WO2016088400A1

WO2016088400A1 - Absorbent article

Info

Publication number: WO2016088400A1
Application number: PCT/JP2015/069697
Authority: WO
Inventors: 高橋　雄二; 俊幸谷尾; 智之藤田
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-12-01
Filing date: 2015-07-08
Publication date: 2016-06-09
Also published as: CN106999307B; MY163828A; JP2016104095A; CN106999307A; JP6005124B2; KR20170069289A; KR101785900B1

Abstract

The purpose of the present disclosure is to provide an absorbent article equipped with hip flap parts having excellent fitness and air permeability. The absorbent article according to the present disclosure is configured as follows. An absorbent article (1) having a main body part (2) which extends in the length direction (L) and hip flap parts (5) each of which extends outward in the width direction (W) from the main body part (2), said absorbent article (1) being characterized in that each of the hip flap parts (5) includes a first sheet (12) having a skin-contacting surface (11) and a second sheet (13) arranged on the clothing side relative to the first sheet (12), the first sheet (12) is a non-woven fabric having an irregular surface structure including depressed parts (33) and projected parts (34) on the skin-contacting surface (11) and has a compression workload of 0.3 gf·cm/cm² or more as measured from the skin-contacting surface (11) side, and the second sheet (13) has a larger compression workload than that of the first sheet (12).

Description

Absorbent articles

This disclosure relates to absorbent articles.

Generally, an absorbent article such as a sanitary napkin absorbs and retains body fluids such as menstrual blood by including a liquid-permeable layer, a liquid-impermeable layer, and an absorbent layer therebetween. In addition, in order to prevent body fluids such as menstrual blood from leaking around the absorbent article and adhere to the wearer's clothes, the absorptivity provided with a hip flap part extending outward in the width direction from the absorbent body Articles are known (Patent Document 1).

As described in Patent Document 1, the absorbent article having a hip flap part is larger than one having no hip flap part in order to prevent body fluid such as menstrual blood from adhering to the wearer's clothing. Is formed. Further, as described in Patent Document 1, the hip flap part is also known to have three layers of a side sheet, a back sheet, and an intermediate layer therebetween.

JP 2014-36833 A

The absorbent article having the hip flap part is difficult to follow the shape and movement of the wearer's body, and there is room for improvement from the viewpoint of fit. Moreover, the absorbent article which has a hip flap part was inferior to the breathability of a hip flap part, and there existed a tendency for a wearer's buttocks to feel uncomfortable.
Therefore, this indication aims at providing an absorptive article which has a hip flap part excellent in fit nature and breathability.

The present disclosure is an absorbent article having a main body portion extending in the longitudinal direction and a hip flap portion extending outward in the width direction from the main body portion, wherein the hip flap portion has a skin contact surface. A first sheet and a second sheet disposed on the clothing side of 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 The compression work is 0.3 gf · cm / cm ² or more measured from the skin contact surface side, and the second sheet has a compression work larger than the compression work of the first sheet. The absorbent article characterized by this was discovered.

The absorbent article of the present disclosure has a hip flap portion that is excellent in fit and breathability.

FIG. 1 is a front view of an absorbent article 1, specifically a sanitary napkin, according to one of the embodiments of the present disclosure. FIG. 2 is a rear view of the absorbent article 1 shown in FIG. FIG. 3 is an end view taken along the line III-III in FIG. FIG. 4 is a front view in which the top sheet 2 and the first sheet 12 are separated from the absorbent article 1 shown in FIG. FIG. 5 is an enlarged perspective view of the hip flap 5 of the absorbent article 1 shown in FIG.

[Definition]
[Recesses and protrusions]
In this specification, a recessed part and a convex part are divided by the intermediate point of those height. That is, a portion higher than the middle point between the top of the convex portion and the bottom of the concave portion is a convex portion, and a portion lower than the middle point is a concave portion. The same applies to the flange and the groove.

