JP3222798B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper using, as a fastening member, a stretchable cloth excellent in feel and texture.

[0002]

2. Description of the Related Art
As this kind of stretchable fabric used as a fastening member of a disposable diaper, a film-like sheet made of a thermoplastic elastomer such as a urethane-based elastomer or a styrene-based elastomer, or a non-woven fabric formed of fibers made of the thermoplastic elastomer is used. Are known.

However, a fastening member for a disposable diaper formed from these materials has a touch and skin irritation characteristic of rubber and has a poor drape property, so that it is suitable as a fastening member for a diaper. I couldn't say it.

Accordingly, it is an object of the present invention to provide a disposable diaper having a fastening member formed of a stretchable fabric having an excellent touch and feel.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a specific permanent set and a specific 100% strain comprising a specific stretchable sheet and a specific stretchable fabric.
It has been found that the above object is achieved by using a stretchable fabric having a% elongation stress as a fastening member for a disposable diaper.

The present invention has been made based on the above findings, and includes a liquid-permeable top sheet, a liquid-impermeable back sheet,
And a disposable diaper including a liquid-retaining absorbent interposed between the top sheet and the back sheet, and having a ventral part located on the abdominal side of the wearer and a dorsal part located on the dorsal side when worn. A fastening member for holding and fixing the dorsal portion and the abdominal portion when worn is provided on both left and right side edges of the dorsal portion, and the fastening member has at least a part thereof. An extensible fabric is bonded to at least one surface of a sheet made of an elastic elastomer, and has a permanent set of 30% or less and a 100% elongation stress of 100 g / 25.
mm or more stretchable fabric , the stretchable fabric,
The stretchable fabric is arranged so as to face the topsheet side.
It is, the fastening member is a male member of a mechanical fastener
Alternatively , the above object has been achieved by providing a disposable diaper characterized by having a female member (hereinafter referred to as the disposable diaper of the first invention).

The present invention also provides a liquid-permeable topsheet,
A liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the top sheet and the back sheet, and are located on the abdominal part and the back side of the wearer when worn. In a disposable diaper having a back side, fastening members for holding and fixing the back side and the abdomen at the time of wearing are provided on left and right side edges of the back side. The member is formed by joining a pleated fabric to at least one surface of a sheet made of an elastomer having at least a part thereof and having a permanent set of 30% or less and 10% or less.
0% elongation stress is made elastic cloth over 100 g / 25 mm, the stretch fabric is the folds Tagged fabric
It is arranged so as to face the top sheet side, and the fastening
The member provides a disposable diaper characterized by comprising a male member or a female member of a mechanical fastener (hereinafter, the disposable diaper of the second invention is referred to as the disposable diaper). is there.

The present invention also provides a liquid-permeable topsheet,
A liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the top sheet and the back sheet, and are located on the abdominal part and the back side of the wearer when worn. In a disposable diaper having a back side, fastening members for holding and fixing the back side and the abdomen at the time of wearing are provided on left and right side edges of the back side. The member has at least a part thereof made of an elastomer having elasticity, and a fiber web is entangled and laminated on at least one side of a sheet having openings.
0% or less and 100% elongation stress is made elastic cloth over 100 g / 25 mm, the stretch fabric, the fiber
The web is arranged so that it faces the top sheet.
Ri, the fastening member is a male member or main mechanical fasteners
The present invention provides a disposable diaper characterized by comprising a disposable diaper (hereinafter referred to as the disposable diaper of the third invention).

Further, the present invention provides a liquid-permeable topsheet,
A liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the top sheet and the back sheet, and are located on the abdominal part and the back side of the wearer when worn. In a disposable diaper having a back side, fastening members for holding and fixing the back side and the abdomen at the time of wearing are provided on left and right side edges of the back side. The member is formed by non-uniformly stretching a laminated sheet in which a nonwoven fabric is laminated on at least one surface of a sheet made of an elastomer having at least a part thereof, and has a permanent set of 30% or less and a 100% elongation stress. 100g / 25
mm or more stretchable fabric , the stretchable fabric,
The laminated sheet is arranged so as to face the top sheet side.
And, the fastening member is also male member of a mechanical fastener
Is a disposable diaper characterized by having a female member (hereinafter, when referred to as a disposable diaper of the fourth invention,
This disposable diaper) is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the disposable diaper according to the first invention will be described below with reference to the drawings. Here, FIG. 1 is a schematic sectional view showing the structure of a first embodiment of a stretchable fabric used as a material for a fastening member in the disposable diaper of the first invention.

In the stretchable fabric 1 of the embodiment shown in FIG. 1, an extensible fabric 3 is laminated on one surface of a sheet made of a stretchable elastomer (hereinafter, this sheet is referred to as an “elastomer sheet”) 2 (see FIG. 1). (Laminated). Hereinafter, the elastomer sheet 2 and the extensible fabric 3 constituting the stretchable fabric 1 will be described.

The elastomer sheet 2 is made of an elastic elastomer. As the elastomer, conventionally known elastomers can be used without any particular limitation. Examples thereof include natural rubber; isoprene rubber;
1,2-polybutadiene; styrene-butadiene rubber;
Chloroprene rubber; Nitrile rubber; Butyl rubber; Ethylene-propylene rubber; Urethane rubber; And copolymers. In particular, as the elastomer, an ethylene-α-olefin copolymer obtained by using a metallocene (cyclopentadienyl complex) as a catalyst (hereinafter referred to as “ethylene-α-olefin copolymer” means this copolymer) Is preferred from the viewpoints of processability of the elastomer sheet 2, adhesion between the elastomer sheet 2 and the stretchable fabric 3, and low irritation of the stretchable fabric 1 to the skin.

In the above ethylene-α-olefin copolymer, the α-olefin to be copolymerized with ethylene is an α-olefin having 3 to 30 carbon atoms, for example, propylene, 1-butene, 1- Examples thereof include pentene, 1-hexene, 1-octene, 1-heptene, 4-methylpentene-1, 4-methylhexene-1, 4,4-dimethylpentene-1, and 1-octadecene.
Among them, 1-hexene, 1-octene, 1-heptene and 4-methylpentene-1 are preferably used.

Examples of the cyclopentadienyl complex used as a catalyst in copolymerizing ethylene and the α-olefin include JP-A-4-253711, JP-A-4-279592, and JP-A-6-259592. 503585
JP, JP-A-3-188092, JP-A-61-1
130314, JP-A-60-35006,
JP-A-58-19309, JP-A-60-3500
No. 8, JP-A-3-1630088, European Patent No. 277,004, and International Publication WO92
Those usually used in the polymerization of olefins described in JP / 017723 and the like can be used without any particular limitation. In the copolymerization, a co-catalyst usually used together with the above cyclopentadienyl complex can be used in an ordinary amount.

The mixing ratio of ethylene and α-olefin in the ethylene-α-olefin copolymer is preferably from 40 to 98% by weight of ethylene, and preferably from 60 to 2% by weight of α-olefin.

