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Light, waterproof and abrasion-resistant EVA material

A lightweight, wear-resistant phase technology, applied in the field of EVA materials, can solve the problems of reduced shear resistance, increased product process time and process costs, loss of softness and elasticity of vinyl acetate copolymers, etc.

Inactive Publication Date: 2016-08-31
FUJIAN PROVINCE JINJIANG CITY HUAYIN SHOE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest technical problem in the above technical solution is that the silsesquioxane in the above application text needs to be prepared separately, which increases the process time and process cost of the product, and the yield of the finished product is low.
In addition, although it improves the water resistance and hardness of the vinyl acetate copolymer, it loses the softness and elasticity of the vinyl acetate copolymer, and when applied to specific products, the shear resistance of the product decreases

Method used

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  • Light, waterproof and abrasion-resistant EVA material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A light wear-resistant and waterproof EVA material, comprising the following materials in parts by weight, 30 parts of EVA, 10 parts of natural rubber, 1 part of polyvinylpyrrolidone, 10 parts of wear-resistant agent, and 3 parts of foaming agent;

[0027] The VA weight percentage contained in the EVA is 40%.

[0028] The EVA material in the present embodiment adopts the following steps to prepare:

[0029] a. Heat EVA and natural rubber to molten state respectively to obtain EVA melt and natural rubber melt. The EVA and natural rubber in the melt state can flow and can penetrate each other when mixed together. Because EVA and natural rubber contain Unsaturated bonds, part of the EVA and natural rubber in the melt state will also undergo polymerization reactions to increase the degree of cross-linking between EVA and natural rubber;

[0030] B, under constant temperature, EVA melt, natural rubber melt, blowing agent, wear-resisting agent and polyvinylpyrrolidone are mi...

Embodiment 2

[0033] A light wear-resistant and waterproof EVA material, comprising the following materials in parts by weight, 45 parts of EVA, 15 parts of natural rubber, 5 parts of polyvinylpyrrolidone, 15 parts of white carbon black, and 15 parts of hydrogen;

[0034] The EVA containing VA weight percentage is 70%.

[0035]The above-mentioned EVA material is prepared by the following steps: d, heating EVA and natural rubber to a molten state respectively to obtain an EVA melt and a natural rubber melt; Grinding phase is mixed evenly with polyvinylpyrrolidone to obtain a preliminary mixture; f, the preliminary mixture is put into a vacuum airtight container at a constant temperature, and then hydrogen gas is passed into the mixture until the pressure of the airtight container reaches 1.5 atmospheres, keeping 5h; wherein the constant temperature in step e is the same as the constant temperature in step f, which is 160°C, and the constant temperature is a temperature that can make both the...

Embodiment 3

[0038] A light wear-resistant and waterproof EVA material comprises the following materials in parts by weight: 45 parts of EVA, 15 parts of natural rubber, 5 parts of polyvinylpyrrolidone, 30 parts of white carbon black, and 15 parts of hydrogen.

[0039] The EVA containing VA weight percentage is preferably 70%

[0040] The above-mentioned EVA material is prepared by the following steps: d, heating EVA and natural rubber to a molten state respectively to obtain an EVA melt and a natural rubber melt; Grinding phase is mixed evenly with polyvinylpyrrolidone to obtain a preliminary mixture; f, the preliminary mixture is put into a vacuum airtight container at a constant temperature, and then hydrogen gas is passed into the mixture until the pressure of the airtight container reaches 1.5 atmospheres, keeping 5h; wherein the constant temperature in step e is the same as the constant temperature in step f, which is 150°C, and the constant temperature is a temperature that can make...

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Abstract

The invention belongs to the field of EVA materials, and particularly relates to a light, waterproof and abrasion-resistant EVA material. The light, waterproof and abrasion-resistant EVA material is prepared from, by weight, 30-45 parts of EVA, 10-15 parts of natural rubber, and 1-5 parts of polyvinylpyrrolidone. The light, waterproof and abrasion-resistant EVA material further comprises an abrasion-resistant phase which is an abrasion-resistant agent or white carbon black or zinc hydroxystannate; when the abrasion-resistant phase is an abrasion-resistant agent, the number of parts by weight is 10-15; when the abrasion-resistant phase is white carbon black or zinc hydroxystannate, the number of parts by weight is 20-30. The light, waterproof and abrasion-resistant EVA material further comprises a foaming phase which is a foaming agent or a small-density inert gas; when the foaming phase is a foaming agent, the number of parts by weight is 3-10; when the foaming phase is a small-density inert gas, the number of parts by weight is 10-15, and the small-density inert gas is hydrogen or helium or nitrogen or argon. The hardness and abrasion resistance of the light, waterproof and abrasion-resistant EVA material are effectively improved, and meanwhile the softness of the EVA material is also maintained.

Description

technical field [0001] The invention belongs to the field of EVA materials, in particular to a lightweight, wear-resistant and waterproof EVA material. Background technique [0002] Ethylene-vinyl acetate copolymer, also known as EVA resin, is a solid at room temperature, and when heated and melted to a certain extent, it becomes a liquid that can flow and has a certain viscosity. In the solid state, it has good flexibility, transparency, surface gloss, chemical stability, anti-aging and ozone resistance, and is non-toxic; it still has good windability when heated to 50 ° C, and it is compatible with fillers. Good blendability, good coloring and forming processability. Therefore, in actual production and life, this substance can be used as various jigsaw puzzles, foam shoe materials, film EVA, wires and cables, and hot melt adhesives. [0003] However, in practical applications, EVA materials also have various defects. For example, when used in jigsaw puzzles and foamed sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L7/00C08L39/06C08K3/36C08K3/24C08J9/12
CPCC08L23/0853C08J9/122C08J2203/06C08J2323/08C08L2203/14C08L2205/03C08L7/00C08L39/06C08K3/36C08K3/24
Inventor 黄思坦
Owner FUJIAN PROVINCE JINJIANG CITY HUAYIN SHOE MATERIALS
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