WO2022176291A1

WO2022176291A1 - Absorbent article

Info

Publication number: WO2022176291A1
Application number: PCT/JP2021/042342
Authority: WO
Inventors: 敦子長谷澤
Original assignee: 大王製紙株式会社
Priority date: 2021-02-22
Filing date: 2021-11-17
Publication date: 2022-08-25
Also published as: JP2022127823A; TW202233147A

Abstract

An absorbent article provided with an elongated body having a liquid-permeable surface sheet, a liquid-impermeable back sheet, and an absorber provided between the surface sheet and the back sheet, wherein linear compressed grooves extending in the longitudinal direction are provided on both sides of a center line extending in the longitudinal direction in at least a rear region to the rear of a region facing a body fluid discharge orifice of a wearer during wear.

Description

absorbent article

The present invention relates to absorbent articles.

Conventionally, as absorbent articles such as sanitary napkins, panty liners, and incontinence pads, there have been known ones in which an absorbent body is provided between a liquid-permeable topsheet and a liquid-impermeable backsheet. In such absorbent articles, it is known to use fibers that improve the strength of the absorbent body in order to prevent twisting.

For example, in Patent Document 1, a first portion containing thermoplastic resin fibers and cellulose-based water-absorbent fibers, at least a portion of which is exposed to the liquid-permeable layer-side surface of the absorbent body. and a second portion exposed to the liquid impermeable layer side surface of the absorbent body, and a connecting portion connecting the first portion and the second portion. ing. Further, it is disclosed that embossments are provided in the center of the absorbent body in order to firmly connect the fibers.

JP 2015-16296 A

Patent Document 1 describes that the strength of the absorber is improved and the absorber is less likely to twist due to the disclosed configuration.

However, in the absorbent article described in Patent Document 1, when worn for a long time due to a small amount of menstrual blood and urination, force is applied from both ends in the width direction in a direction to close the grooves of both legs and buttocks. , the twist toward the centerline has not been considered. Such twisting toward the center line tends to occur especially in the rear part facing the buttocks when worn for a long time.

In view of the above points, an object of one aspect of the present invention is to provide an absorbent article that can suppress twisting even when worn for a long time.

A first embodiment of the present invention provides an elongated main body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body provided between the topsheet and the backsheet. linearly extending longitudinally on both sides of the longitudinally extending center line at least in the rear region behind the region facing the bodily fluid outlet of the wearer when worn of pressing grooves are provided.

According to the first aspect, at least in the rear region where twisting tends to occur due to the force in the direction of closing the wearer's buttocks when worn, linear compression grooves extending in the longitudinal direction are provided at least on both sides of the center line. ing. Therefore, when force is applied from both ends in the longitudinal direction toward the center line, the absorbent article can be bent along the compressed grooves, so that the region near the center line can be deformed in the width direction. . As a result, it is possible to absorb the external force that causes twisting and suppress twisting.

In a second aspect of the present invention, the compressed groove is provided in a region facing the bodily fluid outlet.

According to the second embodiment, since the compressed groove is provided in the central region facing the bodily fluid outlet, twisting of the central region as well as the rear region, which is likely to occur due to the force in the direction of closing the wearer's legs when worn, is provided. can be suppressed.

In a third form of the present invention, the backsheet is provided with a non-slip portion for fixing the absorbent article to the underwear, and the non-slip portion is located in a region of the backsheet excluding the projection surface of the compressed grooves. is provided.

According to the third embodiment, the anti-slip portion is provided in the area excluding the projection surface of the compressed grooves of the back sheet, in other words, it is not provided on the projected surface of the compressed grooves of the back sheet. Therefore, even if the region provided with the compressed grooves is bent, the region where the compressed grooves are not provided can be fixed to the underwear, and the absorbent article can be prevented from slipping.

According to a fourth aspect of the present invention, the anti-slip portion is arranged closer to the end portion side in the width direction of the absorbent article than each of the compressed grooves.

According to the fourth aspect, both sides of the compressed groove in the width direction can be fixed to the underwear, and the absorbent article can be deformed more smoothly in the width direction.

A fifth form of the present invention comprises a pair of longitudinally extending outer compression grooves, said compression grooves being located closer to said centerline than said respective outer compression grooves.

According to the fifth aspect, by providing the compressed grooves inside the outer compressed grooves, body fluid can be drawn in by the outer compressed grooves and guided in the longitudinal direction, and the compressed grooves can be used to extend the absorbent article. It can suppress twisting.

