JPH08280736A - Diaper - Google Patents

Abstract

PURPOSE: To improve the fitness in the apertures around the legs and to prevent leakage by arraying and disposing plural wire-shaped materials constituting the elastic members around the legs at approximately equal intervals without overlaps over the entire length along the openings around the legs. CONSTITUTION: The elastic members 18 around the legs for forming leg gathers by drawing the openings around the legs are formed of plural pieces of the wire-shaped materials and are joined in an elongated state between the back sheet and a pair of the right and left side top sheets 21 along the apertures around the legs in such a manner that the spacings of the wire-shaped materials adjacent to each other along the entire length thereof. In such a case, the spacings between the elastic members 18 around the legs are preferably in a range of about 10 to 20mm. The sure leakage prevention is attained by disposing respectively three pieces each of yarn rubber having a diameter of about 0.4mm at intervals of about 4mm in a leadless state, by which the feel of fit is well maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaper capable of forming leg gathers with less pressure on the leg openings.

[0002]

2. Description of the Related Art A removable diaper having a waist opening corresponding to the waist and left and right leg openings corresponding to the thighs of both legs, and the left and right side flaps before this are closed. All of the deployable (pants-type) diapers that are worn together have an absorbent body interposed between a liquid-impermeable back sheet and a liquid-permeable top sheet to improve the fit of the opening. At the same time, in order to improve the overall feeling of wearing, elastic materials tend to be used frequently.

For example, in order to form the leg gathers by squeezing the left and right leg openings, the leg elastic members are interposed between the back sheet and the top sheet along the leg openings, and the leg openings are formed. It has been devised to improve the fit of the part, and is well known in, for example, JP-A-4-122257, JP-A-4-317649, or JP-A-4-317650.

Usually, the leg elastic member meanders a plurality of mutually parallel linear members meandering in an S-shape on both sides in the width direction between a continuous backsheet and a continuous topsheet. The leg feeding elastic member feeding device held by the traverser is reciprocated in the width direction in association with the conveying operation of the sheet continuum.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
No. 7 and Japanese Patent Application Laid-Open No. 4-317649 disclose that a plurality of linear members forming the leg elastic member are arranged at the center of the length of the linear members. It is the widest and is gradually narrowed from the central part to both ends. Further, in the one disclosed in JP-A-4-317650, the arrangement interval of the linear members is the narrowest in the crotch part. Is predetermined depending on the orientation of the feeding device for the leg elastic members held by the traverser.

As described above, in the conventional diaper, the arrangement interval of the plurality of linear members forming the leg elastic member is not constant over the entire length thereof, and the arrangement interval of the linear members becomes wide,
The compression area has a tendency to disperse, and conversely, when the arrangement interval of the linear members becomes narrow, the compression area has a tendency to concentrate. Here, if the design is based on a location where the linear material arrangement interval is wide, these may overlap at the portion where the linear material arrangement interval becomes narrow, so that the compression area is locally concentrated, and as a result, it is not suitable for the wearer. It will give a pleasant feeling. On the other hand, if the design is based on the location where the linear material array spacing is narrow, the spacing between the adjacent linear material will be too wide in the part where the linear material array spacing is wide, and the fitability will deteriorate and leakage will occur. There is a possibility that it will be difficult to prevent.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a diaper which eliminates a local compression area in the leg opening, enhances the fit of the leg opening, prevents leakage, and is comfortable to wear. Especially.

[0008]

The first aspect of the present invention is as follows.
Form waist opening and left and right leg openings,
And a liquid-permeable top sheet and a liquid-impermeable back sheet that are superposed on each other, and an absorber that is provided between the top sheet and the back sheet that are located between the left and right leg openings. A removable diaper that is provided between the top sheet and the back sheet along the leg openings and that has leg elastic members that squeeze the leg openings, respectively. The member is a removable diaper characterized in that the members are each formed of a plurality of linear members arranged at substantially equal intervals without overlapping each other over the entire length thereof.

A second aspect of the present invention is to provide a liquid-permeable top sheet, a liquid-impermeable back sheet, and the top sheet and the back sheet provided between the top sheet and the back sheet. An absorber located at the center in the width direction, and side flap portions formed on the top sheet and the back sheet located at both ends in the longitudinal direction of the absorber and extending to the outside in the width direction of the absorber, respectively. , By overlapping the tip end portion of the side flap portion on one end side in the longitudinal direction of the absorber and the tip end portion of the side flap portion on the other end side with each other, a waist circumference opening portion and left and right leg circumference opening portions are formed. And a leg elastic member for squeezing each of the leg openings is disposed between the top sheet and the back sheet along the leg openings. In the mold diaper, the elastic members around the legs are each formed of a plurality of linear members that are arranged at substantially equal intervals without overlapping each other over the entire length thereof. It is in.

