WO2022044895A1

WO2022044895A1 - Absorbent article and packaging

Info

Publication number: WO2022044895A1
Application number: PCT/JP2021/030101
Authority: WO
Inventors: 貴史白川; 拓也幸田; 美奈富田
Original assignee: 花王株式会社
Priority date: 2020-08-27
Filing date: 2021-08-18
Publication date: 2022-03-03
Also published as: CN219595004U; JP2022039068A

Abstract

This absorbent article (1) comprises a fastening tape (7), and a fastening region (R1) where the fastening tape (7) can be fastened. A surface that does not face skin has the fastening region (R1) and a region (R2) other than the fastening region, and at least the region (R2) other than the fastening region is formed from an outer layer sheet (5). The average coefficient of friction of the region (R2) other than the fastening region is 0.2 or less. When M1 is the average coefficient of friction of the fastening region (R1), and M2 is the average coefficient of friction of the region (R2) other than the fastening region, the ratio (M1/M2) of M1 to M2 is 0.75 to 1.25.

Description

Absorbent articles and packaging

The present invention relates to an absorbent article and a package.

Absorbent articles comprising a fastening tape and a fastening member to which the fastening tape can be fastened are known. The absorbent article is in a state of being fixed around the wearer's waist by arranging both ends in the vertical direction around the wearer's waist and fastening the fastening tape and the fastening member.
For example, Patent Document 1 describes a paper diaper including a hook member attached to one end of the paper diaper and a lining sheet having a bondability to the hook member, and the lining sheet covers almost the entire surface of the sheet material of the paper diaper. What is pasted on is described.

Further, in Patent Document 2, a target-printed strip sheet indicating the fastening position of the fastening tape is provided with a back sheet that covers the back surface side of the absorber and an outer layer sheet that forms the outermost layer of the diaper body. Disposable diapers placed in between are listed.
Further, Patent Document 3 includes a liquid having a fastening tape which is a male shape member of a hook-and-loop fastener and an exterior sheet which is used as a fastening and wearing female shape member of the fastening tape and which is on the outer surface of the waist circumference portion. Absorbent articles are listed.

Jikkenhei 01-168510 Japanese Patent Application Laid-Open No. 2003-153952 Japanese Patent Application Laid-Open No. 2003-220092

The present invention has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, a crotch portion arranged in the crotch portion of the wearer, and an abdomen extending in the front-rear direction of the crotch portion. It has a side portion and a dorsal portion, and a fastening tape provided on both side edges of the dorsal portion along the vertical direction, and a stopper provided on the ventral side portion to which the fastening tape can be fastened. With respect to an absorbent article having a landing area.
The non-skin facing surface has the anchored region and the region other than the anchored region, and it is preferable that at least the region other than the anchored region is formed by the outer layer sheet.
It is preferable that the average friction coefficient in the region other than the anchorage region is 0.20 or less.
When the average friction coefficient in the anchorage region is M1 and the average friction coefficient in the region other than the anchorage region is M2, the ratio of M1 to M2 (M1 / M2) is 0.75 or more and 1.25 or less. Is preferable.

The present invention also relates to a package containing the absorbent article.
It is preferable that a plurality of the packages are housed in the packaging bag in a state where the fastening regions do not come into contact with each other.

FIG. 1 is a perspective view showing a deployable disposable diaper according to an embodiment of the absorbent article of the present invention. FIG. 2 is a developed plan view schematically showing the skin facing surface side (inner surface side) of the diaper shown in FIG. 1 in the expanded and extended state. FIG. 3 is a sectional view taken along line II-II of FIG. FIG. 4 is a developed plan view schematically showing the non-skin facing surface side (outer surface side) of the diaper shown in FIG. 1 in the expanded and extended state. FIG. 5 is a partially broken view showing a state in which the diaper shown in FIG. 1 is housed in a packaging bag. FIG. 6 is an enlarged plan view of the anchorage region shown in FIG. FIG. 7 is a conceptual diagram for explaining a method of evaluating the ease of taking out a diaper in the embodiment.

Detailed description of the invention

The absorbent articles described in the above-mentioned Patent Documents 1 to 3 have a fastening tape attached to the sheet itself forming the outer surface of the absorbent articles. From the viewpoint of stably maintaining the wearing state of such an absorbent article, it is desired that the fastening tape and the sheet forming the outer surface are securely engaged with each other. From such a viewpoint, it is conceivable that the physical properties of the surface of the sheet forming the outer surface have a high engaging force, but if the sheet has a high engaging force, the texture of the outer surface of the absorbent article is impaired. In addition, there is a risk that the absorbent article may be caught when it is taken out from the packaging bag, making it difficult to take the absorbent article out of the packaging bag.

Therefore, the present invention relates to an absorbent article that can eliminate the drawbacks of the above-mentioned prior art.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiment. 1 to 4 show a deployable disposable diaper (hereinafter, also simply referred to as a "diaper") which is an embodiment of the absorbent article of the present invention.
The diaper 1 shown in FIG. 2 corresponds to the front-back direction of the wearer in the deployed and extended state, and is orthogonal to the vertical direction X extending from the ventral side of the wearer to the dorsal side through the crotch portion and the vertical direction X. It has a lateral direction Y to be used. The diaper 1 has a ventral portion A arranged on the ventral side of the wearer, a dorsal portion B arranged on the dorsal side, and a crotch portion C arranged on the crotch portion when the diaper 1 is worn. That is, the ventral portion A and the dorsal portion B extend in front of and behind the inseam C. The ventral portion A, the inseam C, and the dorsal portion B are regions in which the diaper 1 is divided into three equal parts in the total length in the vertical direction X, and extends continuously in the front-back direction of the wearer. .. The inseam C has an excretion portion facing portion (not shown) that is arranged to face the excretion portion of the wearer when the diaper 1 is worn.

In the present specification, the "expanded and stretched state" of the diaper 1 means that the diaper 1 is in the unfolded state, and the elastic member of each part of the unfolded diaper 1 is stretched to eliminate the influence of the elastic member. It means the state of being expanded until it becomes the same as the dimensions when it is expanded in a flat state.
Further, the "skin facing surface" is a surface facing the wearer's skin when wearing the diaper when focusing on the diaper or its constituent members (for example, an absorber), and the "non-skin facing surface" is the diaper. This is the surface that faces the wearer's skin when worn. That is, the skin-facing surface is the surface relatively close to the wearer's skin, and the non-skin-facing surface is the surface relatively far from the wearer's skin. "When worn" and "wearing state" refer to a state in which the proper wearing position of the diaper is maintained and worn.

As shown in FIG. 3, the diaper 1 is arranged between a liquid-permeable surface sheet 2, a liquid-impermeable (including water-repellent) leak-proof sheet 3, and the surface sheet 2 and the leak-proof sheet 3. It is provided with a liquid-retaining absorbent body 4, and these members constitute the absorbent main body 10. In FIG. 3, for convenience of explanation, the leak-proof cuff 16 described later is shown in an upright state.
In the absorbent body 10, the surface sheet 2 is arranged on the skin-facing surface side of the absorbent body 4. The surface sheet 2 comes into contact with the wearer's skin in the wearing state.
The surface sheet 2 and the leak-proof sheet 3 each have a larger size than the absorber 4, and extend outward from the outer peripheral edge of the absorber 4. Each longitudinal direction (longitudinal direction X) both end edge of the leak-proof sheet 3 in the present embodiment substantially coincides with the longitudinal direction (longitudinal direction X) both end edges of the diaper 1.

The diaper 1 includes a liquid-retaining absorber 4. The absorber 4 shown in FIG. 2 is arranged so that its longitudinal direction coincides with the vertical direction X of the diaper, and extends from the ventral side A to the dorsal side B via the inseam C. The longitudinally bilateral edges of the absorber 4 are located inward of the longitudinal X bilateral edges of the diaper 1.
As shown in FIG. 3, the absorber 4 is formed by coating an absorbent core 4a having an absorbent performance on a liquid-permeable core wrap sheet 4b.

The diaper 1 includes a pair of leakage-

proof cuffs

16 and 16 arranged along both sides of the absorbent body 10 along the vertical direction X.
The leak-proof cuff 16 includes a thread-shaped elastic member for forming a cuff 16a and a water-repellent and breathable sheet for forming a cuff 16b. The cuff-forming elastic member 16a extends in the vertical direction X at the free end of the leak-proof cuff 16. The leak-proof cuff 16 stands up toward the wearer's skin side at least in the inseam C due to the contraction of the elastic member 16a for forming the cuff, whereby excrement such as urine flows out in the lateral direction Y. Suppress that.

As shown in FIG. 3, the diaper 1 of the present embodiment includes an outer layer sheet 5 arranged on the non-skin facing surface side of the absorbent main body 10, that is, on the non-skin facing surface side of the leak-proof sheet 3. As shown in FIG. 4, the outer layer sheet 5 mainly forms the outer surface (non-skin facing surface) of the diaper 1 and extends from the ventral side A to the dorsal side B via the inseam C in the vertical direction X. It is postponed. The outer layer sheet 5 forms the outer shape of the diaper 1 in the expanded and extended state, and the peripheral edge of the outer layer sheet 5 forms the contour lines of the ventral side portion A, the inseam portion C, and the dorsal side portion B, respectively. There is. In FIG. 4, for convenience of explanation, the cuff forming elastic member 16a and the leg gather forming elastic member 15 described later are not shown.
As shown in FIGS. 2 and 4, the contour of the diaper 1 of the present embodiment constricts the central side of the vertical direction X, that is, the inseam C and the parts of the ventral part A and the dorsal part B on the crotch C side. The end side of the vertical direction X in each of the ventral side portion A and the dorsal side portion B projects laterally Y outward from the portion on the crotch portion C side. In other words, the diaper 1 of the present embodiment has a wide portion on each of the ventral side portion A and the dorsal side portion B, and has a constricted portion narrower than the wide portion between these wide portions in the vertical direction X. is doing.

