TWI782164B - absorbent articles - Google Patents

Abstract

To provide an absorbent article capable of securing a space for receiving feces from the buttocks side during wearing. An absorbent article (10) comprising: a front-rear direction, and a width direction perpendicular to the front-rear direction; An under-thigh domain (S3) between the domains, and an absorbent core (51) disposed at least in the under-thigh domain. The fold line (FL) for folding the absorbent article in half extends along the width direction in the lower thigh area. The absorbent core has a narrow region (CA) narrowed inward 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. Narrow areas are concerned with polylines extending in the front-to-back direction. The absorbent core has a rear widening portion (54r) that expands as the distance between the pair of grooves goes rearward. The front edge (54s) of the rear widening portion is a region located on the front side of the folding line and overlapping with the narrow region.

Description

absorbent article

The present invention relates to absorbent articles such as disposable diapers, for example.

The absorbent article of disposable diapers such as Patent Document 1 has: a region around the front part of the wearer (abdominal part) arranged around the front part of the wearer; and a region around the back part of the wearer. The region around the hindquarters (dorsal portion), and the lower thigh region arranged under the wearer's thighs. The absorbent core for absorbing body fluids of the wearer extends from the area around the forequarters across the area around the hindquarters.

In the absorbent article cited in Citation 1, the absorbent core has a pair of non-fiber-stacking portions extending in the front-back direction of the absorbent article. The pair of non-fiber-piling portions are positioned symmetrically with respect to a center line extending in the front-back direction passing through the center of the absorbent article in the width direction. The non-fibering portion extends from the area around the front body across the area around the rear body in the front-rear direction. The non-fiber-piled portion is composed of through holes in which the core forming material constituting the absorbent core does not exist at all. [Prior Art Literature] [Patent Document]

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

The inventor of this case, as a result of intensive research, found the following problems. That is, in the state where the wearer wears the absorbent article, the lower thigh area of the absorbent article, especially the vicinity of the center of the absorbent article in the front-rear direction, is held between the wearer's feet, and Deformed so as to be crushed toward the center in the width direction. Accompanied by this deformation, the rear region also tends to deform toward the center of the width direction rather than the center of the absorbent article in the front-rear direction. However, if the rear region is deformed so as to be crushed toward the center of the width direction rather than the center of the absorbent article in the front-rear direction, it will be difficult to secure a space (area of the absorbent core) for storing stool on the buttocks side, and it will be easy. cause leakage of stool.

Therefore, an absorbent article capable of securing a space for accommodating feces on the buttock side during wearing is desired.

An absorbent article of one aspect has: a front-rear direction, a width direction perpendicular to the front-rear direction, a region around a front body, and a region around a rear body, and is arranged in the region around the front body and the rear body. An infarm domain between the surrounding domains, and an absorbent core disposed at least in the aforesaid inferior domain. The folding line for folding the absorbent article in half extends along the width direction in the lower thigh region. The absorbent core has at least a narrow region narrowed inward in the width direction in the undergroin region, and a pair of grooves formed on both sides with respect to the center of the absorbent article in the width direction. The aforementioned narrow area extends toward the aforementioned front-rear direction with respect to the aforementioned fold line. The said absorbent core has the rear widening part which expands as the space|interval between the said pair of groove|channels goes back. The front end edge of the rear widening portion is a region located on the front side of the folding line and overlapping with the narrow region.

(1) Outline of the embodiment At least the following matters will become apparent from the description in this manual and attached drawings.

An absorbent article of one aspect has: a front-rear direction, a width direction perpendicular to the front-rear direction, a region around a front body, and a region around a rear body, and is arranged in the region around the front body and the rear body. In the absorbent article in the lower thigh region between the surrounding regions and the absorbent core provided at least in the lower thigh region, the fold line for folding the absorbent article in half extends in the lower thigh region along the width direction, and the absorbent core is It has a narrow area narrowed toward the inner side in the width direction at least in the undergrown region, and a pair of grooves formed on both sides of the center of the absorbent article in the width direction, the narrow area being for the fold line Extending in the front-rear direction, the absorbent core has a rear widened portion that expands as the distance between the pair of grooves moves toward the rear, and the front end edge of the rear widened portion is located on the front side of the fold line. and areas that overlap with the aforementioned narrow areas.

According to this aspect, the crease line of the lower thigh area and the area on the front side thereof are easy to be absorbed toward the center of the width direction by the narrow area of the absorbent core and a pair of grooves by being pinched by the wearer's feet. Deforms in a crushing manner, even if the groove is deformed closed. During wearing, the wearer's feet are often moved at a position corresponding to the front side of the fold line, so the wearer can easily move the feet.

In addition, the pair of grooves has a rear widening portion that expands as the distance between the pair of grooves moves toward the rear, and the front end edge of the rear widening portion is a region that is located on the front side of the fold line and overlaps with the narrow region. . Since the front end edge of the rear widened part is located in the area overlapping the narrow area, the absorbent core can be easily crushed inward in the width direction by a pair of grooves in the rear part of the narrow area, and can be easily crushed inward in the direction of the narrow area. The width between the pair of grooves is gradually widened on the hip side of the wearer. Thereby, it is possible to secure a space for accommodating feces in the rear portion of the narrow area, that is, the area where the feces are attached.