The ethylene-α-olefin copolymer is prepared by, for example, reacting ethylene with an α-olefin in the presence of a cyclopentadienyl complex, preferably from 100 to 3,
000 kg / cm ² , more preferably 300 to 2,000
Under a pressure of 0 kg / cm ² , preferably 125 to 25
It can be produced by polymerizing at a temperature of 0 ° C., more preferably at a temperature of 150 to 200 ° C. by a high pressure ionic polymerization method.

The above ethylene-α-olefin copolymer has a melt flow rate (MFR: JIS K
Measured at 190 ° C. under a load of 2.16 kg according to 7210) is preferably 0.01 to 300 g / 10 min, more preferably 0.1 to 150 g / 10 min, and more preferably 0.5 to 30 g / min. Particularly preferred is 10 minutes. Further, the ethylene-α-olefin copolymer,
Preferably it has a density of 0.90 g / cm ³ or less, and still more preferably from 0.880~0.860g / cm ^3.

The above-mentioned ethylene-α-olefin copolymer preferably has a permanent set of 0 to 30%.
More preferably, it is -20%. Most preferably, the permanent set is 0%. The method for measuring the permanent strain will be described later. Further, the ethylene-α-olefin copolymer preferably has a hysteresis ratio of 1.0 to 5.0, and more preferably 1.0 to 3.0. If the permanent strain is out of the above range or the hysteresis ratio is out of the above range, the fit of the obtained stretchable fabric 1 may be reduced.

The above-mentioned elastomer sheet 2 is preferably in the form of a sheet or a non-woven fabric sheet. When the elastomer sheet 2 is a film-like sheet, the film-like sheet can be produced by melt molding using a known film forming means, for example, a T-die or an inflation die, or cast molding. Further, a foamed sheet can be used as the film-like sheet. on the other hand,
When the elastomer sheet 2 is a nonwoven fabric sheet, the nonwoven fabric sheet can be manufactured by a known nonwoven fabric forming means, for example, a melt blown method, a spun bond method, or the like.

The basis weight of the elastomer sheet 2 is not particularly limited, but the basis weight as a general range is 10 to 10.
100 g / m ² , preferably 10 to 60 g / m ²
m ² is more preferable. The above grammage is 10 g / m
^If it is less than ² , the 100% elongation stress required as a fastening member of the disposable diaper may be insufficient, and the fitting property may not be provided. If it exceeds 100 g / m ² , the cost may increase, and The 100% elongation stress as a member may be too high, and the waist of the wearer may be tightly tightened.

The elastomer sheet 2 has elasticity as described above. The elastomer sheet 2 is
The permanent set at the time of 00% elongation is preferably 0 to 30%,
More preferably, it is 0 to 20% from the viewpoint that when the above-mentioned stretchable fabric is used as a fastening member of a disposable diaper, it can follow the movement of the human body without causing destruction. In addition, the above-mentioned permanent strain was measured for a sample (length: 150 mm).
× width 25 mm) was fixed to a tensile tester with an initial length of 100 mm, then the sample was stretched 100% at a speed of 300 mm / min, and the length of the sample after releasing the stretch (length after stretching) ) Was measured and calculated by the following equation. Permanent strain (%) = [(length after elongation−initial length) / initial length] × 100

Next, the fabric 3 in the stretchable fabric 1 of the embodiment shown in FIG. 1 used as a material of the fastening member of the disposable diaper of the first invention will be described. The cloth 3
Consists of various fiber materials, such as woven and non-woven fabrics and knits,
Those having extensibility, good texture and feel, and easy to laminate with the elastomer sheet 2 are used. In particular, it is preferable to use a non-woven fabric as the cloth, since extensibility can be easily expressed.

As an example of a preferable nonwoven fabric, a nonwoven fabric which has substantially no bonding point between constituent fibers and is integrated by entanglement of constituent fibers (hereinafter, this nonwoven fabric is referred to as "nonwoven fabric A") Is mentioned. Since the nonwoven fabric A maintains its form as a nonwoven fabric due to the entanglement of the constituent fibers, the entanglement point easily moves when a mechanical external force is applied, so that the nonwoven fabric A can be deformed, that is, expanded. Examples of the nonwoven fabric A include a spunlace nonwoven fabric and a needle-punched nonwoven fabric, and it is particularly preferable to use a spunlace nonwoven fabric from the viewpoint of texture and productivity.

Further, as another preferred example of the nonwoven fabric, a nonwoven fabric having a large number of bonding points formed by fusion between constituent fibers and having a constituent fiber length larger than the distance between adjacent bonding points. Hereinafter, this nonwoven fabric is referred to as “nonwoven fabric B”). The non-woven fabric B is formed into a sheet having a large number of bonding points by fusing constituent fibers by a method such as heat fusion. Specifically, for example, (a) the constituent fibers are crimped and the crimp can be stretched between the bonding points, so that a nonwoven fabric that can be stretched as a whole nonwoven fabric, and (b) a nonwoven fabric are formed. The fibers have many arrangements (orientations) in a certain direction, and are non-woven fabrics that are rigid in the direction of the arrangement (orientation), but are easily deformed in the direction perpendicular thereto. (C)
By combining the above two methods, a nonwoven fabric whose structure is easily deformed can be suitably used. In particular, spunbonded nonwoven fabrics (long-fiber nonwoven fabrics) and heat-rolled nonwoven fabrics (short-fiber nonwoven fabrics) are nonwoven fabrics formed into sheets by providing fusion bonding points, respectively. It is. Particularly, as the nonwoven fabric B, JP-A-5-59655 and JP-A-7-276573.
It is preferable to use those described in Japanese Patent Application Laid-Open Publication No. H10-26095.

As the fibers constituting the non-woven fabric (non-woven fabric A and non-woven fabric B), either long fiber continuous filaments or short fiber staple fibers can be used depending on the method of producing the non-woven fabric. As the fibers, fibers made of various thermoplastic resins, for example, polyethylene (PE),
One or more fibers made of polypropylene (PP), polyester, polyamide, etc., and fibers made of these thermoplastic resins and natural fibers (cotton, rayon, etc.)
Can be used. When the fiber is a fiber made of a thermoplastic resin, various types of composite fibers composed of a low melting point component and a high melting point component, for example, a core-sheath type composite fiber or a side-by-side type composite fiber may be used. Can also. The thickness of the fiber is preferably as thin as possible from the viewpoint of the extensibility, flexibility and texture of the nonwoven fabric, and particularly preferably 3 denier or less. Although the lower limit of the thickness is not particularly limited, it is up to about 0.1 denier in actual production.

The thickness of the cloth 3 is not particularly limited, but is preferably 0.1 to 1 mm under a load of 0.5 g / cm ² , from the viewpoint of cost and feeling, etc. More preferably, it is 0.8 mm. Similarly, the basis weight of the cloth 3 is not particularly limited, but is preferably 15 to 50 g / m ² , and more preferably 15 to 40 g / m ² from the viewpoint of cost and the like.