According to one aspect of the present invention, it is possible to provide an absorbent article that can suppress twisting even when worn for a long time.

1 is a partially broken plan view of an absorbent article according to a first embodiment; FIG. FIG. 2 is a sectional view taken along line II of FIG. 1; FIG. 2 is a schematic diagram for explaining the first movement of the II cross section of FIG. 1; FIG. 2 is a schematic diagram for explaining the second movement of the II cross section of FIG. 1; [ Fig. 10] Fig. 10 is a plan view showing a first modified example of linear compressed grooves of the absorbent article according to the first embodiment. FIG. 6 is a schematic diagram for explaining the first movement of the II-II section of FIG. 5; FIG. 6 is a schematic diagram for explaining the second movement of the II-II cross section of FIG. 5; FIG. 11 is a plan view showing a second modification of the linear compressed grooves of the absorbent article according to the first embodiment; FIG. 9 is a schematic diagram for explaining the first movement of the III-III section of FIG. 8; FIG. 9 is a schematic diagram for explaining the second movement of the III-III section of FIG. 8; FIG. 11 is a plan view showing a third modification of the linear compressed grooves of the absorbent article according to the first embodiment; FIG. 12 is a schematic diagram for explaining the first movement of the IV-IV cross section of FIG. 11; FIG. 12 is a schematic diagram for explaining the second movement of the IV-IV cross section of FIG. 11; FIG. 4 is a plan view showing a modification of the anti-slip portion of the absorbent article according to the first embodiment; Fig. 2 is a partially cutaway plan view of an absorbent article according to a second embodiment;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, unless there is a particular description, the same reference numerals may be attached to the same or corresponding configurations, and the description thereof may be omitted.

<First Embodiment>
FIG. 1 is a partially broken plan view of an absorbent article 1 according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II of FIG. As shown in FIGS. 1 and 2, an absorbent article 1 comprises a liquid-impermeable backsheet 2, a liquid-permeable topsheet 3, and an absorbent body 4 provided between these

sheets

2 and 3. a body having a In order to retain the shape of the absorbent body 4, the absorbent body 4 may be wrapped with a wrapping sheet (not shown) made of crepe paper, non-woven fabric, or the like. When using the absorbent article 1, the absorbent article 1 is worn so that the back sheet 2 side of the absorbent article 1 is fixed to underwear such as shorts, and the top sheet 3 side faces the skin.

The absorbent article body as a whole has a predetermined length in the longitudinal direction (first direction D1 in the drawing) and a predetermined width in the width direction (second direction D2 in the drawing) orthogonal to the longitudinal direction. It has an elongated shape (elongated shape) with Although the width of the absorbent article main body is substantially constant in the illustrated example, it may vary over the longitudinal direction D1. The absorbent article main body may have a shape and structure substantially symmetrical with respect to a centerline extending in the longitudinal direction (longitudinal centerline) CL. Also, it may have an asymmetrical shape and structure as long as the predetermined effects of the embodiment are achieved.

In addition, the absorbent article 1 has a region (body fluid discharge port corresponding region) 50 corresponding to a body fluid discharge port such as a blood discharge port and a urination port of the wearer when the absorbent article 1 is worn. The absorbent article 1 has a central region M including the bodily fluid outlet corresponding region 50 , a front region F in front of the central region M, and a rear region R behind the central region M. The central region M may be a region that roughly corresponds to the crotch region from the urination opening to the anus of the wearer when worn. The rear region R is a region corresponding to the groove of the wearer's buttocks, specifically, a region extending in the front-rear direction including a portion corresponding to the groove of the wearer's buttocks (region corresponding to the buttock groove). The rear region R can be said to be a region covering the entire gluteal cleft, or a region from the rear of the perineum or the vicinity of the anus to the vicinity of the lower end of the tailbone. The front end of the rear region R can be positioned approximately 110 to 170 mm rearward from the front end of the absorbent article 1 and approximately 30 to 60 mm rearward from the body fluid outlet corresponding region 50 .

In FIG. 1, this embodiment is shown such that the length of the front region F and the length of the rear region R are approximately the same, but the length of the rear region R is longer than the length of the front region F. The length of the front region F may be longer than the length of the rear region R.

