JP2020092957A - Absorbent article - Google Patents

Abstract

To provide an absorbent article that improves a fit feeling and makes it easy to identify front and rear parts of the article.SOLUTION: An absorbent article 100 comprises side flaps 5, 6 and a mechanical fastener 64, where a ratio of rigidity of the side flaps 5, 6 obtained by a stiffness measurement test to rigidity of the mechanical fastener 64 obtained by a stiffness measurement test is 1:0.8 to 1:1.4, the rigidity of the side flaps 5, 6 obtained by the stiffness measurement test is equal to or higher than 1 gr/9 mm and equal to or lower than 4 gr/9 mm, and the rigidity of the mechanical fastener 64 obtained by the stiffness measurement test is equal to or higher than 1 gr/9 mm and equal to or lower than 3 gr/9 mm. The absorbent article has a side of a front bodice 2 and a side of a rear bodice 4 having approximately symmetrical shapes based on a center position in a longer direction. The absorbent article further comprises a fastening part 60 that includes the mechanical fastener 64, extends outward from an end in a width direction with respect to the side flaps 5, 6 at one of the front bodice 2 and the rear bodice 4, and includes at least a part having color differing from those of the side flaps 5, 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to an absorbent article having mechanical fasteners for fixing a front body and a back body.

Absorbent articles such as disposable diapers, urine pads and sanitary napkins are known. Among them, tape-type disposable diapers are known as absorbent articles. A tape-type disposable diaper is provided with a fastening tape on the front body or the back body. The fastening tape has a mechanical fastener, and the front body and the back body of the disposable diaper can be fixed to each other via the mechanical fastener. In Patent Document 1, a transparent area and an opaque area are provided on the fastening tape in order to facilitate confirmation of the position of the fastening tape.

JP, 2004-167025, A

One of the purposes of the present invention is to provide an absorbent article that improves the feeling of wearing and makes it easy to distinguish front and rear. It should be noted that the present invention is not limited to this purpose, and the actions and effects derived from each configuration shown in “Modes for Carrying Out the Invention”, which will be described later, can also be obtained by the conventional technique. It can be positioned for other purposes.

The absorbent article disclosed herein is a front body, a pair of left and right side flaps extending outward from both side edges in the longitudinal direction in the main body portion provided over the crotch part and the back body, and the front body. A mechanical fastener for fixing the rear body is provided, and the ratio of the rigidity obtained by the crush resistance measurement test of the side flap and the rigidity obtained by the crush resistance measurement test of the mechanical fastener is 1:0.8 to. 1:1.4, the rigidity obtained by the crush resistance measurement test of the side flaps is 1 gr/9 mm or more and 4 gr/9 mm or less, and the rigidity obtained by the crush resistance measurement test of the mechanical fastener is 1 gr/9 mm or more. It is 3 gr/9 mm or less, and the front body side and the back body side are substantially symmetrical with respect to the center position in the longitudinal direction. The absorbent article has the mechanical fastener, and extends outward from the end in the width direction with respect to the side flap on one of the front body and the back body, and at least a part of the color differs from the side flap. It has a fastening part.

According to the water-absorbent article shown in the present case, it is possible to provide an absorbent article that improves the feeling of wearing and facilitates front/rear distinction.

It is a plane view development view of the tape pattern diaper concerning an embodiment. It is a disassembled perspective view of the tape type paper diaper regarding embodiment. FIG. 3 is a sectional view taken along the line III-III in FIG. 1.

Hereinafter, modes for carrying out the present case will be described. The following embodiments are merely examples, and are not intended to exclude various modifications and application of techniques that are not explicitly shown in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the spirit thereof. Also,
They can be selected as needed and can be combined appropriately.

The absorbent article described in the embodiment is a sanitary article that is attached to a wearer and absorbs and retains the moisture of excrement such as urine and feces excreted from the wearer. This absorbent article includes an absorbent article such as a tape-type disposable diaper (so-called "disposable diaper"). In the following embodiments, a tape-type disposable diaper is exemplified as the absorbent article. The tape-type diaper has a front body and a back body separated before and after the waistline, unlike a pants-type paper diaper in which the waistline of the wearer is continuously formed in a circumferential shape. Tape-type disposable diapers are worn by various wearers such as infants as well as adults requiring care.

In the present embodiment, with respect to the disposable diaper, the direction connecting the front body, which is arranged to face the wearer's abdomen, and the back body, which is arranged to face the back, is the longitudinal direction. Inseam that is placed between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (center in the longitudinal direction) in the crotch of the wearer (placed opposite the crotch). The department is located. Further, in a state where the disposable diaper is worn by the wearer (hereinafter, abbreviated as "wearing state"), the side facing the wearer's skin (inside when worn) is the skin-facing surface side (skin surface side). , The side opposite to the skin facing surface side (outer side) is the skin non-facing surface side (non-skin surface side). Further, the direction connecting the skin facing surface side and the skin non-facing surface side is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, viewing from the skin facing surface side in the thickness direction is referred to as a plan view. The width direction in plan view is also called left and right.

In the present specification, for example, the notation of a numerical range of "1 to 100" includes both the lower limit value "1" and the upper limit value "100". The same applies to other numerical ranges.

[1. Constitution]
[1-1. Basic configuration]
The basic configuration of the tape-type disposable diaper 100 will be described with reference to FIGS. 1 to 3. Note that, in the cross-sectional view of FIG. 3, the thickness of each sheet is exaggerated in order to facilitate understanding of each configuration. In the following description, the "tape-shaped paper diaper" is simply referred to as "paper diaper".

In FIG. 1, the disposable diaper 100 is formed symmetrically with respect to the center line A in the width direction. The disposable diaper 100 is roughly divided into three regions of a front body 2, a crotch part 3, and a back body 4 along the longitudinal direction. The front body 2 is an area located on the lower abdomen side of the wearer when worn. The back body 4 is an area located on the buttocks side of the wearer when worn. The crotch part 3 is a region located between the front body 2 and the back body 4 and located at the crotch of the wearer when worn. The disposable diaper 100 includes a main body portion 1 provided over the front body 2, the crotch portion 3, and the back body 4.

The paper diaper 100 includes a pair of left and right front side flaps 5 and a pair of left and right rear side flaps 6 extending from both side edges in the longitudinal direction outward in the width direction from the crotch portion 3 in the front body 2 and the back body 4. I have each. Thus, the disposable diaper 100 has a shape in which the front body 2 side and the back body 4 side are substantially symmetrical with respect to the center position in the longitudinal direction. In other words, the overall shape of the disposable diaper 100 is line-symmetrical or substantially line-symmetrical with respect to the reference line CL extending in the width direction.

The paper diaper 100 includes a pair of left and right fastening portions 60 (“fastening tape”) provided so as to project outward from both side edges in the longitudinal direction on at least one of the front body 2 and the back body 4 (here, the back body 4). Or simply called "tape"). Further, the paper diaper 100 has the patch 38 to which the fastening portion 60 is fastened, on the other of the front body 2 and the back body 4 (here, the front body 2). The patch 38 is externally mounted (disposed on the non-skin surface side) on one of design portions 91 and 92 described later.

