TW201932086A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article capable of better securing a space for accommodating excreta on the buttock side during wearing. An absorbent article (10) has a front-rear direction, a width direction orthogonal to the front-rear direction, a front waist region (S1), a rear waist region (S2), a crotch region (S3) between the front and rear waist regions, and an absorbent core (51) provided at least in the crotch region. A fold line (FL) for folding the absorbent article in half extends along the width direction in the crotch region. The absorbent core has a constriction area (CA) which is constricted inwardly in the width direction at least in the crotch region, and a pair of grooves (54) formed on both sides with respect to the center of the absorbent article in the width direction. The constriction area extends in the front-rear direction with respect to the fold line. The absorbent core has a rear widening portion (54r) in which the distance between the pair of grooves increases with the transition in the rearward direction. A front end edge (54s) of the rear widening portion is located in the area overlapping with the constriction area ahead of the fold line.

Description

Absorbent article

The present invention relates to an absorbent article such as disposable diapers.

The absorbent article of the disposable diaper as disclosed in Patent Document 1 includes a frontal perimeter region (ventral portion) disposed around the front chin of the wearer, and a peripheral diaper region disposed on the wearer. The posterior region (dorsal portion) and the subfemoral region arranged under the wearer's stock. The absorbent core that absorbs the body fluid of the wearer extends from the surrounding area of the anterior condyle to the surrounding area of the posterior condyle.

In the absorbent article of the reference document 1, an absorbent core is a non-fiber accumulation part which has a pair extended along the front-back direction of an absorbent article. The pair of non-fiber-receiving portions are located symmetrically with reference to a center line extending in the front-rear direction through the center of the absorbent article in the width direction. The non-fiber-forming section extends from the peri-anterior region to the antero-posterior region in a forward-backward direction. The non-fiber accumulating portion is constituted by a through hole in which the core forming material constituting the absorbent core does not exist at all.
[Prior technical literature]
[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2017-38915

As a result of intensive research, the inventors of the present case found the following problems. That is, in a state where the absorbent article is installed by the wearer, the substrand region of the absorbent article, especially near the center of the absorbent article in the front-back direction, is held between the feet of the wearer, so that The center of the width direction is deformed such that it is crushed. With this deformation, the rear area is also deformed toward the center in the width direction than the center of the absorbent article in the front-back direction. However, if the area on the rear side is deformed so as to be crushed toward the center in the width direction than the center of the absorbent article in the front-back direction, it becomes difficult to secure a space for accommodating (area of the absorbent core) on the hip side, and it is easy Causes leakage.

Therefore, an absorbent article which can secure a space for accommodating the stool on the hip side during wearing is desired.

An aspect of the absorbent article includes a front-rear direction, a width direction perpendicular to the front-rear direction, a frontal perimeter area, a rear perimeter area, and a front perimeter area and the rear hem. The substrand domain between the surrounding regions, and an absorbent core provided at least in the aforementioned substrand domain. A folding line for folding the absorbent article in half extends in the width direction in the lower strand region. The absorbent core includes a narrow area that shrinks at least in the widthwise direction toward the inner side in the width direction, and a pair of grooves formed on both sides of the center of the absorbent article in the width direction. The narrow area extends toward the front-rear direction with respect to the fold line. The said absorbent core has a rear widening part which expands as the space | interval between the said pair of groove | channels goes to the rear. The front edge of the rear widened portion is an area located more forward than the fold line and overlapping the narrow area.

(1) Outline of the Example At least the following matters will become apparent from the description in this specification and the accompanying drawings.

An aspect of the absorbent article includes a front-rear direction, a width direction perpendicular to the front-rear direction, a frontal perimeter area, a rear perimeter area, and a front perimeter area and the rear hem. The underline area between the surrounding areas, and the absorbent article at least the absorbent core provided in the above-mentioned area, the fold line for folding the absorbent article in half is extended along the width direction in the above-mentioned area, and the absorbent core is The narrow area at least narrows toward the inner side in the width direction and a pair of grooves formed on both sides of the center of the absorbent article in the width direction. The narrow area corresponds to the polyline. Extending in the front-rear direction, the absorbent core has a rear widened portion that expands as the distance between the pair of grooves toward the rear faces, and the front edge of the rear widened portion is located more forward than the fold line. And an area overlapping the aforementioned narrow area.

According to this aspect, the polyline of the lower thigh area and the front side area are easily narrowed by the absorbent core and a pair of grooves, and are held by the wearer's two feet, making it easy to be centered toward the width Deformation in the manner of crushing, even if the trench is closed. During wearing, the wearer's feet often move at a position corresponding to the front side than the fold line, so the wearer easily moves his feet.

The pair of grooves has a rear widening portion that expands as the gap between the pair of grooves faces toward the rear. The front edge of the rear widening portion is an area located more forward than the fold line and overlapping the narrow area. . Because the front edge of the rear widened portion is located in the area overlapping the narrow area, the absorbent core can be easily crushed toward the inner side in the width direction by a pair of grooves in the rear portion of the narrow area, and it can follow the direction The wearer's hip side gradually widens the width of the pair of grooves. Thereby, it is possible to secure a rear portion of the narrow area, that is, a space for accommodating the stool in the area where the stool is attached.

In addition, the length between the wearer's buttocks and feet's boundary line (meat split line) is expanded as they go from the wearer's thigh to the dorsal side. The front edge of the rear widened portion is located more forward than the fold line, which can correspond to the increase in the length of the wearer's buttocks and feet's border line (meat split line). Widened. This makes it easy to fit the wearer's body shape to secure a space for accommodating stools on the buttocks side, and it is possible to suppress leakage of body fluids.

According to a preferred aspect, the rear side edges of the pair of grooves are located within the range of the narrow area in the front-back direction.

