JP2016010633A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article in which a rear region can be easily deformed along the buttocks of a wearer.SOLUTION: An absorbent article 1 comprises an absorber 21 and a cover sheet 22 disposed on a skin side of the absorber 21. Joint grooves 40 for compressing and joining the cover sheet 22 and the absorber 21 in a thickness direction are formed. The joint grooves 40 comprise a transverse groove 42A which traverses the width direction center of the absorbent article 1 in a width direction, and divides the absorbent article 1 into a central region 12 facing an excretion port and a rear region 30B located at the rear side with respect to the central region 12. The joint grooves 40 comprise a rear transverse groove 44B which traverses the width direction center of the absorbent article 1 in the width direction at the rear side with respect to the transverse groove 42A. The rear transverse groove 44B is positioned between two folding line parts of the absorbent article 1.

Description

  The present invention relates to an absorbent article.

  An example of an absorbent article that absorbs liquid (body fluid) such as menstrual blood excreted from the human body is a sanitary napkin. Such an absorbent article is provided with the absorber which absorbs a liquid, and the cover sheet arrange | positioned on the skin side rather than the absorber. As such an absorbent article, there is known an absorbent article in which a bonding groove for compressing and bonding a cover sheet and an absorbent body in the thickness direction is formed (for example, see Patent Documents 1 and 2). Moreover, such an absorbent article is normally packaged in the state folded along the fold line part.

Japanese Unexamined Patent Publication No. 2005-177078 Japanese Patent Laid-Open No. 2007-14635

A joining groove (crossing groove) that crosses the widthwise center of the absorbent article in the width direction may be formed, and a central region that faces the excretion opening may be separated from a rear region that is located behind the central region. . In this case, since the rear region is required to have a function of absorbing bodily fluids at a position facing the buttocks, the rear region is a region that requires a function that conforms to the shape of the wearer's buttocks (a region that requires fit with the buttocks). Become).
In the case of an absorbent article such as a sanitary napkin for night use, it is important to suppress liquid leakage (rear leakage) from the rear side of the wearer, or the anxiety of rear leakage is reduced. In order to give the wearer a sense of security, the rear area is enlarged. When the rear region becomes large in this way, the rear region needs to conform to the shape of the buttock in a wide region of the wearer's buttock.

  On the other hand, when the folded absorbent article is opened, the bend at the fold line portion remains, but a flat plate is formed between the fold line portion and the fold line portion (between the bend portion and the bend portion). Regions are formed. If this flat region is located in the rear region and the flat region is difficult to bend, the rear region is less likely to deform along the wearer's buttocks. As a result, the fit between the absorbent article and the heel portion is lowered, and there is a risk of back leakage.

  An object of this invention is to make it easy to deform | transform a back area | region along a wearer's buttocks.

The main invention for achieving the above object is:
An absorber,
A cover sheet disposed on the skin side of the absorbent body;
An absorbent article comprising:
A joining groove for compressing and joining the cover sheet and the absorber in the thickness direction is formed,
The joining groove is a transverse groove that crosses the widthwise center of the absorbent article in the width direction, and divides a central region that faces the excretion opening and a rear region that is located behind the central region. Has transverse grooves,
The joining groove has a rear transverse groove that transversely crosses the widthwise center of the absorbent article on the rear side of the transverse groove,
The absorbent article is characterized in that the rear transverse groove is located between two fold line portions of the absorbent article.

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

  According to this invention, it becomes easy to deform | transform a back area | region along a wearer's buttocks, and the fit property of an absorbent article improves.

FIG. 1 is a developed plan view of the absorbent article 1 as seen from the surface side. FIG. 2 is an exploded explanatory view of the absorbent article 1. FIG. 3 is a perspective view of the absorbent article 1. FIG. 4 is an explanatory diagram of the basis weight of the pulp in the absorbent body 21. FIG. 5 is a cross-sectional view of the vicinity of the bonding groove 40. FIG. 6 is an explanatory diagram of the joining groove 40. FIG. 7 is an explanatory diagram of the positional relationship between the bonding groove 40 and the absorber 21. 8A and 8B are reference explanatory views when a force is received from the outside to the inside of the pair of second side grooves 43B. FIG. 9 is an explanatory diagram of intervals between the plurality of joining grooves 40 that cross the width direction center of the absorbent article 1 in the width direction. FIG. 10 is an explanatory diagram of a fold line portion of the absorbent article 1. FIG. 11 is an explanatory diagram of the second embodiment. FIG. 12 is an explanatory diagram of the third embodiment.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  An absorbent article comprising an absorbent body and a cover sheet disposed on the skin side of the absorbent body, wherein a joining groove for joining the cover sheet and the absorbent body by compressing them in the thickness direction is formed. The joining groove is a transverse groove that crosses the widthwise center of the absorbent article in the width direction, and a central region that faces the excretion port, and a rear region that is located on the rear side of the central region And the joining groove has a rear transverse groove that transversely crosses the center of the absorbent article in the width direction on the rear side of the transverse groove, and the rear The absorbent article is characterized in that a transverse groove is located between the two fold lines of the absorbent article. According to such an absorbent article, it becomes easy to change a back field along a wearer's buttocks, and the fit nature of an absorbent article improves.

  It is desirable that the fold line portion overlaps a joining groove that crosses the widthwise center of the absorbent article in the width direction. This makes it difficult for wrinkles to be formed at the bent portion of the fold line portion.

  As for the space | interval of the front-back direction of several joining grooves which cross | intersect the width direction center of the said absorbent article in the width direction, it is desirable that it is so narrow that it is the said center area | region. Thereby, a back field becomes easy to change along a wearer's buttocks.

