TW202206042A - Underpants-type absorbent article - Google Patents

Abstract

An underpants-type absorbent article (1) has an absorbent body (10) and a waist member (20) overlying the non-skin side of the absorbent body (10), and has a pair of separation parts (25) that separate the waist member (20) into a front body (20f) and a back body (20b). At both side parts in the left-right direction of one of the front body (20f) and the back body (20b), at least one pair of attachment parts (32) are provided each of which is removably attached to a predetermined region of the other of the front body (20f) and the back body (20b). The other of the front body (20f) and the back body (20b) has, at a position corresponding to the center in the up-down direction of the attachment parts (32), an expansion/contraction region (20EA) that can expand and contract in the left-right direction.

Description

Shorts-type absorbent article

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

Conventionally, there is known an absorbent article such as a disposable diaper that can be used as a tape type (expanded type) by cutting off a part of the waist member formed as a pant type (pants type). For example, Patent Document 1 discloses a pant-type paper diaper which can be opened to the left and right by providing a pair of tear guide lines on the ventral portion of the exterior body, and cutting the exterior body along the tear guide lines. This shorts-type disposable diaper is a dual-use disposable disposable diaper that can be used as a tape-type disposable diaper by using a hook and loop fastener that is pulled out after opening. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2010-131197

[Problems to be Solved by Invention]

In a dual-use disposable diaper such as Patent Document 1, when a part of the outer body is cut from a shorts-type state and used as a tape-type state, there is a concern that the fit is deteriorated. For example, when used as a shorts type diaper, even if it has good fit at the waist, when used as a tape type paper diaper, the fit at the waist is not enough compared with that of the shorts type, and the position of the diaper may be biased. Displacement or drainage leakage concerns.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to realize good fit as an underpants-type absorbent article that can be used as an adhesive tape type. [Technical means to solve problems]

The main invention for achieving the above object is a pant-type absorbent article having vertical, horizontal, and front-rear directions intersecting with each other, and having an absorbent body and a non-skin side of the absorptive body arranged to overlap with each other. A waistline member, the pants-type absorbent article, characterized by having a separation portion for separating the waistline member into a pair for a front body cloth and a back body cloth, and on the left and right sides of one of the front body cloth and the back body cloth At least one pair of latching portions in which both side portions in the direction are detachably engaged in predetermined regions of the other of the front and rear fabrics are provided, and the other of the front and rear fabrics is The center position of the said latching part in the said vertical direction has the expansion-contraction area|region which can expand and contract along the said left-right direction. Other features of the present invention will be apparent from the description of this specification and the accompanying drawings. [Effect of invention]

According to the present invention, good fit can be realized in the pants-type absorbent article that can be used as an adhesive tape type.

From the description of this specification and the attached drawings, at least the following matters can be understood.

A pant-type absorbent article having an up-down direction, a left-right direction, and a front-rear direction that intersect with each other, an absorbent main body, and a waist member arranged to overlap with a non-skin side of the absorbent main body, the shorts-type absorbent article. The article is characterized in that it has a separation part for separating the waist member into a pair for the front body cloth and the back body cloth, and is detachable on both sides in the left-right direction of one of the front body cloth and the back body cloth At least one pair of locking portions to be locked in a predetermined region of the other of the front body cloth and the rear body cloth is provided, and the locking portions of the other one of the front body cloth and the rear body cloth in the vertical direction are provided. The central position of the device has a retractable area along the aforementioned left-right direction.

According to such an underpants-type absorbent article, in the waistline member (front cloth) to which the pair of locking portions is locked, the contraction force in the left-right direction acts on the region between the locking portions. That is, in the waist opening in which the front body cloth and the back body cloth are annularly connected by a pair of locking portions, the waist opening is easily contracted by orienting the locking portions inward in the left-right direction. Thereby, even when the absorbent article is used in any form of a pants type or an adhesive tape type, good fit can be achieved.

In such an underpants-type absorbent article, it is desirable that the absorptive main body has an absorber elastic member that expands and contracts along the longitudinal direction of the absorptive main body.

According to such an underpants-type absorbent article, when wearing, the absorber elastic member contracts and lifts the absorptive main body toward the skin side to be worn, so that the fit and absorbency in the lower crotch can be improved. That is, it is possible to improve the fit of the absorbent body in the lower crotch of the wearer while improving the fit of the waist member in the waist of the wearer. Thereby, the adhesiveness as the whole of an absorbent article can be improved.

In such an underpants-type absorbent article, a plurality of the absorber elastic members are provided at predetermined intervals in the left-right direction, and the width ratio of the expansion-contraction region in the left-right direction is arranged on the farthest side in the left-right direction. It is desirable that the space|interval in the said absorber elastic member and the said absorber elastic member arrange|positioned at the other most side in the said left-right direction is larger in the said left-right direction.

According to such an underpants-type absorbent article, in the left-right direction, the range of the shrinkage force acting on the front fabric by the stretchable region is wider than the range of the contractile force acting on the absorbent body by the absorber elastic member. Therefore, the contraction force due to the expansion-contraction region easily resists the pulling force due to the absorber elastic member, and even if the absorptive body is pulled downward by the contraction force of the absorber elastic member, the front cloth is not easily pulled down. Thereby, favorable adhesiveness can be maintained easily.

In such an underpants-type absorbent article, the absorptive main body has an absorptive core containing a superabsorbent polymer, and the width in the left-right direction of the expansion-contraction region is larger than the width in the left-right direction of the absorptive core. for expectations.

According to such an underpants-type absorbent article, in the left-right direction, the range in which the contraction force acts by the expansion-contraction region is wider than the width of the absorptive core. Therefore, even if the absorptive force is reduced by the contraction force of the absorber elastic member When the core is pulled down, it is not easy to pull down the front cloth. Thereby, it becomes easier to maintain favorable adhesiveness.

In such an underpants-type absorbent article, it is desirable that the width in the left-right direction of the expansion-contraction region be larger than the width in the left-right direction of the absorptive main body.

According to such an underpants-type absorbent article, in the left-right direction, the range in which the contraction force acts by the expansion-contraction region is wider than the width of the absorptive main body. Therefore, even if the absorptive force is reduced by the contraction force of the absorber elastic member The main body is pulled downward, and it is not easy to pull down the front cloth. Thereby, it becomes easier to maintain favorable adhesiveness.

In such an underpants-type absorbent article, it is desirable that the upper end of the front side of the absorber elastic member is positioned lower than the lower end of the stretchable region in the vertical direction.

According to such an underpants-type absorbent article, since the region where the contraction force by the absorbent elastic member acts and the expansion and contraction region do not overlap each other, the contraction force due to the absorber elastic member does not act easily with respect to the expansion and contraction region. The front cloth is not easily flexed, etc. Therefore, when the operation of locking the locking portion to the front cloth is performed, the surface of the front cloth is easily kept flat, and the locking portion can be easily locked firmly. As a result, the fit in the waistline can be improved.

In such an underpants-type absorbent article, it is desirable that the upper end of the front side of the absorptive elastic member is positioned lower than the lower end of the separation portion in the vertical direction.

According to such an underpants-type absorbent article, since the region where the contraction force by the absorber elastic member acts and the region between the pair of separation parts do not overlap with each other, the absorber is less than the region between the pair of separation parts. The contraction force due to the elastic member does not act easily, and it is difficult to generate deflection or the like in the area of the front cloth between the separation parts. Therefore, with respect to the pants-shaped absorbent article, the operation of separating the separating portion can be easily performed.

In such an underpants-type absorbent article, a pair of side joining portions for joining the front body cloth and the back body cloth to each other are provided at both end portions in the left-right direction, and the locking portion is locked to the waist member. In this state, it is desirable that the locking portion is located on the outer side in the left-right direction than the absorber elastic member, and is located on the inner side in the left-right direction than the side joint portion.

According to such an underpants-type absorbent article, it is outside the absorptive elastic member in the left-right direction, and the region inside the side joint is less susceptible to the contraction force by the absorber elastic member. Therefore, since the locking portion is locked in this region, the locking operation of the locking portion can be performed more stably and easily. Thereby, the fit of the waist member can be further improved at the waist of the wearer.

In such an underpants-type absorbent article, it is desirable to have the expansion-contraction region in the vertical direction, and a portion overlapping with both ends in the left-right direction of the absorptive main body.

According to such an underpants-type absorbent article, it becomes easy to pull the edge part of the left-right direction of an absorptive main body to the outer side of the left-right direction by an expansion-contraction area|region. That is, the force that expands the absorbent body acts to easily suppress excretion leakage, and at the same time, it is possible to make the absorbent body less likely to float from the wearer's body. Therefore, the fit of the absorbent body at the time of wearing of the absorbent article can be improved.

In such a pant-type absorbent article, when viewed in the thickness direction in the unfolded and extended state, the contraction force in the left-right direction of the expansion-contraction region in the portion where the expansion-contraction region and the absorbent body overlap is higher than that of the expansion-contraction region and the absorbent body. It is desirable that the contraction force in the left-right direction of the expansion-contraction region in the portion where the sexual bodies do not overlap is smaller.

According to such an underpants-type absorbent article, since excessive shrinkage force does not easily act on the portion overlapping with the absorbent body in the thickness direction, it is possible to suppress the undulation of the absorbent body and the like. Thereby, the absorptive main body can be easily adhered to the skin of the wearer, and the fit can be easily maintained over the entire waistline.

In such an underpants-type absorbent article, it is desirable to have a low-stretch region having a lower stretchability than the stretch region, and the low-stretch region is preferably arranged outside of the stretch region in the left-right direction.

According to such a pants-type absorbent article, since the waist member is provided with the region of the low-stretch region outside the stretchable region, wrinkles are less likely to be formed on the surface of the waist member, so that the shape retention of the sheet member constituting the waist member can be easily ensured. sex. Therefore, the operation of peeling off the locking portion locked at the periphery of the low expansion-contraction region from the waist member can be performed smoothly.

In such an underpants-type absorbent article, it is desirable that at least a part of the low-stretch region is positioned outside the stretchable region in the left-right direction, and is disposed at a position overlapping the stretchable region in the vertical direction.

According to such an underpants-type absorbent article, since the low-stretch regions are provided on both sides of the stretch-and-stretch regions, the operation of peeling off the locking portions locked in the regions overlapping with the low-stretch regions from the waist member can be performed more smoothly .

In such an underpants-type absorbent article, it is desirable that the width in the left-right direction of the stretchable region is larger than the width of the low-stretch region in the left-right direction.

