JPS60225501A - Laminated upper material - 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] <Industrial application field> The present invention relates to a laminated covering material.

<Prior Art> Generally, in order to improve the strength of footwear covers, a front material and a backing material are pasted together using a rubber adhesive.

On the other hand, when molding shoes by injection molding, the last mold is heated to 60°C to 80°C in order to increase the adhesive strength of the shoelace or to heat set the shoelace suspended in the last mold. In the case of rubber-based adhesives, the cover material is heated and vulcanized when bonding the front and backing materials, so even if the cover is hung in a heated last mold, the heat setting property of the cover (i.e., There was a risk that the opening of the shoe would be distorted and the side of the shoe would be bent, resulting in shoes that did not look good. Furthermore, the poor heat setting properties caused distortion in the lace material when it was hung, the distortion remained when the injection molded sole was formed, and the toes curled up when dried after washing.

<Purpose of the Invention> The present invention improves these drawbacks, and satisfies the texture, rigidity, and other conditions necessary for a cover material at room temperature, and when suspended in the last mold, the heat of the last mold causes The present invention provides a laminated covering material that is soft and has good heat setting properties, as well as excellent workability and cold resistance. Chi~30chi, molecular weight 5000~! Softening point (according to RAB method) of 0,000 ethylene vinyl acetate copolymer resin and tackifier, with addition of flow modifier, filler, etc. as necessary.
The present invention relates to a laminated covering material in which a front material and a backing material are laminated with a film-like adhesive composition at a temperature of 00°C to 130°C.

Tackifiers used in the present invention include rosin, rosin derivatives,
Turpentine resin, petroleum hydrocarbon resin, etc. can be used.

Calcium carbonate, clay, silica, titanium oxide, etc. can be used as fillers.

Polyethylene, stearic acid, wax, etc. can be used as the flow modifier.

As the front material and backing material used in the present invention, fabrics such as natural fibers and synthetic fibers, sheets of non-woven fabric, leather, synthetic leather, etc. can be used.

The ethylene vinyl acetate copolymer resin used in the present invention has a vinyl acetate content of 20 tons to 30 tons and a molecular weight of 5,000 to 40 tons.
000, the softening point (by R&B method) of 100°C when formed into a film adhesive composition.
~130℃, heating at 60℃ to 80℃ softens the above composition to the extent that it does not ooze out from the front material or backing material, eliminates molding distortion, and becomes hard when the temperature is lower than that temperature. Tackifiers and flow modifiers are used to improve the adhesion between the front material and the backing material.

To describe the laminated covering material of the present invention in more detail, 70 to 99.8 parts by weight of ethylene-vinyl acetate copolymer resin, 0.00 to 0.00 parts by weight of tackifier, flow modifier, filler, etc. as necessary. A composition to which 2 parts by weight to 30 parts by weight has been added is mixed and heated, and made into a film-like adhesive composition with a softening point of 100°C to 130°C with a thickness of 50 to 300μ using a T-die extruder. A front material and a backing material are laminated together using an adhesive composition to obtain a laminated material.

At this time, the film-like adhesive composition is extruded using a T-die extruder and immediately attached to the backing material (or front material), and then the front material (
or backing material) may be pressed with overlapping nip rolls,
Once the film-like adhesive composition is cooled to form a complete film, it may be sandwiched between a front material and a backing material and adhered with a heated roll to produce a laminated covering material.

The obtained laminated fabric material was cut into fabric fabrics, the insole was sewn on, the material was hung on the last heated to 60°C to 80°C, heat set for 1 minute to 3 minutes, and the side mold and A void is provided in the bottom mold, the sole is formed by injection into the void, and after the sole is cooled for 1 to 3 minutes, the shoe is taken off to obtain a shoe with good heat setting.

<Effects of the Invention> The laminated cloth material of the present invention does not require heating and vulcanization when laminating the laminated cloth materials, and moreover, it uses a film-like adhesive composition that is a heat-sensitive cloth adhesive. Because of this, the heat setting property is good, and shoes with good shape can be obtained.Furthermore, even when the shoes are washed and dried, the toes do not curl up. In addition, the texture is good and the adhesive strength is LOK4/crn or higher.
It has excellent processability and cold resistance. Moreover, the reason why the film-like adhesive composition has good heat setting properties when suspended in the last mold is that the softening point of the film-like adhesive composition is 100°C to 130°C.
℃, so heating to a final temperature of 60℃ to 80℃ will completely adapt to the soft shirasto mold and heat set it.As it will become hard at low temperatures, it is best to cool it to prevent the heat set shape. This is because it will be retained as is.

In addition, since the laminated covering material of the present invention uses a film-like adhesive composition to adhere the front material and backing material, it is easier to control the basis weight and is more stable than with powder or liquid adhesives. It is possible to produce laminated covering materials of high quality.

<Example> Next, an example will be shown, but the present invention is not limited thereto.

A film-like adhesive composition having a thickness of 200 μm formed from the composition shown in Table 1 was laminated onto a backing fabric made of staple fabric 79, and an outer fabric made of cotton fabric 79 was further laminated to obtain a cover material.

Comparative Example> In the same manner as in the Examples, adhesive materials containing natural rubber as a main component as shown in Table 1 were laminated together and then vulcanized to obtain a cover material.

<Comparison between Examples and Comparative Examples> The above-obtained material was hung into a last mold at 70±5°C, and the side mold and bottom mold were combined to injection mold the polyvinyl chloride resin compound. to form the sole of the shoe. Thereafter, the setability in a mold, texture, adhesive strength, etc. were examined, and the embroidery covering material of the example obtained good results as shown in Table 1.

Table 1 [Judgment] ◎Very good condition O good X defective

Claims (1)

[Claims] Vinyl acetate content 20-30%, molecular weight 5000-4
The surface material is made of a film-like adhesive composition with a softening point of 100'C to 130C, which is made of an ethylene vinyl acetate copolymer resin consisting of 0000 and a tackifying acid agent, and optionally contains a flow modifier, a filler, etc. A laminated covering material made by pasting together a backing material and a backing material.