The absorbent article of the present disclosure will be described in detail below with reference to the drawings as appropriate.
FIG. 1 is a front view of an absorbent article 1, specifically a sanitary napkin, according to one of the embodiments of the present disclosure. FIG. 2 is a rear view of the absorbent article 1 shown in FIG. FIG. 3 is an end view taken along the line III-III in FIG. FIG. 4 is a front view in which the top sheet 2 and the first sheet 12 are separated from the absorbent article 1 shown in FIG. FIG. 5 is an enlarged perspective view of the hip flap 5 of the absorbent article 1 shown in FIG.

The absorbent article 1 of the present embodiment has a longitudinal direction L and a width direction W, a main body portion 2 extending in the longitudinal direction L, and a pair of hips extending from the main body portion 2 to the outside in the width direction W. And a flap portion 5. The pair of hip flaps 5 is disposed behind the absorbent article 1 and is in contact with the rear end of the absorbent article 1 in the longitudinal direction L. The absorbent article 1 of the present embodiment also has a pair of side flap portions 3 disposed from the center in the longitudinal direction L of the absorbent article 1.

The main body 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 hip flap portions 5 of the absorbent article 1 includes a first sheet 12 having a skin contact surface 11, a second sheet 13 disposed closer to the clothing side than the first sheet 12, and a clothing contact surface. A non-breathable sheet 14. The pair of side flap portions 3 also has the same configuration as the hip flap portion 5.

In the absorbent article 1 of the present embodiment, the main body 2 has an adhesive portion 15 fixed to the liquid-impermeable layer 7, and the absorbent article 1, specifically, the main body 2 is connected to the adhesive portion 15. And is fixed to the inside of the wearer's clothes.

The pair of side flap portions 3 has a pair of adhesive portions 16 fixed to the non-breathable sheet 14, and the absorbent article 1, specifically, the pair of side flap portions 3 is a liquid-impermeable layer. After being bent to the 7th side, it is fixed to the outside of the wearer's clothes through a pair of adhesive portions 16.
The pair of hip flap portions 5 has a pair of adhesive portions 17 fixed to the non-breathable sheet 14, and the pair of hip flap portions 5 are not bent and are interposed via the pair of adhesive portions 17. It is fixed inside the wearer's clothes.

The absorbent article 1 of the present embodiment is formed on the squeezed portion 21 formed on the main body portion 2 by squeezing the liquid permeable layer 6 and the absorbent layer 8, and the liquid permeable layer 6 and the absorbent layer 8. It is formed by squeezing the opening 22 penetrating them, the liquid permeable layer 6 and the liquid impermeable layer 7, and has a seal portion 23 for sealing the outer edge of the absorbent article 1. In addition, the seal part 23 is also a pressing part.

The pair of hip flap portions 5 includes a squeezing portion 24 formed by squeezing the first sheet 12 having the skin contact surface 11, the second sheet 13, and the air-impermeable sheet 14. The pair of hip flap portions 5 is formed by pressing the first sheet 12, the non-breathable sheet 14, and the desired second sheet 13, and is a seal for sealing the outer edge of the absorbent article 1. Part 25. Note that 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 is formed by squeezing the first sheet 12 and the non-breathable sheet 14 and has a seal portion 25 for sealing the outer edge of the absorbent article 1.

In this embodiment, as shown in FIG. 3, the liquid permeable layer 6 of the main body 2 and the first sheet 12 of the hip flap 5 are continuous and formed from a single sheet. Moreover, the liquid-impermeable layer 7 of the main body 2 and the non-breathable sheet 14 of the hip flap 5 are continuous, and are formed from a single sheet. The same applies to the first sheet 12 of the side flap portion 3 and the air-impermeable sheet 14 of the side flap portion 3.

The absorbent article 1 of the present embodiment has a folded portion 35 by folding the liquid permeable layer 6 twice, and has a squeezed portion 26 formed by squeezing the folded portion 35. A part of the folded portion 35 forms a leak-proof wall for preventing the absorbed body fluid from flowing from the main body portion 2 toward 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 2 has a plurality of protrusions 31, which are a plurality of eaves extending in the longitudinal direction L, and a plurality of protrusions 31. It is a nonwoven fabric which has the recessed part 32 which is a groove part. Further, the first sheet 12 of the hip flap portion 5 includes a plurality of convex portions 33 extending in the longitudinal direction L and a plurality of concave portions 34 disposed between the convex portions 33 and the convex portions 33. It is the nonwoven fabric which has. The same applies to the side flap portion 3.