Here, the plurality of linear members are 2 to 10
It is preferable that the linear members are arranged at substantially equal intervals at an interval of mm, and the interval between the linear members located at both ends along the arrangement direction is in the range of 10 to 20 mm.

[0011]

According to the present invention, the plurality of linear members forming the leg elastic member are arranged along the leg opening of the diaper at substantially equal intervals along the entire leg opening without overlapping. There is no local compression area over the entire circumference of the surrounding opening, and this compression force is evenly distributed.

When the interval between the plurality of linear members is set to less than 2 mm, the linear members adjacent to each other may overlap each other due to manufacturing error or the like, and the compressed area may be concentrated.
On the other hand, when the distance between the linear members exceeds 10 mm, the number of the linear members is small, and the desired fit and leakage prevention effect cannot be obtained.

Further, if the distance between the linear members located at both ends along the arrangement direction of the linear members is less than 10 mm, the compressed area may be concentrated. Similarly, when the distance between the linear members located on both ends along the arrangement direction of the linear members exceeds 20 mm, the leg gathers are slid up when the diaper is worn, and the adjacent linear members are There is a possibility that the compression areas may be concentrated due to overlapping with each other.

[0014]

EXAMPLE FIG. 1 showing the appearance and FIG. 2 showing the developed planar shape and III-III thereof showing an example applied to a diaper for putting on a diaper according to the present invention.
This will be described in detail with reference to FIG. 3 showing a sectional structure taken along the arrow.

That is, the snap-on type diaper 11 according to the present embodiment has a waist opening 12 corresponding to the waist portion, a pair of leg openings 13 corresponding to the thighs of both legs, and a liquid permeability described later. Liquid impermeable backsheet 14 forming these openings 12 and 13 together with the top sheet of FIG. 1 and waist elastic member 1 for forming waist gathers 15 by narrowing the waist opening 12
6, a leg elastic member 18 for forming the leg gathers 17 by squeezing the leg opening 13, and the leg opening 1
The absorbent body 19 extends from the crotch portion between 3 to the ventral side and the butt side, respectively. Further, the back sheet 14 is joined so as to be deployable as shown in FIG. 2 by peeling off the joining flap portion 20 located on the flank portion thereof.

That is, the joining flap portions 20 before and after the back sheet 14 are overlapped from the unfolded state shown in FIG. 2, and these abutting portions are joined by a hot melt bonding method, a pressure melting bonding method, or an ultrasonic melting bonding method. The flexible diaper 11 shown in FIG. 1 can be obtained by bonding these and the like alone or in combination as appropriate.

The absorber 19 is arranged at the center of the back sheet 14 in the width direction. In addition, a pair of left and right side top sheets 2 are provided at both end portions in the width direction of the absorber 19.
The width-direction inner end sides of 1 are overlapped, and the width-direction outer ends of these side topsheets 21 are joined to the backsheet 14. Further, the widthwise inner ends of the side topsheets 21 are integrally joined to both widthwise ends of the center topsheet 22 that is superposed on the absorbent body 19, and the sidetopsheet 21 and the center topsheet 22 form a book. The inventive topsheet is constructed.

Both ends in the width direction of the center top sheet 22 are inner flaps 23 for forming a three-dimensional gather. And the center top sheet 2
The both ends in the width direction of 2 are folded back, and the elastic member 24 capable of expanding and contracting is wound in the stretched state, and the inner flap 23
The front end of the is contracted along its longitudinal direction so as to be in close contact with the wearer's skin.

The leg elastic member 18 for forming the leg gathers 17 is formed of a plurality of linear members,
Along the leg openings 13, the backsheet 14 and the pair of left and right side topsheets 21 are joined in an extended state so that the intervals between the adjacent linear members are substantially equal over their entire length. However, here, when the distance between the leg elastic members 18 is set to be less than 2 mm, the leg elastic members 18 adjacent to each other may overlap each other due to a manufacturing error or the like, and there is a possibility that the compression region is concentrated. On the other hand, when the distance between the leg elastic members 18 exceeds 10 mm, the number of leg elastic members 18 decreases, and a predetermined fit and leakage prevention effect cannot be obtained. In addition, the distance between the leg elastic members 18 located on both ends along the arrangement direction is 10 mm.
If it is less than the range, there is a possibility that the compression area may be concentrated. Similarly, when the distance between the leg elastic members 18 located on both ends along the arrangement direction exceeds 20 mm,
When the diaper is worn, the leg gathers 17 may slide up, and adjacent leg elastic members 18 may overlap with each other to concentrate the compression area.