The disposable diaper 100 includes the laminated body 10 at least in the crotch portion 3. More specifically, the disposable diaper 100 includes a laminate 10 that is provided in the longitudinal direction across the front body 2, the crotch portion 3, and the back body 4. As shown in FIGS. 2 and 3, the laminated body 10 includes the absorbent body 20 and the top sheet 31 laminated on the skin-facing surface side of the absorbent body 20. Further, the laminated body 10 includes a back sheet 32 laminated on the skin non-opposing surface side of the absorber 20. A cover sheet 35 (non-skin side sheet) is laminated on the non-skin side surface side of the back sheet 32. In addition, the side sheet 33 (skin side sheet) is arranged from the side (outside in the width direction) of the top sheet 31 to the skin facing surface side. As shown in FIG. 3, the absorbent body 20 includes an absorbent core 21. Further, as shown in FIGS. 1 and 2, the paper diaper 100 is provided with a front design portion 91 (second design portion) of the front body 2 and a rear design portion 92 (first design portion) of the back body 4. ing. These design portions 91 and 92 are provided so that they can be viewed from the skin facing surface side.
Hereinafter, each component of the disposable diaper 100 will be described.

[Absorptive core]
The absorbent core 21 is a mat-shaped member that absorbs and holds liquid. As shown in FIG. 3, the absorbent core 21 includes a super absorbent polymer (also called SAP (Superabsorbent polymer), a super absorbent polymer or a super absorbent resin) 22 and a fiber material 23. .. The absorbent core 21 is formed by mixing the super absorbent polymer 22 with the fiber material 23. The fiber material 23 is formed by entwining ultrafine fibers having hydrophilicity. The superabsorbent polymer 22 is usually embedded in and held in the fiber material 23 by being mixed with the fiber material 23. The superabsorbent polymer 22 can absorb and retain the liquid diffused by the fibrous material 23.

<Super absorbent polymer>
As the superabsorbent polymer 22, various known ones used as a material for an absorbent body in an absorbent article such as a disposable diaper or a urine pad can be used. Examples of the superabsorbent polymer 22 include starch-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, starch-ethyl acrylate graft copolymer saponified products, and the like; Cellulose such as a crosslinked product of carboxymethyl cellulose; a synthetic polymer based such as polyacrylic acid (salt), polyethylene oxide crosslinked with acrylic acid, and a crosslinked product of a polyvinyl alcohol-maleic anhydride reaction product can be used. Among these, polyacrylic acid (salt) is preferable and sodium polyacrylate is more preferable from the viewpoint of absorbability. These may be used alone or in combination of two or more. Although the shape of the superabsorbent polymer 22 is not particularly limited, for example, a granular shape, a powder shape, a pellet shape, a sol shape, a film shape, a fibrous shape or the like can be used.

<Fiber material>
Examples of the fibrous material 23 include cellulosic fibers such as pulp fibers, rayon fibers, and cotton fibers; and synthetic fibers such as polyethylene, polypropylene, and polyethylene terephthalate that have been hydrophilized. Above all, from the viewpoint of absorbability, it is preferable to use fluff pulp obtained by crushing or defibrating fibers or synthetic fibers. These may be used alone or in combination of two or more.

〔Absorber〕
The absorber 20 is a mat-shaped (or pad-shaped) member having a liquid absorbing property that absorbs and retains liquid water such as urine and menstrual blood excreted from the wearer (hereinafter referred to as “excreted water”). As shown in FIG. 1, the present embodiment exemplifies an hourglass-shaped absorber 20 in which a portion located in the crotch portion 3 has a smaller widthwise dimension than portions located in the front body 2 and the back body 4. More specifically, this absorber 20 has an asymmetric hourglass in which the longitudinal dimension of the portion of the back body 4 having a large widthwise dimension is larger than the longitudinal dimension of the portion of the front body 2 having a large widthwise dimension. It has a shape. However, the shape of the absorbent body 20 in plan view is not limited to the hourglass shape as described above, and may be a rectangle in plan view (that is, the widthwise dimension is constant), or a circular front body 2 and back body 4 respectively. It may be a dumbbell shape that connects the two.

As shown in FIG. 3, the absorbent body 20 has an absorbent core 21 and a core wrap sheet (hereinafter abbreviated as “wrap sheet”) 24. The absorbent body 20 is formed by wrapping the absorbent core 21 with a wrap sheet 24. The wrap sheet 24 covers the entire absorbent core 21, including the skin facing surface side and the skin non-facing surface side of the absorbent core 21.

<Wrap sheet>
The wrap sheet 24 is a sheet-shaped member that covers the absorbent core 21. Encapsulating the absorbent core 21 with the wrap sheet 24 ensures the regularity of the absorbent core 21.

The wrap sheet 24 can be formed of a known material used for absorbent articles. For example, paper such as tissue paper; spunbonded nonwoven fabric, needle punched nonwoven fabric, spunlace nonwoven fabric, air-through nonwoven fabric, SMS (Spunbound Meltblown Spunbound) nonwoven fabric and the like can be used.

[Laminate]
The laminated body 10 is a laminated structure in which a top sheet 31 and a back sheet 32 are arranged on both main surface sides of the absorber 20, respectively. Above all, the top sheet 31 is arranged on the surface of the absorber 20 that faces the skin. Further, the back sheet 32 is arranged on the surface of the absorber 20 on the side not facing the skin. In the laminated body 10, the excreted water from the skin facing surface side is transmitted to the top sheet 31, the permeated excreted water is absorbed and held by the absorber 20, and the back sheet 32 leaks to the outside from the skin non-facing surface side. Prevent. The top sheet 31, the back sheet 32, and the absorber 20 can be fixed to each other by a known adhesive such as a hot melt adhesive.

<Top sheet>
The top sheet 31 is a sheet-shaped member that is arranged closest to the skin-facing surface side in the laminated body 10. The top sheet 31 has a widthwise dimension larger than that of the absorber 20, and covers the entire surface of the absorber 20 from the skin-facing surface side. Further, the top sheet 31 is in contact with the skin of the wearer in the state where the disposable diaper 100 is worn, and allows the absorbent body 20 to absorb the excreted moisture. Therefore, the top sheet 31 is composed of a material having water permeability at least partially or entirely. Further, the top sheet 31 is preferably made of a material having high flexibility in order to have a fit property when mounted. Further, in order to suppress stuffiness in the mounted state, it is preferable to be made of a material having air permeability.

As a material for forming the top sheet 31, for example, woven cloth, non-woven cloth, porous film, or the like can be used. Alternatively, as the top sheet 31, fibers made of thermoplastic resin such as polypropylene, polyethylene, polyester, nylon and the like may be hydrophilized to make a non-woven fabric. As the non-woven fabric forming the top sheet 31, for example, a spun bond non-woven fabric, a needle punch non-woven fabric, a spun lace non-woven fabric, an air-through non-woven fabric, a melt blown non-woven fabric, an SMS non-woven fabric or the like can be used.