And the length between the junction line (meat splitting line) of the wearer's buttocks and feet expands from the wearer's buttocks toward the back side. Since the front end edge of the rear widened part is located on the front side of the fold line, it can correspond to the increase in the length of the junction line (meat split line) between the wearer's buttocks and feet, and the gap between the pair of grooves can be adjusted. The width is expanded. Thereby, a space for accommodating feces can be easily ensured on the buttock side in accordance with the body shape of the wearer, and leakage of bodily fluids can be suppressed.

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

That is, the rear side edges of the pair of grooves are located within the range of the narrow region, and the pair of grooves do not extend to the rear side beyond the narrow region. Thereby, in the region behind the movable range of the wearer's feet, the absorbent core is less likely to be crushed inward in the width direction, and a space for storing feces can be more easily secured.

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

Thereby, the splitting of the absorbent core by a pair of groove|channel can be prevented, and the deformation|transformation of the adjacent absorbent core which pinches|interposes a groove|channel can be suppressed. Accordingly, the absorbent core has a cup shape that is easy to hold bodily fluids in the width direction, and a curved shape that fits the shape of the body.

According to a preferred aspect, the absorbent core has a narrowest portion where the length of the absorbent core in the width direction is the shortest in the narrow region, and the narrowest portion of the absorbent core is along the front and back sides. direction extension.

According to this aspect, since the narrowest part of the absorbent core extends along the front-rear direction, the area where the absorbent core is easily crushed in the width direction becomes longer. This makes it easier for the wearer to move his or her feet while wearing the absorbent core.

According to a preferable aspect, the said narrowest part of the said absorbent core is extended beyond the said fold line to the rear.

According to this aspect, since the narrowest part of the absorbent core extends beyond the fold line, the region where the absorbent core is easily crushed in the width direction extends to the rear. Thereby, the wearer can easily move the foot further to the rear side.

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

Since the distance between the pair of grooves which are the starting points of deformation of the absorbent core 51 is also wide on the abdominal side, it is easy to secure an area for absorbing bodily fluids on the abdominal side, and the leakage of bodily fluids can be further suppressed.

According to a preferred aspect, the distance between the pair of grooves in the under thigh region is 1/4 or more of the maximum width of the absorbent core in the width direction.

According to this aspect, since the pair of grooves has a certain width at intervals, it is possible to secure a wide area between the pair of grooves. Thereby, the area of an absorbent core can be maintained between a pair of groove|channel.

According to a preferred aspect, the absorbent core has the narrowest portion in the narrow region where the length of the absorbent core in the width direction is the shortest, and the outer edges of the pair of grooves in the width direction, It is located on the inside of the narrowest part of the absorbent core.

Thereby, the splitting of an absorbent core by a pair of groove|channel can be suppressed, and the deformation|transformation of the adjacent absorbent core which pinches|interposes a groove|channel can be suppressed. Accordingly, the absorbent core has a cup shape that is easy to hold bodily fluids in the width direction, and a curved shape that fits the shape of the body.

According to a preferred aspect, there are leak-proof cuffs extending in the front-rear direction, which are a pair of leak-proof cuffs arranged on both sides sandwiching the center in the width direction, and the pair of leak-proof cuffs The rear side of the rear end edge has a cuff joint portion that cannot stand upright towards the skin side, and a pair of dotted lines that extend the aforementioned pair of grooves toward the rear in the direction in which the aforementioned pair of grooves extend are in the aforementioned The width direction passes outside the aforementioned cuff joint.

A pair of dotted lines that extend the pair of grooves rearward in the direction in which the pair of grooves extend are lines that form a starting point of wrinkles that are likely to form when the absorbent core is crushed inward in the width direction. Since this line passes outside the cuff junction in the width direction, the area of the absorbent core can be ensured in the entire area between the pair of leak-proof cuffs in the back region.

According to a preferred aspect, the high-rigidity region is a region located on the rear side of the fold line and includes the center in the width direction, and the high-rigidity region is formed by having a rigidity ratio higher than that between the fold line and the high-rigidity region. The length of the high rigidity region in the front-rear direction is longer than the length from the folding line to the front edge of the high rigidity region.

Since the high-rigidity region has higher rigidity than the region between the fold line and the high-rigidity region, it is difficult to deform inwardly in the width direction. Therefore, the absorbent core is hard to deform inwardly in the width direction in the highly rigid region and the region further behind. Thereby, it becomes easy to ensure the space which accommodates feces on the buttocks side, and the leakage of bodily fluid can be suppressed.

According to a preferred aspect, at least a part of the high rigidity region is located on the rear side of the rear edge of the pair of grooves.

Since the high rigidity area is located on the rear side of a pair of grooves that tend to crush the absorbent core inward in the width direction, it is compatible with: the ease of movement of the wearer's feet in the thighs, and the absorption in the buttocks The area of the core is secured.

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

The region where the crease line is formed in the lower femoral region is a part that is easy to be crushed in the widest direction by means of a pair of grooves. The high-rigidity region is a region that overlaps with the pair of grooves as seen from the width direction, and is a portion that is difficult to crush from the region where the crease line is formed to the width direction due to the high-rigidity region. Furthermore, since there is no pair of grooves in the portion extending to the rear side beyond the rear edge of the pair of grooves in the high-rigidity region, it becomes a portion that is difficult to crush in the width direction. In this way, the absorbent core becomes difficult to be crushed in the width direction as it goes backward from the position of the crease line in the lower thigh area. Thereby, the area of an absorbent core can be ensured further toward the back.

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

By providing a high rigidity region between a pair of grooves that make the absorbent core a deformation starting point, the entire high rigidity region can be flattened and the area of the absorbent core can be further secured.