  The plurality of joining grooves that cross the widthwise center of the absorbent article in the width direction include the transverse groove and at least two rear transverse grooves, and the fold line portion includes the two rear parts. It is desirable to overlap with the rear transverse groove on the rear side of the transverse grooves. Thereby, it can suppress that an absorptive article bends in parts other than the back back transverse slot on the back side, and the curve of an absorptive article can be made loose, so that it is near a wearer's waist.

  The joint groove includes a first joint groove that includes the transverse groove and surrounds the central region, and a U-shaped second joint groove that defines the rear region, and the U-shaped second It is desirable that the joining groove is not formed between the end of the joining groove and the first joining groove. Thereby, since the deformation | transformation of a center area | region and a back area | region does not interlock | cooperate, a liquid leak can be suppressed.

  The curvature radius of the rear transverse groove is preferably larger than the curvature radius of the transverse groove. Thereby, a back field becomes easy to change along a wearer's buttocks, and the fit nature of an absorptive article improves.

  By forming irregularities in the pair of side grooves sandwiching the rear region from the width direction, the gap between the pair of side grooves is formed wide, and the position in the front-rear direction of the rear transverse groove is the largest of the gaps. It is desirable that the rear transverse groove is formed so as to be closer to the position in the front-rear direction where the interval is the narrowest than to the position in the front-rear direction where it becomes wider. Thereby, even if it receives the force which goes inside from the both sides of the width direction, it becomes difficult to form a deep valley on the upper side of the side groove, and the liquid leakage can be suppressed.

  It is desirable that the absorbent body has a low part having a lower basis weight than the surrounding area, and the transverse groove is formed in the low part. Thereby, the increase in the rigidity by compression of an absorber can be controlled and the fit nature of an absorptive article improves.

  A surface sheet is disposed on the skin side of the cover sheet, and the rear transverse groove is a joining groove that compresses and joins the surface sheet, the cover sheet, and the absorber in the thickness direction, and the rear transverse groove However, it is desirable that the surface sheet is disposed on the inner side in the width direction of the surface sheet, and the bonding groove is not formed on the surface sheet outside the end of the rear transverse groove. Thereby, the area | region with high cushioning properties continues in the front-back direction, and comfort is improved.

=== First Embodiment ===
<Overall configuration of absorbent article 1>
FIG. 1 is a developed plan view of the absorbent article 1 as seen from the surface side. FIG. 2 is an exploded explanatory view of the absorbent article 1. FIG. 3 is a perspective view of the absorbent article 1.

  The absorbent article 1 is an article that absorbs and retains body fluid (for example, menstrual blood) discharged from a wearer's excretion opening. In this embodiment, the absorbent article 1 is a night sanitary napkin. However, the absorbent article 1 may be a sanitary napkin for daytime, a paper diaper, an incontinence pad, or the like.

  In the following description, the front-rear direction and the left-right direction are defined as shown in FIG. That is, the longitudinal direction of the long absorbent article 1 is “front-rear direction”, the front side of the wearer is “front”, and the opposite side is “rear”. The width direction of the long absorbent article 1 is “width direction” or “left-right direction”, the right side of the wearer is “right”, and the opposite side is “left”. Moreover, as shown in FIG. 2, the direction orthogonal to the front-rear direction and the width direction (left-right direction) is “thickness direction”, the skin side of the wearer of the absorbent article 1 is “upper”, and the opposite side is “lower” " Further, the skin side surface (the surface in contact with the skin) of the wearer of the absorbent article 1 may be referred to as “front surface”, and the opposite surface may be referred to as “back surface”. The thickness direction is the normal direction of the front surface and the back surface.

  As shown in FIG. 1, the absorbent article 1 has a front part 3, a crotch part 5, and a rear part 7. The front part 3 is a part which will be located in a wearer's front side. The rear part 7 is a part which will be located in a wearer's rear side (buttock side, back side). The crotch part 5 is a part that is located between the front part 3 and the rear part 7.

In addition, the absorbent article 1 includes a central belt-like region 12, a side edge portion 14, and a leak-proof wall 16.
The central belt-like region 12 is a belt-like region located in the central portion in the width direction of the absorbent article 1 and is configured along the front-rear direction across the front portion 3, the crotch portion 5, and the rear portion 7. The central strip region 12 is a part that absorbs and holds the liquid. The center strip | belt-shaped area | region 12 has the absorber 21, the cover sheet 22, the back surface sheet 23, and the surface sheet 24 (refer FIG. 2). As will be described later, a central region 30A, a rear region 30B, a bonding groove 40, and an emboss pattern P (P1 to P4) are formed in the central strip region 12.
The side edge portion 14 is a portion of the edge in the width direction of the absorbent article 1, and is configured across the front portion 3, the crotch portion 5, and the rear portion 7. The side edge portion 14 has a wing portion 14A. The wing portion 14 </ b> A is a part that is wound around underwear and fixes the absorbent article 1 to the underwear, and is formed to extend outward from the left and right sides of the crotch portion 5. Although the absorbent article 1 has the back wing part 14B in the rear part 7, the absorbent article 1 does not need to be provided with the back wing part 14B. The side edge portion 14 including the wing portion 14A includes a side sheet 25 and a back sheet 23 (see FIG. 2).
The leak-proof wall 16 is a part (gather) that prevents liquid leakage from the gap. The leak-proof walls 16 are formed on both edges of the central strip region 12 along the front-rear direction. An elastic member 16A is arranged on the leak-proof wall 16 along the front-rear direction, and a gather is formed by the stretchability of the elastic member 16A (see FIG. 3). The leak-proof wall 16 is comprised from the site | part inside the side seat | sheet 25 (refer FIG. 2).