When a knit is used as the cloth 3,
For example, the materials disclosed in JP-A-62-184103 can be suitably used.

The above-mentioned cloth 3 only needs to have such an extensibility that it does not break when the above-mentioned stretchable cloth 1 is stretched. Specifically, the breaking elongation is preferably 50 to 500.
%, And more preferably 100 to 250%.
The elongation at break was measured for a sample (length: 150 mm × width 25).
mm) was fixed to a tensile tester at an initial length of 100 mm, and then the sample was stretched at a speed of 300 mm / min to measure the length when the sample was broken (length at break). Calculated. Elongation at break (%) = [(length at break−initial length) / initial length] × 100

In the stretchable fabric 1 of the embodiment shown in FIG. 1, the inter-fiber space of the fabric 3 (that is, the fabric 3
It is preferable that the elastomer constituting the elastomer sheet 2 does not substantially exist in the voids formed by the fibers constituting the elastomer sheet 2 (that is, the elastomer does not enter the voids between the fibers). In the stretchable fabric 1 having such a structure, the texture and flexibility of the cloth of the fabric 3 are impaired, so that the texture and flexibility of the stretchable fabric 1 as a whole are preferably improved. A method for producing the stretchable fabric 1 having such a structure will be described later.

The stretchable fabric 1 of the embodiment shown in FIG. 1 is obtained by laminating the above-mentioned elastomer sheet 2 and the above-mentioned fabric 3. There is no particular limitation on the lamination method. For example, when the elastomer sheet 2 is a film-like sheet, when the elastomer sheet 2 is melt-extruded into a sheet shape, the elastomer sheet 2 may be formed on the fabric 3 previously manufactured. The above-mentioned stretchable fabric 1 can be manufactured by melt lamination. As another manufacturing method, there is a method of laminating the elastomer sheet 2 and the fabric 3 by thermocompression lamination or frame lamination, or lamination using a hot melt adhesive or a liquid adhesive. Prior to lamination, the laminating surface of each of the elastomer sheet 2 and the fabric 3 may be subjected to corona treatment or frame treatment to further improve the adhesion between them. In particular, in order that the elastomer constituting the elastomer sheet 2 does not substantially exist in the inter-fiber voids of the cloth 3, it is preferable that both are point-bonded. Examples of the point joining method include point joining by embossing and point joining by an adhesive.

In particular, the elastomer sheet 2 and the cloth
The fabric 3 is intermittent along the stretching direction of the stretchable fabric 1.
Fixed by a large number of fixing parts formed in
Preferably, they are joined. With such fixation,
It is preferable because the elastic properties of the elastic fabric 1 are not easily hindered.
New In this case, the elastic cloth 1
Fixed (particularly point-joined) parts may be regular
Preferably, the interval between the portions is determined by the bonding strength of the stretchable fabric 1.
(Adhesive strength), elastic properties, and drapability
It is preferably from 1.0 to 10 mm, more preferably from 1.0 to 5.
More preferably, it is 0 mm. In addition, fixed
The area of each of the joined parts is the above-mentioned stretchable fabric.
0.1 to 3.0 mm from the viewpoint of rigidity and elastic properties of 1.^Twoso
Preferably, 0.1 to 2.0 mm ^TwoBeing
Is more preferred. In addition, fixed (especially point bonding)
The total area of the parts is determined by the rigidity and elastic properties of the elastic cloth 1.
From the viewpoint, it is 1 to 30% of the area of the elastic fabric 1.
Is more preferable, and it is more preferable that it is 1 to 20%.

In particular, it is preferable that the above point joining is performed by embossing. That is, the stretchable fabric 1 has a large number of point-joined fixed portions formed by compressing and joining the elastomer sheet 2 and the fabric 3 by embossing, and the elastomer sheet 2 and the fabric 3 are substantially formed. It is preferable to have a non-compressed portion that is not joined to the elastic fabric 1 from the viewpoint of improving the feel and flexibility of the stretchable fabric 1.

The size of the joining point formed by the above point joining varies depending on the shape and the like. For example, in the case of a dot shape (dot shape), the size is 0.1 to 20.0 mm.
It is preferably from ^2, more preferably in the range of 0.1 to 10.0 mm ^2, most preferably a 0.1 to 2.0 mm ^2. The size of the junction is less than 0.1 mm ^2, the bonding strength is low, facilitating separation of the layers of the stretch fabric by stretching, when it exceeds 20.0 mm ^2, the extensible regions of the nonwoven fabric Because it will be fixed
It is not preferable because the stretchability of the stretchable fabric can be prevented.

In the stretchable fabric 1 of the embodiment shown in FIG. 1, the 100% elongation stress is 100 g / 25 mm or more, preferably 200 g / 25 mm or more, and more preferably 300 g / 25 mm or more. . If the elongation stress is less than 100 g / 25 mm, the stress is low and it is difficult to provide fit for use as a fastening member for a diaper. There is no particular limitation on the upper limit of the elongation stress, and a higher value is more preferable. The elongation stress was determined by fixing a sample (length: 150 mm x width 25 mm) to a tensile tester at an initial length of 100 mm, and then setting the sample at 30 mm.
This is the value of stress when elongating 100% at a speed of 0 mm / min.

In the stretchable fabric 1 of the embodiment shown in FIG. 1, the permanent strain in the stretchable direction is 30% or less. If the permanent set exceeds 30%, the fit will decrease. The permanent set is preferably 20% or less.
The lower limit of the permanent strain is not particularly limited, and is most preferably 0%. The method for measuring the permanent strain is the same as the method for measuring the permanent strain in the elastomer sheet 2.

The stretchable fabric has a peeling force after the widening test of preferably 50 g / 25 mm or more, more preferably 70 g / 25 mm or more.
Most preferably, it is 25 g / 25 mm or more. If the peeling force is less than 50 g / 25 mm, the fabric and the elastomer sheet are easily peeled off when the stretchable fabric is stretched and shrunk, which is not preferable.

Here, the peeling force after the above-mentioned widening test is measured as follows. That is, first, the stretchable fabric is cut into a rectangular shape having a width of 25 mm and a length of 150 mm to obtain a sample sheet. Here, the “width” direction is a direction along the longitudinal direction of the stretchable fabric, and the “length” direction is a direction along the lateral direction (stretch direction) of the stretchable fabric ( The same applies to the description of other measurement methods). Next, the obtained sample sheet is stretched and recovered by 200% in the length direction, and then the lamination strength is measured, and the value is defined as the peeling force. The conditions for the above-mentioned extension recovery are as follows: "Tensilon RTA"
-100 "(manufactured by Orientec), the distance between the chucks was 100 mm, the pulling speed was 300 mm / min, and the return speed was 300 mm / min. In addition, the measurement conditions of the above-mentioned Lami strength are as follows: “Tensilon RTA-10”
0 ”(made by Orientec Co., Ltd.) and the distance between chucks is 3
0mm, pulling speed 300mm / min, return speed 300
mm / min, the elastomer sheet and the fabric are peeled off in the longitudinal direction of the sample sheet (the fabric on the front surface is peeled from the elastomer sheet and the fabric on the back surface, or the fabric on the back surface and the elastomer sheet and By peeling off the surface cloth).

