Adhesive for bonding EVA (ethylene vinyl acetate) foam material with PU (polyurethane) film, as well as preparation method and application thereof

A film lamination and foam material technology, applied in the direction of adhesive types, chemical instruments and methods, polyurea/polyurethane adhesives, etc. The effect of high strength, lower production cost and simple bonding process

Active Publication Date: 2013-09-18
JIANGSU HUADA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is known that the EVA foam material is prepared by foaming ethylene-vinyl acetate copolymer, and has low polarity, while the PU (polyurethane) film is a high-polarity material, and the interface between the two is difficult to bond
In the prior art, hot-melt adhesives are mainly used to bond the two to achieve the lamination of the two. However, the cost of hot-melt adhesives is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A polyurethane adhesive for laminating EVA foam and PU film, the preparation method of which is as follows: add 120 parts of polycarbonate diol (number average molecular weight 2000) and polytetrahydrofuran ether diol (number average molecular weight 4000) into the reaction kettle 120 parts, 60 parts of polydecanediol sebacate, 230 parts of dimethylformamide, 15 parts of cyclohexanedimethanol, after stirring evenly, add 72 parts of toluene diisocyanate, heat up to 75-80°C, As the viscosity of the reaction system increases, add 180 parts of xylene in two times. After the reaction viscosity is tested, add 100 parts of dimethylformamide and 1 part of 1,3-butanediol. After cooling down and stirring evenly, pack it. Its properties are shown in Table 1.

Embodiment 2

[0020] A polyurethane adhesive for laminating EVA foam and PU film, the preparation method of which is as follows: add 140 parts of polydecanediol sebacate (number average molecular weight: 3000), polyhexadecanoic acid 140 parts of lauryl ester diol, 140 parts of polytetrahydrofuran ether diol (number average molecular weight 4000), 260 parts of dimethylformamide, 12 parts of hexanediol, 15 parts of decanediol, after stirring evenly, add diphenyl 90 parts of methane diisocyanate, heat up to 75-80°C, as the viscosity of the reaction system increases, add 90 parts of toluene and 90 parts of chloroform in sequence, after testing the reaction viscosity is qualified, add 100 parts of dimethylformamide and 1,3- 1 part of butanediol, after cooling and stirring evenly, pack, its properties refer to Table 1.

Embodiment 3

[0022] A polyurethane adhesive for laminating EVA foam and PU film, the preparation method of which is as follows: adding 90 parts of polytetrahydrofuran ether diol (number average molecular weight 3000) and 120 parts of polydecyl cetadecanoate diol to the reaction Parts, 120 parts of polydodecyl dodecanoate diol, add 210 parts of dimethylformamide, 10 parts of cyclohexane dimethanol, 12 parts of dodecanol, after stirring evenly, add isophorone two 80 parts of isocyanate, heat up to 75-80°C, as the viscosity of the reaction system increases, add 70 parts of xylene and 70 parts of dichloroethane in two times, after testing the reaction viscosity, add 100 parts of dimethylformamide and 1 part of 1,3-butanediol, cooled and stirred evenly, then packaged, see Table 1 for its properties.

[0023] Table 1

[0024] Performance

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PUM

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Abstract

The invention relates to an adhesive for bonding an EVA (ethylene vinyl acetate) foam material with a PU (polyurethane) film, as well as a preparation method and an application thereof. The adhesive is a polyurethane adhesive, and the polyurethane adhesive is prepared from the following raw materials in content by weight: 20-30% of polyester polyol, 10-15% of polyether polyol, 5-10% of diisocyanate, 1-3% of chain extender, and 50-60% of solvent. The adhesive provided by the invention is good in bonding property with the weakly-polar EVA foam material and the polar PU film, thus effectively bonding the weakly-polar EVA foam material with the polar PU film together; the adhesive is high in peel strength, simple in bonding process, and capable of being used by replacing a hot-melt adhesive and reducing the production cost in case of being applied to bonding the EVA foam material with the polar PU film.

Description

technical field [0001] The invention relates to an adhesive, in particular to an adhesive for laminating an EVA foam material and a PU film and a preparation method thereof. Background technique [0002] It is known that EVA foam material is prepared by foaming ethylene-vinyl acetate copolymer, and has low polarity, while PU (polyurethane) film is a high-polarity material, and the interface between the two is difficult to bond strongly. In the prior art, hot-melt adhesive is mainly used to bond the two, so as to realize the lamination of the two. However, the cost of hot-melt adhesive is relatively high. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a low-cost adhesive that can replace hot melt adhesive to realize the bonding of EVA foam material and PU film. [0004] The present invention also provides a preparation method of the adhesive. [0005] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C08G18/66C08G18/42C08G18/44C08G18/48B32B7/12B32B27/08
Inventor 韩永进刘成刚刘少勇
Owner JIANGSU HUADA NEW MATERIAL CO LTD
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