That is, the rear edge of a pair of grooves is located in the range of a narrow area, and the grooves of a pair do not extend further to the rear side than a narrow area. Accordingly, in a region further behind the movable range of the wearer's feet, the absorbent core is less likely to be crushed toward the inner side in the width direction, making it easier to secure a toilet.

According to a preferred aspect, the pair of grooves does not reach the outer edge of the absorbent core in the width direction.

This prevents breakage of the absorbent core caused by a pair of grooves, and can prevent the absorbent cores adjacent to the grooves from being overlapped with each other and deformed. Accordingly, the absorbent core is easily curved in the width direction and into the shape of a cup that easily retains body fluids and the shape of the body.

According to a preferred aspect, the absorbent core is the narrowest part having the shortest length of the absorbent core in the width direction in the narrow area, and the narrowest part of the absorbent core is along the front and rear. Direction.

According to this aspect, since the narrowest portion of the absorbent core extends in the front-rear direction, the area where the absorbent core is easily crushed in the width direction is changed in length. This makes it easier for the wearer to move his feet while wearing the absorbent core during wearing.

According to a preferred aspect, the narrowest portion of the absorbent core extends farther back than the fold line.

According to this aspect, since the narrowest portion of the absorbent core extends rearward than the fold line, the area in which the absorbent core easily collapses in the width direction extends until the rearward. This makes it easier for the wearer to move his feet to the rear side.

According to a preferred aspect, the pair of grooves has a front widening portion that expands as an interval between the pair of grooves faces forward.

The distance between the pair of grooves which is the starting point of the deformation of the absorbent core 51 is also wide on the ventral side. Therefore, it is easy to ensure the absorption area of the body fluid on the ventral side, and the leakage of the body fluid can be more suppressed.

According to a preferred aspect, an interval between the pair of grooves in the inferior strand region is 1/4 or more of a maximum width of the absorbent core in the width direction.

According to this aspect, since the grooves of a pair have a certain width with a certain interval between them, the area between the grooves of a pair can be ensured widely. Thereby, the area of the absorbent core can be maintained between a pair of grooves.

According to a preferred aspect, the absorbent core is the narrowest portion having the shortest length of the absorbent core in the width direction in the narrow area, and the outer edges of the pair of grooves in the width direction, It is located further inside than the narrowest part of the said absorbent core.

Accordingly, it is possible to suppress the breakage of the absorbent core caused by the pair of grooves, and it is possible to prevent the absorbent cores adjacent to the grooves from being overlapped with each other and deformed. Accordingly, the absorbent core is easily curved in the width direction and into the shape of a cup that easily retains body fluids and the shape of the body.

According to a preferred aspect, there is a leak-proof cuff extending in the front-rear direction, which is a pair of leak-proof cuffs that are arranged on both sides of the center that holds the width direction. The rear side of the trailing edge is a pair of dashed lines having cuff joints that cannot be erected toward the skin surface side, and a pair of dotted lines extending the pair of grooves rearward in the direction in which the pair of grooves extend. The width direction passes outside the cuff joint portion.

A pair of dashed lines that extend a pair of grooves in the direction in which the pair of grooves extend rearward is a line that becomes a wrinkle that easily forms a starting point where the absorbent core collapses inward in the width direction. Since this line passes outside in the width direction than the cuff joint portion, in the area of the back side, the area of the absorbent core can be secured in the entire area between the pair of leak-proof cuffs.

According to a preferred aspect, the high-rigidity field is a region located further behind the fold line and includes the center of the width direction. The high-rigidity field is obtained by having a rigidity greater than that of the fold line and the high-rigidity field. The length of the high-rigidity area in the front-back direction is longer than the length from the fold line to the leading edge of the high-rigidity area.

The high-rigidity area has higher rigidity than the area between the polyline and the high-rigidity area, so it is difficult to deform inward in the width direction. Therefore, the absorbent core is difficult to be deformed toward the inner side in the width direction in a high-rigidity area and a rear area. This makes it easy to secure a space for accommodating feces on the buttocks side, and it is possible to suppress leakage of body fluids.

According to a preferred aspect, at least a part of the high-rigidity region is located more rearward than the rear edge of the pair of grooves.

The high-rigidity area is more rearward than a pair of grooves that easily crush the absorbent core toward the inner side in the width direction, so it is compatible with the ease of movement of the wearer's foot in the subthigh and the absorption in the buttock side The area of the core is ensured.

According to a preferred aspect, the high-rigidity region is a region overlapping the grooves of the pair as seen from the width direction, and extends toward the rear side of the rear edge of the grooves of the pair.

The area in which the polyline is formed in the lower part of the stock is a pair of grooves, and becomes the crushing-prone part in the widest direction. The high-rigidity area is an area that overlaps with a pair of grooves as viewed from the width direction. The high-rigidity area is a part that is difficult to crush in the width direction from the area where the polyline is formed. Further, the portion extending further to the rear side than the rear end edge of the pair of grooves in the high-rigidity region does not have a pair of grooves, and thus becomes a portion that is difficult to crush in the width direction. In this way, the absorbent core becomes difficult to collapse in the width direction as it goes from the position of the fold line of the lower thigh area to the rear. Thereby, the area of an absorbent core can be ensured more as it goes to the back.

According to a preferred aspect, the high-rigidity area is an area provided between the pair of grooves in the width direction.

By providing a high-rigidity area between a pair of grooves that make the absorbent core the starting point of deformation, the high-rigidity area can be flattened as a whole, and the area of the absorbent core can be more ensured.

According to a preferred aspect, the high-rigidity area is adjacent to the pair of grooves in the width direction.

