JP2009125485A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article wherein a skin-fitting face in a middle part in a width direction of an absorbent body easily stick to an excretory site of a user, an excreted body fluid is rapidly absorbed in the absorbent body, twist is hardly generated in the side of the absorbent main body, and an excretion hardly leaks from the side. <P>SOLUTION: An absorbent article 1 has a vertically long absorbent main body 10 which is equipped with a surface sheet 2 forming the skin-fitting face, a rear surface sheet 3 forming a non-skin-fitting face, and a vertically long absorber 4 located between both sheets 2 and 3. In at least an excretory site-countering part A of the absorbent main body 10, a pair of side parts 41 and 41 in the absorber 4 is more strongly compressed than a middle part 42 in the width direction located amidst the pair of the side parts 41 and 41, thereby they form a pair of high-compression areas P. The high-compression areas P are formed to outer ends 43 in the width direction of the absorber 4 but not formed to front and rear ends 44 and 45 in a longitudinal direction of the absorber 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), and an incontinence pad.

  Absorbent articles such as sanitary napkins generally include a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and a vertically long absorbent body disposed between both sheets. It has a vertically long absorbent body. In such an absorbent article, the skin contact surface side of the central part in the width direction of the absorbent main body is closely attached to the excretion part of the wearer, and the excreted body fluid is quickly absorbed into the absorbent main body, and It is desired to prevent twisting at the side of the absorbent main body and to prevent side leakage.

  For example, a configuration in which the skin contact surface side in the center in the width direction of the absorbent main body easily adheres to the excretion part of the wearer is likely to be raised on the skin contact surface side in the center in the width direction of the absorbent main body (for example, the following) Patent Document 1) and a configuration in which the skin contact surface side of the central portion in the width direction of the absorbent main body is higher than the side portion (so-called medium-high structure) (see, for example, Patent Documents 2 and 3 below).

JP 2004-154153 A JP 2003-33397 A JP-A-10-323368

  However, in the absorbent article described in Patent Document 1, the central portion in the width direction of the absorbent main body is easily raised by providing a compressed groove between the central portion in the width direction and the side portion of the absorbent main body. However, the sides of the absorber are not substantially compressed. Therefore, the rigidity of the side part of the absorbent main body is low, and the side part of the absorbent main body is likely to be twisted, so that side leakage is likely to occur. Moreover, the center part of the width direction of an absorptive main body does not rise easily depending on the shape of a pressing groove.

Moreover, in the absorbent article described in Patent Document 2, the central portion in the width direction of the absorber is relatively higher than the side portions by providing a large number of embossed recesses in the side portions of the absorber. . For this reason, the rigidity of the side portion of the absorbent main body is not sufficient, and the side portion of the absorbent main body is likely to be twisted, so that side leakage is likely to occur.
In the absorbent article described in Patent Document 3, the side part of the absorbent body is compressed to the front and rear end parts in the longitudinal direction, and the rigidity is high. Therefore, the central part in the width direction of the medium-high structure is unlikely to rise.

  Therefore, the object of the present invention is to make the skin contact surface side of the central part in the width direction of the absorbent main body easy to adhere to the excretion part of the wearer, and to quickly absorb the excreted body fluid into the absorbent main body. It is an object of the present invention to provide an absorbent article that is less likely to be twisted at the side portions thereof and is less likely to cause side leakage.

  The present invention is a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber disposed between both sheets, The pair of side parts of the absorbent body in at least the excretory part facing part of the absorbent article is compressed more than the center part in the width direction located between the side parts, thereby forming a pair of high compression regions. The high compression region achieves the above object by providing an absorbent article that is not formed up to the longitudinal front and rear ends of the absorbent body.

  According to the absorbent article of the present invention, the skin contact surface side of the central part in the width direction of the absorbent main body is easily adhered to the excretion part of the wearer, and the excreted body fluid can be quickly absorbed into the absorbent main body and absorbed. The side of the sexual body is less likely to be twisted and side leakage is less likely to occur.

Hereinafter, the absorbent article of the present invention will be described based on a first embodiment which is a preferred embodiment thereof with reference to the drawings.
In the first embodiment, the absorbent article of the present invention is applied to a sanitary napkin. As shown in FIGS. 1 and 2, a surface sheet 2 that forms a skin contact surface and a non-skin contact surface are formed. And a vertically long absorbent main body 10 having a vertically long absorbent body 4 interposed between both sheets 2 and 3. The absorber 4 has a single layer structure as shown in FIG. 2 and FIG.

