RU220711U1 - ABSORBENT PRODUCT - Google Patents

Abstract

The absorbent article (1) includes a fastening tape (7) and a receiving zone (R1) configured to be fastened to the fastening tape (7). The non-skin facing surface has a receiving zone (R1) and a zone (R2) other than the receiving zone, and at least a zone (R2) different from the receiving zone is formed from the outer sheet (5). The average friction coefficient of the zone other than the receiving zone is 0.2 or less. When the average friction coefficient in the receiving zone (R1) is determined as M1 and the average friction coefficient in the zone other than the receiving zone is determined as M2, the ratio of M1 to M2 (M1/M2) is 0.75 or more and 1. 25 or less.

Description

Field of technology to which the utility model relates

[0001]

The utility model relates to an absorbent article and packaging.

Prior Art

[0002]

An absorbent article is known that includes a fastening tape and an attachment element to which the fastening tape can be attached. Such an absorbent article is put into a wearing state by being fastened around the waist of the wearer so that both ends defined in the longitudinal direction are placed around the waist of the wearer and the fastening tape and the fastening member are fastened.

For example, Patent Literature 1 discloses a paper diaper including a hook member attached to one end of the paper diaper and a sheet forming a top layer and being capable of being connected to the hook member, wherein the sheet forming the top layer is adhered to almost the entire surface of the paper diaper sheet material.

[0003]

In addition, Patent Literature 2 discloses a disposable diaper in which a strip-shaped sheet subjected to a predetermined printed pattern indicating the attachment location of the fastening tape is disposed between a back sheet covering the rear surface of the absorbent member and an outer sheet forming the outermost layer. complete diaper.

In addition, Patent Literature 3 discloses a liquid-absorbent article including an attachment tape that serves as a male Velcro member and an outer sheet that serves as a female member for attaching the attachment tape and is provided on the outer the surface of the area located below the waist.

List of links

Patent literature

[0004]

Patent Literature 1: Japanese Utility Model Application Released No. 01-168510

Patent Literature 2: Japanese Patent Application Released No. 2003-153952

Patent Literature 3: Japanese Patent Application Released No. 2003-220092

Essence of a utility model

[0005]

According to the present utility model, there is provided an absorbent article having a longitudinal direction corresponding to a direction from the front side to the back side of a wearer, and a lateral direction orthogonal to the longitudinal direction, wherein the absorbent article includes a crotch portion placed on the crotch part of the wearer's body, a front portion extending from the crotch portion toward the front side of the wearer, and a rear portion extending from the crotch portion toward the rear side of the wearer, the absorbent article including fastening strips provided on both side edges of the rear portion extending longitudinally direction, and a receiving area provided in the front part and configured to be fastened with fastening tapes. The non-skin-facing surface preferably has a receiving area and an area other than the receiving area, and at least the area other than the receiving area is formed from the outer sheet.

The area other than the receiving area preferably has an average coefficient of friction of 0.20 or less.

The ratio of M1 to M2 (M1/M2) is preferably 0.75 or more and 1.25 or less, wherein M1 is the average friction coefficient in the receiving zone and M2 is the average friction coefficient in the zone other than the receiving zone.

[0006]

In addition, in accordance with the present utility model, a package is proposed in which the absorbent product is placed.

The plurality of packages are preferably placed in the packaging bag such that the receiving areas are not brought into contact with each other.

Brief description of drawings

[0007]

[Fig.1]Fig. 1 is a perspective view showing a disposable disposable diaper, which is an absorbent article according to an embodiment of the present utility model.

[Fig.2]Fig. 2 is an expanded plan view schematically showing the skin-facing surface side (inner surface side) of the diaper shown in FIG. 1 in its flattened, unstretched state.

[Fig.3]Fig. 3 is a sectional view taken along line II-II in FIG. 2.

[Fig.4]Fig. 4 is an expanded plan view schematically showing the non-skin surface side (outer surface side) of the diaper shown in FIG. 1 in its flattened, unstretched state.

[Fig.5]Fig. 5 is a partially broken-away view showing a state in which the diaper shown in FIG. 1 is placed in a packaging bag.

[Fig.6]Fig. 6 is an enlarged plan view of the receiving area shown in FIG. 1.

[Fig.7]Fig. 7 is a conceptual diagram for describing a method for evaluating the ease of removal of a diaper in the Examples.

Description of Embodiments

[0008]

In each of the absorbent articles disclosed in Patent Literatures 1 to 3 above, a fastening tape is attached to the sheet itself forming the outer surface of the absorbent article. For reasons related to stably maintaining the state in which such an absorbent article is worn, it is preferable to securely adhere the fastening tape and the sheet forming the outer surface to each other. For these reasons, it is possible to impart a physical property to the surface of the sheet forming the outer surface such that a high adhesive force is provided, but there is a risk that the texture of the outer surface of the absorbent article may be degraded when the sheet has a physical property that provides a high adhesive force, and also There is a risk that snagging may occur when removing the absorbent article from the packaging bag, and that difficulty may occur when removing the absorbent article from the packaging bag.

[0009]

Accordingly, the present utility model relates to an absorbent article that provides the ability to overcome the disadvantages of the prior art described above. The present utility model provides adhesive strength of the fastening tape, excellent texture of the absorbent article, and easy removal of the absorbent article from the packaging bag.

[0010]

Hereinafter, the absorbent article of the present utility model will be described on the basis of preferred embodiments. Fig. 1-4 show a disposable disposable diaper (also referred to hereinafter simply as a “diaper”), which is one embodiment of the absorbent article of the present utility model.

The diaper 1 shown in FIG. 2 has, in its flattened, unstretched state, a longitudinal direction X corresponding to a direction from the front side to the back side of the wearer and extending from the front side to the back side of the wearer through the crotch portion, and a lateral direction Y orthogonal to longitudinal direction X. The diaper 1 includes a front part A placed on the front side of the wearer when worn, a back part B placed on the back side of the wearer when worn, and a crotch part C placed on the crotch part of the body. In other words, the front portion A extends from the crotch portion C toward the front side of the wearer. The rear portion B extends from the crotch portion C toward the rear side of the wearer. Each of the front part A, the crotch part C and the back part B is obtained by dividing the total length of the diaper 1 in the longitudinal direction X into three equal parts and extends continuously in the direction from the front side to the rear side of the wearer. The crotch portion C includes a (not shown) portion facing the release area and is positioned opposite the release area of the wearer's body when wearing the diaper 1.

[0011]

In the description, the expression "in a flat-laid, unstretched state" of the diaper 1 means that the diaper 1 is in a flat-laid state and the elastic member of each part is stretched so that the diaper is expanded to its design size (the size of the diaper in a flat-laid configuration, eliminating any or the effects of elastic elements).

In addition, a “skin-facing surface” is a surface facing the skin of a diaper wearer when considering a diaper or a component thereof (eg, an absorbent member), and a “non-skin-facing surface” is a surface , facing away from the skin of the wearer. In other words, a skin-facing surface is a surface relatively closer to the wearer's skin, and a non-skin-facing surface is a surface relatively further away from the wearer's skin. The expressions “while being worn” and “being worn” refer to the state in which the diaper is worn while maintaining its proper wearing position.

[0012]

As shown in FIG. 3, the diaper 1 includes a liquid-permeable top sheet 2, a minimally liquid-permeable (including water-repellent) leak-proof sheet 3, and a liquid-retaining absorbent member 4 that is disposed between the top sheet. 2 and the anti-leakage sheet 3, and these members form the absorbent assembly 10. In FIG. 3, for convenience of description, the anti-leakage cuff 16, which will be described below, is in a raised state.

In the absorbent set 10, the top sheet 2 is located on the side of the surface of the absorbent element 4 facing the skin. The top sheet 2 is in contact with the skin of the wearer in the wearing state. Each of the top sheet 2 and the anti-leakage sheet 3 is larger in size compared to the size of the absorbent member 4 and projects outward from the outer peripheral edge of the absorbent member 4. In the illustrated embodiment, both edges of the anti-leakage sheet 3 that are end in the longitudinal direction (longitudinal direction X) are substantially coincident with both edges of the diaper 1 end in the longitudinal direction (longitudinal direction X).

[0013]

The diaper 1 includes a liquid-retaining absorbent member 4. The absorbent member 4 shown in FIG. 2 is positioned such that its longitudinal direction coincides with the longitudinal direction X of the diaper, and is positioned such that it extends from the front portion A to the rear portion B through the crotch portion C. Both lateral edges of the absorbent member 4 extending in the longitudinal direction are located inwardly with respect to both lateral edges of the diaper 1 extending in the longitudinal direction X. As shown in FIG. 3, an absorbent member 4 is formed in which the absorbent the absorbent core 4a is covered by a liquid-permeable core wrapping sheet 4b.

[0014]

The diaper 1 includes two anti-leakage cuffs 16 and 16 located along both sides of the absorbent assembly 10 extending along the longitudinal direction X. The anti-leakage cuff 16 includes a thread-like elastic member 16a forming a cuff and a water repellent and a breathable sheet 16b forming a cuff. The elastic member 16a forming the cuff extends in the longitudinal direction in the area of the free end of the leakage cuff 16. The anti-leakage cuff 16 is raised toward the wearer's skin at least in the crotch portion C due to the contraction of the cuff-forming elastic member 16a, thereby preventing secretions such as urine from leaking outward in the lateral direction Y.