Since the high-rigidity area is adjacent to a pair of grooves, the area between the pair of grooves can be flattened as a whole, and the area of the absorbent core can be more ensured.

According to a preferred aspect, the high-rigidity area is provided in an area overlapping the narrow area as viewed from the width direction.

Among the areas farther back than the polyline, the high-rigidity area is an area that overlaps with the narrow area as viewed from the width direction. Therefore, as the absorbent core deviates from the movable range of the wearer's foot toward the rear side, it becomes difficult to collapse in the width direction. Therefore, the area of the absorbent core can be more ensured as it goes toward the rear.

(2) Structure of absorbent article Hereinafter, the absorbent article of an Example is demonstrated with reference to drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar symbols. However, the drawings are only for illustrative purposes, and it should be noted that the ratio of each size is different from the actual one. Therefore, specific dimensions and the like should be judged with reference to the following description. In addition, the drawings include portions having different dimensional relationships and ratios.

Fig. 1 is a schematic view of an absorbent article according to an embodiment. Fig. 2 is a developed plan view of an absorbent article according to an embodiment. FIG. 2 shows an extended state that is stretched until a state where the absorbent article is not wrinkled in an unfolded state in which a side locking portion described later is deployed. Fig. 3 is a cross-sectional view of the absorbent article taken along the line A-A in Fig. 2. Fig. 4 is a plan view of an absorbent core of an absorbent article.

The absorbent article 10 has a front-back direction L and a width direction W that intersect each other perpendicularly in the expanded state. The front-rear direction L is configured by a direction extending toward the front side (ventral side) and the back side (back side) of the body. In other words, the front-rear direction L is a direction extending forward and backward in the deployed absorbent article 10. In addition, the absorbent article 10 has a thickness direction T that vertically intersects both the front-back direction L and the width direction W.

The absorbent article 10 includes a frontal region S1 and a rear region S2, and a subfemoral region S3. The frontal region S1 is an area facing the wearer's frontal region S1. The area around the hindquarters S2 is an area facing the periphery of the back of the wearer. The subfemoral domain S3 is an area located under the wearer's stock, and is disposed between the frontal periphery domain S1 and the rearward periphery domain S2.

In this embodiment, the absorbent article 10 may include a front chin surrounding member 20, a back chin surrounding member 30, and an absorbent body 40. The forefoot surrounding member 20 is disposed in the forefoot surrounding area S1. The posterior perimeter member 30 is disposed in the posterior perimeter region S2. The front chin surrounding member 20 and the back chin surrounding member 30 may be made of, for example, a sheet of non-woven fabric.

The front palate peripheral member 20 may include, for example, two layers of non-skin surface-side sheets superposed and two layers of cover sheets 70 superimposed. In the aspect shown in FIG. 4, the non-skin surface side sheet and the cover sheet 70 are composed of an integrated sheet. Specifically, the cover sheet 70 is configured by folding back (refolding) the non-skin-side sheet from the front edge of the frontal region S1. Instead of this, the non-skin surface side sheet and the cover sheet 70 may be constituted by separate sheets.

In the aspect shown in FIG. 2, a first elastic member 71 extending in the width direction W is provided near the rear end edge 70 e of the cover sheet 70. The cover sheet 70 may be bonded to the absorbent body 40 by a bonding member 74 such as a thermal fusion adhesive on the front side than the first elastic member 71.

The fold line FL that divides the absorbent article 10 back and forth can pass through the substrand domain S3. The fold line FL extends along the width direction W. That is, in the state shown in FIG. 1, the absorbent article 10 is folded in half at a base point with a fold line FL extending in the width direction W.

The side latching portion 60 may be provided at an end portion of the front hip surrounding area S1 in the width direction W and an end of the back hip surrounding area S2 in the width direction W. The side locking portion 60 is constituted by a portion that is locked between the end portion of the front hip region S1 in the width direction W and the end of the back hip region S2 in the width direction W.

The ends of the front perimeter region S1 in the width direction W and the ends of the perimeter region S2 in the width direction W are in the state of being locked by the side locking portions 60 in the absorbent article. In 10, a perimeter opening portion 62 through which the wearer's chin penetrates, and a pair of perimeter opening portions 66 for the foot of the wearer are inserted, respectively. The perimeter opening edge 64 forming the perimeter opening portion 62 can be configured by a front edge of the front perimeter member 20 and a rear edge of the rear perimeter member 30. In addition, the foot periphery opening edge 68 forming the foot periphery opening portion 66 can be formed by a side edge 40l of the absorptive body 40 extending in the front-rear direction L, and a side edge 20l located on the rear side of the front hip periphery member 20, and The side 30l located on the front side of the scapular peripheral member 30 is configured.

Here, FIG. 2 shows a state in which the locking in the side locking portion 60 is released and the absorbent article 10 is unfolded. The side locking portions 60 are formed in the front chin surrounding member 20 and the rear chin surrounding member 30, and may extend along the front-rear direction L, respectively. In this case, the boundary between the frontal perimeter area S1 and the subfemoral area S3 can be formed by the rear edge of the side locking portion 60 provided on the frontal perimeter member 20. Similarly, the boundary between the scapular region S2 and the subfemoral region S3 can be formed by the front edge of the side locking portion 60 provided in the scapular region 30.

One or a plurality of elastic members 32 may be provided in the rear perimeter area S2 to expand and contract in the width direction W. Instead of this, the elastic member 32 of the back perimeter area S2 may be composed of an elastic sheet that can be expanded and contracted in the width direction W.

In the frontal region S1, one or a plurality of second elastic members 22 may be provided, which are capable of expanding and contracting in the width direction W. The second elastic member 22 is composed of elastic threads. The second elastic member 22 can be provided on the non-skin surface side in the frontal region S1 than the absorbent body 40. Further, an elastic sheet 90 that can expand and contract in the width direction W may be provided in the front perimeter region S1. The stretchable sheet 90 may be provided in a region that does not overlap the second elastic member 22 in the thickness direction T.