According to such an underpants-type absorbent article, the width in the left-right direction of the stretchable region is wider than the width in the left-right direction of the low-stretch region, and it becomes easy to impart sufficient stretchability to the waist member. Therefore, in the left-right direction, the waistline member is easily contracted in the region between the locking portions of the pair of locking portions, and the fit in the waistline of the wearer can be further improved.

In such an underpants-type absorbent article, it is desirable that the entirety of the locking portion and the expansion-contraction region overlap in the vertical direction.

According to such an underpants-type absorbent article, since the contraction force by the expansion-contraction region acts on the entire vertical direction of the locking portion, the waist member can be easily pulled inward in the left-right direction via the locking portion, and the waist opening can be increased. of fit.

In such an underpants-type absorbent article, the absorptive main body has an absorptive core containing a superabsorbent polymer, and the lower end of the locking portion is positioned above the upper end of the absorptive core in the vertical direction. expect.

According to such an underpants-type absorbent article, since the highly rigid absorptive core and the locking portion do not overlap in the vertical direction, in the region between the pair of locking portions, it is possible to prevent the absorptive core from interfering with the expansion-contraction region. telescopic situation. Therefore, good fit of the waist member can be easily maintained.

Such an underpants-type absorbent article includes a tongue piece provided with the locking portion, and a tongue piece joining portion for joining the tongue piece to the waist member on the outer side of the locking portion in the left-right direction. It is desirable to provide a hook member or a loop member of a flat fastener in the aforementioned locking portion.

According to such an underpants-type absorbent article, the user can grasp the tongue piece, and can easily perform the operation of locking or removing the locking portion to the waist member. In addition, a hook member or a ring member for locking is provided in the locking portion, and it is possible to repeatedly attach and detach to the surface of the waist member. Therefore, the adjustment of the locking position when the locking portion is locked, etc. can be easily performed.

In such an underpants-type absorbent article, a pair of side joint portions for joining the front body cloth and the rear body cloth to each other are provided at both end portions in the left-right direction, and the tongue piece joint portions are provided in the left-right direction. It is desirable to arrange the said separation part between the said tongue piece engaging part and the said locking part in any position from the outer side edge of the said absorptive main body to the said side joint part.

According to such an underpants-type absorbent article, when the user performs the operation of separating the separating portion, the user can hold the tongue piece with one hand and the waist member with the other hand, and pull in the opposite direction to separate the separating portion. The parts are easily separated. Thereby, the action of removing the absorbent article from the wearer's body or transforming the shorts type into the tape type can be easily performed.

In such an underpants-type absorbent article, it is desirable that the back piece has a leg-hole elastic member that can expand and contract in the left-right direction along the lower edge portion of the back piece.

According to such an underpants-type absorbent article, stretchability is imparted along the leg openings of the absorbent article, so that the leg openings can be easily fitted to the wearer's leg openings. In particular, in the back cloth, the leg openings are raised from the buttocks due to the influence of the wearer's buttocks or the like, or positional displacement is likely to occur. Therefore, the leg circumference of the back cloth can be increased by providing the leg circumference elastic member. The fit is not easy to cause discomfort to the wearer.

In such a pants-type absorbent article, the absorptive main body has an absorber elastic member that expands and contracts along the longitudinal direction of the absorptive main body, and the stress in the left-right direction of the expansion-contraction region is higher than that of the absorber elastic member in which the absorber elastic member is arranged. It is desirable that the stress in the aforementioned up-down direction of the region be greater.

According to such an underpants-type absorbent article, the stress of the expansion-contraction region is larger than the stress of the absorber elastic member, and the waist member resists the force that pulls down the upper end of the absorptive main body by the absorber elastic member. The position deviation is not easy to produce. Thereby, the fit of the waistline member in the waistline of the wearer can be easily maintained.

In such an underpants-type absorbent article, the other one of the front body cloth and the back body cloth is between the upper end and the lower end of the locking portion in the up-down direction, and is a pair of the cards in the left-right direction. It is desirable that the entire inner ends of the stopper have the aforementioned expansion and contraction regions.

According to such an underpants-type absorbent article, the entire rectangular region sandwiched by the pair of left and right locking portions shrinks in the left and right direction, and the left and right end portions of the back fabric are easily further separated through the pair of locking portions. Pull inward. As a result, the waist opening is shrunk to make it easier to fit along the wearer's waist, and positional deviation is less likely to occur.

In such an underpants-type absorbent article, the absorptive main body has an absorber elastic member that expands and contracts along the longitudinal direction of the absorptive main body, and the absorber elastic member is located on the rear side from a center position in the longitudinal direction. It is desirable that the length of the aforementioned absorbent elastic member is longer than that of the aforementioned absorbent elastic member in the front side of the aforementioned central position.

According to such an underpants-type absorbent article, the contraction force by the absorbent elastic member acts on the buttocks side of the wearer, and the absorbent body is easily tightly fitted to the grooves of the buttocks. Thereby, the fit of the underpants-type absorbent material is further improved, and leakage of excretory fluid such as menstrual blood can be suppressed.

In such an underpants-type absorbent article, the back piece has a tongue piece, the engaging portion is provided, and the upper end of the rear side of the absorbent elastic member is located more than the lower end of the tongue piece in the up-down direction. The upper side is the expectation.

According to such an underpants-type absorbent article, when the wearer pulls the tongue piece in the left-right direction to engage the front waistline member, the rear side upper end of the absorber elastic member is pulled in the left-right direction. The rear area of the absorbent body is not easily slipped downward, and the absorbent body is more easily fitted to the groove of the wearer's buttocks by the contraction force of the elastic member of the absorbent body.

Such an underpants-type absorbent article has a front leg elastic member along an edge portion of a lower side in the vertical direction of the front body cloth, and a lower side in the vertical direction along the back body cloth. It is desirable that the length in the left-right direction of the front leg hole elastic member is shorter than the length in the left-right direction of the rear leg hole elastic member.

According to such an underpants-type absorbent article, the region where the contraction force by the front leg elastic member does not act is provided at the both ends of the front waist member in the left-right direction, so that it is difficult to shrink. Thereby, since the grab part is formed in the edge part of the left-right direction of the front side waist member, the operation|movement which latches the tongue piece provided in the rear side waist member can be performed easily. Therefore, the wearing operation of the shorts-type absorbent article becomes easy, and it can be easily fitted to the body.

In such an underpants-type absorbent article, it is desirable that the upper end of the front leg hole elastic member is positioned lower than the lower end of the locking portion in the vertical direction.

According to such an underpants-type absorbent article, the contraction force by the front waist member and the front leg elastic member does not easily act on the region where the locking portion is locked, and the operation of locking the tongue can be performed more easily. Moreover, since the stretchability of the front-side leg circumference elastic member is not easily interfered by the locking portion, the front-side waist circumference member can easily fit the leg circumference opening to the wearer's groin.

In such a pants-type absorbent article, it is desirable to provide a functional material containing at least any one of a cooling agent, a warming agent, and a fragrance in at least any predetermined region of the absorptive main body and the waist member.

According to such an underpants-type absorbent article, a cooling effect, a warming effect, and the like can be imparted to the wearer.

===First Embodiment === An example of the underpants-type (pants-type) absorbent article according to the first embodiment of the present invention will be described with respect to underpants-type sanitary napkin 1 (hereinafter also simply referred to as "sanitary napkin 1"). In addition, the pants-type absorbent article also includes a pants-type paper diaper, a pants-type absorbent pad, and the like.

<Basic structure of sanitary napkin 1> FIG. 1 is a schematic perspective view of the sanitary napkin 1 of the first embodiment. 2 : is the top view which looked at the sanitary napkin 1 in the unfolded and extended state from the skin side in the thickness direction. FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 .

In addition, the "extended state" of the sanitary napkin 1 means that each elastic member (for example, the absorber elastic member 50, the skin-side sheets 22, 23, etc.) included in the sanitary napkin 1 is extended, and the entire sanitary napkin 1 ( The whole product) is stretched to a state without wrinkles, and specifically, it means to stretch the dimensions of each member constituting the sanitary napkin 1 (for example, the non-skin-side sheet 21 and the skin-side sheets 22, 23, etc., which will be described later) to the size of the member alone. The size is the same as or close to this size.

The sanitary napkin 1 has "up-down direction", "left-right direction" and "front-rear direction" which are orthogonal to each other as shown in FIG. 1 . Moreover, as shown in FIG. 3, it has the thickness direction which is the direction in which each member is laminated|stacked. In the vertical direction, when the wearer wears the sanitary napkin 1, the side that becomes the waist of the wearer is referred to as the "upper side", and the side that becomes the crotch of the wearer is referred to as the "lower side". In addition, in the front-rear direction, the side that becomes the belly of the wearer at the time of wearing is referred to as the "front side", and the side that becomes the back side of the wearer is referred to as the "rear side". In addition, in the state where the wearer wears the sanitary napkin 1 in the thickness direction, the side in contact with the wearer's skin is referred to as the "skin side", and the opposite side is referred to as the "non-skin side".

Moreover, the sanitary napkin 1 has a "vertical direction" and a "horizontal direction" which are orthogonal to each other in the unfolded state shown in FIG. 2 . "Vertical direction" is the direction along the vertical direction in the shorts type, and "horizontal direction" is the direction along the left-right direction in the shorts type.

The sanitary napkin 1 of the present embodiment includes a liquid-absorbing absorbent body 10 that absorbs excretion fluid such as menstrual blood, and a waist member 20 that is disposed so as to be overlapped with the non-skin side of the absorbent body 10 and is placed on the sanitary napkin. 1 is arranged on the waist of the wearer when wearing it;

(absorbent body 10) As shown in FIG. 2 , the absorbent body 10 has a longitudinal direction (corresponding to the “long direction” of the absorbent body 10 in an extended state), which is a substantially rectangular shape in plan view along the up-down direction of the sanitary napkin 1 . Moreover, as shown in FIG. 3, the absorptive main body 10 has the absorptive core 11 along the longitudinal direction (vertical direction), the top sheet 12 arranged on the skin side rather than the absorptive core 11, and the The absorptive core 11 is closer to the back sheet 13 on the non-skin side. However, the absorptive main body 10 may be provided with other sheet members. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorptive core 11 in the thickness direction. Moreover, the absorber elastic member 50 mentioned later is provided between the absorptive core 11 and the back sheet 13.

The absorptive core 11 is a member that absorbs and retains liquid such as menstrual blood, and is formed of, for example, liquid-absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP). In addition, the outer peripheral surface of the absorptive core 11 may be covered with a liquid-permeable sheet member (core clad sheet) such as tissue paper and nonwoven fabric.