The outer layer sheet 5 extends outward in the horizontal direction Y from each of both side edges of the absorber 4 along the vertical direction X, and side flaps together with the leak-proof sheet 3 and the cuff forming sheet 16b constituting the leak-proof cuff 16. Part SF is formed. The side flap portion SF is a portion made of a sheet member extending outward in the horizontal direction Y from each of both side edges of the absorber 4 along the vertical direction X. The seat member constituting the side flap portion SF extends from the ventral side portion A to the dorsal side portion B via the crotch portion C, and extends laterally Y outward from each of both side edges of the absorber 4. In the extending portion, they are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal.

The diaper 1 of the present embodiment is located on the end side of each of the ventral portion A and the dorsal portion B in the vertical direction X, specifically, before and after the wide portion of the ventral portion A and the dorsal portion B in the vertical direction X. In the region between the ends, it has a waist flap portion WF extending outward in the vertical direction X or outward in the horizontal direction Y from the peripheral edge of the absorber 4 (see FIG. 2). The waist flap portion WF is a portion formed of a member extending outward in the vertical direction X or outward in the horizontal direction Y from the peripheral edge of the absorber 4 on the end side of the dorsal side portion B in the vertical direction X. .. In the present embodiment, the waist flap portion WF is composed of a cuff forming sheet 16b extending outward from the peripheral edge of the absorber 4, a leakage-proof sheet 3, and an outer layer sheet 5. These sheets are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at a portion extending from the peripheral edge of the absorber 4. The waist flap portion WF corresponds to the waist circumference of the wearer when the diaper 1 is worn. Both sides of the waist flap portion WF in the lateral direction Y are also front and rear ends of the side flap portion SF in the vertical direction X.

In the diaper 1 of the present embodiment, as shown in FIG. 2, the elastic members 15 for forming leg gathers are provided on both side portions of the diaper 1 along the vertical direction X, specifically, the pair of side flap portions SF and SF. Is arranged in an extended state so as to extend in the vertical direction X through the lower crotch C. Due to the contraction of the elastic member 15, leg gathers are formed on the left and right portions arranged around the wearer's legs, that is, on both sides of the diaper 1 in the vertical direction X. In the present embodiment, the leg gather forming elastic member 15 is fixed in an extended state along the vertical direction X between the cuff forming sheet 16b and the leakage-proof sheet 3 in the side flap portion SF.

As shown in FIGS. 1 and 2, the diaper 1 is provided with a pair of

fastening tapes

7 and 7 on both side edges of the dorsal portion B along the vertical direction X. Each fastening tape 7 is provided so as to extend outward in the lateral direction Y from both side edges of the dorsal portion B along the vertical direction X. One end of each fastening tape 7 on the inner side in the lateral direction Y is fixed to a sheet member constituting the diaper 1, preferably between the sheet members constituting the diaper 1, for example, a leak-proof sheet 3 and an outer layer sheet. It is fixed between 5 and 5 (not shown).
The fastening tape 7 of the present embodiment has a tape base material 70 and an engaging portion 71 fixed to the skin facing surface of the tape base material 70. The engaging portion 71 has an engaging projection on the surface facing the skin. As the engaging portion 71, a male material of a mechanical fastener can be used. The mechanical fastener is composed of a male material in which a large number of engaging protrusions are arranged on the surface and a female material in which a material capable of directly engaging the engaging protrusions is arranged on the surface. A fastener that is made to engage with each other by making surface contact with each other. As the mechanical fastener, various known ones can be used without particular limitation.

The diaper 1 has a fastening region R1 on the non-skin facing surface of the ventral side A to which the engaging portion 71 included in the fastening tape 7 can be detachably fastened. The fastening region R1 of the present embodiment is formed by joining the fastening member 6 including the female material of the mechanical fastener described above to the non-skin facing surface of the outer layer sheet 5. That is, the fastening region R1 of the present embodiment is formed by the fastening member 6 on the outer layer sheet 5 on the ventral side A. The material forming the portion of the fastening member 6 to which the engaging portion 71 is fastened, that is, the material of the female material can be selected according to the shape of the engaging protrusion of the engaging portion 71. As the material of the female material, for example, a loop portion, a mesh portion, or the like, or a non-woven fabric having a high degree of engagement can be used.
The fastening region R1 may be formed of a part of the outer layer sheet 5 composed of a non-woven fabric having a high engagement, and the outer layer sheet 5 is non-skinned as a member separate from the outer layer sheet 5. It may be the fastening member 6 provided on the facing surface.

As shown in FIG. 4, the non-skin facing surface of the diaper 1 has a landing region R1 and a region R2 other than the landing region in the plane direction. Hereinafter, the “region other than the anchoring region” R2 is also referred to as the “outside the anchoring region” R2. The non-fastening outer region R2 is a region in which the engaging portion 71 of the fastening tape 7 is not arranged in the worn state. The fastening outer region R2 may or may not have a fastening ability with the engaging portion 71.
In the present embodiment, the anchorage outer region R2 is a region on the outer side of the peripheral edge of the anchorage region R1.

At least the non-sticking outer region R2 on the non-skin facing surface of the diaper 1 is formed by the outer layer sheet 5. The outer layer sheet 5 may form both the anchoring region R1 and the anchoring outer region R2. In this case, from the viewpoint of facilitating the operation of fastening the fastening tape 7, it is preferable that the fastening region R1 and the non-fastening region R2 are visually distinguishable. Examples of means for making it possible to distinguish between the anchored region R1 and the anchored outer region R2 include a line along the contour of the anchored region R1 and means such as printing on the entire anchoring region R1.

In the diaper 1 of the present embodiment, the average friction coefficient of each of the anchorage region R1 and the anchorage outer region R2 is within the following range. The average coefficient of friction of the outer layer sheet 5 shown below is a physical property of the outer layer sheet 5 on the non-skin facing surface. The method for measuring the average friction coefficient will be described later.
The average friction coefficient M2 of the non-fixed region R2 is 0.20 or less. The average coefficient of friction can be used as an index of the touch of the surface of the object, particularly an index showing the degree of catching when the surface of the object is touched.
When the average friction coefficient in the anchorage region R1 is M1 and the average friction coefficient in the anchorage region R2 is M2, the ratio of M1 to M2 (M1 / M2) is 0.75 or more and 1.25 or less. The ratio M1 / M2 means that the closer it is to 1.00, the closer the degree of catching of the anchored region R1 and the non-attached region R2 is.

In the diaper 1 of the present embodiment, as shown in FIG. 1, the fastening tape 7 is fastened to the fastening region R1, so that the waist opening WH through which the wearer's torso is passed and the wearer's lower limbs are formed. A pair of leg openings LH to be passed is formed and worn by the wearer. The present inventors ensure the engaging force of the fastening tape 7 with the engaging portion 71 in the fastening region R1 by setting the average friction coefficient of the fastening region R1 and the fastening outer region R2 within the above-mentioned range. At the same time, it has been found that the texture of the non-skin facing surface of the outer layer sheet 5 is improved. The reason why such an effect is exhibited is that the non-sticking region R2 is set to 0.2 or less, and the ratio M1 / M2 is set to 0.75 or more and 1.25 or less, so that the landing region R1 is obtained. It is considered that this is to smoothly homogenize the feel of the entire outer surface of the diaper 1 while suppressing a decrease in the engaging force with the engaging portion 71. With such a diaper 1, the wearing state shown in FIG. 1 can be stably maintained.
In addition, diapers are generally distributed in a compressed state in a packaging bag. When the diaper is taken out from the packaging bag, the diaper is pulled out of the packaging bag while the adjacent diapers rub against each other. Since the outer surface of the diaper 1 of the present embodiment is smooth, it can be easily taken out from the inside of the packaging bag.

FIG. 5 shows an embodiment of the package P in which a plurality of diapers 1 of the present embodiment are housed in the packaging bag 30. In this package P, the diaper 1 is folded in half at the substantially center of the inseam C so as to divide the total length of the vertical direction X into two equal parts, and a plurality of the folded diapers 1 are arranged side by side and in the thickness direction. It is housed in the packaging bag 30 in a compressed state. Under such a state, the adjacent diapers 1 are in contact with each other on the non-skin facing surface of the ventral side A and the non-skin facing surface of the dorsal side B. That is, a plurality of diapers 1 are housed in the packaging bag in a state where the fastening regions R1 do not come into contact with each other. With such a configuration, it is possible to suppress the catching of the fastening regions R1 with each other, so that the diaper 1 can be more easily taken out from the packaging bag 30.
In the package P shown in FIG. 5, the take-out direction X1 when the diaper 1 is taken out from the packaging bag 30 and the vertical direction X of the diaper 1 substantially coincide with each other. That is, the diaper 1 is taken out from the packaging bag 30 substantially along the vertical direction X.

[Measurement method of average friction coefficient]
First, the measurement target such as the outer layer sheet 5 is taken out from the diaper. Next, using a KES-FB4 surface tester (manufactured by Kato Tech Co., Ltd.), the contactor is placed under a load of 5 kPa (50 gf / cm ² ) with a contactor on a measurement target such as an outer layer sheet 5. Is moved 3 cm horizontally at a constant speed of 0.1 cm / sec. The contacts are moved along the vertical direction X of the diaper. Then, the coefficient of friction (MIU) of the region where the contact is moved is measured. Such measurements are performed at any three points, and the average value is taken as the average friction coefficient of the sheet.