The absorptive body 40 is arranged so as to straddle the front chin surrounding member 20 and the back chin surrounding member 30. In other words, the absorptive body 40 extends across the frontal sacral region S1, the posterior sacral region S2, and the subfemoral region S3.

The absorptive body 40 may be separately formed from the front chin surrounding member 20 and the back chin surrounding member 30. In this case, the absorptive body 40 can be joined to the anterior condyle peripheral member 20 and the posterior condyle peripheral member 30 in the anterior condyle peripheral area S1 and the posterior condyle peripheral area S2, respectively.

The absorbent body 40 includes at least an absorbent body 50. Further, the absorbent body 40 may include a skin surface sheet 41 on the skin surface side of the absorber 50 and a non-skin surface sheet 42 on the non-skin surface side of the absorber 50. The skin surface sheet 41 can cover the absorber 50 with the skin surface side of the absorber 50. The non-skin surface sheet 42 may cover the absorber 50 with the non-skin surface side of the absorber 50.

The skin surface sheet 41 is made of, for example, a liquid-permeable sheet such as a non-woven fabric or a perforated plastic film. The skin surface sheet 41 may be composed of a single sheet. Instead of this, the skin surface sheet 41 may be composed of a laminated sheet in which a plurality of sheets are stacked on each other.

The non-skin surface sheet 42 may include a liquid-impermeable sheet. The liquid-impermeable sheet may be made of, for example, a liquid-impermeable film such as a plastic film. The non-skin surface sheet 42 may be composed of a single sheet. Instead of this, the non-skin surface sheet 42 may be composed of a laminated sheet in which a plurality of sheets are stacked on each other. In this case, at least one of the plurality of sheets may be liquid-impermeable.

The absorbent body 50 may include an absorbent core 51 and a core wrap 52 covering the absorbent core. The absorbent core 51 may contain, for example, pulverized pulp, superabsorbent polymer (SAP), or a mixture of these. The core wrap 52 may be made of, for example, tissue paper or non-woven fabric.

The absorbent core 51 is arranged at least in the substrand domain S3. Preferably, the absorbent core 51 extends in the front-rear direction L from the frontal region surrounding the region S1 across the rearward region surrounding the region S2.

The absorbent core 51 is a narrow area CA having at least the subfemoral area S3 capable of contracting inward in the width direction W. The narrow area CA can extend in the front-rear direction L with respect to the fold line FL. The narrowest portion LA of the absorbent core 51 in the width direction W may be provided in the substrand region S3. The narrowest portion of the absorbent core 51 may extend in the front-rear direction L. In this case, the fold line FL can pass through the narrow area CA of the absorbent core 51.

The absorptive body 40 may have the side sheet 43 which covers both sides of the skin surface sheet 41 in the width direction W. The side sheet 43 is, for example, a sheet made of a non-woven fabric or a perforated plastic film.

The absorbent body 40 may have a pair of leak-proof cuffs 46. The pair of leak-proof cuffs 46 extends between the front chin surrounding area S1 and the back chin surrounding area S2 in the front-rear direction L, and the center of the absorbent article 10 in the width direction W is placed on both sides. The pair of leak-proof cuffs 46 is constituted by a rising portion (part of the range B in FIG. 2) that can stand up to the wearer's skin.

The leak-proof cuff 46 may include a side sheet 43 and a third elastic member 47 provided on the side sheet 43. The third elastic member 47 is configured to be expandable and contractible in the front-rear direction. The third elastic member 47 may include one or a plurality of rubber threads. Specifically, in one example, an inner portion of the side sheet 43 in the width direction W is folded back (refolded) toward the outside, and a third elastic member 47 is disposed at a portion of the side sheet 43 that is folded back (refolded). In addition, the inner edge of the side sheet 43 in the width direction W is not bonded to the skin surface sheet 41 and constitutes a free end that can stand from the skin surface sheet 41.

The rear side of the rear edge of the pair of leak-proof cuffs 46 has a cuff joint portion 46j that cannot be erected to the skin surface side. In the example shown in the figure, the cuff joint portion 46 j is configured by a joint portion between the side sheet 43 and the skin surface sheet 41. The side sheet 43 and the skin surface sheet 41 can be joined by, for example, an adhesive such as a heat-fusion adhesive. In addition, although not shown, the front side of the front end edge of the pair of leak-proof cuffs 46 may include a cuff joint portion that cannot be joined to the skin surface side.

The leak-proof cuff 46 has a rising fulcrum 46a and a rising vertex 46b. The rising fulcrum 46a and the rising apex 46b extend in the front-rear direction L across the surrounding area S1 of the posterior condyle and across the surrounding area S2 of the posterior condyle. The standing fulcrum 46 a is a point that does not stand, and is equivalent to the base of the leak-proof cuff 46. In this embodiment, the standing fulcrum 46a is an edge line corresponding to the inner side in the width direction W among the joint portions of the side sheet 43 and the skin surface sheet 41. The rising apex 46b is a vertex corresponding to the leak-proof cuff 46 when the leak-proof cuff 46 stands up. That is, the rising apex 46 b is the free end of the leak-proof cuff 46.

The absorbent body 40 is an area outside the pair of leak-proof cuffs 46 in the width direction W, and may have a pair of wrinkles 48. A pair of folds 48 may extend from the frontal peri-condylar area S1 across the sacral peripheral area S2 in the front-rear direction L.

