KR101785900B1

KR101785900B1 - Absorbent article

Info

Publication number: KR101785900B1
Application number: KR1020177014742A
Authority: KR
Inventors: 유지 다카하시; 도시유키 다니오; 도모유키 후지타
Original assignee: 유니챰 가부시키가이샤
Priority date: 2014-12-01
Filing date: 2015-07-08
Publication date: 2017-10-16
Also published as: KR20170069289A; JP6005124B2; CN106999307B; CN106999307A; JP2016104095A; MY163828A; WO2016088400A1

Abstract

The present disclosure aims at providing an absorbent article having a hip flap portion with excellent fitability and breathability. The absorbent article of the present disclosure has the following configuration. An absorbent article (1) comprising a body portion (2) extending in the longitudinal direction (L) and a hip flap portion (5) extending outward in the width direction (W) from the body portion (2) ) Comprises a first sheet (12) having a skin contact surface (11) and a second sheet (13) arranged on the side closer to the first sheet (12), and the first sheet (12) Woven fabric having a concavo-convex structure including a concave portion 33 and a convex portion 34 and a compression amount of 0.3 gf · cm / cm 2 or more measured from the side of the skin-contacting surface 11, Characterized in that the second sheet (13) has a compression quantity greater than the compression quantity of the first sheet (12).

Description

[0001] ABSORBENT ARTICLE [0002]

This disclosure relates to absorbent articles.

In general, an absorbent article such as a sanitary napkin absorbs and retains body fluid such as menstrual blood by providing a liquid permeable layer, a liquid impermeable layer, and an absorbent layer therebetween. Further, in order to prevent body fluids such as menstrual discharge from leaking around the absorbent article, the absorbent article is provided with a hip flap extending outward in the width direction from the absorbent body to prevent the body fluids from adhering to the clothing of the wearer.

As described in Patent Document 1, the absorbent article having the hip flap portion is formed to be larger than that having no hip flap portion in order to prevent body fluids such as menstrual blood from adhering to the wearer's wear. It is also known that the hip flap portion has three layers of a side sheet, a back sheet, and an intermediate layer therebetween, as described in Patent Document 1.

Japanese Patent Application Laid-Open No. 2014-36833

It is difficult for the absorbent article having the hip flap portion to follow the shape and the movement of the body of the wearer and there is room for improvement from the viewpoint of fitability. In addition, the absorbent article having the hip flap portion is inferior in air permeability to the hip flap portion, and tends to be uncomfortable to the wearer's buttocks.

Accordingly, the present disclosure aims to provide an absorbent article having a hip flap portion with excellent fitability and breathability.

The present invention relates to an absorbent article having a body portion extending in the longitudinal direction and a hip flap portion extending outwardly in the width direction from the body portion, the hip flap portion including a first sheet having a skin- Wherein the first sheet is a nonwoven fabric having a concavo-convex structure including a concave portion and a convex portion on the skin contact surface, and the second sheet is a 0.3 gf · cm / Lt; 2 > or more, and the second sheet has a compression amount that is larger than the compression amount of the first sheet.

The absorbent article of the present disclosure has a hip flap portion having excellent fitability and air permeability.

1 is a front view of an absorbent article 1, in particular a sanitary napkin, according to one of the embodiments of the present disclosure.
2 is a rear view of the absorbent article 1 shown in Fig.
3 is a cross-sectional view taken along line III-III in Fig.
4 is a front view showing the topsheet 2 and the first sheet 12 separated from the absorbent article 1 shown in Fig.
5 is an enlarged perspective view of the hip flap section 5 of the absorbent article 1 shown in Fig.

[Justice]

[Concave portion and convex portion]

In this specification, the concave portion and the convex portion are partitioned at an intermediate point between these heights. That is, the convex portion is higher than the intermediate point between the top portion of the convex portion and the bottom portion of the concave portion, and the concave portion is lower than the intermediate point. The same applies to the portion and the groove portion.

The absorbent article of the present disclosure will be described below in detail with reference to the drawings as appropriate.

The absorbent article 1 of the present embodiment includes a main body portion 2 having a longitudinal direction L and a lateral direction W and extending in the longitudinal direction L and a main body portion 2 extending in the width direction W, which are arranged in the longitudinal direction. The pair of the hip flap portions 5 are disposed on the rear side of the absorbent article 1 and abut the rear end portions in the longitudinal direction L of the absorbent article 1. The absorbent article 1 of the present embodiment also has a pair of side flap portions 3 disposed at the center of the longitudinal direction L of the absorbent article 1.

