, and the lower side of the first joint and the second joint is a non-existence area where the microcapsules do not exist. It is a sexual item.

According to such a pants-type absorbent article, the area above the lower end of the joint joining the abdominal and dorsal waist portions is a region where it is difficult to absorb urine and menstrual blood. By applying the microcapsules, moisture such as perspiration from the wearer's body or friction between the body and the absorbent article causes the microcapsules to collapse, thereby producing a cooling effect. Since the function of the cooling sensation component encapsulated in the microcapsules can be expressed in conjunction with perspiration of the body, the wearer's comfort is improved.

In such a pants-type absorbent article, the outer body has a hydrophilic sweat-absorbing and moisture-releasing sheet provided on the skin side surface of at least one of the ventral waist portion and the back waist waist portion of the outer body. preferably not.

According to such a pants-type absorbent article, since there is no hydrophilic sweat-absorbing and moisture-releasing sheet, moisture is less likely to be retained around the waist, air permeability can be maintained, and a cooling sensation effect can be maintained.

In such a pants-type absorbent article, a hydrophilic sweat-absorbing and moisture-absorbing sheet is provided on at least one skin side of the ventral waist portion and the back waist portion of the outer body, and the sweat-absorbing and moisture-releasing The sheet is coated with the microcapsules, and the sweat-absorbing/moisture-absorbing sheet has an unfixed portion that is not fixed to the side surface of the skin continuously in the left-right direction at least in the upper portion excluding the lower end portion. It is desirable that

According to such a pants-type absorbent article, the sheet to which the microcapsules are applied and the waist portion are not fixed in the left-right direction, and the unfixed portion is continuously provided in the upper portion of the sheet, so that the moisture release performance is improved. While keeping it, you can maintain the cooling effect of the microcapsules.

In such a pants-type absorbent article, it is desirable that a hot-melt adhesive is applied to the entire region overlapping with the existing region when viewed in the front-rear direction.

According to such a pants-type absorbent article, the microcapsules are prevented from coming off by providing a film of hot-melt adhesive over the entire region overlapping the microcapsule existing region.

In this underpants-type absorbent article, an application area coated with a hot-melt adhesive is provided continuously in the left-right direction in an upper portion of the existence area excluding at least a lower end portion when viewed in the front-rear direction. It is desirable that

According to such a pants-type absorbent article, if the hot-melt adhesive application area overlaps at least the upper part of the microcapsule-existing area when viewed in the front-rear direction, the microcapsules can be seen from above in the vertical direction. It can prevent falling off and maintain the cooling sensation effect.

In such a pants-type absorbent article, the outer body is formed of a nonwoven fabric having at least a meltblown layer, and the microcapsules are positioned closer to the skin than the meltblown layer of the nonwoven fabric when viewed in the front-rear direction. It is desirable that it is coated.

According to such a pants-type absorbent article, the meltblown layer made of ultrafine fibers has a high density, and it is possible to reduce the shedding of microcapsules to the outside (non-skin side) through the exterior body. As a result, the cooling sensation function is less likely to be lost.

In such a pants-type absorbent article, the ventral waist portion and the back waist portion have elastic members that are stretchable in the left-right direction, and when viewed in the front-rear direction, the elastic members and the existence region are formed. It is desirable to have an overlapping portion.

According to such a pants-type absorbent article, as the elastic member shrinks in the left-right direction, uneven wrinkles are generated in a natural state. It is possible to create a portion where the microcapsules are likely to collapse and a portion where it is difficult. Since the function can be expressed for a long time, comfort can be maintained.

In this pants-type absorbent article, a plurality of elastic members capable of stretching in the lateral direction are arranged in the vertical direction on the ventral waist portion and the back waist portion. It is desirable to have a region where the region between the elastic members adjacent to each other and the existence region overlap each other when viewed in the front-rear direction.

According to such a pants-type absorbent article, the area between the elastic members that are adjacent in the vertical direction is a portion that is relatively easy to come into contact with the body, and sweat tends to accumulate there. The presence of the microcapsules in that portion can provide a cooling sensation or the like when necessary.

In such a pants-type absorbent article, the ventral waist portion and the back waist portion have elastic members that are stretchable in the left-right direction, and when viewed in the front-rear direction, the existence area is the elastic member. It is desirable to have a portion arranged so as to straddle the vertical direction.

According to such a pants-type absorbent article, since the areas where the microcapsules and the elastic member overlap are in close contact with the skin, a strong cooling effect can be felt, and the areas where the microcapsules and the elastic member do not overlap strongly hit the skin. Therefore, the cooling effect can be weakened.

In the pants-type absorbent article, the abdominal waistline portion and the back waistline portion have at least a skin-side sheet and a non-skin-side sheet that constitute the abdomen waistline portion and the back waistline portion, respectively. and the ventral waist portion and the back waist portion are a plurality of elastic members that are stretchable in the left-right direction and provided side by side in the vertical direction between the skin-side sheet and the non-skin-side sheet. a region between the elastic members adjacent in the vertical direction and the existence region have a region in which the existence region overlaps when viewed in the front-rear direction, and a region between the elastic members adjacent in the vertical direction It is desirable that the skin-side sheet and the non-skin-side sheet are not joined in the region between them.

According to such a pants-type absorbent article, the space between the elastic members to which the skin-side sheet and the non-skin-side sheet of the exterior body are not joined serves as an escape passage for air, and sweat is generated between the elastic members. It becomes easier for later moist air to flow. A cooling effect is exhibited by the overlap between the elastic members and the microcapsules.

In such a pants-type absorbent article, it is desirable that the microcapsules are not applied to the first joint portion and the second joint portion.

According to such a pants-type absorbent article, when microcapsules are applied to each joint, the strength of each joint is reduced by the microcapsules when forming each joint. By not providing microcapsules in the part, strength can be maintained.

In such a pants-type absorbent article, when viewed in the front-rear direction, an overlapping region where the abdominal waistline portion or the dorsal waistline portion and the absorbent main body overlap each other has a portion that overlaps the existing region. It is desirable that

According to such a pants-type absorbent article, the above-described overlapping region is the region where the largest number of materials overlap and where sweating is likely to occur. By overlapping such overlapping regions and microcapsules, it is easy to develop a cooling effect and to easily obtain the effect.

In such a pants-type absorbent article, the abdominal waist portion has a hydrophobic abdominal cover sheet arranged so as to straddle the ends of the absorbent main body in the longitudinal direction, and the abdominal cover sheet is preferably coated with the microcapsules.

According to such a pants-type absorbent article, the portion where the hydrophobic abdominal cover sheet is arranged is the lower abdomen of the wearer who is likely to perspire due to breathing or the like while sitting. Being able to apply the microcapsules improves comfort. In addition, since the cover sheet is hydrophobic, air permeability can be maintained by allowing moisture to escape to the outside and preventing moisture from accumulating.

In such a pants-type absorbent article, the back waist portion has a hydrophobic back cover sheet arranged to straddle the ends of the absorbent main body in the longitudinal direction, and the back cover sheet is preferably coated with the microcapsules.

According to such a pants-type absorbent article, the part where the hydrophobic back cover sheet is arranged hits the recessed part of the buttocks where sweat tends to occur in the sleeping position, and the microcapsules can be applied to such a part. can improve comfort. In addition, since the cover sheet is hydrophobic, air permeability can be maintained by allowing moisture to escape to the outside and preventing moisture from accumulating.

In such a pants-type absorbent article, the ventral waist portion or the back waist portion has a hydrophobic cover sheet arranged to straddle the longitudinal ends of the absorbent main body, and the When viewed in the front-rear direction, an overlapping region of the cover sheet where the cover sheet and the absorbent body overlap is provided with a coating region in which the microcapsules are applied to the cover sheet. In view of the above, it is desirable that a non-overlapping region of the cover sheet where the cover sheet and the absorbent body do not overlap has a non-application region where the microcapsules do not exist.

According to such a pants-type absorbent article, if the entire surface of the cover sheet is coated with microcapsules, it is costly. It also leads to cost reduction.

In such a pants-type absorbent article, the ventral waist portion has a plurality of ventral elastic members that are stretchable in the left-right direction, and the back waist portion includes a plurality of stretchable backs that are stretchable in the left-right direction. a terminal position of one of the plurality of abdominal side elastic members and a terminal position of one of the plurality of dorsal elastic members are aligned in the vertical direction; Different directions are desirable.

According to such a pants-type absorbent article, the fact that the end positions are different in the vertical direction means that the elastic members are not continuous in the circumferential direction when worn. If it were continuous, it would be difficult for air to pass through, but because it is discontinuous, it would be easier for moisture to escape from the end portion. The cooling effect is improved by wicking away moisture from the end position of each elastic member.