In the absorbent article of the present disclosure, the first sheet has a concavo-convex structure including a concave portion and a convex portion on the skin contact surface. When the first sheet has an uneven structure on the skin contact surface, the air permeability in the planar direction of the skin contact surface of the first sheet is excellent. Moreover, since the first sheet has an uneven structure on the skin contact surface, the first sheet can be deformed following the three-dimensional shape of the wearer's body, and the first sheet and the hip flap part are Excellent fit.

The groove is preferably a groove extending in a predetermined direction, and the protrusion is preferably a flange extending in a predetermined direction. Examples of the predetermined direction include the longitudinal direction and the width direction of the absorbent article.

The difference in height between the top of the convex part and the bottom of the concave part is preferably 0.3 to 2.0 mm. This is from the viewpoint of the breathability and touch of the first sheet.
In addition, the height of the top part of a convex part and the bottom part of a recessed part is measured using a two-dimensional laser displacement meter. Examples of the two-dimensional laser displacement meter include a high-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by Keyence Corporation.

For example, in FIG. 5, the first sheet has, on the skin contact surface 11, convex portions 33 as a plurality of ridges extending in the longitudinal direction L and concave portions 34 as a plurality of groove portions. Excellent air permeability in the longitudinal direction L. Moreover, in FIG. 5, since the 1st sheet | seat 12 has the convex part 33 as several collar parts extended in the longitudinal direction L in the skin contact surface 11, and the recessed part 34 as several groove part, it is the 1st sheet | seat. 12 can follow the three-dimensional shape of the wearer's body, particularly the three-dimensional shape in the width direction of the wearer, and the first sheet 12 and the hip flap portion 15 are excellent in 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 reaching the outer edge of the absorbent article in at least two places. By doing so, the groove serves as an air passage having two vents at the outer edge of the absorbent article, so that even if the absorbent article is in close contact with the wearer's body, Excellent air permeability in the planar direction of the skin contact surface of one sheet.

For example, in FIG. 5, the concave portion 34 that is a groove portion is disposed between the convex portions 33 that are flange portions, and the concave portion 34 that is a groove portion extends in the longitudinal direction L, and an end portion 41 of the concave portion 34. The outer edge of the absorbent article 1 has been reached. Therefore, since the recessed part 34 which is a groove part plays the role of the ventilation path which has two vent holes (end part 41), even if it is a case where the absorbent article 1 closely_contact | adheres to a wearer's body, the 1st sheet | seat 12 is provided. However, the air permeability in the planar direction is excellent.

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

Note that the hip flap portion may include an embossed portion, and the concave portion and the embossed portion may partially overlap. This is because the hip flap portion has a continuous embossed portion or an intermittent but close embossed portion, whereby the first sheet is excellent in air permeability in the plane direction. However, since the embossed portion tends to be inferior in air permeability in the thickness direction and hard as described above, the amount is preferably small.

In the absorbent article of the present disclosure, when the first sheet is measured from the skin contact surface side, 0.3 gf · cm / cm ² or more, preferably 0.5 gf · cm / cm ² or more, more preferably It has a compression work of 0.7 gf · cm / cm ² or more, and more preferably 0.8 gf · cm / cm ² or more. When the first sheet has the above lower limit of the work of compression, the first sheet has a predetermined gap, and the air permeability in the planar direction and the thickness direction in the first sheet is excellent. Moreover, when a compression work amount has the said minimum, a 1st sheet | seat is soft and can fit a wearer's body.

In the absorbent article of the present disclosure, the first sheet is preferably 2.0 gf · cm / cm ² or less, more preferably 1.6 gf · cm / cm ² or less, when measured from the skin contact surface side. More preferably, it has a compression work of 1.4 gf · cm / cm ² or less. When the first sheet has the above upper limit of the work of compression, the concavo-convex structure of the first sheet is easily held when pressure is applied. When the value of the compression work is increased, the softness of the first sheet is improved, but it is difficult to maintain the uneven structure.