[0015]

As shown in FIG. 3, the diaper 1 of this embodiment includes an outer sheet 5 located on the non-skin surface side of the absorbent body 10, that is, closer to the non-skin surface than the sheet 3. protecting against leakage. As shown in FIG. 4, the outer sheet 5 forms the outer surface (non-skin facing surface) of the diaper 1 and extends in the longitudinal direction X from the front portion A to the rear portion B through the crotch portion C. In addition, the outer sheet 5 forms the outer shape diaper 1 in its flat-folded, unstretched state, and the peripheral edges of the outer sheet 5 form contour lines, respectively, of the front portion A, the crotch portion C, and the rear portion B. In FIG. 4, for convenience of description, the cuff-forming elastic member 16a and the elastic the leg assembly forming member 15, which will be described below, is not shown.

As shown in FIGS. 2 and 4, the outline of the diaper 1 of this embodiment is configured such that the area central in the longitudinal direction X, that is, the portion in the crotch portion C, and the portions of the front portion A and the rear portion B located on the side crotch portion C are narrowed, and an end of each of the front portion A and the rear portion B defined in the longitudinal direction X projects outward in the lateral direction with respect to the portions located on the side of the crotch portion C. In other words, the diaper 1 of this embodiment includes a wide portion at each of a front portion A and a rear portion C, and includes a tapered portion that has a smaller width than the wide portion and is located in a longitudinal direction X between these wide portions.

[0016]

The outer sheet 5 projects outward in the lateral direction from both side edges of the absorbent body 4 extending along the longitudinal direction X and forms the side flap portion SF together with the leakage-protecting sheet 3 and the cuff-forming sheet 16b, which forms the cuff-protecting cuff 16 from leakage. The side flap portions SF are portions formed of sheet members extending outward in the lateral direction from both side edges of the absorbent member 4 extending in the longitudinal direction X. These sheet members forming the side flap portion SF extend from the front portion A to the rear portion B through the crotch portion C and connected to each other by a known joining means such as adhesive, heat sealing or ultrasonic welding in projection portions that extends outward in the lateral direction from both side edges of the absorbent member 4.

[0017]

The diaper 1 of this embodiment includes waist flap parts WF, which are respectively formed on those sides of the front part A and the rear part B that are end in the longitudinal direction X, in particular in the area between the front end defined in the longitudinal direction X and defined in the longitudinal direction X by the rear end of the wide portion at the front portion A and the rear portion B, and extend longitudinally outward or laterally outward from the peripheral edge of the absorbent member 4 (see FIG. 2). The waist flap portion WF is a portion formed from a member that is formed on the side of the end of the rear portion B defined in the longitudinal direction X, and extends longitudinally outward or laterally outward from the peripheral edge of the absorbent member 4. In this embodiment, the waistband The valve part WF includes a cuff-forming sheet 1b, a leakage-protecting sheet 3, and an outer sheet 5, which protrude outward from a peripheral edge of the absorbent member 4. These sheets are connected to each other at a portion protruding from the peripheral edge of the absorbent member 4. , using a known joining means such as adhesive, heat sealing or ultrasonic welding. The waist flap portion WF is located around the wearer's waist when wearing the diaper 1. Both sides of the waist flap portion WF defined in the lateral Y direction are also the front end and the rear end of the side flap portions SF defined in the longitudinal X direction.

[0018]

As shown in FIG. 2, in the diaper 1 of this embodiment, on each of both sides of the diaper 1 extending along the longitudinal direction X, in particular, in each of the two side flap portions SF and SF, an elastic member 15 forming leg gathers , is placed in an extended state and extends in the longitudinal direction X through the crotch portion C. Due to the contraction of the elastic members 15, leg gathers are formed in the left and right portions placed around the wearer's legs, that is, on both sides of the diaper 1 extending in the longitudinal direction X In this embodiment, the leg gather forming elastic member 15 is fixed in a state in which it is stretched in the longitudinal direction X between the cuff forming sheet 16b and the leakage protection sheet 3 in the side flap portion SF.

[0019]

As shown in FIGS. 1 and 2, the diaper 1 includes two fastening strips 7 and 7, which are respectively provided on both side edges of the rear portion B extending along the longitudinal direction X. Each of the fastening strips 7 is arranged to protrude outwardly. in the lateral direction from each of both lateral edges of the rear part B extending along the longitudinal direction X. One end of each of the fastening strips 7 on the side inner in the lateral direction Y is fixed in the area of the sheet member forming the diaper 1, preferably between the sheet members, forming a diaper 1, for example, between the leak-proof sheet 3 and the outer sheet 5, although this is not shown. The fastening tape 7 of this embodiment includes a tape body 70 and an adhesive portion 71 attached to a surface of the tape body 70 that faces the skin. The engaging portion 71 has an engaging projection on its skin-facing surface. The engaging portion 71 may be a male member of a mechanical fastener. A mechanical fastener is formed by a male member having a large number of interlocking protrusions on its surface, and a female member having on its surface material capable of directly engaging the interlocking protrusions, and is a fastening means configured such that the male member and the female the element adheres to each other through surface contact. Various known mechanical fasteners can be used without particular limitation.

[0020]

The diaper 1 has, on the surface of the front part A that does not face the skin, a receiving area R1 to which the adhesive portion 71 of the fastening tape 7 is detachably attached. The receiving region R1 of this embodiment is formed such that the attachment member 6 including the female member of the mechanical fastener described above is attached to the non-skin facing surface of the outer sheet 5. In other words, the receiving area R1 of this embodiment is formed by the attachment member 6 provided on the outer sheet 5 at the front portion A. The material forming the part of the attachment member 6 to which the engaging portion 71 is attached, that is, the material of the female member, may be is selected according to the shape of the interlocking protrusion of the interlocking portion 71. As the material of the female member, for example, a loop portion, a mesh portion, or a non-woven material having strong adhesion ability can be used. The receiving region R1 may be formed by a portion of the outer sheet 5 containing a non-woven material having strong adhesive ability, or may be an attachment member 6 provided on the non-skin facing surface of the outer sheet 5 as a member separate from the outer sheet 5.

[0021]

As shown in FIG. 4, the non-skin-facing surface of the diaper 1 has, in the in-plane direction, a receiving region R1 and a region R2 different from the receiving region. Hereinafter, the “R2 zone other than the receiving zone” is also referred to as the “non-receiving R2 zone”. The non-receiving region R2 is a region in which the interlocking portion 71 of the fastening tape 7 is not placed in a wearing state. The non-receiving region R2 may or may not have the ability to be secured to the engaging portion 71. In this embodiment, the non-receiving region R2 is a region located outside the peripheral portion of the receiving region R1.

[0022]

At least the non-receiving region R2 on the non-skin-facing surface of the diaper 1 is formed from an outer sheet 5. The outer sheet 5 may define both a receiving region R1 and a non-receiving region R2. In this case, for reasons related to facilitating the operation of attaching the fastening strip 7, it is preferable that the receiving region R1 and the non-receiving region R2 are visually distinguishable. Examples of the means for enabling recognition of the receiving area R1 and the non-receiving area R2 include a line along the outline of the receiving area R1 and means for marking out the entire receiving area R1 by printing.

[0023]

In the diaper 1 of this embodiment, each of the receiving region R1 and the non-receiving region R2 has an average friction coefficient within the following limits. The average friction coefficient of the outer sheet 5 shown below is a physical characteristic of the non-skin facing surface of the outer sheet 5. The method for determining the average friction coefficient will be described below.

The average friction coefficient M2 of the non-receiving zone R2 is 0.20 or less. The average coefficient of friction can be used as an indicator of the feel of an object's surface, in particular, an indicator of the degree of "adhesion" when touching the object's surface.

When the average friction coefficient in the receiving region R1 is designated M1 and the average friction coefficient in the non-receiving region R2 is designated M2, the ratio of M1 to M2 (M1/M2) is 0.75 or more and 1.25 or less. As the M1/M2 ratio approaches 1.00, the degree of clinging of the receiving zone R1 will be approximately equal to the degree of clinging of the non-receiving zone R2.

[0024]

As shown in FIG. 1, the diaper 1 of this embodiment is formed with a waist hole WH through which the torso of the wearer passes, and two leg holes LH through which the lower parts of the wearer's legs pass when the fastening tape 7 is attached to the receiving area R1 , and the wearer wears the diaper 1 in this state. The authors of the present utility model have found that the adhesive force of the adhesive portion 71 of the fastening tape 7 in the receiving area R1 is guaranteed and the non-skin surface texture of the outer sheet 5 is very good when the average friction coefficients of the receiving area R1 and the non-receiving area R2 are set in the range presented above. As the reason why such an effect occurs, it is considered that in the case where the average friction coefficient in the non-receiving 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 , the adhesive force between the receiving region R1 and the adhesive portion 71 is prevented from decreasing, and the entire outer surface of the diaper 1 has a smooth and uniform feel. With such a diaper 1, the wearing state shown in FIG. 1 can be stably maintained.

Additionally, diapers are typically shipped compressed in a packaging bag. When removing diapers from a packaging bag, the diapers are pulled from the packaging bag as diapers adjacent to each other rub against each other. Since the outer surface of the diaper 1 of this embodiment is smooth, it can be easily removed from the packaging bag.

[0025]

Fig. 5 shows an embodiment of a package P in which a plurality of diapers 1 of this embodiment are placed in a packaging bag 30. In the package P, each of the diapers 1 is folded in half approximately at the center of the crotch portion C along a line bisecting the overall length in the longitudinal direction X, and a plurality of folded diapers 1 are arranged adjacent to each other and placed in the packaging bag 30 in a state in which they are compressed in the thickness direction. In this state, the diapers 1 adjacent to each other are in a state in which the non-skin facing surface of the front portion A of one diaper is in contact with the non-skin facing surface of the rear portion B of the other diaper. In other words, the plurality of diapers 1 are placed in the packaging bag in a state in which the receiving regions R1 are not in contact with each other. With this configuration, the situation in which the receiving regions R1 cling to each other can be prevented, and therefore the diapers 1 can be more easily removed from the packaging bag 30. In the package P shown in FIG. 5, the removal direction XI in which the diaper 1 is removed from the packaging bag 30 substantially aligned with the longitudinal direction X of the diaper 1. In other words, the diaper 1 is removed from the packaging bag 30 substantially in the longitudinal direction X.