In this pants-type absorbent article, the ventral waist portion and the back waist portion have elastic members that are stretchable in the left-right direction, and the elastic members are stretchable in the left-right direction. It is desirable to have a first region with stress and a second region with a second internal stress that is greater than the first internal stress.

According to such a pants-type absorbent article, the stress of the elastic member is partially different, so that the elastic member can be applied to the part where the elastic member is desired to be firmly applied to the skin to maintain adhesion, while allowing moisture to escape from the part where the stress is small. can be done.

In such an underpants-type absorbent article, it is desirable that the microcapsules are applied to the skin side of a sheet that can come into contact with the wearer's skin.

According to such a pants-type absorbent article, by applying it to the position closest to the skin, it is easy to come into contact with sweat, and it is easy to obtain the cooling sensation effect of the microcapsules.

In such a pants-type absorbent article, it is desirable that the microcapsules are applied to the non-skin side of the sheet that can come into contact with the wearer's skin.

According to such a pants-type absorbent article, the non-skin side of the sheet that can come into contact with the skin is, for example, between the skin side sheet and the non-skin side sheet of the outer packaging, or between the skin side of the outer packaging and the skin side of the outer packaging. It means that the microcapsules are present between the side sheet and the cover sheet. By coating the microcapsules between the two sheets, the microcapsules can be prevented from falling off. Also, by applying it to a sheet that can come into contact with the skin, the cooling sensation effect is improved.

In this underpants-type absorbent article, a post-treatment tape is provided on the non-skin side surface of the outer package, and the post-treatment tape overlaps the presence area when viewed in the front-rear direction. It is desirable to have

According to such a pants-type absorbent article, the post-treatment tape makes it difficult for the microcapsules containing the cooling sensation ingredient to pass through, so that the microcapsules do not fall off on the non-skin side in the portion overlapping the post-treatment tape. can be suppressed.

In such a pants-type absorbent article, it is desirable that a film sheet is provided on the non-skin side of the presence area when viewed in the front-rear direction.

According to such a pants-type absorbent article, the film sheet prevents permeation of the wearer's perspiration to the non-skin side, thereby facilitating contact between the perspiration and the microcapsules. Therefore, the cooling sensation effect can be improved.

Further, in the unfolded state, a liquid-absorbing absorbent main body having a longitudinal direction, a left-right direction, and a thickness direction that intersect with each other, and an outer body provided so as to cover the non-skin side surface of the absorbent main body. A method for producing a pants-type absorbent article having a step of applying water-disintegrable microcapsules containing a cooling sensation component to the skin side surface of the continuous body of the outer package continuous in the conveying direction; rotating the absorbent main body by 90 degrees, placing it on the skin side of the continuous body of the outer package coated with the microcapsules, and joining the absorbent main body to the continuous body of the outer package. A method for manufacturing a pants-type absorbent article characterized by:

According to such a method for producing a pants-type absorbent article, the outer body coated with the microcapsules is not rotated or transferred during the manufacturing process, thereby preventing the microcapsules from diffusing to areas other than the areas where the microcapsules are coated. can be prevented.

Further, in the unfolded state, a liquid-absorbing absorbent main body having a longitudinal direction, a left-right direction, and a thickness direction that intersect with each other, and an outer body provided so as to cover the non-skin side surface of the absorbent main body. , wherein the absorbent body is rotated by 90 degrees and arranged on the skin side of the continuous body of the outer body that is continuous in the conveying direction, and the continuous body of the outer body is arranged a step of joining the absorbent main body to the body; and applying a cooling sensation component to the skin side surface of the continuous cover sheet, which is a hydrophobic cover sheet covering at least a part of the skin side surface of the exterior body and which is continuous in the conveying direction. a step of applying water-disintegratable microcapsules to be included therein; and the continuous cover coated with the microcapsules so as to cover longitudinal ends of the absorbent main body joined to the continuous body of the exterior body. and a step of joining a sheet to the continuous body of the outer covering body continuous in the conveying direction.

According to such a method for producing a pants-type absorbent article, the cover sheet coated with the microcapsules is not rotated or transferred during the process, thereby preventing the microcapsules from diffusing to areas other than the areas where the microcapsules are coated. can be prevented.

===Embodiment===
Hereinafter, as an example of the pants-type absorbent article according to the present invention, a pants-type absorbent article 1 provided with microcapsules encapsulating a cooling sensation component, which will be described later, will be described. In the following description, disposable adult diapers will be described, but the absorbent article 1 of the present embodiment can also be applied to disposable diapers for infants, shorts-type sanitary napkins, and the like.

<Basic Configuration of Absorbent Article 1>
FIG. 1 is a schematic perspective view of a pants-type absorbent article 1. FIG. FIG. 2 is a schematic plan view of the pants-type absorbent article 1 in an unfolded and stretched state, viewed from the skin side. 3A is a schematic cross-sectional view taken along the line AA in FIG. 2, and FIG. 3B is a diagram for explaining the three-dimensional gathers 50. FIG. FIG. 4 is a schematic plan view of the pants-type absorbent article 1 in an unfolded and stretched state, viewed from the non-skin side.

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

In the unfolded state of the absorbent article 1 shown in FIG. 2 (the state in which the pants-type absorbent article 1 is spread out on a plane before being molded into a pants-type), the absorbent article 1 has "longitudinal directions" that intersect each other. It has a “width direction” (corresponding to the left-right direction described above) and a “thickness direction”. Then, the vertical direction of the paper surface in FIG. 2 is the longitudinal direction, the upper side (lower side) of the paper surface is the “ventral side” (“dorsal side”) of the longitudinal direction, and the direction orthogonal to the longitudinal direction on the paper surface is the width direction. The left side (right side) of the paper is defined as the left side (right side) in the width direction. In addition, the direction perpendicular to the longitudinal direction and the width direction (the direction penetrating the paper surface) is the thickness direction, and in the thickness direction, the side that contacts the wearer's skin is the "skin side", and the opposite side is the "non-skin side". skin side”. The thickness direction also corresponds to the front-rear direction in the underpants-type state when worn as shown in FIG.

Note that the plan view (for example, FIG. 2) according to the present embodiment shows an expanded state of the object. Here, the term “stretched state” means that each elastic body (for example, the ventral elastic member 13a, the dorsal elastic member 13b, the central elastic member 25, etc., which will be described later) provided in the absorbent article 1 is stretched so that It is a state in which the member shown is stretched without wrinkles. For example, in FIG. 2, it refers to a state in which the dimensions of the outer body 10, the absorbent main body 20, etc., which constitute the absorbent article 1, which will be described later, are the same as or close to the dimensions of the individual members. . The non-stretched state in which each elastic body naturally contracts and wrinkles or the like appear in the members shown in the plan view is referred to as the "natural state."

The absorbent article 1 according to this embodiment includes an outer body 10 and a liquid-absorbing absorbent main body 20, and the outer body 10 is provided so as to cover the non-skin side of the absorbent main body 20. there is Below, first, the process in which the absorbent article 1 becomes a pants-type state will be described.

In the absorbent article 1, as shown in FIG. 2, the outer body 10 has a ventral waist portion 10f, a back waist portion 10b, and a crotch portion 10m in the longitudinal direction. The ventral waist portion 10f is a portion to which one longitudinal end side (end portion 20ef) of the absorbent main body 20 is joined, and which is located on the ventral side of the wearer when the absorbent article 1 is worn. The back waist portion 10b is a portion to which the other longitudinal end side (end portion 20eb) of the absorbent main body 20 is joined and which is located on the back side of the wearer when the absorbent article 1 is worn. A crotch portion 10m is provided between the ventral waist portion 10f and the back waist portion 10b.

Then, from the unfolded state of FIG. 2, the absorbent main body 20 and the exterior body 10 are folded in half with the central position CL in the longitudinal direction (vertical direction) as the folding position. In the folded state, one end 10fa in the left-right direction of the ventral waist portion 10f and one end 10ba in the left-right direction of the back waist portion 10b are joined by a first joint portion 10es1 along the vertical direction. The other left-right end 10fb of the ventral waist portion 10f and the other left-right end 10bb of the back waist portion 10b are joined by a second joint portion 10es2 along the . As a result, the ventral waist portion 10f and the back waist portion 10b are connected in an annular fashion to form one waist opening BH and a pair of leg openings LH, LH as shown in FIG. It becomes the sexual article 1.