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

Since the high-rigidity region is adjacent to the pair of grooves, the entire region between the pair of grooves can be flattened, and the area of the absorbent core can be further secured.

According to a preferred aspect, the high-rigidity region is provided in a region that overlaps with the narrow region when viewed from the width direction.

In the area on the rear side of the folding line, the high rigidity area is provided so as to overlap the narrow area when viewed from the width direction. As a result, the absorbent core is less likely to be crushed in the width direction as it deviates from the movable range of the wearer's feet toward the rear side. Therefore, the area of the absorbent core can be ensured more toward the rear.

(2) Composition of absorbent articles Hereinafter, absorbent articles according to Examples will be described with reference to the drawings. In addition, in the following description of the drawings, the same or similar symbols are attached to the same or similar parts. However, the drawing is only a schematic one, and it should be noted that the ratio of each dimension and the like are different from the actual one. Therefore, specific dimensions and the like should be judged in consideration of the following description. In addition, a portion in which the relationship and ratio of mutual dimensions are different is also included between the drawings.

Fig. 1 is a schematic diagram 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 in which the absorbent article is stretched in the expanded state in which the side lock portions described later are expanded until the absorbent article has no wrinkles. Fig. 3 is a sectional view of the absorbent article taken along 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-rear direction L and a width direction W perpendicularly intersecting each other in an unfolded state. The front-rear direction L is constituted by a direction extending toward the front side of the body (ventral side) and the back side of the body (dorsal side). In other words, the front-back direction L is a direction extending front-back in the expanded absorbent article 10 . In addition, the absorbent article 10 is a thickness direction T having both the front-back direction L and the width direction W perpendicularly intersecting each other.

The absorbent article 10 has a region around the front body S1 , a region around the rear body S2 , and a lower thigh region S3 . The area around the front body S1 is an area facing the area around the front body of the wearer. The area around the hindquarters S2 is an area facing the area around the hindquarters of the wearer. The lower thigh region S3 is a region located under the wearer's thigh and arranged between the forequarter surrounding region S1 and the hindquarter surrounding region S2.

In this embodiment, the absorbent article 10 may have a front body surrounding member 20 , a rear body surrounding member 30 , and an absorbent main body 40 . The front body surrounding member 20 is arranged in the front body surrounding area S1. The rear circumference member 30 is arranged in the rear circumference area S2. The front body surrounding member 20 and the rear body surrounding member 30 may be composed of, for example, a nonwoven sheet.

The front body surrounding member 20 may have, for example, a double-layered non-skin side sheet and a double-layered cover sheet 70 . In the aspect shown in FIG. 4, the non-skin surface side sheet and the cover sheet 70 are constituted by an integral sheet. Specifically, the cover sheet 70 is formed by folding (folding back) the non-skin surface side sheet from the front end edge of the front body peripheral region S1. Alternatively, the non-skin surface side sheet and the cover sheet 70 may be composed of separate sheets.

In the aspect shown in FIG. 2 , the first elastic member 71 extending in the width direction W is provided near the rear edge 70e of the cover sheet 70 . In addition, the cover sheet 70 may be joined to the absorbent main body 40 on the front side of the first elastic member 71 by a joining member 74 such as heat fusion adhesive.

The fold line FL dividing the absorbent article 10 into two front and back may pass through the lower thigh area S3. The fold line FL extends along the width direction W. As shown in FIG. That is, in the state shown in FIG. 1 , the absorbent article 10 is folded in half at the base point on the fold line FL extending along the width direction W.

The side locking portion 60 may be provided at an end portion of the front body surrounding area S1 in the width direction W and an end portion of the rear body surrounding area S2 in the width direction W. The side locking portion 60 is constituted by locking the end of the front body surrounding area S1 in the width direction W and the end of the rear body surrounding area S2 in the width direction W to each other.

The end portion of the front body peripheral region S1 in the width direction W and the end portion of the rear body peripheral region S2 in the width direction W are locked by the side locking portion 60, and are placed on the absorbent article. In Fig. 10, a trunk peripheral opening 62 through which the wearer's trunk penetrates, and a pair of foot peripheral openings 66 into which the wearer's feet are respectively inserted are formed. The trunk periphery opening edge 64 forming the trunk periphery opening 62 can be constituted by the front end edge of the front trunk periphery member 20 and the rear end edge of the rear trunk periphery member 30 . And, the foot circumference opening edge 68 forming the foot circumference opening portion 66 can be formed by: the side edge 401 of the absorbent main body 40 extending in the front-rear direction L; The side 30l located on the front side of the rear body surrounding member 30 is formed.

Here, FIG. 2 shows a state in which the locking of the side locking portion 60 is released and the absorbent article 10 is unfolded. The side locking portion 60 can extend along the front-rear direction L in the front body surrounding member 20 and the rear body surrounding member 30 , respectively. In this case, the boundary between the front body surrounding area S1 and the thigh lower area S3 may be formed by the rear end edge of the side locking portion 60 provided on the front body surrounding member 20 . Similarly, the boundary between the hindquarter surrounding area S2 and the thigh lower area S3 can be formed by the front end edge of the side locking part 60 provided on the hindquarter surrounding member 30 .

One or a plurality of elastic members 32 that can expand and contract in the width direction W may be provided in the rear body area S2. Instead of this, the elastic member 32 in the rear circumference region S2 may be formed of a stretchable sheet that can expand and contract in the width direction W.