[0026]

[Method for determining the average coefficient of friction]

First, a measurement object such as the outer sheet 5 is removed from the diaper. Thereafter, in a state in which a load of 5 kPa (50 gf/cm ² ) is applied to the measurement object such as the outer sheet 5 through the contact member using the KES-FB4 surface roughness measuring instrument (manufactured by Kato Tech Co. ., Ltd.), the contact element is moved 3 cm in the horizontal direction at a constant speed of 0.1 cm/s. The contact element is moved in the longitudinal direction X of the diaper. In this case, the friction coefficient (MIU) of the zone in which the contact element is moved is determined. Such measurements are made at three randomly selected locations, and the average of them is determined as the average coefficient of friction of the sheet.

[0027]

When a constituent member such as the outer sheet 5 is removed from the diaper 1 and the physical properties of the constituent member are determined, in case the constituent member is attached to another constituent member by adhesive or fusion bonding, the attached portion is blown with cold air through a cooling spray to separate the other component element, and thereafter, the adhesive adhered to the component element for which measurements are to be performed is removed by dissolving with an organic solvent. This operation is common to all measurements in this description. In the case of determining a physical characteristic such as the average coefficient of friction of the receiving zone R1, the zone in which at least the engaging part 71 is located is the zone for which measurements must be made. In other words, this area is the area in which the interlocking portion 71 is placed when the fastening strip 7 is placed on the receiving area R1 so that the waist opening WH and the leg opening LH are formed.

In the case of determining a physical characteristic such as the average coefficient of friction of the non-receiving zone R2 of the outer sheet 5, at least the zone of the front part A or the rear part B central in the longitudinal direction X represents the zone for which measurements must be made.

[0028]

For reasons related to further improving the texture of the outer surface of the diaper 1, the M1/M2 ratio is preferably 0.75 or more and more preferably 0.80 or more, the M1/M2 ratio is preferably 1.25 or less and more preferably 1.20 or less, and the M1/M2 ratio is preferably 0.75 or more and 1.25 or less, and more preferably 0.80 or more and 1.20 or less.

For reasons related to providing both the texture of the outer surface of the diaper 1 and the ease of removal of the diaper 1 from the packaging bag, the average friction coefficient M2 of the non-receiving region R2 is preferably 0.10 or more, and more preferably 0.11 or more, preferably 0. 20 or less and more preferably 0.19 or less and preferably 0.10 or more and 0.20 or less and more preferably 0.11 or more and 0.19 or less.

[0029]

For reasons related to more reliably providing the adhesive force between the bonding tape 7 and the receiving region R1, the interfiber distance in the receiving region R1 is preferably 50 μm or more, and more preferably 70 μm or more, preferably 250 μm or less, and more preferably 200 μm or less and is preferably 50 µm or more and 250 µm or less and more preferably 70 µm or more and 200 µm or less. With this configuration, it is possible to ensure sufficient adhesion space for the fastening strip 7 and to more reliably provide the adhesive force. The interfiber distance is determined by a method that will be described below. For reasons related to more reliably providing the above effects, the interlocking portion 71 of the fastening tape 7 is preferably configured with a large number of interlocking projections on the surface.

[0030]

<Inter-fiber distance determination method>

The interfiber distance (average interfiber distance) for a fiber accumulation such as a nonwoven fabric or paper is obtained by the following formula (1) based on the Wrotnowski assumption. Formula (1), as a rule, is used to obtain the interfiber distance in a cluster of fibers. Based on the assumption made by Wrotnowski, the fibers are cylindrical and arranged regularly without crossing. The interfiber distance in the receiving region R1 for which measurements are to be performed is calculated using the formula (1) below. Each of the thickness t, areal density W, density ρ of the fiberizing resin, and diameter D of the fibers used in Formula (1) below is the average of the values obtained from measurements at a plurality of randomly selected measurement locations in the part holding loose stools.

Thickness t (mm) is measured using the method below. First, a piece with dimensions of 100 mm in the longitudinal direction × 100 mm in the width direction (the direction orthogonal to the longitudinal direction) is cut from the receiving region R1 of the outer sheet. In the event that it is not possible to obtain a cut piece with the given dimensions, the largest possible cut piece is obtained. Thereafter, the cut piece is placed on the flat plate, then the flat glass plate is placed on the flat plate, and a weight is evenly placed on the glass plate so that the load including the glass plate is 0.05 kPa, and the thickness of the cut piece is measured. In the measurement environment, the temperature is (20±2)°C and the relative humidity is (65±5)%. The measuring device is a microscope (manufactured by KEYENCE CORPORATION, VHX-1000). Using a measuring device, an enlarged photograph of the plane of the cut piece formed by the cutting is obtained. An enlarged photograph also includes an image of an object of known dimensions. After this, the scale is combined with an enlarged photograph of the plane of the cut piece formed by cutting, and the thickness of the cut piece is measured. The above process is repeated three times, and the average of the three is determined as the thickness t of the receiving zone R1.

[0031]

The area density W (g/m ² ) is obtained by cutting out the receiving area R1 with given dimensions (e.g. 100 mm × 100 mm) and - after measuring the mass - dividing the measured mass by the area obtained from the given size ("area density W (g) /m ² ) = mass ÷ area obtained based on the given size"). The measurement is repeated four times and the average of the four is determined as the surface density.

The density ρ (g/cm ³ ) of the fiberizing resin is determined using a density gradient tube in accordance with the measurement method which is the density gradient tube measurement method disclosed in JIS L1015 Test Method for Man-made Staple Fibers (JIS - Japanese Industrial Standard) (URL: http://kikakurui.com/l/L1015-2010-01.html and disclosed in JIS Handbook Fiber-2000 (Japanese Standards Association), pp. 764-765).

The method for determining the diameter D of fibers corresponds to the <Method for measuring fiber diameter>, which will be described below.

[0032]

[Math Expression 1]

average interfiber distance ,

D - fiber diameter, µm;

ρ is the density of the resin intended for the formation of fibers, g/cm ³ ;

t - thickness, mm;

W - surface density, g/ ^m2 .

[0033]

<Method for measuring fiber diameter>

The receiving region R1 is cut with a razor (for example, a single-edge razor manufactured by FEATHER Safety Razor Co., Ltd.), whereby a measurement sample having a rectangular shape (8 mm × 4 mm) in a plan view is obtained. When cutting a measurement object, care should be taken not to destroy the plane structure of the measurement specimen formed by cutting, which is obtained by cutting, under the influence of pressure during cutting. Examples of preferred methods for cutting a measurement object include a method in which the measurement object is placed in liquid nitrogen to freeze it sufficiently before cutting the measurement object and thereafter cut. Using double-sided paper tape (NICE TACK NW-15, manufactured by Nichiban Co., Ltd.), the measurement sample is attached to the sample stage. The measurement sample is then coated with platinum. For coating, an E-1030 (product name) ion sputtering device manufactured by Hitachi Naka Seiki Kabushiki Kaisha is used, and the sputtering time is 30 seconds. The cross section of the measurement sample is examined at 1000x magnification using an S-4000 field emission scanning electron microscope manufactured by Hitachi, Ltd. Subsequently, the component fibers on the non-skin-facing surface of the measurement sample are measured with a length in the width direction relative to the longitudinal direction for each of the 10 fibers, and their average is determined as the fiber diameter.

[0034]

For reasons related to more stable maintenance of the wearing condition of the diaper 1, the adhesive force between the fastening tape 7 and the receiving region R1 is preferably 2.0 N or more, and more preferably 2.5 N or more, preferably 6.0 N or less or more preferably 5.5 N or less, and 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 adhesive force can be measured by a method of measuring the adhesive force [the adhesive force between the fastening tape and the receiving region] in an example that will be described below.

[0035]

For reasons of further preventing snagging on the outer surface of the diaper 1 (the surface not facing the skin) and facilitating removal of the diaper 1 from the packaging bag, the area of the receiving area R1 is preferably 3% or more and more preferably 5% or more of the area of the outer sheet 5 is preferably 30% or less and more preferably 25% or less of the area of the outer sheet 5, and preferably is 3% or more and 30% or less, and more preferably 5% or more and 25% or less of the area of the outer sheet 5.

[0036]

For reasons related to ensuring that the average friction coefficient of each of the receiving region R1 and the non-receiving region R2 in the outer sheet 5 is in the above range, the outer sheet 5 preferably has any of the following Configurations (1) to (10), and more preferably has two or more of Configurations (1) - (10).

Configuration (1): The constituent fibers have a fineness of 0.05 dtex or more and 2.0 dtex or less.

Configuration (2): Indentations and projections are formed on a surface not facing the skin.

Configuration (3): Many holes are formed.

Configuration (4): The constituent fibers are oriented in the longitudinal X direction on the surface not facing the skin.

Configuration (5): The non-skin surface is embossed.

Configuration (6): The surface not facing the skin is treated to close the pores.

Configuration (7): The outer sheet 5 contains an emollient. Configuration (8): Hollow fibers are included as constituent fibers.

Configuration (9): Flat fibers are present on the surface not facing the skin.

Configuration (10): The surface not facing the skin contains infusible fibers.

[0037]

With respect to the above Configuration (1), it should be noted that by using constituent fibers having fine fineness, the surface of the outer sheet 5 can become better and the surface can become smoother. For the above reasons, the fineness of the constituent fibers of the outer sheet 5 is preferably 0.05 dtex or more, preferably 2.0 dtex or less, and more preferably 1.5 dtex or less, and preferably 0.05 dtex or more and 2.0 dtex or less and more preferably 0.05 dtex or more and 1.5 dtex or less.