Moreover, the exterior body 10 which concerns on this embodiment has the skin side sheet 11 and the non-skin side sheet 12 arrange|positioned at the non-skin side of the skin side sheet 11, as shown in FIG. In this embodiment, the skin-side sheet 11 and the non-skin-side sheet 12 can be formed of, for example, a spunbond nonwoven fabric, an SMS nonwoven fabric (spunbond/meltblown/spunbond nonwoven fabric), or the like. Further, the outer edge (upper edge) of the non-skin side sheet 12 in the longitudinal direction is folded back toward the skin side. The folded portion of the non-skin-side sheet 12 wraps around one end (outer end) of the skin-side sheet 11 in the longitudinal direction. The outer edge (upper edge) of the non-skin side sheet 12 in the longitudinal direction may be configured so as not to be folded back.

The exterior body 10 (the skin-side sheet 11 and the non-skin-side sheet 12) as a whole has a substantially hourglass shape as shown in FIG. That is, the exterior body 10 has a recessed portion 10c that is recessed inward in the left-right direction at the center portion in the longitudinal direction of the crotch portion 10m.

A plurality of ventral elastic members 13a such as thread rubbers that can be stretched in the left-right direction are arranged in the vertical direction on the ventral waist portion 10f of the outer body 10. As shown in FIG. Similarly, a plurality of back elastic members 13b, such as thread rubbers that are stretchable in the left and right direction, are arranged in a vertical direction in a state of being stretched in the left and right direction on the back waist portion 10b of the outer body 10. . The abdominal and dorsal elastic members 13a and 13b are sandwiched between the skin-side sheet 11 and the non-skin-side sheet 12 while being stretched in the left-right direction. Elasticity in the lateral direction is imparted to the ventral waist portion 10f and the back waist portion 10b by 13a and 13b.

Further, as shown in FIG. 2, the outer body 10 is provided with a plurality of ventral leg elastic members 14a and a plurality of dorsal leg elastic members 14b between the skin side sheet 11 and the non-skin side sheet 12. It is At least a part of the ventral leg elastic member 14 a and the dorsal leg elastic member 14 b is curved along the recess 10 c of the exterior body 10 . Specifically, from both side ends 10fR of the ventral waistline part 10f and both side ends 10bR of the back waistline part 10b in the left-right direction, each ventral and back waistline part 10f, 10b is longitudinally inward and It curves obliquely downward toward the inside in the left-right direction, and the central portion in the left-right direction also curves toward the inside in the longitudinal direction and the inside in the left-right direction. In the present embodiment, the dorsal leg elastic member 14b has a portion that curves to the ventral side beyond the longitudinal center CL of the exterior body 10 at the center portion in the left-right direction. The ventral and dorsal leg elastic members 14a and 14b may be, for example, a plurality of rubber threads or a belt-like elastic sheet having stretchability. The ventral and dorsal leg elastic members 14a and 14b are joined and fixed with an adhesive such as a hot-melt adhesive in a stretched state.

As shown in FIG. 3, the absorbent main body 20 is provided on the skin side of the exterior body 10, and comprises a liquid absorbent absorbent (absorbent core) 21 and a core wrap sheet 22 covering the outer peripheral surface of the absorbent 21. , a top sheet 23 and a back sheet 24 .

The absorbent core 21 is a member formed by laminating liquid absorbent materials, and is capable of absorbing excrement such as urine. As the liquid-absorbent material, for example, liquid-absorbent fibers such as pulp fibers, superabsorbent polymers, and the like can be used. In addition, the shape of the absorbent core 21 is not limited to the shape extending along the longitudinal direction and having a constricted portion on the inner side in the width direction as shown in FIG. etc. is fine.

Examples of materials suitable for the core wrap sheet 22 include tissue paper and non-woven fabric. However, these core wrap sheets 22 are not an essential component.

The top sheet 23 is a sheet that forms a skin-contacting surface that can come into direct contact with the wearer's skin, and is, for example, a liquid-permeable nonwoven fabric having a plane size larger than that of the absorbent core 21 .

The back sheet 24 is a liquid-impermeable sheet that covers the absorbent core 21 from the non-skin side. The widthwise dimension of the backsheet 24 is sufficiently larger than that of the absorbent core 21, and both ends in the widthwise direction of the backsheet 24 extend in the left-right direction with the positions forming the left-right ends 20e of the absorbent main body 20 as folding positions. folded to the center side (inside) of the A liquid-impermeable leak-proof sheet or the like may be further provided between the core wrap sheet 22 and the back sheet 24 .

In addition, the absorbent main body 20 has a central elastic member 25 such as a plurality of rubber threads arranged along the longitudinal direction of the absorbent core 21 at the central portion in the left-right direction. The central elastic member 25 is provided between the non-skin side surface of the core wrap sheet 22 and the back sheet 24 in the thickness direction. In this embodiment, four central elastic members 25 are provided, but the number is not limited to this, and may be singular or plural. Further, the central elastic member 25 is not limited to a rubber thread or the like, and may be, for example, a belt-like elastic sheet having stretchability. Incidentally, in FIG. 2 , a portion of the central elastic member 25 exhibiting stretchability (a portion having a so-called effective length) is indicated by a dashed line. The central elastic member 25 imparts stretchability in the longitudinal direction to the absorbent article 1, making it easier to pull up the crotch area and improving the fit of the crotch area.

In addition, in the absorbent article 1 of the present embodiment, the side sheets 26 form a pair of standing upright gathers 50 on the skin side in the thickness direction (Fig. 3A). The pair of three-dimensional gathers 50 are provided along the longitudinal direction on both lateral sides of the absorbent main body 20 when viewed in the thickness direction, and have a plurality of elastic members 27 that expand and contract in the longitudinal direction. As shown in FIGS. 3A and 3B, the three-dimensional gathers 50 are formed from laterally outer portions of the side sheets 26 . First, as shown in FIG. 3B(a), the three-dimensional gathers 50 are arranged such that the side sheets 26 in the folded state extend outward in the left-right direction from the top sheet 23 by a predetermined length (26L). The sheet 23 is overlaid from the skin side. The side sheet 26 is joined to the left and right ends of the top sheet 23 along the longitudinal direction at joints 26A. Then, the portion of the predetermined length 26L that is not joined is folded back toward the skin side in the thickness direction and inward in the left-right direction with the fulcrum 26S1 as the bending starting point (see FIG. 3B (b)). A three-dimensional gather 50 is formed. That is, the joint portion 26A joined to the left-right end portion of the top sheet 23 functions as the base end portion of the three-dimensional gathers 50, and the portion further to the left-right direction tip side than the base end portion (26A) is a free end. The part 26f can stand up (see FIG. 3B(c)). A plurality of elastic members 27 such as rubber threads along the longitudinal direction of the absorbent main body 20 are fixed to the pair of three-dimensional gathers 50 while being stretched in the longitudinal direction. The free end portion 26f stands on the wearer's skin side due to the longitudinal elasticity of the member 27. As shown in FIG. As a result, the three-dimensional gathers 50 function as a leak-proof wall for suppressing lateral leakage of excreted liquid or the like.

Further, as shown in FIG. 4 , a post-treatment tape 40 may be provided on the non-skin side surface of the back waist portion 10b of the outer body 10 . The post-treatment tape 40 is an elongated tape-like member having an adhesive surface. When the absorbent article 1 after use is discarded, the post-treatment tape 40 is folded against the absorbent article 1 rolled up in the longitudinal direction. 40 can be stretched and the adhesive surface side wound around the absorbent article 1 to hold the absorbent article 1 in a rolled state.

In addition, as shown in FIG. 2, the ventral waist portion 10f of the outer body 10 includes a band-shaped hydrophobic ventral cover sheet arranged from the skin side so as to straddle the longitudinal ends 20ef of the absorbent main body 20. As shown in FIG. 60f (shaded area in FIG. 3). Furthermore, in the back waist portion 10b of the outer body 10, a belt-like hydrophobic back cover sheet 60b (see FIG. 3) is arranged from the skin side so as to straddle the longitudinal end 20eb of the absorbent main body 20. hatched area). Each of the cover sheets 60f and 60b may be joined to the skin-side sheet 11 of the exterior body 10 by adhesion, welding, or the like.