The pair of corrugations 48 may be formed of a fourth elastic member 49 attached to a sheet constituting the absorbent body 40. The fourth elastic member 49 may be, for example, one or a plurality of rubber threads. Instead of this, the fourth elastic member 49 may be, for example, an elastic sheet having elasticity. The fourth elastic member 49 is a sheet that is joined to the absorbent body 40 in a state of being stretched from a natural state. Accordingly, the fourth elastic member 49 acts to shrink the absorbent body 40 in the front-rear direction L, and can form a wrinkle.

(3) Structure of Absorbent Core Next, the structure of the absorbent core 51 will be described in detail. FIG. 4 is a plan view of the absorbent core 51 of the absorbent article 10.

The absorbent core 51 may have a pair of rear slits 56 on the both sides of the rear sacral region S2 on both sides that pinch the center in the width direction W. The absorbent core 51 may be provided between the pair of rear slits 56 and may have a central slit 59. The absorbent core 51 may be a pair of side slits 58 having both outer edges of the absorbent core 51 in the width direction W. Here, the slit is a region where the absorbent material constituting the absorbent core 51 is substantially zero.

The absorbent core 51 may have a pair of grooves 54 formed on both sides of the center of the absorbent article 10 in the width direction W. Here, the "groove" of the absorbent core 51 is a concept including both the recessed part formed in the absorbent material which comprises the absorbent core 51, or the area | region where the basis weight (weight per unit area) of an absorbent material is zero.

According to this aspect, the fold line FL of the subfemoral domain S3 in the narrow area CA of the absorbent core 51 and the pair of grooves 54 and the area on the front side are held by the feet of the wearer so as to face the width direction. The center in W is deformed by being crushed. That is, the absorbent core 51 is easily deformed inward in the width direction W so that the groove 54 is closed (refer to FIG. 5). Since the wearer's feet are often moved from a position on the front side more than the fold line FL during wearing, the wearer easily moves the feet.

Here, as described above, the narrowest portion LA having the shortest length of the absorbent core 51 in the width direction W in the narrow area CA may extend along the front-rear direction L. Further, it is preferable that the narrowest portion LA of the absorbent core 51 extends farther behind the fold line FL. As a result, the area in which the absorbent core 51 is easily crushed in the width direction is changed in length. Therefore, it is easier for the wearer to move the foot in a state where the absorbent core 51 is inserted during wearing.

The absorbent core 51 is a rear widened portion 54r that may have a pair of grooves 54 that are spaced apart from each other as they extend toward the rear. The front end edge 54s of the rear widened portion 54r may be located on the front side of the fold line FL and overlap the narrow area CA. More preferably, the front end edge 54s of the rear widened portion 54r may be located on the front side of the fold line FL and overlap the narrowest area LA of the narrow area CA. Here, the front end edge 54s of the rear widened portion 54r is oriented toward the rear from the area where the distance between the pair of grooves 54 in the subfemoral area S3 is the narrowest, and the distance between the pair of grooves 54 is Began to gradually widen.

Since the front end edge 54s of the rear widened portion 54r is located in the area overlapping the narrow area CA, the absorbent core 51 can be easily pressed inward in the width direction W by the pair of grooves 54 even in the rear portion of the narrow area CA. The width of the pair of grooves 54 may be widened toward the rear side, that is, the hip side of the wearer. Therefore, in the rear portion of the narrow area CA, that is, in the area where body fluids are mostly adhered, the absorbent core 51 is not easily crushed toward the inner side in the width direction, so the area of the absorbent core 51 in this area can be secured.

In addition, the length between the wearer's buttocks and feet's boundary line (meat split line) is expanded as they go from the wearer's thigh to the dorsal side. The front end edge 54s of the rear widened portion 54r is located more forward than the fold line FL, which can correspond to the increase in the length of the wearer's buttocks and feet's border line (meat split line) with each other. The width between each other is enlarged. Thereby, the area of the absorbent core 51 can be ensured on the buttocks side to easily fit the body shape of the wearer, and leakage of body fluid can be suppressed. From the viewpoint of easily moving the wearer's feet during wearing, the pair of grooves 54 can reach the rear side more than the fold line FL.

The rear edges of the pair of grooves 54 are preferably located within the range of the narrow area CA in the front-rear direction L. That is, the rear edges of the pair of grooves 54 are within the range of the narrow area CA, and the pair of grooves 54 do not extend to the rear side of the narrow area CA. Accordingly, in a region further behind the movable range of the wearer's foot, the absorbent core 51 is less likely to be crushed inward in the width direction, and the area of the absorbent core 51 is more easily secured.

In the example shown in the figure, the rear side edges of the pair of grooves 54 are located behind the narrowest portion LA of the absorbent core 51. That is, the rear side edges of the pair of grooves 54 are located in a region where the width of the absorbent core 51 is enlarged. Accordingly, the area in which the absorbent core 51 is less likely to be crushed toward the inner side in the width direction gradually expands toward the rear, thereby making it easier to secure the area of the absorbent core 51 from the fold line toward the rear.

The interval between the pair of grooves 54 in the substrand region S3 may be 1/4 or more of the maximum width of the absorbent core 51 in the width direction W. Thereby, the space | interval of a pair of groove 54 can be ensured. Accordingly, in the substrand region S3, the area of the absorbent core 51 can be maintained to a minimum between the pair of grooves 54.

The pair of grooves 54 are outside edges of the absorbent core 51 in the width direction W. More preferably, the outer edges of the pair of grooves 54 in the width direction W are located on the inner side in the width direction W than the narrowest portion LA of the absorbent core 51. This can prevent breakage of the absorbent core 51 caused by the pair of grooves 54, and can prevent adjacent absorbent cores 51 held by the grooves 54 from overlapping and deforming each other. Therefore, the absorbent core 51 has a curved shape that easily becomes a cup that holds a body fluid in the width direction W, and easily matches the shape of the body.

