JP4540215B2 - Disposable pants and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable pant with a devised joint structure at both side edges.
[0002]
[Prior art]
As shown to Fig.7 (a), as for the general disposable pants 1, the sheet | seat laminated body 3 containing the absorber 2 is folded in two back and front, the both-side edge part 3a is joined, respectively, and waist opening part 4 and A pair of leg openings 5 are formed, and rubber elastic elastic yarns 6a and 6b are provided around the openings 4 and 5, thereby forming a waist gather and a leg gather. Become so.
[0003]
[Problems to be solved by the invention]
In the disposable pants 1 as described above, as shown in FIGS. 7 (a) and 7 (b), both side edge portions 3a of the sheet laminate 3 are protruded outward and joined by heat sealing or the like. However, since both side edges 3a are in the outward projecting state, there is a problem that the appearance is impaired and the touch is also bad.
[0004]
Moreover, as shown in FIG.7 (c), although there exist some which make both the side edge parts 3a of the sheet | seat laminated body 3 protrude inward, and it joins by heat seal etc., both side edge parts 3a are inward protruding states Therefore, both side edges 3a have a feeling of jerking, and when such disposable pants 1 are worn for a long time, both side edges 3a projecting inward hit the skin and hurt, causing discomfort. There is a problem that the texture and wearing feeling are bad.
[0005]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problems, and provides a disposable pant in which the joint structure of both side edges is devised so that the appearance, touch, texture, and wearing feeling are all good. It is the purpose.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is such that a sheet laminate including an absorber is folded back and forth, and both side edges are joined to form a waist opening and a pair of leg openings. Disposable pants,
The side edges are folded inward, the outer surfaces of the folding bases are joined to each other, and the folded portions are folded back in the front-rear direction. Disposable pants characterized by being bonded to the inner surface of a sheet laminate, respectively.
[0007]
According to the present invention, when joining the side edges of the sheet laminate that is folded back and forth, the side edges are folded inward, and the outer surfaces of the fold bases are joined to each other. In addition to securing the peel resistance in the direction, each folded portion is folded back in the front-rear direction, and the inner surface on the front end side of each folded portion is joined to the inner surface of the sheet laminate, so that each folded portion becomes flat on the inner surface of the pants. Come along.
[0008]
Upper Symbol sheet laminate is made in the skin surface side sheet and the outer surface side sheet having air permeability, the absorbent body, between the liquid-permeable topsheet, a liquid-impermeable back sheet, the superabsorbent It is preferable that an absorbent core having a thin sheet shape, which is mainly composed of a polymer and fixed on a non-woven fabric base material, is interposed, and the back sheet is bonded and fixed to the upper surface of the skin side sheet.
[0009]
Upper Symbol bonding are preferably bonded by bonding and / or heat-sealing by a hot melt adhesive.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
1 (a) is a perspective view of a disposable pant, FIG. 1 (b) is an enlarged cross-sectional view taken along line AA of FIG. 1 (a), and FIGS. 2 (a) and 2 (b) are partial enlarged cross-sectional views of the joining structure. 3 (a) to 3 (c) are exploded sectional views of the joining procedure, FIG. 4 is a front view of the unfolded state, and FIG. 5 is an exploded perspective view.
[0012]
As shown in FIGS. 4 and 5, the disposable pants 11 are basically configured by a sheet laminated body 16 including an outer surface side sheet 12 and a skin surface side sheet 13 and an absorbent body 14.
[0013]
The outer surface side sheet 12 is liquid permeable or liquid impermeable due to water repellency, the skin surface side sheet 13 is liquid permeable, and both the sheets 12 and 13 are at least breathable synthetic fiber nonwoven fabrics. It is formed in a pants shape. Note that both the outer surface side sheet 12 and the skin surface side sheet may be a synthetic resin film having air permeability.
[0014]
In both the sheets 12, 13, leg openings S are formed on both sides of the crotch R between the front abdomen (front body) P and the back part (rear body) Q, respectively. A waist opening T (see FIG. 1) is formed at the upper part between the back portion Q and the back portion Q.