The stretchable fabric preferably has a breaking elongation of 200% or more when a notch is formed.
It is more preferably at least 50%, most preferably at least 300%. In addition, the stretchable fabric preferably has a breaking strength of notch of not less than 1300 g / 40 mm, more preferably not less than 1500 g / 40 mm, and most preferably not less than 2000 g / 40 mm. In addition, the elongation of 200% means a state of elongation to three times the length in the initial state (under no stress).

Here, the breaking elongation and the breaking strength are measured as follows. [Measurement Method of Breaking Elongation and Breaking Strength] First, a stretchable fabric is cut into a rectangular shape having a width of 40 mm and a length of 70 mm to obtain a sample sheet. One notch is inserted in the obtained sample sheet. Here, the notch is provided at the center in the width direction at one end in the longitudinal direction of the sample sheet, and has a length of 10
mm. Then, the notch of the sample sheet provided with the notch is provided, and each of the divided end portions is gripped by a measuring machine described below at a distance between chucks of 20 mm.
Then, under the following conditions, the elongation and strength at the time of pulling and breaking the sample sheet in the length direction are measured, and these are defined as the breaking elongation and breaking strength at the time of notching. Conditions: measuring machine; "Tensilon RTA-100" (manufactured by Orientec) Tensile speed: 300 mm / min

Incidentally, the elongation at break of the stretchable fabric is 200
% Or more, and the breaking strength is 500 g / 2
It is preferably at least 5 mm, more preferably at least 750 g / 25 mm, most preferably at least 1000 g / 25 mm. The elongation at break and the strength at break were determined by cutting a stretchable fabric into a width of 25 mm and a length of 150 mm to obtain a sample sheet. The obtained sample sheet was mounted on a measuring machine described below at a chuck distance of 100 mm, and a tensile speed of 300 mm / 1 Ten minutes (reciprocation), the elongation and strength of the sample sheet at break were measured, and these were taken as the elongation at break and strength at break.

The stretchable fabric 1 of the embodiment shown in FIG.
Is 0.5 g / cm^Two0.3-2.0 thickness under load
mm, preferably 0.3 to 1.0 mm
Is more preferable. If the thickness is less than 0.3mm
The stiffness is eliminated, and the fastening operation as a fastening member becomes difficult.
If it exceeds 2.0 mm, the rigidity will increase and the
Within the above range, since the cutting properties may be reduced.
Is preferred. In addition, the stretchable fabric 1 of the embodiment shown in FIG.
Has a basis weight of 30 to 180 g / m ^TwoPreferably
30-100g / m^TwoMore preferably
No. The basis weight is 30 g / m^TwoIf it is less than, the stiffness disappears
The fastening operation as the fastening member becomes difficult, and 1
80 g / m^TwoIf it exceeds, rigidity will increase and fit will be poor
It is preferable to set it within the above range because
No.

The stretchable fabric 1 of the embodiment shown in FIG. 1 is formed by laminating the above-mentioned stretchable elastomer sheet 2 and the above-mentioned fabric 3 having a cloth-like feel and extensibility. And has a cloth-like feel. Therefore, the above-mentioned stretchable fabric 1 is suitable as a material for a fastening member of a disposable diaper that requires stretchability and good texture and feel.

Next, a second embodiment of the stretchable fabric 1 will be described with reference to FIG. Here, FIG. 2 is a schematic cross-sectional view (corresponding to FIG. 1) showing the structure of the second embodiment of the stretchable fabric used as the material for the fastening member in the disposable diaper of the first invention. In the second embodiment shown in FIG. 2, only the points different from the first embodiment shown in FIG. 1 will be described.
The detailed description of the embodiment is appropriately applied. In FIG. 2, the same members as those in FIG. 1 are denoted by the same reference numerals.

The stretchable fabric 1 of the embodiment shown in FIG. 2 is formed by laminating a fabric 3 on both sides of an elastomer sheet 2.
The stretchable fabric 1 having such a structure has a fabric-like texture and feel further improved by laminating the fabric on both surfaces of the elastomer sheet 2. In this case, the two fabrics 3 may be the same or different depending on the use of the stretchable fabric 1.

The stretchable fabric used as the material for the fastening member in the disposable diaper of the first invention has been described based on the preferred embodiment. However, the stretchable fabric is not limited to the above embodiment. Various changes are possible. For example, in the stretchable fabric 1 of the embodiment shown in FIGS. 1 and 2, the size of the elastomer sheet 2 and the size of the fabric 3 do not need to be the same, for example, a predetermined position on the elastomer sheet 2. The above-mentioned cloth 3 may be laminated only on the surface.

Next, the disposable diaper of the first invention using the above-mentioned stretchable fabric as a material for a fastening member is shown in FIGS.
This will be described with reference to FIG. Here, FIG. 3 is a partially cutaway plan view of an exploded disposable diaper as a first embodiment of the disposable diaper of the first invention as viewed from the back sheet side, and FIG. 4 is a perspective view of the disposable diaper shown in FIG. FIG. 5 is an enlarged perspective view showing a fastening tape, and FIG. 5 is an enlarged perspective view showing another embodiment of the fastening tape shown in FIG. 4;
FIG. 6 is an enlarged perspective view showing another embodiment of the fastening tape shown in FIG. 4; FIG. 7 is a perspective view showing a disposable diaper having a waist belt as a second embodiment of the disposable diaper of the first invention. FIG. 8 is a front view showing
9 is a developed view showing a state before the disposable diaper shown in FIG. 7 is mounted, and FIG. 9 is a developed view showing another mode of the disposable diaper shown in FIG. In the disposable diaper shown in FIGS. 3 to 9, points not particularly described are the same as those of the conventional disposable diaper. 3 to 9, the same members are denoted by the same reference numerals.

The deployable disposable diaper 100 shown in FIG.
Is a liquid-permeable top sheet 11, a liquid-impermeable back sheet 12, and a liquid-retentive absorber 26 interposed between the sheets.
It has. In addition, the disposable diaper 100 has an abdominal part C located on the abdomen of the wearer and a dorsal part A located on the dorsal side when worn. Fastening tapes 15 as fastening members are respectively disposed on left and right side edges A ′ and A ″ of the back side portion A.
5, the back part A and the abdominal part C are held and fixed when the diaper is worn. A landing tape 54 for fastening the fastening tape is provided substantially at the center of the abdomen C. On the top sheet 11, a three-dimensional guard 32 having a free end 32b on the inner side of the diaper, which is formed by fixing the leak-proof sheet 32a on the outer side of the diaper, is arranged.