The total length of the absorbent article 1 is preferably 140-360 mm, more preferably 230-270 mm, and even more preferably 240-260 mm. The longitudinal length of the rear region R can be 70 to 250 mm.

At the front and rear edge portions of the absorber 4, the outer edges of the back sheet 2 and the top sheet 3 are joined by adhesive such as hot melt, heat sealing, ultrasonic sealing or other bonding means.

As the back sheet 2, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. A laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which a waterproof film is interposed to substantially ensure liquid impermeability can be used. Moreover, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such water-impervious/moisture-permeable sheet materials are produced by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. Porous sheets can be used.

The surface sheet 3 is a liquid-permeable sheet that allows bodily fluids such as menstrual blood, vaginal discharge, and urine to quickly pass through. As the surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton. It can be used in combination of two or more. Examples of nonwoven fabric processing methods include spunlace, spunbond, thermal bond, meltblown, needle punch, and the like. Among these processing methods, the spunlace method is preferable because it can produce a soft nonwoven fabric, the spunbond method is preferable because it can produce a nonwoven fabric with excellent drapeability, and the thermal bonding method is preferable because it can produce a bulky and soft nonwoven fabric. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc. can be used in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath.

The absorbent body 4 interposed between the back sheet 2 and the top sheet 3 is not limited as long as it can absorb and retain bodily fluids, but it preferably contains flocculent pulp and a water-absorbent polymer. As the water absorbent polymer, super absorbent polymer granule powder (SAP), super absorbent polymer fiber (SAF) and combinations thereof can be used. The pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Broad-leaved trees, softwoods, and the like are used as raw materials for chemical pulp, and softwoods are preferably used because of their long fiber length.

Synthetic fibers may also be mixed in the absorber 4. As synthetic fibers, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. can also be used. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath, can also be used. It is also possible to use hydrophobic fibers surface-treated with a hydrophilizing agent to impart affinity to body fluids.

The thickness of the absorbent body 4 can be in the range of 2.0 to 25 mm, preferably in the range of 5.0 to 10.0 mm. The absorbent body 4 does not have to have a uniform thickness over the front surface, and may have a structure in which the region 50 corresponding to the body fluid outlet, the region in the vicinity thereof, and the central portion in the width direction of the rear region are swollen. Moreover, the absorbent body 4 is preferably manufactured by a stacking or air-laid method.

Although the illustrated embodiment exemplifies the absorbent article 1 without side nonwoven fabrics, side nonwoven fabrics may be provided along the longitudinal direction D1 on both sides of the main body on the side of the topsheet 3. The side non-woven fabric and the backsheet 2 may be joined by the above-described adhesive means, thereby forming wings extending laterally of the main body.

A water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used as the side nonwoven fabric. For example, in order to improve the effect of preventing permeation of menstrual blood, vaginal discharge, and the like, or to improve the texture, it is preferable to use a water-repellent nonwoven fabric coated with a silicon-based or paraffin-based water repellent agent. In order to increase the absorption of menstrual blood and the like in the wing, it is preferable to use a hydrophilically treated nonwoven fabric as the material of the nonwoven fabric. As the type of nonwoven fabric, an air-through nonwoven fabric that is soft and resistant to creases and wrinkles is preferable.

The main body of the absorbent article 1 of this embodiment is provided with a plurality of compressed grooves (also referred to as compressed grooves or embossments). The compressed grooves are formed as grooves recessed from the top sheet 3 toward the back sheet 2 side. The compressed grooves may be formed in line symmetry with the longitudinal center line CL of the absorbent article 1 as a line of symmetry in plan view. The compressed grooves can be formed by passing a laminate obtained by laminating the surface sheet 3 on the absorbent body 4 between a pair of pressure rolls. For example, a convex roll and a flat roll can be arranged on the surface sheet 3 side and the absorbent body 4 side of the laminate, and pressure can be applied from both rolls.