The body part 2 includes a liquid-permeable layer 6, a liquid-impermeable layer 7, and an absorbent layer 8 between the liquid-permeable layer 6 and the liquid-impermeable layer 7. The pair of the hip flap portions 5 of the absorbent article 1 includes a first sheet 12 having a skin contact surface 11 and a second sheet 13 And a non-breathable sheet 14 having a wear contact surface. The pair of side flap portions 3 also have the same configuration as the hip flap portion 5.

In the absorbent article 1 of the present embodiment, the body portion 2 has the adhesive portion 15 fixed to the liquid-impermeable layer 7, and the absorbent article 1, specifically, the body portion 2 Is fixed to the inner side of the garment of the wearer through the adhesive portion 15.

The pair of side flap portions 3 has a pair of adhesive portions 16 fixed to the non-breathable sheet 14 and is provided with the absorbent article 1 and specifically a pair of side flap portions 3 ) Is folded toward the liquid-impermeable layer 7, and then fixed to the outside of the wearer's wear, via the pair of adhesive portions 16. [

The pair of the hip flap portions 5 has a pair of adhesive portions 17 fixed to the air-impermeable sheet 14 and the pair of the hip flap portions 5 are not bent, Is fixed to the inside of the wearer's wearer through the adhesive portion (17).

The absorbent article 1 of the present embodiment includes a pressed portion 21 formed by pressing a liquid permeable layer 6 and an absorbent layer 8 formed on the body portion 2 and a liquid permeable layer 6 and an absorbent layer Permeable layer 6 and the liquid-impermeable layer 7, and is provided with a seal portion (not shown) for sealing the outer edge of the absorbent article 1 23). The seal portion 23 is also a pressed portion.

The pair of the hip flap portions 5 includes a first sheet 12 having a skin contact surface 11, a second sheet 13 and a pressed portion 24 formed by pressing the non-breathable sheet 14 . The pair of the hip flap portions 5 are formed by pressing the first sheet 12, the non-breathable sheet 14 and the second sheet 13 as desired, And a seal portion 25 for sealing the outer edge. Further, the seal portion 25 has a portion including the second sheet 13 and a portion not including the second sheet 13. The pair of side flap portions 3 are formed by pressing the first sheet 12 and the non-breathable sheet 14 and have a seal portion 25 for sealing the outer edge of the absorbent article 1 .

3, the liquid-permeable layer 6 of the main body portion 2 and the first sheet 12 of the hip flap portion 5 are continuous and formed of a single sheet have. The liquid-impermeable layer 7 of the body portion 2 and the non-breathable sheet 14 of the hip flap portion 5 are continuous and formed from a single sheet. The same applies to the first sheet 12 of the side flap portion 3 and the non-breathable sheet 14 of the side flap portion 3. [

The absorbent article 1 of the present embodiment has the pressed portion 26 formed by folding the liquid permeable layer 6 twice to form the folded portion 35 and pressing the folded portion 35 thereon. A part of the folded portion 35 also forms a leakage preventing wall for preventing the absorbed body fluids from flowing from the body portion 2 in the direction of the side flap portion 3 and the hip flap portion 5. [

In the absorbent article 1 of the present embodiment, the liquid-permeable layer 6 of the main body portion 2 includes a convex portion 31, which is a plurality of slub portions extending in the longitudinal direction L, And a concave portion 32 which is a plurality of grooves arranged between the concave portions 32. The first sheet 12 of the hip flap portion 5 is provided with a convex portion 33 which is a plurality of bump portions extending in the longitudinal direction L and a plurality of concave portions 33 arranged between the convex portions 33, Non-woven fabric having a recessed portion (34). The same applies to the side flap portion 3.

In the absorbent article of the present disclosure, the first sheet has a concave-convex structure including a concave portion and a convex portion on the skin-contacting surface. Since the first sheet has a concave-convex structure on the skin-contacting surface, the air-permeability in the plane direction of the skin-contacting surface of the first sheet is excellent. Further, since the first sheet has a concave-convex structure on the skin-contacting surface, the first sheet can be deformed following the three-dimensional shape of the body of the wearer, and the first sheet and the hip flap portion are excellent in fitability.

As the concave portion, a groove portion extending in a predetermined direction is preferable, and as the convex portion, a small portion extending in a predetermined direction is preferable. The predetermined direction includes, for example, the longitudinal direction and the width direction of the absorbent article.