When the diaper is worn, the waist elastic members 23 and 23 'and the waist elastic members 23 and 23' are provided on the abdominal waist portion 13 and the back waist portion 14 located at the waist of the wearer and the legs located around the legs, respectively. Leg portion elastic members 22, 22 'are provided. Further, also in the three-dimensional guard 32, three-dimensional guard elastic members 34 and 34 'are arranged at the free end 32b. The three-dimensional guard elastic members 34, 34 ′ are covered with the three-dimensional guard 32 at the free end 32 b on the inner side of the diaper by folding the edge of the above-mentioned leakage prevention sheet 32 a into a tubular shape. Is arranged.

The top sheet 11 and the back sheet 1
As 2, a material similar to a material conventionally used in a disposable diaper can be used without particular limitation. In particular, as the back sheet 12, a composite sheet formed by laminating a nonwoven fabric and a film is used. Arranging so that the nonwoven fabric side of the composite sheet faces the outside of the diaper,
This is preferable because a cloth-like texture can be imparted to the disposable diaper. Further, in this case, by using the non-woven fabric is engaged with the male member of the mechanical fastener, by providing the male member on the fastening tape 15,
There is also an advantage that the landing tape can be omitted. The composite sheet preferably has moisture permeability from the viewpoint of preventing stuffiness during wearing. In order to impart moisture permeability to the composite sheet, for example, a film having moisture permeability may be used as the film. The moisture permeability (JIS Z 0208) of the composite sheet is 0.5 g / (cm ^2.
h) or more, preferably 1.0 g / (cm ^2.
h) It is still more preferred. The upper limit of the moisture permeability of the composite sheet is not particularly limited, but is up to about 5.0 g / (cm ² · h) in consideration of water resistance and the like. Also,
The water resistance (JIS L 1092) of the composite sheet is 5
It is preferably at least 0 cm, more preferably at least 100 cm, particularly preferably at least 200 cm.

At a position between the fastening tapes 15 on the back side portion A, a waist elastic member 80 is provided in an extended state between the back sheet 12 and the absorber 26. In FIG. 3, three waist elastic members 80 are provided over the entire area between the fastening tapes 15. Each waist elastic member 80 is disposed so as to be located inside the width of the base end portion 62 of the fastening tape 15. By disposing the waist elastic member 80 in an extended state, the space between the fastening tapes 15 becomes a portion having elasticity,
The portion is gathered by the waist elastic member 80. As a result, a shearing force is generated when the fastening tape 15 is fixed, and as described later, by providing a male member or a female member of a mechanical fastener to the fastening tape 15, The resultant force further increases.

The fastening tape 15 is
At least a part thereof is formed from the above-mentioned stretchable fabric. More specifically, the fastening tape 15 is
As shown in FIG. 3, a base end portion 62 sandwiched and joined and fixed between the top sheet 11 and the back sheet 12.
And an elastic part 65 connected to the base end part 62 and formed by the elastic cloth (see FIG. 4); and a male member of a mechanical fastener connected to the elastic part 65 and It comprises a locking portion 63 having a female member and a knob portion 64 connected to the locking portion 63. In this case, the stretchable fabric is arranged such that at least the stretchable fabric faces the top sheet side of the diaper.

The structure of the fastening tape 15 will be described in more detail with reference to FIG. 4. The base end portion 62 and the elastic portion 65 are integrally formed of the same material, that is, the elastic fabric. The extendable portion 65 and the locking portion 63 are connected via a joint 68.

The locking portion 63 is formed by a male member or a female member of a film sheet and a mechanical fastener provided on the film sheet. Further, the knob portion 64 is formed from the film sheet extending from the system portion 63. When the locking portion 63 includes a male member of a mechanical fastener, the landing tape 54 is formed of a female member of a mechanical fastener. When the female member 63 is provided with a female member of a mechanical fastener, a landing tape made of a male member of a mechanical fastener is used. As the male member of the mechanical fastener, one in which a large number of anchor-type male engaging members are arranged on a base sheet, or one in which a large number of fishing-type male engaging members are arranged on a base sheet And the like. In addition, examples of the female member of the mechanical fastener include various nonwoven fabrics and knits such as a tricot knit.

The joining portion 68 is formed by joining the elastic portion 65 and the locking portion 63 using a normal joining method without any particular limitation. In FIG. One end and the one end of the locking portion 63 are joined by partially bonding them by, for example, partially heating and fusing. Further, the base end portion 62 may be joined to the top sheet 11 and the back sheet 12 by being partially adhered by, for example, being partially heated and fused. It may be joined by, for example,

Since the disposable diaper 100 shown in FIG. 3 is configured as described above,
The elastic part 65 of FIG. 5 can be stretched so that the locking part 63 can be fixed to the landing tape 54, so that it is excellent in fitting property and leakage prevention, and skin irritation even when the fastening tape hits the wearer during wearing. It is less likely. Further, the engagement force between the male member and the female member is further increased by the shearing force generated by the contraction of the stretched portion 65, and peeling of the fastening tape during wearing is effectively prevented.

Next, another embodiment of the fastening tape as a fastening member used in the disposable diaper of the first invention will be described in detail with reference to FIG. The fastening tape 15A of the form shown in FIG. 5 is formed such that the base end portion 62A is wide, and the expansion and contraction portion 65A is widened toward the base end portion 62A side. Is further improved. In this case, the ratio (W1: W2) of the width W1 at the fixed end of the fastening tape 15A (that is, the width of the portion crossed by A ″ in FIG. 5) and the width W2 at the tip (that is, the tip of the knob 64A). ) Is 1: 1 (ie, as shown in FIG. 4)
~ 5: 1 is preferable from the point of fit,
More preferably, the ratio is 2: 1 to 3: 1. The other points are all the same as those of the fastening tape of the embodiment shown in FIGS. 3 and 4, and the above description is appropriately applied.

Next, referring to FIGS. 6A and 6B,
Another form of the fastening tape as the fastening member used in the disposable diaper of the first invention will be described in detail. The entirety of the fastening tape 15B of the form shown in FIG. 6A is integrally formed of the above-mentioned stretchable fabric. Then, a male member or a female member of the mechanical fastener is joined to a position slightly inside from the distal end portion with an adhesive such as hot melt to form a locking portion 63B. The locking part 6
The area from the left end of 3B to the fixed end of the fastening tape (that is, the portion where A ″ crosses in FIG.
5B, and the region from the right end to the tip of the locking portion 63B functions as a knob 64B. In the fastening tape of this embodiment, the elastic portion 65B is a substantially expandable and contractable portion, and its length [FIG. 6 (a)].
Is indicated by the middle symbol D] is 5 to 50 mm, particularly 10 to 30 m
m is preferred from the viewpoint of improving the fit. Also, the fastening tape 15B of the form shown in FIG.
As in the case of the fastening tape of the embodiment shown in FIG. 5, the base end portion 62B is made wide and the elastic portion 65B
Are formed so as to become wider toward the base end 62B side, so that the fit is also improved. However, the shape of the fastening tape 15B of the present embodiment can also be a shape as shown in FIG.