<Back sheet>
The backsheet 32 is a sheet-shaped member that is arranged closest to the skin non-opposing surface side of the laminated body 10. The back sheet 32 has a larger widthwise dimension than the absorber 20 and the top sheet 31, and covers the entire surfaces of the absorber 20 and the top sheet 31 from the skin non-facing surface side. Further, the back sheet 32 prevents excrement from leaking from the absorber 20 to the non-skin-facing surface side. Therefore, the back sheet 32 is made of a material that is impermeable to water. Further, the back sheet 32 is preferably made of a material having moisture permeability in order to suppress stuffiness in the mounted state.

As a material forming the back sheet 32, for example, a thermoplastic resin sheet such as polyethylene or polypropylene can be used. Above all, as the back sheet 32, it is preferable to use a microporous thermoplastic resin sheet in which a plurality of fine holes of 0.1 to 0.4 μm are formed. As such a sheet, for example, a sheet obtained by kneading an inorganic filler in a thermoplastic resin to form a sheet and then stretching the sheet can be used.

[Side sheet, cover sheet]
The disposable diaper 100 further includes a side sheet 33 and a cover sheet 35 that are laminated on the laminated body 10. The side sheet 33 is arranged from the lateral direction side of the laminated body 10 to the skin facing surface side. Further, the cover sheet 35 is arranged on the non-skin-facing surface side of the laminated body 10. The side sheet 33, the cover sheet 35, and the laminated body 10 can be fixed with a known adhesive such as a hot melt adhesive.

<Side sheet>
The side sheets 33 are a pair of left and right members provided on both sides in the width direction to form three-dimensional gathers 42 described below on both sides of the laminated body 10. As shown in FIG. 2, the side seat 33 includes a flap portion 34A and a flap portion 34B that extend outward in the width direction from both side edge portions in the longitudinal direction of the front body 2 and the back body 4 rather than the crotch portion 3, respectively. Have As shown in FIG. 3, the side sheets 33 are provided on the lateral sides of the top sheet 31 and the back sheet 32, respectively. Further, the side sheet 33 is laminated on the skin facing surface side from the width direction side of the top sheet 31 and the back sheet 32 to the width direction side portion. The side sheet 33 is erected in the direction of contacting the wearer's skin by utilizing the contraction of the three-dimensional gather 42 described later.

The side sheet 33 is preferably made of a water impermeable material in order to prevent liquid leakage to the lateral side. As the side sheet 33, spunbonded nonwoven fabric can be used. In addition, a part of the side sheet 33 is arranged on the most skin-facing surface side in the diaper 100 (for this reason, the side sheet 33 is also referred to as a “top sheet” similarly to the top sheet 31). As the side sheet 33 which can contact the wearer in this manner, a spunbonded non-woven fabric having enhanced flexibility by including a melt blown layer such as SMS non-woven fabric and SMMS (Spunbound Meltblown Meltblown Spunbound) non-woven fabric is used. Is preferred. Alternatively, it is preferable to use a spunbonded nonwoven fabric whose flexibility is improved by suppressing the fineness and weight of the fibers forming the spunbonded nonwoven fabric.

The "fineness" is a parameter corresponding to the fiber diameter (thickness) and the cross-sectional area of the fiber, and is represented by the weight per predetermined length. For example, the number of grams per 10,000 m (decitex) of one fiber is used as the “fineness”.
Further, the "area weight" is a parameter corresponding to the thickness of the sheet or the degree of lamination, and is represented by the weight per unit area. For example, the number of grams per square meter is used as the "area weight."

The top sheet 31 and the side sheet 33 have substantially the same color on their entire surfaces. The color of the top sheet 31 and the side sheet 33 is usually white. Thus, the main body 1 including the side flaps 5 and 6 has substantially the same color (first color) over the entire area when viewed in plan from the skin facing surface side.

<Cover sheet>
The cover sheet 35 is a sheet-shaped member that covers the laminated body 10 and the design portions 91 and 92 attached to the skin non-facing surface side of the laminated body 10 from the skin non-facing surface side. The cover sheet 35 is used to reinforce the back sheet 32 and to improve the feel (feel) of the back sheet 32 by arranging the cover sheet 35 on the most side of the diaper 100 excluding the patch 38 and not facing the skin. Be done. The width of the cover sheet 35 is set to be larger than that of the absorber 20, the top sheet 31, and the back sheet 32, and the cover sheet 35 is arranged around the wearer's crotch, buttocks, waist, abdomen, and the like in a worn state. As shown in FIG. 2, the cover sheet 35 includes a pair of left and right flap portions 36A and left and right flap portions that extend outward in the width direction from both side edges in the longitudinal direction of the front body 2 and the back body 4 than the crotch portion 3. Each has a pair of flap portions 36B.

Examples of the material forming the cover sheet 35 include woven cloth and non-woven cloth. Above all, it is preferable to use a nonwoven fabric or a wet fabric of a thermoplastic resin such as polyethylene, polypropylene or polyester. In particular, a spunbonded nonwoven fabric can be preferably used as the cover sheet 35 from the viewpoint of flexibility in order to secure the feel (touch).

The cover sheet 35 is usually a translucent sheet. Specifically, the cover sheet 35 has a total light transmittance of preferably 65% or more, more preferably 75% or more, preferably 99% or less, more preferably 90% or less. When the total light transmittance of the cover sheet 35 is equal to or more than the above lower limit value, the design portions 91 and 92 are easily visible through the cover sheet 35 from the non-opposing surface side of the diaper 100. Further, when the total light transmittance of the cover sheet 35 is equal to or less than the above upper limit value, the back sheet 32 and the design portions 91 and 92 are likely to be protected from contact with other members or rubbing.

In the present specification, the "total light transmittance" is measured by a measuring method according to JIS K 7361-1 (Plastic-Test method for total light transmittance of transparent material-Part 1: Single beam method). Shall mean a value. The total light transmittance depends on the selection of the material forming the cover sheet 35 (for example, when the cover sheet 35 is a non-woven fabric, the fineness and weight of the non-woven fabric, or the content of a filler such as titanium oxide) or the cover sheet 35. It can be adjusted by the thickness dimension and the like.

In the disposable diaper 100 configured as described above, the side sheet 33, the top sheet 31, the absorber 20, the back sheet 32, and the cover sheet 35 are laminated in this order from the skin facing surface side to the skin non-facing surface side. Has been done. The side sheet 33 and the cover sheet 35 are attached to each other by a known adhesive such as a hot melt adhesive. The front side flap 5 is formed by the flap portion 34A and the flap portion 36A. Further, the rear side flap 6 is formed by the flap portion 34B and the flap portion 36B.