The difference between the height of the top of the convex portion and the bottom of the concave portion is preferably 0.3 mm to 2.0 mm. From the viewpoint of breathability and tactile property of the first sheet.

The height of the top portion of the convex portion and the bottom portion of the concave portion is measured using a two-dimensional laser displacement meter. As the two-dimensional laser displacement gauge, for example, a high-precision two-dimensional laser displacement gauge LJ-G series (model: LJ-G030) manufactured by Gensen Kabushiki Kaisha.

For example, in Fig. 5, the first sheet has a convex portion 33 as a plurality of slits extending in the longitudinal direction L and a concave portion 34 as a plurality of grooves on the skin contact surface 11 , And excellent in air permeability in the plane direction, particularly in the longitudinal direction (L). 5, the first sheet 12 is provided with a convex portion 33 as a plurality of slits extending in the longitudinal direction L and a concave portion 34 as a plurality of grooves on the skin- The first sheet 12 can be deformed to conform to the three-dimensional shape of the wearer's body, particularly, the three-dimensional shape of the wearer in the width direction, so that the first sheet 12 and the hip flap 15 Excellent fit.

In the absorbent article of the present disclosure, it is preferable that the concave portion includes a groove portion extending in a predetermined direction and a groove portion reaching the outer edge of the absorbent article at at least two positions. By doing so, the grooves achieve the function of the air passage having the two vent holes at the outer edge portion of the absorbent article. Therefore, even when the absorbent article is in close contact with the body of the wearer, Is excellent in air permeability.

5, the concave portion 34, which is a groove portion, is disposed between the convex portions 33 which are bump portions, and the concave portion 34 which is a groove portion extends in the direction of the longitudinal direction L, And reaches the outer edge of the absorbent article 1 at the end 41 of the concave portion 34. Therefore, the concave portion 34 serving as the groove portion achieves the role of the air passage having the two ventilation holes (the end portions 41), so that even when the absorbent article 1 is in close contact with the body of the wearer, 12 have excellent air permeability in the plane direction.

In the absorbent article of the present disclosure, it is preferable that the concave portion is not an embossed portion formed by pressing at least the first sheet. The embossed portion is high in fiber density, in particular, has poor air permeability in the thickness direction of the first sheet and tends to be hard, so that the hip flap portion hardly fits into the three-dimensional shape of the wearer's body.

The heap flap portion may include an embossed portion, and the recessed portion and the embossed portion may partially overlap. This is because the first sheet has excellent air permeability in the planar direction by having the embossed portion continuous or the intermittent embossed portion adjacent thereto. However, since the embossed portion tends to have low air permeability in the thickness direction and become hard as described above, it is preferable that the embossed portion is small in amount.

In the absorbent article of the present disclosure, when the first sheet is measured from the side of the skin-contacting surface, it is preferable that the first sheet is at least 0.3 gf · cm / cm 2, preferably at least 0.5 gf · cm / cm 2, more preferably at least 0.7 gf · cm / Or more, and more preferably 0.8 gf · cm / cm 2 or more. By having the first sheet have the above-mentioned lower limit of the amount of compression, the first sheet has a predetermined gap, and the air permeability in the plane direction and thickness direction in the first sheet is excellent. In addition, by having the lower limit of the amount of compression, the first sheet is soft and can fit into the wearer's body.

In the absorbent article of the present disclosure, when the first sheet is measured from the skin contact side, it is preferably 2.0 gf · cm / cm 2 or less, more preferably 1.6 gf · cm 2 / cm 2 or less, gf · cm / cm 2 or less. When the first sheet has the upper limit of the amount of compression, the concavo-convex structure of the first sheet is liable to be maintained when the wear pressure is applied. When the value of the compression amount is large, the softness of the first sheet improves, but it becomes difficult to maintain the concavo-convex structure.

The amount of compression and the compression resilience to be described later are measured by KES-FB3 manufactured by KATO TECH CORPORATION according to KES (Kawabata's Evaluation System for Fabrics).

The WC (Work of Compression) is a value indicating compressibility, that is, compressibility. The larger the value, the easier it is to compress, that is, the soft, and the smaller the value, . Further, the compression resilience (RC) is excellent in compression recovery property as the numerical value approaches 100%.

The measurement conditions of the KES-FB3 are as follows.