When a constituent member such as an outer layer sheet 5 is taken out from the diaper 1 and the physical properties of the constituent member are measured, if the constituent member is fixed to another constituent member by an adhesive, fusion, etc., the fixing portion thereof. After the other components are peeled off by blowing cold air from a cold spray, the adhesive adhering to the components to be measured is removed by dissolving with an organic solvent. This operation is common to all measurements herein.
When measuring physical properties such as the average friction coefficient of the anchoring region R1, at least the region where the engaging portion 71 is arranged is set as the region to be measured. That is, it is a region where the engaging portion 71 is arranged when the fastening tape 7 is arranged in the fastening region R1 so that the waist opening WH and the leg opening LH are formed.
Further, when measuring physical properties such as an average friction coefficient with respect to the anchorage outer region R2 of the outer layer sheet 5, at least the central region of the vertical direction X in the ventral side A or the dorsal side B is defined as the region to be measured. do.

From the viewpoint of further improving the texture of the outer surface of the diaper 1, the ratio M1 / M2 is preferably 0.75 or more, more preferably 0.80 or more, and preferably 1.25 or less, more preferably 1. It is 20 or less, preferably 0.75 or more and 1.25 or less, and more preferably 0.80 or more and 1.20 or less.
From the viewpoint of achieving both the texture of the outer surface of the diaper 1 and the ease of taking out the diaper 1 from the packaging bag, the average coefficient of friction M2 of the anchorage outer region R2 is preferably 0.10 or more, more preferably 0.11 or more. It is preferably 0.20 or less, more preferably 0.19 or less, preferably 0.10 or more and 0.20 or less, and more preferably 0.11 or more and 0.19 or less.

From the viewpoint of more reliably ensuring the engagement force between the fastening tape 7 and the fastening region R1, the interfiber distance in the fastening region R1 is preferably 50 μm or more, more preferably 70 μm or more, and preferably 250 μm or less. It is more preferably 200 μm or less, preferably 50 μm or more and 250 μm or less, and more preferably 70 μm or more and 200 μm or less. With such a configuration, it is possible to secure a sufficient space for the fastening tape 7 to engage with, and it is possible to more reliably secure the engaging force. The interfiber distance is measured by the method described later.
From the viewpoint of more reliably achieving the above effects, it is preferable that the engaging portion 71 of the fastening tape 7 is provided with a large number of engaging protrusions on the surface.

<Measurement method of interfiber distance>
The interfiber distance (average interfiber distance) of a fiber aggregate such as a non-woven fabric or paper is obtained by the following formula (1) based on the assumption of Wrotnowski. The following formula (1) is generally used when determining the interfiber distance of a fiber aggregate. Under the Wrotnowski assumption, the fibers are columnar and the fibers are regularly arranged without intersecting.
The interfiber distance in the anchorage region R1 to be measured is calculated by the following formula (1). The thickness t, the basis weight W, the resin density ρ of the fiber, and the fiber diameter D used in the following formula (1) are average values of the measured values at any plurality of measurement points in the loose stool holding portion.
The thickness t (mm) is measured by the following method. First, a cut piece of 100 mm in the longitudinal direction × 100 mm in the width direction (direction orthogonal to the longitudinal direction) is cut out from the anchoring region R1 of the outer layer sheet. If it is not possible to make a piece of this size, make a piece as large as possible. Next, this cut piece is placed on a flat plate, a glass plate on the flat plate is placed on the flat plate, and the weight is evenly placed on the glass plate so that the load including the glass plate becomes 0.05 kPa. The thickness of the cut piece is measured. The measurement environment is a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 5%. A microscope (manufactured by KEYENCE CORPORATION, VHX-1000) is used as the measuring device. Using the measuring device, an enlarged photograph of the cut surface of the cut piece is obtained. When taking this magnified photograph, the ones of known dimensions are imprinted at the same time. Next, the scale is adjusted to the enlarged photograph of the cut surface of the cut piece, and the thickness of the cut piece is measured. The above operation is performed three times, and the average value of the three times is defined as the thickness t of the anchorage region R1.

For the basis weight W (g / m ² ), the anchorage region R1 is cut to a predetermined size (for example, 100 mm × 100 mm), and after mass measurement, the mass measurement value is obtained by the area obtained from the predetermined size. It is obtained by dividing (“Basis weight W (g / m ² ) = mass ÷ area obtained from a predetermined size”). This measurement is repeated 4 times, and the average value is taken as the basis weight.
The resin density ρ (g / cm ³ ) of the fiber is measured using a density gradient tube according to the measurement method of the density gradient tube method described in JIS L1015 Chemical Fiber Staple Test Method (URL is http: // kikakurui. com / l / L1015-2010-01.html, JIS Handbook Textile-2000 for books, P.764-765 of (Japanese Standards Association)).
The method for measuring the fiber diameter D follows the <method for measuring the fiber diameter> described later.

<Measuring method of fiber diameter>
The anchoring region R1 is cut with a razor (for example, a single-edged blade manufactured by Feather Safety Shaving Blade Co., Ltd.) to obtain a measuring piece having a rectangular shape in a plan view (8 mm × 4 mm). When cutting the measurement target, care should be taken not to destroy the structure of the cut surface of the measuring piece formed by the cutting due to the pressure at the time of cutting or the like. A preferred method for cutting the measurement target includes a method in which the measurement target is placed in liquid nitrogen to be sufficiently frozen prior to cutting the measurement target, and then cut. Using double-sided paper tape (Nichiban Co., Ltd. Nystack NW-15), attach the measurement piece to the sample table. The measurement piece is then platinum coated. For coating, an ion sputtering device E-1030 (trade name) manufactured by Hitachinaka Seiki Co., Ltd. is used, and the sputtering time is 30 seconds. The cut surface of the measurement piece is observed at a magnification of 1000 times using an S-4000 type field emission scanning electron microscope manufactured by Hitachi, Ltd. Next, with respect to the constituent fibers on the non-skin facing surface of the measurement piece, 10 lengths in the width direction with respect to the longitudinal direction of the fibers are measured, and the average value thereof is taken as the fiber diameter.

From the viewpoint of maintaining the wearing state of the diaper 1 more stably, the engagement strength between the fastening tape 7 and the fastening region R1 is preferably 2.0 N or more, more preferably 2.5 N or more, and more preferably. It is 6.0 N or less, more preferably 5.5 N or less, preferably 2.0 N or more and 6.0 N or less, and more preferably 2.5 N or more and 5.5 N or less. The engagement strength can be measured by the method for measuring the engagement strength in [engagement force between the fastening tape and the fastening region] of the embodiment described later.

The area of the fastening region R1 is relative to the area of the outer layer sheet 5 from the viewpoint of further suppressing catching on the outer surface (non-skin facing surface) of the diaper 1 and facilitating the removal of the diaper 1 from the packaging bag. It is preferably 3% or more, more preferably 5% or more, preferably 30% or less, more preferably 25% or less, and preferably 3% or more and 30% or less, more preferably 5% or more and 25% or less. Is.

From the viewpoint of keeping the average friction coefficient of the anchorage region R1 and the anchorage outer region R2 in the outer layer sheet 5 within the above-mentioned range, the outer layer sheet 5 includes any one of the following configurations (1) to (10). It is preferable that two or more of these configurations (1) to (10) are provided.
Configuration (1): The fineness of the constituent fibers is 0.05 dtex or more and 2.0 dtex or less.
Configuration (2): Unevenness is formed on the non-skin facing surface.
Configuration (3): A plurality of openings are formed.
Configuration (4): Constituent fibers are oriented in the vertical direction X on the non-skin facing surface.
Configuration (5): The non-skin facing surface is embossed.
Configuration (6): A void blocking treatment is applied to the non-skin facing surface.
Configuration (7): The outer layer sheet 5 contains a softening agent.
Configuration (8): Hollow fibers are included as constituent fibers.
Configuration (9): Flat fibers are present on the non-skin facing surface.
Configuration (10): Non-fusing fibers are contained in the non-skin facing surface.

Regarding the configuration (1), if a constituent fiber having a low fineness is used, the surface of the outer layer sheet 5 becomes finer and the surface can be made smoother. From such a viewpoint, the fineness of the constituent fibers of the outer layer sheet 5 is preferably 0.05 dtex or more, preferably 2.0 dtex or less, more preferably 1.5 dtex or less, and preferably 0.05 dtex or more and 2.0 dtex or more. Hereinafter, it is more preferably 0.05 dtex or more and 1.5 dtex or less.

[Measuring method of fiber fineness]
A sheet to be measured is cut into a rectangular shape of 50 mm × 100 mm (area 5000 mm ² ) to prepare a measurement sample. Next, the measurement sample is viewed in cross section, and the fiber thickness is measured by measuring the fiber thickness of 10 standard fibers at positions spaced 0.05 mm in the thickness direction from the non-skin facing surface of the measurement sample. Is actually measured using, and the average fiber thickness Dn (μm) is calculated. Next, a standard fiber constituent resin at a position 0.2 mm apart from the skin facing surface in the thickness direction was identified, and the theoretical fiber presence density Pn (g) was specified using a differential scanning calorimetry device (DSC). / Cm ³ ) is calculated. From the obtained average fiber thickness Dn (μm) and theoretical fiber abundance density Pn (g / cm ³ ), the weight (g) per 10,000 m of fiber length was calculated, and this calculated value was calculated. It is defined as the fineness (dtex) of the constituent fibers of the skin-side fiber layer.

Regarding the configuration (2), the unevenness formed on the non-skin facing surface of the outer layer sheet 5 is formed in a predetermined pattern in a plan view. As the predetermined pattern, a known pattern used for a surface sheet or the like of an absorbent article can be appropriately adopted. From the viewpoint of reducing the contact area of the outer layer sheet 5 and facilitating control of the average friction coefficient by forming irregularities on the surface, the irregularities are formed in a direction having an angle with respect to the lateral direction Y. It is preferable, and it is more preferable that it is formed in the direction along the vertical direction X. The unevenness of the sheet surface can be formed by a known method.