The main body 1 (see FIG. 1) of the disposable diaper 100 extends from the absorber 20 to the front body 2, such as the sheets 31 to 33 and the flap portions 34A, 34B, 36A and 36B, the crotch 3, and the back body 4. It has a basic member that is provided. Note that the patch 38, the fastening portion 60, and the design portions 91 and 92 have an additional configuration (not a basic member) and are not included in the main body portion 1.

〔gather〕
The paper diaper 100 is provided with gathers 40 such as leg gathers 41, three-dimensional gathers 42, and waist gathers 43 in order to improve the followability to the wearer in the worn state. The gather 40 is made by sandwiching a stretchable member (stretchable member) such as rubber, polyurethane, or a stretchable film in a stretched state between sheets such as a nonwoven fabric, and fixing it by hot melt, heat sealing, ultrasonic welding or the like. It is composed of a stretchable sheet composite. In this sheet composite body, the sheet has fine wrinkles due to the force (restoring force, elastic force) of the elastic member to return from the stretched state to the original state (state of natural length). Here, a thread-shaped rubber member (hereinafter, abbreviated as “thread rubber”) 50 is exemplified as the elastic member.

In this paper diaper 100, three types of gathers 41, 42, 43 to which elasticity is imparted by three types of thread rubbers 51, 52, 53 are exemplified as gathers 40 formed of the thread rubber 50. One is the leg gather 41 in which the widthwise outer edge portion of the back sheet 32, the side sheet 33, and the cover sheet 35 are wrinkled with the first thread rubber 51. The other is the three-dimensional gather 42 in which the widthwise inner edge of the side sheet 33 is wrinkled with the second thread rubber 52. The other is the waist gather 43 in which the longitudinal back edge portions of the top sheet 31, the back sheet 32, the side sheet 33, and the cover sheet 35 are wrinkled with the third thread rubber 53.

The leg gathers 41 are provided to increase the followability of the wearer's legs and suppress the gap between the leg gathers 41 and the disposable diaper 100. As shown in FIG. 1, the leg gathers 41 are provided at positions that are the periphery of the legs of the wearer in the mounted state. As shown in FIGS. 1 and 2, in the leg gathers 41, the first thread rubbers 51 are provided in the crotch portion 3 and the periphery thereof along the longitudinal direction, which is the outer edge in the width direction of the back sheet 32. ing. Further, as shown in FIG. 3, the first thread rubber 51 is interposed between the side sheet 33 and the cover sheet 35.

The three-dimensional gather 42 is provided to prevent leakage of excrement laterally in the width direction by improving the followability to the wearer at the periphery of the excretion site. As shown in FIG. 1, the three-dimensional gather 42 is arranged inside the side seat 33 in the width direction. As shown in FIGS. 1 and 2, in the three-dimensional gather 42, the second thread rubber 52 is provided along the longitudinal direction at the widthwise inner edge of the side seat 33. Further, as shown in FIG. 3, in the three-dimensional gather 42, the sheet portions 33A and 33B located at the widthwise inner end edge portions of the side seats 33 are folded and overlapped. The second thread rubber 52 extending in the longitudinal direction is surrounded by these sheet portions 33A and 33B.

The waist gathers 43 are provided in order to improve followability to the buttocks and lower abdomen of the wearer. Specifically, in the waist gather 43, a stretchable sheet 54 in which a plurality of third thread rubbers 53 extending in the width direction are stretched and sandwiched between a pair of non-stretchable sheets is used. As shown in FIGS. 1 and 2, the elastic sheet 54 is interposed between the top sheet 31 and the cover sheet 35 at the longitudinal back edge portion.

[1-2. Detailed configuration]
Next, the detailed configuration of the disposable diaper 100 will be described.

[Design Department]
The design portions 91 and 92 are areas that can be visually distinguished from other portions of the diaper 100. The design units 91 and 92 have, for example, characters, figures, symbols, patterns, or a combination thereof (hereinafter, these are collectively referred to simply as “design”). The design parts 91 and 92 have the same design or at least a part of the same design. The design parts 91 and 92 have substantially the same contour shape. By providing the design parts 91 and 92 in the disposable diaper 100, it is possible to make the wearer of the disposable diaper 100 or the user who wears the disposable diaper 100 interested, entertain, or please.

The design units 91 and 92 can be formed by printing a desired color ink by a printing method such as letterpress printing, gravure printing, flexo printing, offset printing, screen printing, inkjet printing, or the like. The ink may be water-based or oil-based, but an oil-based ink is usually used. The ink contains a known dye or pigment as a coloring material, a solvent, a surfactant, and the like.

The appearances of the design parts 91 and 92 of the present embodiment are the same or similar to each other. The "design parts 91 and 92 having the same or similar appearances" as used herein includes at least one of modes 1 to 4 listed below.
Aspect 1: Design portions 91, 92 having the same or similar colors or patterns
Aspect 2: Design portions 91 and 92 having the same or similar pattern arrangement
Aspect 3: Design portions 91 and 92 having the same or substantially the same width dimension
Aspect 4: Design portions 91 and 92 having the same or substantially the same longitudinal dimension
For example, the design portions 91 and 92 that are line-symmetrical or substantially line-symmetrical in the longitudinal direction are provided.

〔patch〕
The patch 38 constitutes a fastening mechanism that realizes a fastening function together with the fastening portion 60, and is a member to which the fastening portion 60 can be attached. The fastening portion 60 and the patch 38 form a fastening mechanism. As the fastening mechanism, for example, a planar fastener (mechanical fastener) having at least a hook member (male member) and mechanically coupled by the hook member and the loop member (female member) can be used. The hook member is a sheet-shaped member having a large number of hook-shaped, mushroom-shaped, anchor-shaped, or other protrusions formed on its surface. The loop member is a sheet-shaped member using a non-woven fabric having loop-shaped fibers arranged on the surface or composed of short fibers. Alternatively, an adhesive or an adhesive tape can be used as the fastening mechanism. Among them, the sheet fastener is preferable because the hook member and the loop member can be firmly fixed to each other and they can be peeled off and repeatedly used. In this embodiment, the case where the fastening portion 60 functions as a hook member and the patch 38 functions as a loop member is illustrated.

In this embodiment, a front patch (hereinafter abbreviated as “patch”) 38 is attached to the outer surface of the front body 2 (the most non-skin-facing surface side of the diaper 100) in the cover sheet 35. That is, the patch 38 is mounted on the design unit 91. As the patch 38, for example, a non-woven fabric using fibers of thermoplastic resin such as polypropylene, polyethylene, polyester and nylon is used.

The patch 38 is transparent or semi-transparent, or integrally forms the external appearance of the front design portion 91, by having light transparency. For example, the patch 38 has the same design as the design units 91 and 92, or at least a part of the same design. As a result, the visibility and appearance of the front design portion 91 with the exterior of the patch 38 hardly deteriorate. The “light transmissivity” of the patch 38 is a property of transmitting light to the front design portion 91 at the position where the patch 38 is mounted and transmitting the reflected light reflected by the design portion 91 to a visually recognizable degree. Is.

