JP3950258B2 - Disposable paper diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable paper diaper that is provided with a sweat absorbing function around the legs and / or around the waist to prevent sweat rash, eczema, rash, and the like.
[0002]
[Prior art]
Conventionally, as shown in FIG. 7, a disposable diaper provided on the market has a liquid-impervious backsheet 1 made of polyethylene or the like disposed on the back surface side, and a non-woven fabric or the like disposed on the front surface side. It is mainly comprised from the liquid topsheet 2, and the absorber 3 arrange | positioned between these liquid-impervious backsheets 1 and the liquid-permeable topsheet 2, and the said liquid-impervious back | bag is formed in both sides. The sheet 1 extends outward from the side edge of the absorber 3, and the side portion of the barrier sheet 4 made of a nonwoven fabric or the like provided on the surface side is outward from the side edge of the absorber 3. The side flap portion SF not including the absorber 3 is formed by being fixed to the liquid-impervious back sheet 1, and the barrier sheet 4 and the liquid-impervious back sheet 1. Multiple elastic elastic members 8 between them By 8 ... it is arranged along the longitudinal direction of the disposable diaper, pleated flat gather GK is adapted to be formed on the side flap portions SF. Further, the inner sheet portion of the barrier sheet 4 extends in a flap shape from the side edge portion of the absorber 3, and a three-dimensional gather BK is formed standing on the surface side by an elastic elastic member 9 disposed at the tip. .
[0003]
On the other hand, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 extend together on the abdomen and back of the paper diaper, and an end flap portion EF without the absorber 3 is formed, and the end flap portion EF On the other hand, the waist gathers are formed by interposing the elastic elastic band 6 between the liquid-impermeable back sheet 1 and the liquid-permeable top sheet 2.
[0004]
As the barrier sheet 4, a plastic sheet or the like can be used. Usually, in order to improve the touch to the skin and to reliably prevent urine permeation, silicon-based, paraffin-based, alkylchromic chromoid-based water repellent A water repellent nonwoven fabric coated with an agent or the like is used.
[0005]
[Problems to be solved by the invention]
As described above, in the conventional paper diaper, the surface side directly in contact with the skin is covered with the barrier sheet 4 subjected to the water repellent treatment except for the exposed surface of the central liquid-permeable top sheet 2 that allows urine to permeate. Moreover, since the elastic elastic band 6 which does not have water absorption is arrange | positioned between the liquid-permeable top sheet 2 and the liquid-impermeable back sheet 1 also in the waist circumference, the sweat which the wearer wore in these site | parts. There was a problem in that it was not absorbed indefinitely and contacted with the skin of the wearer for a long time, causing sweat, eczema and rash. Especially in the case of infants, it is easy to sweat around the hips and crotch area even outside of summer, and the skin is more sensitive than adults and is likely to cause sweats, eczema, rash, etc. The development of disposable diapers that do not cause any problems was eagerly desired.
[0006]
Accordingly, a main object of the present invention is to provide a disposable paper diaper that effectively prevents sweat, eczema, rash, and the like caused by contact of sweat with the skin for a long time.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention for solving the above problems, an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet, and a water-repellent nonwoven fabric or a plastic sheet is provided on both sides of the paper diaper. A side flap that is formed with a three-dimensional gather standing upright and has no absorbent by the liquid-impervious backsheet extending outward from both side edges of the absorbent body and a water-repellent nonwoven fabric or plastic sheet. In disposable paper diapers with parts formed,
A plurality of elastic elastic members are disposed along the longitudinal direction of the paper diaper between the liquid impervious backsheet and the water repellent nonwoven fabric or plastic sheet on the side flap, and on the surface side of the paper diaper. In addition, a sweat absorbing sheet is attached to the side flap region that overlaps with the plurality of elastic elastic members on the outer side of the standing fixed end of the three-dimensional gather over the entire length in the longitudinal direction of the paper diaper or at least including the crotch portion. It is characterized by this.