With respect to the configuration (3), if a plurality of openings are formed in the outer layer sheet 5, it is easy to control the average friction coefficient. From such a viewpoint, it is preferable that the plurality of openings are formed in a scattered pattern on the outer layer sheet 5 in a plan view.
From the same viewpoint as above, the area ratio of holes per unit area in the outer layer sheet 5 is preferably 5% or more, more preferably 10% or more, and preferably 25% or less, more preferably 20% or less. It is preferably 5% or more and 25% or less, and more preferably 10% or more and 20% or less.
From the same viewpoint as above, the size of the hole, that is, the area of the hole is preferably 0.3 mm ² or more, more preferably 0.5 mm ² or more, and preferably 10 mm ² or less, more preferably 7 mm. It is ² or less, preferably 0.3 mm ² or more and 10 mm ² or less, and more preferably 0.5 mm ² or more and 7 mm ² or less.
The area ratio of the holes and the area of the holes per unit area are obtained by the methods described later.
For the opening process, for example, a cutting device provided with a cutter roll and an anvil roll having a cutting blade having a shape corresponding to the contour of the opening on the outer peripheral surface of the cutter roll can be used. ..

[Measuring method of opening area ratio and opening area per unit area]
A measuring piece having a vertical direction of X30 mm and a horizontal direction of Y30 mm is cut out at any three points of the outer layer sheet 5. Next, the total area of the holes in the measurement piece is measured, and the ratio of the total area of the holes to the unit area (100 mm ² of 10 mm square) is calculated from the total area and the area of the measurement piece. Such measurements are performed at any three points on the outer layer sheet 5, and the average value thereof is taken as the area ratio of the openings per unit area.
As for the area of the holes, 10 arbitrary holes are selected from the measuring pieces cut out by the same measuring method as the area ratio of the holes per unit area, and these areas are measured. Such measurements are performed at any three points on the outer layer sheet 5, and the average value thereof is taken as the area of the holes.

Regarding the configuration (4), when the fibers are oriented in the vertical direction X, the feel when the sheet is touched along the vertical direction X can be smoothed. Whether or not the constituent fibers are oriented in the vertical direction X can be determined by whether or not the angle between the constituent fibers and the vertical direction X is within ± 30 degrees. Specifically, the non-skin facing surface of the outer layer sheet 5 is magnified and observed with an electron microscope, and 70% or more of all the constituent fibers in the observation field of view form an angle within ± 30 degrees with the vertical X. If so, it can be determined that the constituent fibers of the outer layer sheet 5 are oriented in the vertical direction X.

When the sheet is embossed with respect to the configuration (5), the contact area of the sheet is reduced and the average friction coefficient can be controlled more easily. Examples of the embossing include compression-only embossing without heating, heat embossing, ultrasonic embossing, high-frequency embossing, and the like.
From the viewpoint of making the feel of the sheet smoother, it is preferable that the embossed portions formed by the embossing process are formed in a scattered pattern on the outer layer sheet 5.
From the same viewpoint as above, the area ratio of the embossed portion per unit area on the non-skin facing surface of the outer layer sheet 5 is preferably 5% or more, more preferably 10% or more, and preferably 25% or less. It is preferably 20% or less, preferably 5% or more and 25% or less, and more preferably 10% or more and 20% or less.
From the same viewpoint as above, the area of the embossed portion on the non-skin facing surface of the outer layer sheet 5 is preferably 0.3 mm ² or less, more preferably 0.5 mm ² or less, and preferably 10 mm ² or more, more preferably. Is 7 mm ² or more, preferably 0.3 mm ² or more and 10 mm ² or less, and more preferably 0.5 mm ² or more and 7 mm ² or less. The area of the embossed portion is the area of the embossed portion per piece.
The area ratio of the embossed portion and the area of the embossed portion per unit area are measured by replacing "opening" with "embossed portion" in the above [method for measuring the area ratio of the opened hole and the area of the opened hole]. It shall be.

Regarding the configuration (6), the void closing treatment is a treatment for closing the voids between the constituent fibers of the sheet, whereby the sheet surface can be made smoother. Examples of the void closing treatment include heat treatment, ultrasonic treatment, and coating treatment. As the liquid used for the coating treatment, a liquid in which the volatile components in the liquid volatilize after coating and only the solid content remains on the sheet can be used. Examples of the liquid include natural extracts contained in skin care agents, oil agents, inks used for printing, and the like. The oil agent preferably has a high viscosity.

Regarding the configuration (7), the softener can further improve the feel of the sheet. The content of the softening agent in the outer layer sheet 5 is preferably 0.03% by mass or more, more preferably 0.1% by mass or more, and preferably 10% by mass or less, more preferably 6% by mass or less. Further, it is preferably 0.03% by mass or more and 10% by mass or less, and more preferably 0.1% by mass or more and 6% by mass or less. The content of the softener in the sheet is measured by the following method. First, a portion where the sheets are not bonded to each other by hot melt adhesive or heat fusion is cut out from the sheet to be measured, and this is used as a test piece. The mass of this test piece when dried by electrodrying at 60 ° C. for 1 hour is measured, and this is used as the initial mass. Then, the test piece is soaked in acetone for 2 hours, naturally dried for 1 week, and dried by electrodrying at 60 ° C. for 1 hour, and the mass thereof is defined as the mass without a softener. Then, the value obtained by subtracting the softener-free mass from the initial mass is divided by the softener-free mass, and the value expressed as a percentage (%) is taken as the softener content.

With respect to the configuration (8), by including the hollow fiber, the sheet can be softened and the touch can be improved. From such a viewpoint, the basis weight of the hollow fiber in the outer layer sheet 5 is preferably 5 g / m ² or more, more preferably 8 g / m ² or more, and preferably 15 g / m ² or less, more preferably 20 g / m. It is ² or less, preferably 5 g / m ² or more and 20 g / m ² or less, and more preferably 8 g / m ² or more and 15 g / m ² or less.

With respect to the configuration (9), if flat fibers are included, the surface of the sheet can be made smoother. The flat fiber is a fiber having a flatness (major axis length / minor axis length) of 1.2 or more in the cross section of the fiber. For example, when the cross section of the fiber has a perfect circular shape, the flatness is 1, and as the degree of crushing of the cross section increases (closer to an elliptical shape), the flatness becomes larger than 1.
From the viewpoint of making the outer layer sheet 5 smoother to the touch, the abundance of flat fibers on the non-skin facing surface of the outer layer sheet 5 is preferably 60% or more, more preferably 70% or more. The upper limit of the abundance rate of the flat fibers is not particularly limited and may be 100%. The abundance of such flat fibers is measured by the following measuring method.

[Measuring method of abundance of flat fibers]
The outer layer sheet 5 is taken out from the diaper 1, and the measurement piece is cut out from an arbitrary area. The measuring piece has a quadrangular shape (8 mm × 4 mm) in a plan view, and is obtained by cutting the outer layer sheet 5 with a razor (for example, a single blade manufactured by Feather Safety Shaving Blade Co., Ltd.). When cutting the outer layer sheet 5, care should be taken so that the structure of the cut surface of the measuring piece formed by the cutting is not destroyed by the pressure at the time of cutting or the like. As a preferable cutting method, there is a method of putting the outer layer sheet 5 in liquid nitrogen to sufficiently freeze the outer layer sheet 5 prior to cutting the outer layer sheet 5, and then cutting the outer layer sheet 5. Using double-sided paper tape (Nichiban Co., Ltd. Nystack NW-15), attach the measurement piece to the sample table. The measurement piece is then platinum coated. For coating, an ion sputtering device E-1030 (trade name) manufactured by Hitachinaka Seiki Co., Ltd. is used, and the sputtering time is 30 seconds. Next, the cut surface of the measurement piece is observed at a magnification of 1000 times using an S-4000 type field emission scanning electron microscope manufactured by Hitachi, Ltd. In this cut surface, observe the cross section of the fiber existing on the second surface 62 of the measurement piece, measure the major axis length and the minor axis length of the cross section of the fiber, and divide the major axis length by the minor axis length. Calculate the flatness of the fiber with. This is measured for 10 fibers, and the ratio of the number of fibers having a flatness (major axis length / minor axis length) of 1.2 or more to the 10 fibers is determined, and this is the abundance rate (%) of flat fibers. And.

As a method for obtaining flat fibers, that is, fibers having a large degree of cross-sectional collapse, 1) a method of spinning using a spinneret having a flatness corresponding to a desired flatness, and 2) a normal spinneret (with a cross section of a spinneret). A known method such as a method of performing post-processing such as pressurization on a fiber deposit obtained by using a perfect circular shape or a shape similar thereto can be mentioned. The method 2) is preferable from the viewpoint of reliably orienting the long axis direction of the flat fibers in the plane direction of the nonwoven fabric to further improve the smoothness of the outer layer sheet 5. The method 2) can be carried out, for example, by pressurizing and consolidating a fiber aggregate (nonwoven fabric) containing fibers having a perfect circular cross section while heating as necessary. Such a method can be carried out, for example, by calendar processing.

Regarding the configuration (10), if the non-skin facing surface contains non-fused fibers that are not fused by heat or the like, an unfused portion is formed when the constituent fibers are made into a non-woven fabric. In this unfused portion, the fiber morphology of the constituent fibers is maintained, so that the constituent fibers can easily move with respect to an external force, and friction can be reduced. From such a viewpoint, the content of the non-fused fiber in the outer layer sheet 5 is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and more preferably 0.5% by mass or more, based on the total mass of the outer layer sheet 5. It is preferably 20.0% by mass or less, more preferably 10.0% by mass or less, and preferably 0.1% by mass or more and 20.0% by mass or less, more preferably 0.5% by mass or more and 10.0% by mass. % Or less.
Examples of the non-fused fiber include natural fibers such as pulp and cotton, cellulosic fibers such as rayon, lyocell and tencel, and one of these fibers may be used alone or in combination of two or more. Can be done.

From the viewpoint of further improving the smoothness or softness of the sheet, when the outer layer sheet 5 is an air-through nonwoven fabric, it is particularly preferable that the outer layer sheet 5 has any one or more of the above configurations (8) to (10). It is more preferable to have two or more of the configurations (8) to (10).