The light transmittance of the patch 38 can be represented by the total light transmittance. The patch 38 has a total light transmittance of preferably 65% or more, more preferably 70% or more, still more preferably 75% or more, preferably 99% or less, more preferably 95% or less, further preferably 90%. It is below. When the total light transmittance of the patch 38 is equal to or more than the above lower limit value, the design portions 91 and 92 are easily visible through the patch 38 from the non-opposing surface side of the diaper 100. Further, when the total light transmittance of the patch 38 is equal to or less than the upper limit value, the engagement force between the patch 38 and the fastening portion 60 is likely to be exhibited. The total light transmittance of the patch 38 can be adjusted by selecting the material forming the patch 38, the thickness dimension of the patch 38, and the like.

When a non-woven fabric is used as the material for forming the patch 38 that satisfies the total light transmittance in the above range, its fiber diameter is preferably 0.5 to 1.2 dtex, and its basis weight is preferably 16 g/m ² or less. Here, as for the fiber diameter, the patch 38 is divided into approximately 5 equal parts in the width direction, 1 cm square test pieces are sampled from each of the approximately 5 equal parts, and the fiber diameter is measured at each 20 points with a microscope. However, it can be calculated from the average value. Further, the basis weight can be calculated by arbitrarily collecting five test pieces of 20 cm in length×20 cm in width from the patch 38, measuring the mass, and converting the average value into the weight per unit area.

<Overlapping part>
As shown in FIG. 1, the patch 38 has an overlapping portion 38A (main portion) with the design portion 91. If the width dimension of the patch 38 is larger than the width dimension of the design portion 91, the patch 38 may have a non-overlap portion 38B that does not overlap the design portion 91 on the outer side in the width direction of the overlap portion 38A. is there.

In the patch 38 mounted on the design unit 91, the total light transmittance of the overlapping portion 38A is similar to the range of the total light transmittance of the patch 38 described above. In the patch 38 in which the total light transmittance of the overlapping portion 38A is in the above range, at least the overlapping portion 38A is transparent or semitransparent. When the patch 38 having the total light transmittance of the overlapping portion 38A within the above range is used, even if the patch 38 is mounted on the design portion 91, the appearance of the design portion 91 is not easily affected by the presence of the patch 38, and the design portion 91 is visually recognized. Excellent in appearance and appearance. As a result, the user's willingness to purchase the disposable diaper 100 can be increased.

[Fitting part]
The fastening portion 60 constitutes a fastening mechanism together with the patch 38 and has a hook member that can be attached to the patch 38. The fastening portion 60 is attached to at least one of the front side flap 5 and the rear side flap 6 so as to project (extend) outward (outward) from the end portion in the width direction. In this embodiment, the case where the rear side flap 6 is provided with the fastening portion 60 will be exemplified. When the paper diaper 100 is bent toward the skin-facing surface so that the front body 2 and the back body 4 face each other with the crotch portion 3 as the center, the fastening portion 60 is pulled outward in the width direction and fastened to the patch 38. Can be worn. Then, in this state, the disposable diaper 100 is attached to the wearer.

As shown in FIGS. 1 and 2, the fastening portion 60 has a base material sheet 61 (hook carrier) that is fixed to the rear side flap 6 and extends outward from the rear side flap 6. ing. The base sheet 61 and the rear side flap 6 are fixed to each other by, for example, heat-sealing or ultrasonic-sealing the side sheet 33 and/or the cover sheet 35, or by an adhesive such as hot melt. It can be performed by adhering to the cover sheet 35. Further, on one main surface of the base material sheet 61, a locking member 64 which is a hook member for fixing the front body 2 and the back body 4 is provided. The locking member 64 of this embodiment is composed of mechanical fasteners. The base sheet 61 can connect the main body 1 and the locking member 64 in the width direction, and can fasten the front body 2 and the back body 4 via the locking member 64 and the patch 38.

The base material sheet 61 and/or the locking member 64 have a color (color, second color) different from that of the main body 1 when viewed in a plan view from the skin facing surface side. It is sufficient that at least one of the base sheet 61 and the locking member 64 has a color different from that of the main body 1, and both the base sheet 61 and the locking member 64 have a color different from that of the main body 1. May be. Above all, it is preferable that the base sheet 61 and the locking member 64 have different colors. Specifically, it is preferable that the base material sheet 61 has a color similar to that of the main body 1 (first similar color), and the locking member 64 has a color different from that of the main body 1. Particularly, with respect to the main body 1 having substantially the same color when viewed in a plan view from the skin facing surface side, the base material sheet 61 has a color similar to that of the main body 1 and the locking member 64. Preferably has a color different from that of the main body 1. On the contrary, the base sheet 61 may have a color different from that of the main body 1, and the locking member 64 may have the same color as that of the main body 1. From these, the fastening portion 60 and the body portion 1 can be distinguished from each other by the base sheet 61 and the locking member 64 of a color different from the color of the body portion 1, and the base sheet included in the fastening portion 60. It is possible to distinguish 61 from the locking member 64. Therefore, when the disposable diaper 100 is attached, the position of the locking member 64 can be quickly grasped, and the fastening to the patch 38 can be performed smoothly.

Here, the “different color” means that at least one of brightness, hue, and saturation is different. For example, not only those having different hues, but those having the same hue but different saturation or lightness are “different colors”. The “similar colors” mean similar colors including substantially the same color, that is, colors having the same or similar hues. The “substantially the same color” means colors of the same system including substantially the same color, that is, colors having the same or similar hues. That is, it means that the brightness, the hue, and the saturation are all substantially the same. In other words, “substantially the same color” means that the contrasting colors can be visually recognized under the sunlight or normal illumination light even if the contrasting colors are not completely the same. Having a difficult degree of identity.

For example, the color difference between any two points is measured by using a commercially available colorimeter, and is quantified based on the CIE1976 (L ^* a ^* b ^* ) color space defined in JIS Z 8729 or the like. Can be determined by comparing Specifically, the difference in L ^* values between two points to be measured (for example, two arbitrary points on the skin-facing surface side) is ΔL ^* , the difference in a ^* values is Δa ^* , and the difference in b ^* values is Δb ^*. , The color difference ΔE ^* ab=[(ΔL ^* ) ² +(Δa ^* ) ² +(Δb ^* ) ² ] ^1/2 . When the color difference ΔE ^* ab is preferably 1.5 or more, more preferably 3.0 or more, it can be said that the colors are different to the extent that the user can visually perceive. In other words, “different color” means that the color difference is within the above range. The "similar color" means that the color difference is preferably less than 1.5, and the "substantially the same color" means that the color difference is preferably less than 1.0.

In order for the base sheet 61 and/or the locking member 64 to have a color different from that of the main body 1, a known coloring method can be used. For example, the base material sheet 61 and/or the locking member 64 can be colored with a coloring agent by a known means such as painting, printing, and dyeing. Alternatively, the colored base material sheet 61 and/or the locking member 64 can be obtained by mixing the raw material of the base material sheet 61 and/or the locking member 64 with a colorant and manufacturing the raw material with the colorant mixed. Obtainable. The colorant is not particularly limited, and known pigments, dyes and the like can be used. The color of the colorant is not limited, and any color different from that of the main body 1 can be used as appropriate. Since the main body 1 is usually white, the color of the colorant is preferably other than white.