The amount of compression work and the compression resilience described below are measured by KES-FB3 manufactured by Kato Tech Co., Ltd. according to KES (Kawabata's Evaluation System for Fabrics).
The compression work WC is a value indicating compressibility, that is, ease of compression. The larger the value is, the easier it is to compress, that is, softer, and the smaller the value is, the harder it is to compress, that is, harder. Means that. Further, the compression resilience RC is more excellent in compression recoverability as the numerical value approaches 100%.

The measurement conditions for KES-FB3 are as follows.
・ SENS: 2
・ Speed: 50 seconds / mm
・ Stroke: 5mm / 10V
・ Pressure area: 2cm ²
・ Intake interval: 0.1 seconds ・ Upper load: 50 g / cm ²
・ Repetition count: 1

In the absorbent article of the present disclosure, the first sheet is 0.50 m ³ / m ² / min or more, more preferably 0.60 m ³ / m ² / min or more, and further preferably 0.75 m ³ / m ² / min. As described above, and still more preferably, it has a planar air permeability of 0.90 m ³ / m ² / min or more. When the first sheet has the above-described air permeability in the planar direction, the first sheet is excellent in air permeability in the planar direction, and thus the wearer is less likely to feel discomfort such as stuffiness.

The air permeability in the planar direction of the sample is measured according to the following procedure.
(1) The sample is allowed to stand for 24 hours at 20 ° C. and 60% RH.
(2) A Kato Tech Co., Ltd. breathability tester, KES-F8-AP1, is prepared under the conditions of 20 ° C. and 60% RH.
(3) A chamber is set in the air permeability tester.
(4) The sample is cut into a sample piece having a size of about 12 cm × about 12 cm and placed on the air permeability tester.

(5) An acrylic plate of 15 cm × 15 cm is placed on the sample so that a pressure of 32.6 mPa is applied to the sample, and the ventilation resistance value of the sample piece is measured.
(6) The above measurement is repeated a total of 5 times, and the average value is adopted as the ventilation resistance value AR (kPa · s / m) of the sample.
(7) The ventilation resistance value AR is calculated as follows:
AP (m ³ / m ² /min)=7.473/AR
Accordingly, the air permeability AP (m ³ / m ² / min) is converted into the air permeability AP (m ³ / m ² / min) of the sample.

In the absorbent article of the present disclosure, the second sheet has a compression work larger than the compression work measured from the skin contact surface side of the first sheet, and the second sheet is the first sheet, More preferably 0.10 gf · cm / cm ² or more, more preferably 0.15 gf · cm / cm ² or more, and more preferably 0.20 gf · cm / cm than the compression work measured from the skin contact surface side. It has a large compression work of cm ² or more.
In addition, it is preferable that the compression work amount of a 2nd sheet | seat is measured from a wearer side. This is from the viewpoint of protecting the shape of the first sheet.

When 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, when pressure is applied to the first sheet, it is more than the first sheet. First, the second sheet is positively deformed (collapsed), so that the shape of the first sheet, in particular, the uneven structure of the skin contact surface of the first sheet can be maintained even when the pressure is applied. In other words, the air permeability in the planar direction and the thickness direction of the first sheet is maintained even when the pressure is applied. Moreover, the fitting property of an absorbent article improves because a 2nd sheet | seat positively deform | transforms.

In addition, the second sheet has a compression work larger than the compression work measured from the skin contact surface side of the first sheet. This indicates that the second sheet is compressed more than 0.3 gf · cm / cm ^2. It means that the second sheet has a predetermined void. Therefore, mainly in a state where no pressure is applied or in a state where the pressure is low, the second sheet has a planar direction (longitudinal direction L and width direction W in FIG. 5) and a thickness direction (thickness in FIG. 5). The air permeability in the direction T) is excellent.

In the absorbent article of the present disclosure, the second sheet is preferably 0.7 gf · cm / cm ² or more, more preferably 0.8 gf · cm / cm ² or more, and even more preferably 0.9 gf · cm / cm ^2. It has the above compression work. This is from the viewpoint of protecting the shape of the skin contact surface of the first sheet and improving the fit of the hip flap portion.