  In at least the excretory part facing part A of the absorbent main body 10, as shown in FIGS. 1, 2, and 3 (a), the pair of side parts 41, 41 of the absorbent body 4 is A pair of high compression regions P are formed by being compressed more than the widthwise central portion 42 located between them. The high compression region P is formed up to the outer end portions 43 and 43 in the width direction of the absorbent body 4, and is not formed up to the front end portion 44 and the rear end portion 45 in the longitudinal direction of the absorbent body 4. In other words, the high compression region P reaches the side edge in the longitudinal direction of the absorbent body 4, but does not reach the front and rear edge in the longitudinal direction of the absorbent body 4.

  As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the first embodiment has an absorbent main body 10 and a pair extending outward in the width direction from both side portions of the absorbent main body 10. The wings 5 and 5, and a pair of side leakage preventing parts 6 and 6 that respectively cover the skin contact surface side of both sides of the absorbent main body 10.

  In addition, in this specification, the "skin contact surface side" is the side (surface) arranged on the wearer's skin side when wearing, out of the front and back both sides (surface) of each member such as the absorbent main body 10 and the like. is there. The “non-skin contact surface side” is the opposite side (surface) of the skin contact surface side. Unless otherwise specified, the “longitudinal direction” is a direction along the longitudinal direction of the vertically long absorbent main body 10 or the absorbent body 4, and the “width direction” is the direction of the vertically long absorbent main body 10 or the absorbent body 4. It is a direction along the width direction.

Moreover, in the absorptive main body 10, "excretion part opposing part A" is a part (area | region) facing a wearer's excretion part, as shown in FIG. 1, and the wing part 5 like 1st Embodiment. In the absorbent article which has, it is a part which has the wing part 5 in both sides. Moreover, in the absorbent article which does not have a wing part, it is a part which opposes an absorptive main body and a wearer's excretion part, and is an area | region which has a range about 70 mm in a longitudinal direction in the center part of an absorbent article.
A portion (region) positioned in front of the excretion portion facing portion A is referred to as “front portion B”, and a portion (region) positioned in the rear of the excretion portion facing portion A is referred to as “rear portion C”.

  The sanitary napkin 1 of the first embodiment will be further described in detail. As shown in FIGS. 1 and 2, the absorbent main body 10 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid retaining property disposed between both sheets 2 and 3. The absorber 4 is provided. The absorber 4 has a substantially rectangular shape in which the front end portion 44 and the rear end portion 45 are rounded in plan view, and the width direction outer end portion 43 is linear.

  As shown in FIGS. 1 and 2, the top sheet 2 covers the entire upper surface of the absorber 4. The front and rear end portions of the topsheet 2 are rounded and extend from the front end portion 44 and the rear end portion 45 of the absorber 4 in the longitudinal direction. The width direction outer end portion 21 of the topsheet 2 is linear along the longitudinal direction, and slightly extends in the width direction from each of the width direction outer end portions 43 of the absorber 4, as shown in FIG. It is separated from the back sheet 3.

As shown in FIG. 2, the back sheet 3 covers the entire lower surface of the absorber 4. The front and rear end portions of the back sheet 3 are rounded and extend from the front end portion 44 and the rear end portion 45 of the absorber 4 in the longitudinal direction. The width direction outer end portion of the back sheet 3 extends in the width direction from the width direction outer end portion 43 of the absorber 4.
As shown in FIG. 2, on the non-skin contact surface side of the absorbent main body 10, in detail, on the non-skin contact surface side of the back sheet 3, the upper surface of the crotch portion of the absorbent main body 10 and shorts ( A slip stopper 11 for fastening the inner surface is provided. The slip stopper 11 is made of an adhesive or the like. The same applies to the slip stopper 55 described later.

  As the top sheet 2 and the back sheet 3, various materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation. For example, as the surface sheet 2, a liquid permeable nonwoven fabric or an apertured film can be used. As the back sheet 3, a liquid-impermeable or water-repellent film or the like can be used.

  From the viewpoint of reducing the swelling of the absorbent main body 10, the back sheet 3 preferably has moisture permeability (breathability). As a moisture-permeable sheet, for example, a thermoplastic resin added with an inorganic compound or organic compound filler is melt-extruded from a T die or a circular die to form a film, and then the film is uniaxially stretched or biaxially A resin sheet obtained by stretching, a composite nonwoven fabric (for example, SM, SMS, SMMS, etc.) in which a spunbond nonwoven fabric (S) and a meltblown nonwoven fabric (M) are combined, an air-through nonwoven fabric, a composite nonwoven fabric such as SMS, and the resin A composite sheet with a sheet is mentioned.