<Base material sheet>
The base sheet 61 has a widthwise inner base portion 62 (sandwiched portion) and a protruding portion 63 (extension portion) protruding (extending) outward in the width direction from the base portion 62. The base portion 62 is fixed to the rear side flap 6 by being sandwiched between the flap portion 34B and the flap portion 36B. The protruding portion 63 is provided so as to protrude outward in the width direction with respect to the side sheet 33 and the cover sheet 35 and be exposed to the outside. A locking member 64 is provided on the skin-facing surface side of the protruding portion 63.
When the base material sheet 61 having a color different from the color of the main body 1 is used, at least the protrusion 63 may have a color different from the color of the main body 1. The base portion 62 may be a color different from the color of the main body portion 1 (the entire base sheet 61 is different from the color of the main body portion 1 ), or may be substantially the same color as the main body portion 1. The colors may be similar colors. When only the protruding portion 63 has a color different from the color of the main body portion 1, the coloring cost of the base material sheet 61 can be reduced.

As a material for forming the base sheet 61, for example, woven cloth, non-woven cloth, resin film, paper or the like can be used. As the material forming the woven cloth, the non-woven cloth, or the resin film, for example, a thermoplastic resin such as polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride, or polystyrene can be used.

Furthermore, the base material sheet 61 has a predetermined translucency. The "predetermined translucency" as used herein means a property that the color of the locking member 64 can be seen through when viewed from the side opposite to the side on which the locking member 64 is laminated with respect to the base material sheet 61. To do. For example, when the fastening portion 60 is viewed from the skin non-opposing surface side in a state where the paper diaper 100 is developed in a planar shape, or when it is overlapped with the base portion 62 of the base sheet 61 on the skin surface side from this developed state. When the fastening portion 60 is viewed from the skin facing surface side with the protruding portion 63 folded, the color of the locking member 64 can be seen through the base material sheet 61.
As described above, the predetermined translucency can be achieved by providing a filmed portion on at least a part of the base material sheet 61. For example, the base sheet 61 using a light-transmitting film as at least a part thereof has a predetermined light-transmitting property.

<Locking member>
The locking member 64 is a hook member for forming a planar fastener with the patch 38. The locking member 64 has a sheet-shaped support and a large number of protrusions that project substantially vertically from the support. The locking member 64 is fixed to the base sheet 61 on the surface of the support on the side where the protrusion is not provided. Further, the locking member 64 is fixed to the patch 38 via the protrusion. The locking member 64 may be formed, for example, by separately forming the support and the protrusion, but the support and the protrusion are preferably formed integrally by simultaneous molding.

The shape of the protrusion of the locking member 64 is not particularly limited, and examples thereof include a mushroom shape, a hook shape, and an anchor shape. Since the protrusion has such a shape, the engagement of the locking member 64 with the patch 38 can be favorably performed, and the engagement can be easily released. The locking member 64 having such a shape can be manufactured, for example, by the method described in JP-A-8-508910.

The material forming the locking member 64 is not particularly limited as long as it satisfies the rigidity described later, and a known material used for a hook member for forming the planar fastener can be appropriately used. For example, thermoplastic resins such as polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate and polystyrene can be used. These may be used alone or in combination of two or more. Among these, a propylene homopolymer or a copolymer of ethylene and propylene is preferable, and a copolymer of ethylene and propylene is more preferable. As a result, the locking member 64 can easily exhibit the desired rigidity.

In the locking member 64, the thickness of the support is usually 0.02 mm or more, preferably 0.03 mm or more, more preferably 0.04 mm or more, and usually 0.10 mm or less, preferably 0.08 mm or less. It is preferably 0.07 mm or less. The height of the protrusion is usually 0.1 mm or more, preferably 0.15 mm or more, more preferably 0.2 mm or more, and usually 0.5 mm or less, preferably 0.4 mm or less, more preferably 0. It is 0.3 mm or less. When the thickness of the support and the height of the protrusion are within the above ranges, the locking member 64 easily exhibits desired rigidity.

〔rigidity〕
In the paper diaper 100, the fastening portion 60 is configured as a soft member. More specifically, the fastening portion 60 has the same degree of rigidity as the side flaps 6. More specifically, the locking member 64 has the same degree of rigidity as the side flap 6 made of nonwoven fabric. As a result, for example, a feeling of strangeness given to the wearer due to the rigidity of the locking member 64 is reduced, and the wearing feeling of the locking member 64 is improved. The rigidity of the side flaps 6 refers to the value of the portion composed of the side sheet 33 and the cover sheet 35. In other words, it means the value of the portion where the back sheet 32, the waist gather 43, the third thread rubber 53, etc. are not provided.

The rigidity evaluates the performance of crush resistance (stiffness) of the side flap 6 or the locking member 64. In this specification, the rigidity means a value obtained by a crush resistance measurement test. In the crush resistance measurement test, the side flap 6 or the locking member 64 having a width of 9 mm and a length of 90 to 180 mm is used as a measurement sample, and one end and the other end in the longitudinal direction of the measurement sample are bonded to form a loop, and the loop shape is measured. It can be performed by applying a load to the test piece (gr/9 mm). The crush resistance measurement test can be carried out, for example, using a loop steph Nestesta (manufactured by Toyo Seiki).

The rigidity relationship between the locking member 64 and the side flap 6 can be expressed by the ratio of the rigidity of the side flap 6 and the rigidity of the locking member 64. The locking member 64 having the same degree of rigidity as the side flaps 6 means that the ratio of the rigidity of the side flaps 6 and the locking member 64 is 1:0.8 to 1:1.4. There is something. That is, the ratio of the rigidity of the side flaps 6 to the rigidity of the locking member 64 is usually 1:0.8 or more, preferably 1:0.9 or more, more preferably 1:1.0 or more, and usually 1 or more. : 1.4 or less, preferably 1:1.3 or less, more preferably 1:1.2 or less. When the rigidity ratio of the side flap 6 and the locking member 64 is within the above range, the locking member 64 and the side flap 6 tend to have the same degree of rigidity. As a result, the engaging members 64 and the side flaps 6 have the same touch, and it is difficult to distinguish them by touch.

The side flap 6 has a rigidity of usually 1 gr/9 mm or more, preferably 1.5 gr/9 mm or more, more preferably 2 gr/9 mm or more, usually 4 gr/9 mm or less, preferably 3.5 gr/9 mm or less, more preferably 3 gr/9 mm or less. It is 9 mm or less. When the rigidity of the side flaps 6 exceeds the lower limit of the above range, the strength of the side flaps 6 increases, and it is easy to prevent damage. When the rigidity of the side flaps 6 is less than the upper limit of the above range, the softness of the side flaps 6 is improved, and the wearing feeling is likely to be improved.