The top sheet 12 is a liquid-permeable sheet-permeable member that can come into contact with the wearer's skin during wearing, and is formed of, for example, a hydrophilic hot air nonwoven fabric, spunbond nonwoven fabric, or the like.

The back sheet 13 is composed of a liquid-impermeable sheet 13a for suppressing leakage of liquid such as menstrual blood absorbed by the absorptive core 11 to the outside, and a water-repellent sheet 13a arranged on the non-skin side of the liquid-impermeable sheet 13a. The two-layer structure of the sheet 13b is formed. As the liquid-impermeable sheet 13a, for example, a resin film or the like can be used, and as the hydrophobic sheet 13b, for example, a flexible nonwoven fabric or the like can be used. However, the hydrophobic sheet 13b need not necessarily be provided, and the back sheet 13 may be constituted only by the liquid-impermeable sheet 13a.

Moreover, the leak-proof wall part which is not shown in figure may be provided in the both sides of the left-right direction of the absorptive main body 10. The leak-proof wall portion is a portion corresponding to a so-called three-dimensional hemming, and the leak-proof wall portion stands up from both sides in the left-right direction of the absorbent body 10 toward the wearer's skin when the sanitary napkin 1 is worn. , which prevents excretions such as menstrual blood from leaking to the outside of the absorbent body 10 .

As shown in FIGS. 2 and 3 , the absorbent body 10 of the present embodiment is provided with a plurality of absorber elastic members 50 that expand and contract along the longitudinal direction (vertical direction). The absorptive elastic member 50 is made of, for example, thread rubber, and is arranged in the longitudinal direction (up and down) in an elongated state on the non-skin side (between the back sheet 13 and the absorptive core 11 in FIG. 3 ) rather than the absorptive core 11 . direction). In the sanitary napkin 1 of the present embodiment, five absorber elastic members 50 (see FIG. 2 ) are provided at predetermined intervals in the left-right direction. The expansion ratio of the absorber elastic member 50 is preferably about 1.4 to 3.3 times. In addition, the elongation ratio is represented by the value obtained by dividing the length of the elastic member in the extended state by the length of the elastic member in the natural state. The elongation ratio of the absorbent elastic member 50 is set to a certain strong ratio, and the relatively rigid absorbent body 10 is shrunk from the non-skin side in the thickness direction, so that when the sanitary napkin 1 is worn, the absorbent body can be 10 and the wearer's body can be easily fitted. That is, the absorptive main body 10 is raised toward the wearer's skin side by the stretchability of the absorber elastic member 50, so that the absorptive main body 10 can be easily brought into close contact with the lower part of the wearer's crotch, and menstrual blood and the like can be prevented. The excretory fluid is not easy to leak.

(waist member 20) The waistline member 20 is an exterior body composed of a plurality of sheet members, and includes at least a non-skin-side sheet 21 and skin-side sheets 22 and 23 (see FIG. 3 ). In addition, in the following description, in the longitudinal direction of the waist member 20, a portion further to the front side (abdominal side) than the center position CL is also referred to as a front side waist member 20f, and also to the rear side (back side) from the center position CL. side) is referred to as the rear waistline member 20b. The front waistline member 20f is a portion that comes into contact with the abdomen of the wearer's body when the sanitary napkin 1 is worn, and corresponds to the "front cloth" of the sanitary napkin 1 . The rear waistline member 20b is a portion that comes into contact with the back side of the wearer's body when the sanitary napkin 1 is worn, and corresponds to the "back cloth" of the sanitary napkin 1 .

The non-skin side sheet 21 is a non-stretchable sheet member arranged on the most non-skin side of the sanitary napkin 1, and is formed of, for example, a spunbond nonwoven fabric, an SMS nonwoven fabric, or the like. In the present embodiment, the non-skin-side sheet 21 has a narrowed shape toward the inner side in the left-right direction in the longitudinal center portion (the portion including the center position CL) as shown in the plan view of FIG. 2 .

The skin-side sheet 22 has a stretchable sheet member laminated on the skin side of the non-skin-side sheet 21 on the front side (abdominal side) in the vertical direction. The skin-side sheet 22 is formed of, for example, a stretchable nonwoven fabric. The "stretchable nonwoven fabric" is a nonwoven fabric that includes stretchable fibers having stretchability and extensible fibers with lower shrinkage than the stretchable fibers, and has been subjected to appropriate stretching treatment such as gear rolling. In the skin-side sheet 22 of the present embodiment, a fiber of a polyurethane-based elastomer, which is a type of elastic thermoplastic elastomer, can be used as the stretchable fiber, and a polymer of a polyolefin-based resin, which is a type of inelastic thermoplastic resin, can be used. Fibers of propylene (PP) are used as elongation fibers.

The skin-side sheet 22 is joined to the non-skin-side sheet 21 by a plurality of interspersed sheet joining portions (not shown), thereby imparting stretchability to at least the left-right direction to the front waist member 20f. In the present embodiment, the sheet joining portion is formed using a well-known joining means such as ultrasonic welding.

The skin-side sheet 23 has a stretchable sheet member laminated on the skin side of the non-skin-side sheet 21 on the rear side (back side) in the vertical direction. The skin-side sheet 23 has the same structure as the skin-side sheet 22 . That is, the skin-side sheet 23 is formed of a stretchable nonwoven fabric, and is joined to the non-skin-side sheet 21 by a plurality of sheet joining parts (not shown) scattered. Thereby, at least the stretchability in the left-right direction is imparted to the rear waist member 20b.

In addition, other sheet members other than the non-skin-side sheet 21 and the skin-side sheets 22 and 23 may be provided as sheet members constituting the waist member 20 . For example, the waist member 20 may have a non-stretchable nonwoven fabric disposed on the skin side of the stretchable skin-side sheets 22 and 23, or may have a three-layer structure in which the stretchable nonwoven fabric is sandwiched by the non-stretchable nonwoven fabric.

The sanitary napkin 1 is, from the unfolded state shown in FIG. 2, the center position CL in the longitudinal direction (indicated by a one-dot chain line in FIG. 2) as a folded position, and the skin side and rear of the front waist member 20f (front cloth) The side waist member 20b (back cloth) is folded in half in the vertical direction (front-back direction) so that the skin side faces face each other. In this folded state, the lateral (left-right direction) both ends 40f and 40f of the front waistline member 20f and the laterally (left-right) both ends 40b and 40b of the rear waistline member 20b, which are stacked in the front-rear direction, are welded by closed welding. The side engaging portion 40 is formed by a well-known engaging means such as the like. Thereby, the waist member 20 ( 20f and 20b ) folded in half is connected in a ring shape on the front side (abdominal side) and the rear side (back side) to form one waist opening 1a and a pair of legs as shown in FIG. 1 . The opening 1b is surrounded to form a pant-type sanitary napkin 1 .

(Tongue 30) A pair of tongue pieces 30 are provided on both sides in the left-right direction of the sanitary napkin 1 . The tongue piece 30 has a base sheet 31 and a locking portion 32 .

The base sheet 31 is a sheet member formed of non-woven fabric or the like, and is joined to the waist member 20 on one side in the left-right direction by a tongue joint portion 35, and a locking portion 32 is provided on the other side in the left-right direction (see FIG. 2 ). ). In the present embodiment, the side engaging portion 40 of the above-described waist member 20 is configured to also serve as the tongue engaging portion 35 . That is, the front side waist member 20f, the rear side waist member 20b, and the tongue piece 30 are integrally joined by the side joint portion 40. As shown in FIG. However, the tongue engaging portion 35 and the side engaging portion 40 may be provided as different bodies. For example, the tongue piece 30 may be joined to a predetermined area other than the side joint part 40 by the tongue piece joint part 35 in the front waist member 20f or the rear waist member 20b. Moreover, the tongue piece joint part 35 and the side joint part 40 may be formed by ultrasonic welding etc. similarly, and may be formed using adhesives, such as a hot melt adhesive.

The locking portion 32 is a locking member for locking the tongue piece 30 with respect to the waist member 20 so that the tongue piece 30 can be attached and detached, and is provided in a predetermined area of the skin side of the tongue piece 30 (the opposite side to the tongue piece engaging portion 35 in the left-right direction). Area). In the present embodiment, the locking portion 32 is formed of, for example, polypropylene or the like, and is a flat fastener provided with a plurality of locking hook members (not shown locking protrusions) on the skin-side surface. These locking projections are hooked to the fibers (loops) of the nonwoven fabric constituting the non-skin side sheet 21 provided on the outermost part of the waist member 20, and the locking portion 32 (the tongue piece 30) is detachably attached to the nonwoven fabric. The non-skin side of the waist member 20 . However, a hook member for fastening is provided on the waist member 20 side, and the hook member is hooked to a ring member for the locking portion 32 side.

As shown in FIG. 1 , in the sanitary napkin 1 in the underpants-type state, the locking portion 32 of the tongue piece 30 is locked to the front waistline at the inner region of the tongue piece joint portion 35 (side joint portion 40 ) in the left-right direction. Member 20f.

＜About how to put on and take off the sanitary napkin 1＞ Next, the operation of putting on and taking off the sanitary napkin 1 will be described. The sanitary napkin 1 is of a pant type (underpants type) as shown in FIG. 1 in an initial state, and can be worn as a general pant-type absorbent article. Then, when the sanitary napkin 1 is removed from the body, the waist member 20 formed in an annular shape along the waist of the wearer is separated into a front waist member 20f and a rear waist member 20b, and the sanitary napkin 1 can be removed by unfolding.

4A and 4B are diagrams for explaining the operation of separating the waist member 20 of the sanitary napkin 1 into the front waist member 20f and the rear waist member 20b. FIG. 4A is a schematic cross-sectional view showing a state of the sanitary napkin 1 in a shorts-type state viewed from the upper side in the vertical direction (the side of the waist opening 1a), and FIG. 4B is a schematic view of the front waistline member 20f and the rear waistline in FIG. 4A. A schematic cross-sectional view showing a state in which the member 20b is separated.

In the sanitary napkin 1 in the pant-type state, the front waist member 20f and the rear waist member 20b are joined to each other by the side joints 40 and 40 provided at both ends in the left-right direction to form an annular waist as shown in FIG. 4A . Opening 1a. Then, a pair of tongue pieces 30 are provided on both sides in the left-right direction of the waist member 20 , and the tongue pieces 30 are locked to the non-skin side surface of the front waist member 20 f by the locking portion 32 .