  As shown in FIG. 2, the absorbent article 1 includes an absorbent body 21, a cover sheet 22, a back sheet 23, a top sheet 24 and a side sheet 25.

The absorber 21 is a member that absorbs and holds liquid. The absorbent body 21 is formed by wrapping an absorbent material (for example, pulp, superabsorbent polymer) that absorbs body fluid with a packaging member (for example, tissue paper).
FIG. 4 is an explanatory diagram of the basis weight of the pulp in the absorbent body 21. The absorber 21 has a low portion 21A. The low part 21 </ b> A is a part having the smallest basis weight of the pulp in the absorbent body 21. The low portion 21A is a region having a lower basis weight than the surrounding region.

The cover sheet 22 is a liquid-permeable sheet member disposed on the skin side (upper side) of the absorbent body 21 (see FIG. 2). Here, the cover sheet 22 is composed of a top sheet 22A and a second sheet 22B, but may be composed of a single sheet member. The cover sheet 22 is made of, for example, a nonwoven fabric. The cover sheet 22 is disposed along the front-rear direction across the front portion 3, the crotch portion 5, and the rear portion 7, covers at least the upper side of the absorbent body 21, and constitutes the central strip region 12.
The cover sheet 22 and the absorbent body 21 are joined by a joining groove 40 formed by compression (squeezing) in the thickness direction. The joining groove 40 will be described later.

  The back sheet 23 is a liquid-impermeable sheet member disposed on the underwear side (lower side) of the absorber 21. The back sheet 23 is comprised, for example from a nonwoven fabric. The back sheet 23 constitutes the back surface of the absorbent article 1 and constitutes the central strip region 12 and the side edge portion 14. An adhesive (not shown) is applied to the lower surface of the back sheet 23 (the surface in contact with the undergarment). Prior to use of the absorbent article 1, a release sheet (not shown) for protecting the adhesive is provided below the back sheet 23. An absorber 21 is disposed between the cover sheet 22 and the back sheet 23.

  The top sheet 24 is a liquid-permeable sheet member disposed on the skin side with respect to the cover sheet 22. The top sheet 24 is a belt-like member located at the center in the width direction of the central belt-like region 12, and is configured along the front-rear direction across the front part 3, the crotch part 5, and the rear part 7. The surface sheet 24 is joined to the cover sheet 22, and the surface sheet 24 and the cover sheet 22 are embossed to form an emboss pattern P (P1 to P4). Further, the top sheet 24 is joined to the cover sheet 22 and the absorber 21 by the joining groove 40. The embossing pattern P and the joining groove 40 will be described later.

  The side seats 25 are sheet-like members located on the left and right sides of the cover sheet 22. The side seat 25 constitutes the side edge portion 14 including the wing portion 14 </ b> A and the leak-proof wall 16. In addition, the absorber 21 is enclosed by joining the periphery of the cover sheet 22, the back surface sheet 23, and the side sheet 25.

<About the joining groove 40 (squeezing groove)>
FIG. 5 is a cross-sectional view of the vicinity of the bonding groove 40.
The joining groove 40 is a groove-shaped part that compresses (squeezes) the cover sheet 22 and the absorbent body 21 in the thickness direction and joins them. The joining groove 40 may be referred to as a pressing groove or a hinge part.

In the vicinity of the joining groove 40, the absorbent body 21 becomes dense, and the liquid absorbency / retention property is high due to capillary action. For this reason, it is suppressed that the bodily fluid absorbed by the absorber 21 flows across the joining groove 40. On the other hand, since the absorber 21 is compressed in the vicinity of the joining groove 40, the rigidity is high. For this reason, the cushioning property of the site | part in which the absorber 21 was provided is higher in the site | part without the joining groove 40 than the site | part with the joining groove 40. FIG. When the joining groove 40 is formed at a position where the top sheet 24 is present, not only the cover sheet 22 and the absorbent body 21 but also the top sheet 24 are compressed, so that the rigidity becomes high.
Since the rigidity is high at the portion where the joining groove 40 is formed, the absorbent article 1 is hardly deformed when a force is applied along the groove direction of the joining groove 40. On the other hand, when a force directed from the direction perpendicular to the joining groove 40 to the joining groove 40 is applied, the absorbent article 1 is easily bent with the joining groove 40 as a fulcrum.

  Since the joining groove 40 is formed by compressing the absorber 21 in the thickness direction, the joining groove 40 becomes a recess (groove) deeper than an emboss pattern P described later. For this reason, the joining groove 40 is easier to visually recognize than the embossed pattern P.

  FIG. 6 is an explanatory diagram of the joining groove 40. FIG. 7 is an explanatory diagram of the positional relationship between the bonding groove 40 and the absorber 21. Hereinafter, the joining groove 40 will be described with reference to FIGS. 6 and 7 as well as FIG.

  The joining groove 40 has a transverse groove 42A. The crossing groove 42A is a joining groove 40 that crosses the widthwise center of the absorbent article 1 in the width direction, and divides the central region 30A and the rear region 30B. The central region 30A and the rear region 30B are both regions located in the center in the width direction of the central strip region 12 and extending in the front-rear direction. The central region 30A is a region on the front side of the transverse groove 42A, and is a region at least partially facing the excretion opening (eg, vaginal opening) and is a region that absorbs body fluid (eg, menstrual blood) excreted from the excretion opening. is there. The rear region 30B is a region on the rear side of the transverse groove 42A, and is located on the rear side of the central region 30A. The rear region 30B is a region that faces the wearer's buttocks, and is a region that absorbs bodily fluids behind the central region 30A.

