CN112334103A

CN112334103A - Absorbent article

Info

Publication number: CN112334103A
Application number: CN201980044157.5A
Authority: CN
Inventors: 黑田贤一郎; 丸山贵史; 卡那朋·伽帝拉帕它挪; 野田祐树
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-07-06
Filing date: 2019-07-04
Publication date: 2021-02-05
Anticipated expiration: 2039-07-04
Also published as: JP2020005845A; TW202005624A; JP6634478B2; CN112334103B; WO2020009204A1

Abstract

Provided is an absorbent article which can follow the body of a wearer without giving an uncomfortable feeling even when the wearer is performing exercise or sports. The first side edge (17) and the second side edge (18) of the absorbent article (10) each have a narrowed portion (30) extending inward in the transverse direction (X). The narrow portion (30) located at the first side edge portion (17) and the narrow portion (30) located at the second side edge portion (18) are located at opposite positions in the lateral direction, and the absorbent body (20) has a pair of deformation-inducing portions (40) extending inward in the lateral direction (X) from both side edges (20c, 20d) of the absorbent body. The deformation-inducing section (40) of the absorber (20) is located on an imaginary line (K1-K3) that extends linearly from the inner end (34) of the narrowing section (30) toward the longitudinal centerline (P).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article, and more particularly to an absorbent article such as a light incontinence pad, a panty liner, a sanitary napkin, a white tape absorbent pad, a urine absorbent pad, and a disposable diaper for adults and children.

Background

Conventionally, there is known an absorbent article including a deformation-inducing portion in a part of an absorbent body. For example, patent document 1 discloses an absorbent article including: a liquid-permeable topsheet; a non-liquid-permeable back sheet; and an absorber sandwiched between the topsheet and the backsheet, wherein the absorber is formed with a plurality of deformation-inducing portions extending from both side edges to the inside in the lateral direction. Further, patent document 2 discloses an absorbent article including: a liquid-permeable topsheet; a non-liquid-permeable back sheet; and an absorber sandwiched between the front sheet and the back sheet, wherein a plurality of constrictions are formed at both side edges extending in the longitudinal direction outside both side edges of the absorber in the width direction.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2008-93289 (P2008-93289)

Patent document 2: japanese patent laid-open No. 2017-140422 (P2017-140422)

In the absorbent article disclosed in patent document 1, the absorbent body can be deformed along the shape of the wearer's body by forming a plurality of deformation-inducing portions in the absorbent body. On the other hand, in the absorbent article disclosed in patent document 2, both side edge portions located on the outer sides in the width direction of both side edges of the absorbent body have a plurality of narrowed portions, and thus the shape thereof can be deformed in accordance with the movement of the body.

Technical problem to be solved by the invention

However, in the absorbent article described in patent document 1, since both side edge portions located on the outer sides in the lateral direction of both side edges of the absorbent body do not have a shape that follows the deformation inducing portions of the absorbent body, for example, when a wearer performs a sport or a sport involving a relatively large motion such as running or jumping, the absorbent body is in a tight state due to the interlocking of the motion of the body shape but the both side edge portions are not interlocked, and there is a fear that discomfort is given to the wearer. On the other hand, in the absorbent article described in patent document 2, although a plurality of narrowed portions are formed at both side edges, since the deformation inducing portion is not formed at the absorbent body, both side edges deform following the large movement of the body, but the absorbent body cannot deform in accordance with the deformation, and there is a fear that discomfort is given to the wearer.

Disclosure of Invention

The present invention addresses the problem of providing an absorbent article that can follow the body of a wearer and reduce discomfort even when the wearer is performing sports or physical training.

Means for solving the problems

The present invention relates to an absorbent article having a longitudinal direction and a lateral direction and having a longitudinal centerline bisecting a dimension in the lateral direction, the absorbent article comprising: a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body sandwiched between the topsheet.

The absorbent article of the present invention further includes a first side edge portion and a second side edge portion which are located outside both side edges of the absorbent body in the lateral direction, the first side edge portion and the second side edge portion each having a narrowed portion extending inward in the lateral direction, the narrowed portion located at the first side edge portion and the narrowed portion located at a position opposite to the narrowed portion of the second side edge portion in the lateral direction, the absorbent body having a pair of deformation-inducing portions extending inward in the lateral direction from both side edges of the absorbent body, the deformation-inducing portions of the absorbent body being located on an imaginary line extending linearly from an inner end of the narrowed portion toward the longitudinal center line.