In addition, one or a plurality of second elastic members 22 that can expand and contract in the width direction W may be provided in the front body peripheral region S1. The second elastic member 22 is composed of elastic threads. The second elastic member 22 may be provided on the non-skin side of the absorptive main body 40 in the front body peripheral region S1. Furthermore, an elastic sheet 90 that can expand and contract in the width direction W may be provided in the front body peripheral region S1. The stretch sheet 90 can be provided in a region where it does not overlap the second elastic member 22 in the thickness direction T. As shown in FIG.

The absorbent body 40 is arranged across the front body surrounding member 20 and the rear body surrounding member 30 . That is, the absorbent main body 40 extends across the front body area S1 , the rear area area S2 , and the thigh area S3 .

The absorbent body 40 may be formed separately from the front body surrounding member 20 and the rear body surrounding member 30 . In this case, the absorbent main body 40 can be joined to the front body surrounding member 20 and the rear body surrounding member 30 in the front body surrounding area S1 and the rear body surrounding area S2, respectively.

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

The skin surface sheet 41 can be made of, for example, a liquid-permeable sheet such as non-woven fabric or 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 laminated.

The non-skin surface sheet 42 may include a liquid-impermeable sheet. The liquid-impermeable sheet can be composed 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. Alternatively, the non-skin surface sheet 42 may be formed of a laminated sheet in which a plurality of sheets are laminated. 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, ground pulp or superabsorbent polymer (SAP), or a mixture thereof. The core wrap 52 can be made of tissue paper or non-woven fabric, for example.

The absorbent core 51 is arranged at least in the lower thigh region S3. Preferably, the absorbent core 51 can extend from the front body surrounding area S1 across the rear body surrounding area S2 in the front-back direction L.

The absorbent core 51 has a narrow region CA capable of shrinking inward in the width direction W at least in the thigh lower region S3. The narrow area CA can extend in the front-back direction L with respect to the fold line FL. The narrowest part LA of the absorbent core 51 in the width direction W may be provided in the crotch area S3. In addition, the narrowest part of the absorbent core 51 may extend along the front-back direction L. In this case, the fold line FL can pass through the narrow region CA of the absorbent core 51 .

The absorbent main body 40 may have side sheets 43 covering both sides of the skin surface sheet 41 in the width direction W. The side sheets 43 can be made of thin sheets such as non-woven fabrics or perforated plastic films, for example.

The absorbent body 40 may have a pair of leak-proof cuffs 46 . The pair of leak-proof cuffs 46 extend in the front-rear direction L between the front circumference region S1 and the rear circumference region S2, and are arranged on both sides so as to sandwich the center of the absorbent article 10 in the width direction W. The pair of anti-leakage cuffs 46 is constituted by the erectable portion (the portion of the range B in FIG. 2 ) which can be erected toward the wearer's skin.

The anti-leakage cuff 46 may be composed of 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 stretchable in the front-rear direction. The third elastic member 47 may include one or a plurality of rubber threads. Specifically, in one example, the inner portion of the side sheet 43 in the width direction W is folded (folded back) outward, and the third elastic member 47 is disposed on the folded (folded) portion of the side sheet 43 . Furthermore, the inner edge of the side sheet 43 in the width direction W is not joined to the skin surface sheet 41 , but constitutes a free end that can stand up from the skin surface sheet 41 .

The rear side of the rear edge of the pair of anti-leakage cuffs 46 has a cuff joining portion 46j joined so as not to stand up toward the skin surface side. In the illustrated example, the cuff joint portion 46j is constituted by a joint portion between the side sheet 43 and the skin surface sheet 41 . Also, the side sheet 43 and the skin surface sheet 41 can be bonded, for example, by an adhesive such as a heat fusion adhesive. Also, although not shown, the pair of anti-leakage cuffs 46 may have a cuff joining portion that is joined so as not to stand up toward the skin surface side on the front side of the front end edge.

The leak-proof cuff 46 has an erected fulcrum 46a and an erected apex 46b. The upright fulcrum 46a and the upright apex 46b extend in the front-rear direction L from the fore-section surrounding area S1 across the rear-section surrounding area S2. Standing fulcrum 46a is a point that does not stand up, and is equivalent to the base of leak-proof cuff 46 . In the present embodiment, the standing fulcrum 46 a corresponds to an inner edge in the width direction W of the junction of the side sheet 43 and the skin surface sheet 41 . The erected apex 46b corresponds to the apex of the leak-proof cuff 46 when the leak-proof cuff 46 is erected. That is, the standing apex 46b is a free end of the leak-proof cuff 46 .

The absorbent main body 40 is an area outside the pair of leak-proof cuffs 46 in the width direction W, and may have a pair of gathers 48 . The pair of gathers 48 may extend in the front-rear direction L from the fore body area S1 across the hind body area S2.

The pair of gathers 48 may be constituted by a fourth elastic member 49 attached to a sheet constituting the absorbent main body 40 . The fourth elastic member 49 may be, for example, one or a plurality of rubber threads. Alternatively, the fourth elastic member 49 may be, for example, a stretchable elastic sheet. The fourth elastic member 49 is joined to the sheet constituting the absorbent body 40 in a stretched state from its natural state. Accordingly, the fourth elastic member 49 acts to shrink the absorptive main body 40 in the front-rear direction L to form gathers.

(3) Composition of absorbent core Next, the configuration 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 side slits 56 located on both sides sandwiching the center in the width direction W in the rear body peripheral region S2. In addition, the absorbent core 51 may have a central slit 59 between the pair of rear slits 56 . In addition, the absorbent core 51 may have a pair of side slits 58 located on 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 with respect to 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 a recess formed in the absorbent material constituting the absorbent core 51 and a region where the basis weight (basis weight) of the absorbent material is zero.