Moreover, in FIG. 4A, a pair of separation part 25 is provided in the both sides of the left-right direction of the front side waist member 20f. The separating portion 25 is a portion provided for separating the waistline member 20 formed in an annular shape along the waistline of the wearer into the front waistline member 20f and the rear waistline member 20b, and is provided at the side joint portion in the left-right direction. 40 to any of the regions where the locking portion 32 is locked. In FIG. 4A , the separation portion 25 is provided at a position closer to the side engagement portion 40 in the region between the side engagement portion 40 and the locking portion 32 in the left-right direction. The separation portion 25 is, for example, a piercing line (see FIG. 2 ) along the vertical direction, and by tearing the waistline member 20 along the piercing line, the waistline member 20 can be easily separated into the front waistline member 20f and the rear waistline member 20b.

Moreover, in the sanitary napkin 1, since the side joint part 40 is formed by ultrasonic welding, the rigidity of the side joint part 40 becomes high compared with other area|regions of the waist member 20. Therefore, the waistline member 20 may be torn at the inner end in the left-right direction of the side joint portion 40 having a large difference in rigidity. At this time, since the inner end of the side engaging portion 40 becomes the separation portion 25, a piercing wire or the like does not necessarily have to be provided.

Moreover, since the separation operation is easy, the separation portion 25 may be formed by previously connecting the front waistline member 20f and the rear waistline member 20b so as to be separable. For example, a part of the front waistline member 20f and the rear side waistline member 20b are laminated in the thickness direction, and the laminated part is weakly bonded, or the laminated part is connected by hooks and fasteners to form a separable waistline The member 20 may also be used. Moreover, the front waistline member 20f and the rear side waistline member 20b may be connected by a predetermined connecting member, and the waistline member 20 may be separable by removing the connecting member from the connected side.

Moreover, the part of the base sheet 31 on which the front waistline member 20f and the tongue piece 30 are laminated is weakly bonded, while maintaining the bond between the tongue piece joint part 35 (side joint part 40 ) and the base material sheet 31 , at the separation part 25 . , the front waistline member 20f and the base sheet 31 may be easily separated.

In the separation part 25, the sanitary napkin 1 which separated the waistline member 20 into the front side waistline member 20f and the rear side waistline member 20b becomes the state shown to FIG. 4B. That is, the separation portion 25 in FIG. 4A is separated into a separation end 25fe on the side of the front waist member 20f and a separation end 25be on the side of the rear waist member 20b, and the front waist member 20f and the rear waist member 20b are cut back and forth. Leave. Then, in FIG. 4B , on both sides in the left-right direction, a pair of tongue pieces 30 and 30 are joined to the rear waistline member 20b via the tongue piece joint parts 35 (side joint parts 40 ), and are provided on the tongue pieces 30 and 30 . The locking portions 32 and 32 of 30 are locked to the front waistline member 20f, respectively. Thereby, the waist member 20 is formed into a ring shape. When the sanitary napkin 1 in this state is detached from the wearer's body, it can be easily detached by peeling off the locking portion 32 from the front waist member 20f and unfolding the sanitary napkin 1 .

5 is a development plan view of the sanitary napkin 1 in a state where the front waistline member 20f and the rear waistline member 20b are separated. The separated sanitary napkin 1 can be used as a so-called adhesive type sanitary napkin provided with tongues 30 of locking portions 32 on both left and right sides of the rear waist member 20b (back cloth). That is, the sanitary napkin 1 of this embodiment can be used as a dual-purpose type of a pant type and an adhesive tape type.

Conventional pant-type sanitary napkins have good fit, and it is difficult to put on and take off in toilets or the like when going out. For example, when taking off the used sanitary napkin when going out and putting on a new one, since the toes must be inserted into the leg opening of the shorts-type sanitary napkin and pulled up to the bottom of the crotch, the wearer has to take off the sanitary napkin. In an environment where pants and shoes are difficult, there is a so-called difficulty in putting on and taking off.

On the other hand, according to the sanitary napkin 1 of the present embodiment, the waist member 20 is separated at the separation portion 25, and the sanitary napkin 1 can be easily removed. Then, by separating the waist member 20 of the new sanitary napkin 1 at the separating portion 25 in advance and making it into an unfolded state, it can be used as an adhesive type sanitary napkin. Therefore, even in an environment where it is difficult to take off pants and shoes, It can also be easily attached and detached.

Furthermore, in the sanitary napkin 1 of the present embodiment, even when used as an adhesive tape type, good fit similar to that of the underpants type can be achieved. Fig. 6 is a plan view showing a state in which the sanitary napkin 1 in the adhesive tape state is again made into a pant shape and stretched. In FIG. 6 , the sanitary napkin 1 in the unfolded and extended state shown in FIG. 5 is folded in half at the center position CL in the longitudinal direction (long direction), and a pair of locking portions 32 and 32 are locked to the front waist member 20f (front body cloth). ) is shown in the state of shorts.

In the sanitary napkin 1, the front waist member 20f can be stretched and contracted in the left-right direction by the elasticity of the skin-side sheet 22 having elasticity in the left-right direction. Therefore, when the pair of locking portions 32, 32 is locked to the front waist member 20f (front body cloth) as shown in FIG. 6, the region between the locking portions 32, 32 expands and contracts in the left-right direction. At least the front waistline member 20f has a stretchable region 20EA that can be expanded and contracted in the left-right direction at a center position 32C in the vertical direction of the locking portion 32 in a state where the locking portion 32 is locked (indicated by a hatched portion in FIG. 6 . ).

That is, when the front waistline member 20f (front body cloth) is engaged with the locking portions 32 and 32, the contraction force in the left-right direction acts on the region therebetween. Therefore, by pulling the left and right end portions of the rear waistline member 20b inward through the pair of locking portions 32 and 32, the annular waistline opening 1a formed by the front waistline member 20f and the front waistline member 20f is easily contracted. That is, such a contraction force indicated by the arrow mark in FIG. 4B acts on the front waistline member 20f, and contracts the waistline opening 1a. Therefore, the waist opening 1a is tightly fitted along the waist of the wearer, and positional displacement and the like are not easily generated. Thereby, even when the sanitary napkin 1 is used in any form of a pant type or an adhesive tape type, good fit can be achieved.

Moreover, the absorbent body 10 of the sanitary napkin 1 is provided with the absorber elastic member 50 which expands and contracts along the longitudinal direction (longitudinal direction). As described above, when the sanitary napkin 1 is worn, the absorber elastic member 50 contracts to lift the absorptive body 10 toward the wearing skin, thereby improving fit and absorbency in the lower crotch. That is, in the present embodiment, the fit of the waist member 20 in the waist portion of the wearer is improved by the stretchability of the stretchable region 20EA, and the wearability of the absorber elastic member 50 can be improved by the stretchability of the absorber elastic member 50. The fit of the absorbent body 10 in the lower crotch of the wearer is improved. Thereby, the conformability of the sanitary napkin 1 as a whole can be improved.

Moreover, the width W20EA provided in the left-right direction of the expansion-contraction area|region 20EA of the front waistline member 20f is larger than the width W50 provided in the left-right direction of the absorber elastic member 50 of the absorptive main body 10 (refer FIG. 6). Here, the width W50 of the absorber elastic member 50 in the left-right direction is the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, the absorber elastic member 50, which is arranged on the most lateral side (for example, the left side) in the left-right direction as shown in FIG. 6 . And the space|interval of the absorber elastic member 50 arrange|positioned at the other most side (for example, the right side) in the left-right direction is shown. According to such a structure, the range of the contraction force acting on the expansion-contraction region 20EA of the front waistline member 20f is wider than the range of the contraction force acting on the absorber elastic member 50 of the absorptive main body 10 in the left-right direction. Therefore, even if the upper end portion of the absorptive body 10 is pulled downward by the contraction force of the absorber elastic member 50, the contraction force by the expansion-contraction area 20EA easily resists the tensile force by the absorber elastic member 50, and it is difficult to The front waistline member 20f is pulled downward. Thereby, the favorable adhesiveness of the sanitary napkin 1 can be maintained easily.

Moreover, the width W20EA in the left-right direction of the expansion-contraction area|region 20EA is larger than the width W11 (the maximum width of the absorptive core 11) in the left-right direction of the absorptive core 11 (refer FIG. 6). That is, in the left-right direction, the range in which the contraction force by the expansion-contraction area|region 20EA acts is larger than the width|variety of the absorptive core 11. Therefore, even if the whole of the left-right direction of the absorptive core 11 is pulled downward by the contraction force of the absorber elastic member 50, the contraction force by the expansion-contraction region 20EA easily resists the tensile force by the absorptive core 11 , and it is not easy to pull down the front waistline member 20f. Thereby, the favorable fit of the sanitary napkin 1 can be maintained more easily.

In addition, the width W20EA in the left-right direction of the expansion-contraction area|region 20EA is larger than the width W10 in the left-right direction of the absorptive main body 10 (refer FIG. 6). That is, in the left-right direction, the range in which the contraction force by the expansion-contraction region 20EA acts is larger than the maximum width of the absorptive main body 10 . Therefore, even if the whole of the left-right direction of the absorptive body 10 is pulled downward by the contracting force of the absorber elastic member 50, the contracting force by the expansion-contraction region 20EA easily resists the tensile force by the absorptive body 10 , and it is not easy to pull down the front waistline member 20f. Thereby, the favorable fit of the sanitary napkin 1 can be maintained more easily.

Moreover, as shown in FIG. 6, the upper end 50et of the front side (abdominal side) of the absorber elastic member 50 is positioned below the lower end 20EAeb of the expansion-contraction area 20EA in the up-down direction. That is, the region where the contraction force by the absorber elastic member 50 acts and the stretchable region 20EA do not overlap each other, and the contraction force by the absorber elastic member 50 is less likely to act with respect to the stretchable region 20EA. According to such a structure, since the contraction force by the absorber elastic member 50 does not interfere easily with respect to the expansion-contraction area|region 20EA, it is hard to generate|occur|produce deflection in the front waistline member 20f. Thereby, when the operation of locking the locking portion 32 to the front waistline member 20f is performed during wearing of the sanitary napkin 1 in the tape-type state, the front waistline member 20f is easily maintained in a flat shape, and the locking portion 32 can be easily retained. Stuck firmly. Therefore, the fit of the sanitary napkin 1 around the waist of the wearer can be further improved.