In the absorbent article of the present disclosure, the second sheet preferably has a compression resilience of 40% or more, more preferably 45% or more, and even more preferably 50% or more. Even when the second sheet has the above-described compression resilience and pressure is applied and the thickness of the second sheet is reduced, the thickness of the second sheet is quickly increased when the pressure is not applied. Can be thicker. As a result, the second sheet can have the action of a pump that discharges air inside the hip flap portion and replaces 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 recessed part of the 1st sheet | seat is excellent in the air permeability of the thickness direction of a 1st sheet | seat, and, as a result, a wearer is hard to memorize unpleasant feelings, such as stuffiness.

In the absorbent article of the present disclosure, it is preferable that the content rate of the thickness direction oriented fibers in the concave portion of the first sheet is lower than the content rate of the thickness direction oriented fibers in the convex portion of the first sheet. By doing so, the bottom part of a recessed part can be made deeper, a 1st sheet | seat is excellent in the air permeability of a planar direction, and a wearer is hard to memorize unpleasant feelings, such as stuffiness.

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

The measuring method of the content rate of thickness direction orientation fiber is as follows.
(1) A sample is cut and a sample piece is prepared.
(2) Using a digital microscope VHX-100 manufactured by Keyence Corporation, take an enlarged image from a direction perpendicular to the cut surface of the sample piece. The magnified image is an image magnified to a magnification that allows measurement of 50 or more fibers, and the magnification is, for example, 20 to 50 times. When taking an enlarged image, focus is set on the fiber nearest to the cut surface of the sample piece (excluding the fiber that has irregularly jumped forward), and the shooting depth (depth) is set. The enlarged image is created on the PC screen as a 3D image.

(3) A 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 +45 degrees to -45 degrees with respect to the thickness direction of the nonwoven fabric sample. The number of fibers oriented at an angle of is counted.
(4) The ratio of the number of counted fibers to the number of all fibers in the measurement range is calculated.
(5) (1) to (4) are repeated several times (for example, 3 to 5 times), and the average value is taken as the content of the fiber 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 other than the skin contact surface of the first sheet. The part may have a cooling sensation component. By doing so, a cooling sensation component can permeate | transmit the 1st sheet | seat from the inside of a hip flap part, and can act on a wearer's skin. Since the cooling sensation component is disposed in a portion other than the skin contact surface of the first sheet, it can act on the wearer's skin for a long time with an appropriate strength.

Examples of the cooling sensation component include those known in the art as a cooling sensation agent, such as those acting on a receptor activation channel (TRPM8) in skin nerves, such as menthol (for example, , L-menthol) and derivatives thereof, methyl salicylate, camphor, essential oils derived from plants (for example, mint, eucalyptus), and the like. Moreover, as a functional component which has the said cool feeling function, what lowers | hangs ambient temperature with heat of vaporization, for example, alcohol, for example, methanol and ethanol, are mentioned. The cooling sensation component may be held in a microcapsule.

As a part other than the skin contact surface of the first sheet, the wearer side surface of the second sheet, the inside of the second sheet, the clothes side surface of the second sheet, and the wearer side of the third sheet As well as any combination thereof.

In the absorbent article of the present disclosure, it is preferable that the hip flap portion has a cold color. This is because the breathability of the absorbent article can be appealed from the viewpoint of vision. In addition, in order for the hip flap part to have a cold color, the first sheet, the second sheet, the desired non-breathable sheet, and any combination thereof can have a cold color.
Examples of the cold color include blue colors.

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

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

The basis weight is measured in accordance with “6.2 Mass per unit area (ISO method)” of JIS L 1913: 2010.
The thickness (mm) is measured as follows.
FS-60DS [measurement surface 44 mm (diameter), measurement pressure 3 g / cm ² ] manufactured by Daiei Kagaku Seisakusho Co., Ltd. is prepared and absorbed under standard conditions (temperature 23 ± 2 ° C., relative humidity 50 ± 5%). Pressurize five different parts of the body, measure the thickness of each part 10 seconds after pressurization, and take the average of the five measurements 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 work and the like, and is manufactured using a method known in the art. be able to. For example, the first sheet can be manufactured using the methods described in JP-A-2008-25079, JP-A-2008-23326, JP-A-2009-30218, and the like. Specifically, the first sheet as a nonwoven fabric is jetted of gas onto a web containing thermoplastic resin fibers to form an uneven structure, and then the web having the uneven structure is heat-treated to thermoplastic resin in the web It can be manufactured by heat-sealing the intersection of the fibers.