Here, the above "hydrophobicity" means that liquid does not spread on the surfaces of the respective ventral and dorsal cover sheets 60f, 60b and the surfaces of the ventral and dorsal cover sheets 60f, 60b are more than 90°. It means having a large contact angle. The contact angle is a liquid contour curve and a contact angle in a state in which water (droplets) dropped on the horizontal surface is brought into contact with the ventral and dorsal cover sheets 60f and 60b having a horizontal surface (horizontal surface). It is the angle formed by the tangent of the profile curve at the point of intersection with the horizontal plane and the horizontal plane. Each ventral and dorsal coversheet 60f, 60b has a contact angle greater than 90° and has a hydrophobic surface. Conversely, if the contact angle is less than 90°, it is determined to be hydrophilic with a high degree of hydrophilicity. have.

The cover sheets 60f and 60b also play a role in mitigating the tight contact of the ends 20ea and 20eb of the absorbent body 20 with the wearer's skin. is used. In addition, a hydrophobic sheet is preferable in order to allow moisture to escape and improve breathability without retaining body fluids such as perspiration. As a result, it is possible to reduce the feeling of stuffiness at the part where the ventral side and back side cover sheets 60f, 60b come into contact with the skin.

In this embodiment, the absorbent article 1 includes water-disintegrable microcapsules encapsulating a cooling sensation component that imparts a cooling sensation to the wearer on the abdominal cover sheet 60f and the back cover sheet 60b. FIG. 5A is a diagram for explaining a microcapsule application region 70 on the ventral waist portion 10f, and FIG. 5B is a diagram for explaining a microcapsule application region 70 on the back waist portion 10b. The application area 70 is indicated as an application area 70f in the ventral waist portion 10f and as an application area 70b in the back waist portion 10b.

As shown in FIG. 5A, the ventral side cover sheet 60f of the absorbent article 1 of the present embodiment has a coating region 70f in which water-disintegrable microcapsules containing a cooling sensation component are coated in a band shape in the left-right direction. ing. In the present embodiment, a plurality of application regions 70f are arranged at intervals in the longitudinal direction, but the shape and number of application regions 70f are not limited to this. For example, the application area of the microcapsules may be arranged in a planar, linear, spiral, Z-shaped, linear, dot-shaped, or other shape. Further, in the present embodiment, all the application areas 70f are provided so as not to reach both ends in the left-right direction of the absorbent article 1, but the length of the application areas 70f in the left-right direction is not limited to this. longer or shorter. However, it is preferable that the microcapsules are not applied to the first joint portion 10es1 and the second joint portion 10es2. When microcapsules are applied to each of the first joints 10es1 and the second joints 10es2, the strength of the joints may be reduced by the microcapsules when forming the joints 10es1 and 10es2. By not providing the microcapsules in the joints 10es1 and 10es2, the strength of the joints 10es1 and 10es2 can be maintained. Details of the microcapsules will be described later.

The portion of the absorbent article 1 where the abdominal cover sheet 60f is arranged is the lower abdomen where the wearer tends to perspire due to breathing or the like while sitting. Since the ventral cover sheet 60f is coated with microcapsules, the microcapsules can be applied to the lower abdomen, and the cooling effect improves comfort. In addition, since the belly side cover sheet 60f is hydrophobic, it allows moisture to escape to the outside and prevents moisture from being retained, thereby maintaining air permeability and improving the cooling effect.

Further, as shown in FIG. 5B, the back cover sheet 60b also has an application area 70b (shaded area in FIG. 5B) in which water-disintegrable microcapsules containing a cooling sensation ingredient are applied in a strip shape in the left-right direction. have. The part where the back cover sheet 60b is arranged in the absorbent article 1 corresponds to the hollow part of the buttocks where the wearer tends to sweat in the sleeping posture, and by applying the microcapsules to this part, a cooling sensation effect can be obtained. Improves comfort. Similarly, since the back side cover sheet 60b is hydrophobic, air permeability can be maintained by allowing moisture to escape to the outside and preventing moisture from accumulating. This improves the cooling effect.

Also, the microcapsules enclosing the cooling sensation component are preferably applied to the skin side surfaces of sheets (here, the ventral cover sheet 60f and the back cover sheet 60b) that can come into contact with the wearer's skin. By applying it to the position closest to the skin, it is easy to contact with sweat and it is easy to obtain the effect of microcapsules.

In addition, the microcapsules encapsulating the cooling sensation component are applied not only to the skin side of the sheet (here, the ventral cover sheet 60f and the dorsal cover sheet 60b) that can come into contact with the wearer's skin, but also to the non-skin side. may have been That is, it may be applied between the skin-side sheet 11 of the exterior body 10 and the ventral-side cover sheet 60f (back-side cover sheet 60b). Alternatively, even if the skin side surface of the skin side sheet 11, which is the skin side of the exterior body 10, is directly coated without the ventral side and back side cover sheets 60f, 60b, etc., the skin side sheet 11 of the exterior body 10 may be and the non-skin side sheet 12. By applying the microcapsules between the two sheets, it is possible to prevent the microcapsules from coming off.

In this embodiment, the microcapsules are applied to both the ventral cover sheet 60f and the dorsal cover sheet 60b, but the present invention is not limited to this, and the application area 70 may be provided only on either sheet. .

In addition, in this embodiment, the microcapsules are provided on the ventral cover sheet 60f and the dorsal cover sheet 60b arranged in the outer body 10, but the absorbent article 1 is a pants-type absorbent article. Also, when the absorbent article 1 is folded in three and packed, the microcapsules may fall off toward the absorbent main body 20 . Therefore, the absorbent body 20 may substantially contain microcapsules with a probability of less than 1%. The area is not included in the coating area 70 described above.

<Chilling component>
The aforementioned cooling ingredients include those known in the art as cooling agents. The cooling agent is a volatile substance, preferably one that acts on the receptor-activated channel (TRPM8) in nerves of the skin, for example. Such cooling agents include, for example, menthol (eg, l-menthol) and its derivatives (eg, menthyl lactate), methyl salicylate, camphor, cucumber extract, essential oils derived from plants (eg, mint, eucalyptus, nutmeg). etc. Also, the cooling agent may lower the ambient temperature by the heat of vaporization. Such cooling agents include, for example, alcohols such as methanol and ethanol.
<Microcapsules>

As used herein, microcapsules refer to capsules having a diameter of 1 to 1,000 μm and a space containing a core material (cooling component). The outer shape of the capsule is not particularly limited as long as it can contain the core material and control the release of the core material. In addition, the capsule may be a mononuclear type having one space for holding a core material, a multinuclear type having a plurality of spaces for holding a core material, a structure in which a fine particle core substance is dispersed inside a particle, or a liquid form. It can be a matrix type of structure impregnated with a core substance. Examples of the shape of the space include a spherical shape, an irregular shape, and the like.

In a microcapsule, a membrane material (wall material) enclosing (or containing) a core material is changed by a chemical stimulus to release the enclosed (or contained) components. Examples of chemical stimulation include contact between a liquid (aqueous solution) such as body fluid and the wall material of the microcapsules.

By applying these chemical stimuli to the wall material of the microcapsules, the wall material can be collapsed. This can either initiate the release of the core material within the microcapsules, or accelerate the extent of its release if it was gradual prior to stimulation. When the microcapsules are water-disintegratable as in the present invention, it means that the microcapsules disintegrate to such an extent that they release the contained cooling sensation component upon contact with a liquid (bodily fluid) such as perspiration. Specifically, when the wall material of the microcapsules dissolves in water and disintegrates, when the microcapsules come into contact with the liquid, the microcapsules swell with water and their strength decreases, and the microcapsules are destroyed. For example, it may collapse.

In the absorbent article 1 of the present embodiment, when the microcapsules disintegrate by dissolving in water, the microcapsules are preferably 10 to 300 g, more preferably 20 to 100 g of water at 25 ° C. It has a water solubility of 200 g, and more preferably in the range of 30-100 g. The above water solubility was determined according to the OECD Guideline No. 1, except that the test temperature was 25°C. Measured according to the 105 flask method.

In addition, the microcapsules are preferably insoluble in the solvent that is the dispersion medium for the microcapsules, and preferably do not swell in the solvent that is the dispersion medium for the microcapsules. This is from the viewpoint of protection of the contained cooling sensation component. Materials for water-disintegrable microcapsules include, for example, sugars such as monosaccharides (e.g., glucose), disaccharides (e.g., sucrose), polysaccharides (e.g., dextrin, glucomannan, sodium alginate, water-soluble starch, etc.), cyclic oligosaccharides (cyclodextrin), gelatin, water-soluble polymers (eg, polyvinyl alcohol, polyvinyl acetate, etc.), and the like.

The microcapsules are commercially available, for example, INCAP (trademark) available from Symrise.

In addition, the microcapsules are produced by dissolving the material of the microcapsules in water to form an aqueous solution, mixing the cooling sensation component and the surfactant in the aqueous solution, and drying under reduced pressure while spraying the aqueous solution. can be done.