6, the upper end 50et of the front side (abdominal side) of the absorber elastic member 50 is positioned below the lower end 25eb of the separation portion 25 (separation end 25fe of the front waist member 20f) in the vertical direction. That is, the area where the contraction force by the absorber elastic member 50 acts and the area between the pair of separation parts 25 and 25 do not overlap with each other, and the absorber elastic member 50 does not overlap with the area between the separation parts 25 and 25 . The resulting contraction force is not easy to act. According to such a structure, since the contraction force by the absorber elastic member 50 does not interfere easily, it is hard to generate|occur|produce bending etc. in the area|region between the separation parts 25 and 25 of the front side waist member 20f. Thereby, in the sanitary napkin 1 in the pant-shaped state, the operation of separating the separating portion 25 (separating the front waist member 20f and the rear waist member 20b) can be easily performed. For example, when the separation part 25 is a piercing wire, the operation of tearing the piercing wire can be performed stably. Therefore, even when going out, etc., the operation of putting on and taking off the sanitary napkin 1 can be easily performed.

In addition, in the state where the locking portion 32 is locked to the waist member 20 , it is located on the outer side in the left and right direction than the absorber elastic member 50 and is on the inner side in the left and right direction than the side joint portion 40 of the waist member 20 , It is desirable that the locking portion 32 is located here. As shown in FIG. 6 , the locking portion 32 is locked in a region inside the waistline member 20 (front waistline member 20f ) in the left-right direction. At this time, if the locking portion 32 is locked in a region overlapping with the absorber elastic member 50 in the left-right direction, the region may be pulled downward due to the influence of the contractile force of the absorber elastic member 50. Therefore, it may be difficult to stably perform the locking operation. On the other hand, as long as the locking portion 32 is locked in the region outside the absorber elastic member 50 and inside the side joint portion 40 in the left-right direction, the absorber elastic member 50 is less likely to be received in this region. Therefore, the locking operation of the locking portion 32 can be performed more stably and easily. Thereby, the fit of the waistline member 20 can be further improved at the waistline of the wearer.

Moreover, it is desirable to have both ends 10s and 10s in the left-right direction of the absorptive main body 10, and the part which overlaps with the expansion-contraction area|region 20EA. In other words, it is desirable that at least a part of both ends 10s of the absorptive main body 10 overlap the stretchable region 20EA in the up-down direction. According to such a structure, the edge part 10s of the left-right direction of the absorptive main body 10 is easily pulled to the outer side of the left-right direction by the elasticity of the expansion-contraction area 20EA. That is, the force to expand the absorptive main body 10 can easily suppress excretion leakage, and at the same time, the absorptive main body 10 can not easily float from the wearer's body, and can be easily brought into close contact with the wearer's skin. Therefore, the fit of the absorptive main body 10 at the time of wearing of the sanitary napkin 1 can be improved.

In addition, it is desirable that the entire locking portion 32 overlaps the expansion-contraction region 20EA in the vertical direction. According to such a configuration, since the contraction force by the expansion-contraction region 20EA acts on the entire vertical direction of the locking portion 32, the rear waistline member 20b can be easily moved in the left-right direction via the pair of locking portions 32, 32. The inside pull can further improve the fit of the waist opening 1a in the wearer's waist. In the present embodiment, as shown in FIG. 6 , since the entire vertical direction of the locking portion 32 overlaps with the stretchable region 20EA, the fit of the wearer's waistline can be sufficiently improved when the sanitary napkin 1 is worn.

Moreover, it is desirable that the lower end 32eb of the locking part 32 is positioned above the upper end 11et of the absorptive core 11 in the vertical direction. In other words, in the vertical direction, it is desirable not to have a portion where the locking portion 32 overlaps with the absorptive core 11 . Since the absorptive core 11 contains a superabsorbent polymer (SAP) etc., rigidity becomes high compared with the waistline member 20. Therefore, if the absorptive core 11 exists between the pair of locking portions 32 and 32 in the state of being locked to the waist member 20, the rigidity of the absorptive core 11 prevents the expansion and contraction of the expansion-contraction region 20EA in the left-right direction. , there is a concern that the contraction force is not easily applied between the pair of locking portions 32 and 32 . At this time, the contraction force of the waist opening 1a becomes weak, and the fit in the waist of the wearer tends to deteriorate. On the other hand, in the sanitary napkin 1, as shown in FIG. 6, since the lower end 32eb of the locking part 32 is located on the upper side in the vertical direction rather than the upper end 11et of the absorptive core 11, the locking parts 32, 32 It can suppress that the expansion-contraction of the expansion-contraction area|region 20EA is hindered by the absorptive core 11 in the area|region between. Therefore, good fit of the waistline member 20 can be easily maintained.

Moreover, when the sanitary napkin 1 in the unfolded and stretched state as shown in FIG. 6 is viewed in the thickness direction, the shrinkage force ratio in the left-right direction of the stretchable region 20EA in the portion overlapping with the absorbent body 10 is different from that of the absorbent body 10 . It is desirable that the shrinkage force in the left-right direction of the expansion-contraction region 20EA in the overlapping portion is smaller. In the waistline member 20, if excessive contraction force acts on the region overlapping the absorbent body 10 in the thickness direction, the absorbent body 10 with high rigidity will be bent, and it will be difficult for the wearer's body to be tightly fitted with the surface. concerns. Here, in the stretchable region 20EA, the region overlapping with the absorptive body 10 is made closer to the region not overlapping with the absorptive body 10 by, for example, cutting out a part of the skin-side sheets 22 and 23 (stretchable nonwoven fabric) or the like. The contraction force in the left-right direction becomes small. Thereby, it is suppressed that an excessive contraction force acts on the absorptive main body 10, and it becomes easy to maintain the fit over the entire waistline. In addition, the magnitude|size of the shrinkage force in the left-right direction of the expansion-contraction area 20EA means the magnitude|size of the force which acts when the area|region which becomes an object in the expansion-contraction area 20EA is extended by a unit length along the left-right direction.

Moreover, in the sanitary napkin 1 of this embodiment, the tongue piece 30 provided with the latching part 32 is joined to the waist member 20 via the tongue piece joining part 35 on the outer side of the latching part 32() in the left-right direction. Therefore, the user (wearer) of the sanitary napkin 1 can easily perform the operation of locking or removing the locking portion 32 from the waist member 20 by grasping the portion of the tongue 30 where the locking portion 32 is provided. . Then, a hook member for securing or a loop member for locking the hook member is provided in the locking portion 32 , so that the non-skin side surface of the waist member 20 can be repeatedly put on and taken off. Therefore, in the locking operation of the locking portion 32, the locking position can be easily adjusted. With these structures, connection and adjustment of the front waist member 20f and the rear waist member 20b are easy, and the waist opening 1a can be easily fitted to the waist of the user (wearer).

In addition, the tongue engaging portion 35 is provided at any position from the outer end of the absorbent body 10 to the side engaging portion 40 of the waist member 20 in the left-right direction, in the left-right direction between the tongue engaging portion 35 and the locking portion 32 The separation part 25 is arranged in the area therebetween. In the sanitary napkin 1 of the present embodiment, as described in FIG. 4 , the tongue engaging portion 35 is provided at the same position as the side engaging portion 40 , and is arranged between the tongue engaging portion 35 and the locking portion 32 in the left-right direction. There is a separation part 25 . Therefore, when the user performs the action of separating the separating portion 25, the user grasps the tongue piece 30 with one hand, and grasps the waist member 20 (front waist member 20f) with the other hand, and pulls them in the opposite directions, respectively. The separation part 25 can be easily separated. For example, in FIG. 4A , the front waistline member 20f is pressed with one hand, and the tongue piece 30 (locking portion 32 ) is pulled toward the non-skin side with the other hand, and the force is concentrated on the separation portion 25 , which can be easily torn off. Waist-breaking member 20 . Thereby, the operation of removing the sanitary napkin 1 from the wearer's body or transforming it from a shorts type to an adhesive tape type can be easily performed.

Moreover, as shown in FIG. 2, the front side waistline member 20f is provided with the front side leg hole elastic member 28 along the edge part (namely, the outline of the leg hole opening 1b) of the lower side in an up-down direction. The front leg elastic member 28 is an elastic member such as thread rubber, and is arranged between the thickness directions of the non-skin-side sheet 21 and the skin-side sheet 22 in a state of extending from one side to the other side in the left-right direction (see Fig. 2, Figure 3, etc.). Likewise, the rear waistline member 20b is provided with a rear side leg hole elastic member 29 along the lower edge portion in the vertical direction (that is, the outline of the leg hole opening 1b). The rear leg elastic member 29 is an elastic member such as thread rubber, and is arranged between the thickness directions of the non-skin-side sheet 21 and the skin-side sheet 23 from one side to the other side in the left-right direction (see Figure 2, Figure 3, etc.).

By providing these leg circumference elastic members 28 and 29, stretchability is imparted along the leg circumference opening 1b of the sanitary napkin 1, and the leg circumference opening 1b is easily fitted to the wearer's leg circumference. In particular, in the rear waistline member 20b, the leg openings 1b are likely to rise from the wearer's body (buttocks) or be displaced by the protrusions of the wearer's buttocks and the movement of the wearer's feet. offset. Therefore, by providing the rear side leg circumference elastic member 29 that expands and contracts along the leg circumference opening 1b, the fit of the rear side waist circumference member 20b is improved at the leg circumference of the wearer's buttocks side, and the wearer can be less prone to Discomfort, Discord.

Since it is easy to produce such an effect, at least the rear side leg elastic member 29 is continuously arranged in the left-right direction from the side joint portion 40b of the rear waist member 20b to the outer end portion 10s of the absorptive body 10 so as to be continuous. expect. In the present embodiment, the rear leg hole elastic member 29 is provided continuously from the side engaging portion 40b on the one side to the side engaging portion 40b on the other side in the left-right direction (see FIG. 2 ). Thereby, the fit can be further improved in the area where the wearer's hips are wide around the legs.