  As the absorbent body 4, for example, an absorbent core mainly composed of a fiber aggregate such as pulp fiber, short fiber, or long fiber web that has been conventionally used and coated with a covering sheet can be used. The absorbent core may include a superabsorbent polymer. In addition, the covering sheet can be omitted when the constituent fibers of the absorbent core are not substantially dispersed without being covered with the covering sheet.

  As shown in FIGS. 2 and 3A, the absorbent body 4 has a pair of side portions 41, 41 and a center portion 42 in the width direction located between the pair of side portions 41, 41 in the width direction. Partitioned. At least in the excretory part facing part A of the absorbent main body 10, the pair of side parts 41, 41 of the absorbent body 4 is compressed more than the center part 42 in the width direction, thereby forming a pair of high compression regions P, P. ing. The central portion 42 in the width direction is not relatively compressed as compared with the high compression region P, and forms a low compression region Q.

The difference between the high-compression region P and the low-compression region Q is caused by a relative difference in the degree of compression when forming each region. The low compression area Q may not be compressed at all, but is usually compressed to some extent.
Since the high compression region P is compressed with a relatively large pressing force as compared with the low compression region Q, the high compression region P becomes thinner, the density becomes higher, and the rigidity becomes higher. On the other hand, the low compression region Q is compressed with a relatively small pressing force (or not compressed) as compared with the high compression region P, and thus becomes thicker, lower in density, and lower in rigidity. Become.

The thickness of the low compression region is preferably 2 to 10 mm, and more preferably 3 to 8 mm. The thickness of the high compression region is preferably 1 to 8 mm, more preferably 2 to 6 mm.
The difference between the thickness of the low compression region Q and the thickness of the high compression region P is preferably 1 to 9 mm, and more preferably 1 to 6 mm. The ratio of the thickness of the low compression region Q to the thickness of the high compression region P (the former / the latter) is preferably 1 to 10, and more preferably 1.2 to 4.
The difference between the density of the high compression region P and the density of the low compression region Q is preferably 0.02 to 0.45 g / cm ³ , and more preferably 0.04 to 0.20 g / cm ³ . The ratio of the density of the high compression region P to the density of the low compression region Q (the former / the latter) is preferably 0.5 to 10.0, and more preferably 1.0 to 4.0.
The difference between the stiffness value of the high compression region P and the stiffness value of the low compression region Q is preferably 20 to 150 cN, and more preferably 30 to 70 cN. The ratio of the stiffness value of the high compression region P to the stiffness value of the low compression region Q (the former / the latter) is preferably 2.0 to 10.0, and more preferably 3 to 6.

The thickness was measured by the following method. Keyence LK-085 Laser Displacement Meter was set on the stand and the reference value was measured using an aluminum φ25mm circular plate (adjusted to 0.49 cN / cm ² load), then the same aluminum on the absorber A thickness of 0.49 cN / cm ^{2 was} applied by installing and measuring a circular plate.
In addition, as a method for measuring the rigidity value, the measurement is performed according to the procedure of JIS-L1096 handle ohm meter method (measuring instrument: HOM-3 manufactured by Daiei Kagaku Seisakusho Co., Ltd.). Measurement was performed at 7 cm.

The high compression region P is formed up to the outer end portion 43 in the width direction of the absorbent body 4. The width of the high compression region P is preferably 10 to 28 mm, and more preferably 12 to 25 mm. The width | variety of the low compression area | region Q becomes like this. Preferably it is 30-65 mm, More preferably, it is 35-60 mm.
Further, the high compression region P is not formed up to the front end portion 44 and the rear end portion 45 in the longitudinal direction of the absorbent body 4. The length of the high compression region P is preferably 60 to 140 mm, and more preferably 80 to 120 mm. The distance from the front end 44 in the longitudinal direction of the absorbent body 4 to the end of the high compression region P (the distance in the longitudinal direction of the absorbent body 4) is preferably 30 to 70 mm, more preferably 40 to 60 mm. The distance from the rear end 45 in the longitudinal direction of the absorber 4 to the end of the high compression region P (the distance in the longitudinal direction of the absorber 4) is preferably 50 to 90 mm, and more preferably 60 to 80 mm.