The absorbent article of the present invention includes the following preferred embodiments. In the following embodiments, the configurations of a plurality of embodiments may be arbitrarily selected and combined, in addition to the single configuration.

(1) The deformation inducing portion is a portion thinner than other portions in the absorbent body or a slit.

(2) The narrowing portion extends obliquely with respect to the longitudinal centerline, and the imaginary line obliquely intersects the longitudinal centerline.

(3) A fixing region extending in the longitudinal direction is located on an outer surface of the back sheet, the fixing region not being located outside the longitudinal direction of the narrowing portion.

(4) A part of the fixing region and an inner end of the deformation inducing portion overlap each other in a plan view, and the overlapping portion has a size smaller than 25% of a transverse dimension of the deformation inducing portion.

(5) The inner end of the deformation inducing portion does not overlap the fixing region in plan view, and the fixing region is located on the inner side in the lateral direction of the inner end.

(6) The first side edge portion and the second side edge portion have: a wing part extending to the outer side of the transverse direction; and first and second narrow portions separated and opposed in the longitudinal direction, the first and second narrow portions being located at the base end portions of the wing portions, respectively.

(7) A middle-high portion of the absorbent body, which is thicker than the other portions, is located between the wing portions.

(8) An intersection of the imaginary line of the narrowed portion located at the first side edge portion and the imaginary line of the narrowed portion located at the second side edge portion, which is opposite to the narrowed portion in the lateral direction, is located outside the vertical direction of the mid-high portion.

(9) The constricted portion and the deformation-inducing portion are curved, and the deformation-inducing portion has a shape that is curved more gently than the constricted portion.

(10) And a transverse center line bisecting the dimension in the longitudinal direction, wherein an intersection angle between a virtual longitudinal-section line connecting the inner end of the first narrowing portion and the inner end of the second narrowing portion and the transverse center line is 90 degrees or less.

(11) The deformation inducing portion located at a position opposite to the narrowed portion in the lateral direction extends inward in the longitudinal direction of the narrowed portion.

(12) The package further includes a first bending line and a second bending line extending in the transverse direction and formed in a state of being housed in a single package, the first narrowing portion and the deformation inducing portion located at a position facing the first narrowing portion intersect with the first bending line, and the second narrowing portion and the deformation inducing portion located at a position facing the second narrowing portion intersect with the second bending line.

(13) The absorbent body has: a first side edge and a second side edge extending in the longitudinal direction, a first imaginary opposing line connecting the first narrowing portion at the first side edge and the second narrowing portion at the second side edge, and a second imaginary opposing line connecting the first narrowing portion at the second side edge and the second narrowing portion at the first side edge.

(14) An intersection of the imaginary line of the narrowed portion located at the first side edge portion and the imaginary line of the narrowed portion located at the second side edge portion opposite to the narrowed portion in the lateral direction is located in the middle height portion.

Effects of the invention

According to the absorbent article of the present application, even when the wearer performs a relatively large motion due to exercise, sports, or the like, the force applied to the absorbent article is absorbed and absorbed by the side edges and the absorber, and the absorbent article can follow the body of the wearer, thereby reducing discomfort.

Drawings

The drawings show specific embodiments of the present invention, and include not only essential structures but also optional and preferred embodiments.

Fig. 1 is a plan view of a sanitary napkin, which is an example of an absorbent article, as viewed from the front surface side.

Fig. 2 is a plan view of the sanitary napkin as viewed from the back side.

Fig. 3 is a plan view of the sanitary napkin similar to fig. 1.

Fig. 4 is a partially enlarged view of an area surrounded by a one-dot chain line IV of fig. 3.

Fig. 5 is an enlarged view of the wing portion and its vicinity.

Fig. 6 is a cross-sectional view showing the appearance of the sanitary napkin in a worn state.

Detailed Description

The following embodiments include not only the indispensable structure of the invention but also an alternative and preferable structure of the absorbent article shown in the drawings. Hereinafter, an embodiment of a sanitary napkin 10 as an example of an absorbent article of the present invention will be described with reference to the drawings. For convenience of explanation, the outline line of the absorber 20 and the imaginary line K1-K3 are shown as thicker lines than other lines in the drawings.