Moreover, in the sanitary napkin 1, the stress in the expansion-contraction direction (left-right direction) of the expansion-contraction area 20EA is desirably larger than the stress in the expansion-contraction direction (up-down direction) of the area|region in which the absorber elastic member 50 is arrange|positioned. Here, the measurement of the stress of the expansion-contraction area 20EA can be performed as follows using, for example, an automatic stereogram type tensile tester (eg, AG-1KN1) manufactured by Shimadzu Corporation. First, the front waist member 20f of the sanitary napkin 1 is stretched to such an extent that there is no wrinkles due to the shrinkage of the skin-side sheet 22 on the surface thereof, and after measuring the widthwise dimension of the stretchable region 20EA, the The expansion-contraction region 20EA was cut to this size to prepare a sample. Next, clamp one end of the sample to a fixed jig, and clamp the other end to a movable jig, obtain a size that stretches to about 90% of the initial size at a speed of 300 mm/min, and then reverse the direction to shrink each sample to the initial stage. The tensile load (N) when the size is about 75% of the size is converted into the stress (N/mm) per unit length (mm) as the stress. For the stress in the region where the absorber elastic member 50 is arranged, a predetermined portion of the absorptive main body 10 is cut out to prepare a sample, and the measurement can be performed in the same manner.

In addition, the expansion-contraction area 20EA and the absorber elastic member 50 may be compared using the "tensile modulus". That is, the tension coefficient in the expansion-contraction direction (left-right direction) of the expansion-contraction area 20EA may be larger than the tension coefficient in the expansion-contraction direction (up-down direction) of the area|region in which the absorber elastic member 50 is arrange|positioned. In addition, the elongation coefficient is a coefficient prescribed|regulated to the state which each part is easy to stretch. Such a stretch factor can be calculated, for example, by the following method.

First, the product (sanitary napkin 1 ) to be measured is cut out in the same manner as described above to prepare a sample from the portion of the measurement target (the portion including the stretchable region 20EA and the absorber elastic member 50 ). Next, without applying a tensile load to the cut out sample, it was left to stand in an environment of 20° C. and 60 RH for 60 minutes in a natural state. Then, the wire L is pulled out at the center position in the width direction orthogonal to the stretching direction along the stretching direction of the sample, and the length of the wire L in the natural state is measured. At this time, the wire L was pulled out in a horizontal trapezoid shape without applying a load to the sample, and the length of the wire L was measured. Here, let the length of the line L be the initial length "A". In addition, although the wire L is drawn out as long as possible on the sample, it is important not to overlap the wire L at the position sandwiched by the gripper of the subsequent tensile testing machine in order to reduce the measurement error. Next, hold both ends of the sample in the direction of expansion and contraction in a tensile tester such as an autostereographer manufactured by Shimadzu Corporation, and extend the sample until a load of 0.8 N is applied. The length of the line L at the time of the extension is measured as The length "A'" of the line L in such a state. For example, in a tensile tester, the sample is pulled in the direction of expansion and contraction (pulled vertically upward with respect to the horizontal plane) at a tensile speed of 100 mm/min. Such an elongation coefficient can be calculated from these measured values by the following formula.

Tensile factor=(A’-A)/A

In the sanitary napkin 1 , if the stress (or the coefficient of tension) of the expansion-contraction region 20EA is larger than the stress (coefficient of tension) of the absorber elastic member 50 , the upper end of the absorbent body 10 is moved by the action of the absorber elastic member 50 . The force that pulls the waist down in the left-right direction is easily strengthened by the expansion-contraction region 20EA acting on the waistline member 20 (abdominal waistline member 20f ) to contract in the left-right direction. Therefore, the absorber elastic member 50 resists the force that pulls the upper end portion of the absorptive main body 10 downward in the vertical direction, so that the positional displacement of the waist member 20 is less likely to occur. Thereby, the fit of the waistline member 20 in the waistline of the wearer can be easily maintained.

===Second Embodiment === In the second embodiment, the underpants-type sanitary napkin 2 (hereinafter, also simply referred to as "sanitary napkin 2") having the low-elasticity region 20NA having lower stretchability than the stretchable region 20EA in the waist member 20 will be described. 7 : is the top view which looked at the sanitary napkin 2 in the unfolded and extended state from the skin side in the thickness direction.

The basic structure of the sanitary napkin 2 is almost the same as that of the sanitary napkin 1 of the first embodiment. That is, the sanitary napkin 2 has the liquid-absorbent absorptive main body 10 and the waistline member 20 provided on the non-skin side of the absorptive main body 10 . On the other hand, the sanitary napkin 2 has a low-elasticity region 20NA at least in the front waist member 20f, and the low-elasticity region is adjacent to the left-right direction outer side of the elasticized region 20EA formed by the elastic skin-side sheet 22, and is more elastic than Area 20EA is more less scalable. In other words, the low-elasticity area 20NA is arranged outside the expansion-contraction area 20EA in the left-right direction and at a position overlapping the expansion-contraction area 20EA in the vertical direction (refer to the hatched portion in FIG. 7 ).

In the sanitary napkin 2, the low-stretching region 20NA is formed by, for example, performing a non-stretching treatment on a predetermined region of the skin-side sheet 22. Therefore, the front waistline member 20f has the stretchability in the left-right direction in the stretchable region 20EA, and the low-stretch region 20NA on both sides in the left-right direction has no stretchability, or the stretchability becomes very low.

The front waistline member 20f in the natural state and the wearing state is shrunk in the left-right direction relative to the skin-side sheet 22 in the expansion-contraction region 20EA, and the non-skin-side sheet 21 is not easily shrunk, so a plurality of pieces are formed on the non-skin-side surface. Small wrinkles that extend up and down. On the other hand, in the low expansion-contraction region 20NA, since the skin-side sheet 22 and the non-skin-side sheet 21 do not easily shrink, wrinkles are less likely to be formed on the surface. Therefore, in the front waistline member 20f, it is easy to ensure the shape retention of the sheet member in the low-elasticity region 20NA as compared with the expansion-contraction region 20EA. Therefore, for example, when the operation of peeling off the locking portion 32 locked by the front waist member 20f is performed from the state where the sanitary napkin 2 is worn, deflection or distortion of the sheet member (waist member 20) can be easily suppressed in the vicinity of the low-elasticity region 20NA. Twisting situation. Thereby, the operation|movement which peels off the latching part 32 from the front side waist member 20f becomes easy and smooth. In addition, when the used sanitary napkin 2 is replaced with a new one in the toilet of going out, the shape retention of the front waist member 20f can be easily secured in the vicinity of the low-elasticity region 20NA, so that the locking portion can be easily secured. 32 Actions that are stuck in this area.

In addition, as described above, when the low-stretch area 20NA is formed by de-stretching a sheet member such as a non-woven fabric, the fibers (ring members) of the non-woven fabric are hardened in this area, so the flat fastener ( hook member) is not easily engaged with the surface. Therefore, in the waist member 20 of the sanitary napkin 2, as shown in FIG. 7, the low-elasticity region 20NA is arranged so that the region where the locking portion 32 is locked does not overlap with the low-elasticity region 20NA. In other words, the ranges of the stretchable region 20EA and the low stretchable region 20NA are set so that the locking portion 32 is locked in a region other than the low stretchable region 20NA. However, the locking portion 32 may be locked in the low-elasticity region 20NA itself, and the locking portion 32 may overlap with the low-elasticity region 20NA (non-elasticity region).

When the waist member 20 is provided with the stretchable region 20EA and the low-stretchable region 20NA, the length (width) of the stretchable region 20EA in the left-right direction is preferably longer than the length (width) of the low-stretchable region 20NA in the left-right direction. Like the sanitary napkin 1, the area between the pair of locking portions 32, 32 is locked in the left-right direction, and the waistline member 20 has elasticity in the sanitary napkin 2, so that the waistline of the wearer can be fitted. Sexual enhancement is possible. At this time, if the width of the low-elasticity region 20NA is wider than the width of the elasticized region 20EA, the waist member 20 will have a smaller region where the stretchability acts, and there is a concern that sufficient fit cannot be obtained. On the other hand, in the sanitary napkin 2 as shown in FIG. 7 , the width in the left-right direction of the stretchable region 20EA is wider than the width in the left-right direction of the low-stretchable region 20NA, which can provide sufficient width to the waist member 20 (front waist member 20f ). Scalability. Therefore, the fit of the sanitary napkin 2 can be improved.

Furthermore, as shown in FIG. 7 , by providing the separation portion 25 in the low expansion-contraction region 20NA, the separation operation of the separation portion 25 can be easily performed. For example, when the separating portion 25 is the piercing wire described above, the low-elasticity region 20NA is not easily stretched, so the sheet member constituting the waistline member 20 is easily subjected to a force for tearing the piercing wire, and the separating portion 25 can be easily separated.

===About other features of sanitary napkin 1 and sanitary napkin 2 === The sanitary napkin 1 and the sanitary napkin 2 have the following characteristics in addition to the above-mentioned characteristics.

In the front waistline member 20f (front cloth) of the sanitary napkin 1 and the sanitary napkin 2, when the locking portions 32, 32 are locked, an expansion-contraction region is provided in the entire region sandwiched by the pair of left and right locking portions 32, 32 20EA (refer to Fig. 6 etc.). That is, the center position 32C in the vertical direction of the locking portion 32 not only has the expansion and contraction area 20EA, but also has a pair of locking portions in the vertical direction from the upper end 32et to the lower end 32eb of the locking portion 32 in the left-right direction. The entire rectangular region between 32 and 32 (between inner ends in the left-right direction of 32 and 32 ) has an expansion-contraction region 20EA continuous in the left-right direction.

Therefore, the entire rectangular region sandwiched by the pair of left and right locking portions 32 and 32 contracts in the left-right direction, and the left and right sides of the rear waistline member 20b (rear body cloth) are connected via the pair of locking portions 32 and 32 to the left and right. The direction both ends are easily pulled further inward. Thereby, the waist opening 1a is shrunk to make it easier to fit along the waist of the wearer, and positional displacement and the like are less likely to occur.

Moreover, the absorber elastic member 50 provided in the absorptive main body 10 forms the back side (back side) of the front-back direction of the sanitary napkins 1 and 2, and the length is longer than the length in the front side (abdominal side). 5 shows that the length L50b of the absorber elastic member 50 on the rear side (back side) from the center position CL in the longitudinal direction (long direction) of the sanitary napkin 1 in the unfolded and extended state is longer than the length L50b on the front side (abdominal side) The length L50f of the absorber elastic member 50 is longer (L50b>L50f).

When the sanitary napkins 1 and 2 are worn, the area on the rear side of the center position CL in the front-rear direction is located on the buttocks of the wearer. Therefore, if the absorbent body 10 does not have slits along the buttocks If it is attached, there is a concern that excretory fluid such as menstrual blood will leak to the outside of the absorbent body 10 along the slits of the buttocks. On the other hand, as shown in FIG. 5 , the length L50b of the absorber elastic member 50 on the rear side in the longitudinal direction (longitudinal direction) is set long, and the absorber elastic member 50 can be extended over a wide range on the rear side of the absorbent body 10 . induced contractility. That is, the absorptive main body 10 is pressed against the wearer's body side by the contraction force by the absorber elastic member 50, and it becomes easy to fit firmly with the seam of the buttocks. Thereby, the adhesiveness of the sanitary napkins 1 and 2 is further improved, and the excretion fluid such as menstrual blood can be prevented from leaking.