From the viewpoint of giving a sense of unity to the texture of the entire diaper 1, the diaper 1 has an approximate coefficient of friction between the constituent members forming the skin facing surface and the constituent members forming the non-skin facing surface. Is preferable. That is, among the constituent members forming the skin facing surface of the diaper 1, the portion and the seat member that can come into contact with the wearer's skin in the wearing state preferably have an average friction coefficient within the following range. Examples of the "portion and sheet member that may come into contact with the wearer's skin" include a cuff forming sheet 16b, a sheet forming the skin facing surface of the waist flap portion WF, a surface sheet 2, and the like.
When the average friction coefficient of the cuff forming sheet 16b is M3 and the average friction coefficient in the non-adhesive region R2 is M2, the ratio of M3 to M2 (M3 / M2) is preferably 0.75 or more, more preferably 0.75 or more. It is 0.8 or more, preferably 1.25 or less, more preferably 1.2 or less, preferably 0.75 or more and 1.25 or less, and more preferably 0.8 or more and 1.2 or less. ..
The average coefficient of friction M3 of the cuff forming sheet 16b is preferably 0.10 or more, more preferably 0.11 or more, preferably 0.25 or less, more preferably 0.24 or less, and preferably 0.24 or less. It is 0.10 or more and 0.25 or less, more preferably 0.11 or more and 0.24 or less.

When the average friction coefficient of the waist flap portion WF on the skin facing surface is M4 and the average friction coefficient in the non-adhesive region R2 is M2, the ratio of M4 to M2 (M4 / M2) is preferably 0.75 or more. It is more preferably 0.8 or more, preferably 1.25 or less, more preferably 1.2 or less, and preferably 0.75 or more and 1.25 or less, more preferably 0.8 or more and 1.2. It is as follows.
The average coefficient of friction M4 on the skin-facing surface of the waist flap portion WF is preferably 0.10 or more, more preferably 0.11 or more, and preferably 0.25 or less, more preferably 0.24 or less. Further, it is preferably 0.10 or more and 0.25 or less, and more preferably 0.11 or more and 0.24 or less.
The average friction coefficient of the waist flap portion WF on the skin facing surface is synonymous with the average friction coefficient of the sheet member forming the skin facing surface of the waist flap portion WF.
In the present embodiment, the skin facing surface of the waist flap portion WF is formed by the cuff forming sheet 16b, so that the average friction coefficient M4 on the skin facing surface of the waist flap portion WF is the skin of the cuff forming sheet 16b. The average coefficient of friction on the facing surfaces. Instead of this, the skin-facing surface of the waist flap portion WF may be formed of a sheet member separate from the cuff forming sheet 16b.

When the average friction coefficient of the surface sheet 2 is M5 and the average friction coefficient in the non-adhesive region R2 is M2, the ratio of M5 to M2 (M5 / M2) is preferably 0.75 or more, more preferably 0. It is 8 or more, preferably 1.25 or less, more preferably 1.2 or less, preferably 0.75 or more and 1.25 or less, and more preferably 0.8 or more and 1.2 or less.
The average coefficient of friction M5 of the surface sheet 2 is preferably 0.10 or more, more preferably 0.11 or more, preferably 0.25 or less, more preferably 0.24 or less, and preferably 0. It is 10 or more and 0.25 or less, more preferably 0.11 or more and 0.24 or less.

From the viewpoint of keeping the average friction coefficient within the above range, the cuff forming sheet 16b, the sheet member forming the skin facing surface of the waist flap portion WF, and the surface sheet 2 each have the above-mentioned configurations (1) to. It is preferable to include any one or more of (10), and it is preferable to include any two or more of the configurations (1) to (10). In this case, the "outer layer sheet 5" in the configurations (1) to (10) is the "cuff forming sheet 16b", the "sheet member forming the skin facing surface of the waist flap portion WF", or the "surface sheet 2". It shall be read as.

As described above, the fastening region R1 of the present embodiment is composed of the fastening member 6, and the fastening member 6 is joined to the non-skin facing surface of the outer layer sheet 5 (see FIG. 6).
When the fastening region R1 is composed of the fastening member 6, the thicknesses of the fastening member 6 and the outer layer sheet 5 shall be within the following ranges from the viewpoint of facilitating the removal of the diaper 1 from the packaging bag 30. Is preferable.
The thickness of the fastening member 6 is preferably 10% or more, more preferably 20% or more, preferably 80% or less, more preferably 70% or less, and more preferably 70% or less with respect to the thickness of the outer layer sheet 5. It is 10% or more and 80% or less, more preferably 20% or more and 70% or less.
The thickness of the fastening member 6 is preferably 0.05 mm or more, more preferably 0.1 mm or more, preferably 0.5 mm or less, more preferably 0.4 mm or less, and preferably 0.05 mm or more. It is 0.5 mm or less, more preferably 0.1 mm or more and 0.4 mm or less.
The thickness of the outer layer sheet 5 is preferably 0.05 mm or more, more preferably 0.1 mm or more, preferably 0.7 mm or less, more preferably 0.6 mm or less, and preferably 0.05 mm or more and 0. It is 0.7 mm or less, more preferably 0.1 mm or more and 0.6 mm or less.
The thicknesses of the outer layer sheet 5 and the fastening member 6 are measured using a non-contact laser displacement meter (for example, KEYENCE laser head LK-2100, displacement meter RV 3-55 R). The pressure at the time of thickness measurement is 1.7 kPa. The measurement is performed 5 times, and the average value is taken as the thickness of each of the outer layer sheet 5 and the fastening member 6.

The fastening member 6 of the present embodiment has a low-thickness region in which the thickness is less than 50% of the maximum thickness of the fastening member 6 (not shown). The low-thickness region can be formed by subjecting the fastening member 6 to a pressure treatment such as an embossing treatment.
From the viewpoint of facilitating the removal of the diaper 1 from the packaging bag, the area of the low-thickness region is preferably 30% or more, more preferably 35% or more, and preferably 35% or more with respect to the area of the fastening member 6. It is 90% or less, more preferably 85% or less, preferably 30% or more and 90% or less, and more preferably 35% or more and 85% or less.

The area of the low-thickness region with respect to the area of the fastening member 6 is measured by the following method.
First, a measuring piece having a size of 60 mm in the vertical direction and 30 mm in the horizontal direction is cut out from the fastening member 6. The measuring piece is placed on a horizontal table under no pressure so that the non-skin facing surface faces up. A transparent acrylic plate is placed on the measuring piece, and a weight is placed on the acrylic plate so that the measuring piece is pressurized at 1.7 kPa. Next, the surface shape of the surface to be measured in the pressurized measuring piece is measured using a high-precision shape measuring system KS-1100 manufactured by Keyence. Specifically, the thickness of each position on the measuring piece is measured. The measurement conditions are a measurement pitch of 50 μm and a moving speed of 10 cm / s, and a range of 30 mm in the vertical direction × 30 mm in the horizontal direction is measured. The measurement result (image) thus obtained is analyzed using a shape analysis application KS-Analyzer manufactured by Keyence Corporation. Then, the position where the maximum thickness is obtained in the measurement piece and the position where the thickness with respect to the maximum thickness is 50% or more are extracted, and this is referred to as a "high thickness region". Further, the position where the thickness of the measurement piece is less than 50% of the maximum thickness is defined as a "low thickness region". The area of the low-thickness region is measured by binarizing the high-thickness region and the low-thickness region. Specifically, the image is taken into Image-Pro Plus manufactured by Nippon Roper Co., Ltd., and the black-and-white contrast is set to 100 by enhancing the contrast. After removing noise by a filter process (median, 5 × 5 5 times), a count process is performed to measure the total area of the low-thickness region displayed in white or black. Then, the total area of the low-thickness region is divided by the area of the measurement piece (30 mm in the vertical direction × 30 mm in the horizontal direction) to obtain the area of the low-thickness region with respect to the area of the fastening member 6.

The fastening member 6 of the present embodiment has a shape long in the lateral direction Y in a plan view. The fastening member 6 is joined to the non-skin facing surface of the outer layer sheet 5 at both ends in the vertical direction X. Specifically, as shown in FIG. 6, the fastening member 6 has joining

regions

61 and 61 in which the fastening member 6 and the outer layer sheet 5 are joined at both ends in the vertical direction X. There is.
From the viewpoint of facilitating the removal of the diaper 1 from the packaging bag 30, the length L6 (see FIG. 6) of the joint region 61 in the lateral direction Y is preferably the overall length of the fastening member 6 in the lateral direction Y. It is 80% or more, more preferably 85% or more. The upper limit of the ratio of the length L6 of the joint region 61 to the total length of the lateral Y of the fastening member 6 in the lateral direction is not particularly limited, but is 100% from the same viewpoint as above, that is, the fastening member. In 6, it is preferable that the end portion in the vertical direction X is continuously joined to the outer layer sheet 5 over the entire length in the lateral direction Y of the fastening member 6.

In the present embodiment, the outer layer sheet 5 and the fastening member 6 are joined via an adhesive. As the adhesive, a known adhesive such as a hot melt adhesive can be used.
Amount of adhesive used to bond the outer layer sheet 5 and the fastening member 6 from the viewpoint of further improving the texture of the diaper 1 on the non-skin facing surface while ensuring the bonding strength between the outer layer sheet 5 and the fastening member 6. Is 10 g / m ² or more, more preferably 15 g / m ² or more, preferably 30 g / m ² or less, more preferably 25 g / m ² or less, and preferably 10 g / m ² or more and 30 g / m. It is ² or less, more preferably 15 g / m ² and 25 g / m ² or less.

