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eva hot melt adhesive for refrigerator sealing

A hot-melt adhesive and sealing technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve problems such as reduced bonding performance and failure to meet requirements

Inactive Publication Date: 2017-07-11
SHANGHAI JENTAI NANO SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing hot-melt adhesives, especially EVA resin, when the temperature is below -10°C, its bonding performance drops rapidly, and it can't meet the requirements when it is used for refrigerator sealing.

Method used

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  • eva hot melt adhesive for refrigerator sealing
  • eva hot melt adhesive for refrigerator sealing
  • eva hot melt adhesive for refrigerator sealing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0043] As an embodiment of the present invention, the VA content in the EVA resin is 18-35% by weight, and the melt index is 25-400 g / 10min.

[0044] In EVA hot-melt adhesives, the lower the VA content, the higher the crystallinity increases the hardness; the higher the VA content, the lower the crystallinity and the greater the elasticity. The choice of EVA melt index is also very important. The smaller the melt index, the poorer the fluidity, the higher the strength, the higher the melting temperature, and the poorer the wetting and permeability of the adherend; better, but lower bond strength.

[0045] As a preferred embodiment of the present invention, the VA content in the EVA resin is 20-32% by weight, and the melt index is 30-350 g / 10min.

[0046] Vinyl fused ring mixture

[0047] Vinyl fused ring mixtures include acylated vinyl fused ring compounds and unacylated vinyl fused ring compounds selected from 2-vinyl-1-benzofuran or 2-vinyl- 1-Benzothiophene.

[0048] ...

Embodiment

[0143]

[0144] Test Results

[0145]

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Abstract

The invention discloses an EVA hot-melt adhesive for refrigerator sealing. The EVA hot-melt adhesive for refrigerator sealing is prepared from, by weight, 100 parts of EVA resin, 1-4 parts of a vinyl fused ring mixture, 30-50 parts of a tackifier, 10-15 parts of a viscosity modifier, 0.2-1 part of an antioxidant, 0.1-0.5 part of an initiator and 20-30 parts of filler, wherein the vinyl fused ring mixture is prepared from an acylated vinyl fused ring compound and a non-acylated vinyl fused ring compound, and the vinyl fused ring compounds are selected from 2-vinyl-1-benzofuran and 2-vinyl-1-benzothiophene.

Description

technical field [0001] The invention relates to the field of hot-melt adhesives, in particular to EVA hot-melt adhesives for sealing refrigerators, and also to a preparation method for EVA hot-melt adhesives for sealing refrigerators. Background technique [0002] Hot melt adhesive is known as "green" adhesive due to its solvent-free, pollution-free, fast curing speed, and good process performance. It is solid at room temperature, and when heated and melted to a certain extent, it becomes fluid and viscous. After melting, it becomes Light brown translucent body or white. The scope of application of hot-melt adhesives is getting wider and wider. It has expanded from the traditional packaging field (book binding, sanitary products) to clothing, shoemaking and other industries, and has also been used in refrigerators, cables and automobiles and other electronic and electrical fields. [0003] Existing hot-melt adhesives have problems such as low bonding strength, short service...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J123/08C09J11/04C09J11/06C09J11/08
CPCC08L2205/03C09J11/04C09J11/06C09J11/08C09J123/0853C09J2301/304C08L45/00C08L23/06C08K13/02C08K5/1535C08K5/45C08K2003/265
Inventor 史立秀林进森
Owner SHANGHAI JENTAI NANO SCI & TECH CO LTD
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