In the above method, the web is placed on a breathable support member (for example, a net-like support member), and gas (usually air) is continuously jetted onto the upper surface of the web while moving the breathable support member in a predetermined direction. Thus, a concavo-convex structure including a concave portion and a convex portion (a ridge groove structure including a ridge portion and a groove portion) can be formed on the web. Note that the lower surface of the web has a shape along the shape of the breathable support member. For example, when the web placement surface of the net-like support member is flat, the lower surface of the web is substantially flat (therefore, the lower surface of the formed nonwoven fabric is also substantially flat).

A concave portion (groove portion) extending in the moving direction of the air-permeable support member is formed in a region of the upper surface of the web where the gas is injected, and a convex portion (groove portion) is formed between two adjacent concave portions (groove portions). Buttock) is formed. Under the present circumstances, since the fiber of the area | region where gas was injected moves to the both sides of a recessed part (groove part), the basic weight of a convex part (groove part) becomes higher than the basic weight of a recessed part (groove part) normally.

Moreover, the fiber in a web rolls up by the gas bounced back and collided with the non-venting part (for example, wire) of a breathable support member, and a convex part (uneven structure (groove structure)) formed in the web The content ratio of the thickness direction oriented fibers in the heel portion is larger than the content ratio of the thickness direction oriented fibers in the other portions (for example, the recesses (groove portions)). The number of projections (grooves) and recesses (grooves), spacing, basis weight, fiber density, thickness-oriented fiber content, etc. are the number of nozzles, the diameter and pitch, the temperature of the gas injected from the nozzle, and It can be adjusted to a desired range by adjusting the injection amount, web tension, and the like.

In the above method, for example, the work of compression of the formed nonwoven fabric can be adjusted by changing the thickness of the web. For example, by increasing the thickness of the web, the compression work of the formed nonwoven fabric can be increased.
Moreover, in the said method, the air permeability of the planar direction of the nonwoven fabric formed can be made high by deepening the bottom part of a recessed part, expanding the pitch of a convex part, etc.

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 increasing the amount of gas injected from the nozzle. In addition, the nonwoven fabric in which the fiber density of the recesses is lower than the fiber density of the protrusions can be produced by, for example, the methods described in JP-A-2008-002034, JP-A-2008-023311, and the like.

Further, the first sheet may be a multilayer sheet including at least two layers and having a gap between the two layers. For example, the first sheet is a multi-layer sheet including an upper fiber sheet and a lower fiber sheet, and a multi-layer sheet in which an upper fiber sheet having a concavo-convex structure including a concave portion and a convex portion is joined to a substantially flat lower fiber sheet. It can be a layer sheet.

The manufacturing method of the said multilayer sheet is well-known, For example, it is an upper layer between the 1st roll which has uneven | corrugated shape on the surface, and the 2nd roll which has uneven | corrugated shape which meshes with the 1st roll on the surface. An uneven structure can be formed on the upper sheet through the sheet, the upper sheet can be laminated on the lower sheet, and then the upper sheet and the lower sheet can be joined.

Furthermore, the first sheet is, for example, a multilayer sheet including an upper layer sheet and a lower layer sheet, and a composite sheet in which an upper layer sheet having a concavo-convex structure including a concave portion and a convex portion is bonded onto a lower layer sheet that is an apertured film. It can be a layer sheet.

The manufacturing method of the said multilayer sheet is well-known, for example, an upper layer sheet carries a web on the air-permeable support member which has an uneven | corrugated shape, blows hot air on the said web, and shape-treats it in a web. By fusing the fibers, an upper layer sheet that is a nonwoven fabric having a concavo-convex structure can be formed.
The said multilayer sheet can be formed by laminating | stacking the said upper layer sheet | seat on the lower layer sheet | seat which is an apertured film, and joining them with an adhesive agent, for example.