The rigidity of the locking member 64 is usually 1 gr/9 mm or more, preferably 1.3 gr/9 mm or more, more preferably 1.5 gr/9 mm or more, usually 3 gr/9 mm or less, preferably 2.7 gr/9 mm or less, more preferably Is 2.5 gr/9 mm or less. When the rigidity of the locking member 64 exceeds the lower limit of the above range, the engaging force of the locking member 64 with the patch 38 is likely to be exerted. When the rigidity of the locking member 64 is below the upper limit of the above range, the softness of the locking member 64 is improved, and the wearing feeling is likely to be improved.

[2. Action and effect]
Since the disposable diaper 100 of the present embodiment is configured as described above, the following actions and effects can be obtained.

2. Description of the Related Art Conventionally, tape-type disposable diapers are known that use sheet fasteners as a fastening mechanism for fixing the front body and the back body. This planar fastener has a hook member as a locking member and can be firmly fixed to the patch, and is preferably used because it can be peeled off and used repeatedly. However, since the hook member is usually more rigid than the other parts of the paper diaper, when the fitting member is worn, the locking member part becomes stiff or gives a tingling stimulus, which affects the touch, The wearer sometimes felt uncomfortable. Therefore, there has been a demand for a paper diaper having a soft locking member.

By the way, the conventional high-rigidity locking member has been used to determine the position of the locking member by tactile sensation by utilizing the fact that it has higher rigidity than other parts of the paper diaper, especially the side flaps. Further, by determining the position of the locking member, it is possible to distinguish the front and back of the diaper based on the position of the locking member. In such a situation, in a paper diaper in which the rigidity of the locking member and the rigidity of the side flaps are made similar by using a soft locking member, the discomfort given to the wearer can be reduced, but the locking member by tactile sensation is used. It has become difficult to distinguish the position of and the front and rear of the diaper.

In the disposable diaper 100, the locking member 64 has the same degree of rigidity as the side flaps 6. As a result, since the locking member 64 and the side flaps 6 have the same degree of softness, it is possible to reduce the discomfort that the wearer of the disposable diaper 100 has and improve the wearing comfort. Further, in the disposable diaper 100, the base sheet 61 and/or the locking member 64 have a color different from that of the main body 1. Accordingly, a person who sees the disposable diaper 100 pays attention to the fact that the color of the base sheet 61 and/or the locking member 64 is different from that of the main body portion 1, and visually confirms that the fastening portion 60 is not touched. The position can be determined. Then, the user can distinguish the front and rear of the diaper 100 from the position of the fastening portion 60. Therefore, according to the disposable diaper 100, the wearing feeling can be improved and the front and rear can be easily distinguished. Therefore, convenience at the time of mounting is increased.

The disposable diaper 100 has a shape in which the front body 2 side and the back body 4 side are substantially symmetrical with respect to the center position in the longitudinal direction. Such a paper diaper 100 is folded into the front body 2 side and the back body 4 side when the paper diaper 100 is bent toward the skin-facing surface side so that the front body 2 and the back body 4 face each other with the crotch 3 as the center. The shapes of match. For this reason, it is easy to align the position when mounting the disposable diaper 100, and the appearance is well-balanced. However, with the disposable diaper 100, it is difficult to visually distinguish the front and rear from the shape.

The main body 1 of the disposable diaper 100 has substantially the same color when viewed in plan from the skin facing surface side. In such a paper diaper 100, when excrement or the like adheres to the skin-facing surface side during use, it is easy to distinguish the portion where the excrement or the like adheres to the skin-facing surface side of the paper diaper 100 from the other portion. It has become. However, in the disposable diaper 100, it is difficult to distinguish the front and the rear from the color by visual inspection from the skin facing surface side.

Further, the design portions 91 and 92 on the front body 2 and the back body 4 on the side not facing the skin have the same or similar appearance. In such a paper diaper 100, the patterns of the front body 2 and the back body 4 on the non-skin facing surface side have a uniform feeling or continuity, and are aesthetically excellent. However, in the disposable diaper 100, it is difficult to distinguish the front and back from the designs of the design parts 91 and 92 by visual inspection from the non-skin facing surface side.

Further, the patch 38 is transparent or translucent, or integrally forms the outer appearance of the front design portion 91. In such a paper diaper 100, the appearance of the front design portion 91 is not easily affected by the presence of the patch 38, and the visibility and appearance of the front design portion 91 are excellent. However, in the disposable diaper 100, it is difficult to determine the position of the patch 38 that is mounted on the front design portion 91, and it is difficult to distinguish the front and back from the position of the patch 38 by visual inspection from the side not facing the skin. .

As described above, the paper diaper 100 has a configuration that makes it difficult to distinguish the front and the back, but since the base sheet 61 and/or the locking member 64 has a color different from that of the main body 1, The user can visually determine the position of the fastening portion 60 to distinguish the front and the rear of the diaper 100.

In addition, the base material sheet 61 has a property that the color of the locking member 64 can be seen through when viewed from the side opposite to the side on which the locking member 64 is laminated with respect to the base material sheet 61. Therefore, when the locking member 64 having a color different from that of the main body 1 is used, the position of the fastening portion 60 can be determined by the color of the locking member 64 seen through the base material sheet 61. For example, when the paper diaper 100 is flatly developed and viewed from the non-skin facing surface side, the protruding portion 63 is folded back so that the base 62 of the base material sheet 61 is superposed on the skin surface side from this developed state. When the fastening portion 60 is viewed from the skin facing surface side in this state, it is possible to determine the position of the color-locking locking member 64 through the base material sheet 61. Therefore, the front and rear of the disposable diaper 100 can be distinguished.

[3. Other]
In the above description, the case where the patch 38 is attached to the front body 2 and the fastening portion 60 is provided on the rear side flap 6 has been described as an example. The patch 38 may be attached to the rear body 4, and the fastening portion 60 may be provided on the front side flap 5. Even in this case, the user can visually determine the position of the fastening portion 60 provided on the front side flap 5 to distinguish the front and the rear of the diaper 100.

In the above description, the case where the design parts 91 and 92 are printed on the back sheet 32 has been described as an example. The design parts 91 and 92 may be provided in a part visible from the outside of the diaper 100. Therefore, the design parts 91 and 92 may be printed on the cover sheet 35, or may be printed on both the back sheet 32 and the cover sheet 35. Alternatively, the design parts 91 and 92 may be separately provided between the back sheet 32 and the cover sheet 35.

Hereinafter, the present invention will be specifically described with reference to examples. The materials, usage amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the present invention is not limited to the following examples.

[Evaluation method]
Physical properties of the locking members (that is, "mechanical fasteners") obtained from the following experimental examples and comparative experimental examples were evaluated according to the following evaluation methods and evaluation criteria.