According to this aspect, the narrow area CA of the absorbent core 51 and the fold line FL of the crotch area S3 in the pair of grooves 54 and the area on the front side are pinched by the wearer's feet so as to face the width direction. The center of the W is deformed in a way that it is crushed. That is, the absorbent core 51 is easily deformed inward in the width direction W so as to close the groove 54 (see FIG. 5 ). During wearing, the wearer's feet are often moved from a position corresponding to the front side of the fold line FL, so the wearer can easily move the feet.

Here, the narrowest part LA in which the length of the absorbent core 51 is the shortest in the width direction W in the narrow region CA may extend along the front-back direction L as described above. Furthermore, it is preferable that the narrowest part LA of the absorbent core 51 is extended to the back rather than the folding line FL. Accordingly, the region where the absorbent core 51 is easily crushed in the width direction becomes longer. Therefore, it becomes easier for the wearer to move the foot while wearing the absorbent core 51 in the state.

The absorbent core 51 may have a rear widening part 54r in which the distance between a pair of grooves 54 is enlarged as it goes rearward. The front end edge 54s of the rear widening portion 54r may be located on the front side of the fold line FL and overlaps the narrow area CA. More preferably, the front end edge 54s of the rear widening portion 54r may be located on the front side of the fold line FL and overlap the narrowest portion LA of the narrow area CA. Here, the front end edge 54s of the rear widened portion 54r is directed backward from the region where the distance between the pair of grooves 54 in the subgromor region S3 is the narrowest, and the distance between the pair of grooves 54 is narrowest. It is composed of points that start to get wider.

Since the front end edge 54s of the rear widening portion 54r is located in a region overlapping the narrow region CA, the absorbent core 51 is easily pressed inward in the width direction W by the pair of grooves 54 even in the rear portion of the narrow region CA. The width between the pair of grooves 54 may also be widened toward the rear side, that is, the wearer's buttocks side. Therefore, since the absorbent core 51 is less likely to be crushed inward in the width direction in the rear part of the narrow area CA, that is, the area where much body fluid adheres, the area of the absorbent core 51 in this area can be secured.

And the length between the junction line (meat splitting line) of the wearer's buttocks and feet expands from the wearer's buttocks toward the back side. The front end edge 54s of the rear widened portion 54r is located on the front side of the fold line FL, and the pair of grooves 54 can be formed corresponding to the increase in the length of the boundary line (meat split line) between the wearer's buttocks and feet. The width between them expands. Thereby, the area of the absorbent core 51 can easily be ensured on the buttock side according to the body shape of the wearer, and leakage of bodily fluids can be suppressed. From the viewpoint of easy movement of the wearer's feet during wearing, the pair of grooves 54 can reach the rear side of the fold line FL.

Furthermore, it is preferable that the rear side edges of the pair of grooves 54 are located within the range of the narrow area CA in the front-rear direction L. As shown in FIG. That is, the rear side edges of the pair of grooves 54 are located 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. Thereby, in the region behind the movable range of the wearer's feet, the absorbent core 51 is less likely to be crushed inward in the width direction, and the area of the absorbent core 51 can be more easily secured.

In the illustrated example, the rear side edges of the pair of grooves 54 are located behind the narrowest part LA of the absorbent core 51 . That is, the rear side edges of the pair of grooves 54 are located in the area where the width of the absorbent core 51 expands. Thereby, since the area which makes the absorbent core 51 hard to be crushed inward in the width direction gradually expands toward the rear, it becomes easy to secure the area of the absorbent core 51 as it goes rearward from a fold line.

The distance between the pair of grooves 54 in the crotch area 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 between a pair of groove|channel 54 can be ensured. Thereby, also in the crotch area S3, the area of the absorbent core 51 can be maintained at the minimum between a pair of groove|channel 54 mutually.

The pair of grooves 54 do not reach the outer edge of the absorbent core 51 in the width direction W. As shown in FIG. 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 part LA of the absorbent core 51 . Thereby, the splitting of the absorbent core 51 by a pair of groove|channel 54 can be prevented, and the deformation|transformation of the adjacent absorbent core 51 pinched|interposed by the groove|channel 54 mutually overlapping can be suppressed. Therefore, in the width direction W, the absorbent core 51 has a cup shape that is easy to hold bodily fluids, and has a curved shape that is easy to match the shape of the body.

A pair of imaginary lines IL extending the pair of grooves 54 rearward in the direction in which the pair of grooves 54 extend, that is, in the direction in which the rear widened portion 54r extends, pass through the outer side of the cuff joining portion 46j in the width direction W. good. This dotted line IL is a line where wrinkles are likely to be formed as a starting point where the absorbent core 51 is crushed inwardly in the width direction W. As shown in FIG. That is, on this imaginary line IL, the gathers of the absorbent core 51 are easy to form. Since the dotted line IL passes outside the cuff joints 46j in the width direction W, the gathers of the absorbent core 51 are less likely to be formed in the area between the cuff joints 46j. Therefore, in the region of the rear end portion of the pair of leak-proof cuffs 46, the absorbent core 51 is less likely to be crushed inward in the width direction in the entire region between the pair of leak-proof cuffs 46, and it is easy to secure the absorbent core. area.