[0015]
A plurality of waist elastic yarns 15a are attached to the upper surface of the front abdominal part P and the back part Q of the outer surface side sheet 12 in an expanded state in the width direction, and along the periphery of each leg opening S. A plurality of leg elastic yarns 15b are attached in a stretched state in the length direction. The waist elastic yarn 15a is attached to the front abdomen P and the back portion Q, and the leg elastic yarn 15b is attached to the leg opening S in a stretched state with a plurality of elastic yarns arranged in parallel. By fixing a long stretchable material (ribbon-like elastic band) sandwiched and fixed from a lower surface with a cloth such as a nonwoven fabric to each of the above parts, each part can be made into a stretchable gather shape. Further, unlike the case where the ribbon-like elastic band is used, it is a matter of course that a leg elastic yarn 15b is guided and fixed in a sine curve shape on the outer sheet 12 to form a stretchable gather in the leg opening S. Can be adopted. In the case of this method, the leg elastic yarn 15b is attached so as to cross the crotch portion R while being stretched in the width direction, and after this attachment, only the leg elastic yarn 15b of the crotch portion R is cut by a cutter. Thus, it is preferable that the contraction force does not act on the crotch portion R. Each of the elastic yarns 15a and 15b is made of a natural rubber or synthetic rubber having a band shape or a thread shape. It should be noted that a plurality of body-fit elastic yarns may be attached to the upper surfaces of the front abdominal part P and the back part Q of the outer surface side sheet 12 in an expanded state in the width direction.
[0016]
The skin surface side sheet 13 has the same outer shape as the outer surface side sheet 12, but the length is formed to be shorter than the outer surface side sheet 12, and the outer surface side is sandwiched between the leg elastic yarns 15b. Bonded to the sheet 12.
[0017]
The waist elastic yarn 15a is bonded in a state of being sandwiched between the folded portions 12a at the front and rear end portions of the outer surface side sheet 12.
[0018]
The absorbent core 14a of the absorbent body 14 has a thin sheet shape mainly composed of a superabsorbent polymer and fixed on a non-woven fabric substrate. The upper surface of the absorbent core 14a is covered with a liquid-permeable top sheet 14b and the lower surface is improper. The structure is covered with the liquid-permeable back sheet 14c and the peripheral edge thereof is sealed (see Japanese Patent Application No. 2000-175663). As for this absorber 14, the back sheet 14c is being fixed to the upper surface of the skin surface side sheet | seat 13. As shown in FIG. The absorbent core 14a may be formed by mixing or laminating natural pulp fibers, synthetic resin fibers, superabsorbent resin materials, and the like into a flat hourglass shape and the outer periphery being wrapped with thin paper. In addition, you may fix the absorber 14 between the outer surface side sheet | seat 12 and the skin surface side sheet | seat 13 (diaper type).
[0019]
The folded-back portions 12a at the front and rear end portions of the outer surface side sheet 12 are bonded to the upper surface of the top sheet 14b of the absorbent body 14 at the absorber 14 portion, and at the skin surface side sheet 13 portion of the skin surface side sheet 13. Adheres to the top surface.
[0020]
Then, the sheet laminate 16 including the absorber 14 is folded back and forth with the crotch portion R as a boundary, and the both side edges 16a of the front abdomen P and the back part Q are joined as described below. 1 is assembled in the use state of FIG.
[0021]
As shown in FIG. 2 (a), the front abdomen P and the back edge Q are joined to both side edges 16a by folding the front abdomen P and the side edges 16a of the back part Q inward, respectively. The outer surface side sheets 12 which are the outer surfaces of 16b are mutually joined by the hot-melt-adhesive (or heat seal) a in the vertical direction. Thereby, the lateral peel resistance of the disposable pants 11 is ensured.
[0022]
Next, each folded portion is folded back and forth (see arrow c), and the skin surface side sheet 13 that is the inner surface on the front end side of each folded portion 16c is replaced with the skin surface side sheet 13 that is the inner surface of the sheet laminate 16 respectively. It joins in the vertical direction with a hot-melt adhesive (or heat seal) b (see FIG. 1B and FIG. 2B). Thereby, each folding | turning part 16c comes to follow a pants inner surface flatly. An appropriate peeling resistance in the lateral direction of the disposable pants 11 is about 0.2 to 0.8 Kg / cm.
[0023]
In the disposable pants 11 configured as described above, the side edges 16a do not protrude outward, the appearance and the touch are good, and the side edges 16a do not protrude inward. No longer feels uncomfortable even when worn for a long time, and the texture and feeling of wearing are improved.
[0024]
It is practical to join the side edges 16a of the front abdomen P and the back part Q as shown in FIG. That is, when the sheet laminate 16 is folded back and forth with the crotch portion R as a boundary, as shown in FIG. 3A, the skin surface side sheet 13 is on the outer side and the outer surface side sheet 12 is on the inner side. The sheet is folded in half, and the outer side sheets 12 to be the folding base portions 16b of the side edges 16a of the sheet laminate 16 are joined to each other in the longitudinal direction with the hot melt adhesive a, and then as shown in FIG. The both side edges 16a are folded outward (see arrow c), and the skin side sheet 13 of the folded side edges 16a is joined to the skin side sheet 13 in the longitudinal direction with the hot melt adhesive b, respectively. As shown in FIG. 3C, the skin surface side sheet 13 may be turned inside and the outer surface side sheet 12 may be turned outside.