As shown in FIG. 1, the absorbent article 1 of this embodiment is provided with a pair of

compressed grooves

10, 10 extending in the longitudinal direction D1 on both sides of the center line CL. As will be described later, the

compressed grooves

10, 10 are preferably linear compressed grooves (linear compressed grooves) because they can have a function of suppressing twisting. It is preferable that the pair of linear

compressed grooves

10, 10 be provided near the center line CL, for example, within a range of 15 mm at maximum in the width direction D2 from the center line CL. In this embodiment, the linear

compressed grooves

10, 10 are provided over the front region F, the central region M, and the rear region R, but are provided only in the rear region R or from the rear region R to the central region M. may have been In this embodiment, the number of linear

compressed grooves

10, 10 is two, but the number is not limited to two as long as they are arranged on both sides of the center line CL. may be placed in The width of the linear

compressed grooves

10, 10 can be arbitrarily set, and can be appropriately changed, for example, in consideration of the above-mentioned area near the center line CL or the number of the linear

compressed grooves

10, 10.

Furthermore, the absorbent article 1 is provided with a pair of outer

compressed grooves

11, 11 extending in the longitudinal direction on both sides of the center line CL across the front region F, the central region M, and the rear region R. there is The outer

compressed grooves

11, 11 are arranged at positions farther from the center line CL toward both end portions in the width direction D2 than the linear

compressed grooves

10, 10 are. In other words, the linear

compressed grooves

10, 10 are arranged closer to the center line CL than the outer

compressed grooves

11, 11, respectively.

The outer

compressed grooves

11, 11 have the function of drawing in body fluid and guiding it in the longitudinal direction D1. During normal use of the absorbent article 1, body fluids are discharged directly to the central region M including the region 50 corresponding to the body fluid outlet. Part of the bodily fluid received in the central region M is absorbed by the absorbent body 4 through the surface sheet 3 at the position where it is received, but part of the body fluid may diffuse and migrate in the absorbent body 4 in the planar direction. . During diffusion, body fluids can be guided in the longitudinal direction D1 along the outer

compressed grooves

11, 11 of the absorbent body 4, where the density is increased. Therefore, in the absorbent article 1 of this embodiment, the outer

compressed grooves

11, 11 can draw bodily fluids and guide them in the longitudinal direction D1, and the straight

compressed grooves

10, 10 can suppress twisting.

The outer compressed groove 11 preferably has a low compressed portion and a high compressed portion formed to have a recess deeper than the low compressed portion. The high compression portion may be formed at the location shown in black in FIG. The presence of the high compression portion is preferable because the function of drawing in and guiding body fluid can be enhanced. The straight

compressed grooves

10, 10 also have the function of drawing body fluid and guiding it in the longitudinal direction D1.

Anti-slip portions 12 for fixing the absorbent article 1 to the underwear during wearing are provided in a front area F, a central area M, and a rear area R on the surface (non-skin surface side) of the back sheet 2 facing the underwear. , two on each side of the center line CL. The anti-slip portion 12 is preferably made of an adhesive layer. As shown in FIGS. 1 and 2, the anti-slip portion 12 is provided in a region excluding the projected planes of the linear

compressed grooves

10,10. In other words, the anti-slip portion 12 is not provided on the projected plane of the linear

compressed grooves

10 , 10 . Specifically, the anti-slip portions 12 are arranged on the both end side in the width direction D2 of the linear compression grooves 10 . The anti-slip portions 12 may be arranged as described above, and the number, shape, and size are not limited to those illustrated.

Next, the twist suppression function of the straight compressed grooves 10 will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a schematic diagram for explaining the first movement of the II section of FIG. FIG. 4 is a schematic diagram for explaining the second movement of the II cross section of FIG. In addition, in FIG.3 and FIG.4, the back sheet 2, the surface sheet 3, and the outer compression groove 11 are abbreviate|omitted for description. Also, although the thickness of the anti-slip portion 12 is shown to be larger than the thickness of the absorber 4, it does not reflect the actual thickness.

As shown in FIGS. 3 and 4, when the absorbent article 1 is worn, a force F in the direction of closing the groove of the wearer's buttocks, in other words, both ends in the width direction D2 is applied to the rear region R of the absorbent article 1. A force directed toward the center line CL from the side may be applied to the absorbent article 1 in some cases. In this case, the absorbent article 1 can be bent toward the skin side (Fig. 3) or the non-skin side (underwear side) (Fig. 4) along the straight

compressed grooves

10, 10, so A region can be deformed in the width direction. As a result, the external force F that causes twisting can be absorbed, and twisting can be suppressed. The thickness of the absorbent body 4 and the width of the linear compression grooves 10 determine whether the absorbent article 1 should be bent to the skin side (Fig. 3) or the non-skin side (underwear side) (Fig. 4). etc. will change.