[0038]

[Method for determining fiber fineness]

From the sheet for which measurements are to be made, a piece with a rectangular shape and dimensions of 50 mm × 100 mm (area: 5000 mm ² ) is cut to obtain a sample for measurement. Thereafter, each thickness of 10 standard fibers located at a location 0.05 mm in the thickness direction from the surface of the measurement sample not facing the skin is measured in a cross-sectional view of the measurement sample using an electron microscope to calculate the average thickness Dn ( µm) fibers. The resin forming standard fibers located at a location 0.2 mm in the thickness direction from the skin-facing surface is then determined and a differential scanning calorimeter (DSC) is used to obtain the theoretical density Pn (g/cm ³ ) of the fiber placement . Based on the obtained average thickness Dn (μm) of fibers and the theoretical density Pn (g/cm ³ ) of fiber placement, the mass (g) is calculated per 10,000 m of fiber length, and the calculated value is set as the fineness (dtex) of the constituent fiber from the layer of fibers, located on the side facing the skin.

[0039]

With respect to the above Configuration (2), it should be noted that the recesses and protrusions formed on the non-skin facing surface of the outer sheet 5 are formed with a predetermined configuration in a plan view. As the predetermined configuration, a known configuration that is used for the topsheet of the absorbent article can be suitably selected. Since the recesses and projections are formed on the surface, the contact area of the outer sheet 5 is reduced, and thus, for reasons related to facilitating control of the average friction coefficient, the recesses and projections are preferably formed in a direction angled relative to the lateral direction Y, and more preferably formed in a direction along the longitudinal direction X. The recesses and projections on the surface of the sheet can be formed in a known manner.

[0040]

With respect to the above Configuration (3), it should be noted that in the case where a plurality of holes are formed in the outer sheet 5, the average friction coefficient can be easily adjusted. For these reasons, a plurality of holes are preferably formed in the outer sheet 5 with a dot pattern in a plan view. For the above reasons, the area ratio of the holes in the unit area of the outer sheet 5 is preferably 5% or more and more preferably 10% or more, preferably 25% or less and more preferably 20% or less and preferably 5% or more and 25% or less and more preferably 10% or more and 20% or less.

For the above reasons, the size of the holes, that is, the area of the holes, is preferably 0.3 mm ² or more and more preferably 0.5 mm ² or more, preferably 10 mm ² or less and more preferably 7 mm ² or less and 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. Each value from the fraction of the hole area from the unit area and the hole area is obtained by a method that will be described below. The hole may be formed by using, for example, a cutting device provided with a cutting roller and an anvil roller and having a cutting blade shaped to fit the contour of the hole on an outer peripheral surface of the cutting roller.

[0041]

[Method for determining the proportion of hole area from unit area and hole area]

Measurement samples with dimensions of 30 mm in the longitudinal direction X and 30 mm in the lateral direction Y are cut from three randomly selected places of the outer sheet 5. After this, the total area of the holes in the measurement samples is measured, and the proportion of the total area of the holes from the unit area (100 mm ² for a square with a side length of 10 mm) is calculated based on this total area and the area of the measurement sample. Such measurements are carried out in three randomly selected places of the outer sheet 5, and the average value for them is determined as the proportion of the area of the holes from the unit area.

To determine the area of the holes, 10 any holes are selected from a measurement sample cut in the same way as in the method for determining the proportion of hole area from a unit area, and such area is measured. Such measurements are carried out at three randomly selected locations of the outer sheet 5, and the average value for them is determined as the area of the holes.

[0042]

With respect to the above Configuration (4), it should be noted that in the case where the fibers are oriented in the longitudinal X direction, the sheet can be felt as smooth in the longitudinal X direction. Whether the constituent fibers are oriented in the longitudinal X direction can be determined by determining whether whether the angle formed by the constituent fibers and the longitudinal direction X is within ±30 degrees. Particularly, when the surface of the outer sheet 5 not facing the skin is examined by an electron microscope under magnification, and 70% or more of the fibers of all the constituent fibers in the viewing field form an angle with respect to the X direction within ±30 degrees, it can be determined that the constituent fibers of the outer sheet 5 are oriented in the longitudinal direction X.

[0043]

With respect to the above Configuration (5), it should be noted that in the case where the sheet is embossed, the contact area of the sheet can be reduced and the average friction coefficient can be more easily adjusted. Examples of embossing may include heat-free compression embossing, hot stamping, ultrasonic embossing and high-frequency embossing.

For reasons related to making the sheet feel smoother, embossed portions formed by embossing are preferably formed in the outer sheet 5 with a dot pattern.

For the above reasons, the area ratio of the embossed portions of the unit surface area of the outer sheet 5 not facing the skin is preferably 5% or more, and more preferably 10% or more, preferably 25% or less, and more preferably 20% or less, and preferably 5% or more and 25% or less and more preferably 10% or more and 20% or less.

For the above reasons, the area of the embossed portion on the non-skin facing surface of the outer sheet 5 is preferably 0.3 mm ² or more, and more preferably 0.5 mm ² or more, preferably 10 mm ² or less, and more preferably 7 mm ² or less and is 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 one embossed portion. The proportion of the area of the embossed part from the unit area and the area of the embossed part is determined by replacing the term “hole” in the “Method for determining the proportion of the area of the holes from the unit area and the area of the hole” described above with the term “embossed part”.

[0044]

With respect to the above Configuration (6), it should be noted that the pore closing treatment is a treatment for closing the voids between the constituent fibers of the sheet, and thus the surface of the sheet can be made smoother. Examples of pore closing treatments may include heat treatment, ultrasonic treatment and coating treatment. As the liquid used in the coating processing, a liquid is used in which the volatile components present in the liquid evaporate after coating and only the solid components remain on the sheet. Examples of this liquid may include a natural extract found in a skin care product, an oil product, and an ink used in printing. The oily agent preferably has a high viscosity.

[0045]

With respect to the above Configuration (7), it should be noted that the feel of the sheet can be further improved by using an emollient. The emollient content of the outer sheet 5 is preferably 0.03 mass% or more, and more preferably 0.1 mass% or more, preferably 10 mass% or less, and more preferably 6 mass% or less and is preferably 0.03 mass% or more and 10 mass% or less and more preferably 0.1 mass% or more and 6 mass% or less. The emollient content of the leaf is determined by the following method. First, a portion of the sheet to be measured is cut out where the sheets are not joined by hot-melt adhesive or fusion bonding, resulting in a test specimen. The weight of the test sample dried by electrical means at 60° C. for 1 hour is measured, and the measured weight is set as the initial weight. Thereafter, the test sample is immersed in acetone for 2 hours and dried naturally for 1 week, the weight of the test sample dried by electrical means at 60° C. for 1 hour is measured, and the measured weight is determined as the weight without emollient. The value obtained by subtracting the mass without emollient from the original mass is then divided by the mass without emollient and expressed as a percentage (%) which is defined as the emollient content.

[0046]

With respect to the above Configuration (8), it should be pointed out that since the constituent fibers include hollow fibers, the sheet can be made softer and can provide an improved skin feel. For such reasons, the area density of the hollow fibers in the outer sheet 5 is preferably 5 g/ ^m2 or more, and more preferably 8 g/ ^m2 or more, preferably 15 g/ ^m2 or less, and more preferably 20 g/ ^m2 or less and is preferably 5 g/ ^m2 or more and 20 g/ ^m2 or less, and more preferably 8 g/ ^m2 or more and 15 g/ ^m2 or less.

[0047]

With respect to the above Configuration (9), it should be noted that in the case where there are flat fibers, the surface of the sheet can be smoother. A flat fiber is a fiber having a cross-sectional flattening ratio (major axis length/minor axis length) of 1.2 or more. For example, the degree of flattening is 1 when the cross-section of the fiber is perfectly circular, and the degree of flattening becomes greater than 1 as the degree of flattening of the cross-section increases (as it approaches an elliptical shape).

For reasons related to making the outer sheet 5 feel smoother against the skin, the proportion of flat fibers present on the non-skin facing surface of the outer sheet 5 is preferably 60% or more, and more preferably 70% or more. There is no particular limitation on the upper limit of the proportion of flat fibers present, and the proportion may be 100%. This proportion of available flat fibers is determined by the method below.

[0048]

[Method for determining the proportion of flat fibers present]

The outer sheet 5 is removed from the diaper 1, and a sample for measurement is cut out from a randomly selected area. The measurement sample has a rectangular shape (8 mm × 4 mm) in plan view and is obtained by cutting the outer sheet 5 with a razor (for example, a single-edge razor manufactured by FEATHER Safety Razor Co., Ltd.). When cutting the outer sheet 5, care must be taken not to destroy the plane structure of the cutting measurement sample obtained by cutting under the influence of pressure during cutting. Examples of preferred cutting methods include a method in which the outer sheet 5 is placed in liquid nitrogen to freeze it sufficiently before cutting the outer sheet 5 and then cut. Using double-sided paper tape (NICE TACK NW-15, manufactured by Nichiban Co., Ltd.), the measurement sample is attached to the sample stage. The measurement sample is then coated with platinum. When applying the coating, an E-1030 (product name) ion sputtering device manufactured by Hitachi Naka Seiki Kabushiki Kaisha is used, and the sputtering time is 30 seconds. Thereafter, the cut surface of the measurement sample is examined at 1000 times magnification using an S-4000 field scanning electron microscope manufactured by Hitachi, Ltd. The cross-sections of the fibers present on the second surface 62 are inspected on the cut surface of the measurement specimen, the major axis length and the minor axis length of the fiber cross-section are measured, and the major axis length is divided by the minor axis length to calculate the degree of fiber flattening. The degree of flattening is determined for 10 fibers, and the ratio of the number of fibers having a degree of flattening (major axis length/minor axis length) of 1.2 or more to 10 fibers is obtained, and the resulting proportion is determined as the proportion (%) of flat fibers present.