  The central region 30A is a region where a function for absorbing and holding a large amount of body fluid is required. On the other hand, the rear region 30B is not required to absorb or retain body fluids as much as the central region 30A, but is required to have a function of absorbing body fluids at a position facing the buttocks, and is therefore suitable for the shape of the wearer's buttocks. Is a required area (an area where fit with the buttocks is required). The rear region 30B is deformed along the wearer's buttocks so that the body fluid flows rearward from the center region 30A through the wearer's tear (the longitudinal groove in the center of the left and right buttocks). It is desirable that the body fluid can be absorbed.

  The transverse groove 42A is formed in the lower portion 21A of the absorber 21 (see FIG. 7). Since the lower portion 21A is a region having a lower basis weight than the surrounding region, if the transverse groove 42A is formed in the lower portion 21A, an increase in rigidity due to compression of the absorbent body 21 can be suppressed, and the absorbent article 1 fits. (Contact with skin) is improved. In particular, since the transverse groove 42A is formed at the boundary between the central region 30A and the rear region 30B, by suppressing the rigidity in the vicinity of the transverse groove 42A, the central region 30A and the rear region 30B can easily come into contact with the skin. Improves absorption. Further, when the surface sheet 24 is at the center in the width direction as in the present embodiment, the surface sheet 24 is also compressed by the transverse groove 42A and the rigidity is likely to increase, so the transverse groove 42A is formed in the lower portion 21A of the absorber 21. It is particularly advantageous to do so.

  The joining groove 40 has a first joining groove 41A and a second joining groove 41B. A transverse groove 42A that separates the central region 30A and the rear region 30B is included in the first joining groove 41A.

  The first joining groove 41A is a joining groove 40 that defines a central region 30A that faces the excretion opening. Here, the first joining groove 41A is formed so as to surround the central region 30A. Thereby, the bodily fluid (for example, menstrual blood) excreted from the excretion port is less likely to leak to the outside of the central region 30A.

  The first joining groove 41A has a pair of first side grooves 43A and a front end transverse groove 44A together with the transverse groove 42A. 43 A of 1st side grooves are the joining grooves 40 which divide the left and right edges of the center area | region 30A, and a pair of 1st side grooves 43A are the joining grooves 40 which pinch | interpose the center area | region 30A from the width direction. The first side groove 43A is formed along the front-rear direction. The rear ends of the pair of first side grooves 43A are connected to the transverse groove 42A. This makes it difficult for body fluid to leak from the central region 30A to the rear side. The front end transverse groove 44A is a joining groove 40 that partitions the front edge of the central region 30A, and is a joining groove 40 that crosses the widthwise center of the absorbent article 1 in the width direction. Since the front end of the pair of first side grooves 43A and the front end crossing groove 44A are connected, it is difficult for body fluid to leak from the central region 30A to the front side.

  A front transverse groove 45A is further formed on the inner side (central region 30A) of the first joining groove 41A. The front crossing groove 45A is a joining groove 40 that is provided in front of the central region 30A and crosses the center in the width direction of the absorbent article 1 in the width direction. Unlike the front end crossing groove 44A, the front crossing groove 45A is not connected to the first side groove 43A. Providing the front transverse groove 45A makes it difficult for the body fluid to reach the front end transverse groove 44A, so that the body fluid is less likely to leak from the central region 30A to the front side.

  The second bonding groove 41B is a U-shaped bonding groove 40 that defines a rear region 30B located on the rear side of the central region 30A. The left and right ends (front ends) of the U-shaped second joining groove 41B are arranged so as to sandwich the transverse groove 42A of the first joining groove 41A from the left and right. As a result, the liquid that flows to the rear side beyond the transverse groove 42A enters the rear region 30B from between the left and right ends of the U-shaped second joining groove 41B, and therefore leaks to the outside by the second joining groove 41B. It becomes difficult to do.

  The joining groove 40 is not formed between the left and right ends of the U-shaped second joining groove 41B (the front end of the second side groove 43B) and the first joining groove 41A. For this reason, the rigidity between the first joining groove 41A and the second joining groove 41B becomes low. Thereby, since the deformation | transformation of the center area | region 30A and the back area | region 30B of the absorbent article 1 does not interlock | cooperate, the center area | region 30A and the back area | region 30B of the absorbent article 1 are each independently in the shape and movement of a wearer's buttocks. Since they can be deformed together, liquid leakage can be suppressed.

  The second joining groove 41B has a pair of second side grooves 43B and a rear end crossing groove 44B. The second side groove 43B is a joint groove 40 that partitions the left and right edges of the rear region 30B, and the pair of second side grooves 43B are joint grooves 40 that sandwich the rear region 30B from the width direction. The second side groove 43B is formed along the front-rear direction. The rear end crossing groove 44B is a joining groove 40 that partitions the rear edge of the rear region 30B, and is a joining groove 40 that crosses the widthwise center of the absorbent article 1 in the width direction. The rear ends of the pair of second side grooves 43B are connected to the rear end transverse groove 44B. This makes it difficult for body fluid to leak from the rear region 30B to the rear side.

  Two rear transverse grooves 45B are further formed inside the pair of second side grooves 43B (rear region 30B). The rear transverse groove 45B is a joining groove 40 that crosses the widthwise center of the absorbent article 1 in the width direction on the rear side of the transverse groove 42A. Further, the rear transverse groove 45B is a joining groove 40 that crosses the widthwise center of the absorbent article 1 in the width direction on the front side of the rear end transverse groove 44B. Unlike the rear transverse groove 44B, the rear transverse groove 45B is not connected to the second side groove 43B. Providing the rear transverse groove 45B makes it difficult for the body fluid to reach the rear end transverse groove 44B, so that the body fluid is less likely to leak from the rear region 30B to the rear side.