By deforming the area near the center line in the width direction, the overall width of the attached absorbent article 1 is correspondingly reduced, and the width appears to shrink in plan view. Therefore, the range that can be deformed when a force that causes twisting is applied is narrowed, so the degree of twisting can be reduced accordingly.

When the absorber 4 is thick, the central portion of the absorber 4 between the linear compressed grooves 10 tends to swell as shown in FIG. For this reason, as schematically shown in FIG. 3, when a force F is applied from both legs, the portion between the straight

compressed grooves

10, 10 cannot be bent in the direction in which the bulging becomes smaller, and the bulging becomes even greater. It becomes easy to transform so that it swells. For this reason, the absorbent body 4 tends to bend so that the central portion swells upward (toward the skin surface).

On the other hand, when the thickness of the absorbent body 4 is relatively thin, the swelling in the central portion of the absorbent body 4 between the linear

compressed grooves

10, 10 shown in FIG. 2 is small. Then, as schematically shown in FIG. 4, when a force F is applied from both legs, the absorber 4 tends to bend in a direction in which the width of the straight compressed grooves 10 becomes larger. Therefore, it is easy to bend such that the center portion drops downward (non-skin surface side) (the center portion swells).

When the amount of bodily fluid discharged is small, the absorbent article 1 with a relatively thin absorbent body 4 is often used, so the central portion often swells downward as shown in FIG. Even when the thin absorbent article 1 is worn, if it is desired to deform the central portion so that it swells upward, it is possible to preliminarily add a slight peculiarity in the direction in which the absorbent article 1 is worn. , it can be easily raised to the top during long-term use.

From the viewpoint of deforming the central portion as much as possible, the compressed grooves 10 are preferably straight lines. If it is not a straight line, the degree of swelling in the central portion shown in FIG. This is because the sizes may differ. However, even if the

compressed grooves

10, 10 include a slight curved line, they can be treated as straight lines as long as they can be deformed in the same way.

In addition, it is preferable that the

compressed grooves

10, 10 are straight lines in view of the relationship with the anti-slippage 12, which will be described later.

As described above, by forming the linear

compressed grooves

10 , 10 , when the wearer wears the absorbent article 1 , it is possible to suppress twisting due to the force received from the legs by bending the central portion of the absorbent body. can. In addition, twisting can be suppressed by increasing the rigidity of the central portion by bending the central portion.

Since twisting is particularly likely to occur in the rear region R facing the wearer's buttocks when worn, the straight

compressed grooves

10, 10 are provided at least in the rear region R from the viewpoint of twisting prevention. Furthermore, it is preferable that the central region M facing the bodily fluid outlet is also extended. When the absorbent article 1 is worn, the force F in the direction of closing the legs of the wearer in the central region M of the absorbent article 1, in other words, the force directed from both ends in the width direction D2 toward the center line CL is the absorbent article. It may take 1. In this case, similarly to the movement of the rear region R shown in FIGS. Since it can be bent toward the face side (undergarment side) (FIG. 4), the region near the center line CL can be deformed (contracted) in the width direction. As a result, along with the rear region R, twisting of the central region M, which tends to occur due to a force in the direction in which the wearer's legs are closed when worn, can be suppressed.

In addition, since the anti-slip portion 12 is provided in an area excluding the projection plane of the linear

compressed grooves

10, 10, the area near the center line CL where the linear

compressed grooves

10, 10 are provided is shown in FIGS. Even if it is bent as shown in 4, it is possible to fix the area where the linear

compressed grooves

10, 10 are not provided to the underwear. Therefore, it is possible to prevent the absorbent article 1 from shifting with respect to the underwear.

Furthermore, since the anti-slipping portions 12 are arranged closer to the ends in the width direction D2 of the absorbent article 1 than each of the linear compressed grooves 10, both sides of the linear compressed grooves 10 in the width direction D2 are securely attached to the underwear. 3 and 4, the absorbent article 1 can be more smoothly deformed in the width direction D2.

Normally, the anti-slip portion 12 is formed linearly. Therefore, the compressed grooves 10 are also preferably linear. This is because if the anti-slip portion 12 is linear and the compressed groove 10 is curved, the deformation of the compressed groove 10 tends to be irregular due to the anti-slip portion 12 .