A pair of dotted lines IL extending a pair of grooves 54 rearward in a direction in which the pair of grooves 54 extend, that is, a direction in which the rear widened portion 54r extends, is wider in the width direction W than the cuff joint portion 46j. good. The dotted line IL is a line that is easy to form a wrinkle as a starting point for the absorbent core 51 to be crushed inward in the width direction W. That is, wrinkles of the absorbent core 51 are easily formed on the dotted line IL. The dotted line IL passes outside the cuff joint portion 46j in the width direction W. Therefore, the wrinkles of the absorbent core 51 are not easily formed in a region between the cuff joint portions 46j. Therefore, in the area of the rear ends of the pair of leak-proof cuffs 46, the absorbent core 51 is not easily crushed toward the inner side in the width direction in the entire area of the pair of leak-proof cuffs 46, and it becomes easy to secure the absorbent core. Area.

The absorbent core 51 preferably has a pair of grooves 54 that are spaced apart from each other by a forward widened portion 54f that expands toward the front. The distance between the pair of grooves 54 that is the starting point of the deformation of the absorbent core 51 is also enlarged on the ventral side, so that the area of the absorbent core can be easily secured on the ventral side, and leakage of body fluid can be more suppressed.

The front side edge of the pair of grooves 54 is located in the subfemoral area S3, but may not reach the surrounding area S1 of the anterior condyle. Preferably, the front side edges of the pair of grooves 54 are located in the narrow area CA of the absorbent core 51.

The absorbent core 51 may have a high rigidity HR. The high-rigidity region HR is a region provided on the rear side of the fold line FL and including the center in the width direction W. The high-rigidity area HR is configured by an area having higher rigidity than the area between the polyline FL and the high-rigidity area HR. Preferably, the high-rigidity area HR may be composed of an embossed area in which the absorbent core 51 is compressed in the thickness direction.

The length of the high-rigidity area HR in the front-rear direction L is longer than the length L1 from the fold line FL to the leading edge of the high-rigidity area HR. In the state where the absorbent article 10 is installed by the wearer, the substrand region S3 of the absorbent article, particularly near the center of the absorbent article 10 in the front-back direction L, is held between the wearer's feet And deformed so as to be crushed toward the center in the width direction W. Along with this deformation, a region further on the rear side than the center of the absorbent article 10 in the front-back direction L is also intended to be deformed toward the center of the width direction W. By this deformation, the wearer's feet become easy to move during wearing (see also Fig. 5). According to this aspect, the high-rigidity area HR having a longer length L1 from the fold line FL to the leading edge of the high-rigidity area HR in the front-rear direction L is provided at a center further in the width direction W than the fold line FL. field of. The high-rigidity area HR has higher rigidity than the area between the polyline FL and the high-rigidity area HR, and therefore it is difficult to deform toward the inside of the width direction W. Therefore, the absorbent core 51 is difficult to deform inward in the width direction W in the high-rigidity region HR and a region further behind it. Since it is difficult to crush the absorbent core 51 on the buttock side, it becomes easy to secure the area of the absorbent core 51 and leakage of body fluid can be suppressed.

The front edge of the high-rigidity HR is preferably at a position 5 to 15 mm further back than the fold line FL. The position of the fold line FL of the subfemoral area S3 is a position that is strongly held by the wearer's feet, and by making this position easy to deform inward, the wearer can easily move the feet during wearing. On the other hand, the area located behind 5-15 mm behind the fold line FL is the area facing the wearer's buttocks, and the area of the absorbent core 51 in this area can be suppressed even more. Leakage of body fluids.

Although at least a part of the high-rigidity area HR is preferably provided in all, it can be provided in an area overlapping with the narrow area CA as seen from the width direction W. Since the absorbent core 51 is narrow in a range where the wearer's feet can move, the wearer can easily move the feet. On the other hand, in the area further behind the fold line FL, the high-rigidity area HR is located in the area overlapping the narrow area CA as seen from the width direction W. Accordingly, as the absorbent core 51 deviates from the movable range of the wearer's foot toward the rear side, it becomes difficult to collapse in the width direction W. Therefore, the area of the absorbent core 51 can be more secured as it goes toward the rear. Since the rear of the absorbent core 51 is a portion facing the wearer's buttocks, the absorbent core 51 can be wider in the width direction W than the front part in order to cover the buttocks. In addition, although stool may adhere to the back of the absorbent core 51, stool will not be absorbed by the absorbent core 51. Therefore, in order to suppress the leakage of stool, it is preferable to secure the area of the absorbent core 51 as it goes toward the rear of the absorbent core 51.

It is preferable that at least a part of the high rigidity region HR is located on the rear side of the rear edge of the pair of grooves 54. The high-rigidity area HR is located on the rear side than a pair of grooves 54 that easily crush the absorbent core 51 toward the inner side in the width direction W, so it is compatible with the ease of movement of the wearer's foot in the lower part of the thigh, and secure The area of the absorbent core 51 in the hip side.

Further, the high-rigidity region HR is a region overlapping the pair of grooves 54 as seen from the width direction W, and it is more preferable to extend toward the rear side of the rear edge of the pair of grooves 54. That is, at least a part of the high-rigidity region HR overlaps with a pair of grooves 54 as seen from the width direction W. The area in which the folding line FL is formed in the inferior region S3 is a portion that is easily crushed in the widest direction W by a pair of grooves 54. The high-rigidity area HR is an area overlapping the pair of grooves 54 as viewed in the width direction W. The high-rigidity area HR is a portion that is more difficult to crush in the width direction W than the area in which the fold line FL is formed. Furthermore, since the rear end edge of the pair of grooves 54 in the high-rigidity area HR extends rearwardly, the pair of grooves 54 does not have the pair of grooves 54 and therefore becomes a portion that is difficult to crush in the width direction W. As described above, the absorbent core 51 gradually becomes difficult to crush in the width direction W as it goes from the position of the fold line FL of the subfemoral region S3 to the rear. As a result, the area of the absorbent core 51 can be more widely secured toward the rear.