· SENS: 2

Speed: 50 sec / mm

· Stroke: 5 mm / 10 V

· Pressurized area: 2 ㎠

· Acquisition interval: 0.1 second

· Upper limit weight: 50 g / ㎠

· Number of repetitions: 1

In the absorbent article of the present disclosure, it is preferable that the first sheet is at least 0.50 m 3 / m 2 / min, more preferably at least 0.60 m 3 / m 2 / min, even more preferably at least 0.75 m 3 / Has an air permeability in the plane direction of 0.90 m 3 / m 2 / min or more. The first sheet has the air permeability in the planar direction as described above, the first sheet is excellent in air permeability in the planar direction, and further, the wearer feels uncomfortable feeling such as a feeling of humid and uncomfortable feeling.

The air permeability in the plane direction of the sample is measured according to the following procedure.

(1) The sample is allowed to stand under the condition of 20 占 폚 and 60% RH for 24 hours.

(2) Under the conditions of 20 占 폚 and 60% RH, a breathability tester, KES-F8-AP1, manufactured by KATO TECH CORPORATION is prepared.

(3) The chamber is set in the breathability tester.

(4) Samples are cut into sample pieces having a size of about 12 cm x about 12 cm, and placed in the breathability tester.

(5) Place an acrylic plate of 15 cm x 15 cm on the sample so that a pressure of 32.6 mPa is applied to the sample, and measure the aeration resistance of the sample.

(6) The above-described measurement is repeated five times in total, and the average value thereof is adopted as the air-flow resistance value AR (㎪ s / m) of the sample.

(7) The ventilation resistance value (AR) is calculated as follows:

AP (m 3 / m 2 / min) = 7.473 / AR

(M 3 / m 2 / min) in terms of the air permeability AP (m 3 / m 2 / min) according to the air permeability AP (m 3 / m 2 / min).

In the absorbent article of the present disclosure, it is preferable that the second sheet has a compression work amount larger than the compression work amount measured from the skin contact surface side of the first sheet, and the second sheet has a compression work amount , Preferably not less than 0.10 gf · cm / cm 2, more preferably not less than 0.15 gf · cm / cm 2, and more preferably not less than 0.20 gf · cm / cm 2.

Further, the compression amount of the second sheet is preferably measured from the wearer's side. From the viewpoint of protecting the shape of the first sheet.

The second sheet has a compression amount greater than the compression amount measured from the skin contact surface side of the first sheet so that the second sheet is positively deformed before the first sheet when the wear pressure is applied to the first sheet Even when the wear pressure is applied, the shape of the first sheet, in particular, the concavo-convex structure of the skin contact surface of the first sheet can be maintained, and even if the wear pressure is applied, The air permeability in the plane direction and the thickness direction is maintained. Further, the second sheet is positively deformed, thereby improving the fitability of the absorbent article.

It is also preferable that the second sheet has a compression amount larger than the compression amount measured from the skin contact surface side of the first sheet because the second sheet has a compression amount exceeding 0.3 gf · cm / Of the voids. Therefore, in the state in which the wearing pressure is not applied or the wearing pressure is low, the second sheet is moved in the planar direction (the longitudinal direction L and the width direction W in Fig. 5) The thickness direction T of FIG. 5] is excellent.

In the absorbent article of the present disclosure, the second sheet preferably has a compression yield of at least 0.7 gf · cm / cm 2, more preferably at least 0.8 gf · cm / cm 2, and even more preferably at least 0.9 gf · cm / Respectively. From the viewpoint of protecting the shape of the skin-contacting surface of the first sheet and improving the fitability of the hip flap portion.

In the absorbent article of the present disclosure, the second sheet preferably has a compression resilience of at least 40%, more preferably at least 45%, and even more preferably at least 50%. By having the second sheet having the compression resilience described above, even if the wearing pressure is applied and the thickness of the second sheet is reduced, the thickness of the second sheet can be rapidly increased if the wearing pressure is not applied . As a result, the second sheet may have the action of a pump for discharging the air inside the hip flap portion and replacing the air.

In the absorbent article of the present disclosure, it is preferable that the fiber density of the concave portion of the first sheet is lower than the fiber density of the convex portion of the first sheet. By doing so, the concave portion of the first sheet is excellent in air permeability in the thickness direction of the first sheet, and further, the wearer feels uncomfortable feeling such as a feeling of humid and uncomfortable feeling.

In the absorbent article of the present disclosure, it is preferable that the content ratio of the thickness direction fibers in the concave portion of the first sheet is lower than the content ratio of the thickness direction fibers in the convex portion of the first sheet. By doing so, the bottom portion of the concave portion can be made deeper, and the first sheet is excellent in air permeability in the planar direction, and further, the wearer feels uncomfortable feeling such as a feeling of humid and uncomfortable feeling.

