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Adhesive film, preparation method of adhesive film and shoe sole including adhesive film
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A film and negative film technology, applied in the preparation of film, film, including film soles, can solve problems such as viscosity drop, achieve the effect of enhancing interaction force, reducing pollution, and improving bonding strength
Active Publication Date: 2021-06-15
MAOTAI FUJIAN SOLES CO LTD
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Problems solved by technology
[0006] The embodiment of the present application solves the problem that the viscosity of the adhesive film in the sole in the prior art drops significantly after humidification and aging by providing the adhesive film, the preparation method of the adhesive film, and the shoe sole including the adhesive film, and realizes the aging through damp heat (70 ℃, 95% humidity, 72h) test, the bonding strength can still reach 4.2N / mm, which is far higher than the bonding strength requirements of the existing composite soles, and can effectively avoid the glue-opening of the composite soles caused by wet aging and heat aging Phenomenon
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Embodiment 1
[0024] In the present embodiment, a kind of adhesive film is made up of following components by weight: EVA15015 parts, EVA7A60H25 parts, maleic anhydride grafted SBS rubber (graft rate 7%) 21 parts, maleic anhydride polybutadiene 173114 parts 12 parts of liquid polyisobutylene, 10 parts of M80 resin, 1 part of zinc stearate, 0.2 parts of crosslinking agent BIBP, 0.1 parts of antioxidant B1004. After the above-mentioned raw materials are internally kneaded at 105°C, kneaded, and released into sheets, they are cast in a casting machine to obtain the adhesive film with a release paper as the base film, and the thickness of the adhesive film is 0.5-3mm.
[0025] After the thermoplastic rubber is mixed according to the formula requirements, it is poured, kneaded, and released. The film prepared above is covered on the thermoplastic rubber sheet through the laminating machine, and finally punched to obtain a specific shape of the film. Thermoplastic rubber backsheet. Then put the ...
Embodiment 2
[0028] In the present embodiment, the preparation method and the method of use of the adhesive film are the same as in Example 1, except that:
[0029] The composition of raw materials is different (see Table 1 for details).
[0030] The finished shoe sole prepared above had an initial bonding strength of 4.9 N / mm; after heating and aging, the bonding strength was 4.4 N / mm; after humidifying and aging, the bonding strength was 4.3 N / mm.
Embodiment 3
[0032] In the present embodiment, the preparation method and the method of use of the adhesive film are the same as in Example 1, except that:
[0033] The composition of raw materials is different (see Table 1 for details).
[0034] The initial bond strength of the finished shoe sole prepared above is 5.3N / mm; after heating and aging, the bond strength is 4.8N / mm; after humidification and aging, the bond strength is 4.2N / mm.
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Abstract
The invention discloses an adhesive film, a preparation method of the adhesive film and a shoe sole comprising the adhesive film, wherein the adhesive film is composed of the following components in the following parts by weight: EVA, maleic anhydride grafted SBS rubber, maleic anhydrided polybutadiene , liquid polyisobutylene, tackifying resin, zinc stearate, cross-linking agent, antioxidant; The adhesive film of the present invention is a cross-linking type adhesive film, and the cross-linking agent decomposes in the molding process to generate active free radicals, Free radical crosslinking occurs between EVA, maleic anhydride grafted SBS rubber, maleic anhydrided polybutadiene and saturated hydrocarbons in the molecular structure of liquid polyisobutylene in the film to form a network structure and improve the film Cohesion; at the same time, the saturated hydrocarbon structure in the film and the saturated hydrocarbon structure in the EVA midsole undergo free radical crosslinking, and the saturated hydrocarbon in the film and the saturated hydrocarbon structure in the thermoplastic rubber backsheet undergo free radical crosslinking, enhancing Improve the interaction force between the film and the EVA midsole and thermoplastic rubber backsheet, that is, improve the bonding strength.
Description
technical field [0001] The invention relates to the technical field of bonding materials, in particular to an adhesive film, a preparation method of the adhesive film and a shoe sole comprising the adhesive film. Background technique [0002] With the improvement of living standards, single-component soles such as rubber soles and EVA soles cannot meet the needs of customers. Rubber soles have outstanding characteristics such as good wear resistance and good anti-slip performance, but they are heavy and inconvenient to wear; EVA The sole has good elasticity and small specific gravity, but poor wear resistance and anti-slip performance. In the prior art, the soles with superior comprehensive performance include outsoles and midsoles. The outsoles are generally rubber soles, TPR soles, etc., and the midsoles are generally EVA soles, PU soles, etc. The outsoles and midsoles are generally connected by an adhesive film. . [0003] The existing film composition includes epoxidiz...
Claims
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Application Information
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