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Modified EVA hot melt adhesive and preparation method thereof

A hot-melt adhesive modification technology, applied in the direction of adhesives, non-polymer adhesive additives, polymer adhesive additives, etc., can solve the problem of hot-melt adhesive initial adhesion and poor permeability, hot-melt adhesive cohesion strength Poor, toughness and elasticity are not enough, to achieve the effect of high temperature resistance and low temperature resistance performance improvement, enhanced compatibility, and improved adhesion

Active Publication Date: 2020-09-11
四川优力赛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although EVA sealing glue has so many advantages, there are still some defects in the following aspects: (1) due to the insufficient toughness and elasticity of EVA material, its low temperature resistance is poor; The EVA molecular weight used in box hot melt adhesive is small, which makes the cohesive strength of the prepared hot melt adhesive poor; (3) the elasticity (rubber) of the EVA material itself is insufficient, which leads to the initial adhesion and penetration of the prepared hot melt adhesive. Poor sex

Method used

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  • Modified EVA hot melt adhesive and preparation method thereof
  • Modified EVA hot melt adhesive and preparation method thereof
  • Modified EVA hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In embodiment 1, we controlled the amount of other components to be constant and only changed the ratio of EVA resin and POP resin, and did 6 groups of gradient experiments, and the experimental proportions and experimental results are shown in the following table:

[0040] Table 1.1 Ratio distribution table of raw material components in each group of experimental groups in Example 1

[0041]

[0042] The preparation process parameters of hot melt adhesive compositions A-1 to A-6 are the same, wherein, taking A-1 as an example:

[0043]The preparation method of the composition: each raw material is weighed according to the formula in Table 1, and the raw materials of each component are sequentially added to a heating and stirring device for mixing.

[0044] A preparation method of modified EVA hot melt adhesive:

[0045] S1: Set the temperature of the reactor to 180°C. When the temperature of the reactor rises to 100°C, add 18kg of polyethylene wax, control the spee...

Embodiment 2

[0058] On the basis of A-3, further adjust the ratio of the total weight of POP resin and APAO resin to the weight of EVA resin, and find through a large number of research experiments that the ratio of the total weight of POP resin and APAO resin to the amount of EVA resin It has a certain influence on the low temperature resistance and high temperature resistance of hot melt adhesives.

[0059] In the case of controlling the weight parts of other component raw materials to be consistent, the ratio of the total weight parts of POP resin and APAO resin to the amount of EVA resin was changed to obtain a total of six groups of experiments from B-1 to B-6.

[0060] A kind of preparation method of modified EVA hot-melt adhesive refers to embodiment 1.

[0061] Table 2.1, each group experimental group raw material composition distribution table in embodiment 2

[0062]

[0063] The prepared compositions B-1 to B-6 were tested for high temperature resistance and low temperature ...

Embodiment 3

[0070] On the basis of B-3, the ratio of styrene-modified C5 petroleum resin and rosin pentaerythritol ester was further adjusted. Through a large number of experiments, it was found that the ratio of tackifying resin has a positive effect on the high and low temperature resistance of hot melt adhesives, and the penetration and quick drying properties. Significant influence. It is known from Example 2 that the best ratio of EVA, POP, and APAO is the group of Example B-3.

[0071] A kind of preparation method of modified EVA hot-melt adhesive refers to embodiment 1.

[0072] Table 3.1, each group experimental group raw material composition distribution table in embodiment 3

[0073]

[0074] Table 3.2, C-1 to C-6 carton high temperature resistance test after sealing with hot melt adhesive

[0075]

[0076] Table 3.3, C-1 to C-6 Carton low temperature resistance test after sealing with hot melt adhesive

[0077]

[0078]

[0079] Table 3.4, C-1 to C-6 box sealing ...

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Abstract

The invention relates to the technical field of modified polymer materials, in particular to a modified EVA hot melt adhesive and a preparation method thereof. The modified hot melt adhesive is prepared from the following raw materials in parts by weight: 25-30 parts of EVA resin, 5-10 parts of POP resin, 5-10 parts of APAO resin, 35-45 parts of tackifying resin, 15-20 parts of a lubricant and 0.3-1 part of an antioxidant. The tackifying resin is styrene modified C5 petroleum resin and rosin pentaerythritol ester; and the lubricant is one or more of polyethylene wax, Fischer-Tropsch wax and microcrystalline wax. By introducing the polyolefin plastomer POP and the amorphous alpha-olefin copolymer APAO, the high and low temperature resistance and the binding power to cartons of the existingEVA adhesive are greatly improved. the production and preparation process is simple, wherein no solvent is used, no chemical reaction exists, no harmful gas is discharged. The adhesive belongs to an environment-friendly adhesive; wherein point spraying and strip spraying are carried out under the melting condition, rapid curing can be achieved to achieve short-time attachment and material breaking, and the device is suitable for rapid assembly line box sealing operation.

Description

technical field [0001] The invention relates to the technical field of modified polymer materials, in particular to a modified EVA hot melt adhesive and a preparation method thereof. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. It is a non-toxic, odorless and environmentally friendly chemical product. Due to the fast bonding speed of hot melt adhesive , does not contain any solvent, simple production process, low cost, less equipment investment when customers use it, convenient use and high efficiency, so it is widely used in food packaging, fast assembly line packaging and sealing, household appliance sealing, book binding and other industries. [0003] In the field of hot-melt adhesive box sealing, EVA hot-melt adhesives are widely used because of their wide source of raw materials, low cost and high bonding strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J151/08C09J123/02C09J11/08C09J11/06
CPCC08L2201/08C08L2205/035C09J11/06C09J11/08C09J123/0853C08L51/08C08L23/02C08L57/02C08L93/04C08L23/06C08K5/1345C08K5/526
Inventor 刘明李方伟
Owner 四川优力赛新材料科技有限公司