In the present specification, the "oriented fibers in the thickness direction" means fibers oriented at an angle of +45 degrees to -45 degrees with respect to the thickness direction of the absorbent article. The content ratio of the oriented fibers in the concave portion in the thickness direction is preferably 55% to 100%, and more preferably 60% to 100%. The difference between the content ratio of the thickness direction fibers in the concave portion and the content ratio of the thickness direction fibers in the convex portion is preferably 10% to 100%, more preferably 20% to 100%.

The method of measuring the content ratio of the oriented fibers in the thickness direction is as follows.

(1) Cut the sample to prepare a sample piece.

(2) Using a digital microscope VHX-100 manufactured by Gensen, an enlarged image is taken from a vertical direction with respect to the cut surface of the sample piece. The enlarged image is an image magnified at a magnification that allows measurement of 50 or more fibers, and the enlargement magnification is, for example, 20 to 50 times. At the time of taking an enlarged image, the depth of focus (depth) is set by focusing on the frontmost fiber of the cut surface of the sample piece (irregularly excluding the fiber protruding forward). The enlarged image is created on the PC screen as a 3D image.

(3) The 3D image is converted into a 2D image, and a plurality of lines extending parallel to the thickness direction of the nonwoven fabric sample are drawn on the 2D image and oriented at an angle of +45 degrees to -45 degrees with respect to the thickness direction of the nonwoven fabric sample The number of fibers to be counted is counted.

(4) Calculate the ratio of the number of counted fibers to the total number of fibers in the measurement range.

(5) The steps (1) to (4) are repeated several times (for example, three to five times), and the average value is defined as the content ratio of the oriented fibers in the thickness direction.

In the absorbent article of the present disclosure, the hip flap portion further includes a non-breathable sheet on the surface of the second sheet opposite to the first sheet, and the hip flap portion is provided with a cold feeling component on a portion other than the skin- You can have it. By doing so, the cold feeling component can penetrate the first sheet from the inside of the hip flap portion and act on the wearer's skin. Since the cold feeling component is disposed on a portion other than the skin-contacting surface of the first sheet, it can act on the skin of the wearer for a long time with an appropriate strength.

Examples of the cold sensation component include those known as cold sensitizers in the art, such as those acting on the receptor activation channel (TRPM8) in the nerves of the skin, such as menthol (for example, l-menthol) , Methyl salicylate, camphor, essential oils derived from plants (e.g., mint, eucalyptus), and the like. Examples of the functional component having a cooling function include those which lower the ambient temperature by the heat of vaporization, for example, alcohols such as methanol and ethanol. The cold component may be held in a microcapsule.

The portion other than the skin-contacting surface of the first sheet may be a surface on the wearer's side of the second sheet, an inside of the second sheet, a surface on the wearer's side of the second sheet and a surface on the wearer's side of the third sheet, . &Lt; / RTI >

In the absorbent article of the present disclosure, it is preferable that the hip flap portion has a color of a whitish color system. This is because the breathability of the absorbent article can be emphasized from the viewpoint of time. In addition, in order for the heap flap portion to have a one-color system color, the first sheet, the second sheet, the non-breathable sheet as desired, and any combination thereof may have a color of a simple color system.

Examples of the color of the white color system include blue color.

The first sheet preferably has a basis weight of 10 g / m 2 to 50 g / m 2, more preferably 15 g / m 2 to 40 g / m 2, and more preferably 20 g / m 2 to 30 g / m 2 . In view of the effect of the present disclosure. The first sheet preferably has a thickness of 0.5 mm to 3.0 mm, more preferably 0.7 mm to 2.0 mm. In view of the effect of the present disclosure.

The second sheet has a basis weight of preferably from 10 g / m 2 to 50 g / m 2, more preferably from 15 g / m 2 to 45 g / m 2, and still more preferably from 20 g / m 2 to 40 g / . In view of the effect of the present disclosure. The second sheet preferably has a thickness of 1.0 mm to 3.0 mm, more preferably 1.5 mm to 2.5 mm. In view of the effect of the present disclosure.

The basis weight is measured in accordance with JIS L 1913: 2010 " 6.2 mass per unit area (ISO method) ".

The thickness (mm) is measured as follows.