The material for forming each part of the diaper in the above-described embodiment will be described in detail. As the leak-proof sheet 3 and the absorber 4, those conventionally used for absorbent articles can be used without particular limitation.
As the leak-proof sheet 3, a liquid-impermeable resin film, a laminate of the resin film and a non-woven fabric, or the like can be used.
As the absorbent core 4, as the absorbent core 4a, an aggregate of hydrophilic fibers such as wood pulp and a hydrophilized synthetic fiber, or an aggregate in which a water-absorbing polymer is retained can be used. Further, as the core wrap sheet 4b, the same material as the material for forming the surface sheet 2 described later can be used.

Nonwoven fabrics produced by various manufacturing methods can be used for the sheet members forming the skin-facing surface of the diaper 1 such as the outer layer sheet 5, the surface sheet 2 and the cuff forming sheet 16b. Lace non-woven fabric, heat roll non-woven fabric, melt blown non-woven fabric, laminated non-woven fabric thereof and the like can be used. Examples of the laminated non-woven fabric include a laminated non-woven fabric (SM non-woven fabric and SMS non-woven fabric) including a spunbonded non-woven fabric layer (S).
The outer layer sheet 5 and the surface sheet 2 may be composed of one sheet, or may be composed of a laminated body of a plurality of sheets instead.
As the cuff forming sheet 16b, a water-repellent nonwoven fabric may be used.

As the elastic member 16a for forming the cuff and the elastic member 15 for forming the leg gather in the leak-proof cuff 16, various known elastic materials usually used for this kind of absorbent article can be used without particular limitation. Examples of the elastic material include synthetic rubber such as styrene-butadiene, butadiene, isoprene and neoprene, natural rubber, EVA, elastic polyolefin and polyurethane. As the form of the elastic member, a thread-like (thread rubber, etc.) or string-like (flat rubber, etc.) having a rectangular, square, circular, or polygonal cross section, or a multifilament type thread-like member is preferably used. can.

The tape base material 70 and the engaging portion 71 forming the fastening tape 7, and the forming materials of the fastening member 6 can be used without particular limitation as long as they are usually used for deployable disposable diapers. Further, the shape of the engaging protrusion in the engaging portion 71 is not particularly limited, and may be a hook shape, an anchor shape, a hook shape, or the like.
For example, the fastening tape 7 and the fastening member 6, or the fastening tape 7 and the outer layer sheet 5 have "Magic Tape (registered trademark)" (manufactured by Kuraray), "Quicklon (registered trademark)" (manufactured by YKK), and the like. Mechanical fasteners such as "Magic Cross (registered trademark)" (manufactured by Kanebo Bell Touch Co., Ltd.) can be used. When a non-woven fabric is used for the fastening member 6, it is preferably an air-through non-woven fabric from the viewpoint of facilitating engagement.
As the material for forming the tape base material 70, a synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate, etc., and a sheet or non-woven fabric made of a composite material of two or more kinds of these synthetic resins can be used.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment.
Further, the above-mentioned absorbent article was a so-called deployable disposable diaper having a fastening tape, but can be applied to, for example, a diaper cover (pad holder) or a band-shaped body that can be attached and detached around the waist, and is for infants. It may be for adults. The absorbent article of the present invention broadly includes articles used for absorbing body fluids (urine, loose stool, menstrual blood, sweat, etc.) discharged from the human body. For example, incontinence pads, menstrual napkins, menstrual shorts and the like are included.

The following absorbent articles are further disclosed with respect to the above-described embodiment of the present invention.
<1>
It has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and is arranged in the crotch part of the wearer, and the ventral side and the back extending in the front-back direction of the crotch part. It has a side portion, and has a fastening tape provided on both side edges of the dorsal portion along the longitudinal direction, and a fastening region provided on the ventral side portion to which the fastening tape can be fastened. , An absorbent article
The non-skin facing surface has the anchored region and the region other than the anchored region, and at least the region other than the anchored region is formed by the outer layer sheet.
The average friction coefficient in the region other than the anchorage region is 0.20 or less, and the average friction coefficient is 0.20 or less.
When the average friction coefficient in the anchorage region is M1 and the average friction coefficient in the region other than the anchorage region is M2, the ratio of M1 to M2 (M1 / M2) is 0.75 or more and 1.25 or less. , Absorbent article.

<2>
The absorbent article according to <1>, wherein the average friction coefficient M2 in a region other than the anchorage region is 0.10 or more and 0.20 or less, preferably 0.11 or more and 0.19 or less.
<3>
The absorbent article according to <1> or <2>, wherein the interfiber distance in the anchorage region is 50 μm or more and 250 μm or less, preferably 70 μm or more and 200 μm or less.
<4>
It has an absorbent body including a liquid-retaining absorber and a pair of leak-proof cuffs arranged along both sides of the absorbent body along the longitudinal direction.
The leak-proof cuff has a cuff-forming sheet and an elastic member extending in the vertical direction at a free end portion.
When the average friction coefficient of the cuff forming sheet is M3 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M3 to M2 (M3 / M2) is 0.75 or more and 1.25 or less. The absorbent article according to any one of <1> to <3>.
<5>
The absorbent article according to <4> or <5>, wherein the average friction coefficient M3 of the cuff forming sheet is 0.10 or more and 0.25 or less, preferably 0.11 or more and 0.24 or less.
<6>
The liquid-retaining absorber and the ventral and dorsal portions of the ventral and dorsal portions each extend outward from the peripheral edge of the absorber in the vertical direction or outward in the lateral direction. It has a waist flap part and
When the average friction coefficient on the skin-facing surface of the waist flap portion is M4 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M4 to M2 (M4 / M2) is 0.75 or more. The absorbent article according to any one of <1> to <5>, which is 25 or less.
<7>
The absorbent article according to <6>, wherein the average friction coefficient M4 on the skin-facing surface of the waist flap portion is 0.10 or more and 0.24 or less, preferably 0.11 or more and 0.25 or less.

<8>
It has a liquid-retaining absorber and a surface sheet arranged on the skin-facing surface side of the absorber and in contact with the wearer's skin in the wearing state.
When the average friction coefficient of the surface sheet is M5 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M5 to M2 (M5 / M2) is 0.75 or more and 1.25 or less. The absorbent article according to any one of <1> to <7>.
<9>
The absorbent article according to <8>, wherein the average friction coefficient M5 of the surface sheet is 0.10 or more and 0.25 or less, preferably 0.11 or more and 0.24 or less.
<10>
It has an absorbent body including a liquid-retaining absorber and a pair of leak-proof cuffs arranged along both sides of the absorbent body along the longitudinal direction.
The leak-proof cuff has a cuff-forming sheet and an elastic member extending in the vertical direction at a free end portion.
A waist flap portion extending outward in the vertical direction or outward in the lateral direction from the peripheral edge of the absorber, and the absorption portion on the end side in the vertical direction of each of the ventral side portion and the dorsal side portion. It has a surface sheet that is arranged on the side facing the skin of the body and that comes into contact with the wearer's skin when worn.
The outer layer sheet, the cuff forming sheet, the sheet member forming the skin facing surface of the waist flap portion, and any one or more of the surface sheets have the following configurations (1) to (10). The absorbent article according to any one of <1> to <9>, which comprises any one or more of the above.
Configuration (1): The fineness of the constituent fibers is 0.05 dtex or more and 2.0 dtex or less.
Configuration (2): Unevenness is formed on the non-skin facing surface.
Configuration (3): A plurality of openings are formed.
Configuration (4): The constituent fibers are oriented in the longitudinal direction on the non-skin facing surface.
Configuration (5): The non-skin facing surface is embossed.
Configuration (6): A void blocking treatment is applied to the non-skin facing surface.
Configuration (7): The sheet contains a softener.
Configuration (8): Hollow fibers are included as constituent fibers.
Configuration (9): Flat fibers are present on the non-skin facing surface.
Configuration (10): Non-fusing fibers are contained in the non-skin facing surface.
<11>
The absorbency according to <10>, wherein the unevenness in the configuration (2) is formed in a direction having an angle with respect to the horizontal direction, and is preferably formed in a direction along the vertical direction. Goods.
<12>
The absorbent article according to <10>, wherein the area ratio of the openings per unit area of the configuration (3) is 5% or more and 25% or less, preferably 10% or more and 20% or less.
<13>
Regarding the above configuration (4), when observing the non-skin facing surface using an electron microscope, 70% of the constituent fibers have an angle formed by the vertical direction within ± 30 degrees with respect to all the constituent fibers in the observation field of view. The absorbent article according to <10> above.
<14>
With respect to the embossed portion formed by the embossing treatment of the configuration (5), the area ratio of the embossed portion per unit area on the non-skin facing surface is 5% or more and 25% or less, preferably 10% or more and 20% or less. The absorbent article according to <10> above.
<15>
Regarding the embossed portion formed by the embossing treatment of the configuration (5), the area of the embossed portion on the non-skin facing surface is 0.3 mm ² or more and 10 mm ² or less, preferably 0.5 mm ² or more and 7 mm ² or less. The absorbent article according to <10> above.

<16>
The absorbent article according to <10>, wherein the void closing treatment is a heat treatment, an ultrasonic treatment, or a coating treatment with respect to the configuration (6).
<17>
The absorbent article according to <16>, wherein the liquid used for the coating treatment volatilizes the volatile components in the liquid after being coated and only the solid content remains on the sheet. ..
<18>
The absorbent article according to <17>, wherein the liquid is a natural extract, an oil agent, or an ink used for printing.
<19>
Regarding the configuration (7), the content of the softener in the sheet is 0.03% by mass or more and 10% by mass or less, preferably 0.1% by mass or more and 6% by mass or less, according to the above <10>. Absorbent article.
<20>
Regarding the configuration (8), the basis weight of the hollow fiber in the sheet is 5 g / m ² or more and 20 g / m ² or less, preferably 8 g / m ² or more and 15 g / m ² or less, according to the above <10>. Absorbent article.
<21>
The absorbent article according to <10>, wherein the abundance of the flat fibers on the non-skin facing surface with respect to the configuration (9) is 60% or more, preferably 70% or more, and 100% or less.
<22>
Regarding the configuration (10), the content of the non-fused fiber is 0.1% by mass or more and 20.0% by mass or less, preferably 0.5% by mass or more and 10.0 with respect to the total mass of the sheet. The absorbent article according to <10>, which is not more than% by mass.
<23>
The non-fused fiber contains either one or both of natural fiber and cellulosic fiber, and contains both.
The natural fiber is one or two kinds of pulp and cotton, and is
The absorbent article according to <10>, wherein the cellulosic fiber is one or more of rayon, lyocell and tencel.
<24>
The outer layer sheet, the cuff forming sheet, the sheet member forming the skin facing surface of the waist flap portion, and any one or more of the surface sheets are air-through nonwoven fabrics.
The absorbent article according to any one of <10> and <20> to <22>, comprising any one or more, preferably two or more, of the configurations (8) to (10).
<25>
The fastening region is composed of a fastening member to which the fastening tape is fastened.
The absorbent article according to any one of <1> to <24>, wherein the thickness of the fastening member is 80% or less with respect to the thickness of the outer layer sheet.