Referring to fig. 1 to 3, the sanitary napkin 10 includes: a longitudinal direction Y, a transverse direction X, a thickness direction Z, a longitudinal center line P bisecting a dimension in the transverse direction X, and a transverse center line Q bisecting a dimension in the longitudinal direction Y, the sanitary napkin 10 having a skin-facing surface side and a non-skin-facing surface side opposite to the skin-facing surface side, the sanitary napkin 10 comprising: a liquid-permeable topsheet 11 positioned on the skin-facing surface side, a non-liquid-permeable backsheet 12 positioned on the non-skin-facing surface side, and a liquid-absorbent body 20 positioned between these two

sheets

11, 12.

The sanitary napkin 10 has a substantially cruciform shape defined by a first end edge 10a and a second end edge 10b which are concavely curved inward in the longitudinal direction Y, and a first side edge 10c and a second side edge 10d which are convexly curved outward in the transverse direction X at a portion intersecting the transverse center line Q. The outline (outer contour) of the sanitary napkin 10 is a non-streamlined shape having a plurality of concave and convex portions, and is symmetrical about the longitudinal centerline P.

Although not shown, an intermediate sheet made of a relatively large bulk fiber nonwoven fabric may be disposed between the topsheet 11 and the absorbent member 20 in order to improve the flexibility of the sanitary napkin 10.

The absorbent body 20 has: a first end edge 20a opposite the first end edge 10 a; a second end edge 20b opposite the second end edge 10 b; and a first side edge 20c and a second side edge 20d extending in the longitudinal direction between the first end edge 20a and the second end edge 20 b. The topsheet 11 and the backsheet 12 extend outward from the outer periphery of the absorbent body 20, and the pair of side sheets 14 extending in the longitudinal direction Y are arranged on the skin-facing surface side of the topsheet so as to face each other in the transverse direction. The pair of side sheets 14 are joined to the surface sheet 11 via side bonding portions.

The sanitary napkin 10 further has an outer peripheral edge portion extending from the outer peripheral edge of the absorbent member 20. The outer peripheral edge portion has a first end edge 15 and a second end edge 16 (both end portions) formed by the front sheet 11, the back sheet 12, and the side sheet 14, and a first side edge 17 and a second side edge 18 (both side edge portions), the first end edge 15 and the second end edge 16 extend in the transverse direction X at the outer side in the longitudinal direction Y of the first end edge 20a and the second end edge 20b of the absorbent body 20, and the first side edge 17 and the second side edge 18 extend in the longitudinal direction Y at the outer side in the transverse direction X of the first side edge 20c and the second side edge 20d of the absorbent body 20. The first side edge portion 17 and the second side edge portion 18 each have a wing portion 19 projecting outward in the lateral direction X. The sheets stacked on each other to form the outer peripheral edge portion are joined to each other via an outer peripheral seal portion 7 located along the outer peripheral edge of the sanitary napkin 10.

Referring to fig. 2, a plurality of fastening regions 50 are disposed on the back side of the sanitary napkin 10. The plurality of fastening regions 50 are configured to fasten the sanitary napkin 10 to a garment such as underwear, and are formed of a plurality of linear adhesives or pressure-sensitive adhesives extending in the longitudinal direction Y. The fastening regions 50 have a central fastening region 51 extending in the longitudinal direction Y in a region overlapping the absorbent body 20 and side fastening regions 52 located on the wing portions 19, and before use, the fastening regions 50 are covered with a separator (not shown).

As the top sheet 11, a sheet permeable to liquid components contained in body fluids, such as an open plastic film, woven fabric, or nonwoven fabric, can be preferably used. As the back sheet 12, a thermoplastic resin film mainly composed of a thermoplastic resin such as polyethylene or polypropylene can be preferably used. The side sheet 14 can be made of the same sheet material as the surface sheet 11. However, in order to make it difficult for body fluid to flow to the outside of the sanitary napkin 10, a sheet material having hydrophobic or water-repellent properties is preferably used.

