JP5476016B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

Conventionally, as one of the paper diapers, in order to be worn by the wearer, a fastening part provided so as to project laterally from the left and right sides of the back side of the paper diaper, and a paper diaper so as to fasten the fastening part 2. Description of the Related Art A stationary disposable paper diaper provided with a to-be-sealed portion provided on the ventral side is known (see, for example, Patent Document 1).
When attaching this disposable paper diaper to the human body, after applying the stomach part and back part of the paper diaper to the wearer's abdomen and back part, the fastening part is respectively applied from the left and right sides of the wearer. The paper diaper is fixed by wrapping around the ventral side and locking it to the affixed portion on the ventral side.
In such a fastening-type paper diaper, each fastening part on the left and right is made up of two fastening tapes, and cross-fastening may be performed to improve fit. By securely fixing the paper diaper with such a cross stopper, the paper diaper is not easily detached or loosened even when the wearer moves around.

Japanese Utility Model Publication No. 6-75452

  However, when cross-fastening the fastening part as described above, the tape part is pulled obliquely during installation, so the force concentrates on the nonwoven fabric of the tape attachment part and breaks the boundary between the tape and the nonwoven fabric. There was a problem that it was easy to do.

  The subject of this invention is making it a structure which is hard to be damaged when a fastening part is pulled in the diagonal direction in an absorbent article.

In order to solve the above problem, the invention according to claim 1 is:
A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material has a cutout portion in which a corner portion far from the center of the fastening portion among the corner portions on the base end side is cut out linearly and obliquely.

The invention described in claim 2
A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening portions includes two pentagonal fastening tape bases each having two obtuse angles and three right angles,
The two fastening tape base materials are arranged such that two obtuse angles are located at the proximal end portion and three right angles are located inside the proximal end portions of the distal end portion and the fastening portion .

The invention according to claim 3
A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material is characterized in that, among corner portions on the base end side, a corner portion far from the center of the fastening portion has a notch portion that is obliquely cut out by an S-shaped curve. .
The invention according to claim 4
A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material is cut diagonally by an arc-shaped curve in which a corner farther from the center of the fastening portion of the corners on the base end side is convex toward the center of the fastening portion. It is characterized by having a cut-out portion.
The invention described in claim 5
A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material has a notch portion in which two corner portions on the base end side are notched linearly and obliquely.

Invention of Claim 6 is an absorbent article as described in any one of Claims 1-5 ,
The fastening tape substrate is made of plastic.

  According to the present invention, when the two fastening tape bases arranged in parallel in the vertical direction are pulled and fixed in the crossing direction, the line segment of the cutout part cut out with respect to the pulling direction becomes closer to a right angle. Therefore, the stress in the region where the base end portion is fixed is dispersed, and it is difficult to break when the fastening portion is pulled in an oblique direction.

It is an expansion | deployment top view which shows the disposable paper diaper in this invention. It is the perspective view which assembled the disposable paper diaper of FIG. 1 in the state at the time of mounting | wearing. It is an expansion schematic diagram which shows the fixation part of the disposable paper diaper of FIG. It is a figure which shows the modification of a fixation part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated example.

  A disposable paper diaper (hereinafter referred to as a paper diaper) 1 will be exemplified and described as an absorbent article in the present embodiment.

  As shown in FIGS. 1 and 2, the paper diaper 1 includes a main body portion 10 that is a main body of a paper diaper, fastening portions 20 and 20 for mounting the main body portion 10 on a human body, and locking the fastening portion 20. A fixed portion 30 is provided. That is, the paper diaper 1 is a fixed-type paper diaper that is mounted by fixing the fixing portions 20, 20 to the fixing portion 30.

The paper diaper 1 is formed so as to cover the crotch portion of the human body from the abdominal side to the back side when worn.
Specifically, one end portion of the main body portion 10 forms a ventral side portion 11 positioned on the abdomen side of the human body, and the other end portion forms a dorsal side portion 12 positioned on the back side of the human body, A crotch portion 13 is formed between the side portion 11 and the back side portion 12 and is located in the crotch of the human body.
Moreover, the abdominal side extension part 111,111 extended in both the outer sides rather than the crotch part 13 in the abdominal side part 11, and the back side extension part (extended in the both sides outside the crotch part 13 in the back side part 12 ( When the disposable diaper 1 is mounted, the waistline portion 14 is formed. At this time, an elastic member 141 such as rubber thread is provided along the width direction in the center of the edge portion along the trunk direction of the back side portion 12, and a planar gather is formed by the elastic member 141. Is configured to be stretchable so as to fit around the wearer's torso. In addition, it can also be set as the structure which does not have this plane gather.
In addition, both edge portions of the crotch portion 13 form leg surrounding portions 15 and 15 that surround the legs of the human body when worn from the abdominal side portion 11 to the back side portion 12. The leg surrounding portions 15 and 15 are provided with elastic members 151 such as rubber thread in accordance with the curved shape, and a flat gather is formed by the elastic members 151, and the leg surrounding portions 15 and 15 fit around the legs of the wearer in a freely stretchable manner. It is designed to prevent side leakage. Note that the elastic member 151 may be arranged in a straight line instead of the curved shape of the leg surrounding portions 15 and 15 to form a planar gather.

