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Anti-aging EVA (Ethylene Vinyl Acetate) hot melt adhesive film and preparation method thereof

A hot-melt adhesive film and anti-aging technology, which is applied in the field of EVA hot-melt adhesive, can solve the problems of EVA adhesive film falling off, and achieve the effect of improving bonding strength and good heat resistance

Pending Publication Date: 2022-05-10
GUANGDONG HUIQI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many defects in EVA glue at present. Although EVA hot melt adhesive for wood edge sealing has good comprehensive properties, the thickness of the glue layer must be controlled in the bonding process, and the laminated materials are bonded tightly. The temperature is high, and the bonding temperature of the glue must be controlled. In actual use, the EVA film is prone to peeling off in high temperature and humid environments.

Method used

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  • Anti-aging EVA (Ethylene Vinyl Acetate) hot melt adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An aging-resistant EVA hot-melt adhesive film, comprising the following components by weight:

[0028] 40 parts of EVA main resin; 1 part of epichlorohydrin rubber elastomer; 10 parts of polyisocyanate compound with urethane bond; 3 parts of tackifier; 0.1 part of initiator; 0.01 part of antioxidant.

[0029] The preparation method of this aging-resistant EVA hot-melt adhesive film comprises following preparation steps:

[0030] S1: Add EVA main resin, epichlorohydrin rubber elastomer, polyisocyanate compound with urethane bond, tackifier, initiator and antioxidant into a high-speed mixer and mix evenly to obtain a mixed material;

[0031] S2: Put the mixed material into a screw extruder and melt and extrude at 140°C, and then go through the steps of spreading, cooling, drawing and winding to obtain an EVA hot-melt adhesive film with high water vapor barrier property.

Embodiment 2

[0033] An aging-resistant EVA hot-melt adhesive film, comprising the following components by weight:

[0034] 50 parts of EVA main resin; 3 parts of epichlorohydrin rubber elastomer; 12 parts of polyisocyanate compound with urethane bond; 7 parts of tackifier; 0.5 part of initiator; 0.5 part of antioxidant.

[0035] The preparation method of this aging-resistant EVA hot-melt adhesive film comprises following preparation steps:

[0036] S1: Add EVA main resin, epichlorohydrin rubber elastomer, polyisocyanate compound with urethane bond, tackifier, initiator and antioxidant into a high-speed mixer and mix evenly to obtain a mixed material;

[0037] S2: Put the mixed material into a screw extruder and melt and extrude at 140°C, and then go through the steps of spreading, cooling, drawing and winding to obtain an EVA hot-melt adhesive film with high water vapor barrier property.

Embodiment 3

[0039] An aging-resistant EVA hot-melt adhesive film, comprising the following components by weight:

[0040] 60 parts of EVA main resin; 5 parts of epichlorohydrin rubber elastomer; 15 parts of polyisocyanate compound with urethane bond; 10 parts of tackifier; 1 part of initiator; 1 part of antioxidant.

[0041] The preparation method of this aging-resistant EVA hot-melt adhesive film comprises following preparation steps:

[0042] S1: Add EVA main resin, epichlorohydrin rubber elastomer, polyisocyanate compound with urethane bond, tackifier, initiator and antioxidant into a high-speed mixer and mix evenly to obtain a mixed material;

[0043] S2: Put the mixed material into a screw extruder and melt and extrude at 140°C, and then go through the steps of spreading, cooling, drawing and winding to obtain an EVA hot-melt adhesive film with high water vapor barrier property.

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Abstract

The invention discloses an anti-aging EVA (Ethylene Vinyl Acetate) hot melt adhesive film and a preparation method thereof. The anti-aging EVA hot melt adhesive film comprises 40-60 parts of EVA matrix resin; 1-5 parts of an epichlorohydrin rubber elastomer; 10 to 15 parts of a polyisocyanate compound with a carbamate bond; 3 to 10 parts of a tackifier; 0.1 to 1 part of an initiator; and 0.01 to 1 part of an antioxidant. According to the hot melt adhesive film, on the basis of EVA matrix resin, the epichlorohydrin rubber elastomer, the initiator and other materials are added, the epichlorohydrin rubber elastomer is rubber with a side group containing chlorine and a main chain containing an ether bond, and the hot melt adhesive film has good heat resistance, oil resistance, weather resistance and air tightness; through the action of the polyisocyanate compound of the carbamate bond and the initiator, all the materials can be fused with one another, the bonding strength, high temperature resistance, aging resistance and other properties of the EVA matrix resin can be improved, and meanwhile, the EVA matrix resin has a hard chain segment and a soft chain segment and can play waterproof and breathable roles.

Description

technical field [0001] The invention relates to the technical field of EVA hot-melt adhesives, in particular to an aging-resistant EVA hot-melt adhesive film and a preparation method thereof. Background technique [0002] Hot melt adhesive film is a film product with or without release paper, which can be conveniently operated continuously or intermittently, and can be widely used in bonding various fabrics, papers, polymer materials and metals. EVA hot melt adhesive film is a hot melt adhesive film product made of ethylene-vinyl acetate copolymer as the main raw material. The English abbreviation of ethylene-vinylacetate copolymer (ethylene-vinylacetate copolymer) is EVA, which is formed by the copolymerization of ethylene and vinyl acetate. It is an odorless, tasteless, non-toxic white or light yellow polymer. Due to the high cohesion of EVA and the small melting surface tension, it has thermal adhesion to almost all substances. The bonding range is extremely wide, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/35C09J7/10C09J123/08C09J11/08
CPCC09J7/35C09J7/10C09J123/0853C09J11/08C08L2201/08C09J2301/304C08L71/03C08L75/04
Inventor 宾家荃宾家齐
Owner GUANGDONG HUIQI NEW MATERIAL CO LTD
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