The joining of the respective sheets in the outer peripheral seal portion 7 can be performed by the following joining alone or in combination: adhesive-based bonding; joining by a known welding means such as ultrasonic welding, thermal welding, laser welding, and high-frequency wave welding; and bonding based on imprint processing. The sheets stacked in the thickness direction Z are bonded to each other with an adhesive such as a hot melt adhesive. Examples of the method of applying the hot-melt adhesive include various known coating methods such as spiral coating, curtain coating, and spray coating.

The sanitary napkin 10 is stored in a single package body in a state of being folded into three. The individual package is formed by folding the package sheet and the sanitary napkin 10, and the sanitary napkin 10 has a first bending line 101 and a second bending line 102 extending in the transverse direction X formed when folded. The first bend line 101 and the second bend line 102 extend in the lateral direction X so as to overlap base end portions of the pair of wing portions 19.

The absorbent body 20 comprises a liquid-absorbent core imparted with a desired shape, and is preferably covered with a core-covering sheet. The liquid-absorbent core has a core composed of water-insoluble superabsorbent polymer particles (SAP particles); an absorbent and dispersible material made of cellulose fibers such as wood pulp (pulp fibers) and rayon fibers. The region between the wings 19 of the absorbent body 20 is a region facing the vaginal opening of the wearer, and the middle-high portion 21 of the absorbent body 20, which is thicker than the other portions, is located in this region. The mid-high portion 21, which is the region opposite the vaginal opening, is located between the wings 19 in the transverse direction X. On the other hand, when the sanitary napkin 10 does not have the flap 19, it is preferably disposed between the first bending line 101 and the second bending line 102 of the sanitary napkin 10 in the longitudinal direction Y.

Referring to fig. 1 to 3, the sanitary napkin 10 has a narrowed portion 30 located at a first side edge portion 17 and a second side edge portion 18 (both side edge portions) and extending inward in the transverse direction X. The narrowing portion 30 is constituted by a portion extending inward in the lateral direction X from the first side edge 10c of the first side edge portion 17 and a portion extending inward in the lateral direction X from the second side edge 10d of the second side edge portion 18, which are located opposite to each other in the lateral direction X.

The narrowing portion 30 has: a first narrowing 31 located between the transverse centerline Q and the first end edge 10 a; and a second narrowing 32 and a third narrowing 33 located between the transverse centerline Q and the second end edge 10 b. The second narrowed portion 32 is located closer to the transverse center line Q than the third narrowed portion 33.

Referring to fig. 4, the narrowing portion 30 has a shape gradually narrowing toward the longitudinal centerline P, and has: an inner end (top end) 34; and an outer end (base end) 35 located on the first side edge 10c and the second side edge 10d side. The narrowed portion 30 extends obliquely with respect to the longitudinal center line P toward the transverse center line Q. The shape and position of the narrowing portion 30 can be appropriately changed as long as the following technical effect of the invention of the present application is obtained, and for example, the shape may be a sharp convex shape, a quadrangular shape, a polygonal shape, or the like, in addition to the illustrated form.

The absorber 20 includes a pair of deformation inducing portions 40 extending inward in the transverse direction X from both

side edges

20c, 20 d. The deformation inducing portion 40 includes: a first deformation inducing portion 41 located between the transverse center line Q and the first end edge 20 a; and a second deformation inducing portion 42 and a third deformation guiding portion 43 located between the transverse centerline Q and the second end edge 20 b. The second deformation inducing portion 42 is located closer to the transverse center line Q than the third deformation inducing portion 43.

Referring to fig. 4, the deformation inducing portion 40 has a shape convexly curved toward the longitudinal centerline P, and has an inner end (tip end) 44 and an outer end (base end) 45 located on the first side edge 20c and the second side edge 20d side. The deformation inducing portion 40 is formed by a portion from which a part of the absorber 20 is cut out or a thin portion thinner than the other portion of the absorber 20. In the illustrated example, the absorbent member is formed by cutting out a part of the absorbent member 20. The shape of the deformation inducing portion 40 can be appropriately changed as necessary.

Referring again to fig. 3, the constricted portion 30 and the deformation-inducing portion 40 are located at positions opposite to each other in the lateral direction X, specifically, the first constricted portion 31 and the first deformation-inducing portion 41, the second constricted portion 32 and the second deformation-inducing portion 42, and the third constricted portion 33 and the third deformation-inducing portion 43 are located at positions opposite to each other in the lateral direction, respectively.

