JPH05137746A - Manufacture of disposal underpants - Google Patents

Abstract

PURPOSE:To obtain decent underpants by forming an inside member by cutting a continuous inside member formed by interposing a core and attaching a continuous flap web, folding it and arranging it between continuous composite outside webs to which an elastic member for the waist round and the leg round is attached, sealing it and forming to continuous underpants, and cutting it. CONSTITUTION:A continuous laminated body 13 is formed by arranging an absorptive core 11 at a prescribed interval in a continuous carrier web 10, and superposing and joining a continuous inside web 12, and a continuous flap web 17 is jointed to both sides on the upper face. By cutting it, an inside member 19 is obtained. On the other hand, on the inside surface of a continuous outside web 21, a continuous composite outside web 26 is formed by sticking and attaching a leg round elastic member 23 curved in a necessary surface area corresponding to size of two folds of the upper face or the lower face of a folded inside member 19, and also, a waist round elastic member 24 between the leg round elastic members 23 in the surface area 22. By installing the inside member 19 between these continuous composite webs 26 and sealing it, continuous underpants 28 are formed, and cut into each underpants 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing disposable wearing articles such as so-called training pants for infants, incontinence pants, and sanitary pants for women.

[0002]

2. Description of the Related Art The applicant of the present invention has found a suitable method for continuously producing the pants described in Japanese Patent Laid-Open No. 3-123.
This is disclosed in Japanese Patent Publication No. 551. The preceding invention is
Each inner member having a core is folded in two, the inner members are arranged on a production line, and the inner members are covered with two outer webs to which elastic members for leg and waist are attached,
This is a method of obtaining individual pants by sealing and cutting the required parts. However, since this prior invention improves the ability to prevent excrement from leaking from the side edges of the pants,
It does not disclose a method for providing elastic flaps forming pockets on both sides of the inner surface of the pant.

When the manufacturing method of the prior invention is used, which manufacturing step of the prior invention can be incorporated into the constituent member of the pants to produce the desired neat pants? It becomes an issue. The present invention is to solve the problem.

[0004]

In the pants according to the present invention for solving the above-mentioned problems, a pair of continuous flap webs are attached to a continuous laminated body having a core interposed therebetween, and the continuous flap webs are cut into individual inner members, Folding these individual inner members so that the flaps are located inside, and attaching leg and waist elastic members for these individual inner members to the inner surface of the two continuous outer webs, between the continuous outer webs. The required parts are sealed by interposing the individual inner members to form continuous pants, and the required parts are cut to obtain the individual pants.

[0005]

According to the present invention, the flap having the elastic member is attached to the inner member, but the inner member is a core which is more rigid than non-woven fabric or plastic film generally used for pants of this kind. In addition, the elastic member does not deform due to the contracting force of the elastic member in the process of folding the flap so as to be located inside the inner member and interposing it between the two continuous outer webs. .. Therefore, it is possible to obtain neat pants in which the inner member is properly interposed between the two continuous outer webs, and thus the inner member is normally interposed.

[0006]

1 is a perspective view showing a pair of pants manufactured by the method of the present invention. The pants 1 has a leg surrounding portion 2 and a waist surrounding portion 3. As will be described later, an absorbent core is interposed between the front and rear bodies 4 and 5, and joint seals 6 and 7 are applied to both side edges of the front and rear bodies 4 and 5 and the crotch edge, and the leg surrounding portion 2
Also, elastic members are attached to the waist portion 3 to give them elasticity.

2 and 3 are perspective views schematically showing the process of carrying out the pants according to the method of the present invention. In the following description, it should be understood that the constituent material of the pants has been transferred to the assembly process (not shown).

In FIG. 2, continuous carrier web 10
Of the absorbent core 1 in which recessed portions 14 are formed on both sides in the longitudinal direction of the
1 are arranged at given intervals, and the core 11 is provided on the upper surface thereof.
The continuous laminated body 13 is formed by stacking and joining continuous inner webs 12 having a width dimension larger than the width dimension.

A continuous elastic member 16 is attached to the pair of continuous webs 15 having a size smaller than a half of the width of the continuous inner web 12 in the vicinity of the inner edges thereof with an adhesive while being stretched. The member 16 is coated to form each continuous flap web 17.

On both sides of the upper surface of the continuous laminate 13, the outer edge of each continuous flap web 17 is joined under the extension of the web to form a continuous inner member 18.

At the central portion between each of the cores 11, the continuous inner member 18 is cut in the width direction to obtain individual inner members 19.
Make up.

In FIG. 3, the cut flap web 1 is shown.
The individual inner members 19 are folded in the center in the longitudinal direction so that 7 is located on the inner side, and the folds 20a and the opposite ends 20b of the folds 20a formed by folding the inner members 19 thus folded are opposed to each other. Align as you would.

On each of the inner surfaces of the two continuous outer webs 21 whose width is larger than the width of each inner member 19, and
A leg-surrounding elastic member 23 made of a plurality of elastic yarns is curved inward at the center portions on both sides in each given surface area 22, which is approximately equivalent to twice the size of the upper surface or the lower surface of each folded inner member 19. A plurality of elastic yarns are attached in each of the surface areas 22 and spaced apart in the longitudinal direction between the leg-surrounding elastic members 23 facing each other in the longitudinal direction of the continuous outer web 21 in the longitudinal direction. The waist surrounding elastic member 24 made of is attached with an adhesive, and the second outside continuous web 25 is superposed on the surface of each continuous outside web 21 to which the leg surrounding and waist surrounding elastic members 23, 24 are attached with an adhesive. Bonded with a laminating adhesive to form a continuous composite outer web 26.