Furthermore, in the vertical direction of the rear waist member 20b (back cloth) of the sanitary napkins 1 and 2, the rear end 50eb (the upper end of the back) of the absorber elastic member 50 is located further than the lower end 30eb of the tongue piece 30. on the upper side (see Figure 5). That is, the area where the pair of tongue pieces 30 and 30 are arranged in the up-down direction of the rear waistline member 20b (rear body cloth) overlaps at least a part of the area where the absorber elastic member 50 is stretched. According to such a configuration, when the tabs 30 and 30 of the rear waistline member 20b are pulled to both outer sides in the left-right direction during the wearing operation of the sanitary napkins 1 and 2, the force forming the tabs 30 and 30 is also related to the absorber. The elastic members 50 act in conjunction with each other. Therefore, when the wearer grasps the tongues 30 and 30 and pulls them in the left-right direction to engage the front waistline member 20f, the rear upper end portion (including the rear end 50eb) of the absorber elastic member 50 faces left and right. direction pull. Thereby, the rear region of the absorptive main body 10 is less likely to slide downward, and the shrinkage force of the absorber elastic member 50 is more suitable for the groove of the wearer's buttocks.

Also, as shown in FIG. 5 , the length W28 in the left-right direction of the front leg-hole elastic member 28 arranged along the lower edge portion of the front-side waist member 20 f (the outline of the leg-hole opening 1 b ) is longer than the length W28 in the left-right direction along the rear side. The length W29 in the left-right direction of the rear side leg hole elastic member 29 in which the lower edge part (outline of the leg hole opening 1b) of the waistline member 20b is arrange|positioned is shorter (W28<W29). In other words, the sanitary napkins 1 and 2 are formed in the range in which the contraction force in the left-right direction by the front leg elastic member 28 in the front waist member 20f acts than the rear leg elastic member 29 in the rear waist member 20b. The resulting range of contraction force in the left-right direction is narrower. 5 shows a case where the contraction force of the rear waistline member 20b with respect to the rear leg elastic member 29 acts on the entire area in the left-right direction, and the front waistline member 20f is provided with front leg elastics at both ends in the left-right direction. The area where the contraction force due to member 28 has no effect.

Since the both ends of the front waistline member 20f in the left-right direction are not easily contracted, when the sanitary napkins 1 and 2 are worn, the left and right end portions of the front waistline member 20f are grasped, and the locking device can be easily performed. Operation of the tongue piece 30 at the end in the left-right direction of the rear waistline member 20b. That is, by forming the grip portion at the end portion in the left-right direction of the front waist member 20f, the wearing operation of the sanitary napkins 1 and 2 is facilitated, and the sanitary napkins 1 and 2 can be easily fitted to the body.

2 and 6 , in a state where the locking portion 32 of the tongue piece 30 is locked to the front waist member 20f, the front leg elastic member 28 is disposed below the locking portion 32. That is, the position of the upper end of the front-side leg hole elastic member 28 is located on the lower side in the vertical direction than the position of the lower end 32eb of the locking portion 32 . Therefore, in the front waistline member 20f, in the region where the locking portion 32 is locked, the contraction force by the front leg elastic member 28 is less likely to act, so that the sanitary napkins 1 and 2 can be worn more easily. The tongue piece 30 is engaged with the operation of the front waistline member 20f. In addition, in the state where the front waist member 20f is locked with the tongue piece 30, the locking portion 32 does not easily interfere with the stretchability of the front leg elastic member 28, so that the front waist member 20f, the leg opening 1b is easy to wear and tear. Fits the user's groin. Thereby, the fit of the sanitary napkins 1 and 2 can be improved.

Moreover, functional materials, such as a cooling agent, a warming agent, a fragrance|flavor, may be provided in the absorptive main body 10 and the waist member 20 of the sanitary napkins 1 and 2. For example, by providing a cooling agent in a predetermined area on the skin side or the non-skin side of the skin-side sheet 12 constituting the absorbent body 10, a cooling effect can be given to the wearer when the sanitary napkins 1 and 2 are worn.

When a cooling agent is used as a functional material, one known as a general cooling agent in the technical field can be used, but one that is volatile and acts on the receptor activation channel (TRPM8) of the nerve as the skin is preferable. For example, menthol (for example: l-menthol) and its derivatives (for example: menthyl lactate); methyl salicylate; camphor; cucumber extract; derived from plants (for example: peppermint, eucalyptus) , nutmeg) essential oil, etc.

The same applies to the case where a temperature-sensing agent is used as the functional material, and what is used as a general temperature-sensing agent in this technical field can be used. For example, capsaicin, capsaicin (LD50: 47 mg/kg, molecular weight: 305), capsaicinoids (dihydrocapsaicin, protodihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, noniquat etc.), capsanthin, benzyl nicotinate (LD50: 2, 188mg/kg, molecular weight: 213), nicotinic acid-β-butoxyethyl ester, glycerophosphoric acid-N-acetyl ester, nonanoic acid Vanillyl amide, polyol, chili powder, capsicum tincture, capsicum extract, vanillyl ether of nonanoic acid, vanillyl alcohol alkyl ether derivatives (eg, vanillyl alcohol ether, vanillyl butyl ether (LD50: 4, 900 mg) /kg, molecular weight: 210), vanillyl amyl ether, vanillyl hexyl ether), isovanillyl alcohol alkyl ether, ethyl vanillyl alcohol alkyl ether, veratrol derivative, substituted benzyl alcohol derivatives , Substituted benzyl alcohol alkyl ether, vanilla extract propylene glycol acetaldehyde, ethyl vanilla extract propylene glycol acetaldehyde, ginger extract, ginger oil, gingerol (LD50: 250mg/kg, molecular weight: 294), ginger ketone , hesperidin, and pyrrolidone carboxylic acid, and any combination of these.

The same applies to the case where a fragrance is used as the functional material, and what is known as a general fragrance in the technical field can be used. For example, a green herbal fragrance (a fragrance such as green herb) can be used. A fragrance such as green herb is a fragrance containing an aroma such as herb (herbal note) or an aroma such as vanilla (vanilla note). The aroma of herbs refers to the refreshing aroma of grass and new leaves. An aroma such as vanilla (vanilla note) refers to a natural herbal aroma characteristic of using herbs. The fragrance composition of fragrance containing fragrance such as green herbs contains: cis-3-hexenol, cis-3-hexenecarboxylate, cis-3-hexene acetate, cis-3-hexene Hexarylate, cis-3-hexene butyrate, trans-2-hexene acetate, trans-2-hexene acetate, hexyl acetate, phenylethyl acetate, acetic acid 2-Methyl-3-(3,4-methylenedioxyphenyl)-propionium (IFF company name: Helional), 3(4)-(5-ethylbicyclo[2,2,1] Heptyl-2-)-cyclohexanol, allyl 2-pentoxyglycolate (IFF company name: allylpentylglycolate), 4-methyl-3-decen-5-ol ( Givaudan company name: methyldecenol), hexanal, 2,4-dimethyl-3-cyclohexenylcarbaldehyde (IFF company name: privet aldehyde), and one or two selected from phenylacetaldehyde More than one kind of spice is ideal.

Moreover, these functional materials may be arrange|positioned in the state which contained the water-disintegrable microcapsule as a core material. A water-disintegrable microcapsule refers to a capsule having a size of 1 to 1,000 μm in diameter and having a space containing a core material (cooling component). The above-mentioned capsule contains a core material and its external shape is not particularly limited as long as the release of the core material can be controlled. In addition, the capsule may be a mononuclear type having one space for holding a core material, a polynuclear type having a plurality of spaces for holding a core material, or a structure in which a fine particle-like core substance is dispersed inside the particle. , or a matrix type in which a liquid core material is immersed. As the shape of the above-mentioned space, a space shape such as a spherical shape and an indeterminate shape can be mentioned.

Microcapsules change the membrane material (wall material) containing the core material (or contained) by chemical stimulation, and release the contained (or contained) components. The chemical stimulation includes, for example, contact between a liquid (aqueous solution) such as a bodily fluid and the wall material of the microcapsule. Such chemical stimuli are imparted to the walls of the microcapsules, which may cause the collapse of the wall material. As a result, in the case of starting the release of the core material (functional material) in the microcapsule, or releasing it slowly before stimulation, the degree of release can be accelerated.

In addition, the above-mentioned microcapsules are sold, for example, INCAP (trade name) sold by Symrise Corporation, and the like. The above-mentioned microcapsules can be produced by dissolving the materials of the microcapsules in water to form an aqueous solution, mixing a cooling component and a surfactant in the aqueous solution, and drying under reduced pressure while spraying the aqueous solution. In addition, although the microcapsules are exemplified with respect to water-disintegrable microcapsules, microcapsules of functional materials and the like may be clasped in cyclodextrin.

===Other=== The above-described embodiments are intended to facilitate the understanding of the present invention, and are not intended to limit the present invention for interpretation. The present invention can be changed and improved without departing from the gist, and it goes without saying that the present invention also includes the equivalents thereof.

In the above-described embodiment, the skin-side sheets 22 and 23 constituting the waist member 20 are stretchable in the left-right direction by using a stretchable sheet such as a stretchable nonwoven fabric. However, the waist member 20 may be Set up other telescopic elements. For example, as shown in FIG. 2 , waist elastic members 27 such as thread rubber or the like may be provided on the upper ends of the front waistline member 20f and the rear waistline member 20b so as to be extendable and retractable in the left-right direction, respectively. By providing such a waist elastic member 27, the fit in the waist opening 1a is further improved, and the positional displacement of the waist member 20 can be suppressed when the sanitary napkin 1 is worn.

In addition, when the waist elastic member 27 is provided in the waist member 20, at least a part of the waist elastic member 27 may be arranged to overlap with the skin-side sheets 22 and 23, respectively. In this way, the stretchability in the left-right direction by the waist elastic member 27 and the stretchability in the left-right direction by the skin-side sheets 22 and 23 are linked to further improve the fit of the sanitary napkin 1 in the wearer's waist.