(Temperature: 23 ± 2 ° C, relative humidity: 50 ± 5%) was prepared, and FS-60DS manufactured by Daikagaku Seiki Seisakusho Co., Ltd. (measuring surface 44 mm ), The thickness of the five portions at which the absorber is different is pressed, and the thickness after ten seconds of the pressing at each portion is measured, and the average value of the five measured values is taken as the thickness.

In the absorbent article of the present disclosure, the first sheet is not particularly limited as long as it has a concavo-convex structure and has a predetermined compression amount, etc., and can be manufactured by a method known in the art. For example, the first sheet can be produced using the methods described in Japanese Patent Application Laid-Open Nos. 2008-25079, 2008-23326, 2009-30218, and the like. Specifically, a first sheet as a nonwoven fabric is formed by forming a concave-convex structure by jetting a gas onto a web containing thermoplastic resin fibers, and then heat-treating the web having the concavo-convex structure to heat the intersections of the thermoplastic resin fibers in the web Followed by fusing.

In this method, a web is disposed on a breathable support member (e.g., a mesh-like support member), and a gas (usually air) is continuously sprayed on the upper surface of the web while moving the breathable support member in a predetermined direction, A concave-convex structure including a concave portion and a convex portion (a rib groove structure including a slit portion and a groove portion) can be formed. Further, the lower surface of the web has a shape conforming to the shape of the air-permeable support member. For example, when the web arrangement surface of the mesh-like support member is flat, the lower surface of the web becomes substantially planar (therefore, the lower surface of the formed nonwoven fabric also becomes flat).

A concave portion (groove portion) extending in the moving direction of the air-permeable support member is formed in the region of the upper surface of the web where the gas is injected, and a convex portion (a groove portion) is formed between two adjacent concave portions . At this time, since the fibers in the region to which the gas is injected move to both sides of the concave portion (groove portion), the basis weight of the convex portion (small portion) is usually higher than the basis weight of the concave portion (groove portion).

Further, the fibers in the web are wound up by the air blown by the non-communicating portion (for example, wire) of the air-permeable support member and flared up so that the fibers in the web are wound up in the convex portion The content ratio of the oriented fibers in the thickness direction becomes larger than the content ratio of the oriented fibers in the thickness direction in other portions (for example, recesses (groove portions)). The number, spacing, basis weight, fiber density, content ratio of oriented fibers in the thickness direction, etc. of the convex portion (concave portion) and the concave portion (groove portion) are determined depending on the number of the nozzles, the aperture and pitch, the temperature and injection amount of the gas injected from the nozzle, So that the desired range can be adjusted.

In this method, for example, by changing the thickness of the web, the amount of compression of the formed nonwoven fabric can be adjusted. For example, by increasing the thickness of the web, the amount of compression of the formed nonwoven fabric can be increased.

Further, in the above method, the air permeability in the plane direction of the formed nonwoven fabric can be increased by deepening the bottom portion of the concave portion or widening the pitch of the convex portion.

In the above method, for example, the fiber density of the concave portion can be made lower than the fiber density of the convex portion by raising the injection amount of the gas injected from the nozzle. The nonwoven fabric having a fiber density of the concave portion that is lower than the fiber density of the convex portion can be produced by a method described in, for example, Japanese Patent Application Laid-Open No. 2008-002034, Japanese Patent Application Laid-Open No. 2008-023311, and the like.

Further, the first sheet may be a multilayer sheet including at least two layers, and may have a gap between these two layers. For example, the first sheet may be a multi-layered sheet comprising an upper layer fiber sheet and a lower layer fiber sheet, wherein the upper layer fiber sheet has a concave-convex structure including a concave portion and a convex portion on a substantially flat lower-layer fiber sheet .

The production method of the above-mentioned multi-layer sheet is known, and for example, a method is known in which a first roll having a concavo-convex shape on its surface and a second roll having a concavo-convex shape engaged with the first roll, The upper layer sheet is laminated on the lower layer sheet, and then the upper layer sheet and the lower layer sheet are bonded to each other.

The first sheet may be, for example, a double-layer sheet comprising an upper layer sheet and a lower layer sheet, which is a double-layer sheet obtained by bonding an upper layer sheet having a concavo-convex structure including concave portions and convex portions on a lower layer sheet as a porous film.

For example, the upper-layer sheet is produced by carrying a web on an air-permeable support member having a concavo-convex shape, blowing hot air through the web, and fusing the fibers in the web to form a concavo- An upper layer sheet which is a non-woven fabric having a nonwoven fabric.

The above-mentioned upper-layer sheet is laminated on a lower-layer sheet which is a porous film, and these sheets are joined together by an adhesive, for example, to form the above-mentioned multilayer sheet.