Further, the fastening tape 15B in the form shown in FIG. 6A can be in the form shown in FIG. 6B. Fastening tape 15B 'shown in FIG.
Is substantially the same as that of the fastening tape 15B shown in FIG. 6A, and different points are as follows. That is,
In a region of a predetermined width from the base end portion 62B 'of the elastic portion 65B', the upper and lower ends of the elastic portion 65B 'are substantially parallel to each other to form a wide portion. Further, 'in the area of up to, the stretchable portion 65B' from the width wide portion engaging portion 63B with the upper end is dropping at an angle theta _1, the lower end has risen at an angle theta _2, to the locking portion 63B ' It becomes narrower as it goes. In this case, θ ₁ ≦ θ ₂ and θ ₁ ≦
45 ° and θ ₂ ≦ 45 ° are preferred from the viewpoint of improving the fit.

[0059]

The disposable diaper 100 having a waist belt shown in FIGS.
1. It has a liquid-impermeable back sheet 12 and a liquid-retentive absorber 26 interposed between these two sheets, and is located on the abdominal part C located on the abdomen of the wearer and on the back when used. A back side portion A is formed.

The absorbent body 26 in the disposable diaper 100 is formed in an hourglass shape with a narrowed crotch region. In addition, the crotch region of the top sheet 11 and the back sheet 12 is also curved in accordance with the shape of the absorber 26 as described above. And the above-mentioned absorber 2
6 is sandwiched and fixed by the top sheet 11 and the back sheet 12. In addition, the waist portion and the leg portion in the peripheral portion of the absorber 26 are provided with waist elastic members 23 and 23 'and leg elastic members 22, for fitting the wearer's body when the diaper is worn.
22 'are provided fixedly by the top sheet 11 and the back sheet 12, respectively.

On the left and right sides of the disposable diaper 100 in the longitudinal direction, non-woven fabrics are respectively arranged to provide a three-dimensional guard 32,
32 'are formed. The free ends 33, 33 'of the three-dimensional guards 32, 32' are attached to the three-dimensional guard elastic members 34, 3 respectively.
4 'are arranged to form gathers.

In the disposable diaper 100 shown in FIG. 7 and FIG.
Symmetrical waist belts 40a and 40b as fastening members are connected to 1 and A2, respectively. The left and right waist belts 40a, 40b are respectively
The width is narrowed from to the tip portion 41. Of the left and right waist belts 40a, 40b, the front end 41 of the waist belt 40a on the top sheet side
The waist belt 40b is provided with a waist belt locking portion 44.
The left and right waist belts 40 are brought into contact with each other.
The a and 40b can be fixed on the abdominal side of the wearer. A total of four diaper locking portions 4 are provided on each of the left and right sides of the abdominal portion C, two on each side.
8, 48 'are provided, and the diaper locking portions 48, 4 are provided.
8 'is brought into contact with the waist belts 40a and 40b so that the diaper can be fixed.

The waist belt locking portion 44 and the diaper locking portions 48, 48 'are each formed of a male member of a mechanical fastener.

The waist belt body 45 in the waist belts 40a and 40b is preferably formed of a laminate of at least two layers formed by laminating a nonwoven fabric and a film sheet. In addition, it is preferable that the laminate is formed by bonding the nonwoven fabric and the film sheet by partial bonding, specifically, by bonding them in a dotted or linear manner. In particular, a laminate having a three-layer structure in which the nonwoven fabric is disposed on both the front and back surfaces of the film sheet is preferably used.

The waist belts 40a, 40a
b has an elastic portion 43 at least on the base end portion 42 side. The elastic part 43 is provided with the waist belt 40a,
The waist belt body 45 of 40b and the left and right side edges A1, A2 of the back side portion A are provided so as to be connected to each other. The elastic portion 43 is formed from the above-mentioned elastic fabric. In this case, the stretchable fabric is arranged so that at least the stretchable fabric faces the top sheet. As described above, since the stretchable fabric has a cloth-like feel and an excellent texture, the disposable diaper 100 using the stretchable fabric as the stretchable portion 43 is used.
Has a comfortable wearing feeling. In addition, the waist belts 40a and 40b follow the movement of the wearer by the elastic portion 43 formed of the elastic fabric, so that the fit is particularly good. Further, the engaging force of the locking portion 44 to the waist belts 40a, 40b is further improved by the shearing force generated by the contraction of the stretched elastic portion 43, and the fastening of the waist belts 40a, 40b during wearing is improved. It is definitely done.

The ratio of the length L1 of the waist belt body 45 to the length L2 of the elastic portion 43 (see FIG. 11)
It is preferable that 1: L2 = 90 to 0:10 to 100.

The disposable diaper 1 shown in FIG. 7 and FIG.
In 00, the waist belt has the elastic portion at the base end side, but instead, the entire waist belt may be made of the elastic portion. That is,
As shown in FIG. 12, the entire waist belt may be formed from the stretchable fabric. Further, the waist belt engaging portion 44, instead of the male member of the mechanical fastener may be formed the female member or these mechanical fasteners.

Next, the disposable diapers of the second to fourth inventions will be described. In addition, about the disposable diaper of 2nd invention-4th invention, only the point different from the disposable diaper of 1st invention is demonstrated, About the same point, description regarding the disposable diaper of 1st invention is applied suitably.

In the disposable diaper according to the second aspect of the present invention, at least a part of the fastening member is formed by joining a pleated cloth to at least one surface of a sheet made of an elastomer having elasticity. The stretchable fabric is formed from a stretchable fabric having a stretch stress of 30% or less and a stretch stress of 100% or more of 100 g / 25 mm or more .
The fabric is arranged so as to face the top sheet side.
The fastening member is a male member or a female member of a mechanical fastener.
It is equipped with a. As the sheet and the cloth, those similar to those used in the first invention can be used. As the above-mentioned stretchable fabric, for example, those described in JP-A-59-59901 and JP-A-7-21554 can be suitably used. The method for producing the stretchable fabric from the sheet and the fabric is not particularly limited, and may be appropriately selected depending on the purpose and application, for example, as described in JP-A-59-59901 and JP-A-7-59. The method described in JP-A-213554 can be used. Since the stretchable fabric has a structure in which a fabric folded on at least one surface of the sheet is joined, buckling strength in the vertical direction is improved. That is, even when the basis weight of the stretchable fabric is low, the stretchable fabric is preferable because it becomes a material having firmness.