In the absorbent article of the present disclosure, the second sheet has a compression work larger than that of the first sheet, and is particularly limited as long as it has a compression resilience of 40% or more. It can be adopted without. The second sheet is preferably a nonwoven fabric, and more preferably an air-through nonwoven fabric or a spunlace nonwoven fabric. The second sheet can be selected from commercially available nonwoven fabrics.

When the second sheet is a non-woven fabric, for example, when a thick sheet is selected, the compression work tends to increase. Moreover, for example, if the fibers constituting the nonwoven fabric are harder, the compression resilience tends to increase.

The second sheet may also be a non-woven fabric having a concavo-convex structure including a concave portion and a convex portion. This is because the air permeability in the planar direction is excellent. Examples of the nonwoven fabric having a concavo-convex structure including a concave portion and a convex portion include the same as the first sheet.

Hereinafter, although an example is given and this indication is explained, this indication is not limited to these examples.
[Production Example 1]
(1) Production of web Composite fiber (average fineness: 1.8 dtex, average fiber length: 45 mm) having polyethylene terephthalate as a core component and polyethylene as a sheath component, polyethylene terephthalate as a core component, and polyethylene as a sheath component From the mixture (mass ratio 1: 1) with the composite fiber (average fineness: 2.4 dtex, average fiber length: 45 mm), the web No. 1 (basis weight: 25 g / m ² ) was formed.

(2) Fabrication of nonwoven web No. 1 to 1st sheet No. 1 having a ridge groove structure including a ridge portion and a groove portion according to the method described in Japanese Patent Application Laid-Open No. 2008-23311. 1 was formed.
Various settings in the nonwoven fabric manufacturing apparatus used are as follows.
Diameter of injection port 332: 1.0 mm (perfect circle)
The pitch of the injection holes 322: 3.0 mm
Injection gas temperature: 310 ° C
Air flow rate per jet port: 5 L / min Web conveyance speed: speed 100 m / min Breathable support member 310 (net-like support member): 70 mesh Heat treatment by heater unit 340: Heat treatment temperature 140 ° C., passing air speed Processed for 1.2 seconds at 1.2 m / sec. The characteristics of 1 are shown in Table 1.

[Production Example 2]
Composite fibers with polyethylene terephthalate as the core component and polyethylene as the sheath component (average fineness: 3.4 dtex, average fiber length: 40 mm), and composite fibers with polyethylene terephthalate as the core component and polyethylene as the sheath component ( The first sheet No. was changed according to Production Example 1 except that the mixture was changed to a mixture (mass ratio 1: 1) with an average fineness: 3.4 dtex, average fiber length: 50 mm). 2 was formed.
First sheet No. The characteristics of 2 are shown in Table 1.

[Production Example 3]
A commercially available SMS nonwoven fabric was bonded to the first sheet no. Used as 3. First sheet No. The characteristics of 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 are selected, and the second sheet No. 2 is selected. Used as 1.

[Production Example 5]
From the commercially available air-through nonwoven fabric, those having the characteristics shown in Table 1 are selected, and the second sheet No. 2 is selected. Used as 2.

Commercially available SMS non-woven fabric, the second sheet No. Used as 3. Second sheet No. The characteristics of 3 are shown in Table 1.

[Examples 1 and 2, and Comparative Examples 1 to 3]
Using the first sheet and the second sheet described in Table 1, the absorbent article No. 1 shown in FIG. 1-No. 5 was produced. In Comparative Example 2, there is no second sheet, and in Comparative Example 3, the first sheet is the second sheet No. 1 and there is no second sheet.
Absorbent article no. 1-No. When 5 was worn by a plurality of volunteers and evaluated according to the following criteria, results generally shown in Table 1 were obtained.

[Fitness]
○: I did not feel the presence of the hip flap part.
Δ: When moving, the presence of the hip flap part was felt.
×: The presence of the hip flap part was always felt.
[Steaminess]
○: The hip flap part did not feel stuffy.
(Triangle | delta): Depending on operation | movement, the hip flap part might feel stuffiness.
X: The hip flap part felt stuffy.