  The main body 10 includes a top sheet 10a made of a liquid-permeable nonwoven fabric provided on the contact surface side with the human body, and a liquid-impermeable back sheet 10b provided on the outer side opposite to the contact surface with the human body when worn. An absorber 10c interposed between the top sheet 10a and the back sheet 10b, and a gather sheet 10d provided along the longitudinal direction of the main body 10 on both sides of the absorber 10c on the top sheet 10a side, 10d.

The top sheet 10a is a liquid-permeable sheet that is provided on a surface that comes into contact with the human body when the paper diaper 1 is worn, and plays a role of receiving body fluid and transporting it to the absorber 10c.
The top sheet 10a is preferably a non-woven fabric. Specifically, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. As a fiber material, a material processed by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. In particular, it is preferable to use a nonwoven fabric having a basis weight of 10 to 40 g / m ² processed by a spunbond method or an air-through method.

The back sheet 10b is provided on the surface opposite to the surface in contact with the human body when the paper diaper 1 is worn, and plays a role of preventing body fluid and the like from seeping out and leaking out of the paper diaper 1. It is.
The back sheet 10b is also preferably made of a non-woven fabric as with the top sheet 10a. The back sheet 10b is preferably a sheet material having at least water shielding properties such as polyethylene and polypropylene, and is preferably a moisture permeable sheet material from the viewpoint of preventing stuffiness. In particular, it is preferable to use a nonwoven fabric having a basis weight of 10 to 30 g / m ² processed by a spunbond method or an air-through method.

Note that a sheet material made of a polyethylene film having a basis weight of 10 to 40 g / m ² may be sandwiched between the top sheet 10a and the back sheet 10b.
Moreover, the nonwoven fabric used as the top sheet 10a and the back sheet 10b has a certain directionality (flow) in the fiber. In the paper diaper 1 of the present embodiment, as shown in FIG. Are arranged so as to coincide with the direction from the ventral part 11 toward the dorsal part 12.

The absorbent body 10c is, for example, an absorbent core formed by combining an absorbent material such as cotton or pulp, or a sheet-like base material such as fiber or film and a superabsorbent resin such as a superabsorbent polymer ( (Not shown) is covered with a liquid-permeable crepe paper, a nonwoven fabric, a perforated sheet (not shown) and the like.
Examples of the superabsorbent resin include carboxymethylcellulose, polyacrylic acid and salts thereof, acrylate polymer cross-linked product, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product Products, crosslinked products of carboxymethyl cellulose, polyethylene oxide, polyacrylamide and other partially crosslinked polymers, or a copolymer of isobutylene and maleic acid are preferably used.
The absorber 10c may have a single layer structure or a structure divided into a plurality of layers. The absorber 10c is mounted at a position extending from the abdomen side portion 11 of the human body to the back side portion 12 through the crotch portion 13 between both legs.

The gather sheets 10d and 10d are provided on both sides along the longitudinal direction of the absorbent body 10c from the abdominal side portion 11 to the back side portion 12 on the top sheet 10a side.
The outer portions of the gather sheets 10d and 10d in the width direction are fixed to the upper surface of the top sheet 10a on the side of the absorber 10c. The gather sheet 10d, 10d is not fixed to the top sheet 10a, and a plurality of rubber bands are provided substantially in parallel along the longitudinal direction of the gather sheets 10d, 10d. In addition, a three-dimensional gather that rises in a reverse shape and can be deformed in a stretchable manner according to the wearer's body shape is formed.
It is also possible to adopt a configuration in which the gather sheets 10d and 10d are not provided.

The fastening parts 20, 20 are provided on the left and right sides of the back side extension parts 121, 121 of the back side part 12 so as to protrude outward.
In the present embodiment, the left and right fastening parts 20 and 20 are each provided with two fastening tape base materials 21 and 21 arranged in parallel in the vertical direction.
The fastening tape base materials 21 and 21 are made of a base material sheet in which various plastic films such as polyethylene and polypropylene are formed to a thickness of 40 to 300 [mu] m, particularly preferably 60 to 200 [mu] m, and the base end 21A is a paper diaper 1, a fastening tape 23 that is a locking element of a male material of a hook-and-loop fastener is provided on the inner surface of the tip portion 21 </ b> B (the surface facing the fastened portion 30).
The base end portion 21A of the fastening tape substrate 21 may be attached to the inner surface or the outer surface of the top sheet 10a or the back sheet 10b, or may be fixed by being sandwiched between the top sheet 10a and the back sheet 10b. good.