  The high compression area P is formed at least in the excretion part facing part A, and may also be formed in the front part B and / or the rear part C. The length of the high compression region P located in the front portion B (the length in the longitudinal direction of the absorbent body 4) is preferably 5 to 15 mm, more preferably 7.5 to 12.5 mm. The length of the high compression region P located in the rear portion C (the length in the longitudinal direction of the absorbent body 4) is preferably 5 to 35 mm, and more preferably 7.5 to 32.5 mm.

For example, as shown in FIG. 3B and FIG. 3A, the absorber 4 has a large pressing force in a region that becomes a high compression region P with respect to a substantially equal thickness non-compressed absorber 4 ′. The region that becomes the low compression region Q can be obtained by compressing so that it does not substantially compress. Such a compression process can be performed using, for example, a pressing roll having a convex portion having a shape corresponding to the high compression region P.
According to such compression processing, the basis weight of the high compression region P and the basis weight of the low compression region Q are substantially the same.

The compression process for forming the high compression region P may be performed in the state of the absorbent body 4 alone, or may be performed in a state of being superposed on the top sheet 2 and / or the back sheet 3.
The non-compressed absorbent body 4 ′ means an absorbent body before the high-compression region P is formed, and may be compressed so as to form the absorbent body.

When the high compression region P is formed using a pressing roll having a smooth pressing surface of the convex portion forming the high compression region P, the upper surface (pressing surface) of the high compression region P is It becomes smooth following the shape of the pressing surface.
The shape (unevenness) of the upper surface of the high compression region P can be changed as appropriate by changing the uneven shape (that is, the emboss pattern) of the pressing surface of the convex portion that forms the high compression region P.

  For example, as shown in FIG. 4A, small dot-like embosses P1 are formed in a scattered manner on the entire upper surface of the high-compression region P, and pressing is performed so that portions other than the dot-like embosses P1 are smooth. As a result, the high compression region P can be formed. By forming such dot-like emboss P1, the texture of the upper surface of the high compression region P can be improved. In addition, about the upper surface of the high compression area | region P, the press process which makes smooth, and the formation process of dot-like emboss P1 can also be performed by a separate process (that is, the formation process of dot-like emboss P1 is performed as a secondary process). .

Moreover, as shown in FIG.4 (b), it can press-process so that the grid | lattice-like embossing groove | channel P2 may be formed in the upper surface of the high compression area | region P, and the high compression area | region P can be formed. The grid-like embossed grooves P <b> 2 may extend in an oblique direction with respect to the longitudinal direction of the absorber 4, or may extend in the longitudinal direction and the width direction of the absorber 4. The embossed groove P2 may be a continuous groove or a non-continuous groove.
When forming such a grid-like embossed groove P2, the magnitude of the stiffness value of the high compression region P and the degree of softness of the upper surface thereof can be easily set by changing the size of the grid. Can do.

Moreover, as shown in FIG.4 (c), it press-processes so that the large dot-shaped embossing P3 may be formed in the whole upper surface area of the high compression area | region P, and the high compression area | region P may be formed. it can. It is preferable that the dot-shaped emboss P3 is arranged randomly (irregularly). Specifically, in the high-compression region P, it is preferable to dispose a linear portion that can be a flexible shaft in an uncompressed portion other than the dot-like emboss P3.
When forming such dot-like emboss P3, the magnitude of the rigidity value of the high compression region P and the degree of softness of the upper surface thereof can be easily set by changing the size of the emboss P3. it can.

  Specifically, on the skin contact surface side of the excretory part facing part A of the absorbent main body 10, as shown in FIGS. 1 and 2 across the top sheet 2 and the absorbent body 4, A pressing groove 12 extending in the longitudinal direction is provided. The pressing groove 12 is formed by integrally compacting the topsheet 2 and the absorbent body 4. In the first embodiment, the compressed groove 12 is close to the inner end portion of the high compression region P in the low compression region Q (the central portion 42 in the width direction of the absorbent body 4) between the pair of high compression regions P and P. Thus, the absorbent main body 10 extends linearly in the longitudinal direction. That is, the compressed groove 12 is provided only in the central portion 42 in the width direction of the absorbent body 4.