In the above-described embodiment, the sanitary napkins 1 and 2 are in the adhesive tape state after the waist member 20 is separated by the separation portion 25, and the tongue piece 30 is joined to the rear waist member 20b (rear body cloth) side. An example in which the locking portion 32 is locked to the front waistline member 20f (front cloth) has been described, but the arrangement of the tongue pieces 30 is not limited to this. For example, after the waist member 20 is separated, the tongue piece 30 may be provided on the front waist member 20f (front cloth) side, and the locking portion 32 may be locked to the rear waist member 20b (back cloth). 2 etc., since the skin-side sheet 23 having elasticity is provided in the rear waistline member 20b, the rear waistline member 20b also has the same stretchable region as the stretchable region 20EA of the front waistline member 20f. Therefore, even when the pair of locking portions 32 and 32 is locked to the rear waistline member 20b, since the region between the locking portions 32 and 32 has elasticity, it is possible to make the wearer's waistline fit. Improve compatibility.

In the above-described embodiment, the example in which the pair of locking portions 32 are provided on both sides in the left-right direction has been described, but a plurality of pairs of locking portions 32 may be provided. For example, by arranging the two locking portions 32 apart in the up-down direction, it is also possible to produce a pants-type absorbent article having two pairs of locking portions 32 . In this case, as long as an expansion-contraction region is provided in the vertical center position of any one pair of the locking portions in the plurality of pairs of locking portions, the waist opening is easily contracted between the locking portions, so that the above-mentioned advantages can be achieved. of fit.

1: Sanitary napkin (pants-type absorbent article) (first embodiment) 1a: Waist opening 1b: Leg circumference opening 2: Sanitary napkin (pants-type absorbent article) (second embodiment) 10: Absorbent body 11: Absorbent core 12: Top Flakes 13: back sheet 13a: Liquid-impermeable sheet 13b: Hydrophobic flakes 20: Waist member 20f: Front waist member 20b: Rear waist member 20EA: Flex Area 20NA: low stretch area 21: Non-skin side flakes 22: Skin side flakes 23: Skin side flakes 25: Separation Department 25fe: split end 25be: split end 27: Waist elastic member 28: Front leg elastic member 29: Elastic member of rear leg circumference 30: Tongue 31: substrate sheet 32: Locking part 35: Tongue joint 40: Side joint 40f: end 40b: end 50: Absorber elastic member CL: Central position 32C: Central location 32eb: lower end 32et: upper end 25eb: lower end W50: width 50et: upper end 20EAeb: lower end 11et: upper end 10s: Outer end W10: width W11: width W20EA: Width

1 is a schematic perspective view of the sanitary napkin 1 according to the first embodiment. [ Fig. 2 ] is a plan view of the sanitary napkin 1 in an opened and stretched state viewed from the skin side in the thickness direction. [ Fig. 3] Fig. 3 is a schematic cross-sectional view taken along line A-A of Fig. 2 . 4A and 4B are diagrams for explaining the operation of separating the waist member 20 of the sanitary napkin 1 into the front waist member 20f and the rear waist member 20b. 5 is a development plan view of the sanitary napkin 1 in a state in which the front waistline member 20f and the rear waistline member 20b are separated. [ Fig. 6 ] is a plan view showing a state in which the sanitary napkin 1 in the tape-type state is again made into a pant-type and stretched. [ Fig. 7] Fig. 7 is a plan view of the sanitary napkin 2 in an expanded and stretched state viewed from the skin side in the thickness direction.

1b: Leg circumference opening

10: Absorbent body

10s: Outer end

11: Absorbent core

11et: upper end

20b: Rear waist member

20f: Front waist member

20EAeb: lower end

20EA: Flex Area

22: Skin side flakes

25eb: lower end

25fe: split end

28: Front leg elastic member

29: Elastic member of rear leg circumference

30: Tongue

32: Locking part

32C: Central location

32eb: lower end

32et: upper end

35: Tongue joint

40: Side joint

50: Absorber elastic member

50et: upper end

W10: width

W11: width

W50: width

W20EA: Width

CL: Central position

Claims (25)

A shorts-type absorbent article has up-down, left-right, and front-rear directions intersecting with each other, Furthermore, it has an absorptive main body, and a waist member arranged to overlap with the non-skin side of the absorptive main body, and the pants-type absorbent article is characterized by: It has a separation part for separating the waist member into a pair for the front body cloth and the back body cloth, At least one pair of locking portions are provided on both sides in the left-right direction of one of the front body cloth and the rear body cloth so as to be detachably locked in predetermined regions of the other of the front body cloth and the rear body cloth , The said other side of the said front body cloth and the said back body cloth has the expansion-contraction area|region which can expand and contract along the said left-right direction in the center position of the said latching part in the said up-down direction. The shorts-type absorbent article of claim 1, wherein, The said absorptive main body has the absorber elastic member which expands and contracts along the longitudinal direction of the said absorptive main body. The shorts-type absorbent article of claim 2, wherein, A plurality of said absorber elastic members are provided at predetermined intervals in the said left-right direction, The width ratio in the left-right direction of the expansion-contraction region is the absorber elastic member arranged on the most side in the left-right direction, and the absorber elastic member arranged on the other most side in the left-right direction. The spacing in the left-right direction is larger. The pants-type absorbent article according to claim 2 or 3, wherein, The aforementioned absorbent body has an absorbent core containing a superabsorbent polymer, The width|variety in the said left-right direction of the said expansion-contraction area|region is larger than the width|variety in the said left-right direction of the said absorptive core. The shorts-type absorbent article according to any one of claims 2 to 4, wherein, The width|variety in the said left-right direction of the said expansion-contraction area is larger than the width|variety in the said left-right direction of the said absorptive main body. The shorts-type absorbent article according to any one of claims 2 to 5, wherein, In the vertical direction, the upper end of the front side of the absorber elastic member is positioned lower than the lower end of the expansion-contraction region. The shorts-type absorbent article according to any one of claims 2 to 6, wherein, In the vertical direction, the upper end of the front side of the absorber elastic member is positioned lower than the lower end of the separation portion. The shorts-type absorbent article according to any one of claims 2 to 7, wherein, Both ends in the left-right direction have a pair of side joints for joining the front cloth and the rear cloth to each other, In a state where the locking portion is locked to the waist member, the locking portion is located outside the absorber elastic member in the left-right direction, and is positioned more inward in the left-right direction than the side joint portion. The shorts-type absorbent article according to any one of claims 1 to 8, wherein, It has the said expansion-contraction area|region and the part which overlaps with the both ends in the said left-right direction of the said absorptive main body in the said vertical direction. The shorts-type absorbent article according to any one of claims 1 to 9, wherein, When viewed in the thickness direction in the unfolded and stretched state, the shrinkage force in the left-right direction of the stretchable region in the portion where the stretchable region overlaps with the absorbent body is greater than that in the portion where the stretchable region and the absorbent body do not overlap The contraction force in the aforementioned left-right direction of the expansion-contraction region is smaller. The shorts-type absorbent article according to any one of claims 1 to 10, wherein, has a low-stretch region that is less stretchable than the aforementioned stretch region, The said low expansion-contraction area|region is arrange|positioned at the outer side rather than the said expansion-contraction area|region in the said left-right direction. The pants-type absorbent article according to claim 11, wherein At least a part of the said low expansion-contraction area|region is located outside the said expansion-contraction area|region in the said left-right direction, and is arrange|positioned at the position which overlaps with the said expansion-contraction area|region in the said vertical direction. The pants-type absorbent article according to claim 11 or 12, wherein The width in the left-right direction of the expansion-contraction region is larger than the width in the left-right direction of the low expansion-contraction region. The shorts-type absorbent article according to any one of claims 1 to 13, wherein, In the vertical direction, the entirety of the locking portion overlaps with the expansion-contraction region. The shorts-type absorbent article according to any one of claims 1 to 14, wherein, The aforementioned absorbent body has an absorbent core containing a superabsorbent polymer, In the vertical direction, the lower end of the locking portion is positioned above the upper end of the absorptive core. The shorts-type absorbent article according to any one of claims 1 to 15, wherein, There is a tongue piece, which is provided with the aforementioned locking portion, On the outer side of the locking portion in the left-right direction, a tongue engaging portion for engaging the tongue with the waist member is provided, A hook member or a loop member of the flat fastener is provided on the locking portion. The pants-type absorbent article of claim 16, wherein, Both ends in the left-right direction have a pair of side joints for joining the front cloth and the rear cloth to each other, In the left-right direction, the tongue engaging portion is provided at any position from the outer end of the absorptive body to the side engaging portion, The separating portion is arranged between the tongue engaging portion and the locking portion. The pants-type absorbent article according to any one of claims 1 to 17, wherein, The said back body cloth has the leg elastic member which can expand and contract in the said left-right direction along the lower side edge part of the said back body cloth. The shorts-type absorbent article according to any one of claims 1 to 18, wherein, The absorptive body has an absorber elastic member that expands and contracts along the longitudinal direction of the absorptive body, The stress in the left-right direction of the expansion-contraction region is larger than the stress in the vertical direction of the region in which the absorber elastic member is arranged. The shorts-type absorbent article according to any one of claims 1 to 19, wherein, The other of the front body cloth and the rear body cloth is between the upper end and the lower end of the locking portion in the vertical direction, and between the inner ends of the pair of locking portions in the left-right direction. The whole has the aforementioned expansion and contraction area. The shorts-type absorbent article according to any one of claims 1 to 20, wherein, The absorptive body has an absorber elastic member that expands and contracts along the longitudinal direction of the absorptive body, In the longitudinal direction, the length of the absorber elastic member on the rear side from the center position is longer than the length of the absorber elastic member on the front side from the center position. The pants-type absorbent article of claim 21, wherein, The back cloth has a tongue, which is provided with the locking portion, In the vertical direction, the upper end of the rear side of the absorber elastic member is positioned above the lower end of the tongue piece. The shorts-type absorbent article according to any one of Claims 1 to 22, wherein, The front leg circumference elastic member is provided along the lower end edge in the vertical direction of the front body cloth, and the rear leg circumference along the lower end edge in the vertical direction of the rear body cloth is provided elastic member, The length in the left-right direction of the front-side leg hole elastic member is shorter than the length in the left-right direction of the rear-side leg hole elastic member. The pants-type absorbent article according to claim 23, wherein In the up-down direction, the upper end of the front-side leg hole elastic member is positioned lower than the lower end of the locking portion. The underpants-type absorbent article according to any one of claims 1 to 24, wherein, A functional material containing at least any one of a cooling agent, a warming agent, and a fragrance is provided in at least any predetermined region of the absorptive main body and the waist member.

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