Here, the shape of the fastening tape substrate 21 will be specifically described.
The fastening tape base material 21 has a cutout portion 22 in which a corner portion far from the center of the fastening portions 20, 20 among the corner portions on the base end portion 21 </ b> A side is cut obliquely in a straight line shape.
That is, as shown in FIGS. 1 to 3, the fastening tape base material 21 is formed in a pentagonal shape including three right angle portions and two obtuse angle portions, and the two obtuse angle portions are located at the base end portion 21 </ b> A, Three right-angled portions are arranged so as to be located inside the distal end portion 21 </ b> B and the proximal end portion 21 </ b> A of the fastening portion 20. The “inside of the base end portion 21 </ b> A of the fastening portion 20” is a side where the two fastening tape base materials 21, 21 face each other.
The fastening tape base material 21 has the cutout portion 22 so that the shape of the base end portion 21A is not parallel to the flow of the nonwoven fabric described above in the dorsal extension portions 121 and 121. When the fastening tape base materials 21 and 21 are pulled in a direction crossing each other, the pulling direction (see FIG. 3) and the inclined portion of the notch portion 22 are closer to the right angle so that the back side extends along the flow of the nonwoven fabric. The protruding parts 121 and 121 can be prevented from tearing.
At this time, it is preferable that the inclination angle of the notch 22 is an angle substantially orthogonal to the pulling direction when the fastening tape base materials 21 and 21 are pulled in a direction crossing each other at the time of mounting.

The to-be-fixed part 30 is provided in the back seat | sheet 10b side which is an outer surface in the stomach side part 11. FIG.
The to-be-fixed part 30 is provided with the latching layer 31 which is a latching element of the female material for latching the fastening tape 23 of the fastening parts 20 and 20. FIG.
The locking layer 31 is configured by arranging a loop material (not shown) that is a loop-like fiber on a base sheet.
This loop material is mechanically engaged with a hook material formed on the surface of the fastening tape 23 on which a large number of protrusions (such as hooks, mushrooms, hooks, etc.) are formed. That is, by superimposing the hook material on the surface of the loop material and engaging a large number of protrusions of the hook material with the surface of the loop material, both members can be detachably and firmly fixed.

  The hook material of the fastening tape 23 can be engaged not only with the loop material but also with a material having a fibrous surface such as a woven fabric, a non-woven fabric, a felt, or a pile. Specifically, for example, a single-composition material or a composite-composition material made of a widely known highly versatile plastic material such as polyethylene, polypropylene, polyethylene terephthalate, or nylon can be used. In this case, it is preferable to use a spunbonded nonwoven fabric composed of long fibers. This is because the short-fiber point bond nonwoven fabric and air-through nonwoven fabric are easy to come off because the fiber length is short, and the strength is insufficient. This is because a spunbonded nonwoven fabric with less fiber dropping is excellent in terms of mechanical performance and productivity.

Next, a method for fixing the fastening portions 20 and 20 of the paper diaper 1 will be described.
When the wearer wears the disposable diaper 1, the abdomen 11 of the disposable diaper 1 is brought into contact with the abdomen, the dorsal part 12 is brought into contact with the dorsal side, and the crotch part 13 is brought into contact with the inseam. The paper diaper 1 is mounted by locking the fastening parts 20, 20 provided on the outlet parts 121, 121 to the fastening part 30 provided on the ventral part 11 across the waist.
At this time, the fastening strength and the like are adjusted by fastening the two fastening tape base materials 21, 21 arranged in parallel in the vertical direction of the fastening parts 20 to cross each other.
Since the notch 22 of the fastening tape base materials 21 and 21 is substantially orthogonal to the pulling direction when the fastening tape base materials 21 and 21 are pulled in a direction crossing each other, the region where the corner portions are fixed. The stress is dispersed.

As described above, according to the paper diaper 1 according to the present embodiment, when the fastening tape base materials 21 and 21 are pulled in a direction crossing each other at the time of mounting, the pulling direction and the inclined portion of the notch 22 are more perpendicular to each other. Since the notch portion 22 is positioned so as to approach, the stress in the region where the base end portion 21A is fixed in the back extension portions 121 and 121 is dispersed, and the fastening tape base materials 21 and 21 cross each other. It becomes difficult to damage the back-side extension part 121 when it is pulled.
Moreover, since the notch part of the notch part 22 is linear, since the rectangular fastening tape base material 21 can be formed only by cut | disconnecting with a cutter etc., for example, manufacture is easy.

