JPH0744943B2 - Disposable diaper and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a disposable diaper having an upright elastic sheet on a side portion of a water-permeable inner surface sheet.

PRIOR ART For the purpose of enhancing the adhesion to the body when using a disposable diaper and preventing leakage from the side surface of the absorbent pad 102, elastic bodies 101 'are provided on both sides of the absorbent pad 102 as shown in FIG. Upright elastic sheet holding 1
There is a bonded 01.

○ Problems of the Prior Art In the conventional disposable diaper shown in FIG. 9, the elastic member is extended to the back region P and the front region R in addition to the crotch region Q required for the purpose. .
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 first invention of the present application, an elastic body in a stretched state is continuously sandwiched between two sheet tapes in parallel with each other in the longitudinal direction and adhered to each other to form a continuous S-shaped cut. An elastic tape, which is divided into two by a line and holds the elastic body intermittently in the longitudinal direction, is provided with its wide portion located in the crotch region of the surface of the top sheet covering the absorbent pad, and The elastic body is adhered at a portion where it is not held, and the small portion is cut laterally at predetermined intervals to form a pair of left and right upright elastic sheets.

In the second invention of the present application, an elastic body in a stretched state is continuously sandwiched between two sheet tapes in parallel with each other in the longitudinal direction and adhered to each other, and divided into two by a continuous S-shaped cutting line. A pair of left and right elastic tapes for upright elastic sheets, which are continuously held in an elastic body in the longitudinal direction of a book, are manufactured, and a non-water-permeable outer surface on which an absorbent pad is placed in the central portion in the width direction. A pair of left and right elastic tapes are supplied to the side of the absorbent pad above the diaper body formed by placing an inner sheet on the sheet, and the left and right elastic tapes are supplied. Is adhered to the inner sheet at the portion where the elastic body is not held with the wide portion positioned in the crotch region, and the elastic tape for the upright elastic sheet is placed in the middle of the small portion together with the inner sheet and the outer sheet. Off And to form an upright Heras tic sheet.

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

Referring to FIG. 3, an elastic body (one band-shaped elastic body or a plurality of rubber threads) 12 in a stretched state is sandwiched and adhered to the sheet tape 11 in the widthwise central portions of the sheet tapes 11 and 11 '. The elastic sheet 10 is formed by dividing the continuous S-shaped cutting line C1 into two parts to partially adhere an elastic body to form two continuous elastic tapes 10 for an upright elastic sheet. Join the flow of the diaper manufacturing process, adhere to the diaper body with an adhesive HM such as hot melt, and cut at the same time at the narrow portion in the narrow direction at the transverse cutting line C2 at the same time in the narrow portion, and a pair of left and right Form the upright elastic sheet 1.1.

Next, FIGS. 1 and 2 show a disposable diaper A of the present invention.
The elastic tapes 10 and 10 for the upright elastic sheet are positioned near both sides of the absorbent pad 2 and the wide portions 10a thereof are positioned in the crotch region Q, and the water permeable inner sheet is shown. It is adhered to No. 4 with an adhesive HM such as hot melt. In the figure, 3 is a water impermeable outer sheet (back sheet). In the embodiment of FIGS. 1 and 2, the elastic body 12 has three rubber threads 12a.

FIG. 4 shows a manufacturing process of the disposable diaper according to the present invention. First, the elastic tapes 10 for a side elastic sheet are manufactured by steps a and b.

(A) A stretched elastic body (three rubber threads) 12a supplied by a rubber thread roll 22 and an extension roller 23 to the sheet tape 11 of the non-woven fabric sheet supplied by the supply roller 21.
Is adhered to the central portion in the width direction of the non-sheet tape. Further, the sheet tape 11 'supplied from the supply roll 21' is superposed on it, and the elastic body (rubber thread) 12 is sandwiched.

(B) An elastic tape for a pair of left and right continuous upright elastic sheets obtained by dividing the sheet tapes 11 and 11 'to which the rubber thread 12 is attached by the cutting device 24 into two along the continuous S-shaped cutting line C1.
Produce 10 ・ 10.

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

(C) The absorbent pad 2 is placed on the central portion in the width direction of the outer surface sheet 3 supplied by the roll 25, and the inner surface sheet 4 is supplied by the roll 26 thereon and adhered to each other.