[0008]
In the second invention, an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and a three-dimensional gather standing on the surface side is formed on both sides of the paper diaper. In the disposable paper diaper in which the side flap portion where the absorbent body does not exist is formed by the liquid-impervious backsheet extending outward from both side edges of the body and the liquid-permeable nonwoven fabric,
Oite to the side flaps, the liquid-impermeable back sheet, with a plurality of resilient and elastic members are arranged along the longitudinal direction of the disposable diaper between the liquid-impermeable nonwoven fabric, to the side flaps, A layer between the liquid-permeable nonwoven fabric and the liquid-impervious backsheet along the longitudinal direction of the paper diaper, overlapping the plurality of elastic elastic members, and being closer to the skin contact surface than the elastic elastic members A sweat absorbing sheet is interposed at the position .
[0009]
Further, the third invention is the liquid permeable article, wherein an absorbent body is interposed between the liquid permeable top sheet and the liquid impermeable back sheet, and extends outward from the edge of the absorbent body at front and rear end portions of the paper diaper. Disposable diaper in which an end flap portion without an absorbent body is formed by a permeable top sheet and a liquid-impermeable back sheet, and a waist gather is formed by an elastic elastic member having a predetermined width interposed in the end flap portion In
A sweat-absorbing sheet is affixed along the width direction of the paper diaper on an end flap region that is the surface of the end flap portion and overlaps with the elastic elastic member having the predetermined width .
[0010]
Further, the fourth aspect of the present invention is the liquid permeable material wherein an absorbent body is interposed between the liquid permeable top sheet and the liquid permeable back sheet, and extends outward from the side edges of the absorbent body at the front and rear end portions of the paper diaper. In a disposable paper diaper in which an end flap portion having no absorber is formed by a top sheet and a liquid-impermeable back sheet, and a waist gather is formed by interposing an elastic elastic member having a predetermined width in the end flap portion ,
It is between the liquid-permeable top sheet and the elastic elastic member along the width direction of the paper diaper with respect to the end flap portion, and overlaps with the elastic elastic member of the predetermined width and is in contact with the skin more than the elastic elastic member. A sweat-absorbing sheet is interposed at the layer position on the surface side .
[0011]
In the present invention described above, a sweat absorbing sheet is pasted on a portion that does not have a sweat absorbing function in spite of a portion that has been easily sweated, such as a side flap portion and an end flap portion. Since it absorbs quickly, it can suppress various symptoms caused by sweat such as sweat, eczema and rash.
[0012]
In the case of the first and third inventions, the sweat-absorbing sheet is a sheet material having a two-layer structure composed of an upper layer side sheet and a lower layer side sheet, and the upper layer sheet is made of polyethylene, polypropylene, or a composition mainly composed of these. Desirably, a non-woven sheet made of fibers or a porous plastic sheet is used, while a non-woven sheet made of recycled fibers such as rayon or cupra or a non-woven sheet made of natural fibers such as cotton is used for the lower layer side sheet. It is desirable to use non-woven fabric made of regenerated fiber or natural fiber that has relatively high water absorption and water retention capability as the material for absorbing sweat, but if these non-woven fabrics that absorb a lot of sweat continue to touch the skin, the wearer May feel uncomfortable and may cause sweats and rashes on the contrary, with polyethylene, polypropylene or a non-woven sheet or porous plastic sheet mainly composed of these, which have relatively poor water absorption and water retention. By covering the rayon nonwoven fabric and the like, the touch to the skin is improved, the feeling of stickiness to the skin is eliminated, and even if it absorbs a lot of sweat, as intended by the present invention, It can effectively prevent sweat, eczema and rash.
[0013]
In the second and fourth inventions, the liquid-permeable nonwoven fabric and the liquid-permeable top sheet on the surface side exhibit the same function as the upper-layer sheet. It is preferable to use a single-layer nonwoven fabric sheet made of a nonwoven fabric sheet made of fibers or a nonwoven fabric sheet made of natural fibers such as cotton.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partially broken development view of a disposable diaper according to the present invention, and FIG. 2 is an enlarged development view of a main part thereof. In the figure, the x mark is a symbol indicating an adhesion site.
[0015]
In FIG. 1, a paper diaper is made of cotton-like pulp or the like, for example, rectangular (or hourglass shape) between a liquid-impermeable back sheet 1 made of polyethylene or the like and a liquid-permeable top sheet 2 made of nonwoven fabric or the like. An absorber 3 having the following rigidity is interposed. The absorbent body 3 can be wrapped with absorbent paper (not shown) to maintain its shape. As the liquid-impervious backsheet 1, those having moisture permeability have been used in recent years from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there. As the liquid-permeable top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the raw material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.