The narrowed portion 30 of the first side edge portion 17 and the second side edge portion 18 also has an imaginary line K1-K3 extending linearly from the inner end 34 toward the longitudinal centerline P. The deformation inducing portions 40 of the absorber 20 are located on the imaginary line K1-K3. The virtual line K1-K3 is a line connecting the center O1 of the virtual arc C1 forming the curved inner end 34 of the constriction 30 and the center O2 of the virtual arc C2 forming the inner end 44 of the deformation-inducing portion 40.

When the sanitary napkin 10 is worn, for example, when the wearer is exercising, the wearer performs a relatively vigorous motion of running or jumping, and a force that twists the sanitary napkin 10 acts on the entire sanitary napkin 10. In this state, there is a difference in rigidity between the absorbent body 20, which is also referred to as semi-rigid, and the first side edge portion 17 and the second side edge portion 18, which are formed only of the sheet material, and thus distortion occurs in the vicinity of the boundary therebetween, and there is a possibility that the entire sanitary napkin 10 cannot follow the large movements of the body.

In the sanitary napkin 10 of the present embodiment, the constriction 30 located at the first side edge portion 17 and the second side edge portion 18 and the deformation-inducing portions 40 located at the both side portions of the absorbent member 20 are located at positions facing each other in the lateral direction X, and the deformation-inducing portions 40 are located on the imaginary line K1-K3 of the constriction 30, whereby even if a relatively large operation is performed by the wearer and a force that twists the entire sanitary napkin 10 acts on the entire sanitary napkin 10, the constriction 30 and the deformation-inducing portions 4 can be deformed at the same positions so as to absorb, cushion and interlock these forces. Specifically, the force for twisting can be absorbed and buffered by expanding or contracting the width dimension of the narrowing portion 30 and the deformation inducing portion 40 in an interlocking manner, or by moving a part of them up and down in some cases.

This can suppress the following: the sanitary napkin 10 does not follow the movement of the body, and the wearing feeling is impaired due to the first side edge portion 17, the second side edge portion 18, and a part of the absorbent body 20 being stretched, giving an uncomfortable feeling to the wearer, or a gap causing the side leakage of menstrual blood is generated between the sanitary napkin 10 and the body. Thus, the wearer can actively exercise or perform physical training without worrying about the side leakage of menstrual blood even when wearing the sanitary napkin 10.

When the constriction 30 of the first side edge portion 17 and the second side edge portion 18 and the deformation-inducing portion 40 of the absorber 20 are interlocked, a part of the deformation-inducing portion 40 may be located on the imaginary line K1-K3, but the imaginary line K1-K3 preferably intersects the inner end 44 of the deformation-inducing portion 40. In this case, the narrowed portion 30 and the deformation inducing portion 40 can be deformed in a better interlocking manner, and the force for twisting can be effectively absorbed and buffered.

The imaginary line K1-K3 of the narrowing portion 30 extends obliquely with respect to the longitudinal centerline P toward the transverse centerline Q. Since the virtual line K1-K3 obliquely crosses the longitudinal centerline P in a non-orthogonal manner, the forces absorbed and absorbed by the constriction 30 and the deformation inducing portions 40 located on the virtual line K1-K3 are released toward the center of the sanitary napkin 10, and the forces cancel each other out, thereby effectively suppressing other partial deformations.

Referring to fig. 2, the fixing region 50 extending in the longitudinal direction Y on the outer surface of the back sheet 12 does not overlap the narrowed portion 30 of the first side edge portion 17 and the second side edge portion 18 in a plan view. Since the constriction 30 is not fixed to underwear or the like via the fixing region 50, the vicinity of the constriction 30 becomes a movable region and is easily deformed, and a force for twisting the sanitary napkin 10 can be effectively absorbed and buffered.

The first constriction 31 and the first deformation-inducing portion 41 located at the position facing the first constriction intersect the first bend line 101, and the second constriction 32 and the second deformation-inducing portion 42 located at the position facing the second constriction intersect the second bend line 102. In this case, the first and second reduced

portions

31 and 32 and the first and second deformation-inducing

portions

41 and 42 are folded along the first and

second bending lines

101 and 102 to form a fold line in a state of being contained in a single package. Therefore, when worn, the first and second narrowed

portions

31 and 32 and the first and second deformation-inducing

portions

41 and 42 are easily bent and easily deformed, and thus easily follow the force of twisting.