The solvent, which is the dispersion medium for the microcapsules, is preferably a solvent that retains the cooling sensation component as it is contained in the microcapsules. For such solvents, reference can be made to Japanese Patent Publication No. 2016-13154.

As an example of a method for visually confirming the application area of the microcapsules, when the microcapsules are formed from water-soluble starch, the application area can be colored with iodine or the like.

In the present embodiment, microcapsules encapsulating a cooling component are applied to the ventral side cover sheet 60f of the ventral waist portion 10f and the dorsal side cover sheet 60b of the dorsal waist portion 10b to impart a cooling effect. However, if a microcapsule encapsulating a cooling component as described above is placed opposite the excretory part, and body fluids such as urine and menstrual blood come into contact with the microcapsule, the cooling effect will be expressed. In this case, if the amount of body fluid is large, there is a possibility that the cooling sensation component may be excessively released. In addition, when a cold sensation develops in the excretory part-facing portion after the body fluid is generated, there is a risk of further urination and blood discharge, which may be misunderstood as being caused by urine or menstrual blood.

In this regard, the ventral cover sheet 60f and the back cover sheet 60b face the wearer's lower abdomen and buttocks, respectively, and the moisture such as sweat generated by friction between the body and the absorbent article 1 disintegrates the microcapsules. can be made In addition, not only the portion where the abdominal cover sheet 60f and the dorsal cover sheet 60b are located, but also the cooling sensation may be provided above the lower end of the first joint portion 10es1 and the second joint portion 10es2 in the vertical direction of the absorbent article 1. By providing an existence region where microcapsules containing the component are present and below the lower ends of the first joint portion 10es1 and the second joint portion 10es2 as a non-existence region where the microcapsules do not exist, the wearer sweats. It is possible to express a cooling sensation effect in accordance with. That is, the area above the lower ends of the first and second joints 10es1 and 10es2 joining the ventral waistline 10f and the dorsal waistline 10b is a region where it is difficult to absorb urine and menstrual blood. By applying water-disintegratable microcapsules to the area, the microcapsules can be disintegrated by moisture such as perspiration of the wearer's body or sweat generated by friction between the body and the absorbent article 1. Since the function of the cooling sensation component contained in the microcapsules can be expressed in accordance with the perspiration of the body, the wearer's comfort is improved.

In addition, as described above, the skin-side sheet 11 and the non-skin-side sheet 12 of the exterior body 10 can be, for example, spunbond nonwoven fabrics, SMS nonwoven fabrics (spunbond/meltblown/spunbond nonwoven fabrics), etc. At least meltblown nonwoven fabrics can be used. It is particularly preferred that it is formed from a nonwoven fabric having layers. Then, it is preferable to apply the microcapsules on the skin side of the meltblown layer of the nonwoven fabric when viewed in the thickness direction (the front-rear direction when worn). Since the meltblown layer is composed of ultrafine fibers, it has a high fiber density, which can reduce the dropout of microcapsules to the outside (non-skin side) through the exterior body 10. - 特許庁As a result, the cooling sensation function is less likely to be lost.

Further, as shown in FIGS. 5A and 5B, the ventral waist portion 10f and the back waist portion 10b of the absorbent article 1 are elastic members (abdominal and back elastic members 13a, 13b) capable of expanding and contracting in the lateral direction, respectively. )have. In FIG. 5A, the ventral waist portion 10f has a portion 701 where the ventral elastic member 13a and the application area 70f, which is the area where the microcapsules exist, overlap when viewed in the thickness direction. Also in FIG. 5B, similarly, the dorsal waist portion 10b has a portion where the dorsal elastic member 13b and the application region 70b where the microcapsules exist overlap when viewed in the thickness direction ( Of the three coating regions 70b arranged in the vertical direction, the two coating regions 70b on the outside in the longitudinal direction correspond to this). As the ventral and dorsal elastic members 13a and 13b contract in the left-right direction, uneven wrinkles are generated in the ventral and dorsal waist portions 10f and 10b in a natural state, and the unevenness makes it easy for the wearer to touch the body. It is possible to form a portion where it is difficult for the microcapsules to collapsing, that is, a portion where the microcapsules are likely to collapse and a portion where it is difficult for the microcapsules to collapse. As a result, the cooling sensation function can be exhibited for a long period of time, so that comfort can be maintained.

In addition, as shown in FIG. 5A, the ventral waist portion 10f has an area between vertically adjacent ventral elastic members 13a and a coating area 70f where microcapsules are present, as viewed in the thickness direction. It has regions 702 and 703 that overlap each other. In FIG. 5B as well, of the coating regions 70b, the innermost coating region 70b in the longitudinal direction corresponds to the overlapping region 702 (703). A region (for example, a region 13as) between the abdominal elastic members 13a (dorsal elastic members 13b) adjacent to each other in the vertical direction is a portion that is relatively easy to come into contact with the body, and sweat tends to accumulate. The presence of microcapsules encapsulating a cooling sensation component in such a portion makes it possible to impart a cooling sensation effect when necessary in accordance with perspiration.

In addition, the ventral elastic member 13a and the dorsal elastic member 13b are provided between the skin-side sheet 11 and the non-skin-side sheet 12 constituting the outer body 10 at the ventral waist portion 10f and the dorsal waist portion 10b, respectively. Although they are joined in a vertically aligned state, in a region between vertically adjacent elastic members (abdominal elastic members 13a or dorsal elastic members 13b), the skin-side sheet 11 and The non-skin side sheet 12 is not joined. In other words, the skin-side sheet 11 and the non-skin-side sheet overlap the abdominal and dorsal elastic members 13a and 13b by adhesive such as hot melt applied to the respective abdominal and dorsal elastic members 13a and 13b. are spliced. On the other hand, as shown in FIG. 5A, for example, if the region between the abdominal elastic members 13a adjacent in the vertical direction is defined as a region 13as, the skin-side sheet 11 and the non-skin-side sheet 12 are separated from each other in the region 13as. Not spliced. The absorbent article 1 of the present embodiment has a region where the region 13as and the microcapsule existing region (coating region 70f in FIG. 5A) overlap when viewed in the thickness direction. Between the elastic members (abdominal elastic member 13a, dorsal elastic member 13b) where the skin-side sheet 11 and the non-skin-side sheet 12 are not joined, air escapes between the elastic members. Moist air flows easily. By overlapping the region 13as between the elastic members and the region where the microcapsules exist (coating region 70f), the cooling effect is easily generated, and the cooling effect is diffused by the flow of air. and improve comfort.

FIG. 6 is a diagram for explaining a modification of the microcapsule application area 70. As shown in FIG. In addition, in FIG. 6, only one ventral elastic member 13a and the application area 70 are shown in order to make it easy to understand the state in which the microcapsules are applied. In this modified example, water-disintegratable microcapsules containing a cooling component are arranged so as to straddle the ventral elastic member 13a in the vertical direction. As a result, an overlapping portion NB where the microcapsule existing region (application region 70) and the ventral elastic member 13a overlap, and a non-overlapping portion NN where the microcapsule existing region (application region 70) and the ventral elastic member 13a do not overlap are formed. It is formed. By forming the overlapping portion NB and the non-overlapping portion NN, in the overlapping portion NB, the microcapsules are in close contact with the skin when worn, so that a strong cooling effect can be felt, and the non-overlapping portion NN is Since the microcapsules do not strongly hit the skin when worn, the cooling effect can be weakened. In addition, the part that touches the skin can feel the cooling effect quickly, and the part that does not touch the skin can develop the cooling effect over time, so that the cooling effect can be maintained for a long time.

FIG. 7 is a diagram showing an example of vertical positions of the abdominal and dorsal elastic members 13a and 13b in the first joint portion 10es1. In FIG. 7, other members constituting the absorbent article 1 are omitted in order to facilitate understanding of the positional relationship between the abdominal and dorsal elastic members 13a and 13b. In addition, in FIG. 7, a first joint portion 10es1 where one end portion 10fa in the left-right direction of the abdominal waist portion 10f and one end portion 10ba in the left-right direction of the back waist portion 10b are joined is shown in the center. The elastic member 13a and the back side elastic member 13b are shown as viewed from the outside of the absorbent article 1. FIG. At the first joint portion 10es1, the end positions of the ventral elastic member 13a and the dorsal elastic member 13b are vertically aligned, so that the elastic members (13a, 13b) are continuous in the circumferential direction around the waist of the absorbent article 1. However, as shown in FIG. 7, the terminal position T1 of the abdominal elastic member 13a1 among the plurality of abdominal elastic members 13a and the dorsal elastic member 13b among the plurality of dorsal elastic members 13b. The end position T2 of the member 13b1 may differ in the vertical direction. That the end positions T1 and T2 are different in the vertical direction means that the elastic members (13a, 13b) are not continuous in the circumferential direction of the absorbent article 1 when the absorbent article 1 is worn. If the ventral side and dorsal side elastic members (13a, 13b) were continuous in the circumferential direction, it would be difficult for the air to escape. can escape. Excessive accumulation of moist air in the ventral and dorsal waist parts 10f, 10b makes it difficult to feel the cooling sensation effect, but the cooling sensation effect is improved by releasing moisture from the terminal positions T1 and T2. .