[0016]
The liquid-impermeable back sheet 1 extends outward from the periphery of the absorbent body 3 to form a substantially hourglass shape, and the laterally extending portion is absorbed together with the side portion of the barrier sheet 4 described later. The side flap part SF which does not have a body is comprised. The liquid-permeable top sheet 2 has a rectangular shape slightly larger than the absorbent body 3, and a portion extending slightly outward from the side edge of the absorbent body 3 is between the barrier sheet 4 and the liquid-impermeable back sheet 1. And fixed by a hot melt adhesive or the like. As the material for forming the barrier sheet 4, a plastic sheet, a melt blown nonwoven fabric, or the like can be used. However, in terms of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used. .
[0017]
On the other hand, at the end in the longitudinal direction of the paper diaper, that is, the ventral side and the back side, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 extend together, and an end flap portion EF without the absorber 3 is formed, and foaming is performed. Elastic elastic bands 5 and 6 having a predetermined width made of urethane or the like are interposed, and fastening tapes 7 and 7 are provided at both ends on the back side.
[0018]
On both sides of the paper diaper, a pair of left and right three-dimensional gathers BK projecting toward the use surface side along the longitudinal direction is formed. As shown in detail in FIG. 2, the three-dimensional gather BK is configured by an inner sheet portion of the barrier sheet 4 provided to extend to the side flap portion SF corresponding to the liquid-impermeable back sheet 1. Therefore, a position slightly inward from the edge of the absorber 3 is set as an upright fixed end. The tip of the three-dimensional gather BK is double-folded with a predetermined width, and one (or a plurality) of elastic stretch members 9 are arranged inside the turn-up portion, so that the three-dimensional gather can be utilized using the stretch force. BK stands up.
[0019]
On the other hand, on the side flap SF existing outside the three-dimensional gather BK, a plurality of elastic stretch members, in this example, three elastic elastic members are provided along the longitudinal direction of the paper diaper between the barrier sheet 4 and the liquid-impermeable back sheet 1. 8, 8... Are fixed by a hot melt adhesive or the like, and a pleated flat gather GK is formed by the stretching force. As the elastic elastic members 8 and 9, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, and polyethylene that are usually used can be used.
[0020]
The three-dimensional gather BK abuts around the legs when worn, and forms a pocket space for containing urine or soft stool by a substantially trapezoidal space with an upper opening surrounded by the three-dimensional gather BK and the liquid-permeable top sheet 2. When urinating or defecation is made in this space, urine passes through the liquid-permeable top sheet 2 and is absorbed by the absorbent body 3, and the solid gathers BK cannot be overcome by the solid gathers BK as a barrier. Is prevented. Even if urine or defecation leaks over the three-dimensional gather BK, side leakage is prevented by the planar gather GK.
[0021]
With respect to such a paper diaper, in this example, on the surface side of the paper diaper and outside the standing fixed end of the three-dimensional gather BK, specifically, over the substantially entire length of the paper diaper in the longitudinal direction on the side flap portion SF. A leg sweat-absorbing sheet 10 is attached. The leg sweat-absorbing sheet 10 is preferably a two-layered sheet composed of an upper layer side sheet 10A and a lower layer side sheet 10B. The upper layer side sheet 10A is a nonwoven fabric made of polyethylene, polypropylene, or synthetic fibers mainly composed of these. A sheet or a porous plastic sheet is used, while a regenerated fiber nonwoven sheet such as rayon or cupra or a natural fiber nonwoven sheet such as cotton is used as the lower layer sheet 10B. By using a nonwoven fabric sheet made of rayon or the like that is relatively excellent in water absorption and water retention on the lower layer side sheet 10B, and by overlaying a nonwoven fabric sheet made of polyethylene or the like that is relatively inferior in water absorption on the upper layer side, a large amount of sweat is generated. Even when water has been absorbed, sweat that has permeated through the upper sheet 10A will be absorbed and retained by the lower sheet 10B, and the upper sheet 10A with low water absorption and low water retention will come into contact with the skin. As a result, the feeling of stickiness on the skin can be suppressed, and sweat absorbed by the lower layer sheet 10B can be prevented from being kept in direct contact with the skin in the state of stickiness, and sweat, eczema, rash, etc. can be prevented. It can be effectively prevented. Furthermore, if an embossed pattern such as a mesh shape is provided on the surface of the upper layer side sheet 10A, the contact area with the skin can be reduced, and the touch to the skin becomes better. In addition, a nonwoven fabric sheet can also be used by a single layer under the conditions that the water retention ability of the leg | piece part sweat absorbing sheet 10 to be used is high enough.