Therefore, the elastic members 18 around the legs are
It is preferable that the leg elastic members 18 located at both ends along the arrangement direction are arranged at an interval of 2 to 10 mm at substantially equal intervals, and the interval between the leg elastic members 18 is in the range of 10 to 20 mm. In the present embodiment, no load is applied. In this state, three rubber threads each having a diameter of 0.4 mm are arranged at intervals of 4 mm, so as to ensure leakage prevention and to maintain a good fit feeling. However, when a tape-shaped member having a width of about 2 to 3 mm is used as the leg elastic members 18, the intervals between the leg elastic members 18 are set to 4 to 4 so that adjacent leg elastic members 18 do not overlap each other due to manufacturing errors or the like. It is preferably set to 5 mm or more.

Similarly, the waist elastic member 16 for forming the waist gathers 15 is joined along the waist opening 12 between the backsheet 14 and the side topsheet 21 and the center topsheet 22 in an extended state. Has been done.

Here, as the back sheet 14,
A liquid impermeable polyethylene sheet or the like can be used. More preferably, 20 to 20 are provided with a large number of fine pores that do not allow liquid molecules to pass therethrough to prevent stuffiness.
A polyethylene sheet with a thickness of about 40 μm, a moisture-permeable liquid impermeable sheet obtained by adding a filler to a thermoplastic resin and stretching, or a composite sheet obtained by laminating a nonwoven fabric on the outside of these sheets is used in the diaper. Since excess water is released to the outside of the diaper, stuffiness and rashes are less likely to occur, and it is possible to make it more comfortable in terms of moisture permeability and touch.

Further, the absorbent body 19 is preferably made of fluff pulp as a main material together with a super-absorbent polymer. In addition, absorbent paper alone or a mixture or laminate of heat-sealing fibers is used. Further, it is preferable that a super absorbent polymer is mixed or laminated between upper and lower layered fluff pulp to have a laminated structure in which the whole is wrapped with a tissue, and the shape of the absorber 19 may be an hourglass shape or a rectangular shape. , The hourglass type provides better fit.

As the side top sheet 21, a nonwoven fabric of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin is used. The side top sheet 21 is preferably water repellent. It may be liquid impermeable by laminating a film made of a thermoplastic resin on a non-woven fabric.

Further, as the center top sheet 22, a liquid permeable non-woven sheet of synthetic fiber made of polyethylene, polypropylene, polyester or other thermoplastic resin is used, but the inner flap 23 forming the three-dimensional gathers leaks. To enhance the prevention effect,
It is more preferable that only the both end portions of the center top sheet 22 that will be the inner flaps 23 be processed to have water repellency.

Further, a plurality of linear members forming the waist elastic member 16 provided along the waist opening 12 and the leg elastic member 18 provided along the leg opening 13, or a three-dimensional gather. As the elastic member 24 for forming the, it is possible to use urethane thread, urethane tape, thread rubber or the like as they are, and these are provided at predetermined positions of the back sheet 14 and the center top sheet 22 with a spiral spray or a curtain coater. The adhesive is fixed in a stretched state along the hot melt adhesive applied intermittently.

Accordingly, by disposing a plurality of linear members constituting the leg elastic member 18 along the leg opening 13 at substantially constant intervals over the entire length thereof, a local compression region is provided. It can be eliminated altogether, and the area of the specified area along the leg area will fit closely to the wearer's leg area, minimizing leakage from the leg area and maintaining good fit. it can.

In the above-mentioned embodiments, the diaper which can be detached is described, but the present invention can be applied to a development type (pants type) diaper.

The appearance of another embodiment according to the present invention is shown in FIG. 4 and its plan view is shown in FIG. 5. Members having the same functions as those of the previous embodiment are designated by the same reference numerals. The explanation is omitted here. That is, the deployable diaper 31 in the present embodiment includes a center topsheet 22 forming a liquid-permeable topsheet, side topsheets 21 joined to the left and right ends of the center topsheet 22 in the width direction, and the center topsheets. A liquid impermeable back sheet 14 that is superposed on the sheet 22 and the side top sheet 21, an absorber 19 provided between the back sheet 14 and the center top sheet 22, and the absorber 19 sandwiched between the back sheet 14 and the center top sheet 22. A pair of constricted portions 32, which are formed in a semi-arcuate shape on both sides of the side top sheet 21 and the back sheet 14 in the width direction and form the leg openings 13 when worn, and a center top on one end side in the longitudinal direction of the absorber 19. When sandwiched between the seat 22 and the side top seat 21 and the back seat 14 and worn It is sandwiched between a waist elastic member 16 for forming a waist gather 15 that becomes the waist opening 12, and a center topsheet 22 and side topsheets 21 and backsheet 14 on both sides in the width direction of the absorbent body 19, A leg elastic member 18 for forming leg gathers 17 that become the leg openings 13 when worn.

