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A kind of eva hot melt adhesive material and preparation method thereof

A hot-melt adhesive and material technology, applied in the direction of adhesives, graft polymer adhesives, adhesive types, etc., can solve the problems of poor mechanical strength of EVA hot-melt adhesives that cannot meet the requirements of difficult-to-bond materials and corresponding fields. Not resistant to high and low temperature, etc., to achieve significant social and economic benefits, high bonding strength, and prevent glue seepage

Active Publication Date: 2015-12-02
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the obvious defects of EVA hot melt adhesives are: low bonding strength, no resistance to high and low temperature, no resistance to fat oil, inability to adapt to some difficult-to-bond materials and the requirements of corresponding fields, and the mechanical strength of EVA hot melt adhesives is poor, limiting its further application

Method used

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  • A kind of eva hot melt adhesive material and preparation method thereof
  • A kind of eva hot melt adhesive material and preparation method thereof
  • A kind of eva hot melt adhesive material and preparation method thereof

Examples

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preparation example Construction

[0039] The preparation method of described EVA hot-melt adhesive material comprises the following steps:

[0040] (1) In the pre-dried part of EVA and maleic anhydride, add an initiator to prepare EVA-MA;

[0041] (2) Heat and melt the remaining EVA, EVA-MA, LLDPE, waxes, plasticizers, antioxidants and other additives;

[0042] (3) After the material in step (2) is completely melted, add whitening agent and stir vigorously;

[0043](4) When the temperature of the blended material in step (3) reaches 100-150°C, add a tackifier and continue stirring in a molten state to obtain a uniform viscous liquid substance;

[0044] (5) After cooling the material obtained in step (4) for 1-24 hours, the EVA hot-melt adhesive material is obtained.

[0045] Steps (2)-(4) are carried out under an inert atmosphere, and the inert gas is one or more of nitrogen, helium, neon, argon, and krypton.

Embodiment 1

[0048] This example illustrates the hot melt adhesive composition, hot melt adhesive and their preparation methods provided by the present invention.

[0049] According to the following formula: by weight (g)

[0050] First, preheat EVA, MA and LLDPE in an oven at 80-100°C to remove the moisture contained therein. Then weigh 50g of EVA and 10g of MA and put them in the reactor, then add 0.1~0.3g of initiator dicumyl peroxide (DCP), and react at 100~130°C for 1~3h to obtain the compatibilizer ethylene-vinyl acetate copolymer substance / maleic anhydride (EVA-MA);

[0051] Then add EVA, EVA-MA, modified nano-silica, paraffin wax, microcrystalline wax, dioctyl phthalate, antioxidant 1010, etc. into the reactor in sequence according to the quality shown in the table, and heat and melt; When the material is completely melted, add the brightener sodium distyrene biphenyl disulfonate and stir vigorously; when the temperature of the blended material reaches 100~150°C, add hydrogenated...

Embodiment 2~6

[0054] Each raw material was weighed according to the composition of raw materials in the following table, and the processing steps and process parameters were the same as in Example 1 to obtain a maleic anhydride graft-modified EVA hot-melt adhesive.

[0055]

[0056]

[0057]

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Abstract

The invention provides an EVA (ethylene-vinyl acetate) hot-melt adhesive material and a preparation method thereof. The EVA hot-melt adhesive material is prepared by carrying out blending modification through taking EVA / maleic anhydride (MA) as a compatibilizer, and linear low-density polyethylene (LLDPE) / modified white nanocarbon black / modified organic montmorillonite (OMMT) / lightweight CaCO3 and the like as main modifiers. The prepared hot-melt adhesive has excellent heat resistance, environmental stress cracking resistance and warping resistance and high cohesive strength, as well as excellent rheological property, the permeation and diffusion of colloid can be promoted, the adhesion property can be greatly improved, and the EVA hot-melt adhesive material can be widely applicable to the conventional fields of plastic, fiber textiles, woods and the like, as well as the specific fields of low-surface-energy difficult-to-sticking materials and the like, thus having wide practical application values. In addition, on the basis of guaranteeing the excellent adhesion property of the colloid, the colloid is adjustable in color, and especially applicable to high-strength adhesion of white or light-color samples.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to an EVA hot-melt adhesive material and a preparation method thereof. Background technique [0002] Hot melt adhesive is a kind of solvent-free solid plastic adhesive made by melting and mixing thermoplastic resin or thermoplastic elastomer as the main component, adding tackifying resin, wax, plasticizer and filler and other components. , within a certain temperature range, its physical state changes with temperature, but its chemical properties remain unchanged. It has the advantages of non-toxic, tasteless, no environmental pollution, and convenient preparation. It is an environmentally friendly chemical product. In the adhesive market in recent years, the annual output of hot melt adhesives in the world has been on the rise, and its growth rate is the highest among all kinds of adhesives. The varieties are becoming more and more diversified, and the appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J11/08C09J11/06C09J11/04
CPCC09J11/00C09J151/06
Inventor 郑玉婴曹宁宁
Owner FUZHOU UNIV
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