  The pair of second side grooves 43B are uneven in the left-right direction. As a result, the gap between the pair of second side grooves 43B is formed, and the width of the rear region 30B is formed wide. And the back crossing groove | channel 45B is formed in the vicinity (part near a part narrower than a site | part with a narrow space | interval) of the site | part with a narrow space | interval of a pair of 2nd side groove | channel 43B. That is, as shown in FIG. 6, when the narrowest interval between the pair of second side grooves 43B is W1, and the widest interval is W2, the position in the front-rear direction of the rear transverse groove 45B is more than the position in the front-rear direction of the interval W2. Also, the rear transverse groove 45B is arranged so as to be close to the position in the front-rear direction of the interval W1. The reason for this will be described next.

8A and 8B are reference explanatory views when a force is received from the outside to the inside of the pair of second side grooves 43B. The second side groove 43B is formed along a direction perpendicular to the paper surface (front-rear direction) in the drawing.
The absorbent article 1 is likely to receive a force toward the inside from the left and right sides as shown by the arrows in FIG. 8A due to the inseam of the wearer and the left and right buttocks. When receiving such a force, the second side groove 43B is bent between the inner side and the outer side with the second side groove 43B as a fulcrum. As a result, as shown in FIG. 8B, the rear region 30B rises upward, and a deep valley may be formed on the upper side (skin side) of the second side groove 43B (see the arrow in FIG. 8B). If such a deep valley is formed, a large gap is formed between the wearer's buttocks and this may cause liquid leakage.
In particular, when the distance between the pair of second side grooves 43B is wide as in the present embodiment, the force concentrates on a portion where the distance between the pair of second side grooves 43B is narrow. For this reason, a deep valley is particularly likely to be formed in a portion where the distance between the pair of second side grooves 43B is narrow.
Therefore, in the present embodiment, the rear transverse groove 45B is formed in the vicinity of a narrow part of the pair of second side grooves 43B (near a part narrower than a part having a wide interval). That is, as shown in FIG. 6, the position in the front-rear direction of the rear transverse groove 45B is larger than the position in the front-rear direction of the distance W2 (the position in the front-rear direction where the distance between the pair of second side grooves 43B is the largest). The rear transverse groove 45B is disposed so as to be close to the position in the front-rear direction (position in the front-rear direction where the distance between the pair of second side grooves 43B is the narrowest). Since the rear transverse groove 45B is formed by crossing the widthwise center of the absorbent article 1 in the width direction, the rear transverse groove 45B receives inward force from the left and right sides (force along the groove direction of the rear transverse groove 45B). However, the rigidity of the rear transverse groove 45B prevents the rear region 30B from being deformed so as to rise upward. Thereby, it becomes difficult to form a deep valley as shown by an arrow in FIG. 8B, and liquid leakage can be suppressed.

  The rear transverse groove 45 </ b> B is disposed inside the top sheet 24 in the width direction. Further, since the rear transverse groove 45B is not connected to the second side groove 43B, the joining groove 40 is not formed in the surface sheet 24 outside the left and right ends of the rear transverse groove 45B. For this reason, in this embodiment, the uncompressed surface sheet 24 (and the absorber 21) remains between the rear transverse groove 45B and the second side groove 43B. Thereby, since a part with high cushioning properties remains between the rear transverse groove 45B and the second side groove 43B, a region with high cushioning properties including this part continues in the front-rear direction, and comfort is improved. If the rear transverse groove 45B is connected to the second side groove 43B, the region having high cushioning properties is divided by the rear transverse groove 45B having high rigidity and low cushioning properties. The difference in feel increases and the comfort becomes worse.

  Both the rear transverse groove 45 </ b> B and the transverse groove 42 </ b> A are convexly curved rearward at the center in the width direction of the absorbent article 1. Since the transverse groove 42A is sandwiched between the left and right ends (front ends) of the U-shaped second joining groove 41B, the curve is steep. In contrast, the rear transverse groove 45B is more gently curved than the transverse groove 42A. That is, in the present embodiment, the curvature radius of the rear transverse groove 45B is larger than the curvature radius of the transverse groove 42A. Thereby, since the absorbent article 1 is easily bent with the rear transverse groove 45B as a fulcrum, the rear region 30B is easily deformed along the wearer's buttocks, and the fit of the absorbent article 1 is improved.

  FIG. 9 is an explanatory diagram of intervals between a plurality of joining grooves 40 (a transverse groove 42A, two rear transverse grooves 45B, and a rear end transverse groove 44B) that cross the widthwise center of the absorbent article 1 in the width direction. When the distance between the transverse groove 42A and the front rear transverse groove 45B is L1, the distance between the two rear transverse grooves 45B is L2, and the distance between the rear rear transverse groove 45B and the rear end transverse groove 44B is L3. The relationship is L1 <L2 <L3. That is, the space | interval of the front-back direction of the some joining groove | channel 40 which crosses the width direction center of the absorbent article 1 in the width direction is narrower toward the front side near the central region 30A and wider toward the rear side. Thereby, the rear region 30 </ b> B is more easily bent toward a portion closer to the crotch portion 5 (see FIG. 1). Generally, the wearer's buttocks are steeper in the region closer to the thigh and more gently in the region closer to the waist, so that the joint crosses the widthwise center of the absorbent article 1 in the width direction. By making the interval of the grooves 40 narrower toward the front side and wider toward the rear side, the rear region 30B is easily deformed along the wearer's buttocks.

