JPS6075602A - Disposable diaper and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disposable disposable diaper with a built-in elastic band and a method for manufacturing the same.

The water-absorbing flannel of the plate-shaped pad is wrapped with tension or net on both sides, and then a non-woven fabric is wrapped on top of that as an outer cover for the inside (skin side), and the outside of the pad is wrapped with a plastic film. Conventionally, as shown in FIGS. 1 to 6, in the disposable disposable diaper, elastic bands 5 (1S) are attached from the inner surface to both side edges of the plastic film 6. Conventionally, Po-Nodmelt 9 has been used as the adhesive. However, when bonding with Ponotomel I, the heat capacity of the hot melt is relatively large, and the plastic film is thermally deformed and many wrinkles are generated, detracting from the aesthetic appearance of the product.

The dispensing method will be explained. Originally, it would have been desirable to use the ejector 12A and the ejector nozzle 13A to directly eject the hot melt onto the plastic film 6 that is being rotated on the rotating drum 1111 as shown by the imaginary line in FIG. As mentioned above, a method has been adopted in which the relatively large amount of heat of the pot melt thermally deforms the plastic filter and causes many wrinkles.

That is, as can be seen in the figure, immediately before the elastic band 5 is laminated onto the plastic film 6 of the rotating drum 11'', that is, at the stage of supplying the elastic band to the rotation 1ζ-1, This is a method of dispensing melt on an elastic band. According to this method, the elastic band is relatively thicker than the plastic film and is therefore less affected by heat from the hot melt. Also, the expansion/contraction 1
It takes some time for the pot melt disbursed onto the green bund to encounter the plastic film on the rotating tram, and the effect on the disbursed pot melt film is also reduced, thus reducing the plastic film. There are fewer wrinkles in the film, and the problem of spoiling its aesthetic appearance has been eliminated.

However, as can be seen in the same figure, hot melting into a long and thin elastic band is not possible with the elastic band supplying kite j. ]-Le 15,
Between 16 and 6', the elastic band is dancing
In extreme cases, there have been frequent incidents where the elastic 7< is turned inside out and stuck to the machine, causing work to be interrupted. In addition, when a guide plate was provided below the 1" roll 15, 16, the kite plate was contaminated by the hot melt, which also stained the elastic pant. Therefore, When using conventional methods, there were inherent limitations on work speed and production efficiency was low.

An object of the present invention is to provide a disposable disposable diaper that does not have a large number of wrinkles that occur at the bonded portion of the plastic film to the elastic hand, and also to provide a method for producing the same.

The gist of the present invention is to interpose a foamed hotmelt as an adhesive medium between a plastic film and an elastic band, and to spray the foamed hotmelt directly onto the elastic band. This is a method of attaching a sex band.

First, to explain the structure of the disposable disposable diaper according to the present invention, as shown in Fig. 6, in the conventional disposable diaper in which an elastic pant is attached to the inside of a plastic film wrapped around the outside of a flannel, the elastic film is The traditional adhesive medium between the elastic band 6 and the elastic band 5
・It was replaced by 10.

Next, a method of adhering the above-mentioned silicone film and elastic band will be explained. Please refer to FIGS. 5 and 6. Foaming type hot melt melt is intermittently applied at a certain pitch on appropriate lines on both side edges of the film 22 surface fed onto the 1q ram 21 from its discharger 32, 32A, and 2 nozzles 33 and 5A. Dispense in a straight line, and discharge in a straight line (
40.4OA). These discharged films are rotated together with the rotating tram, but at the same time, they encounter and merge with the supplied elastic band against the line of the discharged surface of the foamed pot melt, and merge with the line of the discharged surface of the foamed pot melt. It is crimped at the top. That is, the stretchable hand is bonded onto the silicone film via the adhesive medium, which is a foamed bot I/melt.

As mentioned above, the elastic hand is glued onto the plastic film using foam bong 1~melt.
It has the following advantages:

(1) Fewer wrinkles occur on the surface of the plastic film where it is bonded to the elastic pant.

The reason is conventional hot melt This is because the heat capacity of Hora 1-melt is small.

(2) In this bonding device, troubles due to dancing of the supplying stretchable hand do not occur. Therefore, production speed can be further increased.

(6) Compared to foaming hot melt, it costs a few minutes less, leading to the creation of Lost Town.

In addition, the above-mentioned foamed hot-melt adhesives, unvulcanized rubber-based, saturated polyester-based, polyamide 1-based, polyolefin-based and polyolefin-based copolymers or modified products thereof, and these hot-melt adhesives into the air or N2. A gas such as CO2 is mixed in as imageless closed bubbles, and the volume of the bubbles is necessarily expanded to about 15 to 5 times.

These characteristics include maintaining the original adhesive properties; 1. Of course, due to the decrease in the amount of adhesive used in the northeast, the use of adhesives under high pressure in the applicator reduces the viscosity by 1, decreases the fluidity (thixotrophic property) after dispensing, and crimps. thinning the adhesive layer and expanding its bonding area, thereby shortening the adhesive time, improving adhesion to porous and rough surfaces, expanding low-temperature applications by rapidly cooling the surface, and improving elasticity. It has many advantages in terms of adhesive processing, such as improving sealing performance, extending open time during other operations, and reducing overall costs.

As described above, by replacing the adhesive layer 14 of the elastic hunt attached to the inside of the plastic film according to the present invention, the appearance of the product can be improved, the production speed can be improved, and the cost can be significantly reduced. There are several advantages.

[Brief explanation of drawings]

Figure 1 is a front view of the disposable diaper. Figure 2 is a side sectional view of the disposable diaper. Figure 6 is an enlarged view of the Lr section of Figure 2.
Figure 4 shows a conventional manufacturing method for disposable diapers. Figure 5 shows a method for manufacturing disposable diapers according to the present invention. ...Flano 6...
Tesoshu or net 4...Nonwoven fabric 5. 26... Elastic band 6, 22... Plus deck film 9... Hora I/Mel l- 10.40...
・Foaming type hot melt l- 11.21...Rotation 1-ram

Claims (1)

[Scope of Claims] 1) The inner surface of the plastic film 6' which is the outer covering of the disposable zero-disposable diaper, and the elastic band 5 adhered onto the inner surface.
and the foamed Hora I Melt 10 as an adhesive medium.
A disposable disposable diaper characterized by the following: 2') Q! jbol' i! i'j Scope of Ice In the manufacturing process of disposable diapers as described in item 1), the foamed bottle-melt is suspended over a plastic film that rotates over the entire surface of the drum 21, and is intermittently discharged in a line. Clothes 4
0), After that, a semi-assembled elastic bread I is supplied onto the drum from the other side to the dot line 11.
・A method for manufacturing disposable diapers that uses heavy machinery to pressure bond 26.