[0049]

Examples of the method for producing flat fibers, that is, fibers having a high degree of flattening of the cross section, may include various known methods from 1) a method of spinning by using a spinneret having a degree of flattening corresponding to a predetermined degree of flattening, and 2) a method of performing post-processing such as compression, on a collection of fibers obtained using a standard spinneret (having a cross-section with the shape of a perfect circle or a shape similar to the shape of a perfect circle). For reasons related to reliably aligning the major axis direction of the flat fibers toward the nonwoven fabric in the plane to further improve the smoothness of the outer sheet 5, method 2) is preferred. The above method 2) can be performed for densifying a fiber cluster (nonwoven fabric) containing fibers having a cross section with a perfect circle shape by applying pressure while heating as necessary. This method can be carried out, for example, by calendering.

[0050]

With respect to the above Configuration (10), it should be noted that in the case where the non-skin facing surface contains non-melting fibers that are not melted by heat or the like, a non-melting portion is formed when the constituent fibers are converted into a non-woven material. Since the constituent fibers in the unmelted portion maintain the shape of the fibers, the constituent fibers can easily move when subjected to external force, and friction can be reduced. For such reasons, the content of infusible fibers in the outer sheet 5 is preferably 0.1 mass% or more, and more preferably 0.5 mass% or more, preferably 20.0 mass% or less, and more preferably 10.0 wt.% or less and preferably 0.1 wt.% or more and 20.0 wt.% or less and more preferably 0.5 wt.% or more and 10.0 wt.% or less of the total weight of the outer sheet 5.

Examples of non-fusible fibers include natural fibers such as pulp and cotton fibers, and cellulosic fibers such as hydrated cellulose fibers, lyocell fibers and Tencel fibers, and these fibers can be used alone or in combination of two or more types. .

[0051]

For reasons related to further enhancing the smoothness or softness of the sheet, in the case where the outer sheet 5 is a through-air bonded nonwoven material, it is particularly preferable to have any one or more of the above Configurations (8) to (10), and more preferably have two or more of the above Configurations (8) - (10).

[0052]

For reasons related to providing an overall texture of the diaper 1 that creates a uniform feel, the diaper 1 preferably has an average coefficient of friction of the constituent elements forming the skin-facing surface that is similar to the average coefficient of friction of the constituent elements forming the non-skin-facing surface. In other words, the component and the sheet member capable of coming into contact with the skin of the wearer in the wearing state, of the constituent members forming the skin-facing surface of the diaper 1, preferably have an average coefficient of friction within the following limits. Examples of the “component and sheet member capable of contacting the wearer's skin” may include the cuff-forming sheet 16b, the sheet forming the skin-facing surface of the waist flap WF, and the top sheet 2.

When the average friction coefficient of the cuff forming sheet 16b is designated M3 and the average friction coefficient in the non-receiving region R2 is designated M2, the ratio of M3 to M2 (M3/M2) is preferably 0.75 or more, and more preferably 0.8 or more, preferably 1.25 or less and more preferably 1.2 or less and preferably 0.75 or more and 1.25 or less and more preferably 0.8 or more and 1.2 or less. The average friction coefficient M3 of the cuff forming sheet 16b is preferably 0.10 or more, and more preferably 0.11 or more, preferably 0.25 or less, and more preferably 0.24 or less, and preferably 0.10 or more and 0.25 or less and more preferably 0.11 or more and 0.24 or less.

[0053]

When the average friction coefficient on the skin-facing surface of the waist flap WF is designated M4 and the average friction coefficient in the non-receiving area R2 is designated M2, the ratio of M4 to M2 (M4/M2) is preferably 0.75 or more, and more preferably 0.8 or more preferably is 1.25 or less and more preferably 1.2 or less and preferably is 0.75 or more and 1.25 or less and more preferably 0.8 or more and 1.2 or less.

The average friction coefficient M4 on the skin-facing surface of the waist flap WF is preferably 0.10 or more, and more preferably 0.11 or more, preferably 0.25 or less, and more preferably 0.24 or less, and 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 M4 on the skin-facing surface of the waist flap WF is equal to the average friction coefficient of the sheet member forming the skin-facing surface of the waist flap WF.

Since in this embodiment, the skin-facing surface of the waist flap WF is formed by the cuff-forming sheet 16b, the average friction coefficient M4 on the skin-facing surface of the waist flap WF is the average friction coefficient on that surface of the cuff-forming sheet 16b which facing the skin. Alternatively, the skin-facing surface of the waist flap WF may be formed by a sheet member separate from the cuff-forming sheet 16b.

[0054]

When the average friction coefficient of the top sheet 2 is designated M5 and the average friction coefficient in the non-receiving region R2 is designated M2, the ratio of M5 to M2 (M5/M2) is preferably 0.75 or more, and more preferably 0.8 or more, preferably 1.25 or less and more preferably 1.2 or less and preferably 0.75 or more and 1.25 or less and more preferably 0.8 or more and 1.2 or less.

The average friction coefficient M5 of the top sheet 2 is preferably 0.10 or more and more preferably 0.11 or more, preferably 0.25 or less and more preferably 0.24 or less and preferably 0.10 or more and 0.25 or less and more preferably 0.11 or more and 0.24 or less.

[0055]

For reasons of maintaining the average coefficient of friction within the above limits, each of the cuff forming sheet 16b, the sheet member forming the skin-facing surface of the waist flap WF, and the top sheet 2 preferably has any one or more of the above Configurations (1) (10) and more preferably has two or more of the above Configurations (1) - (10). In this case, the term “outer sheet 5” in the above Configurations (1) to (10) is replaced by the term “cuff forming sheet 16b”, “sheet member forming the skin-facing surface of the waist flap WF” or “top sheet 2”. [0056]

As described above, the receiving region R1 of this embodiment is formed from the attachment member 6, and the attachment member 6 is attached to the non-skin facing surface of the outer sheet 5 (see FIG. 6).

When the receiving area R1 is formed from the attachment member 6, for reasons related to facilitating removal of the diaper 1 from the packaging bag 30, the thickness of each of the attachment member 6 and the outer sheet 5 is preferably within the ranges below.

The thickness of the attachment member 6 is preferably 10% or more and more preferably 20% or more, preferably 80% or less and more preferably 70% or less and preferably 10% or more and 80% or less and more preferably 20% or more than 70% or less of the outer sheet thickness 5.

The thickness of the attachment member 6 is preferably 0.05 mm or more and more preferably 0.1 mm or more, preferably 0.5 mm or less and more preferably 0.4 mm or less and preferably 0.05 mm or more and 0.5 mm or less and more preferably 0.1 mm or more and 0.4 mm or less.

The thickness of the outer sheet 5 is preferably 0.05 mm or more, and more preferably 0.1 mm or more, preferably 0.7 mm or less, and more preferably 0.6 mm or less, and preferably 0.05 mm or more and 0 .7 mm or less and more preferably 0.1 mm or more and 0.6 mm or less. The thickness of each of the outer sheet 5 and the attachment member 6 is measured using a laser displacement meter,

which is a non-contact type meter (for example, the RV 3-55R displacement meter with an LK-2100 laser head, manufactured by KEYENCE CORPORATION). The pressure during thickness measurement should be 1.7 kPa. The measurement is performed five times, and the average of the five measurements is determined as the thickness of each of the outer sheet 5 and the attachment member 6.

[0057]

The attachment member 6 of this embodiment has a low thickness region (not shown) in which the thickness is less than 50% of the maximum thickness of the attachment member 6. A thin zone may be formed by subjecting the attachment member 6 to pressure, for example by embossing.

For reasons related to ease of removal of the diaper 1 from the packaging bag, the area of the thin zone is preferably 30% or more and more preferably 35% or more, preferably 90% or less and more preferably 85% or less and preferably 30% or more and 90% or less, and more preferably 35% or more and 85% or less of the area of the attachment member 6. [0058]

The proportion of the area of the low-thickness zone from the area of the element 6 for attachment is determined by the method below.

First, a measurement sample having dimensions of 60 mm in the longitudinal direction × 30 mm in the lateral direction is cut out from the attachment member 6. The measurement sample is placed on a horizontal table in an uncompressed state so that the surface not facing the skin is facing upward. A transparent acrylic plate is placed on the measurement sample, and in addition, a weight is placed on the acrylic plate so that the measurement sample is compressed under a load of 1.7 kPa. Thereafter, the surface profile of the compressed measurement sample to be measured is measured using a KS-1100 high-precision profilometric system manufactured by KEYENCE CORPORATION. More specifically, the thickness of each location of the measurement sample is measured. Under measurement conditions defined by a measurement pitch of 50 μm and a moving speed of 10 cm/s, the measurement is performed within an area with dimensions of 30 mm in the longitudinal direction × 30 mm in the lateral direction. The measurement results (images) thus obtained are analyzed using KEYENCE CORPORATION's KS-Analyzer application for shape/profile analysis. Thereafter, a location in the measurement sample where the thickness is the maximum thickness and a location where the thickness is 50% or more of the maximum thickness are separated, and the allocated location is defined as a “large thickness zone.” In addition, the location where the thickness is less than 50% of the maximum thickness in the measurement sample is defined as a “small thickness zone.” The area of the thin zone is measured through a process of binarizing the thick zone and the thin zone. Specifically, images are captured in the Image-Pro Plus system from Nippon Roper, Co., Ltd., and by increasing the contrast, the white/black contrast is set to 100. After removing the distortion through filtering (using a 5x5 median filter five times ) perform a count to determine the total area of thin zones displayed in white or black. Thereafter, the area fraction of the thin zone from the area of the attachment member 6 is obtained by dividing the total area of the thin zone by the area of the measurement specimen (30 mm in the longitudinal direction × 30 mm in the lateral direction).