(Modified example of linear compression groove)
FIGS. 5, 8 and 11 show first, second and third modifications of the linear compressed grooves 10 of the absorbent article 1 according to the first embodiment of the present invention. 6 is a schematic diagram for explaining the first movement of the II-II section of FIG. 5, and FIG. 7 is a schematic diagram for explaining the second movement of the II-II section of FIG. be. 9 is a schematic diagram for explaining the first movement of the III-III cross section of FIG. 8, and FIG. 10 is a schematic diagram for explaining the second movement of the III-III cross section of FIG. be. 12 is a schematic diagram for explaining the first movement on the IV-IV cross section of FIG. 11, and FIG. 13 is a schematic diagram for explaining the second movement on the IV-IV cross section of FIG. be.

The modification shown in FIG. 5 differs from the example shown in FIG. 1 in that the number of linear compression grooves 10 is three. The linear

compressed grooves

10, 10, 10 extending in the longitudinal direction D1 are arranged one on the center line CL and one on each side of the center line CL. The configuration other than the straight

compressed grooves

10, 10, 10 is the same as the example shown in FIG.

In the modification shown in FIG. 5 as well, when the absorber 4 is thick, the bulge at the central portion is large. Therefore, as schematically shown in FIG. Easy to deform. On the other hand, when the thickness of the absorbent body is relatively thin, the swelling in the central portion is small. Therefore, as schematically shown in FIG. It becomes easy to bend in the direction where the width becomes larger. Therefore, it becomes easy to bend such that the central portion falls downward (the central portion swells).

The modified example shown in FIG. 8 differs from the example shown in FIG. 1 in that the number of linear compressed grooves 10 is four. Two linear

compressed grooves

10, 10, 10, 10 extending in the longitudinal direction D1 are arranged on both sides of the center line CL. The configuration other than the linear

compressed grooves

10, 10, 10, 10 is the same as the example shown in FIG.

Also in the modification shown in FIG. 8, when the absorber 4 is thick, the center portion tends to swell upward as schematically shown in FIG. Also, when the thickness of the absorbent body 4 is relatively thin, as schematically shown in FIG. 10, it tends to swell downward.

The modification shown in FIG. 11 differs from the example shown in FIG. 1 in that the number of linear compression grooves 10 is five. The linear

compressed grooves

10, 10, 10, 10, 10 extending in the longitudinal direction D1 are arranged one on the center line CL and two on both sides of the center line CL. The configuration other than the linear

compressed grooves

10, 10, 10, 10, 10 is the same as the example shown in FIG.

In the modification shown in FIG. 11, since the number of linear compressed grooves is large, the bending of the central portion is also complicatedly related to the thickness of the absorbent body 4 .

When the thickness of the absorbent body 4 is thick, as shown in FIG. The straight compressed grooves 10 prevent the central portion from bending downward, and tend to bend almost as schematically shown in FIG. However, as the thickness of the absorbent body 4 is reduced, the influence of the central linear compressed groove 10 becomes greater than the influence of the bulge in the central portion, and as schematically shown in FIG. 12, the central portion may be bent downward. Possible.

Also, when the thickness of the absorbent body 4 is relatively thin, as schematically shown in FIG. 13, it tends to swell downward. In addition, there may be a case in which bending as shown in FIG. 10 occurs.

In any of the above-described cases, the plurality of linear compressed grooves 10 formed in the central portion make the absorbent body 4 in the central portion easy to bend. It is possible to suppress the twisting of the absorbent body 4 which is likely to be caused by the force F in the direction of closing the cover.

(Modified example of anti-slip portion)
FIG. 14 shows a modified example of the anti-slip portion 12 of the absorbent article 1 according to the first embodiment of the present invention. In the modification shown in FIG. 14, the number and width of the anti-slip portions 12 are different from those in the example shown in FIG. As for the

anti-slip portions

12, 12, the anti-slip portions 12 having a width larger than that of the example shown in FIG. The configuration other than the

anti-slip portions

12, 12 is the same as the example shown in FIG. The

anti-slip portions

12, 12 of the example shown in FIG. 14 can secure a large contact area with the underwear, and even if the areas where the linear

compressed grooves

10, 10 are provided are bent, the linear

compressed grooves

10, 10 It is possible to firmly fix the area where is not provided with the underwear. Therefore, it is possible to more reliably prevent the absorbent article 1 from shifting with respect to the underwear.