The present invention is not limited to the above embodiment.
For example, in the above embodiment, the fastening tape base material 21 is described as having a pentagonal shape in which one notch portion 22 is provided in the base end portion 21A. However, as shown in FIG. It is good also as a hexagon shape which provided two notch parts 22 in the part 21A. In this case, the dimensions of the two notches 22 and 22 can be set as appropriate, and may be the same or different.
Moreover, in the said embodiment, although the shape of the notch part 22 is made into linear form, for example, it is also curvilinear (refer FIG.4 (b) (c)) and jagged shape (refer FIG.4 (d)). good.

Moreover, in the said embodiment, although the whole surface of the top sheet 10a and the back sheet 10b is demonstrated as what is a nonwoven fabric, only the back side extension parts 121 and 121 should just be a nonwoven fabric.
Specifically, the portions other than the back-side extending portions 121 and 121 are formed in a uniaxial or biaxial direction after forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, for example. It is possible to use a microporous sheet material obtained by doing so, a film layer having liquid impermeability, and a laminated nonwoven fabric composed of a nonwoven fabric layer having air permeability. A laminated nonwoven fabric is a nonwoven fabric called a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, for example, and is a nonwoven fabric having both liquid impermeability and air permeability.

[Example]
Hereinafter, the tensile test characteristic evaluation with respect to the fastening part 20 of the paper diaper 1 to which the present invention is applied will be described based on examples. However, the present invention is not limited to this.

(Composition and shape of fastening part)
In this example, as a fastening portion, a rectangular film made of plastic having a length of 33 mm, a width of 101 mm, and a thickness of 125 μm was provided with the following two different cutout portions, which were used as film I and film II, respectively. Moreover, the film which does not provide a notch part was used as the film III as a comparative example.
<Dimension of notch>
The vertical length of the notch is a, and the horizontal length is b. (See Figure 3.)
Film I: a ≦ b (a = 10 mm, b = 25 mm)
Film II: a ≧ b (a = 25 mm, b = 10 mm)

(Tensile test evaluation)
Then, three kinds of films were prepared as described above, SMMS nonwoven having a basis weight of 15 g / ^{m 2,} and fixed to the spunbonded nonwoven fabric having a basis weight of 18 g / ^{m 2,} was performed a tensile test.
The measurement method of the tensile test was set to 500 mm between chucks, 300 mm / min. Each film was pulled in a direction perpendicular to the notch, and the force at the time when the breakage occurred was measured as the tensile strength (N).
As a result, the tensile strength of each film was 44.56N for film I and 48.95N for film II. Moreover, in film III, it was 42.08N.
Therefore, it can be seen that the strength is improved in the case where the notched portion is provided (film I and film II) compared to the case where the notched portion is not provided (film III).

1 Absorbent article (disposable disposable diaper)
DESCRIPTION OF SYMBOLS 10 Main-body part 11 Abdominal side part 12 Back side part 13 Crotch part 20 Fastening part 21 Fastening tape base material 21A Base end part 21B Tip part 22 Notch part 23 Fastening tape 30 Fastening part 31 Locking layer

Claims (6)

A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The said fastening tape base material has a notch part by which the corner | angular part far from the center of the said fastening part among the corner | angular parts by the side of a base end is notched linearly and diagonally, It is characterized by the above-mentioned. . A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening portions includes two pentagonal fastening tape bases each having two obtuse angles and three right angles,
The two fastening tape base materials are arranged such that two obtuse angles are located at the proximal end and three right angles are located inside the proximal end of the distal end portion and the fastening portion. Sex goods. A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material is characterized in that, among corner portions on the base end side, a corner portion far from the center of the fastening portion has a notch portion that is obliquely cut out by an S-shaped curve. Absorbent article. A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The fastening tape base material is cut diagonally by an arc-shaped curve in which a corner farther from the center of the fastening portion of the corners on the base end side is convex toward the center of the fastening portion. An absorbent article having a notched portion. A main body having a ventral part located on the ventral side of the human body and a dorsal part located on the dorsal side, a pair of fastening parts projecting from both side ends of the dorsal part, and an outer surface of the ventral part An absorptive article provided with a to-be-attached part to which the pair of fastening parts are detachably fastened,
Both end portions of the back side portion are made of nonwoven fabric,
Each of the pair of fastening parts includes two fastening tape base materials arranged in parallel in the vertical direction,
The said fastening tape base material has a notch part by which the two corner | angular parts of the base end side were notched linearly and diagonally, It is characterized by the above-mentioned. The said fastening tape base material consists of plastics, The absorbent article as described in any one of Claims 1-5 characterized by the above-mentioned.

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