Referring to fig. 3, the absorber 20 includes: an imaginary relative line K4 connecting the first narrowed portion 31 located at the first side edge 20c and the second narrowed portion 32 located at the second side edge 20 d; and an imaginary relative line K5 connecting the first narrowed portion 31 located at the second side edge 20d and the second narrowed portion 32 located at the first side edge 20 c. The imaginary relative lines K4, K5 each extend along a portion of the outer contour line of the narrowing 30. By providing the first and second narrowed

portions

31, 32 with this arrangement, even if a force that distorts the sanitary napkin 10 acts on the entire sanitary napkin 10, the force can be further damped by the first and second narrowed

portions

31, 32 located at the imaginary relative lines K4, K5.

The fixed region 50 (central fixed region 51) is located in the vicinity of the inner end 44 of the deformation inducing portion 40 of the absorber 20. Specifically, a part of the fixing region 50 and the inner end 44 of the deformation inducing portion 40 overlap each other in a plan view, and the overlapping portion has a size smaller than 25% of the dimension in the transverse direction X of the deformation inducing portion 40. When the wearer makes a violent movement and thus easily twists starting from the vicinity of the inner end 44 located on the center side of the sanitary napkin 10, a part of the inner end 44 is fixed via the fixing region 50, and thus wrinkles due to excessive twisting can be effectively prevented. Even when such a portion of the deformation-inducing portion 40 and a portion of the fastening region 50 overlap each other, the fastening region 50 located in the deformation-inducing portion 40 has a weaker fastening force to underwear or the like than the other portion of the fastening region 50 pressed against underwear or the like by the absorber 20 during wearing, and therefore, the movement of the absorber 20 is not hindered.

Preferably, the inner end 44 of the deformation inducing portion 40 of the absorber and the fixed region 50 (central fixed region 51) do not overlap each other in a plan view, and the fixed region 50 is located inward in the lateral direction X of the inner end 44. In this case, it can be said that the deformation of the deformation inducing portion is less likely to be inhibited than in the case where the inner end 44 of the deformation inducing portion 40 and a part of the fixing region 50 slightly overlap in a plan view.

The first narrowed portion 31 and the second narrowed portion 32 are located at the base end portions of the wing portions 19 located at positions opposite to each other in the longitudinal direction Y. The wing portions 19 are bent toward the back side along the bending line extending in the longitudinal direction Y, and are fixed to the back side of underwear or the like via the fixing regions 52. Since the first narrowed portion 31 and the second narrowed portion 32 are located at the base end portion of the wing portion 19, the wing portion 19 is easily deformed following the movement of underwear or the like when the wearer moves vigorously, and the release of the fixation by the side fixing region 52 can be suppressed. The proximal end portion of the wing portion 19 is a portion orthogonal to an imaginary line extending in the longitudinal direction Y along a part of the first side edge 20c (or the second side edge 20d) located outward in the longitudinal direction of the wing portion 19 and an imaginary line extending in the lateral direction X along the upper end edge (or the lower end edge) of the wing portion 19.

Intersections of the virtual lines of the narrowing portions 30, i.e., intersections P1, P2 of the first virtual lines K1, the second virtual lines K2, and the third virtual lines K3 are located outside in the longitudinal direction Y of the mid-high portion 21. Since the force after the absorption and buffering by the narrowing portion 30 is not directly applied to the middle-high portion 21 located in the region facing the vaginal opening when the force is released, the middle-high portion 21 can be prevented from being deformed and separated from the vaginal opening.

Unlike the illustrated example, the intersection point P1 of the first imaginary lines K1 and/or the intersection point P2 of the imaginary lines K2 may be located in the mid-high portion 21. In this case, the intersections P1 and P2 are preferably located in both ends of the curved shape of the mid-high portion 21. The intersections P1, P2 where the force released by the constriction 30 and the deformation inducing portion 40 is concentrated are located in both ends of the curve, and the force can be concentrated at the points while suppressing the force from being dispersed. In the case where the absorbent body 20 includes the third narrowing portion 33 and the third deformation inducing portion 43 opposed thereto, a part of the absorbent body 20 may be located outside the second imaginary line K2 in the transverse direction X. In this case, the third virtual line K3 can be a movable shaft for deforming the first side edge portion 17 and the second side edge portion 18 when a force is applied, instead of the second virtual line K2.