The length of the compressed groove 12 (the length in the longitudinal direction of the absorbent body 4) is preferably 27 to 64% of the length of the high compression region P (the length in the longitudinal direction of the absorbent body 4). More preferably, it is 54%.
The width of the compressed groove 12 is preferably 1 to 5 mm, and more preferably 2 to 4 mm.
Since the squeezing groove 12 extending in the longitudinal direction is provided in the excretory part facing part A of the absorbent main body 10, liquid diffusion can be suppressed on the skin contact surface side of the absorbent main body 10.

  As shown in FIGS. 1 and 2, the wing portion 5 extends outward in the width direction from both side portions of the absorbent main body 10 in the excretory portion facing portion A. The wing part 5 is used by being folded back to the lower surface (outer surface) side of the crotch part of underwear such as shorts. In the form having the wing part 5 as in the first embodiment, a straight line connecting both bases of the wing part 5 is a boundary line between the absorbent main body 10 and the wing part 5. As shown in FIG. 1, the wing part 5 has a substantially trapezoidal shape in which a lower base (side longer than the upper base) is located on the side of the absorbent main body 10 in a plan view.

  On the non-skin contact surface side of the wing part 5, as shown in FIG. By using the slip stopper 55, the wing portion 5 folded back to the lower surface (outer surface) side of the crotch portion of the shorts can be fixed to the crotch portion at the time of use.

  As shown in FIGS. 1 and 2, the side leak-proof portion 6 is a component that covers the skin contact surface side of both sides of the absorbent main body 10, and the skin contact surfaces of both sides of the absorbent main body 10. It is provided on each of the sides so as to extend substantially along the longitudinal direction of the absorbent main body 10.

  The side leak-proof portion 6 includes a side sheet 61. The side sheet 61 is folded in the width direction to form a folded portion at the inner edge of the side leakage preventing portion 6 to form a two-layer region. In 1st Embodiment, 80% or more of the planar view area of the side leak-proof part 6 is a 2 layer area | region. The inner edge portion of the side leak-proof portion 6 is linear along the longitudinal direction of the absorbent main body 10.

  As the side sheet 61, various materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation. The side sheet 61 preferably has water repellency and / or moisture permeability, and may be liquid impermeable. Examples of the material of the site sheet 61 include a spunbond nonwoven fabric, a sheet in which the spunbond nonwoven fabric (S) and the melt blown nonwoven fabric (M) are combined (for example, SM, SMS, SMMS, etc.), a spunlace nonwoven fabric, and a heat roll nonwoven fabric. And water-repellent (hydrophobic) non-woven fabrics such as air-through non-woven fabrics.

  The side sheets 61 respectively extend outward in the width direction from both side portions of the absorbent main body 10 to form an upper layer of the wing portion 5. The back sheet 3 extends from the both sides of the absorbent main body 10 outward in the width direction to form a lower layer of the wing part 5. That is, the laminated body of the extended portion in the side sheet 61 and the extended portion in the back sheet 3 forms the wing portions 5 on the outer sides in the width direction of the absorbent main body 10.

  In the front part B, the front end part side and the outer edge part side of the side leak-proof part 6 are joined to the top sheet 2 or the back sheet 3 of the absorbent main body 10 by a front end seal part (not shown). Yes. Similarly, as for the side leak-proof part 6, in the rear part C, the rear end part side and the outer side edge part side are the surface sheet 2 or the back surface sheet 3 of the absorptive main body 10 by the rear end seal part (not shown). It is joined to. These end seal portions are formed by heat sealing or the like.

  The front end seal portion continuously extends in a substantially semicircular arc shape from the left edge of the front portion B of the absorbent main body 10 to the right edge via the front edge. Similarly, the rear end seal portion continuously extends in a substantially semicircular arc shape from the left edge of the rear portion C of the absorbent main body 10 to the right edge via the front edge. The top sheet 2 and the back sheet 3 are joined by both end seal portions.

  The lower surface of the side leak-proof portion 6 is joined to the top sheet 2 or the back sheet 3 in the vicinity of the outer edge of the side leak-proof portion 6, but in other regions, the top sheet 2 or the back sheet 3. Are not joined to each other, and a pocket is formed between the topsheet 2 and the topsheet 2. Of the lower surface of the side leak-proof portion 6, the ratio of the region not joined to the top sheet 2 and the back sheet 3 is preferably 15% or more, and more preferably 50% or more, in terms of area ratio. Of the lower surface of the side leakage preventing portion 6, the portion overlapping the absorber 4 in plan view is not joined to the topsheet 2.