[0059]

The attachment member 6 of this embodiment has a shape elongated in the lateral Y direction in a plan view. The attachment member 6 is attached to the non-skin-facing surface of the outer sheet 5 in a region of both ends defined in the longitudinal direction X. Specifically, as shown in FIG. 6, the attachment member 6 includes connected areas 61 and 61, in which the attachment member 6 and the outer sheet 5 are connected, at both ends defined in the longitudinal direction X.

For reasons related to facilitating the removal of the diaper 1 from the packaging bag 30, the length L6 (see FIG. 6) of the connected area 61, defined in the lateral Y direction, is preferably 80% or more, and more preferably 85% of the total length of the element 6 for As for the proportion of the length L6 of the connected area 61 in the lateral Y direction of the total length of the attachment member 6 defined in the lateral Y direction, the upper limit is not particularly limited, but is preferably 100% for the above reasons. , that is, the end of the attachment member 6 defined in the longitudinal direction X is preferably attached to the outer sheet 5 continuously over the entire length of the attachment member 6 defined in the lateral direction Y.

[0060]

In this embodiment, the outer sheet 5 and the attachment member 6 are connected by an adhesive. As the adhesive, a known adhesive such as a hot melt adhesive can be used.

For reasons of further improving the non-skin surface texture of the diaper 1 while ensuring bond strength between the outer sheet 5 and the attachment member 6, the amount of adhesive used to join the outer sheet 5 and the attachment member 6 is preferably 10 g/ ^m2 or more and more preferably 15 g/ ^m2 or more, preferably 30 g/ ^m2 or less and more preferably 25 g/m2 ^or less and preferably 10 g/ ^m2 or more and 30 g/m2 m ² or less and more preferably 15 g/m ² or more and 25 g/m ² or less.

[0061]

The materials constituting each of the portions of the diaper in the embodiments described above will be described. Each of the leakage protection sheet 3 and the absorbent body 4 can be formed using materials generally used in an absorbent article without particular limitation.

The anti-leakage sheet 3 may be formed by using a minimal liquid-permeable resin film or a laminate of a resin film and a nonwoven material.

The absorbent core 4a of the absorbent body 4 can be formed by using a cluster of hydrophilic fibers such as wood pulp fibers or hydrophilized synthetic fibers or a material obtained by holding an absorbent polymer in the cluster. In addition, the core wrapping sheet 4b can be formed using the same material as the material used for the top sheet 2, which will be described below.

[0062]

In addition, the sheet members forming the skin-facing surface of the diaper 1, such as the outer sheet 5, the top sheet 2 and the cuff forming sheet 16b, can be formed by using nonwoven materials produced by various methods, and can be formed by using, for example, spunbonded nonwovens, through-bonded nonwovens, hydrospun nonwovens, hot roller bonded nonwovens, meltblown nonwovens, or multilayer nonwovens of the above nonwovens. Examples of multilayer nonwoven fabrics may include multilayer nonwoven fabrics (SM structure nonwoven fabrics and SMS structure nonwoven fabrics) containing a spunbond nonwoven fabric layer (S).

The outer sheet 5 and the top sheet 2 may be formed by a single sheet or alternatively may be formed by a laminate of multiple sheets. The cuff forming sheet 16b may be formed by using a water-repellent non-woven material.

[0063]

The elastic members of the cuff-forming elastic member 16a in the leak-proof cuff 16 and the leg gather-forming elastic member 15 can be formed by using various known elastic materials commonly used in this type of absorbent article without particular limitation. Examples of elastic materials include synthetic rubbers such as styrene butadiene rubbers, butadiene rubbers, isoprene rubbers or neoprene rubbers, natural rubbers, ethylene vinyl acetate (EVA), elastic polyolefins and polyurethanes. Regarding the shape of the elastic element, it is preferable to use a filament-like element (eg, rubber thread) or a ribbon-like element (eg, flat elastic) with a rectangular, square, circular, polygonal cross-section, or a multi-filament type thread-like element.

[0064]

The tape body 70 and the adhesive portion 71 forming the fastening tape 7 and the attachment member 6 may be formed from materials generally used for a disposable disposable diaper, without limitation. In addition, the shape of the interlocking projections in the interlocking portion 71 is not particularly limited, and may be a hook shape, an anchor shape, or a curved shape.

Mechanical fasteners such as "Magic tape" (registered trademark) (manufactured by Kuraray Fastening Co., Ltd.), "Quicklon" ( registered trademark) (manufactured by YKK Corporation) and "Magicloth" (registered trademark) (manufactured by Kanebo Belltouch Co., Ltd.). For reasons related to facilitating adhesion, a through-air bonded nonwoven material is preferably used as the nonwoven material for the attachment member 6.

The tape base 70 may be formed from synthetic resins such as polyethylene, polypropylene and polyethylene terephthalate, and from sheets and nonwovens formed from composite materials consisting of two or more of these synthetic resins.

[0065]

Although a preferred embodiment of the present utility model has been described above, the present utility model is not limited to the above embodiment.

In addition, the absorbent article described above is a so-called disposable opening-type diaper having an attached tape, but the utility model is applicable, for example, to a tape-like member removably attached to a diaper cover member (pad holder) or a member located below waist, and can be used for infants or adults. The absorbent article of the present utility model broadly covers articles used to absorb bodily fluids (eg, urine, loose stool, menstrual blood, and sweat) discharged from the human body. For example, absorbent articles include urinary pads, sanitary napkins and sanitary panties.

[0066]

The following absorbent article will be disclosed in connection with the above-described embodiment of the present utility model.

<1> An absorbent article having a longitudinal direction corresponding to a direction from the front side to the back side of the wearer, and a lateral direction orthogonal to the longitudinal direction,

wherein the absorbent product contains:

- a crotch part placed on the crotch part of the wearer's body;

- a front part extending from the crotch part towards the front side of the wearer; And

- a rear portion extending from the crotch portion toward the rear side of the wearer;

wherein the absorbent product contains:

- fastening strips provided on both lateral edges of the rear part, extending along the longitudinal direction; And

- a receiving area provided in the front part and configured to be fastened with fastening tapes,

wherein the surface not facing the skin has a receiving zone and a zone other than the receiving zone, and at least the zone other than the receiving zone is formed from the outer sheet, the zone other than the receiving zone has an average friction coefficient of 0 .20 or less, and

the ratio of M1 to M2 (M1/M2) is 0.75 or more and 1.25 or less,

wherein M1 represents the average friction coefficient in the receiving zone, and M2 represents the average friction coefficient in the zone other than the receiving zone.

[0067]

<2> The absorbent article of item <1>, wherein the average friction coefficient M2 of the zone other than the receiving zone is 0.10 or more and 0.20 or less, and preferably 0.11 or more and 0.19 or less.

<3> The absorbent article of item <1> or <2>, wherein the interfiber distance in the receiving region is 50 μm or more and 250 μm or less, and preferably 70 μm or more and 200 μm or less.

<4> The absorbent article according to any one of paragraphs <1> - <3>, further comprising an absorbent assembly including a liquid retention absorbent element, and two anti-leakage cuffs located along both sides of the absorbent assembly extending along the longitudinal directions, while

each of the leak-proof cuffs includes: - a sheet forming the cuff; And

an elastic element extending in the longitudinal direction and located in the area of the free end of the leakage cuff, and

the ratio of M3 to M2 (M3/M2) is 0.75 or more and 1.25 or less,

wherein M3 is the average coefficient of friction of the sheet forming the cuff, and M2 is the average coefficient of friction in a zone other than the receiving zone.

<5> The absorbent article according to item <4> or <5>, wherein the average friction coefficient M3 of the sheet forming the cuff is 0.10 or more and 0.25 or less, and preferably 0.11 or more and 0.24 or less.

<6> The absorbent article according to any one of paragraphs <1> - <5>, further comprising:

liquid retaining, absorbent element; And

waist flap portions that are located at the longitudinally defined ends of the front portion and the rear portion and that extend longitudinally outward or laterally outward from the peripheral edge of the absorbent member,

wherein the ratio of M4 to M2 (M4/M2) is 0.75 or more and 1.25 or less,

wherein M4 represents the average coefficient of friction on the skin-facing surface of the waist flap, and M2 represents the average coefficient of friction in a region other than the receiving region.

<7> The absorbent article of item <6>, wherein the average friction coefficient M4 on the skin-facing surface of the waist flap is 0.10 or more and 0.24 or less, and preferably 0.11 or more and 0.25 or less.

[0068]

<8> The absorbent article as set forth in any one of <1> to <7>, further comprising a liquid-retaining absorbent member and a top sheet that is located on the skin-facing surface of the absorbent member and that is in contact with the skin of the wearer in a worn state. , wherein

the ratio of M5 to M2 (M5/M2) is 0.75 or more and 1.25 or less,

wherein M5 represents the average friction coefficient of the top sheet, and M2 represents the average friction coefficient in a zone other than the receiving zone.

<9> The absorbent article according to item <8>, wherein the average friction coefficient M5 of the top sheet is 0.10 or more and 0.25 or less, and preferably 0.11 or more and 0.24 or less.