The length of the high-rigidity region HR in the width direction W is shorter than the maximum length of the absorbent core 51 in the width direction W. As a result, the outer region of the high-rigidity region HR in the width direction is deformed circularly in accordance with the bending of the wearer's body. In other words, the absorbent core 51 is curved in a cup shape in the width direction. Accordingly, the absorbent core 51 has a shape that accommodates feces such as body fluids, and leakage of body fluids is further suppressed.

The high-rigidity region HR is preferably provided more inward than the outer edge of the absorbent core 51 in the width direction W, and more preferably provided more inward than the outer edge of the narrowest portion LA of the absorbent core 51. The area inside the narrow area CA in the width direction W is susceptible to receiving forces from both feet of the wearer toward the inside of the width direction W. The high-rigidity area HR is disposed more inward than the outer edge of the absorbent core 51 in the width direction W. Therefore, in the high-rigidity area HR, it is difficult for the absorbent core 51 to deform toward the inner side of the width direction W in the high-rigidity area HR. This makes it difficult for the absorbent core 51 to be crushed on the buttocks side, which makes it easy to secure the area of the absorbent core 51, and it is possible to suppress leakage of body fluids. Further, if the high-rigidity area HR is provided on the inner side than the outer edge of the width direction W of the absorbent core 51, the high-rigidity area HR is difficult to directly contact the wearer's feet, so that the wearer's strange feeling can be suppressed.

The high-rigidity region HR is more preferably a region provided between the pair of grooves 54 in the width direction W. In this case, a part of the high-rigidity region HR may be located in the pair of grooves 54. By providing the high rigidity area HR between the pair of grooves 54 which are the starting points for deforming the absorbent core 51, even if the absorbent core 51 is easily crushed in the width direction in the substrand area S3, the high rigidity area HR can be integrated The planarization ensures the area of the absorbent core 51 more.

The high-rigidity region HR is more preferably a pair of grooves 54 adjacent to each other in the width direction W. As a result, the area between the pair of grooves 54 can be flattened as a whole, and the area of the absorbent core 51 can be more ensured.

As described above, the high-rigidity field HR may be composed of an embossed field. Since the embossing field can be performed by embossing processing for pressing the absorbent core 51, it is possible to form a high-rigidity field HR without increasing the manufacturing cost of the absorbent article. In addition, the embossing area is an area in which the collapse of the absorbent core 51 is difficult, so it becomes easy to secure the area of the absorbent core 51.

The embossed area is preferably constituted by a plurality of embossed areas including dots recessed from the skin surface side to the non-skin surface side. When the embossing formed in the embossing area is recessed from the skin surface side to the non-skin surface side, the high-rigidity area HR is easily curved in a convex shape toward the non-skin surface side. Therefore, in the high-rigidity area HR, the area of the absorbent core 51 can be ensured, and the wearer's body can be gently convexly deformed toward the non-skin surface side according to the curvature of the wearer's body. Accordingly, the absorbent core 51 has a shape that can easily receive excreta such as body fluids, and leakage of body fluids is further suppressed.

In this embodiment, the numerical value of the “length” of each part of the absorbent article 10 refers to the absorbent article 10 without wrinkles (other than the fold line FL) of the absorbent article 10 that is unfolded and unlocked at the side. The article is measured in an extended state.

In addition, the rigidity of each part of the absorbent core 51 can be measured by a Galley stiffness measurement method prescribed by the standard JIS L-1096 (2010). For example, first, a test piece having a width of 25 mm and a length of 38 mm is taken from the absorbent core 51 to be measured. An adhesive tape was attached to one end of the test piece, that is, a place held by the disk of the Galley softness tester. Next, the lower end of the cymbal of the Galley softness tester was matched with the scale of the movable arm which matched the size of a test piece. Next, the adhesive tape of the test piece was put on the side and held by a pan. At this time, the length of the test piece applied to the pendulum of the Galley softness tester was 5 to 6 mm. Next, the weight and mounting position of the auxiliary weight are selected so that the memory of the Galley softness tester is between 3 and 6, and the auxiliary weight is mounted. After that, when the test piece is located on the left side of the pendulum, the switch that rotates to the left is pressed, and when it is located on the right, the switch that is rotated to the right is pressed to move the movable arm. Then, the scale at the moment when the swing lever of the pendulum moves away from the test piece is read. For each test piece, both right and left rotations of the pendulum were measured.

The stiffness of the test piece can be calculated by the following formula.
Rigidity (mN) = (25.4 × Wa + 50.8 × Wb + 101.6 × Wc) × (L × 25.4) 2 × 3.375 × 10-5 × (RGr + RGl) / (2 × d)
Here, Wa is the weight (g) of the weight installed at the uppermost mounting position, Wb is the weight (g) of the weight installed at the central mounting position, and Wc is installed at the bottom The weight of the weight in the installation position (g). L is the movable arm scale (inch). D is the width (mm) of the test piece. RGr is the memory value at the moment when the rotation lever of the clock pendulum is rotated right away from the test piece. RG1 is the memory value at the moment when the left lever of the pendulum is rotated away from the test piece. The rigidity obtained by the above measurement determines the rigidity of each part of the absorbent core 51.

Although the present invention has been described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be modified and changed without departing from the spirit and scope of the present invention determined by the description of the scope of patent application. Therefore, the descriptions in this specification are for the purpose of illustration only, and are not intended to limit the present invention in any way.