<26>
The fastening region is composed of a fastening member to which the fastening tape is fastened, and the fastening member has a low-thickness region having a thickness of less than 50% with respect to the maximum thickness of the fastening member. ,
The absorbent article according to any one of <1> to <25>, wherein the area of the low-thickness region is 30% or more with respect to the area of the fastening member.
<27>
The fastening region is composed of a fastening member to which the fastening tape is fastened, and the fastening member has a bonding region joined to the non-skin facing surface of the outer layer sheet at both ends in the vertical direction. And
The absorbent article according to any one of <1> to <26>, wherein the lateral length of the joint region is 80% or more with respect to the lateral total length of the fastening member.
<28>
The absorbent article according to any one of <1> to <27>, wherein the area of the anchorage region is 30% or less with respect to the area of the outer layer sheet.
<29>
The absorbent article according to <28>, wherein the area of the anchorage region is 3% or more and 30% or less, preferably 5% or more and 25% or less with respect to the area of the outer layer sheet.
<30>
A package in which a plurality of absorbent articles according to any one of <1> to <29> are housed in a packaging bag in a state where the fastening regions do not come into contact with each other.
<31>
The absorbent article is folded in half at the substantially center of the crotch so as to divide the total length in the vertical direction into two equal parts, and a plurality of the folded absorbent articles are arranged side by side and in the thickness direction. The absorbent articles are housed in the packaging bag in a compressed state, and the non-skin facing surface of the ventral side and the non-skin facing surface of the dorsal side are in contact with each other. , The package according to <30>.

Hereinafter, the present invention will be described in more detail by way of examples. However, the scope of the invention is not limited to such examples. Unless otherwise specified, "%" means "mass%".

[Example 1]
An air-through nonwoven fabric made of polyethylene terephthalate and a composite fiber of polyethylene and composed of constituent fibers having a fineness of 1.3 dtex was prepared, and one surface of the nonwoven fabric was subjected to calendar treatment to prepare an air-through nonwoven fabric having flat fibers. An adhesive (general-purpose rubber-based hot melt) is used to fix the fastening member 6 to the one surface of the nonwoven fabric, and the outer layer sheet 5 has a fastening region R1 and a fastening outer region R2. And said. The amount of the adhesive used was 20 g / m ² .
For the fastening member 6, an air-through non-woven fabric made of a composite fiber of polypropylene and polyethylene and a constituent fiber having a fineness of 6.1 dtex was used.
As the cuff forming sheet 16b, an SMS non-woven fabric made of polypropylene and having a spunbond surface layer made of constituent fibers having a fineness of 1.8 dtex was prepared. This non-woven fabric was embossed and softened with a softener.
As a sheet forming the skin-facing surface of the waist flap portion WF, an SMS non-woven fabric made of polypropylene and having a spunbond surface layer of 1.8 dtex fineness was prepared. One surface of this non-woven fabric was embossed and softened with a softener.
As the fastening tape 7, a tape having an engaging portion 71 made of polypropylene was prepared.
Using the above outer layer sheet 5, fastening member 6, cuff forming sheet 16b, and fastening tape 7, the diaper of the embodiment shown in FIG. 1 described above was produced. The sheet forming the skin facing surface of the waist flap portion WF is arranged so as to extend laterally Y outward from the base end portion of the upright portion of the cuff forming sheet 16b, and adjacent components are adjacent to each other using an adhesive. It was joined with. In addition to these sheet members described above, constituent members (absorbents, etc.) of the commercially available diaper "Mary's Tape Type S size" were used.

[Example 2]
The composite is made of polyethylene terephthalate and a composite fiber of polyethylene, and is made by mixing a constituent fiber having a fineness of 1.8 dtex and cotton which is a non-woven fiber (5% by mass with respect to the mass of the composite fiber). After integrating the fiber and the cotton, an air-through treatment was performed on the fiber to obtain an air-through nonwoven fabric. This air-through non-woven fabric was used as the outer layer sheet 5.
For the fastening member 6, an air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of constituent fibers having a fineness of 4.4 dtex was used.
For each of the cuff forming sheet 16b and the sheet forming the skin facing surface of the waist flap portion WF, an SMS non-woven fabric made of polypropylene and a constituent fiber having a spunbond surface layer of 1.4 dtex was used.
For the surface sheet 2, an air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of constituent fibers having a fineness of 3.1 dtex was used.
The diaper 1 was produced by the same method as in Example 1 except that the above-mentioned constituent members were used. The outer layer sheet 5 of the diaper 1 obtained in Example 2 contained cotton on the non-skin facing surface.

[Comparative Example 1]
An air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of constituent fibers having a fineness of 3.0 dtex was prepared, and this was used as an outer layer sheet 5.
For the fastening member 6, an SMS non-woven fabric made of polypropylene and a constituent fiber having a spunbond surface layer of 1.8 dtex was used.
For the sheet for forming the cuff 16b and the sheet forming the skin facing surface of the waist flap portion WF, an SMS non-woven fabric made of polypropylene and a constituent fiber having a spunbond surface layer of 1.8 dtex was used.
For the surface sheet 2, an air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of constituent fibers having a fineness of 4.5 dtex was used.
A diaper was produced by the same method as in Example 1 except that the above components were used.

[Comparative Example 2]
An air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of a constituent fiber having a fineness of 2.3 dtex was prepared, and this was used as an outer layer sheet 5.
For the fastening member 6, a spunbonded non-woven fabric made of polypropylene and a constituent fiber having a fineness of 3.2 dtex was used.
For the cuff forming sheet 16b, an SMS non-woven fabric made of polypropylene and having a spunbond surface layer made of constituent fibers having a fineness of 2.0 dtex was used.
For the sheet forming the skin-facing surface of the waist flap portion WF, a spunbonded non-woven fabric made of polypropylene and a constituent fiber having a fineness of 2.7 dtex was used.
For the surface sheet 2, an air-through non-woven fabric made of a composite fiber of polyethylene terephthalate and polyethylene and made of constituent fibers having a fineness of 4.4 dtex was used.
A diaper was produced by the same method as in Example 1 except that the above components were used.

For the diapers of each Example and Comparative Example, the average friction coefficient of each of the fastening region R1 and the fastening outer region R2 of the outer layer sheet, the cuff forming sheet 16b, the skin facing surface of the waist flap portion WF, and the surface sheet was measured. did. These measurements were performed according to the method described above. In addition, the ratio of each average friction coefficient was calculated. The measurement results are shown in Table 1. In Table 1, M1 is the average friction coefficient in the anchorage region R1, M2 is the average friction coefficient in the anchorage outer region R2, M3 is the average friction coefficient of the cuff forming sheet 16b, and M4 is the waist flap portion. It is the average coefficient of friction of the WF on the surface facing the skin, and M5 is the average coefficient of friction of the surface sheet.

[Engagement force between fastening tape and fastening area]
For the diapers of each Example and Comparative Example, the engaging force between the fastening tape 7 and the fastening region R1 was evaluated by the following method. The fastening tape 7 was placed on the fastening region R1 and the 1kg roller was reciprocated three times on the fastening region R1 to fasten the fastening tape 7 to the fastening region R1. Next, the edge of the fastening tape 7 was clipped and connected to a push-pull gauge (RX-20, manufactured by Aiko Engineering Co., Ltd.). Next, the push-pull gauge was pulled until the fastening tape 7 was detached from the fastening region R1, and the engagement strength between the fastening tape 7 and the fastening region R1 was measured. Then, the engaging force was evaluated according to the following criteria. When the engagement strength is 2.0 N or more, it can be determined that the engagement force between the fastening tape and the fastening member is sufficient. The evaluation results are shown in Table 1.
A: The engagement strength is 2.0 N or more.
B: The engagement strength is less than 2.0 N.

[Easy to remove diapers from the packaging bag]
The diapers of each Example and Comparative Example were evaluated for ease of removal from the packaging bag by the following method (see FIG. 7). First, two diapers folded in half at the substantially center of the inseam C were prepared so as to divide the total length of the vertical direction X into two equal parts. One diaper 1a was placed on a flat surface so that the dorsal side portion B faced downward, and the end portion of the one diaper 1a in the vertical direction X was fixed with a gum tape. The other diaper 1b was placed on top of this one diaper 1a so that the dorsal side B faces downward and the positions of the inseam C of the two

diapers

1a and 1b coincide with each other. Next, a 2 kg weight 20 was placed on the anchoring region R1 of the other diaper 1b. In this way, the other diaper 1b was brought into contact with another diaper 1a and compressed by applying a load of 2 kg in the thickness direction, and this was put into a pseudo-packaging state in which the diaper was housed in the packaging bag (a pseudo-packaging state). See FIG. 7). Next, the end of the inseam C of the other diaper 1b was clipped and connected to a push-pull gauge 21 (RX-20, manufactured by Aiko Engineering Co., Ltd.). Next, the push-pull gauge 21 was pulled in the horizontal direction, and the maximum tensile strength was measured. Then, the ease of taking out the diaper from the packaging bag was evaluated according to the following criteria. When the maximum tensile strength is less than 10 N, it can be determined that the diaper can be easily taken out because the resistance force when taking out the diaper from the packaging bag is low. The evaluation results are shown in Table 1.
A: The maximum tensile strength is less than 10N.
B: The maximum tensile strength is 10 N or more.