The ventral and dorsal elastic members 13a and 13b of the present embodiment exhibit stretchability up to the first joint portion 10es1, but are not limited to this. The length in the left-right direction (designated effective length) in which the abdominal and dorsal elastic members 13a and 13b exhibit stretchability may be shortened so that the effective length does not reach the first joint portion 10es1. As a result, the ventral side and back side elastic members 13a and 13b are no longer continuous in the circumferential direction of the waist of the absorbent article 1, and an air escape route is formed.

Moreover, it is preferable that the elastic members used as the abdominal side and back side elastic members 13a and 13b have partially different internal stresses in the lateral direction of the absorbent article 1 . Specifically, the elastic members (abdominal and dorsal elastic members 13a and 13b) used for the ventral waist portion 10f and the back waist portion 10b apply a certain internal stress (first internal stress) in the lateral direction. and a second region having another internal stress (second internal stress) greater than the first internal stress. The term "internal stress" as used herein refers to the force (ie, contractile force) that causes the elastic member to return from the stretched state to its original state. An example of an elastic member having such different internal stresses is LYCRA (registered trademark), which is composed of stretchable fibers having crimpability (characteristic in which each fiber is shrunk and wound). . When the fibers forming the elastic member have crimping properties, the elastic member itself is twisted, and the internal stress in one elastic member becomes partially different. Moreover, not limited to this, elastic members having partially different internal stresses are arranged in the abdominal waistline portion 10f (or back waistline portion 10b) in the manufacturing process of the absorbent article 1, for example. Sometimes, the degree of stretch of the elastic member is changed by changing the conveying speed of the elastic member, and the portion where the elastic member is joined in a more stretched state (corresponding to the aforementioned second region having the second internal stress); A portion (corresponding to the first region having the first internal stress described above) that is joined in a slightly loosened state is formed, and when the absorbent article 1 is placed in a natural state, a difference in internal stress is generated. It can also be formed by a method such as

The stress difference between the first region having the first internal stress defined in this embodiment and the second region having the second internal stress can be examined using a known tensile tester. For example, a sample piece is collected from the absorbent article 1 in a state including a predetermined length (for example, 50 mm) of the abdominal elastic member 13a, and a predetermined portion of the abdominal elastic member 13a of the sample piece is tested by a tensile tester. The sample piece is gripped by a pair of chucks so that the interval in the left-right direction (stretching direction) is 10 mm, and in this state, the sample piece is pulled at a predetermined pulling speed until the interval between the gripped chucks becomes 15 mm. The force with which the sample piece tries to return to its original state at this time is measured. In a similar manner, several points on the same sample piece are compared, and the area where the restoring force is greater than the first predetermined area (the above-mentioned first area) is taken as the above-mentioned second area.

In this way, since the internal stresses of the elastic members (abdominal and dorsal elastic members 13a and 13b) are partially different, the portion (second region) where the internal stress is large comes into contact with the skin while maintaining adhesion and providing a cooling sensation effect. can be easily felt, and moisture can escape from the portion (first region) where the internal stress is small.

FIG. 8 is a diagram illustrating a modification of the microcapsule application area 70. In FIG. The microcapsule application area 70f' in FIG. 8 is provided in the central portion in the left-right direction of the ventral cover sheet 60f of the ventral waist portion 10f. When viewed in the thickness direction (the direction penetrating through the paper surface), the overlapping region NA where the ventral waistline portion 10f and the absorbent main body 20 overlap is a portion that overlaps the application region 70f′ (existence region) of the macrocapsules. have NCs. Of the abdominal waistline portion 10f of the absorbent article 1, the overlapping area NA where the abdominal waistline portion 10f and the absorbent main body 20 overlap has the number of overlapping materials because the outer packaging 10 and the absorbent main body 20 overlap each other. is the most abundant and perspiration-prone area. By overlapping the overlapping area NA and the microcapsule application area 70f', the overlapping portion NC is likely to exhibit a cooling effect due to the sweat of the wearer, and the cooling effect can be easily obtained.

Further, the overlapping portion NC where the above-described overlapping area NA and the macrocapsule application area 70f′ (existence area) overlap is an overlapping area where the abdominal cover sheet 60f and the absorbent main body 20 overlap when viewed in the thickness direction. It is also NC. In the abdominal side cover sheet 60f, microcapsules There is a non-application area 70N where there is no . If the microcapsules were applied to the entire surface of the ventral cover sheet 60f, it would be costly. can reduce the cost of

Returning to FIG. 5A, the ventral side cover sheet 60f to which the microcapsules are applied covers the ends 20ef in the longitudinal direction of the absorbent body 20 that are overlapped and joined to the skin side of the exterior body 10. It is joined to the body 10 and the absorbent body 20 . When joining the outer cover 10 and the absorbent main body 20, it is preferable to apply an adhesive such as a hot-melt adhesive over the entire non-skin side surface of the ventral cover sheet 60f. As a result, when viewed in the thickness direction, the application area coated with the hot-melt adhesive is provided in the entire area overlapping the application area 70f (existence area) of the microcapsules. The hot-melt adhesive film is provided continuously over the entire region overlapping the microcapsule application region 70f (presence region), particularly in the horizontal direction, thereby preventing the microcapsules from falling off. Moreover, the hot-melt adhesive described above may be applied to either one of the ventral cover sheet 60f and the outer body 10 (or the absorbent body 20).

Note that the application area of the hot-melt adhesive for joining the ventral cover sheet 60f is not limited to this, and at least the lower end portion of the application area 70f (existence area) of the microcapsules, that is, the application area 703 (70f) in FIG. The hot-melt adhesive may not be applied to the portion overlapping the lower end portion of the in the thickness direction. In other words, the application area to which the hot-melt adhesive is applied may be provided continuously in the left-right direction in at least the upper portion of the application area 70f (existence area) excluding the lower end when viewed in the thickness direction. . If the hot-melt adhesive application area overlaps at least the upper part of the microcapsule application area 70f when viewed in the thickness direction, the microcapsules can be prevented from falling off from the upper side in the vertical direction, and the cooling sensation effect can be maintained. can do.

Returning to FIG. 5B, the post-treatment tape 40 is provided on the surface of the outer body 10 on the non-skin side. As you can see, it has a portion 40NB that overlaps with the microcapsule application region 70b (microcapsule existing region). Since the post-treatment tape 40 makes it difficult for the microcapsules containing the cooling component to pass through, the microcapsules may pass (drop off) to the non-skin side of the back waist portion 10b in the portion overlapping the post-treatment tape 40. Suppressed. Therefore, the microcapsules are less likely to escape to the non-skin side in the thickness direction and are less likely to be released into the atmosphere, making it easier to maintain the cooling sensation effect for a long time.

In addition, when the absorbent article 1 is worn, even if a liquid-impermeable film sheet (not shown) is provided on the non-skin side of the microcapsule application areas 70 (70f, 70b) when viewed in the front-rear direction. good. Examples of film sheet materials include liquid-impermeable films mainly made of polyethylene (PE), polypropylene (PP), etc., breathable films, and composites obtained by laminating a liquid-impermeable film on one side of a non-woven fabric such as spunbond. A sheet etc. are mentioned. Hydrophobic nonwoven fabrics, water-impermeable plastic films, laminate sheets of nonwoven fabrics and water-impermeable plastic films, and the like can also be used. Such a film sheet prevents permeation of the wearer's perspiration to the non-skin side, thereby facilitating contact between the perspiration and the microcapsules. As a result, the cooling sensation effect can be improved.

In addition, the film sheet provided on the non-skin side of the position overlapping the microcapsule application area 70 (70f, 70b) when viewed in the thickness direction (front and back direction) may have a design by printing or coloring. good. By designing the position where the microcapsules having a cooling sensation component are applied, the wearer can wear the absorbent article 1 while confirming the application position, and the microcapsules can be applied. Visibility of the area 70 is improved.