For example, in the above-mentioned embodiment, the absorbent body 40 is separately formed from the front palate peripheral member 20 and the back palate peripheral member 30. Instead of this, the absorptive main body 40 may be integrally formed with the front hip periphery member 20 and the rear hip periphery member 30.

Furthermore, in the above-mentioned embodiment, the absorbent article 10 is an underpants-type absorbent article having the side locking portion 60. Instead of this, the absorbent article 10 may be a belt-type absorbent article. In this case, the absorbent article 10 may not include the side locking portion 60, and may include a fastening band that detachably fixes the front hem circumference S1 and the rear hem circumference S2.

The entire contents of Japanese Patent Application No. 2017-254985 filed on December 28, 2017 are incorporated herein by reference.

[Industrial availability]

According to the above-mentioned embodiment, it is possible to provide an absorbent article which can ensure a space for accommodating the feces on the buttocks side during wearing.

10‧‧‧ Absorbent article

40‧‧‧ Absorptive body

50‧‧‧ Absorber

51‧‧‧ Absorbent core

54‧‧‧ trench

54f‧‧‧Front widening section

54r‧‧‧Rear widened section

54s‧‧‧front edge

56‧‧‧back slit

58‧‧‧side slit

59‧‧‧ Central slit

CA‧‧‧Narrow area

FL‧‧‧ Polyline

HR‧‧‧High rigidity

IL‧‧‧ dotted line

L‧‧‧ forward and backward

LA‧‧‧Narrowest part

L1‧‧‧ length

S1‧‧‧Area around the front

S2‧‧‧Houyi surrounding area

S3‧‧‧ shares under domain

T‧‧‧thickness direction

W‧‧‧Width direction

[FIG. 1] A schematic view of an absorbent article according to an embodiment.

[Fig. 2] A developed plan view of an absorbent article according to an embodiment.

[Fig. 3] A cross-sectional view of the absorbent article taken along the line A-A in Fig. 2.

[Fig. 4] A plan view of an absorbent core of an absorbent article.

[Fig. 5] A schematic view of an absorbent core that receives a force inward in the width direction in the lower thigh area.

Claims (15)

An absorbent article having: Forward and backward directions, and Width direction perpendicular to the front-back direction, and Frontal area, and Houyi surrounding area, and A sub-strand domain disposed between the aforementioned anterior region and the posterior region, and At least the absorbent core located in the aforementioned substrand domain, The folding line for folding the absorbent article in half extends in the width direction in the lower strand area, The absorbent core has a narrow area that shrinks at least in the widthwise direction toward the inner side in the width direction, and a pair of grooves formed on both sides of the center of the absorbent article in the width direction, The narrow area extends from the fold line to the front-back direction, The absorbent core has a rear widened portion that expands as the interval between the pair of grooves toward the rear faces, The front edge of the rear widened portion is an area located more forward than the fold line and overlapping the narrow area. For example, if the absorbent article in the scope of patent application is No. 1, The rear side edges of the pair of grooves are located within the range of the narrow area in the front-rear direction. If the absorbent article in the scope of patent application No. 1 or 2, The pair of grooves is less than the outer edge of the absorbent core in the width direction. If the absorbent article in the scope of patent application No. 1 or 2, The absorbent core is the narrowest portion having the shortest length of the absorbent core in the width direction in the narrow area, The narrowest portion of the absorbent core extends in the front-rear direction. For example, if the absorbent article in the scope of patent application No. 4 is applied, The narrowest portion of the absorbent core extends farther back than the fold line. If the absorbent article in the scope of patent application No. 1 or 2, The pair of grooves has a front widened portion that expands as the interval between the pair of grooves faces forward. If the absorbent article in the scope of patent application No. 1 or 2, The interval between the pair of grooves in the substrand region is equal to or greater than 1/4 of the maximum width of the absorbent core in the width direction. If the absorbent article in the scope of patent application No. 1 or 2, The absorbent core is the narrowest portion having the shortest length of the absorbent core in the width direction in the narrow area, The outer edges of the pair of grooves in the width direction are located more inward than the narrowest portion of the absorbent core. If the absorbent article in the scope of patent application No. 1 or 2, A leak-proof cuff extending in the front-rear direction is a pair of leak-proof cuffs arranged on both sides that hold the center in the width direction, The rear side of the rear edge of the pair of leak-proof cuffs has a cuff joint portion that cannot be erected to the skin surface side, A pair of dashed lines that extend the pair of grooves in the direction in which the pair of grooves extend rearwardly pass through the outer side of the cuff joint portion in the width direction. If the absorbent article in the scope of patent application No. 1 or 2, The high-rigidity area is an area provided on the rear side of the fold line and including the center in the width direction. The high-rigidity field is constituted by a field having a higher rigidity than a field between the polyline and the high-rigidity field. The length of the highly rigid area in the front-rear direction is longer than the length from the fold line to the leading edge of the highly rigid area. For example, the absorbent article under the scope of patent application No. 10, wherein: At least a part of the high-rigidity region is located more rearward than the rear end edges of the pair of grooves. For example, the absorbent article under the scope of patent application No. 10, wherein: The high-rigidity region is a region overlapping the grooves of the pair, as viewed from the width direction, and extends toward the rear side of the rear edge of the grooves of the pair. For example, the absorbent article under the scope of patent application No. 10, wherein: The high rigidity area is an area provided between the pair of grooves in the width direction. For example, the absorbent article under the scope of patent application No. 10, wherein: The high rigidity area is adjacent to the pair of grooves in the width direction. For example, the absorbent article under the scope of patent application No. 10, wherein: The high-rigidity area is provided in an area overlapping the narrow area as seen from the width direction.