<Second embodiment>
FIG. 15 is a partially broken plan view of an absorbent article 601 according to a second embodiment of the present invention. The absorbent article 601 according to the second embodiment differs from the absorbent article 1 according to the first embodiment in that it has wings W, W, and in the configuration of the linear

compressed grooves

610, 610, 610, 610, 610. different in The absorbent article 601 of this embodiment has wings W, W extending from both sides of the central region M for securely fixing the absorbent article 601 to underwear when worn. The front region F may be a region from the starting point on the front of the wing W to the front edge, and the rear region R may be the region from the starting point on the rear of the wing W to the rear edge. In addition, when wings W are provided, the center of the region 650 corresponding to the body fluid outlet is the position of the midpoint of the length of the side edge of the wings W, or the position of the wing when viewed in the longitudinal direction. It can be positioned at the middle point between the front base point and the rear base point of W, W.

In addition, side

nonwoven fabrics

607, 607 are provided along the longitudinal direction D1 on both sides of the main body 608 on the side of the surface sheet 603. The side

non-woven fabrics

607, 607 and the backsheet 602 are joined by an adhesive means, whereby the wings W, W may be formed.

Although the absorbent article 601 has the wings W, W in the second embodiment, it may have no wings W, W. In that case, when the wings W are formed at the positions where the wings W are conventionally formed, the front region from the starting point of the front of the wings W is defined as the front region F, and the rear of the wings W is defined as the front region F. A rear region R can be defined as a region behind the starting point of .

The absorbent article 601 of the present embodiment has five linear

compressed grooves

610, 610, 610, 610, 610 extending in the longitudinal direction D1 on the center line CL and on both sides of the center line CL, respectively. It is provided only in the rear region R. According to the present embodiment, the same effect as the first embodiment can be obtained, and twist can be suppressed. In particular, the absorbent article 601 of this embodiment has wings W, W, so that the central region M can be firmly fixed to the underwear, and the central region M is less likely to be twisted. By providing the linear

compressed grooves

610, 610, 610, 610, 610, twisting of the rear region R can be suppressed. In addition, the linear

compressed grooves

610, 610, 610, 610, 610 may be provided in the central region M or from the central region M to the front region F. In addition, the number and width of the linear

compressed grooves

610, 610, 610, 610, 610 are not limited to the form shown in FIG. not good

In addition, the structure of the outer compressed groove 611 and the anti-slip portion 612 is the same as that of the absorbent article 1 according to the first embodiment, and the same function as the outer compressed groove 11 and the anti-slip portion 12 according to the first embodiment. effect is obtained.

Although the embodiment has been described as above, the above embodiment is presented as an example, and the present invention is not limited by the above embodiment. The above embodiments can be implemented in various other forms, and various combinations, omissions, replacements, changes, etc. can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

This international application claims priority based on Japanese Patent Application No. 2021-026020 filed on February 22, 2021, and the entire contents of No. 2021-026020 are hereby incorporated into this international application.

1, 201, 301, 401, 501, 601

Absorbent article

2, 602

Back sheet

3, 603

Top sheet

4, 604 Absorbent body 607 Side nonwoven fabric 608 Main body (absorbent article main body)
10, 610 compression groove (linear compression groove)
11, 611 outer

compressed grooves

12, 612

anti-slip portions

50, 650 bodily fluid outlet corresponding region CL longitudinal centerline F front region M central region R rear region D1 first direction (longitudinal direction)
D2 Second direction (width direction)
W Wing

Claims

An absorbent article comprising an elongated main body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body provided between the topsheet and the backsheet,
At least in the rear area behind the area facing the bodily fluid outlet of the wearer when worn, linear compression grooves extending in the longitudinal direction are provided on both sides of the center line extending in the longitudinal direction. absorbent article.
The absorbent article according to claim 1, wherein the compressed groove is provided in a region facing the bodily fluid outlet.
The back sheet is provided with a non-slip portion for fixing the absorbent article to the underwear,
The absorbent article according to claim 1 or 2, wherein the anti-slip portion is provided in a region of the backsheet excluding a projection surface of the compressed grooves.
The absorbent article according to claim 3, wherein the anti-slip portion is arranged closer to the end portion side in the width direction of the absorbent article than each of the compressed grooves.
comprising a pair of longitudinally extending outer squeeze grooves;
5. The absorbent article according to any one of claims 1 to 4, wherein said compressed grooves are arranged closer to said centerline than said respective outer compressed grooves.