The absorbent core 51 preferably has a front widening portion 54f in which the distance between a pair of grooves 54 is widened toward the front. Since the distance between the pair of grooves 54 which are deformation starting points of the absorbent core 51 is also enlarged on the ventral side, an area of the absorbent core can be easily secured on the ventral side, and leakage of bodily fluids can be further suppressed.

The front side edges of the pair of grooves 54 are located in the lower femur region S3, and may not reach the front trunk peripheral region S1. Preferably, the front side edges of the pair of grooves 54 are located within the narrow area CA of the absorbent core 51 .

The absorbent core 51 may have a high rigidity region HR. The high rigidity region HR is a region provided behind the fold line FL and including the center in the width direction W. As shown in FIG. The high-rigidity region HR is constituted by a region having a higher rigidity than the region between the broken line FL and the high-rigidity region HR. Preferably, the high rigidity region HR may be constituted by an embossed region in which the absorbent core 51 is compressed in the thickness direction.

The length of the highly rigid region HR in the front-rear direction L is preferably longer than the length L1 from the fold line FL to the leading edge of the highly rigid region HR. In the state where the wearer wears the absorbent article 10, the lower crotch area S3 of the absorbent article, especially the vicinity of the center of the absorbent article 10 in the front-back direction L, is held between the wearer's feet. , and is deformed in such a manner that it is crushed toward the center in the width direction W. With this deformation, the region on the rear side from the center of the absorbent article 10 in the front-rear direction L also tends to deform toward the center in the width direction W. By this deformation, the wearer's feet become easy to move during wearing (also refer to FIG. 5). According to this aspect, the high-rigidity region HR, which is longer than the length L1 from the fold line FL to the front edge of the high-rigidity region HR in the front-rear direction L, is provided on the rear side of the fold line FL and includes the center in the width direction W. field of. Since the high-rigidity region HR has higher rigidity than the region between the fold line FL and the high-rigidity region HR, it is difficult to deform toward the inner side in the width direction W. Therefore, the absorbent core 51 becomes difficult to deform inward in the width direction W in the high rigidity region HR and the region behind it. Since the absorbent core 51 is hard to be crushed on the buttock side, it becomes easy to ensure the area of the absorbent core 51, and the leakage of bodily fluid can be suppressed.

The front edge of the high-rigidity region HR is preferably positioned 5 to 15 mm behind the fold line FL. The position of the fold line FL of the lower femur region S3 is a position where the wearer's feet are strongly pinched, and by making this position easy to deform inwardly, it becomes easy for the wearer to move the feet during wearing. On the other hand, the region located 5 to 15 mm behind the fold line FL is a region facing the wearer's buttocks, and by securing the area of the absorbent core 51 in this region, it is possible to further suppress the Leakage of bodily fluids.

At least a part of the high-rigidity region HR is preferably provided in the entirety, but it may be provided in a region overlapping with the narrow region CA when viewed from the width direction W. Since the absorbent core 51 is narrow in the movable range of the wearer's foot, the wearer can easily move the foot. On the other hand, in the region on the rear side of the fold line FL, the high rigidity region HR is a region provided to overlap with the narrow region CA as seen from the width direction W. As a result, the absorbent core 51 is less likely to be crushed in the width direction W as it deviates from the movable range of the wearer's feet toward the rear side. Therefore, the area of the absorbent core 51 can be ensured further toward the rear. Since the rear of the absorbent core 51 is a part facing the wearer's buttocks, the absorbent core 51 may be wider in the width direction W than the front part in order to cover the buttocks. In addition, although stools adhere to the rear of the absorbent core 51 , the stools are not absorbed by the absorbent core 51 . Therefore, in order to suppress the leakage of feces, it is preferable to secure the area of the absorbent core 51 more toward the rear of the absorbent core 51 .

At least a part of the high-rigidity region HR is preferably located on the rear side of the rear edge of the pair of grooves 54 . Since the high rigidity region HR is located on the rear side of the pair of grooves 54 that easily crush the absorbent core 51 inwardly in the width direction W, it is compatible with the ease of movement of the wearer's feet in the thighs and ensuring The area of the absorbent core 51 in the buttock side.

Furthermore, the high rigidity region HR is a region overlapping with the pair of grooves 54 seen from the width direction W, and it is preferable that it extends 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 can overlap the pair of grooves 54 as seen from the width direction W. The region where the fold line FL is formed in the femur region S3 is a part that is easily crushed in the widest direction W by the pair of grooves 54 . The high rigidity region HR is a region overlapped with the pair of grooves 54 seen from the width direction W, and the high rigidity region HR becomes a part that is more difficult to be crushed in the width direction W than the region where the fold line FL is formed. Furthermore, the portion extending rearward beyond the rear edge of the pair of grooves 54 in the high rigidity region HR is a portion that is difficult to crush in the width direction W because there is no pair of grooves 54 . In this manner, the absorbent core 51 gradually becomes more difficult to be crushed in the width direction W as it goes backward from the position of the fold line FL of the crotch region S3. Thereby, the area of the absorbent core 51 can be ensured more widely as it goes to 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. Accordingly, the outer region of the high rigidity region HR in the width direction deforms 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. As a result, the absorbent core 51 is shaped to accommodate excrement such as bodily fluids, and leakage of bodily fluids is further suppressed.