(D) A pair of left and right elastic tapes 10 for the upright elastic sheet, which are divided into two by the step b, are formed in the vicinity of both sides of the absorbent pad 2 on the inner surface sheet 4, and the wide portion 10a of the elastic tape 10 is divided into crotch regions Q ( (Center part in the longitudinal direction of the absorbent pad)
It is adhered to the inner sheet 4 in a state of being positioned at. At this time, the product of the second embodiment as shown in FIGS. 6 and 7 can be manufactured by crossing the elastic tapes 10, 10 for the upright elastic sheet laterally.

(E) A disposable diaper equipped with the upright elastic sheet tapes 10 and 10 is completed by cutting the elastic sheet tapes 10 and 10 together with the inner sheet 4 and the outer sheet 3 to a predetermined size in the middle of the pinched portion 10b. .

Although the above-mentioned sheet tapes 11 and 11 'are made of a non-woven fabric sheet and made of the same material in the embodiment, the upper sheet tape 11 and the lower sheet tape 11' have different types (material, The nonwoven fabric may have different thicknesses or the like, and one or both of them may be a material other than the nonwoven fabric (water-permeable or water-impermeable, for example, PE sheet). The sheet width of both sheet tapes 11 and 11 'can achieve the object of the present invention if the elastic body 12 can be sandwiched, and it is not necessary to make the sheet widths of both sheet tapes 11 and 11' the same. For example, as shown in FIG. 7, the width of the portion of one of the sheet tapes 11 'facing the top sheet (top sheet) is reduced, or as shown in FIG. 8, a portion to be bonded to the top sheet of the main body of the diaper. It is also possible to save the material by providing only one lower tape sheet 11 '.

EFFECTS OF THE INVENTION The present invention can reduce the material cost of the product and only partially by adhering the elastic body only to the lateral crotch region of the absorbent pad that requires the upright elastic sheet. By making the work of attaching the elastic body a simple and easy method called continuous tape application work, continuous work can be made possible and product cost can be reduced, effectively reducing the cost of this kind of low-priced product. To achieve.

[Brief description of drawings]

FIG. 1 is a development view of a disposable diaper according to the present invention. FIG. 2 is also a longitudinal sectional view showing a case where the elastic body is composed of three rubber threads. FIG. 3 is an explanatory view of an elastic tape for an upright elastic sheet. FIG. 4 is a method for manufacturing a disposable diaper according to the present invention, FIG. 5 is a development view similar to FIG. 1 showing a second embodiment of the disposable diaper according to the present invention, and FIG. 6 is a vertical sectional view similar to FIG. is there. 7 and 8 are partial cross-sectional views showing another embodiment of the elastic tape. FIG. 9 is an exploded view of a conventional disposable diaper. 1 …… Upright elastic sheet 2 …… Absorption pad 3 …… Outer sheet 4 …… Inner sheet 10 …… Elastic tape for upright elastic sheet 10a …… Wide part 10b …… Supporting part 11 …… Sheet tape 12 …… Elastic body (rubber thread)

Claims (2)

[Claims] 1. A disposable diaper in which upright elastic sheets are mounted on both sides of an absorbent pad on the surface of an inner sheet covering the absorbent pad, wherein an elastic body in an extended state is longitudinally provided between the two sheet tapes in the longitudinal direction. An elastic tape, which is continuously sandwiched in parallel and adhered to each other, is divided into two by a continuous S-shaped cutting line and holds an elastic body intermittently in two longitudinal directions, In the crotch region of the surface, the wide portion is located, and the elastic body is not held, and the portions are bonded together, and the narrow portion is laterally cut at predetermined intervals to form a pair of left and right upright elastic sheets. Disposable diaper characterized by. 2. A method for producing a disposable diaper in which an upright elastic sheet is mounted above a water-permeable outer sheet and a water-permeable inner sheet adhered above the absorbent pad. The stretched elastic body is continuously sandwiched and adhered to the sheet tape in parallel with the longitudinal direction, and the elastic body is intermittently held in the longitudinal direction by dividing the sheet tape into two continuous S-shaped cutting lines. A pair of left and right elastic tapes for upright elastic sheets are manufactured, and an inner sheet is placed on a water-impermeable outer sheet on which an absorbent pad is placed at the center in the width direction. In a state in which the pair of left and right elastic tapes are supplied to the side of the absorbent pad and the pair of left and right elastic tapes are supplied with the wide portion positioned in the crotch region. The elastic tape for the upright elastic sheet is cut along the inner sheet and the outer sheet at the part where the elastic body is not held, and the upright elastic sheet is formed by cutting the elastic tape for the upright elastic sheet at the middle of the small portion. A method for manufacturing a disposable diaper, which comprises completing a disposable diaper equipped with.