In this case, the waist elastic member 16 is
Plural pieces (three pieces in the illustrated example) that are formed only on one end side in the longitudinal direction of the absorber 19 and that constitute the leg elastic members 18
The linear members are arranged in an arc shape along the constricted portion 32 so as to have a constant interval over the entire length. Further, the side top sheet 21 and the back sheet 14 located on both ends in the longitudinal direction of the absorbent body 19 are formed with side flap portions 33 extending outward in the width direction of the absorbent body 19, and the side flap portions on one end side are formed. A pair of left and right adhesive tapes 34 for overlapping and connecting the side flap portions 33 on the other end side to the side flap portions 33 on the other end side are mounted together with the base tape 35 on both sides in the width direction of 33.

The sectional structure along this absorber 19 is shown in FIG.
Is exactly the same as the embodiment shown in FIG.
By arranging a plurality of linear members constituting the above in a circular arc shape along the constricted portion 32 so as to have a constant interval over the entire length thereof, the same effect as that of the previous embodiment can be obtained. it can.

When a plurality of linear members forming the leg-surrounding elastic member 18 are arranged in an arc shape so as to have a constant interval over the entire length thereof, for example, these linear members are held. The head of the traverser is pivotally supported on the conveyance surface of the continuous body of the belt-shaped backsheet 14 so as to be pivotable, and when the traverser is moved along the width direction of the continuum of the backsheet 14, the conveyance of the backsheet 14 is performed. By rotating the head of the traverser in accordance with the inclination of the linear member with respect to the direction, a plurality of linear members that form the leg elastic member 18 are
They can be arranged in an arc shape so that they are spaced at regular intervals over their entire length.

[0033]

According to the diaper of the present invention, the elastic members around the legs of the removable diaper and the deployable diaper are formed into a plurality of linear members which are arranged at substantially equal intervals without overlapping each other over their entire length. Since there is no local compression area over the entire circumference of the leg opening, this compression force is evenly distributed, and it is possible to eliminate the local compression area at all. A region having a predetermined area along the circumference of the wearer fits around the wearer's leg moderately, leakage from the circumference of the leg can be minimized, and good fit can be maintained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment applied to a diaper for putting on a diaper according to the present invention.

FIG. 2 is a plan view showing a state in which the joining flap portion of the snap-on type diaper shown in FIG. 1 is peeled off and developed into a flat plate shape.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view showing an appearance of an embodiment in which the diaper according to the present invention is applied to a developed type, that is, a pants type diaper in a worn state.

FIG. 5 is a plan view of the pants-type diaper shown in FIG. 4 in an unfolded state.

[Explanation of symbols]

 11 Wearable Diaper 12 Waist Around Opening 13 Leg Around Opening 14 Back Sheet 15 Waist Gather 16 Waist Around Elastic Member 17 Leg Gather 18 Leg Around Elastic Member 19 Absorber 20 Joint Flap 21 Side Top Sheet 22 Center Top Sheet 23 Inner flap 24 Elastic member 31 Expandable diaper 32 Neck portion 33 Side flap portion 34 Adhesive tape 35 Base tape

Claims (2)

[Claims] 1. A liquid-permeable top sheet and a liquid-impermeable back sheet, which form a waist opening and left and right leg openings, and are superposed on each other, and the left and right leg openings. An absorber provided between the top sheet and the back sheet positioned between the top sheet and the back sheet along the leg opening, and the leg opening. In a snap-on type diaper including elastic members around the legs, the elastic members around the legs are each formed of a plurality of linear members arranged at substantially equal intervals without overlapping each other over the entire length thereof. A disposable diaper characterized by being formed. 2. A liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent sheet which is provided between the topsheet and the backsheet and which is located in the widthwise central portion of the topsheet and the backsheet. A body and side flaps formed on the top sheet and the back sheet located at both longitudinal ends of the absorbent body and extending outward in the widthwise direction of the absorbent body, respectively, one longitudinal end side of the absorbent body By overlapping the tip end of the side flap portion and the tip end of the side flap portion on the other end side with each other, a waist opening and left and right leg openings are formed. In the deployable diaper, in which elastic members around the legs for squeezing are arranged between the top sheet and the back sheet along the openings around the legs, Ri elastic member, the Kassel type diaper, characterized in that it is formed respectively by a plurality of linear members arranged at substantially regular intervals without overlapping one another over its entire length.