EVA foam material taking four components as base material and preparation method of EVA foam material

A technology of foaming materials and quadruples, which is applied in the field of EVA foaming materials and its preparation, can solve the problems of not being able to satisfy the cell distribution, low cost of aging resistance, and high resilience at the same time, and achieve good physical and mechanical properties, durability Excellent aging performance and uniform cell distribution

Inactive Publication Date: 2015-11-11
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Most of the above-mentioned patent documents involve binary or ternary composite material foaming systems, and the involved quaternary composite material foaming systems also have deficiencies, which cannot meet the requirements of uniform cell distribution, low density, and high resilience at the same time. , excellent aging resistance, low cost, and environmental friendliness have limited its application.

Method used

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  • EVA foam material taking four components as base material and preparation method of EVA foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Grinding and mixing: each raw material is weighed according to the following formula ratio, and then it is ground and mixed;

[0028] 70 parts of ethylene-vinyl acetate copolymer

[0029] 30 parts of EPDM rubber

[0030] Starch phosphate 5 parts

[0031] Nano calcium carbonate 5 parts

[0032] Foaming agent 2.5 parts

[0033] 0.65 parts of crosslinking agent

[0034] Combined foaming aid 2.8 parts

[0035] (2) Mixing: Put the ground and mixed raw materials into a double-roll mill, set the milling temperature to 110-115°C, cut and pass for 10 minutes, and then release the sheet;

[0036] (3) Molding: Set the temperature of the flat vulcanizer to 130°C, preheat for 20 minutes, and slowly pressurize to 10MPa, then raise the molding temperature to 165°C, keep the pressure constant, and press for 18 minutes;

[0037] (4) Pressure relief and foaming: release the pressure of the flat vulcanizing machine, make the hot-melt sheet expand and pop up, and complete the foa...

Embodiment 2

[0039] (1) Grinding and mixing: each raw material is weighed according to the following formula ratio, and then it is ground and mixed;

[0040] 90 parts of ethylene-vinyl acetate copolymer

[0041] EPDM rubber 10 parts

[0042] Starch phosphate 5 parts

[0043] 5 parts of heavy calcium carbonate

[0044] Foaming agent 2 parts

[0045] 0.80 parts of crosslinking agent

[0046] Combined foaming aid 2.1 parts

[0047] (2) Mixing: put the ground and mixed raw materials into a double-roll mill, set the milling temperature to 110-113°C, cut and pass for 8 minutes, and then release the sheet;

[0048] (3) Molding: Set the temperature of the flat vulcanizer to 125°C, preheat for 25 minutes, and slowly pressurize to 10MPa, then raise the molding temperature to 165°C, keep the pressure constant, and press for 9 minutes;

[0049] (4) Pressure relief and foaming: release the pressure of the flat vulcanizing machine, make the hot-melt sheet expand and pop up, and complete the foamin...

Embodiment 3

[0051] (1) Grinding and mixing: each raw material is weighed according to the following formula ratio, and then it is ground and mixed;

[0052] 80 parts of ethylene-vinyl acetate copolymer

[0053] Butadiene rubber 20 parts

[0054] 9 parts cornstarch

[0055] 1 part heavy calcium carbonate

[0056] Foaming agent 2 parts

[0057] 0.65 parts of crosslinking agent

[0058] Combined foaming aid 2.1 parts

[0059] (2) Mixing: Put the ground and mixed raw materials into a double-roll mill, set the milling temperature to 110-112°C, cut and pass for 7 minutes, and then release the sheet;

[0060] (3) Molding: Set the temperature of the flat vulcanizer to 135°C, preheat for 15 minutes, and slowly pressurize to 10MPa, then raise the molding temperature to 155°C, keep the pressure constant, and press for 21 minutes;

[0061] (4) Pressure relief and foaming: release the pressure of the flat vulcanizing machine, make the hot-melt sheet expand and pop up, and complete the foaming in...

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Abstract

The invention provides an EVA foam material taking four components as base materials and a preparation method of the EVA foam material. The foam material comprises the following substances in parts by mass: 70-90 parts of ethylene-vinyl acetate copolymer, 10-30 parts of rubber, 1-9 parts of starch, 1-9 parts of calcium carbonate, and 4.6-7.3 parts of an additive, wherein the additive comprises a foaming agent, a cross-linking agent and a combined foaming aid. The foam material has the characteristics of being excellent in mechanical property, uniform in foam hole distribution, capable of realizing natural degradation, and the like, can be widely applied to shoe materials, jigsaw puzzle for kids, foamed floors, precise electronic instruments, electrical equipment, packing materials of medical instruments, and the like.

Description

technical field [0001] The invention relates to an EVA foam material with a quaternary component as a matrix and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] EVA foaming material refers to the foaming material made of ethylene-vinyl acetate copolymer (EVA) as raw material, and after adding other foaming aids, foaming by molding or injection molding. [0003] EVA-based foaming materials, as an important member of polymer-based foaming materials, are widely used in shoe materials, luggage linings, toy materials, sporting goods, building materials, electronic accessories, and automotive interiors. However, traditional EVA foam materials have disadvantages such as uneven distribution of cells, poor mechanical strength, poor elasticity, large compression set, poor weather resistance, and poor aging resistance, which will cause greater obstacles to subsequent production and use. limited. [0004] Patent CN103756111A d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/16C08L11/00C08L9/00C08L3/06C08L3/02C08L3/10C08K13/02C08K3/26C08K5/14C08K5/09C08K3/22C08K5/098C08J9/10
CPCC08L23/0853C08J2203/04C08J2323/08C08J2409/00C08J2411/00C08J2423/16C08K2201/011C08L2201/08C08L2203/14C08L2205/03C08L23/16C08L3/06C08K13/02C08K2003/265C08K5/14C08K5/09C08K2003/2296C08K5/098C08L9/00C08L3/02C08L3/10C08L11/00
Inventor 陈建定倪樱嫣蔡梦军
Owner EAST CHINA UNIV OF SCI & TECH
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