[0025]
In the above embodiment, the joining of the side edges 16a of the front abdomen P and the back part Q is performed with the hot melt adhesives a and b. However, in the case of joining by heat sealing, both sides of the front part P and the back part Q are performed. As shown in FIG. 6 (a), the edges 16a are joined by folding the side edges 16a of the front abdomen P and the back part Q inward, and the outer side sheets 12 that are the outer surfaces of the respective folding bases 16b. Are joined to each other in the longitudinal direction by a heat seal a. In this case, in order to ensure about 0.2 to 0.8 Kg / cm as the lateral peel resistance of the disposable pants 11, the bonding width W should be about 2 to 10 mm, and if it is less than 2 mm, the peel resistance When the thickness exceeds 10 mm, the hardness of the joint increases and the touch becomes worse.
[0026]
Next, the portion of the heat seal a is folded in the direction of the back portion Q together with the folded portion on the back portion Q side (see arrow c), and as shown in FIG. 6B, the tip of the folded portion 16c on the back portion Q side. The skin side sheet 13 which is the side inner surface is joined to the skin side sheet 13 which is the inner surface of the sheet laminate 16 in the vertical direction by the hot melt adhesive b, and the front side inner surface of the folded portion 16c on the front abdomen P side The skin surface side sheet 13 is joined to the skin surface side sheet 13 which is the inner surface of the sheet laminate 16 in the vertical direction by the hot melt adhesive b. Thereby, each folding | turning part 16c comes to follow a pants inner surface flatly. The heat seal a may be folded back in the direction of the front abdomen P.
[0027]
Each of the junctions need not be a continuous line, and may be an intermittent line, or a combination of dots in the length direction, horizontal lines, and diagonal lines.
[0028]
【The invention's effect】
As is clear from the above description, the present invention has both sides of the pants that are flat along the inner surface of the pants. Since both side edges do not protrude inward, there is no feeling of stubbornness, no discomfort occurs even when worn for a long time, and the texture and wearing feeling are also improved.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a disposable pant according to the present invention, in which (a) is a perspective view and (b) is a cross-sectional view corresponding to line AA in (a).
FIGS. 2A and 2B are partially enlarged cross-sectional views of a joint structure at both side edges. FIGS.
FIGS. 3A to 3C are exploded cross-sectional views of a procedure for joining both side edges with a hot-melt adhesive.
FIG. 4 is a front view of a deployed state of disposable pants,
FIG. 5 is an exploded perspective view of the disposable pants.
6A and 6B are partially enlarged cross-sectional views of a joining structure of both side edges by heat sealing.
FIGS. 7A and 7B are conventional disposable pants, FIG. 7A is a perspective view, and FIGS. 7B and 7C are cross-sectional views corresponding to line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Disposable pants 12 Outer surface side sheet 13 Skin surface side sheet 14 Absorber 16 Sheet | seat laminated body 16a Both-sides edge part 16b Folding base part 16c Folding part P Front abdominal part Q Back part S Leg opening part T Waist opening part a, b Joining

Claims (3)

The sheet laminate including the absorbent body is folded into two in the front and rear, the both side edges are joined, and a waist opening and a pair of leg openings are formed.
The both side edge portions are folded inward, and the outer surfaces of the respective folding base portions are joined to each other by a hot melt adhesive or / and heat seal, and the folded portions at the joining portions are respectively in the front-rear direction. Disposable pants characterized in that they are folded back and the inner surface on the front end side of each folded portion is joined to the inner surface of the sheet laminate by hot-melt adhesive or / and heat sealing, respectively.   The sheet laminate is composed of a breathable skin side sheet and an outer sheet, and the absorbent is a highly absorbent polymer between a liquid permeable top sheet and a liquid impermeable back sheet. The disposable pants according to claim 1, wherein an absorptive core having a thin sheet shape fixed on a nonwoven fabric base material is interposed, and the back sheet is bonded and fixed to the upper surface of the skin side sheet. A method for producing the disposable pants according to claim 1 or 2,
A step of folding the sheet laminate composed of the skin side sheet and the outer surface side sheet in two so that the skin side sheet is the outer side and the outer side sheet is the inner side;
A step of joining the outer side sheets of the folded sheet laminated body at a position to be a folding base of both side edges of the sheet laminated body;
Folding both side edges of the sheet laminate to the outside, joining the skin side sheets of the folded side edges to the skin side sheet,
A method for producing disposable pants, comprising the step of turning the sheet laminate so that the skin side sheet is on the inside and the outer sheet is on the outside.

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