Referring to fig. 4, the constricted portion 30 and the deformation-inducing portion 40 are convex toward the inside in the lateral direction X, and the deformation-inducing portion 40 has a shape that curves more gently than the constricted portion 30. Specifically, the imaginary arc C1 forming the inner end 34 of the narrowing portion 30 is smaller than the imaginary arc C2 forming the inner end 44 of the deformation inducing portion 40 located at a position opposed thereto. The rigidity of the absorber 20 in which the deformation inducing portion 40 is located is higher than the rigidity of the first side edge portion 17 and the second side edge portion 18 in which the constricted portion 30 is located. Therefore, when the deformation-inducing portion 40 is relatively narrow in width, although the movable region may be small, the deformation-inducing portion 40 has a shape that is gently and largely curved more than the constricted portion 30, and therefore the degree of freedom of the movable region is increased, and deformation can be performed in conjunction with the constricted portion 30.

The deformation inducing portion 40 located opposite to the constricted portion 30 in the lateral direction X extends inward in the longitudinal direction Y of the constricted portion 30. In this case, when a force that twists the sanitary napkin 10 toward the center acts on both sides of the sanitary napkin 10, the deformation inducing portions 40 deform on the side closer to the center than the constricted portions 30, whereby the absorbent body 20 having high rigidity can be deformed in balance together with the both

side edge portions

17, 18.

Referring to fig. 5, an intersection angle α between a virtual vertical line T connecting the inner end 34 of the first narrowing portion 31 and the inner end 34 of the second narrowing portion 32 and the horizontal center line Q is 90 degrees or less. By setting the intersection angle α to 90 degrees or less, the portion on the second end edge portion 16 side located on the rear side of the crotch region of the wearer can be formed relatively wide. Since a garment such as underwear to which the sanitary napkin is fixed has a shape in which the area gradually increases from the front to the rear, the sanitary napkin 10 also has a shape in which the area at the rear is larger than the area at the front, and thus the force that deforms the sanitary napkin 10 received from the crotch of the wearer is uniformly received, and therefore the occurrence of wrinkles in the first constriction 31 and the second constriction 32 located at the base end portions of the wing portions 19 can be suppressed.

Further, the portion 46 of the first side edge 20c of the absorber 20, which is located further to the outside in the lateral direction X than the deformation inducing portion 40, is located further to the outside in the lateral direction X than the inner end 34 of the narrowing portion 30, and is located further to the outside in the lateral direction X than the side fixing region 52. Preferably, the second side edge portion 20d of the absorbent body 20 also has the same arrangement as the portion 46 of the first side edge portion 20c, and in this case, the width of the absorbent body 20 can be increased as much as possible, and side leakage of body fluid can be suppressed.

Referring to fig. 6, the fixing region 50 extending in the longitudinal direction Y does not intersect the constriction 30, and therefore the fixing region 50 is not located between the first constriction 31 and the second constriction 32. Therefore, the outer side in the lateral direction X of the middle-high portion 21 of the absorbent body 20 located between the first narrowing portion 31 and the second narrowing portion 32 of the base end portion of the wing portion 19 in the longitudinal direction Y is an unfixed region that is not fixed to the garment 60 such as underwear, and therefore is less likely to be pressed against the body of the wearer, and both sides of the middle-high portion 21 are divided into spaces 63 separated from the body. By forming the spaces 63 on both sides of the mid-high portion 21 in contact with the vaginal opening in this way, the narrowing portion 30 is easily and quickly moved up and down for relatively vigorous foot movements of the wearer, and the following ability is improved.