  The pocket is opened at the time of wearing, and the body fluid that has moved outward in the width direction can be captured in the opened pocket. The body fluid captured in the pocket is absorbed by the absorber 4 while moving from the front of the pocket to the back, or after reaching the back of the pocket, is returned to the absorber 4 and absorbed.

Each component of the sanitary napkin 1 according to the first embodiment may be further joined by various adhesives (not shown) such as a hot melt adhesive in addition to the end seal portion described above.
The adhesive is provided between the absorber 4 and the back sheet 3, for example. The adhesive is preferably provided between the side sheet 61 and the back sheet 3 between the bases of the wing part 5. The adhesive may be applied continuously (in the form of a plane) (so-called solid coating), but is preferably intermittently applied in consideration of the air permeability of the coated area. Examples of the intermittent coating form include a spiral shape, a stripe shape extending in the width direction, an Ω shape, and a dot shape.

  In the sanitary napkin 1 according to the first embodiment, the absorbent main body 10 is disposed on the upper surface (inner surface) of the crotch portion (not shown) of the shorts, and is fixed to the crotch portion by the slip stopper 11. Then, the wing portion 5 is folded back to the lower surface (outer surface) side of the crotch portion, and the wing portion 5 is fixed to the outer surface of the crotch portion by the misalignment preventing agent 55, so that the wing portion 5 can be mounted while preventing misalignment.

  In the sanitary napkin 1 according to the first embodiment having the above-described configuration, the high compression region P is formed in the side portion 41 of the absorbent body 4 in the excretion portion facing portion A, and the high compression region P is the absorbent body. 4 in the width direction outer end portion 43 and not in the longitudinal direction front end portion 44 and rear end portion 45 of the absorber 4. Therefore, as shown in FIG. 5 (a), even if a force is applied to the absorbent body 4 inward in the width direction, the side portion 41 of the absorbent body 4 is difficult to twist, and therefore, regardless of the presence or absence of the compressed groove 12. The width direction central part 42 of the absorbent body 4 is likely to rise.

Specifically, as shown in FIG. 5B, the width direction inner end portion 46 of the side portion 41 of the absorber 4 is pushed up, and as a result, the position of the upper surface of the width direction central portion 42 of the absorber 4 is changed. Get higher. Alternatively, as shown in FIG. 5C, when the width direction inner end portion 46 of the side portion 41 of the absorbent body 4 does not rise, the width direction central portion 42 of the absorbent body 4 has a narrow width. As a result, the thickness increases and the position of the upper surface increases.
Therefore, the skin contact surface side of the central part in the width direction of the absorbent main body 10 is easily in close contact with the excretion part of the wearer, and the excreted body fluid can be quickly absorbed into the absorbent main body.

  Moreover, since the high compression area | region P of the absorber 4 has high rigidity, the twist in the side part of the absorptive main body 10 does not arise easily, and a side leak does not generate | occur | produce easily.

  Next, other embodiment of the absorbent article of this invention is described. In the other embodiments, differences from the first embodiment described above will be mainly described, and the same points are denoted by the same reference numerals and description thereof will be omitted. For the points that are not particularly described, the description of the first embodiment is applied as appropriate. In other embodiments, the same effects as those of the first embodiment can be obtained.

The absorber 4 has a single layer structure in the first embodiment, but in the present invention, the entire surface may have a multilayer structure.
Specifically, in the second embodiment, as shown in FIG. 6A, the absorber 4 has a two-layer structure including an upper layer absorber 4A and a lower layer absorber 4B. The planar view shapes of the upper layer absorber 4A and the lower layer absorber 4B are the same.
The absorber 4 can be easily formed thick by adopting a multilayer structure. At the boundary between the high compression region P and the low compression region Q, the absorber 4 is likely to break due to a sudden change in thickness. At the boundary with the low compression region Q, the change in thickness becomes gentle for each layer, so that the absorber 4 is hardly broken.