<About the manufacturing method of the absorbent article 1>
Next, a method for manufacturing the absorbent article 1 will be briefly described. FIG. 9 is a schematic diagram showing a part of the production flow of the pants-type absorbent article 1 according to this embodiment. In FIG. 9, the absorbent main body 20 is supplied in a completed form for easy understanding of the present invention, and the manufacturing apparatus for the absorbent main body 20 is omitted (hereinafter, , the description of the manufacturing method of the absorbent main body 20 is also omitted). As for the exterior body 10, the skin side sheet 11, the non-skin side sheet 12, the ventral and dorsal elastic members 13a and 13b, and the ventral and dorsal leg elastic members 14a and 14b are joined together. 10 are supplied in the form of an exterior body continuum 10L formed continuously in the left-right direction (conveyance direction).

The production flow shown in FIG. 9 mainly includes a step of joining the absorbent main body 20 to the continuous body 10L of the outer packaging (first joining step S201), and a step of applying microcapsules to the continuous body of the cover sheets (60b, 60f). (Application step S202), and a step of joining a continuous body of cover sheets (60b, 60f) to the exterior body continuous body 10L (second bonding step S203). In a step further downstream of the second joining step S203, a folding step of folding the extending portion of the non-skin side sheet 12 of the exterior body 10 extending upward from the upper end of the exterior body 10 to the skin side, a waist portion (10b , 10f) in the left-right direction (10fa, 10fb, 10ba, 10bb) (so-called first joint portion 10es1 and second joint portion 10es2 forming step). The absorbent article 1 in the product state is formed by performing a dividing step or the like for dividing into product units. Steps S201 to S203 in the manufacturing flow of the absorbent article 1 will be described below. In each step, the conveying direction is the direction along the lateral direction of the absorbent article 1 .

First, in the first joining step S201, a material (here, an exterior body continuum 10L (a so-called exterior The absorbent main body 20 is placed at a predetermined position on the side of the skin of the body continuum)), and the absorbent main body 20 is joined to the exterior body continuum 10L. Note that the exterior body continuous body 10L in the first joining step S201 is the exterior body continuous body 10L before the non-skin side sheet 12 is folded back, and is the non-skin side of the upper ends of the waist members 10f and 10b shown in FIG. A portion of the seat 12 extends upward. That is, the exterior body continuous body 10L is conveyed in the conveying direction in a state in which the non-skin side sheet 12 is not folded back. Continue until sheet 12 is folded back.

In the first joining step S201, the rotating drum device 120 changes the longitudinal direction of the absorbent main body 20 received from the upstream process by 90° from the received state, so that the absorbent main body 20 is joined to the exterior body continuous body 10L. It is arranged at a predetermined position on the side of the skin. Holding pads for sucking and holding the absorbent main body 20 are provided at a plurality of positions in the rotation direction on the outer peripheral portion of the rotary drum device 120 , and each holding pad rotates along the radial direction of rotation of the rotary drum device 120 . Each of them is configured to be rotatable around the axis C120. At a receiving position Qin for receiving the absorbent main body 20, the rotary drum device 120 sucks and receives the absorbent main body 20 with each holding pad while the longitudinal direction of the absorbent main body 20 faces the conveying direction. The holding pad rotates about the rotation axis C120 by 90° until it moves to the delivery position Qout. As a result, when the holding pad delivers the absorbent main body 20 at the delivery position Qout, the width direction (horizontal direction) of the absorbent main body 20 is aligned with the conveying direction of the exterior continuous body 10L. The absorbent main body 20 is transferred at the handover position Qout to the exterior body continuous body 10L to which an adhesive or the like has been applied in advance, and the absorbent body 20 and the exterior body continuous body 10L are joined.

Subsequently, a continuous cover sheet 60L continuous in the conveying direction, which becomes a hydrophobic cover sheet (abdominal cover sheet 60f or back cover sheet 60b in this embodiment) covering at least a part of the skin side surface of the outer package 10. A step of applying water-disintegrable microcapsules containing a cooling sensation component to the side of the skin is performed (application step S202). In the application step S202, liquid microcapsules are sprayed or directly applied to a predetermined position on the skin side surface of the continuous cover sheet 60L from a cooling sensation agent application mechanism 130 provided at a predetermined position in the conveying direction, thereby forming a coating area. 70 (70a, 70b) are formed.

Next, in the second joining step S203, the continuous cover sheet 60L coated with microcapsules in the above coating step S202 so as to cover the longitudinal ends of the absorbent main body 20 joined to the outer continuous body 10L. is joined to the exterior body continuous body 10L that is transported in the transport direction. Before the continuous cover sheet 60L merges in the second joining step S203, an adhesive such as a hot-melt adhesive is applied to the skin side surface of the exterior continuous body 10L at the position where the continuous cover sheet 60L is to be arranged. Thus, the continuous cover sheet 60L and the exterior body continuous body 10L are joined.

Through these steps S201 to S203, the absorbent article 1 can be manufactured without rotating or transferring the continuous cover sheet 60L coated with microcapsules during the process. Capsules can be prevented from diffusing.

Also, a method of manufacturing the absorbent article 1 when the absorbent article 1 is not provided with a cover sheet (abdominal cover sheet 60f or back cover sheet 60b) will be briefly described. If no cover sheet is provided, the step of applying the microcapsules is performed in a separate step. Specifically, before the above-described first bonding step S201, a step of applying water-disintegrable microcapsules containing a cooling sensation component to predetermined positions on the skin side surface of the outer continuous body 10L continuous in the conveying direction. I do. Next, in the same manner as in the first joining step S201, the absorbent main body 20 rotated by 90° is placed at a predetermined position on the skin side of the outer continuous body 10L coated with the microcapsules, and the outer continuous body 10L and the absorbent main body 20 are joined. Even by such a process, the outer continuous body 10L coated with the microcapsules can be manufactured without rotating, transferring, etc. during the process, and the diffusion of the microcapsules outside the coating area where the microcapsules are coated is suppressed. can.
=== Other Embodiments ===

The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

In the above-described embodiment, microcapsules containing a cooling component are applied to the ventral side and back side cover sheets 60f and 60b of the outer package 10, but the present invention is not limited to this. FIG. 10 is a schematic plan view showing a modification of the pants-type absorbent article 1 of this embodiment. In the absorbent article 1 shown in FIG. 10, the sweat-absorbing/moisture-absorbing sheet 80 is provided along the left-right direction at the upper end of the back waist portion 10b without providing the abdominal and back cover sheets 60f and 60b. The sweat-absorbing/moisture-absorbing sheet 80 is a strip-shaped sheet having hydrophilicity, and is adhered with a hot-melt adhesive or the like, or fused with heat-sealing or the like. The sweat-absorbing and moisture-releasing sheet 80 absorbs sweat by coming into contact with the wearer's skin and releases moisture to the outside of the absorbent article 1 . In FIG. 10, the sweat-absorbing and moisture-wicking sheet 80 is provided only on the upper end of the back waist portion 10b, but it is preferably provided on the skin side of at least one of the ventral waist portion 10f and the back waist portion 10b. The sweat-absorbing and moisture-absorbing sheet 80 of FIG. 10 has a non-fixed portion 80N, which is not fixed to the back waist portion 10b, continuously in the left-right direction at the upper end portion of the sweat-absorbing and moisture-absorbing sheet 80. As shown in FIG. The non-fixed portion 80N is not limited to this, and it is preferable that the perspiration/moisture-absorbing sheet 80 has at least the upper portion thereof excluding the lower end thereof continuously in the left-right direction.

In addition, the sweat-absorbent and moisture-wicking sheet 80 is provided with an application area 70b' coated with water-disintegratable microcapsules containing a cooling component. A non-fixed portion 80N that does not fix the microcapsule-applied sweat-absorbing/moisture-absorbing sheet 80 and the dorsal waist portion 10b in the left-right direction is continuously provided at the upper end portion of the sweat-absorbing/moisture-dissipating sheet 80, thereby maintaining the moisture releasing performance. while maintaining the cooling sensation effect of the microcapsules.

In addition, in the modified example of FIG. 10, a hydrophilic sweat-absorbing and moisture-releasing sheet 80 is provided on the skin side surface of at least one of the ventral waist portion 10f and the back waist portion 10b of the outer body 10, while maintaining the moisture releasing effect. Although the cooling sensation effect is given, the form without the sweat-absorbing/moisture-absorbing sheet 80 may be adopted. In this case, moisture is less likely to be retained in the ventral waist portion 10f or the back waist portion 10b, and air permeability can be maintained, thereby improving the cooling sensation effect.