The high rigidity region HR is preferably provided on the inside of the outer edge of the absorbent core 51 in the width direction W, more preferably on the inner side of the outer edge of the narrowest part LA of the absorbent core 51 . The area inside the narrow area CA in the width direction W is likely to receive force from both feet of the wearer inward in the width direction W. Since the high rigidity region HR is provided on the inner side of the outer edge of the absorbent core 51 in the width direction W, the absorbent core 51 is less likely to deform inwardly in the width direction W in the high rigidity region HR. Thereby, the absorbent core 51 is less likely to be crushed on the buttock side, and the area of the absorbent core 51 can be easily secured, so that leakage of bodily fluid can be suppressed. Furthermore, if the high rigidity region HR is provided on the inner side of the outer edge in the width direction W of the absorbent core 51, since the high rigidity region HR is less likely to directly contact the wearer's foot, it can suppress giving the wearer a strange feeling.

The highly rigid 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 on the pair of grooves 54 . By providing the high rigidity region 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 undergroin area S3, the entire high rigidity region HR can be formed. The area of the absorbent core 51 is further secured by flattening.

It is more preferable that the high-rigidity region HR is adjacent to the pair of grooves 54 in the width direction W. Thereby, the whole area|region between a pair of groove|channel 54 can be flattened, and the area of the absorbent core 51 can be ensured more.

As mentioned above, the high-rigidity region HR may be constituted by an embossed region. Since the embossed region can be implemented by embossing by pressing the absorbent core 51, the highly rigid region HR can be formed without increasing the manufacturing cost of the absorbent article. Furthermore, since the embossed region is a region where the shape collapse of the absorbent core 51 is difficult, it becomes easy to secure the area of the absorbent core 51 .

The embossed area is preferably formed by including a plurality of dot-like embossed areas that are depressed from the skin side toward the non-skin side. If the embossing formed in the embossed area is concave from the skin side toward the non-skin side, the high-rigidity area HR tends to bend convexly toward the non-skin side. Therefore, in the high rigidity region HR, the area of the absorbent core 51 can be secured, and it can also 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 accommodate excrement such as bodily fluids, thereby further suppressing leakage of bodily fluids.

In this embodiment, the numerical value of the "length" of each part of the absorbent article 10 refers to the absorbent article 10 that has no wrinkles (except for the fold line FL) when the locking part 60 on the side is released and the absorbent article 10 is unfolded. The item is measured in the elongated state in which it is elongated.

In addition, the rigidity of each part of the absorbent core 51 can be measured by the measurement method of the Gurley (Galley) rigidity prescribed|regulated by standard standard JIS L-1096 (2010). For example, first, a test piece having a width of 25 mm and a length of 38 mm is collected from the absorbent core 51 to be measured. An adhesive film tape was attached to one end of the test piece, that is, the place held by the pinch plate of the Galley flexibility tester. Next, fit the lower end of the pinch plate of the Galley flexibility testing machine to the scale of the movable arm matching the size of the test piece. Next, the adhesive film tape side of the test piece was pinched by the pinching plate. At this time, the length of the test piece applied to the pendulum of the Galley flexibility tester was 5 to 6 mm. Next, the weight and installation position of the auxiliary weight are selected so that the memory of the Galley flexibility testing machine is between 3 and 6, and the auxiliary weight is installed. Then, when the test piece is located on the left side of the pendulum, the switch that is rotated to the left is pressed, and when the test piece is located to the right, the switch that is rotated to the right is pressed to operate the movable arm. Then, the scale at the moment when the rotating rod of the pendulum moves away from the test piece is read. For each test piece, both clockwise rotation and counterclockwise rotation of the pendulum were measured.

The hardness and softness of the test piece can be calculated by the following formula. Stiffness (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 installation position, Wb is the weight (g) of the weight installed at the center installation position, and Wc is the weight (g) of the weight installed at the bottom The weight (g) of the weight at the installation position. L is the movable arm scale (inch). D is the width (mm) of the test piece. RGr is the value in memory at the moment when the pendulum rotates clockwise and the rotating rod of the pendulum moves away from the test piece. RG1 is the value in the memory at the moment when the pendulum rotates to the left and the rotating rod of the pendulum is away from the test piece. The rigidity of each part of the absorbent core 51 is defined by the rigidity and softness obtained by the above measurement.

As mentioned above, although this invention was demonstrated in detail using the said Example, it is obvious for those skilled in the art that this invention is not limited to the Example demonstrated in this specification. The present invention can be modified and changed without departing from the gist and scope of the present invention determined by the claims. Therefore, the description in this specification is intended only for the purpose of illustration and description, and does not mean to limit the present invention in any way.

For example, in the above-mentioned embodiment, the absorbent main body 40 is constituted separately from the front body surrounding member 20 and the rear body surrounding member 30 . Alternatively, the absorbent main body 40 may be integrally formed with the front body surrounding member 20 and the rear body surrounding member 30 .

In addition, in the above-mentioned embodiments, 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 have the side locking portion 60, but may have a fastening belt for detachably fixing the front body peripheral region S1 and the rear body peripheral region S2 to each other.

In addition, the entire content of Japanese Patent Application No. 2017-254985 filed on December 28, 2017 is incorporated into this specification by reference. [industrial availability]

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

10‧‧‧Absorbent articles 40‧‧‧absorbent body 50‧‧‧absorbent 51‧‧‧absorbent core 54‧‧‧ditch 54f‧‧‧Front widening part 54r‧‧‧Rear widening part 54s‧‧‧front edge 56‧‧‧Rear side slit 58‧‧‧side slit 59‧‧‧central slit CA‧‧‧Narrow field FL‧‧‧broken line HR‧‧‧high rigidity area IL‧‧‧dashed line L‧‧‧Forward and backward direction LA‧‧‧The narrowest part L1‧‧‧Length S1‧‧‧Front area around S2‧‧‧The area around the hindquarters S3‧‧‧subordinate domain T‧‧‧thickness direction W‧‧‧width direction

[FIG. 1] A schematic diagram 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 sectional view of the absorbent article along line A-A in FIG. 2. [FIG. 4] A plan view of an absorbent core of an absorbent article. [FIG. 5] A schematic diagram of an absorbent core receiving a force inward in the width direction at the undergrown region.