<10> The absorbent article according to any one of paragraphs <1> - <9>, further comprising an absorbent assembly including a liquid retention absorbent element, and two anti-leakage cuffs located along both sides of the absorbent assembly extending along the longitudinal directions, with each of the leakage cuffs including:

- sheet forming the cuff; And

- an elastic element extending in the longitudinal direction and located in the area of the free end of the cuff protecting against leakage, and

The absorbent article further includes:

- waist flap parts which are located on the side of the longitudinally defined ends of the front part and the rear part and which extend longitudinally outward or laterally outward from the peripheral edge

absorbent element; And

- a top sheet that is located on the skin side of the absorbent member surface and that is in contact with the skin of the wearer in the wearing state, and any one or two or more of the outer sheet, the cuff forming sheet, the waist flap surface forming sheet , facing the skin, and the top sheet have one or more of Configurations (1) - (10):

Configuration (1): The constituent fibers have a fineness of 0.05 dtex or more and 2.0 dtex or less;

Configuration (2): depressions and projections are formed on a surface not facing the skin;

Configuration (3): a plurality of holes are formed;

Configuration (4): the constituent fibers are oriented in the longitudinal direction on the surface not facing the skin;

Configuration (5): the non-skin surface is embossed;

Configuration (6): the surface not facing the skin is treated to close the pores;

Configuration (7): the sheet contains an emollient; Configuration (8): hollow fibers are included as constituent fibers;

Configuration (9): flat fibers are present on the surface not facing the skin; And

Configuration (10): The surface not facing the skin contains infusible fibers.

<11> The absorbent article according to item <10>, wherein the recesses and projections in Configuration (2) are formed in a direction extending at an angle relative to the lateral direction, and are preferably formed in a direction extending along the longitudinal direction.

<12> The absorbent article of item <10>, wherein the ratio of the area of the openings to the unit area in Configuration (3) is 5% or more and 25% or less, and preferably 10% or more and 20% or less.

<13> The absorbent article of claim 10, wherein, upon examination of a surface not facing the skin using an electron microscope, 70% or more of the fibers of all constituent fibers in the field of view upon examination are found to form an angle within ±30 degrees relative to the longitudinal direction in Configuration (4).

<14> The absorbent article of item <10>, wherein the proportion of the area of the embossed portion of the unit surface area not facing the skin is 5% or more and 25% or less, and preferably 10% or more and 20% or less, when here, the embossed part is formed by embossing in Configuration (5).

<15> The absorbent article of item <10>, wherein the area of the embossed portion on a unit surface area not facing the skin is 0.3 mm ² or more and 10 mm ² or less, and preferably 0.5 mm ² or more and 7 mm ² or less, wherein the embossed portion is formed by embossing in Configuration (5).

[0069]

<16> The absorbent article of item <10>, wherein the pore closing treatment in Configuration (6) includes heat treatment, ultrasonic treatment and coating treatment.

<17> The absorbent article of item <16>, in which the liquid used in the coating treatment is a liquid in which the volatile components present in the liquid are volatilized after coating and only the solid components remain on the sheet.

<18> The absorbent article of <17>, wherein the liquid contains a natural extract, an oil agent or a printing ink.

<19> The absorbent article of item <10>, wherein the emollient content of the sheet is 0.03 mass% or more and 10 mass% or less and preferably 0.1 mass% or more and 6 mass .%, or less in Configuration (7).

<20> The absorbent article according to item <10>, wherein the area density of the hollow fibers in the sheet is 5 g/ ^m2 or more and 20 g/ ^m2 or less, and preferably 8 g/ ^m2 or more and 15 g/ ^m2 or less in Configuration (8).

<21> The absorbent article of <10>, wherein the proportion of existing flat fibers on the non-skin facing surface is 60% or more and 100% or less, and preferably 70% or more and 100% or less in Configuration ( 9).

<22> The absorbent article of item <10>, wherein the content of infusible fibers is 0.1 mass% or more and 20 mass% or less, and preferably 0.5 mass% or more and 10.0 mass .% or less of the total weight of the sheet in Configuration (10).

<23> The absorbent article of <10>, wherein the non-fusible fibers include any one of natural fibers and cellulose fibers or both natural fibers and cellulose fibers, the natural fibers being fibers of one or two types of fibers, the first type being fibers are pulp fibers and the second type fibers are cotton fibers, and

Cellulose fibers are fibers of one or two or more types of hydrated cellulose fibers, lyocell fibers and Tencel fibers.

<24> The absorbent article of any one of <10> and <22> to <22>, wherein any one or two or more of an outer sheet, a cuff-forming sheet, a sheet member forming a skin-facing surface of the waist flap, and the top sheet are a through-air bonded nonwoven material and have any one or more of Configurations (8) - (10).

<25> The absorbent article according to any one of paragraphs <1> to <24>, wherein the receiving area includes an attachment member to which the fastening tape is attached, and

the thickness of the attachment member is 80% or less of the thickness of the outer sheet.

[0070]

<26> The absorbent article according to any one of paragraphs <1> to <25>, wherein the receiving area includes an attachment member to which the fastening tape is attached,

the attachment member has a low thickness zone in which the thickness is less than 50% of the maximum thickness of the attachment member, and

the area of the low thickness zone is 30% or more of the area of the attachment member.

<27> The absorbent article according to any one of paragraphs <1> to <26>, wherein the receiving area includes an attachment member to which a fastening tape is attached,

the attachment member has connected zones that are located at both ends of the attachment member defined in the longitudinal direction and which are attached to a surface of the outer sheet not facing the skin, and the length of each of the connected zones in the lateral direction is 80% or more of the full length of the attachment element, determined in the lateral direction.

<28> The absorbent article according to any one of <1> to <27>, wherein the area of the receiving zone is 30% or less of the area of the outer sheet.

<29> The absorbent article of <28>, wherein the area of the receiving zone is 3% or more and 30% or less, and preferably 5% or more and 25% or less of the area of the outer sheet.

<30> A package containing a plurality of absorbent articles according to any one of claims 1-29, which are placed in a packaging bag such that the receiving areas are not brought into contact with each other.

<31> The package of <30>, in which each of the absorbent articles is folded in half approximately at the center of the crotch portion along a line bisecting the full length in the longitudinal direction,

a plurality of folded absorbent articles are arranged adjacent to each other and placed in a packaging bag in a state in which they are compressed in the thickness direction, and

the absorbent articles adjacent to each other are in a state in which a surface of the front portion not facing the skin is in contact with a surface of the rear portion not facing the skin.

Examples

[0071]

The present utility model will be described below in more detail with reference to Examples. However, the scope of the present utility model is not limited to such Examples. Unless otherwise stated, "%" means "% by weight".

[0072]

[Example 1]

A through-bonded nonwoven fabric formed from constituent fibers consisting of multi-component polyethylene terephthalate and polyethylene fibers having a fineness of 1.3 dtex was prepared, and one surface of the nonwoven fabric was calendered to obtain a through-through air-bonded nonwoven fabric having flat fibers. . The outer sheet 5 having a receiving region R1 and a non-receiving region R2 was formed by attaching a member 6 for attaching to a given one surface of the nonwoven material using an adhesive (general purpose hot melt adhesive based on rubber). The amount of adhesive used was 20 g/m ² .

The attachment element 6 was a non-woven fabric bonded through air through and formed from constituent fibers consisting of multi-component fibers of polypropylene and polyethylene and having a fineness of 6.1 dtex. As the sheet forming the cuff, a nonwoven material with an SMS structure was used, formed from constituent fibers consisting of polypropylene, and having a spunbond surface layer with a fiber fineness of 1.8 dtex. The nonwoven fabric was embossed and softened using an emollient.

As a sheet forming the skin-facing surface of the waist flap WF, a nonwoven fabric with an SMS structure formed from constituent fibers consisting of polypropylene and having a spunbonded surface layer with a fiber fineness of 1.8 dtex was prepared. One surface of the nonwoven material was embossed and softened with an emollient.

A fastening tape 7 was prepared, in which the fastening part 71 was formed from polypropylene.

The diaper of the embodiment shown in FIG. 1 was manufactured using the outer sheet 5, the attachment member 6, the cuff forming sheet 16b, and the fastening tape 7 described above. The sheet forming the skin-facing surface of the waist flap WF was positioned to project laterally outward from the base end portion, which constitutes the base portion when lifting the cuff forming sheet 16b, and attached to the adjacent component member using an adhesive. As elements other than the sheet elements described above, the constituent elements (eg, the absorbent element) of commercially available and commercially available "Merries tape type S size" diapers (Merries tape type S size diapers) were used.

[0073]

[Example 2]

Component fibers consisting of multicomponent fibers of polyethylene terephthalate and polyethylene and having a fineness of 1.8 dtex were mixed with cotton fibers (5 wt.% by weight of the multicomponent fibers), which are infusible fibers, to combine the multicomponent fibers and cotton fibers into one , and thereafter, a through-air-bonded nonwoven fabric was obtained through through-air-through processing. A non-woven material bonded by air passing through was used as the outer sheet 5.

The attachment element 6 was a non-woven fabric bonded through air through and formed from constituent fibers consisting of multi-component fibers of polyethylene terephthalate and polyethylene and having a fineness of 4.4 dtex. For each of the cuff forming sheet 16b and the sheet forming the skin-facing surface of the waist flap WF, a nonwoven fabric with an SMS structure formed from constituent fibers consisting of polypropylene and having a spunbonded surface layer with a fiber fineness was used. component 1.4 dtex.

As the top sheet 2, a through-air bonded non-woven fabric formed from constituent fibers consisting of polyethylene terephthalate and polyethylene multi-component fibers and having a fineness of 3.1 dtex was used. The diaper 1 was manufactured in the same manner as in Example 1, except that the above components were used. The outer sheet 5 of the diaper 1 obtained in Example 2 had a non-skin surface containing cotton fibers.