In the disposable diaper according to the third aspect of the present invention, at least a part of the fastening member is made of an elastomer having elasticity and a fiber web is entangled and laminated on at least one surface of a sheet having openings. The permanent set is 30% or less and the 100% elongation stress is 100 g / 25.
mm or more stretchable fabric , the stretchable fabric,
The fiber web is arranged so as to face the top sheet side.
The fastening member is a male member of a mechanical fastener or
Has a female member . The sheet is made of an elastomer having elasticity and has a predetermined opening. As a specific example, FIG.
Urethane grid nets (nets) and non-woven fabrics shown in
A perforated film having a large number of holes as shown in FIGS. Here, the holes in the perforated film shown in FIG. 10B are round, the holes in the perforated film shown in FIG. 10C are star-shaped, and the holes in the perforated film shown in FIG. The hole is a combination of a round and a star. On the other hand, as the above-mentioned fiber web, a staple fiber or the like which is mechanically entangled using a card machine to form a web is used. As a method for producing the stretchable fabric from the sheet and the fiber web, for example, a method described in JP-A-7-70902 can be used. Since the stretchable fabric has a structure in which a fiber web is entangled and laminated on at least one surface of the sheet having the openings, the stretchable fabric has high air permeability and is flexible and drapable because there is no stiffness peculiar to the film. It is preferable because it is rich.

In the disposable diaper according to the fourth aspect of the present invention, at least a part of the fastening member non-uniformly stretches a laminated sheet in which a nonwoven fabric is laminated on at least one surface of a sheet made of an elastic elastomer. ,
Permanent set is 30% or less and 100% elongation stress is 100g
/ 25 mm or more of an elastic cloth,
The fabric is oriented such that the laminated sheet faces the top sheet.
The fastening member is a male member of a mechanical fastener.
A member or a female member is provided . As the sheet and the nonwoven fabric, those similar to those used in the first invention can be used. There is no particular limitation on the method for producing the stretchable fabric from the sheet and the nonwoven fabric,
For example, after the sheet and the nonwoven fabric are joined and fixed by a predetermined joining means (adhesive or the like) to obtain a laminated sheet, the laminated sheet is partially stretched using a tenter or the like (uniaxial or biaxial). It is manufactured by doing. In addition, Table 6
It is also manufactured by the method described in JP-A-505408. Since the stretchable fabric has a structure in which the laminated sheet is stretched non-uniformly, various nonwoven fabrics can be used without impairing the texture of the nonwoven fabric used, and a sheet with a good touch can be obtained. preferable.

[0073]

The following examples illustrate the effectiveness of the stretchable fabric of the present invention. However, it goes without saying that the scope of the present invention is not limited to such an embodiment.

Example 1 A film made of an ethylene-α-olefin copolymer produced by using a metallocene as a catalyst (manufactured by Dow Chemical Company, thickness: 50 μm, basis weight 43 g / m ² , permanent set: 12) %) On both sides of a spunbond nonwoven fabric (0.5 g / c)
(thickness under m ² : 0.3 mm, basis weight 25 g / m ² , elongation at break: 150%), and they are inserted between a pair of embossing rolls to join and fix them, and to be stretchable. A fabric was obtained. The joining and fixing by the embossing rolls are performed under the conditions of a temperature of 70 ° C. and 5 kg / cm ² , along with the direction of expansion and contraction of the extensible cloth, where a circular compression joining portion having an area of 0.8 mm ² is 3 mm. The process was performed so that a large number were formed regularly at intervals of 0.0 mm. As a result, the ethylene-α-olefin copolymer was not substantially present between the polypropylene fibers constituting the spunbonded nonwoven fabric. For the obtained stretchable fabric, a permanent set and 1
The 00% elongation stress was measured and the texture was evaluated by the following method. Table 1 shows the results.

<Evaluation method of texture> Ten panelists evaluated, and when 10 to 8 persons answered that it was good, it was evaluated as ◎, and when 7 to 5 people answered that it was good, they were evaluated as ○.
The case where 4 or 2 responded as good was evaluated as Δ, and the case where 1 or less answered good was evaluated as x.

Example 2 Instead of the spunbonded nonwoven fabric used in Example 1, a heat roll nonwoven fabric (0.5 g /
A stretchable fabric was obtained in the same manner as in Example 1 except that the thickness under cm ² : 0.6 mm, the basis weight: 25 g / m ² , and the elongation at break: 200%). The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

Example 3 Instead of the spunbonded nonwoven fabric used in Example 1, a spunlace nonwoven fabric (thickness under 0.5 g / cm ² : 0.6 mm, made of polyethylene terephthalate (PET) fiber) Basis weight 25
g / m ² , elongation at break: 150%) and a urethane melt blown nonwoven fabric (thickness under 0.5 g / cm ²⁾ :
A stretchable fabric was obtained in the same manner as in Example 1 except that 0.1 mm, basis weight of 30 g / m ² , and permanent strain: 14%) were used. The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

Example 4 A card web of PET fiber (basis weight: 20 g / m ² ) was coated with a urethane spunbond nonwoven fabric [Kanebo's Espansione (trade name), basis weight: 5]
0 g / m ² ], and the PET fibers constituting the card web were entangled and laminated on the spunbonded nonwoven fabric by a high-speed water flow to obtain a stretchable fabric. The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

Example 5 A suction heat-bonded nonwoven fabric (basis weight: 20 g / m ² ) formed of a core-sheath type conjugate fiber made of PP / PE was applied to an SEBS (styrene-ethylene-butadiene-styrene) film ( Basis weight: 25
g / m ² ) and Example 1 at 100 ° C.
In the same manner as described above, a laminated sheet was obtained by joining and fixing. The obtained laminated sheet was uniaxially stretched (twice) with a tenter to obtain a stretchable fabric. The resulting stretchable fabric was non-uniformly stretched. The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

[Example 6] The suction heat-bonded nonwoven fabric used in Example 5 and the SEBS-based film (same as that used in Example 5) that had been stretched (doubled) in advance were hot melt bonded. The elastic fabric was obtained by bonding and fixing with an agent. In this stretchable fabric, the suction heat-bonded nonwoven fabric was folded due to the shrinkage of the SEBS-based film. The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

Example 7 The suction heat-bonded nonwoven fabric and the SEBS film used in Example 5 were joined and fixed with a hot melt adhesive to obtain a laminated sheet. The obtained laminated sheet was partially uniaxially stretched by a tenter to obtain a stretchable fabric. The same measurement and evaluation as in Example 1 were performed on the obtained stretchable fabric. Table 1 shows the results.

[0082]

[Table 1]

Example 8 The disposable diapers shown in FIGS. 3 and 4 were prepared by using the stretchable fabrics obtained in Examples 1 to 7 as a material for an elastic portion of a fastening tape.
The fastening tape in the disposable diaper had a male member of a mechanical fastener.
In the obtained disposable diaper, the feeling and feel of the fastening tape were good. Further, in the fastening tape, the engaging force was sufficiently high due to the shearing force generated by the contraction of the elastic fabric.