<Rigidity evaluation>
The locking member obtained in each experimental example and comparative experimental example was cut into a width of 9 mm and a length of 150 mm to obtain a measurement sample for measuring rigidity. Furthermore, the one end and the other end of this measurement sample in the longitudinal direction were bonded to form a loop, and a load was applied to this loop-shaped test piece to obtain rigidity. The evaluation of rigidity was performed by using a loop Stefne tester (manufactured by Toyo Seiki Co., Ltd.). This evaluation was performed 5 times by changing the measurement sample, and the average value of the values of 3 times excluding the maximum value and the minimum value was obtained as the rigidity.
In addition, as a reference example, a test member obtained by stacking two white non-woven fabrics (spun-bonded non-woven fabrics) was cut into a width of 9 mm and a length of 150 mm, and the rigidity was evaluated using this as a measurement sample. The rigidity of this reference example corresponds to the rigidity of the side flaps.
From the evaluation value of the rigidity of the locking member obtained in each of the experimental examples and the comparative experimental example, and the evaluation value of the rigidity of the reference example, the evaluation value of the rigidity of the reference example and the rigidity of each experimental example or comparative experimental example The ratio with the evaluation value of was calculated.

<Evaluation of softness>
A sensory test was conducted to evaluate the softness of the locking member obtained in each of the experimental examples and the comparative experimental example.
Ten examinees each of the locking members obtained in each of the experimental examples and the comparative experimental example, and the test member of the reference example, the difference in the feel of the member when touched by the hand, the following four stages. It was evaluated according to the standard.
◎ (Excellent): No difference in softness is felt ○ (Good): Softness is felt to the same degree △ (Fair): Slight difference in softness is felt × (No): Difference is felt in softness

<Visual evaluation>
A sensory test was conducted in order to evaluate the visual color of the locking members obtained in each experimental example and comparative experimental example.
Ten test subjects evaluated the difference in color of the visual member between the locking member obtained in each of the experimental examples and the comparative experimental example and the test member of the reference example based on the following two-stage criteria. did.
◎ (Excellent): Different colors can be distinguished × (Not possible): Colors are the same and cannot be distinguished

[Experimental Example 1]
50 parts by weight of polyethylene resin (melt index (MI) 1.0, HDPE having a melting point of 124° C.), 50 parts by weight of polypropylene resin (melt flow rate (MFR) 2.5, isotactic polypropylene having a melting point of 160° C.) Was used) and 1 part by mass of a colorant (pigment or dye) were kneaded to obtain a resin composition. Using this resin composition, a locking member of Experimental Example 1 having a mushroom-shaped protrusion and a support was prepared by the method described in the experimental example of JP-A-8-508910. At this time, it was prepared so that the rigidity of the locking member would be about 2.0 which is the target value. The locking member of Experimental Example 1 is light blue.
The obtained locking member was evaluated. The evaluation results are shown in Table 1.

[Experimental Examples 2 to 4, Comparative Experimental Examples 1 to 6]
In the locking member of Experimental Example 1, Experimental Examples 2 to 4 and Comparative Experimental Example were performed in the same manner as in Experimental Example 1 except that the rigidity of the locking member was changed to the rigidity target value shown in Table 1. The locking members 1 to 6 were obtained.
The obtained locking member was evaluated. The evaluation results are shown in Table 1.

〔Consideration〕
As shown in Table 1, the locking members of Comparative Experimental Examples 1 to 6 are different in softness from the test members of the reference example corresponding to the side flaps, and the wearer may feel a sense of discomfort during wearing. there were.
On the other hand, the locking members of Experimental Examples 1 to 4 have the same or similar softness to the test member, and it is difficult to distinguish them by the tactile sense, and the wearing feeling is good. It was profitable. Furthermore, the locking members of Experimental Examples 1 to 4 had a color different from that of the test member, and could be visually distinguished.

100 Paper diapers 1 Main body 2 Front body 3 Inseam 4 Rear body 5 Front side flaps 6 Rear side flaps 10 Laminated body 20 Absorbent body 21 Absorbent core 22 Super absorbent polymer 23 Fiber material 24 Wrap sheet 31 Top sheet 32 Back sheet 33 Side sheet 35 Cover sheet 38 Patch (front patch)
40 gather 50 rubber thread (stretchable member)
60 fastening part 61 base material sheet 64 locking member (mechanical fastener)
91,92 Design Department

Claims (7)

A pair of left and right side flaps extending outward from both side edge portions in the longitudinal direction in the main body portion provided over the front body, crotch and back body, and for fixing the front body and the back body A mechanical fastener, the ratio of the rigidity obtained by the crush resistance measurement test of the side flap and the rigidity obtained by the crush resistance measurement test of the mechanical fastener is 1:0.8 to 1:1.4, The rigidity obtained by the crush resistance measurement test of the side flaps is 1 gr/9 mm or more and 4 gr/9 mm or less, the rigidity obtained by the crush resistance measurement test of the mechanical fastener is 1 gr/9 mm or more, 3 gr/9 mm or less, and the longitudinal Based on the central position of the direction, the front body side and the back body side is an absorbent article having a substantially symmetrical shape,
The mechanical fastener is provided, and one of the front body and the back body is provided with a fastening portion that extends outward from the end in the width direction with respect to the side flap, and at least a portion of which has a color different from that of the side flap. Absorbent articles. An absorbent article whose overall shape is line-symmetrical or substantially line-symmetrical with respect to a reference line extending in the width direction,
The main body portion has substantially the same first color over the entire area,
The absorbent article according to claim 1, wherein at least a part of the fastening portion has a second color different from the first color. The fastening portion has a base material sheet that connects the mechanical fastener and the main body portion in the width direction, the mechanical fastener is laminated on the base material sheet, and the base material sheet is the second color. Item 3. The absorbent article according to item 2. The main body is
Having a skin side sheet on the skin side and a non-skin side sheet on the non-skin side, the skin side sheet and the non-skin side sheet are laminated,
The fastening portion is
It has a sandwiching portion sandwiched between the skin side sheet and the non-skin surface side sheet on the inner side in the width direction, and an extending portion extending from the side flap, and is similar to the first color. And having a base sheet of a first similar color of a color different from the second color,
The mechanical fastener is the second color,
The base material sheet has a predetermined translucency that allows the second color of the mechanical fasteners to be seen through when viewed from the side opposite to the side where the mechanical fasteners are laminated with respect to the base material sheet. 2. The absorbent article according to 2. The absorbent article according to claim 4, wherein the base sheet has a filmed portion. One of the front body and the back body is provided so as to be visible from the non-skin surface side, and the other of the front body and the back body is provided so as to be visible from the non-skin surface side. The absorbent article according to any one of claims 1 to 4, further comprising: a design part, wherein the first design part and the second design part have the same or similar appearances to each other. It is arranged on the non-skin surface side with respect to the second design part, and is transparent or translucent, or has a main part that integrally constitutes the appearance of the second design part with the second design part, The absorbent article according to claim 6, further comprising a patch arranged on the most non-skin surface side and to which the fastening portion is fixed.

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