FIG. 10 is an explanatory diagram of a fold line portion of the absorbent article 1.
The fold line portion is a region where the absorbent article 1 is bent. Since the absorbent article 1 is thick, the fold line portion has a width in the front-rear direction, but the center position of the fold line portion is shown in the drawing. Here, the three fold line portions are called “front fold line portion 51”, “center fold line portion 52”, and “rear fold line portion 53” in order from the front side.
The absorbent article 1 is packaged in a folded state by being valley-folded at a plurality of folding lines in the width direction. As shown in FIG. 3, even if the absorbent article 1 is unwound and opened, the bending at the fold line portion remains.

  In the present embodiment, the front rear transverse groove 45B of the two rear transverse grooves 45B is located between the central fold line portion 52 and the rear fold line portion 53. Therefore, as shown in FIG. 3, when the absorbent article 1 is opened, the front rear transverse groove 45 </ b> B is located in a flat area between the bent portions of the central fold line portion 52 and the rear fold line portion 53. To do. Thereby, when the absorbent article 1 is worn, the flat region between the bent portions of the central fold line portion 52 and the rear fold line portion 53 comes into contact with the wearer's buttocks, and the rear crossing is performed by the force from the buttocks. The front and rear of the rear transverse groove 45B are bent with the groove 45B as a fulcrum, and the rear region 30B is deformed along the wearer's buttocks. If there is no rear transverse groove 45B between the central fold line portion 52 and the rear fold line portion 53, the flat area between the bent portions of the central fold line portion 52 and the rear fold line portion 53 becomes difficult to bend, The region 30B is less likely to be deformed along the wearer's buttocks. Therefore, when the front rear transverse groove 45B is located between the central fold line portion 52 and the rear fold line portion 53, the rear region 30B is easily deformed along the wearer's buttocks, and as a result, absorbability is increased. The fitting property of the article 1 is improved.

  Incidentally, the line indicating the rear fold line portion 53 in FIG. 10 indicates the center position of the rear fold line portion 53, and the rear fold line portion 53 is a region having a width in the front-rear direction. In this embodiment, the rear fold line portion 53 (region having a width in the front-rear direction) overlaps with the rear rear transverse groove 45B. The rear rear transverse groove 45B is a joining groove that crosses the widthwise center of the absorbent article 1 in the width direction. Since the rigidity due to compression of the absorbent body 21 is high, the rear folding line portion 53 is formed with the rear transverse groove 45B. By overlapping, wrinkles are less likely to be formed at the bent portion of the rear fold line portion 53. Similarly, when the central fold line portion 52 overlaps the transverse groove 42A, it is difficult to form a crease at the bent portion of the central fold line portion 52.

  Moreover, as already demonstrated, in this embodiment, the some joining groove | channel 40 (crossing groove 42A, two back transverse grooves 45B, and rear end transverse groove 44B) which crosses the width direction center of the absorbent article 1 in the width direction. The distance in the front-rear direction is narrower toward the front side closer to the center region 30A and wider toward the rear side (see FIG. 9), thereby making the absorbent article 1 bend more sharply closer to the wearer's thigh. The closer the waist of the wearer is, the more gently the absorbent article 1 can be curved. However, if a broken line portion is disposed between the plurality of joining grooves 40 that cross in the width direction, the bent portion of the absorbent article 1 increases, and the absorbent article 1 is bent near the waist of the wearer. May be abrupt. On the other hand, in the present embodiment, the rear fold line portion 53 overlaps the rear rear transverse groove 45B of the two rear transverse grooves 45B. Thereby, it can suppress that the absorbent article 1 bends in parts other than the rear back cross groove 45B, the space | interval L2 (refer FIG. 9) of the front-back direction of two back cross grooves 45B, and a rear back cross groove. Since the absorbent article 1 can be curved according to the distance L3 between the 45B and the rear end crossing groove 44B, the curve of the absorbent article 1 can be made gentler as it is closer to the waist of the wearer.

  The number of the rear transverse grooves 45B between the central fold line portion 52 and the rear fold line portion 53 is one, but a plurality of them may be provided. However, if the number of the rear transverse grooves 45B increases too much, the rigidity of the absorbent article 1 becomes high. Therefore, the rear transverse grooves 45B are 1 to 3 depending on the distance between the central fold line portion 52 and the rear fold line portion 53. It is desirable to make it about a point.

<About embossed pattern P>
The emboss pattern P (see P1 to P4 in FIG. 1) is a pattern of emboss marks formed by embossing. In the present embodiment, the emboss pattern P is formed by embossing the top sheet 24 and the cover sheet 22 (see FIGS. 1 and 2). Since the joining groove 40 is formed by compressing (squeezing) the absorbent body 21 in the thickness direction, the embossed pattern P is formed by embossing without including the absorbent body 21 (see FIG. 2). P becomes a processing mark shallower than the joining groove 40.

In the area where the embossed pattern P is formed, the bulk on the absorbent body 21 (thickness of the surface sheet 24 and the cover sheet 22) is narrowed, so that body fluid can easily penetrate into the absorbent body 21 and the embossed trace has a density due to compression. Therefore, the formability is improved. For this reason, it is desirable to form the embossed pattern P in both the central region 30A and the rear region 30B.
However, if the common emboss pattern P is formed on the surface of the central region 30A and the surface of the rear region 30B, the joint groove 40 deeper than the emboss pattern P (the joint groove 40 having higher visibility than the emboss pattern P). Although the central region 30A and the rear region 30B are separated, it is difficult for the wearer to identify the central region 30A and the rear region 30B.
Therefore, in the present embodiment, the embossed pattern P (specifically, the central pattern P2) in the central region 30A and the embossed pattern P (specifically, the first rear pattern P3 and the second rear pattern P4) in the rear region 30B. Are different. Thereby, compared with the case where the common emboss pattern P is formed on the surface of the central region 30A and the surface of the rear region 30B, it becomes easier to distinguish the central region 30A and the rear region 30B. It becomes easy to wear the absorbent article 1 after grasping the difference in function from the rear region 30B.