The compressed groove 12 can be provided across the widthwise central portion 42 (low compression region Q) and the high compression region P of the absorbent body 4.
For example, as shown to Fig.7 (a), the front-end part 12B and the rear-end part 12C of the pressing groove 12 are located in the high compression area | region P of the absorber 4, and the longitudinal direction center part 12A of the pressing groove 12 is the absorber 4. The squeezing groove 12 can be provided so as to form a curved shape located in the central portion 42 in the width direction. In addition to improving the leak-proof property due to the formation of the compressed groove, the inner end portion in the width direction of the side portion of the absorbent body 4 is pushed up by being formed into the compressed groove of such a shape. Shape deformation is likely to occur where the position of the upper surface of the central portion in the width direction of the body 4 is increased.
On the contrary, as shown in FIG. 7B, the front end portion 12B and the rear end portion 12C of the compressed groove 12 are located in the central portion 42 in the width direction of the absorbent body 4, and the central portion 12A in the longitudinal direction of the compressed groove 12 is absorbed. The compressed groove 12 can be provided so as to form a curved shape located in the high compression region P of the body 4. In addition to improving the leak-proof property by forming the compressed groove, the width direction central portion of the absorbent body 4 is narrowed by the compressed groove having such a shape. As the thickness increases, shape deformation that increases the position of the upper surface tends to occur.

The compressed groove 12 can be provided only in the high compression region P of the absorbent body 4.
For example, as shown to Fig.8 (a), in the high compression area | region P, the front-end part 12B and the rear-end part 12C of the pressing groove 12 are located in the width direction outer side of the absorber 4, and the longitudinal direction center part of the pressing groove 12 The pressing groove 12 can be provided so that 12A forms a curved shape located on the inner side in the width direction of the absorbent body 4. In addition to improving the leak-proof property by forming the compressed groove, the compressed groove having such a shape is set in the high compression region, so that the high compression region is stabilized. In addition, the inner end portion in the width direction of the side portion of the absorbent body 4 rises, and as a result, the shape deformation in which the position of the upper surface of the central portion in the width direction of the absorbent body 4 is more likely to occur.
On the other hand, as shown in FIG. 8B, in the high compression region P, the front end portion 12B and the rear end portion 12C of the compressed groove 12 are located on the inner side in the width direction of the absorbent body 4, and the center in the longitudinal direction of the compressed groove 12 The compressed groove 12 can be provided so that the portion 12A forms a curved shape located on the outer side in the width direction of the absorbent body 4. In addition to improving the leak-proof property by forming the compressed groove, the compressed groove having such a shape is set in the high compression region, so that the high compression region is stabilized. In addition, the widthwise central portion of the absorber 4 is narrowed, and as a result, the thickness is increased and the shape of the upper surface is likely to be deformed.

An auxiliary squeezing groove 13 different from the squeezing groove 12 can also be provided in the front part B and / or the rear part C of the absorbent main body 10.
For example, as illustrated in FIG. 9A, in the absorbent body 4 illustrated in FIG. 8A, auxiliary pressing grooves 13 extending in the width direction of the absorbent body 4 are formed in the front part B and the rear part C of the absorbent main body 10. Can be provided. The auxiliary squeezing groove 13 located at the front part B is convexly curved toward the front side of the absorber 4, and the auxiliary squeezing groove 13 located at the rear part C is convexly curved toward the rear side of the absorber 4. . Accordingly, a discontinuous circumferential squeezing groove is formed from the four squeezing grooves 12, the auxiliary squeezing grooves 13, the squeezing grooves 12, and the auxiliary squeezing grooves 13.
Similarly, as shown in FIG. 9 (b), in the absorbent body 4 shown in FIG. 8 (b), the same auxiliary pressing groove 13 as the auxiliary pressing groove 13 shown in FIG. 9 (a) can be provided. Also in the absorbent body 4 shown in FIG. 9B, a discontinuous circumferential pressing groove is formed from the four pressing grooves 12, the auxiliary pressing grooves 13, the pressing grooves 12 and the auxiliary pressing grooves 13.
Since it is formed in this way, in addition to the effect shown in FIG. 8A, it has the effect of preventing leakage in the front-rear direction and further preventing the central shape deformation from reaching the end.

It is also possible to connect the compressed groove 12 extending in the longitudinal direction and the auxiliary compressed groove 13 extending in the width direction to form a continuous circumferential compressed groove.
For example, as shown to Fig.10 (a), about the absorber 4 shown to Fig.9 (a), the edge parts of the adjacent pressing groove 12 and the auxiliary pressing groove 13 are connected, and continuous circumferential pressing is carried out. Grooves can be formed.
Similarly, as shown in FIG.10 (b), about the absorber 4 shown in FIG.9 (b), the edge parts of the adjacent pressing groove 12 and the auxiliary pressing groove 13 are connected, and continuous circumferential shape is obtained. A compressed groove can be formed.
Since it is formed in this way, in addition to the effect shown in FIG. 8B, it has the effect of preventing leakage in the front-rear direction and further preventing the central shape deformation from reaching the end.
7 (b), FIG. 8 (b), FIG. 9 (b), and FIG. 10 (b), the longitudinal direction of the absorbent article is such that the compressed grooves 12 and 13 surround the excretion point portion. It is provided in the center. The excretion point portion is a portion that is disposed opposite to the wearer's liquid excretion portion (in the case of a sanitary napkin, the vaginal opening), and is generally located at the center in the width direction of the absorbent article in the excretion portion facing portion A.

The absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, in addition to the absorbent body 4 having the high compression region P, a separate auxiliary absorbent body is disposed between the top sheet 2 and the absorbent body 4 and / or between the absorbent body 4 and the back sheet 3. can do.
The rear part C can be provided with rear flaps extending from both side parts of the absorbent main body 10. The rear flap is used by being attached to underwear such as shorts without being folded back in a state of extending from the absorbent main body 10.

The wing part 5 and / or the side leak-proof part 6 may not be provided.
Part or all of the wing part 5 may be formed only from the side sheet 61, or part or all of the wing part 5 may be formed only from the back sheet 3.
The configurations in the above-described embodiments can be appropriately combined.
The absorbent article of the present invention is not limited to sanitary napkins, and can also be applied to panty liners (orimono sheets), incontinence pads, and the like. The underwear to be worn is not limited to shorts.

FIG. 1 is a plan view showing a sanitary napkin as a first embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. Fig.3 (a) is a longitudinal cross-sectional view which shows the absorber in the sanitary napkin of 1st Embodiment, FIG.3 (b) is a longitudinal cross-sectional view which shows the absorber before a high compression area | region is formed. is there. 4A to 4C are plan views showing variations of the embossed shape on the upper surface of the high-compression region of the absorbent body in the sanitary napkin according to the first embodiment. Fig.5 (a)-(c) is a longitudinal cross-sectional view which shows the upheaval process of the absorber in the sanitary napkin of 1st Embodiment. Fig.6 (a) is a longitudinal cross-sectional view which shows the absorber in 2nd Embodiment, FIG.6 (b) is a longitudinal cross-sectional view which shows the absorber before a high compression area | region is formed. Fig.7 (a) and FIG.7 (b) are top views which show the variation of the planar view shape of the pressing groove in an absorber. Fig.8 (a) and FIG.8 (b) are top views which show the variation of the planar view shape of the pressing groove in an absorber. Fig.9 (a) and FIG.9 (b) are top views which show the variation of the planar view shape of the pressing groove in an absorber. Fig.10 (a) and FIG.10 (b) are top views which show the variation of the planar view shape of the pressing groove in an absorber.

Explanation of symbols

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 10 Absorbent main body 11 Dislocation stop agent 12 Squeeze groove 13 Auxiliary squeezing groove 2 Top sheet 3 Back sheet 4 Absorber 41 Side part 42 Width direction center part 43 Width direction outer end part 44 Front end part 45 Rear end part 5 Wing part 55 Deviation Stop agent 6 Side leakage prevention part 61 Side seat A Excretion part opposite part B Front part C Rear part P High compression area Q Low compression area

Claims (5)

A vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber disposed between both sheets,
The pair of side parts of the absorbent body in at least the excretory part facing part of the absorbent article is compressed more than the center part in the width direction located between the side parts, thereby forming a pair of high compression regions. And
The high-compression region is an absorbent article that is not formed up to the longitudinal front and rear ends of the absorbent body.   A pair of squeezing grooves extending in the longitudinal direction of the absorbent main body, which is formed by compressing the topsheet and the absorbent body, are provided on the side of the topsheet on both sides of the excretory part-facing portion of the absorbent main body. The absorbent article according to claim 1.   The absorbent article according to claim 2, wherein the squeezing groove is provided at a central portion in the longitudinal direction of the absorbent article so as to surround the excretion point part.   The absorbent article according to claim 3, wherein the compressed groove is provided across the widthwise central portion of the absorbent body and the high compression region.   Absorbent body provided with the top sheet, the back sheet and the absorber, a pair of wings extending outward in the width direction from both side portions of the absorbent body, and skin on both sides of the absorbent body The absorbent article in any one of Claims 1-4 which has a pair of side leak-proof part which each coat | covers the contact surface side.

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