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Method for preparing ethylene vinyl acetate (EVA)/ thermoplastic urethane (TPU)/ polyolefin elastomer (POE) composite foaming material

A composite foaming and sheet technology, applied in the field of foaming material preparation, can solve the problems such as difficulty in giving full play to the performance advantages of ethylene-vinyl acetate copolymer, poor compatibility, etc., achieve excellent mechanical properties and use performance, improve phase The effect of capacitive and simple process

Active Publication Date: 2013-02-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between thermoplastic polyurethane and ethylene-vinyl acetate copolymer, it is difficult to give full play to the performance advantages of ethylene-vinyl acetate copolymer by directly using thermoplastic polyurethane to modify ethylene-vinyl acetate copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of EVA / TPU / POE composite foam material, comprising the following steps:

[0020] (1) Fully mix 3 parts by weight of EVA-g-MA, 55 parts by weight of EVA, 5 parts by weight of POE and 1.8 parts by weight of TPU in an internal mixer. The time is 5 min and the speed is 30 rpm / min;

[0021] (2) Add 1.5 parts by weight of foaming agent azodicarbonamide, 0.78 parts by weight of crosslinking agent dicumyl peroxide, 1 part by weight of zinc oxide, 0.3 parts by weight of stearic acid, 0.5 parts by weight of Zinc stearate and the talcum powder of 10 parts by weight join in the internal mixer, continue mixing 10min to obtain mixture at 30 rpm / min;

[0022] (3) Press the mixture obtained in step (2) into a sheet with a thickness of about 3 mm on an open double-roller mixer;

[0023] (4) Heat the mold embedded in the vulcanizing machine to 180 °C in advance, then evenly spray the silicone water-based emulsion release agent, and wait for the water vapor to evapo...

Embodiment 2

[0028] A preparation method of EVA / TPU / POE composite foam material, comprising the following steps:

[0029] (1) Fully mix 3 parts by weight of EVA-g-MA, 55 parts by weight of EVA, 5 parts by weight of POE and 3 parts of TPU in an internal mixer. 5 min, the speed is 30 rpm / min;

[0030] (2) Add 1.5 parts by weight of foaming agent azodicarbonamide, 0.78 parts by weight of crosslinking agent dicumyl peroxide, 1 part by weight of zinc oxide, 0.3 parts by weight of stearic acid, 0.5 parts by weight of Zinc stearate and the talcum powder of 10 parts by weight join in the internal mixer, continue mixing 10min to obtain mixture at 30 rpm / min;

[0031] (3) Press the mixture obtained in step (2) into a sheet with a thickness of about 3 mm on an open double-roller mixer;

[0032] (4) Heat the mold embedded in the vulcanizing machine to 180 °C in advance, then evenly spray the silicone water-based emulsion release agent, and wait for the water vapor to evaporate;

[0033] (5) Put the...

Embodiment 3

[0037] A preparation method of EVA / TPU / POE composite foam material, comprising the following steps:

[0038] (1) Fully mix 3 parts by weight of EVA-g-MA, 55 parts by weight of EVA, 5 parts by weight of POE and 5 parts of TPU in an internal mixer. 5 min, the speed is 30 rpm / min;

[0039] (2) Add 1.5 parts by weight of foaming agent azodicarbonamide, 0.78 parts by weight of crosslinking agent dicumyl peroxide, 1 part by weight of zinc oxide, 0.3 parts by weight of stearic acid, 0.5 parts by weight of Zinc stearate and the talcum powder of 10 parts by weight join in the internal mixer, continue mixing 10min to obtain mixture at 30 rpm / min;

[0040] (3) Press the mixture obtained in step (2) into a sheet with a thickness of about 3 mm on an open double-roller mixer;

[0041] (4) Heat the mold embedded in the vulcanizing machine to 180 °C in advance, then evenly spray the silicone water-based emulsion release agent, and wait for the water vapor to evaporate;

[0042] (5) Put the...

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Abstract

Disclosed is a method for preparing an ethylene vinyl acetate (EVA) / thermoplastic urethane (TPU) / polyolefin elastomer (POE) composite foaming material. The method includes fully and evenly mixing EVA, POE, EVA grafted maleic anhydride and TPU in an internal mixer, adding azodicarbonamide serving as a foaming agent, dicumyl peroxide serving as a cross-linking agent, an auxiliary foaming agent and talcum powders to the internal mixer for mixing to obtain a mixture, pressing the mixture on an open dual-roller mixing mill into sheets, feeding the sheets to a vulcanizing machine, and performing mould pressing, crosslinking and foaming forming to discharge the sheets to obtain the EVA / TPU / POE composite foaming material. By means of EVA-maleic anhydride (MA), the EVA / TPU composite material with good compatibility can be obtained, usage of 4, 4-diaminodiphenylmethane is avoided, the process is simple, costs are saved, and better performances are achieved; and simultaneously, a POE material is introduced to a system, so that important performance indexes of the prepared foaming material are well improved.

Description

technical field [0001] The invention relates to a preparation method of a foaming material, in particular to a preparation method of an EVA / TPU / POE composite foaming material. Background technique [0002] In recent years, the demand for ethylene-vinyl acetate copolymer (EVA) foaming materials has grown very rapidly. Although the downstream export demand has weakened under the impact of the global financial crisis, the compound annual growth rate of the market from 2006 to 2010 is still over 9 %, the market size in 2010 exceeded 18 billion yuan, and the compound annual growth rate exceeded 10%. It is estimated that the market size will reach 30 billion yuan by 2015. [0003] Ethylene-vinyl acetate (EVA) rubber and plastic products are new environmentally friendly plastic packaging materials, which have good cushioning, shock resistance, heat insulation, moisture resistance, and chemical corrosion resistance. They are non-toxic and non-absorbent. EVA rubber and plastic produ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L51/06C08L75/04C08K5/14C08K3/34C08J9/10C08J3/24
Inventor 邵亮马建中薛朝华邓富泉段洲洋吕斌
Owner SHAANXI UNIV OF SCI & TECH
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