[0022]
By the way, in the example of illustration, although the arrangement | positioning site | part of the leg part sweat absorbing sheet 10 was made on the side flap part SF, if it is outside a standing fixed end so that standing of a solid gather BK may not be inhibited, the absorber 3 side You may make it arrange | position in the area | region ranging from a part to side flap part SF. The leg sweat-absorbing sheet 10 is disposed over the entire length of the paper diaper. However, the leg sweat-absorbing sheet 10 may be partially disposed within a range including at least the crotch portion (an intermediate predetermined range).
[0023]
On the other hand, since the barrier sheet 4 subjected to the water-repellent treatment is used in the above example, the leg sweat-absorbing sheet 10 is pasted on the upper surface of the side flap portion SF, but as shown in FIG. Between the barrier sheet 4 and the liquid-impermeable back sheet 1, a single layer sheet 10C for sweat absorption made of a nonwoven fabric sheet made of recycled fibers such as rayon or cupra or a nonwoven fabric sheet made of natural fibers such as cotton can be interposed. . In this case, since it is necessary to permeate the barrier sheet 4 to absorb the sweat, a liquid-permeable nonwoven fabric that has not been subjected to water repellent treatment is used as the barrier sheet 4 or the three-dimensional gathered BK portion leaks. A water repellent treatment may be performed to ensure prevention, and the side flap portion SF may be made of a liquid permeable non-woven fabric without performing the water repellent treatment. The barrier sheet 4 covering the single layer sheet for sweat absorption 10C has just assumed the function of the upper layer side sheet 10A described above, and the feeling of stickiness to the skin can be suppressed, and the absorbed sweat can be absorbed into the skin. Prevent direct contact in a sticky state.
[0024]
On the other hand, in the present paper diaper, also in the end flap portion EF, a waist sweat absorbing sheet 10D is stuck on the surface along the width direction of the paper diaper. In the example of FIG. 1, it is attached to the section sandwiched between the leg sweat-absorbing sheets 10 and 10 disposed on both sides, but as shown in FIG. The edge may be stopped in front of the end of the paper diaper, and the waist sweat absorbing sheet 10D may be disposed over almost the entire width of the paper diaper. In addition, the lower-layer sweat-absorbing sheet 10D is similar to the sweat-absorbing sheet 10 disposed on the legs, and an upper-layer sheet 10A made of a nonwoven fabric sheet or a porous plastic sheet made of polyethylene, polypropylene, or a synthetic fiber mainly composed of these, and a rayon Or it is good to use the two-layer structure sheet | seat of the lower layer side sheet | seat 10B which consists of a nonwoven fabric sheet by regenerated fibers, such as a cupra, or a nonwoven fabric sheet by natural fibers, such as cotton.
[0025]
Also in this end flap portion EF, a single layer sheet for sweat absorption may be interposed between the liquid-permeable top sheet 2 and the elastic elastic band 6. In the end flap portion EF, since the liquid-permeable top sheet 2 on the surface side is inherently liquid-permeable, it is simply a non-woven sheet made of recycled fibers such as rayon or cupra, or a non-woven sheet made of natural fibers such as cotton. A single layer sheet for sweat absorption made of may be interposed.
[0026]
As described above, in the present embodiment, the tape fixing type paper diaper has been described as an example, but the present invention can be applied to a pants type paper diaper in exactly the same manner.
[0027]
【The invention's effect】
As described above, according to the present invention, it is possible to effectively prevent skin symptoms such as rash, eczema and rash caused by the contact of the sweat worn by the wearer with the skin for a long time.
[Brief description of the drawings]
FIG. 1 is a partially broken development view of a disposable diaper according to the present invention.
FIG. 2 is an enlarged development view of a main part thereof.
FIG. 3 is a cross-sectional view (a view taken along the line III-III in FIG. 1) at the center position of the disposable diaper.
FIG. 4 is a modification of the arrangement of the leg sweat-absorbing sheet 10;
FIG. 5 is a cross-sectional view of the end flap EF portion (a view taken along line VV in FIG. 1).