51‧‧‧absorbent core

54‧‧‧ditch

54f‧‧‧Front widening part

54r‧‧‧Rear widening part

54s‧‧‧front edge

56‧‧‧Rear side slit

58‧‧‧side slit

59‧‧‧central slit

CA‧‧‧Narrow field

FL‧‧‧broken line

HR‧‧‧high rigidity area

IL‧‧‧dashed line

LA‧‧‧The narrowest part

L1‧‧‧Length

S1‧‧‧Front area around

S2‧‧‧The area around the hindquarters

S3‧‧‧Share domain

Claims (14)

An absorbent article comprising: a front-rear direction, a width direction perpendicular to the front-rear direction, a region around a front body, a region around a rear body, and an area disposed between the region around the front body and the region around the rear body The lower thigh region, and the absorbent core provided at least in the lower thigh region, the folding line for folding the absorbent article in half extends in the lower thigh region along the width direction, and the absorbent core has: at least in the lower thigh region A narrow region that shrinks inward 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 region extends in the front-back direction with respect to the fold line, and the absorbent The core has a rear widening portion that expands as the distance between the pair of grooves moves toward the rear, and the front end edge of the rear widening portion is a region that is located on the front side of the folding line and overlaps the narrow region. The interval between the pair of grooves in the undergroin region is 1/4 or more of the maximum width of the absorbent core in the width direction. The absorbent article according to claim 1, wherein the rear side edges of the pair of grooves are located within the narrow range in the front-rear direction. The absorbent article according to claim 1 or 2, wherein the pair of grooves do not reach the outer edge of the absorbent core in the width direction. The absorbent article according to claim 1 or 2 of the patent claims, wherein the absorbent core has the narrowest part in the narrow area where the length of the absorbent core in the width direction is the shortest, and the absorbent core has the narrowest part. The narrow portion extends along the aforementioned front-rear direction. The absorbent article according to claim 4, wherein the narrowest part of the absorbent core extends beyond the folding line. The absorbent article according to claim 1 or 2, wherein the pair of grooves has a front widening portion that expands as the distance between the pair of grooves goes forward. The absorbent article according to claim 1 or 2, wherein the absorbent core has the aforementioned width direction in the aforementioned narrow area. In the narrowest part where the length of the absorbent core is the shortest, the outer edges of the pair of grooves in the width direction are located inside the narrowest part of the absorbent core. An absorbent article comprising: a front-rear direction, a width direction perpendicular to the front-rear direction, a region around a front body, a region around a rear body, and an area disposed between the region around the front body and the region around the rear body The lower thigh region, and the absorbent core provided at least in the lower thigh region, the folding line for folding the absorbent article in half extends in the lower thigh region along the width direction, and the absorbent core has: at least in the lower thigh region A narrow region that shrinks inward 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 region extends in the front-back direction with respect to the fold line, and the absorbent The core has a rear widening portion that expands as the distance between the pair of grooves moves toward the rear, and the front end edge of the rear widening portion is a region that is located on the front side of the folding line and overlaps the narrow region. , has a leak-proof cuff extending in the aforementioned front-rear direction, which is configured on The pair of leak-proof cuffs on both sides that hold the center in the width direction, the rear side of the rear end edge of the pair of leak-proof cuffs has a cuff junction that cannot stand upright toward the skin side. A pair of dotted lines extending rearward from the pair of grooves in a direction in which the pair of grooves extend pass outside the cuff junction in the width direction. An absorbent article comprising: a front-rear direction, a width direction perpendicular to the front-rear direction, a region around a front body, a region around a rear body, and an area disposed between the region around the front body and the region around the rear body The lower thigh region, and the absorbent core provided at least in the lower thigh region, the folding line for folding the absorbent article in half extends in the lower thigh region along the width direction, and the absorbent core has: at least in the lower thigh region A narrow region that shrinks inward 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 region extends in the front-back direction with respect to the fold line, and the absorbent The core has a rear widening portion that expands as the distance between the pair of grooves goes toward the rear, The front end edge of the rear widening portion is a region located on the front side of the fold line and overlapping the narrow region, and the high rigidity region is a region located on the rear side of the fold line and including the center of the width direction. The rigid region is constituted by a region having a higher rigidity than the region between the broken line and the high-rigidity region, and the length of the high-rigidity region in the front-rear direction is greater than that from the broken line to the high-rigidity region. The length to the front edge is longer. The absorbent article according to claim 9, wherein at least a part of the high rigidity region is located on the rear side of the rear edge of the pair of grooves. The absorbent article according to claim 9, wherein the high-rigidity region is a region overlapping with the pair of grooves as viewed in the width direction, and is located on the rear side of the rear edge of the pair of grooves. extend. The absorbent article according to claim 9, wherein the high rigidity region is a region provided between the pair of grooves in the width direction. The absorbent article according to claim 9 of the patent application, wherein the high rigidity area is a pair of grooves in the width direction. next to each other. The absorbent article according to claim 9, wherein the high-rigidity region is provided in a region overlapping the narrow region when viewed from the width direction.

Images