Description of the symbols

10 sanitary napkin (absorbent article)

11 surface sheet

12 Back sheet

20 absorbent body

20c first side edge (side edge of absorbent body)

20d second side edge (side edge of absorbent body)

17 first side edge part

18 second side edge part

19 wing part

30 narrowing part

31 first narrowing

32 second narrowing

33 third narrowing

34 inner end of the narrowing

40 deformation inducing part

41 first deformation inducing part

42 second deformation inducing part

43 third deformation inducing part

44 inner end of the deformation inducing portion

50 area of fixation

Imaginary line of K1

Imaginary line of K2

Imaginary line of K3

P1 intersection

P2 intersection

T longitudinal broken imaginary line

In the X transverse direction

Y longitudinal direction

Claims

1. An absorbent article having a longitudinal direction and a transverse direction and having a longitudinal centerline bisecting a dimension of the transverse direction, the absorbent article comprising: an absorbent article comprising a liquid-permeable topsheet, a non-liquid-permeable backsheet, and an absorbent body sandwiched between the topsheet,

further comprising a first side edge part and a second side edge part which are positioned outside both side edges of the absorbent body in the transverse direction,

the first side edge portion and the second side edge portion each have a narrowed portion extending inward in the lateral direction,

the narrowed portion at the first side edge portion and the narrowed portion at the second side edge portion are located at positions opposite to each other in the lateral direction,

the absorbent body has a pair of deformation inducing portions extending inward in the lateral direction from both side edges of the absorbent body,

the deformation inducing portion of the absorber is located on an imaginary line linearly extending from an inner end of the narrowing portion toward the longitudinal centerline.

2. The absorbent article according to claim 1,

the deformation inducing portion is a portion thinner than other portions in the absorbent body or a slit.

3. The absorbent article according to claim 1 or 2,

the narrowing portion extends obliquely with respect to the longitudinal centerline, and the imaginary line obliquely intersects the longitudinal centerline.

4. The absorbent article according to any one of claims 1 to 3,

a fixing region extending in the longitudinal direction is located on an outer surface of the back sheet, the fixing region not being located outside the longitudinal direction of the narrowing portion.

5. The absorbent article according to claim 4,

a part of the fixing region and an inner end of the deformation inducing portion overlap each other in a plan view, and the overlapping portion has a size smaller than 25% of a transverse dimension of the deformation inducing portion.

6. The absorbent article according to claim 4,

the inner end of the deformation inducing portion does not overlap the fixing region in plan view, and the fixing region is located on the inner side in the lateral direction of the inner end.

7. The absorbent article according to any one of claims 1 to 6,

the first side edge portion and the second side edge portion have: a wing part extending to the outer side of the transverse direction; and first and second narrow portions separated and opposed in the longitudinal direction, the first and second narrow portions being located at the base end portions of the wing portions, respectively.

8. The absorbent article of claim 7,

a middle-high portion of the absorbent body, which is thicker than the other portions, is located between the wing portions.

9. The absorbent article of claim 8,

an intersection of the imaginary line of the narrowed portion located at the first side edge portion and the imaginary line of the narrowed portion located at the second side edge portion, which is opposite to the narrowed portion in the lateral direction, is located outside the vertical direction of the mid-high portion.

10. The absorbent article according to any one of claims 1 to 9,

the constricted portion and the deformation-inducing portion are curved, and the deformation-inducing portion has a shape that is curved more gently than the constricted portion.

11. The absorbent article of claim 7,

and a transverse center line bisecting the dimension in the longitudinal direction, wherein an intersection angle between a virtual longitudinal-section line connecting the inner end of the first narrowing portion and the inner end of the second narrowing portion and the transverse center line is 90 degrees or less.

12. The absorbent article according to claims 1-11,

the deformation inducing portion located at a position opposite to the narrowed portion in the lateral direction extends inward in the longitudinal direction of the narrowed portion.

13. The absorbent article of claim 7,

the package further includes a first bending line and a second bending line extending in the transverse direction and formed in a state of being housed in a single package, the first narrowing portion and the deformation inducing portion located at a position facing the first narrowing portion intersect with the first bending line, and the second narrowing portion and the deformation inducing portion located at a position facing the second narrowing portion intersect with the second bending line.

14. The absorbent article according to claim 2,

the absorbent body has: a first side edge and a second side edge extending in the longitudinal direction, a first imaginary opposing line connecting the first narrowing portion at the first side edge and the second narrowing portion at the second side edge, and a second imaginary opposing line connecting the first narrowing portion at the second side edge and the second narrowing portion at the first side edge.

15. The absorbent article of claim 7,

an intersection of the imaginary line of the narrowed portion located at the first side edge portion and the imaginary line of the narrowed portion located at the second side edge portion opposite to the narrowed portion in the lateral direction is located in the middle height portion.