The upper surface of the two adjacent inner members 19 aligned with each other is provided with a given surface area 22 of the second continuous outer web 25 of one of the continuous composite outer webs 26, and the lower surface of both inner members 19 is continuous. The two continuous composite outer webs 26 are stacked on each inner member 19 to form a continuous laminate so that the given surface areas 22 of the other second continuous outer web 25 of the composite outer web 26 are located in contact with each other. To do. At this time, the outer surface of the end 20b of each inner member 19 and each second continuous outer web 25 are joined by a joining seal (not shown). Both side edges 27 along the length direction of this continuous laminated body and each inner member 19
Between the folds 20a, the joint pants 6 and 7 are applied by heating or ultrasonic fusion to form the continuous pants 28.

A widthwise direction of the continuous pants 28 is defined by a line 29 between the opposite ends 20b of the folds 20a of the inner members 19 and a line 30 passing through the center of the joint seal 7 between the folds 20a of the inner members 19. The individual pants 1 are formed by cutting the outer peripheral portion 31 defined by the leg-surrounding elastic member 23 and cutting the outer peripheral portion 31.

The continuous carrier web 10 has a tissue paper, the continuous inner web 12 has a nonwoven fabric, the continuous outer web 21 has a stretchable nonwoven fabric, the second continuous outer web 25 has a stretchable plastic or rubber film, and the elastic member 2.
Natural and synthetic materials having rubber elasticity are used for 3 and 24, respectively. Further, the core 11 is a state in which fluff pulp, thermoplastic crimped staple fibers and superabsorbent polymer particles are mixed almost uniformly, and the mixture is heat-treated to fuse the staple fibers together and to sprinkle an appropriate amount of water. A continuous web is formed by appropriately compressing in the thickness direction, and the web is in the form of a sheet or a mat, and is formed in an hourglass shape so that it does not easily lose its shape.

[Brief description of drawings]

FIG. 1 is a perspective view of pants produced by a production method according to the present invention.

FIG. 2 is a perspective view schematically showing a first half step of the manufacturing method according to the present invention.

FIG. 3 is a perspective view schematically showing a latter half step of the manufacturing method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pants 6,7 Bonding seal 10 Continuous carrier web 11 Core 12 Continuous inner web 13 Continuous laminate 15 Continuous web 16 Continuous elastic member 17 Continuous flap web 18 Continuous inner member 19 Individual inner member 20a Fold 20b Opposite end 21 Continuous outer web 22 given area 23 leg elastic member 24 waist elastic member 25 second continuous outer web 26 continuous composite outer web 28 continuous pants

Claims (2)

[Claims] 1. An absorbent core formed in the length direction of a continuous carrier web is arranged at given intervals, and a continuous inner web having a width dimension larger than the width dimension of the core is superposed on and bonded to the upper surface thereof. A step of constructing a continuous laminated body, and a step of constructing each continuous flap web by attaching a continuous elastic member to the inner edge of a pair of continuous webs having a dimension smaller than one half of the width dimension of the continuous inner web under extension And a step of joining the outer edges of the continuous flap webs on both sides of the upper surface of the continuous laminate under the extension of the webs to form a continuous inner member, and the continuous inner side at a central portion between each of the cores. Cutting the members in the width direction to form individual inner members, and cutting the individual inner members so that the cut flap webs are located inward at their longitudinal center. Folding, aligning the thus folded inner members so that the folds formed by folding and the opposite ends of the folds are in close proximity to each other, and a continuous line whose width is not smaller than the width of the inner members. A leg-surrounding elastic member is curved inwardly on each of the inner surfaces of the outer web and at the center portions on both sides in each given surface area substantially corresponding to twice the size of the upper surface or the lower surface of each folded inner member. Attaching, and further, in each of the surface regions, between the leg surrounding elastic members facing in the length direction of the continuous outer web, the waist surrounding elastic members are spaced apart in the length direction and the waist surrounding elastic members are provided in the width direction. A step of mounting and forming a continuous composite outer web by superposing and joining second continuous outer webs on the surfaces of the respective continuous outer webs to which the leg-surrounding and waist-surrounding elastic members are mounted. And said given area of said second continuous outer web of one of said continuous composite outer webs on the upper surfaces of said aligned adjacent inner members, and said continuous surface on the lower surface of said inner members. The two continuous composite outer webs are superposed on each other to form a continuous laminate so that the given surface areas of the second continuous outer web on the other side of the composite outer web are in contact with each other. , A step of forming continuous pants by applying a joint seal between both side edges along the length direction of the continuous laminated body and between the folds of the inner members, and The outer side defined by the leg-surrounding elastic member while cutting in the width direction between the opposite ends of the folds of the inner member and the center of the joint seal between the folds of the inner members. Method of manufacturing disposable pants which comprises a step of partial ablation to the form of the individual pants. 2. A stretchable nonwoven fabric is provided on the continuous outer web.
The method according to claim 1, wherein a stretchable film is used for the second continuous outer web.