Specifically, the present disclosure relates to the following J1 to J10.
[J1]
An absorbent article having a main body portion extending in the longitudinal direction and a hip flap portion extending outward in the width direction from the main body portion,
The hip flap part includes a first sheet having a skin contact surface, and a second sheet disposed on the clothing side of the first sheet,
The first sheet is a nonwoven fabric having a concavo-convex structure including concave and convex portions on the skin contact surface, and a compression work of 0.3 gf · cm / cm ² or more measured from the skin contact surface side. And the second sheet has a compression work greater than the compression work of the first sheet,
The said absorbent article characterized by the above-mentioned.

[J2]
The absorbent article according to J1, wherein the second sheet has a compression work 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 40% or more.

[J4]
The absorbent article according to any one of J1 to J3, wherein the first sheet has a planar air permeability of 0.50 m ³ / m ² / min or more.
[J5]
The absorbent article according to any one of J1 to J4, wherein the concave portion includes a groove portion extending in a predetermined direction and reaching the outer edge of the absorbent article in at least two places.

[J6]
The absorbent article according to any one of J1 to J5, 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 absorptivity according to any one of J1 to J6, wherein a content ratio of the thickness direction oriented fibers in the concave portion of the first sheet is lower than a content ratio of the thickness direction oriented fibers in the convex portion of the first sheet. Goods.

[J8]
After the first sheet forms a concavo-convex structure by injecting gas onto the web containing thermoplastic resin fibers, the web having the concavo-convex structure is heat-treated to heat the intersections of the thermoplastic resin fibers in the web. The absorbent article according to any one of J1 to J7, which is a nonwoven fabric produced by fusing.

[J9]
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 cooled on a portion other than the skin contact surface of the first sheet. The absorbent article according to any one of J1 to J8, which has a sensitive component.
[J10]
The absorbent article according to any one of J1 to J9, wherein the hip flap part has a cold color.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Main body part 3 Side flap part 5 Hip flap part 6 Liquid-permeable layer 7 Liquid-impermeable layer 8 Absorbing layer 11 Skin contact surface 12 1st sheet 13 2nd sheet 14

Non-breathable sheet

15,16 , 17

Adhesive parts

21, 24, 26 Press part 22

Opening part

23, 25

Seal part

31, 33

Convex part

32, 34 Concave part 35 Folding part 41 End part

Claims

An absorbent article having a main body portion extending in the longitudinal direction and a hip flap portion extending outward in the width direction from the main body portion,
The hip flap part includes a first sheet having a skin contact surface, and a second sheet disposed on the clothing side of the first sheet,
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 a compression work of 0.3 gf · cm / cm 2 or more measured from the skin contact surface side. And the second sheet has a compression work greater than the compression work of the first sheet,
The said absorbent article characterized by the above-mentioned.
The absorbent article according to claim 1, wherein the second sheet has a compression work of 0.7 gf · cm / cm 2 or more.
The absorbent article according to claim 1 or 2, wherein the second sheet has a compression resilience of 40% or more.
The absorbent article according to any one of claims 1 to 3, wherein the first sheet has a planar air permeability of 0.50 m 3 / m 2 / min or more.
The absorbent article according to any one of claims 1 to 4, wherein the concave part includes a groove part extending in a predetermined direction and reaching the outer edge of the absorbent article in at least two places.
The absorbent article according to any one of claims 1 to 5, wherein a fiber density of the concave portion of the first sheet is lower than a fiber density of the convex portion of the first sheet.
The content of the thickness direction oriented fibers in the concave portion of the first sheet is lower than the content of the thickness direction oriented fibers in the convex portion of the first sheet. Absorbent article.
After the first sheet forms a concavo-convex structure by injecting gas onto the web containing thermoplastic resin fibers, the web having the concavo-convex structure is heat-treated to heat the intersecting portions of the thermoplastic resin fibers in the web. The absorbent article according to any one of claims 1 to 7, which is a non-woven fabric produced by fusing.
The hip flap part further includes a non-breathable sheet on a surface of the second sheet opposite to the first sheet, and the hip flap part is cooled on a portion other than the skin contact surface of the first sheet. The absorbent article according to any one of claims 1 to 8, which has a sensitive component.
The absorbent article according to any one of claims 1 to 9, wherein the hip flap part has a cold color.