As shown in Table 1, the diapers of each example had a maximum tensile strength of less than 10 N in the pseudo-packaged state, and an engagement strength between the fastening tape and the fastening region was 2.0 N or more. From this result, it was shown that the diaper of each embodiment can be easily taken out from the packaging bag while the engaging force between the fastening tape and the fastening member is secured. In addition, the diapers of each example had a smooth feel on the non-skin facing surface of the outer layer sheet and had a unified feeling as a whole, and the texture was good. In particular, the diaper of Example 1 was good because the textures of both the non-skin facing surface and the skin facing surface had a unified feeling.
On the other hand, the diaper of Comparative Example 1 has a maximum tensile strength of 10 N or more in the pseudo-packaged state, and the diaper of Comparative Example 2 has a good texture without a sense of unity in the touch of the non-skin facing surface of the outer layer sheet. It wasn't.

According to the absorbent article of the present invention, the absorbent article has an excellent texture while ensuring the engaging force of the fastening tape, and the absorbent article can be easily taken out from the packaging bag.

Claims

It has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and is arranged in the crotch part of the wearer, and the ventral side and the back extending in the front-back direction of the crotch part. It has a side portion, and has a fastening tape provided on both side edges of the dorsal portion along the longitudinal direction, and a fastening region provided on the ventral side portion to which the fastening tape can be fastened. , An absorbent article
The non-skin facing surface has the anchored region and the region other than the anchored region, and at least the region other than the anchored region is formed by the outer layer sheet.
The average friction coefficient in the region other than the anchorage region is 0.20 or less, and the average friction coefficient is 0.20 or less.
When the average friction coefficient in the anchorage region is M1 and the average friction coefficient in the region other than the anchorage region is M2, the ratio of M1 to M2 (M1 / M2) is 0.75 or more and 1.25 or less. , Absorbent article.
The absorbent article according to claim 1, wherein the average friction coefficient M2 in a region other than the anchorage region is 0.10 or more and 0.20 or less.
The absorbent article according to claim 1 or 2, wherein the interfiber distance in the anchorage region is 50 μm or more and 250 μm or less.
It has an absorbent body including a liquid-retaining absorber and a pair of leak-proof cuffs arranged along both sides of the absorbent body along the longitudinal direction.
The leak-proof cuff has a cuff-forming sheet and an elastic member extending in the vertical direction at a free end portion.
When the average friction coefficient of the cuff forming sheet is M3 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M3 to M2 (M3 / M2) is 0.75 or more and 1.25 or less. The absorbent article according to any one of claims 1 to 3.
The absorbent article according to claim 4, wherein the average friction coefficient M3 of the cuff forming sheet is 0.10 or more and 0.25 or less.
The liquid-retaining absorber and the ventral and dorsal portions of the ventral and dorsal portions each extend outward from the peripheral edge of the absorber in the vertical direction or outward in the lateral direction. It has a waist flap part and
When the average friction coefficient on the skin-facing surface of the waist flap portion is M4 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M4 to M2 (M4 / M2) is 0.75 or more. The absorbent article according to any one of claims 1 to 5, which is 25 or less.
The absorbent article according to claim 6, wherein the average friction coefficient M4 on the skin-facing surface of the waist flap portion is 0.10 or more and 0.24 or less.
It has a liquid-retaining absorber and a surface sheet arranged on the skin-facing surface side of the absorber and in contact with the wearer's skin in the wearing state.
When the average friction coefficient of the surface sheet is M5 and the average friction coefficient in a region other than the anchorage region is M2, the ratio of M5 to M2 (M5 / M2) is 0.75 or more and 1.25 or less. The absorbent article according to any one of claims 1 to 7.
The absorbent article according to claim 8, wherein the average friction coefficient M5 of the surface sheet is 0.10 or more and 0.25 or less.
It has an absorbent body including a liquid-retaining absorber and a pair of leak-proof cuffs arranged along both sides of the absorbent body along the longitudinal direction.
The leak-proof cuff has a cuff-forming sheet and an elastic member extending in the vertical direction at a free end portion.
A waist flap portion extending outward in the vertical direction or outward in the lateral direction from the peripheral edge of the absorber, and the absorption portion on the end side in the vertical direction of each of the ventral side portion and the dorsal side portion. It has a surface sheet that is arranged on the side facing the skin of the body and that comes into contact with the wearer's skin when worn.
The outer layer sheet, the cuff forming sheet, the sheet member forming the skin facing surface of the waist flap portion, and any one or more of the surface sheets have the following configurations (1) to (10). ), The absorbent article according to any one of claims 1 to 9.
Configuration (1): The fineness of the constituent fibers is 0.05 dtex or more and 2.0 dtex or less.
Configuration (2): Unevenness is formed on the non-skin facing surface.
Configuration (3): A plurality of openings are formed.
Configuration (4): The constituent fibers are oriented in the longitudinal direction on the non-skin facing surface.
Configuration (5): The non-skin facing surface is embossed.
Configuration (6): A void blocking treatment is applied to the non-skin facing surface.
Configuration (7): The sheet contains a softener.
Configuration (8): Hollow fibers are included as constituent fibers.
Configuration (9): Flat fibers are present on the non-skin facing surface.
Configuration (10): Non-fusing fibers are contained in the non-skin facing surface.
The absorbent article according to claim 10, wherein the unevenness in the configuration (2) is formed in a direction having an angle with respect to the lateral direction.
The absorbent article according to claim 10, wherein the area ratio of the opening per unit area of the configuration (3) is 5% or more and 25% or less.
Regarding the above configuration (4), when observing the non-skin facing surface using an electron microscope, 70% of the constituent fibers have an angle formed by the vertical direction within ± 30 degrees with respect to all the constituent fibers in the observation field of view. The absorbent article according to claim 10.
The tenth aspect of the present invention, wherein the area ratio of the embossed portion per unit area on the non-skin facing surface is 5% or more and 25% or less with respect to the embossed portion formed by the embossing treatment of the configuration (5). Absorbent article.
The absorbent article according to claim 10, wherein the area of the embossed portion on the non-skin facing surface is 0.3 mm 2 or more and 10 mm 2 or less with respect to the embossed portion formed by the embossing treatment of the configuration (5). ..
The absorbent article according to claim 10, wherein the void closing treatment is a heat treatment, an ultrasonic treatment, or a coating treatment with respect to the configuration (6).
The absorbent article according to claim 16, wherein the liquid used for the coating treatment is one in which the volatile components in the liquid volatilize after coating and only the solid content remains on the sheet.
The absorbent article according to claim 17, wherein the liquid is a natural extract, an oil agent, or an ink used for printing.
The absorbent article according to claim 10, wherein the content of the softener in the sheet is 0.03% by mass or more and 10% by mass or less with respect to the composition (7).
The absorbent article according to claim 10, wherein the hollow fiber in the sheet has a basis weight of 5 g / m 2 or more and 20 g / m 2 or less with respect to the configuration (8).
The absorbent article according to claim 10, wherein the abundance rate of the flat fibers on the non-skin facing surface is 60% or more and 100% or less with respect to the configuration (9).
The absorbent article according to claim 10, wherein the content of the non-fused fiber in the configuration (10) is 0.1% by mass or more and 20.0% by mass or less with respect to the total mass of the sheet. ..
The non-fused fiber contains either one or both of natural fiber and cellulosic fiber, and contains both.
The natural fiber is one or two kinds of pulp and cotton, and is
The absorbent article according to claim 10 or 22, wherein the cellulosic fiber is one or more of rayon, lyocell and tencel.
The outer layer sheet, the cuff forming sheet, the sheet member forming the skin facing surface of the waist flap portion, and any one or more of the surface sheets are air-through nonwoven fabrics.
The absorbent article according to any one of claims 10 and 20 to 22, comprising any one or more of the above configurations (8) to (10).
The fastening region is composed of a fastening member to which the fastening tape is fastened.
The absorbent article according to any one of claims 1 to 24, wherein the thickness of the fastening member is 80% or less with respect to the thickness of the outer layer sheet.
The fastening region is composed of a fastening member to which the fastening tape is fastened, and the fastening member has a low-thickness region having a thickness of less than 50% with respect to the maximum thickness of the fastening member. ,
The absorbent article according to any one of claims 1 to 25, wherein the area of the low-thickness region is 30% or more with respect to the area of the fastening member.
The fastening region is composed of a fastening member to which the fastening tape is fastened, and the fastening member has a bonding region joined to the non-skin facing surface of the outer layer sheet at both ends in the vertical direction. And
The absorbent article according to any one of claims 1 to 26, wherein the lateral length of the joint region is 80% or more with respect to the lateral total length of the fastening member.
The absorbent article according to any one of claims 1 to 27, wherein the area of the anchoring region is 30% or less with respect to the area of the outer layer sheet.
The absorbent article according to claim 28, wherein the area of the anchoring region is 3% or more and 30% or less with respect to the area of the outer layer sheet.
A package in which a plurality of absorbent articles according to any one of claims 1 to 29 are housed in a packaging bag in a state where the fastening regions do not come into contact with each other.
The absorbent article is folded in half at the substantially center of the crotch so as to divide the total length in the vertical direction into two equal parts, and a plurality of the folded absorbent articles are arranged side by side and in the thickness direction. The absorbent articles are housed in the packaging bag in a compressed state, and the non-skin facing surface of the ventral side and the non-skin facing surface of the dorsal side are in contact with each other. , The package according to claim 30.