[0074]

[Comparative example 1]

A through-bonded nonwoven fabric formed from constituent fibers consisting of multi-component polyethylene terephthalate and polyethylene fibers having a fineness of 3.0 dtex was prepared and used as the outer sheet 5.

As the attachment element 6, a nonwoven material with an SMS structure was used, formed from constituent fibers consisting of polypropylene, and having a spunbond surface layer with a fiber fineness of 1.8 dtex.

For each of the cuff-forming sheet 1b and the skin-facing surface of the waist flap WF, a nonwoven fabric with an SMS structure formed from constituent fibers consisting of polypropylene and having a spunbonded surface layer with a fiber fineness was used. component 1.8 dtex.

The topsheet 2 was a through-bonded non-woven fabric formed from constituent fibers consisting of multi-component fibers of polyethylene terephthalate and polyethylene and having a fineness of 4.5 dtex. The diaper was manufactured in the same manner as in Example 1, except that The above constituent elements were used.

[0075]

[Comparative example 2]

A through-bonded nonwoven fabric formed from constituent fibers consisting of polyethylene terephthalate and polyethylene multi-fibers having a fineness of 2.3 dtex was prepared and used as the outer sheet 5.

As the attachment element 6, a spunbond non-woven material formed from constituent fibers consisting of polypropylene and having a fineness of 3.2 dtex was used.

As the cuff forming sheet 16b, a nonwoven fabric with an SMS structure formed from constituent fibers consisting of polypropylene and having a spunbond surface layer with a fiber fineness of 2.0 dtex was used.

As the sheet forming the skin-facing surface of the waist flap WF, a spunbond nonwoven fabric formed from constituent fibers consisting of polypropylene and having a fineness of 2.7 dtex was used.

As the top sheet 2, a through-air bonded non-woven fabric formed from constituent fibers consisting of polyethylene terephthalate and polyethylene multi-component fibers and having a fineness of 4.4 dtex was used. The diaper was manufactured in the same way as in Example 1, except that the above components were used.

[0076]

For each of the diapers of the Examples and Comparative Examples, the average friction coefficient was determined for each/each of the receiving region R1 and the non-receiving region R2 of the outer sheet, the cuff forming sheet 16b, the skin-facing surface of the waist flap WF, and the top sheet. Measurements were performed in accordance with the method described above. In addition, the ratio of the average friction coefficients was obtained. The measurement results are shown in table. 1. In table. 1 M1 is the average friction coefficient in the receiving area R1, M2 is the average friction coefficient in the non-receiving area R2, M3 is the average friction coefficient of the cuff forming sheet 16b, M4 is the average friction coefficient on the skin-facing surface of the waist flap WF , and M5 represents the average friction coefficient of the top sheet.

[0077]

[Adhesive force between the fastening tape and the receiving area]

For each of the diapers of the Examples and Comparative Examples, the adhesion force between the fastening tape 7 and the receiving region R1 was evaluated by the following method. The fastening tape 7 was placed on the receiving area R1, and a roller weighing 1 kg was moved back and forth three times on the receiving area R1, whereby the fastening tape 7 was attached to the receiving area R1. Thereafter, the end edge of the fastening tape 7 was clamped and connected to a dynamometer (RX-20, manufactured by Aikoh Engineering Co., Ltd.). Thereafter, the dynamometer was pulled until the bonding strip 7 was separated from the receiving region R1 to measure the adhesive strength between the bonding tape 7 and the receiving region R1. The adhesive strength was then assessed according to the criteria below. When the adhesive strength is equal to or greater than 2.0 N, it can be determined that the adhesive force between the fastening tape and the attachment member is sufficient. The evaluation results are shown in table. 1.

A: Bond strength equal to or greater than 2.0 N.

Q: The adhesive strength is less than 2.0N.

[0078]

[Easy to remove the diaper from the packaging bag]

For each of the diapers in the Examples and Comparative Examples, the ease of removing the diaper from the packaging bag was evaluated using the following method (see FIG. 7). First, two diapers, folded in half approximately at the center of the crotch part C, were prepared in such a way that they were folded along a line dividing the full length in half in the longitudinal direction X. One diaper 1a was placed on a flat surface with the back part B facing downwards, and the end of this one diaper 1a, defined in the longitudinal direction X, was secured with adhesive tape. On this one diaper 1a, the other diaper 1b was placed so that the back portion B was facing downward, and the locations of the crotch portions C of the two diapers 1a and 1b were aligned/aligned. Thereafter, a weight 20 weighing 2 kg was placed on the receiving area R1 of another diaper 1b. Thus, the other diaper 1b was brought into contact with the diaper 1a and compressed by a load of 2 kg applied in the thickness direction, resulting in a pseudo-packing state in which the diapers were placed in a packaging bag (see FIG. 7). Thereafter, the crotch end C of the other diaper lb was clamped and connected to a dynamometer 21 (RX-20, manufactured by Aikoh Engineering Co., Ltd.). Thereafter, the dynamometer 21 was pulled in the horizontal direction to measure the maximum pullout resistance. The ease of removing the diapers from the packaging bag was then assessed according to the criteria below. When the maximum tear resistance is less than 10 N, since the resistance to removing the diapers from the packaging bag is low, it can be determined that the diapers are easy to remove. The evaluation results are shown in table. 1.

A: The maximum peel resistance is less than 10 N.

B: The maximum peel resistance is equal to or greater than 10 N.

[0079]

[0080]

As shown in table. 1, for each of the diapers of the Examples, the maximum tear resistance was less than 10 N in the pseudo-packing state, and the adhesive strength between the fastening tape and the receiving region was 2.0 N or more. From these results, it was clear that each of the diapers of the Examples could be easily removed from the packaging bag while guaranteeing the adhesive force between the fastening tape and the attachment member. In addition, in the case of each of the diapers of the Examples, the surface of the outer sheet not facing the skin felt smooth against the skin, the overall feel was uniform, and the texture was very good. In particular, the diaper of Example 1 was very good in light of the fact that the texture of both the non-skin surface and the skin-facing surface gave a uniform feel.

On the other hand, the diaper of Comparative Example 1 had a maximum tear resistance of 10 N or more in the pseudo-packing state, and in the case of the diaper of Comparative Example 2, the non-skin-facing surface of the outer sheet was felt to be non-uniform with respect to the skin, and the texture was not very good.

Industrial applicability

[0081]

In the case of the absorbent article of the present utility model, the adhesive strength of the fastening tape is guaranteed, the texture of the absorbent article is very good, and the absorbent article can be easily removed from the packaging bag.

Claims (29)

1. An absorbent article having a longitudinal direction corresponding to a direction from the front side to the back side of the carrier, and a lateral direction orthogonal to the longitudinal direction, wherein the absorbent product contains: a crotch portion placed on the crotch portion of the wearer; a front portion extending from the crotch portion toward the front side of the wearer; And a rear portion extending from the crotch portion toward the rear side of the wearer; wherein the absorbent product contains: fastening strips provided on both side edges of the rear portion along the longitudinal direction; And a receiving area provided in the front part and configured to be attached with fastening tapes, wherein the surface not facing the skin has a receiving zone and a zone other than the receiving zone, and the zone different from the receiving zone is formed from the outer sheet, a zone other than the receiving zone has an average coefficient of friction of 0.20 or less, the ratio of M1 to M2 (M1/M2) is 0.75 or more and 1.25 or less, wherein M1 is the average friction coefficient in the receiving zone, and M2 is the average friction coefficient in the zone other than the receiving zone, the receiving area includes an attachment member to which the fastening tape is attached, and the thickness of the attachment member is 80% or less of the thickness of the outer sheet. 2. The absorbent article of claim 1, further comprising an absorbent assembly including a liquid-retaining absorbent member and two anti-leak cuffs located along both sides of the absorbent assembly extending in the longitudinal direction, wherein Each anti-leak cuff includes: sheet forming a cuff; And an elastic element extending in the longitudinal direction and located in the area of the free end of the leakage cuff, and the ratio of M3 to M2 (M3/M2) is 0.75 or more and 1.25 or less, wherein M3 is the average coefficient of friction of the sheet forming the cuff, and M2 is the average coefficient of friction in a zone other than the receiving zone. 3. Absorbent product according to claim 1 or 2, additionally containing: liquid-retaining absorbent element; And waist flap portions that are located at the longitudinal ends of the front portion and the rear portion and that extend longitudinally outward or laterally outward from the peripheral edge of the absorbent member, wherein the ratio of M4 to M2 (M4/M2) is 0.75 or more and 1.25 or less, wherein M4 represents the average coefficient of friction on the skin-facing surface of the waist flap, and M2 represents the average coefficient of friction in a region other than the receiving region. 4. The absorbent article according to claim 1, further comprising a liquid-retaining absorbent element and a top sheet, which is located on the skin side of the surface of the absorbent element and which is in contact with the skin of the wearer in a wearing state, wherein the ratio of M5 to M2 (M5 /M2) is 0.75 or more and 1.25 or less, wherein M5 is the average friction coefficient of the top sheet, and M2 is the average friction coefficient in the area other than the receiving area. 5. The absorbent article according to claim 1, wherein the attachment member has a thin zone in which the thickness is less than 50% of the maximum thickness of the attachment member, and the area of the thin thickness zone is 30% or more of the area of the attachment member. 6. The absorbent article according to claim 1, wherein the attachment member has connected zones that are located at both longitudinal ends of the attachment member, and which are attached to a non-skin facing surface of the outer sheet, and a lateral length of each of the connected zones is 80% or more of the total length of the attachment element, in the lateral direction. 7. The absorbent article according to claim 1, wherein the area of the receiving zone is 30% or less of the area of the outer sheet.