JPH0751085B2 - Manufacturing method of laminated shoe upper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated shoe upper.

[0002]

2. Description of the Related Art In order to reveal a three-dimensional shape on the upper of a shoe and to give different physical properties to the front and back sides, the front and back cloths are attached with a natural rubber or synthetic rubber adhesive. The combined instep is used. When such an instep is used as the instep of polyvinyl chloride injection-molded shoes, many insteps whose surface is treated with polyurethane are used to improve the adhesion to the polyvinyl chloride shoe sole. Has been done.

[0003]

In this case, the adhesive for bonding the front cloth and the back cloth exudes to the surface of the front cloth and comes into contact with the polyurethane, so that the vehicle is running, the oil stove, the oil fan heater. It was yellowing in the distribution process before it got into the hands of consumers due to NO _X gas coming out from the etc. In order to avoid such a phenomenon, an adhesive having substantially the same composition as the adhesive was used as a sealing material for the purpose of preventing the adhesive from seeping out on the surface of the surface cloth. .

However, since the above-mentioned sealing material which is usually used contains a vulcanizing agent such as sulfur as a vulcanizing agent, the sulfur, accelerator and the like come into contact with polyurethane,
The result was to promote yellowing. The present invention has been made in view of the above circumstances, and an object thereof is to use a sealing material that does not yellow the polyurethane that has treated the surface of the outer cloth, and to obtain a shoe upper whose surface does not yellow even by NO _X gas. Is.

[0005]

The present invention relates to a method for producing a shoe upper in which a back surface of a front cloth whose surface is treated with polyurethane and a back cloth are attached with a natural rubber-based or synthetic rubber-based adhesive, or As a sealing material for treating the back side of the front cloth in the method of manufacturing the shoe upper in which the back side of the front cloth and the back cloth are attached with a natural rubber-based or synthetic rubber-based adhesive and the surface of the front cloth is treated with polyurethane. The gist of the present invention is a method for producing a shoe upper, which is characterized by using a carboxy-modified synthetic rubber latex.

In carrying out the present invention, as the sealing material, carboxy-modified styrene / butadiene copolymer rubber latex, carboxy-modified methyl methacrylate glast-polymerized polybutadiene rubber latex, carboxy-modified acrylonitrile / butadiene copolymer rubber latex, etc. are used. Is not sulfur vulcanized, but melamine resin,
Cross-linked by epoxy resin, zinc white, etc. In order to have a sealing effect, the latex is, for example, 40.0
00 centipoise (measured by rotating the No. 5 rotor at 10 RPM) to 200.000 centipoise (measured by rotating the No. 7 rotor at 10 RPM) is sufficient, and is used for bonding the front cloth and the back cloth. It is a necessary condition that the adhesive has good adhesiveness with the adhesive.

[0007]

[Function] Since there is a sealing material containing no sulfur and no vulcanization accelerator between the back surface of the front cloth and the adhesive, the two are completely separated from each other, and thus are included in the adhesive. Sulfur and a vulcanization accelerator do not accelerate the yellowing of the polyurethane treating the surface of the surface fabric. As the adhesive, a natural rubber type or a synthetic rubber type can be used, so that the elasticity,
The texture is not damaged.

[0008]

Example 1 Compound 1 Natural rubber 50 parts by weight Styrene / butadiene copolymer rubber 50 〃 Zinhua No. 3 5 〃 Stearic acid 1 〃 Vulcanization accelerator M 0.8 〃 Vulcanization accelerator DM 1.0 〃 Vulcanization acceleration Agent D 0.1 〃 Rosin resin 3 〃 Calcium carbonate 70 〃 Titanium oxide 20 〃 Ultramarine 0.4 〃 Sulfur 2 〃 Rubber volatile oil 400 parts by weight Compound 2 Carboxy-modified styrene / butadiene copolymer 100 parts by weight Thickener Sodium acrylate 3〃 25% ammonia water 0.5 parts by weight

Formula 2 was added to 60.000 centipoise (NO.
Rotate 6 rotor at 10 RPM and measure)
Prepared as a sealing material, cotton (Ponzi No. 14 exposed) as the front cloth
Then treat the surface with polyurethane and
It was treated with a sealing material. The back of this table cloth and cotton
No.) Backing cloth made with the adhesive prepared according to Formula 1
Lamination of the present invention after vulcanization with hot air at 140 ° C
I got a shoe instep. In the manufacturing process of the laminated shoe upper
And an adhesive prepared by compounding 1 as a sealing material
A laminated shoe upper obtained by using was used as a control example. The two
Peeling test and NO using two shoe uppers_XGas cloth table
A surface discoloration test was performed. The Control Example of the Invention Dry 0.7 0.8 Peeling Test (kg / cm 2) Wet 0.6 0.7 Before Bakuro-4.8^{* 2} -5.5 NO_XGas discoloration test^{* 1}  After baculo 8.5 20.2 * 1: According to JIS L0855. * 2: Suga Test Machine Co., Ltd. SM color computer
It was used and displayed by the degree of discoloration. The shoe upper of the present invention shows the same adhesive strength as that of the control example.
However, the degree of discoloration was extremely small.

[0010]

[Effect] Although the physical properties such as adhesive strength are similar to those obtained by the conventional method, the surface of the outer cloth shows little yellowing during long-term storage and display. It was

Claims (1)

[Claims] 1. A method of manufacturing an instep cover in which a back surface of a front cloth whose surface is treated with polyurethane and a back cloth are bonded together with a natural rubber-based or synthetic rubber-based adhesive, or a back surface of the front cloth and a back cloth. In the method of manufacturing shoe uppers where the surface of the outer cloth is treated with polyurethane by laminating and with a natural rubber-based or synthetic rubber adhesive, carboxy-modified synthetic rubber latex is used as a sealing material for processing the back surface of the outer cloth. A method for manufacturing a shoe upper, which is characterized in that