  In addition, when the arrangement | positioning of an embossing trace differs, the embossing pattern P will differ. In addition, even when the shape and size of the embossed marks are different, the embossed pattern P is different. In the present embodiment, the embossed trace has a dot shape, but the embossed trace may have another shape (for example, a linear shape).

  As shown in FIG. 1, the emboss pattern P has an end pattern P1, a center pattern P2, a first rear pattern P3, a second rear pattern P4, and an end pattern P1 in order from the front. Between each pattern, there is a boundary region where the pattern gradually changes.

  The end pattern P1 is an emboss pattern P formed on the front end side and the rear end side of the absorbent article 1. The embossing pattern P on the front end side of the absorbent article 1 and the embossing pattern P on the rear side are common. Thereby, when forming the absorbent article 1 by cutting the outer edge of the absorbent article 1 while continuously forming the absorbent article 1 in the front-rear direction of the base material, the absorbent article adjacent on the base material Since one end pattern P1 can be formed by common embossing, manufacture becomes easy.

  The center pattern P2 is an emboss pattern P mainly formed in the center region 30A. The central pattern P2 has more embossed traces than the other embossed patterns P. Here, “the number of embossed marks is dense” means that the number of embossed marks per unit area is large. By forming the embossed traces of the central pattern P2 densely, the embossed pattern P formed in the central region 30A is formed more densely than the embossed pattern P of the rear region 30B. become.

By increasing the number of embossed marks in the central region 30A, the bulk (the thickness of the topsheet 24 and the cover sheet 22) on the absorbent body 21 in the central region 30A is reduced, and the absorbability of body fluid in the central region 30A is improved. . Further, when the number of embossed marks in the central region 30A becomes dense, the embossed pattern P in the central region 30A can be easily viewed, and the central region 30A can be easily viewed. In addition, since the number of embossed traces in the central region 30A becomes dense, the wearer can recognize that the absorption function of the central region 30A is high. Can be induced. When the two embossing patterns P are compared, even if the “area” of the embossed trace per unit area is the same, the larger the “number” of the embossed trace per unit area, the more the body fluid is absorbed. And the visibility of the embossed pattern P is good.
Conversely, the embossed pattern P in the rear region 30B has a rougher number of embossed marks (embossed) than the embossed pattern P in the central region 30A. Thereby, since the rigidity of the surface sheet 24 and the cover sheet 22 in the rear region 30B is lowered, the rear region 30B is easily deformed according to the shape of the wearer's buttocks. Moreover, by making the number of the embossed marks in the rear region 30B coarse, it is possible to make the wearer recognize that the rear region 30B is low in rigidity and easily deforms in accordance with the shape of the buttock.

  The first rear pattern P3 is an emboss pattern P formed between the transverse groove 42A and the front rear transverse groove 45B. The second rear pattern P4 is an emboss pattern P formed between the two rear transverse grooves 45B. The first rear pattern P3 and the second rear pattern P4 are different emboss patterns P. As a result, the front rear transverse groove 45B between the first rear pattern P3 and the second rear pattern P4 is easily visible. Further, by visually recognizing the front rear transverse groove 45B, the wearer can recognize that there is a part having a different function in the rear region 30B on the rear side of the central region 30A, thereby reducing anxiety of rear leakage. Can give the wearer a sense of security.

  In addition, the second rear pattern P4 has a rougher embossed trace than the first rear pattern P3. That is, the embossed trace of the embossed pattern P becomes gradually rougher toward the rear region from the central region 30A. When the wearer visually recognizes that the embossed pattern P is formed in this manner, the wearer can easily recognize that the rear region 30B is low in rigidity and easily deforms in accordance with the shape of the buttock.

  In the present embodiment, the surface sheet 24 is disposed on the skin side of the cover sheet 22, and the emboss pattern P is formed on the surface sheet 24. By forming the embossed trace on the surface sheet 24, the depth of the embossed trace is increased and the stereoscopic effect due to the shadow is easily visually recognized, so that the embossed pattern P (and the change of the embossed pattern P) becomes clear. If the embossed pattern P is formed on the cover sheet 22 without providing the top sheet 24, the embossed trace becomes unclear and the embossed pattern P becomes difficult to be visually recognized.

  Moreover, in this embodiment, the surface sheet 24 is arrange | positioned inside a pair of 1st side groove | channel 43A (joining groove | channel 40) which pinches | interposes center area | region 30A from the width direction. Thereby, since the embossed trace (embossed trace on the surface sheet 24) visually recognized is disposed only inside the pair of first side grooves 43A, the first side groove 43A (joining groove 40) is visually recognized by the emboss pattern. Therefore, the visibility of the central region 30A defined by the first side groove 43A is improved. If the topsheet 24 is arranged wider than the pair of first side grooves 43A and the emboss pattern P is formed wider than the pair of first side grooves 43A, the first side grooves 43A ( Although the left and right edges of the central region 30A are partitioned by the first side groove 43A) having higher visibility than the embossed pattern P, the left and right edges of the central region 30A due to the first side groove 43A are less visible. As a result, the visibility of the central region 30A is reduced.

  As shown in FIG. 10, in this embodiment, the boundary area | region of the center pattern P2 and the 1st back pattern P3 and the center folding line part 52 of the absorbent article 1 overlap. Moreover, the boundary area | region of the 2nd back pattern P4 and the edge part pattern P1 and the back fold line part 53 of the absorbent article 1 overlap. Thus, by overlapping the boundary region where the emboss pattern P changes and the fold line portion, the fold line portion remains bent as shown in FIG. Since it looks, it becomes easy to make a wearer recognize the change of the embossing pattern P. FIG.