In addition, in the present embodiment described above, the abdominal and dorsal elastic members 13a and 13b are provided continuously in the left-right direction. , and a region obtained by cutting a part of the ventral elastic member 13a (or the dorsal elastic member 13b) may be provided on the outer side of the absorbent body 20 in the longitudinal direction. By cutting the ventral elastic member 13a (or the dorsal elastic member 13b), the cut area becomes an area with reduced elasticity in the left-right direction, creating a space that does not adhere to the body more than necessary and preventing perspiration and the like. Moisture tends to accumulate. By arranging the cut region of each abdominal elastic member 13a (or the dorsal elastic member 13b) and the application region of the microcapsules so as to overlap when viewed in the thickness direction, it reacts to retained sweat. By doing so, it is possible to facilitate the expression of the cooling sensation effect.

1 pants-type absorbent article, 10 outer body, 10b back waist part,
10c recessed portion, 10f ventral waist portion, 10m crotch portion,
10L exterior body continuum,
10ba one end, 10bb other end,
10fa one end, 10fb other end,
10fR both sides, 10bR both sides,
10es1 first junction, 10es2 second junction,
11 skin side sheet, 12 non-skin side sheet,
13a ventral elastic member, 13b dorsal elastic member, 13as region,
14a ventral leg elastic member, 14b dorsal leg elastic member,
20 absorbent body 20eb end, 20ef end,
21 absorber (absorbent core), 22 core wrap sheet,
23 top sheet, 24 back sheet,
25 central elastic member, 26 side seat,
26A joint portion, 26S1 fulcrum, 26f free end portion,
27 elastic member, 40 post-treatment tape, 50 three-dimensional gather,
60f ventral cover sheet, 60b dorsal cover sheet,
60L continuous cover sheet,
70 application area, 70f application area, 70b application area, 70f' application area,
70b' application area, 80 sweat-absorbent and moisture-dissipating sheet, 80N unfixed portion,
120 rotating drum device, C120 rotation shaft, 130 cooling agent application mechanism,
S201 first bonding step, S202 coating step, S203 second bonding step,
701 overlapping portion, 702, 703 overlapping area,
BH waist opening, CL center position,
NA overlap region, NB overlap region, NC overlap region, overlap region,
NN non-overlapping part, LH leg opening,
T1 end position, T2 end position, Qin receiving position, Qout delivery position

Claims (19)

having a vertical direction, a horizontal direction, and a front-back direction that intersect each other;
a liquid-absorbing absorbent body;
an exterior body provided to cover the non-skin side of the absorbent main body;
A pants-type absorbent article having
The outer body is joined at one end in the longitudinal direction of the absorbent main body, and is joined to the abdominal waist portion positioned on the abdomen side of the wearer when worn, and the other longitudinal end of the absorbent main body. a dorsal girth positioned on the dorsal side of the wearer when worn;
one end portion of the ventral waist portion in the left-right direction and one end portion of the dorsal waist portion in the left-right direction are joined by the first joint portion along the vertical direction;
The other lateral end of the ventral waist portion and the other lateral end of the dorsal waist portion are joined by a second joint portion along the vertical direction,
In the vertical direction, an existence region in which water-disintegrable microcapsules containing a cooling sensation component are present is provided above the lower ends of the first joint and the second joint, and the first joint and Below the lower end of the second joint is a non-existing area where the microcapsules do not exist,
The exterior body has a skin-side sheet and a non-skin-side sheet arranged on the non-skin side of the skin-side sheet,
Having a hydrophobic cover sheet arranged on the skin side of the skin side sheet so as to straddle the longitudinal end of the absorbent body,
The cover sheet is provided with the microcapsules,
Thread rubber that can expand and contract in the left and right direction is arranged in the vertical direction,
The thread rubber is provided between the skin-side sheet and the non-skin-side sheet,
A plurality of the rubber threads are provided between the upper end of the cover sheet and the upper end of the pants-type absorbent article in the vertical direction,
The outer body does not have a hydrophilic sweat-absorbing and moisture-releasing sheet provided on the skin side surface of at least one of the ventral waist portion and the back waist waist portion of the outer body.
A pants-type absorbent article characterized by: The pants-type absorbent article according to claim 1 ,
An underpants-type absorbent article, wherein an application area coated with a hot-melt adhesive is provided in an entire area overlapping with the existence area when viewed in the front-rear direction. The pants-type absorbent article according to claim 1 ,
When viewed in the front-rear direction, an application area coated with a hot-melt adhesive is continuously provided in the left-right direction in an upper part of the presence area excluding at least a lower end part. sexual goods. The pants-type absorbent article according to any one of claims 1 to 3 ,
The exterior body is formed of a nonwoven fabric having at least a meltblown layer,
The underpants-type absorbent article, wherein the microcapsules are applied on the skin side of the meltblown layer of the nonwoven fabric when viewed in the front-rear direction. The pants-type absorbent article according to any one of claims 1 to 4,
A pants-type absorbent article characterized by having a portion where the rubber thread and the existence region overlap when viewed in the front-rear direction. The pants-type absorbent article according to any one of claims 1 to 4 ,
A pants-type absorbent article, wherein the area between the rubber threads adjacent in the vertical direction and the existence area have an overlapping area when viewed in the front-rear direction. The pants-type absorbent article according to any one of claims 1 to 4 ,
A pants-type absorbent article, wherein the existing region has a portion arranged to straddle the rubber thread in the vertical direction when viewed in the front-rear direction. The pants-type absorbent article according to any one of claims 1 , 4, and 7,
The area between the rubber threads adjacent in the vertical direction and the existing area have an overlapping area when viewed in the front-rear direction,
A pants-type absorbent article, wherein the skin-side sheet and the non-skin-side sheet are not joined in a region between the rubber threads that are adjacent to each other in the vertical direction. The pants-type absorbent article according to any one of claims 1 to 8 ,
A pants-type absorbent article, wherein the microcapsules are not applied to the first joint portion and the second joint portion. The pants-type absorbent article according to any one of claims 1 to 9 ,
When viewed in the front-rear direction,
A pants-type absorbent article, wherein an overlapping region where the abdominal waistline portion or the back waistline portion and the absorbent main body overlap each other has a portion overlapping with the existence region. The pants-type absorbent article according to any one of claims 1 to 10 ,
A pants-type absorbent article , wherein the abdominal waist portion is provided with an abdominal cover sheet as the cover sheet . The pants-type absorbent article according to any one of claims 1 to 10 ,
A back cover sheet as the cover sheet is provided on the back waist portion.
A pants-type absorbent article characterized by: The pants-type absorbent article according to any one of claims 1 to 10 ,
When viewed in the front-rear direction, an overlapping region of the cover sheet where the cover sheet and the absorbent body overlap is provided with a coating region in which the microcapsules are coated on the cover sheet,
The underpants type absorbent characterized in that, when viewed in the front-rear direction, a non-overlapping region of the cover sheet where the cover sheet and the absorbent body do not overlap has a non-application region where the microcapsules do not exist. sexual goods. The pants-type absorbent article according to any one of claims 1 to 13 ,
The ventral waist portion has a plurality of ventral thread rubbers that can be stretched in the left-right direction,
The dorsal waist portion has a plurality of dorsal thread rubbers that can expand and contract in the left-right direction,
A terminal position of a belly-side rubber thread among the plurality of belly-side rubber threads and a terminal position of a dorsal-side rubber thread of the plurality of dorsal-side rubber threads are different in the vertical direction. A pants-type absorbent article characterized by: The pants-type absorbent article according to any one of claims 1 to 14 ,
The rubber thread has a first region having a first internal stress and a second region having a second internal stress greater than the first internal stress in the left-right direction. type absorbent article. The pants-type absorbent article according to any one of claims 1 to 15 ,
The underpants-type absorbent article, wherein the microcapsules are applied to the skin-side surface of a sheet contactable with the wearer's skin. The pants-type absorbent article according to any one of claims 1 to 15 ,
The underpants-type absorbent article, wherein the microcapsules are applied to the non-skin side of the sheet contactable with the wearer's skin. The pants-type absorbent article according to any one of claims 1 to 17 ,
A post-treatment tape is provided on the surface of the exterior body on the non-skin side,
The underpants-type absorbent article, wherein the post-treatment tape has a portion that overlaps with the presence area when viewed in the front-rear direction. The pants-type absorbent article according to any one of claims 1 to 18 ,
A pants-type absorbent article, wherein a film sheet is provided on the non-skin side of the presence area when viewed in the front-rear direction.

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