In the absorbent article of the present disclosure, the second sheet is not particularly limited as long as it has a compression amount larger than the compression amount of the first sheet, and preferably has a compression resilience of not less than 40%. The second sheet is preferably a nonwoven fabric, and more preferably an air-through nonwoven fabric or a spunlaced nonwoven fabric. The second sheet can be selected from commercially available nonwoven fabrics and the like.

When the second sheet is a nonwoven fabric, for example, if the thickness of the second sheet is selected, the amount of compression tends to increase. Further, for example, when the fibers constituting the nonwoven fabric are selected to be harder, compression resilience tends to be increased.

The second sheet may also be a nonwoven fabric having a concavo-convex structure including concave portions and convex portions. This is because the air permeability in the planar direction is excellent. As the nonwoven fabric having the concavo-convex structure including the concave portion and the convex portion, the same as the first sheet can be cited.

Example

Hereinafter, for example, the present disclosure will be described, but the present disclosure is not limited to these examples.

[Production Example 1]

(1) Production of web

(Average fineness: 1.8 dtex, average fiber length: 45 mm) having polyethylene terephthalate as a core component and polyethylene terephthalate as a core component, and a composite fiber comprising polyethylene terephthalate as a core component and polyethylene terephthalate as a core component, (Average fiber size: 2.4 dtex, average fiber length: 45 mm) (weight ratio 1: 1). 1 (basis weight: 25 g / m < 2 >).

(2) Production of nonwoven fabric

Web No. According to the method described in Japanese Patent Application Laid-Open No. 2008-23311, a first sheet No. 1 having a descriptor structure including a block portion and a groove portion was produced. 1.

Various settings in the used nonwoven fabric manufacturing apparatus are as follows.

Diameter of jetting port 332: 1.0 mm (capacity)

Pitch of the jetting port 322: 3.0 mm

Injection gas temperature: 310 ° C

Injection gas volume per nozzle: 5 L / min

Web conveying speed: speed 100 m / min

Air-permeable support member 310 (mesh-shaped support member): 70 mesh

Heat treatment by the heater unit 340: Treatment at a heat treatment temperature of 140 占 폚 at a passing air velocity of 1.2 m / sec for 6 seconds

First sheet No. 1 are shown in Table 1.

[Production Example 2]

(Average fineness: 3.4 dtex, average fiber length: 40 mm) having polyethylene terephthalate as a core component and polyethylene terephthalate as a core component and polyethylene as a sheath component Was prepared in the same manner as in Production Example 1, except that the weight ratio of the composite fibers (average fineness: 3.4 dtex, average fiber length: 50 mm) (mass ratio 1: 1) 2.

First sheet No. 2 are shown in Table 1.

[Production Example 3]

The commercially available SMS nonwoven fabric was used as the first sheet No. 1. 3 < / RTI > First sheet No. 3 are shown in Table 1.

[Production Example 4]

From the commercially available air-through nonwoven fabric, those having the characteristics shown in Table 1 were selected, and the second sheet No. 2 was obtained. 1.

[Production Example 5]

From the commercially available air-through nonwoven fabric, those having the characteristics shown in Table 1 were selected, and the second sheet No. 2 was obtained. 2 < / RTI >

The commercially available SMS nonwoven fabric is used as the second sheet No. 1. 3 < / RTI > Second sheet No. 3 are shown in Table 1.

[Examples 1 and 2 and Comparative Examples 1 to 3]

Using the first sheet and the second sheet shown in Table 1, the absorbent article No. 1 shown in Fig. 1 to No. 5. In Comparative Example 2, there was no second sheet, and in Comparative Example 3, the first sheet was the second sheet. 1, and there is no second sheet.

Absorbent article No. 1; 1 to No. 5 were worn by a plurality of volunteers and evaluated by the following criteria, the results as shown in Table 1 were obtained.

[Fit Castle]

○: I did not feel the existence of the hip flap part very much.

B: In the case of moving, the presence of the hip flap was felt.

X: I always felt the presence of a hip flap.

[Humid and frustrating feeling]

○: I did not feel the sweaty and frustrating feeling of the hip flap part.

?: Depending on the operation, the heap flap part may feel a humid and uncomfortable feeling.

X: The heap flap felt wet and uncomfortable.

Specifically, the present disclosure relates to the following J1 to J10.