[0084]

According to the disposable diaper of the present invention, the fastening member has an excellent touch and texture, and has a comfortable wearing feeling. In particular, since the fastening member is provided with a male member or a female member of a mechanical fastener, the shearing forces generated by the contraction of the elastic cloth is a material that forms a該止adhesive member, engaging the該止attachment member The resultant force is further improved.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a structure of a first embodiment of a stretchable fabric used as a material for a fastening member in a disposable diaper of the first invention.

FIG. 2 is a schematic sectional view (corresponding to FIG. 1) showing the structure of a second embodiment of a stretchable fabric used as a material for a fastening member in the disposable diaper of the first invention.

FIG. 3 is a partially cutaway plan view of a deployable disposable diaper as a first embodiment of the disposable diaper of the first invention, as viewed from a back sheet side.

4 is an enlarged perspective view showing a fastening tape in the disposable diaper shown in FIG.

FIG. 5 is an enlarged perspective view showing another embodiment of the fastening tape shown in FIG.

6 (a) and 6 (b) are enlarged perspective views showing other forms of the fastening tape shown in FIG. 4.

FIG. 7 is a front view showing a disposable diaper having a waist belt as a second embodiment of the disposable diaper according to the first invention, in a mounted state.

FIG. 8 is a developed view showing a state before the disposable diaper shown in FIG. 7 is attached.

FIG. 9 is a development view showing another embodiment of the disposable diaper shown in FIG.

FIGS. 10 (a) to (d) are plan views of a sheet having an aperture constituting a fastening portion of the disposable diaper of the third invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stretchable fabric 2 Sheet made of elastomer having elasticity 3 Stretchable fabric

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-227780 (JP, A) JP-A-8-199423 (JP, A) JP-A-8-269859 (JP, A) JP-A-8-1994 246322 (JP, A) Japanese Utility Model Hei 1-58609 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61F 13/49 A61F 5/44 A61F 13/56

Claims (15)

(57) [Claims] 1. A liquid-permeable topsheet, a liquid-impermeable backsheet, and a liquid-retentive absorber interposed between the topsheet and the backsheet, and the wearer's belly when worn. A disposable diaper having an abdominal portion located on the back side and a dorsal portion located on the dorsal side, wherein fastening members for holding and fixing the dorsal portion and the abdominal portion when worn are provided on the left and right sides of the dorsal portion. The fastening member is provided on both side edges, and at least a part of the fastening member is formed by joining an extensible fabric to at least one surface of a sheet made of an elastic elastomer. The stretchable fabric is formed from a stretchable fabric having a 100% elongation stress of 100 g / 25 mm or more.
The fastening member is arranged so as to face the top sheet side, and the male member or the female portion of the mechanical fastener is provided.
Disposable diapers characterized by having materials . 2. A sheet made of the elastomer is made of a film-like sheet or non-woven sheet, according to claim 1 Symbol placing disposable diaper. Wherein said stretchable fabric made of a nonwoven fabric, a disposable diaper according to claim 1 or 2. 4. The disposable diaper according to claim 3 , wherein the nonwoven fabric has substantially no bonding points between constituent fibers and is a nonwoven fabric formed by entanglement of constituent fibers. Wherein said nonwoven fabric has a plurality of attachment points due to fusion among the fibers constituting a nonwoven fabric constituting the fiber length have been made larger than the distance between adjacent point of attachment, claim 3
The disposable diaper described. 6. The stretch fabric according to claim 1, wherein said stretchable fabric is formed by embossing said sheet of said elastomer and said stretchable fabric to form a plurality of fixed portions, and said sheet of said elastomer and said stretchable fabric are substantially formed. The disposable diaper according to any one of claims 1 to 5 , wherein the disposable diaper has an uncompressed portion not joined to the diaper. 7. has sites having stretchability between said fastening member is provided in the rear section, a portion having the elastic is crimped by an elastomeric member, any claim 1-6 The disposable diaper described in Crab. 8. The fixing device according to claim 1, wherein the fastening member is sandwiched and fixed between the top sheet and the back sheet.
A disposable diaper according to any one of claims 1 to 7 . 9. A width W1 at a fixed end of the fastening member.
The disposable diaper according to any one of claims 1 to 8 , wherein a ratio (W1: W2) between the width and the width W2 at the distal end portion is 1: 1 to 5: 1. 10. A length of substantially stretchable part at the fastening member is 5 to 50 mm, disposable diaper according to any one of claims 1-9. 11. The back sheet is made of a composite sheet formed by laminating a nonwoven fabric and a film, according to claim 1-10
The disposable diaper according to any of the above. 12. The method according to claim 12, wherein the composite sheet has a thickness of 0.5 g / (cm ^2).
The disposable diaper according to claim 11 , which has a moisture permeability of h) or more. 13. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the top sheet and the back sheet, and the wearer's belly when worn. In a disposable diaper having an abdominal part located on the back side and a dorsal part located on the dorsal side, a fastening member for holding and fixing the dorsal part and the abdominal part when worn is provided on the left and right sides of the dorsal part. The fastening member is provided on both side edges, and at least a part of the fastening member is formed by joining a cloth folded on at least one surface of a sheet made of an elastic elastomer, and has a permanent set of 30% or less. and 100% elongation stress is made elastic cloth over 100 g / 25 mm, the elastic cloth is attached the folds
Fabrics have been arranged so as to face the top sheet side, it said fastening member is a male member or female portion of the mechanical fastener
Disposable diapers characterized by having materials . 14. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the top sheet and the back sheet, and the wearer's belly when worn. In a disposable diaper having an abdominal part located on the back side and a dorsal part located on the dorsal side, a fastening member for holding and fixing the dorsal part and the abdominal part when worn is provided on the left and right sides of the dorsal part. Permanent distortion is provided on both side edges, at least a part of the fastening member is made of an elastomer having elasticity and a fiber web is entangled and laminated on at least one surface of a sheet having openings. Is 30% or less and 100% elongation stress is 100 g / 2
It formed from more elastic cloth 5 mm, the elastic cloth
Are arranged so that the fiber web faces the topsheet side.
It is, the fastening member is a male member or female portion of the mechanical fastener
Disposable diapers characterized by having materials . 15. A liquid-permeable topsheet, a liquid-impermeable backsheet, and a liquid-retentive absorber interposed between the topsheet and the backsheet, and the wearer's belly when worn. A disposable diaper having an abdominal portion located on the back side and a dorsal portion located on the dorsal side, wherein fastening members for holding and fixing the dorsal portion and the abdominal portion when worn are provided on the left and right sides of the dorsal portion. It is provided on both side edges, at least a part of the fastening member, non-uniformly stretched a laminated sheet obtained by laminating a nonwoven fabric on at least one surface of a sheet made of elastic elastomer, Permanent strain is 30% or less and 100% elongation stress is 10
0 g / 25 mm or more of stretchable fabric ,
In this case, the laminated sheet faces the top sheet side.
Are arranged in earthenware pots, the fastening member is a male member or female portion of the mechanical fastener
Disposable diapers characterized by having materials .