FIG. 6 is a modified example of an arrangement mode of a waist sweat-absorbing sheet 10D.
FIG. 7 is an enlarged development view of a main part of a conventional paper diaper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 4 ... Barrier sheet, 5 * 6 ... Elastic elastic band, 7 ... Fastening tape, 8 * 9 ... Elastic elastic member, 10 ... Leg sweat-absorbing sheet, 10A ... upper layer sheet, 10B ... lower layer sheet, 10C ... sweat-absorbing single-layer sheet, 10D ... waist sweat-absorbing sheet, BK ... solid gathers, SF ... side flaps, GK ... flat gathers

Claims (6)

An absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and a three-dimensional gather standing on the surface side by a water-repellent nonwoven fabric or a plastic sheet is formed on both sides of the paper diaper. In the disposable paper diaper in which the side flap portion where the absorber does not exist is formed by the liquid-impervious backsheet extending outward from both side edges of the absorber, and the water-repellent nonwoven fabric or the plastic sheet,
A plurality of elastic elastic members are disposed along the longitudinal direction of the paper diaper between the liquid impervious backsheet and the water repellent nonwoven fabric or plastic sheet on the side flap, and on the surface side of the paper diaper. And the sheet for sweat absorption was stuck to the side flap area which overlaps with the plurality of elastic elastic members of the part outside the standing fixed end of the three-dimensional gather over the range including almost the entire length in the longitudinal direction of the disposable diaper or at least the crotch part. A disposable paper diaper characterized by that. An absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and a three-dimensional gather standing on the surface side is formed on both sides of the paper diaper. In the disposable paper diaper in which the side flap portion where the absorbent does not exist is formed by the liquid-impermeable back sheet extending outward and the liquid-permeable nonwoven fabric,
Oite to the side flaps, the liquid-impermeable back sheet, with a plurality of resilient and elastic members are arranged along the longitudinal direction of the disposable diaper between the liquid-impermeable nonwoven fabric, to the side flaps, A layer between the liquid-permeable nonwoven fabric and the liquid-impervious backsheet along the longitudinal direction of the paper diaper, overlapping the plurality of elastic elastic members, and being closer to the skin contact surface than the elastic elastic members A disposable paper diaper characterized by interposing a sweat-absorbing sheet at the position . An absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and the liquid-permeable top sheet and the liquid-impervious top sheet that extend outward from the edge of the absorbent body at the front and rear end portions of the paper diaper. In the disposable paper diaper in which the end flap portion where the absorbent body does not exist is formed by the liquid back sheet, and the waist gather is formed by interposing an elastic elastic member having a predetermined width in the end flap portion,
A disposable paper diaper characterized in that a sheet for sweat absorption is pasted along the width direction of the paper diaper in an end flap region which is a surface of the end flap portion and overlaps with the elastic elastic member having a predetermined width . The liquid-permeable top sheet and the liquid-impervious liquid, wherein an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, and the front and rear ends of the paper diaper extend outward from the side edges of the absorbent body. In the disposable paper diaper in which the end flap part where the absorbent body does not exist is formed by the conductive back sheet, and the waist gather is formed by interposing an elastic elastic member of a predetermined width in the end flap part,
It is between the liquid-permeable top sheet and the elastic elastic member along the width direction of the paper diaper with respect to the end flap portion, and overlaps with the elastic elastic member of the predetermined width and is in contact with the skin more than the elastic elastic member. A disposable paper diaper characterized by interposing a sweat-absorbing sheet at a layer position on the surface side . The sweat-absorbing sheet is a two-layered sheet material composed of an upper layer side sheet and a lower layer side sheet, and the upper layer side sheet is made of a nonwoven fabric sheet or a porous plastic sheet made of polyethylene, polypropylene or synthetic fibers mainly composed of these. The disposable paper diaper according to any one of claims 1 and 3, wherein the lower layer side sheet is a nonwoven fabric sheet made of recycled fibers such as rayon or cupra or a nonwoven fabric sheet made of natural fibers such as cotton. The disposable paper diaper according to any one of claims 2 and 4, wherein the sweat-absorbing sheet is a single-layer nonwoven fabric sheet comprising a nonwoven fabric sheet made of recycled fibers such as rayon or cupra, or a nonwoven fabric sheet made of natural fibers such as cotton.

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