[J1]

An absorbent article having a body portion extending in the longitudinal direction and a hip flap portion extending outwardly in the width direction from the body portion,

Wherein the hip flap portion includes a first sheet having a skin contact surface and a second sheet disposed on the wearer's side than the first sheet,

Wherein the first sheet is a nonwoven fabric having a concavo-convex structure including a concave portion and a convex portion on the skin contact surface and has a compression yield of 0.3 gf · cm / cm 2 or more measured from the skin contact surface side,

Wherein the second sheet has a compression yield greater than the compression amount of the first sheet.

[J2]

And the second sheet has a compression yield of 0.7 gf · cm / cm 2 or more.

[J3]

The absorbent article according to J1 or J2, wherein the second sheet has a compression resilience of at least 40%.

[J4]

The absorbent article according to any one of claims 1 to 3, wherein the first sheet has a planar air permeability of not less than 0.50 m 3 / m 2 / min.

[J5]

The absorbent article according to any one of claims 1 to 4, wherein the concave portion includes a groove portion extending in a predetermined direction and including a groove portion reaching an outer edge of the absorbent article at at least two positions.

[J6]

The absorbent article according to any one of claims 1 to 5, wherein the fiber density of the concave portion of the first sheet is lower than the fiber density of the convex portion of the first sheet.

[J7]

The absorbent article according to any one of claims 1 to 6, wherein the content ratio of the thickness direction fibers in the concave portion of the first sheet is lower than the content ratio of the thickness direction fibers in the convex portion of the first sheet.

[J8]

The first sheet is formed by forming a concavo-convex structure by jetting a gas onto a web containing thermoplastic resin fibers and then heat-treating the web having the concavo-convex structure to thermally fuse the intersections of the thermoplastic resin fibers in the web, The absorbent article according to any one of < RTI ID = 0.0 > J1 < / RTI >

[J9]

Wherein the heap flap portion further comprises a non-breathable sheet on a surface of the second sheet opposite to the first sheet, wherein the heap flap portion has a cold feel component at a portion other than the skin- To < RTI ID = 0.0 > J8. &Lt; / RTI >

[J10]

The absorbent article according to any one of claims 1 to 9, wherein the hip flap portion has a color of a one-color system.

1: absorbent article
2:
3: side flap portion
5: Heap flap portion
6: liquid permeable layer
7: liquid-impermeable layer
8: Absorbent layer
11: Skin contact surface
12: first sheet
13: second sheet
14: Non-breathable sheet
15, 16, 17:
21, 24, 26:
22: opening
23, 25: seal part
31, 33: convex portion
32, 34:
35: Folding
41: end

Claims

An absorbent article having a body portion extending in the longitudinal direction and a hip flap portion extending outwardly in the width direction from the body portion,
Wherein the hip flap portion includes a first sheet having a skin contact surface and a second sheet disposed on the wearer's side than the first sheet,
Wherein the first sheet is a nonwoven fabric having a concavo-convex structure including a concave portion and a convex portion on the skin contact surface and has a compression yield of 0.3 gf · cm / cm 2 or more measured from the skin contact surface side,
Wherein the second sheet has a compression amount greater than the compression amount of the first sheet,
Wherein the concave portion is a groove portion extending in the longitudinal direction and includes a groove portion reaching the outer edge of the absorbent article at two or more places.

The absorbent article according to claim 1, wherein the second sheet has a compression yield of 0.7 gf · cm / cm 2 or more.

The absorbent article according to any one of claims 1 to 3, wherein the second sheet has a compression resilience of at least 40%.

The absorbent article as set forth in claim 1 or 2, wherein the first sheet has a planar air permeability of not less than 0.50 m 3 / m 2 / min.

The absorbent article as set forth in claim 1 or 2, wherein the fiber density of the concave portion of the first sheet is lower than the fiber density of the convex portion of the first sheet.

The absorbent article as set forth in claim 1 or 2, wherein the content ratio of the thickness direction fibers in the concave portion of the first sheet is lower than the content ratio of the thickness direction fibers in the convex portion of the first sheet .

The absorbent article as set forth in claim 1 or 2, wherein the first sheet contains thermoplastic resin fibers, and the crossing portions of the thermoplastic resin fibers are thermally fused.

3. The absorbent article according to claim 1 or 2, wherein the hip flap portion further comprises a non-breathable sheet on a surface of the second sheet opposite to the first sheet, Wherein the absorbent article has a cold feeling component in a portion of the absorbent article.

The absorbent article as set forth in claim 1 or 2, wherein the hip flap portion has a color of a one-color system.

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