=== Another Embodiment ===
FIG. 11 is an explanatory diagram of the second embodiment. In the second embodiment, the embossed pattern P is not formed.
FIG. 12 is an explanatory diagram of the third embodiment. In the third embodiment, the absorbent article 1 does not include the top sheet 24.
Also in the second and third embodiments, as in the first embodiment, the front rear transverse groove 45B of the two rear transverse grooves 45B is located between the central fold line portion 52 and the rear fold line portion 53. positioned. For this reason, when the absorbent article 1 is opened, the front rear transverse groove 45B is located in a flat area between the bent portions of the central fold line portion 52 and the rear fold line portion 53. The rear region 30B is easily deformed along the person's buttocks, and as a result, the fit of the absorbent article 1 is improved.

  In the above description, the central region 30A is surrounded by the first joining groove 41A, but may be partitioned by the U-shaped joining groove 40 like the second joining groove 41B. On the contrary, the rear region 30 </ b> B is partitioned by the U-shaped second joining groove 41 </ b> B, but may be surrounded by the joining groove 40. As long as the central region 30A and the rear region 30B are separated by the transverse groove 42A, the joining groove 40 that divides the central region 30A and the rear region 30B may have other shapes.

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

1 absorbent article, 3 front part, 5 crotch part, 7 rear part,
12 central strip region, 14 side edges,
14A wing part, 14B rear wing part,
16 leakage barrier, 16A elastic member,
21 absorber, 21A low part,
22 cover sheet, 22A top sheet, 22B second sheet,
23 Back sheet, 24 Front sheet, 25 Side sheet,
30A center area, 30B rear area,
40 joining grooves, 41A first joining grooves,
42A transverse groove, 43A first side groove,
44A Front end transverse groove, 45A Front transverse groove,
41B second joining groove, 43B second side groove,
44B rear end transverse groove, 45B rear transverse groove,
50 line segment, 51 front line segment,
52 center broken line part, 53 rear broken line part P embossed pattern, P1 end pattern,
P2 center pattern, P3 first rear pattern,
P4 2nd rear pattern

Japanese Patent Application Laid-Open No. 2005-177078 JP 2007-14635 A

The main invention for achieving the above object is:
An absorber,
A cover sheet disposed on the skin side of the absorbent body;
An absorbent article comprising:
A joining groove for compressing and joining the cover sheet and the absorber in the thickness direction is formed,
The joining groove is a transverse groove that crosses the widthwise center of the absorbent article in the width direction, and divides a central region that faces the excretion opening and a rear region that is located behind the central region. Has transverse grooves,
The joining groove has a rear transverse groove that transversely crosses the widthwise center of the absorbent article on the rear side of the transverse groove,
The rear transverse groove is located between two fold lines of the absorbent article ;
The fold line portion overlaps with the entire joining groove that crosses the widthwise center of the absorbent article in the width direction.

Claims (9)

An absorber,
A cover sheet disposed on the skin side of the absorbent body;
An absorbent article comprising:
A joining groove for compressing and joining the cover sheet and the absorber in the thickness direction is formed,
The joining groove is a transverse groove that crosses the widthwise center of the absorbent article in the width direction, and divides a central region that faces the excretion opening and a rear region that is located behind the central region. Has transverse grooves,
The joining groove has a rear transverse groove that transversely crosses the widthwise center of the absorbent article on the rear side of the transverse groove,
The absorbent article, wherein the rear transverse groove is located between two fold line portions of the absorbent article. The absorbent article according to claim 1,
The absorbent article, wherein the fold line portion overlaps with a joining groove that crosses the widthwise center of the absorbent article in the width direction. The absorbent article according to claim 1,
The absorbent article, characterized in that the distance in the front-rear direction of the plurality of joining grooves crossing the widthwise center of the absorbent article in the width direction is narrower as it is closer to the central region. The absorbent article according to claim 3,
The plurality of joining grooves that cross the widthwise center of the absorbent article in the width direction include the transverse grooves and at least two of the rear transverse grooves,
The absorbent article, wherein the fold line portion overlaps the rear transverse groove on the rear side of the two rear transverse grooves. The absorbent article according to any one of claims 1 to 4,
The joining groove includes a first joining groove that includes the transverse groove and surrounds the central region, and a U-shaped second joining groove that defines the rear region,
The absorbent article, wherein the joining groove is not formed between an end portion of the U-shaped second joining groove and the first joining groove. An absorbent article according to any one of claims 1 to 5,
An absorptive article, wherein a curvature radius of the back crossing groove is larger than a curvature radius of the crossing groove. The absorbent article according to any one of claims 1 to 6,
By forming irregularities in the pair of side grooves sandwiching the rear region from the width direction, the gap between the pair of side grooves is formed,
The rear transverse groove is formed so that the position in the front-rear direction of the rear transverse groove is closer to the position in the front-rear direction where the distance is the narrowest than the position in the front-rear direction where the distance is the largest. An absorbent article characterized by the above. The absorbent article according to any one of claims 1 to 7,
The absorbent body has a lower part with a lower basis weight than the surrounding area,
The said crossing groove is formed in the said low part, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 8,
The surface sheet is arranged on the skin side from the cover sheet,
The rear transverse groove is a joining groove that compresses and joins the surface sheet, the cover sheet, and the absorber in the thickness direction,
The rear transverse groove is disposed inside the width direction of the top sheet,
The absorbent article, wherein the joining groove is not formed in the top sheet outside the end of the rear transverse groove.

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