JPH0755229B2 - Disposable diaper and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a disposable diaper having a side elastic on the side of an absorbent pad.

〇Prior art For the purpose of increasing the adhesion to the body when using a disposable diaper and preventing leakage from the side surface of the absorbent pad 1,
As shown in FIG. 5, there are those in which the side elastic sheets 12 are bonded to both sides of the absorbent pad 1.

〇Problems of the prior art In the conventional disposable diaper shown in FIG. 5, the side elastic sheet is extended to the back area P and the front area R in addition to the crotch area Q required for the purpose. There is. Therefore, there is a problem that the product cost increases. In addition, the method of mounting the elastic sheet only in the crotch region has a technical difficulty and requires an expensive machine.

[Means for Solving the Problems] In the present invention, a stretched rubber thread is adhered to a water-impermeable sheet at the central portion in the width direction of the water-impermeable sheet and divided into two by a continuous S-shaped cutting line to reduce the size. A pair of left and right side elastic sheets, which are cut at predetermined intervals in the longitudinal direction at the part, are placed on both sides of the absorbent pad with their wide parts in the crotch region and adhered to the impermeable outer sheet to absorb in the crotch region. Place the wide part of the side elastic sheet on both sides of the pad.

Further, according to the present invention, a stretched rubber thread is adhered to a water-impermeable sheet at a central portion in the width direction of the water-impermeable sheet and divided into two by a continuous S-shaped cutting line to produce a pair of left and right side elastic sheet tapes. Then, the side elastic sheet tape is supplied on the non-water-permeable outer sheet on which the absorbent pad is placed in the central portion in the width direction, the side elastic sheet tape is supplied, and the pair of left and right supplied The side elastic sheet tape is adhered to the outer sheet with its wide portion positioned at the central portion in the longitudinal direction of the absorbent pad, and a water-permeable inner sheet is supplied to absorb the inner sheet to the absorbent pad, the side elastic sheet tape and Adhere on top of the outer sheet and cut the side elastic sheet tape together with the inner sheet and outer sheet to complete the disposable diaper of the specified size. To.

[Examples] Examples will be described below based on examples shown in the drawings.

Referring to FIG. 3, a rubber system 12 in a stretched state is adhered to the water impermeable sheet 11 at the central portion in the width direction of the water impermeable sheet 11 and divided into two by a continuous S-shaped cutting line C1 to make two pieces. Make a continuous partial rubber system adhesive tape so that it joins the flow of the diaper manufacturing process and adhere it to the body of the diaper with an adhesive such as hot melt. A pair of left and right side elastic sheets 1.1 are formed by cutting at the cutting line C2.

Next, FIG. 1 and FIG. 2 show a developed state and a sectional structure of the disposable diaper A of the present invention, wherein the side elastic sheets 1 and 1 are provided on both sides of the absorbent pad 2 and have a wide portion thereof.
1a is located in the crotch region Q and adhered to the water impermeable outer sheet 3, and the water permeable inner sheet 4 is covered above the outer sheet 3 and the side elastic sheets 1.1, and the inner sheet 4 is the outer sheet 3. Is glued to.

FIG. 4 shows a manufacturing process of the disposable diaper according to the present invention. First, the side elastic tape 10 is manufactured in steps a and b.
・ Produce 10.

(A) Water-impermeable sheet 11 supplied by supply roll 21
Then, the rubber thread 12 in the stretched state supplied by the rubber thread roll 22 and the stretching roller 23 is bonded to the central portion in the width direction of the water-impermeable sheet.

(B) The cutting device 24 divides the water-impermeable sheet to which the rubber thread 12 is attached into two along the continuous S-shaped cutting line C1 to produce a pair of left and right continuous side elastic sheet tapes 10.

Next, the disposable diaper according to the present invention is completed by the following steps.

(C) The absorbent pad 2 is loaded on the central portion in the width direction of the outer sheet 3 supplied by the roll 25.

(D) A pair of left and right side elastic sheet tapes 10 divided into two in step b are guided to the side of the absorbent pad 2 on the outer sheet 3 so as to cover the side surface of the absorbent pad, and the linear end portions thereof are introduced. An adhesive such as hot melt is applied over the entire length, and the wide portion is adhered to the outer sheet 3 in a state of being positioned at the central portion in the longitudinal direction of the absorbent pad.

(E) The water permeable inner surface sheet 4 is supplied by the roller 26 above the absorbent pad 2, the side elastic sheet tapes 10 and 10 and the outer surface sheet 3 and bonded.

(F) The product (disposable diaper) A is completed by cutting the side elastic sheet tapes 10 and 10 together with the inner surface sheet 5 and the outer surface sheet 4 into a predetermined size by the cutting device 27.

EFFECT OF THE INVENTION The present invention can reduce the material cost of the product and only partially by adhering the rubber thread only to the lateral crotch region of the absorbent pad that requires the side elastic sheet. By making the work of attaching the elastic body a simple and easy method called continuous tape application work, continuous work is possible and product cost can be reduced, and the machine used for manufacturing is also inexpensive and easy to maintain. It will effectively reduce the cost of the product.

[Brief description of drawings]

FIG. 1 is a development view of a disposable diaper according to the present invention. FIG. 2 is a vertical sectional view of the same. FIG. 3 is an explanatory view of the side elastic sheet. FIG. 4 is a schematic view showing a method for manufacturing a disposable diaper according to the present invention. FIG. 5 is an exploded view of a conventional disposable diaper. 1 …… Side elastic sheet 2 …… Absorption pad 3 …… Outer sheet 4 …… Inner sheet 10 …… Side elastic sheet tape 11 …… Impermeable sheet 12 …… Rubber thread

Claims (2)

[Claims] 1. A disposable diaper in which side elastic sheets are attached to both sides of an absorbent pad, a stretched rubber thread is adhered to a water-impermeable sheet at a central portion in the width direction of the water-impermeable sheet to form a continuous S-shaped cut. It is divided into two parts by a line to form two continuous tapes, which are joined to the flow of the diaper manufacturing process, and a pair of left and right side elastic sheets, which are cut at predetermined intervals in the longitudinal direction at the small knuckles, are used as the absorbent pad A disposable diaper characterized in that the wide portions thereof are located in the crotch region on both sides and adhered to a water impermeable outer surface sheet, and a water permeable inner surface sheet adhered above the water impermeable outer surface sheet. 2. A method for manufacturing a disposable diaper in which side elastic sheets are attached to both sides of an absorbent pad, wherein a stretched rubber system is adhered to a central portion in the width direction of the water impermeable sheet to form a continuous S sheet. A pair of left and right side elastic sheet tapes are produced by dividing the absorbent pad into two parts on a non-water permeable outer sheet with the absorbent pad placed at the center in the width direction, and the side elastic sheet tape is positioned on the side of the absorbent pad. Let me
The side elastic sheet tape is supplied, and the pair of left and right side elastic sheet tapes supplied are adhered to the outer surface sheet with the wide portion thereof positioned at the central portion in the longitudinal direction of the absorbent pad. The inner surface sheet is adhered above the absorbent pad, the side elastic sheet tape and the outer surface sheet, and the side elastic sheet tape is cut together with the inner surface sheet and the outer surface sheet to complete a disposable diaper of a predetermined size. And a method for manufacturing a disposable diaper.