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EVA (Ethylene-Vinyl Acetate Copolymer) foaming and damping material and preparation method thereof

A shock-absorbing material and foaming agent technology, which is applied in the field of EVA foam shock-absorbing materials and its preparation, can solve shock-absorbing performance, aging resistance, impact resistance and flex fatigue resistance, difficult process operation, rubber Viscous and other problems, to achieve excellent aging resistance, easy process operation, the effect of small elasticity

Active Publication Date: 2012-10-03
晋江市诚长鞋材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, a variety of shock-absorbing foaming materials based on EVA and natural rubber and various additives have been developed at home and abroad. However, the existing materials have high rubber viscosity, poor oil resistance, difficult process operation, and shock-absorbing products. Performance, aging resistance, impact resistance and flex fatigue resistance are poor, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Step 1, the following components by weight are 10 parts of EVA, 10 parts of NBR, 30 parts of PVC, 10 parts of epoxy soybean oil, 10 parts of calcium carbonate, 0.5 parts of barium stearate, 1 part of zinc oxide, and 10 parts of plasticizer Put 0.5 parts of accelerator and 0.5 parts into the internal mixer, start the internal mixer to stir, press down the weight hammer to mix when the material is agglomerated, turn the material once every time the mixing temperature rises by 2 °C, and pour the material at 127±2 °C;

[0018] Step 2: Enlarge the distance between the two rollers of the first mill to 8mm, and pass the material three times between the two rollers, and then distribute the material to the second mill for thinning; The distance between the two rollers of the first mill is reduced to no gap, and the remaining materials are thinly packed on the first mill;

[0019] Step 3: put the material into the internal mixer again for mixing, when the internal mixing temperat...

Embodiment 2

[0025] Step 1, the following components by weight are 30 parts of EVA, 30 parts of NBR, 50 parts of PVC, 20 parts of epoxy soybean oil, 20 parts of calcium carbonate, 1 part of barium stearate, 3 parts of zinc oxide, and 15 parts of plasticizer Put 1 part and 1 part of accelerator into the internal mixer, start the internal mixer to stir, press down on the weight hammer for mixing when the material is agglomerated, turn over the material every time the mixing temperature rises by 2°C, and pour the material when it is 127±2°C;

[0026] Step 2: Enlarge the distance between the two rollers of the first mill to 8mm, and pass the material three times between the two rollers, and then distribute the material to the second mill for thinning; The distance between the two rollers of the first mill is reduced to no gap, and the remaining materials are thinly packed on the first mill;

[0027] Step 3: Put the material into the internal mixer again for mixing. When the internal mixing tem...

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Abstract

The invention discloses an EVA (Ethylene-Vinyl Acetate Copolymer) foaming and damping material and a preparation method thereof. The EVA foaming and damping material is prepared from the following components in parts by weight: 10-30 parts of EVA, 10-30 parts of NBR (Nitrile-Butadiene Rubber), 30-50 parts of PVC (Polyvinylchlorid), 10-20 parts of epoxidized soybean oil, 10-20 parts of calcium carbonate, 1-3 parts of foaming agent, 0.5-1 part of cross-linking agent, 0.5-1 part of barium stearate, 1-3 parts of zinc oxide, 10-15 parts of plasticizer and 0.5-1 part of accelerator. Compared with the prior art, the EVA foaming and damping material has the characteristics that nitrile-butadiene rubber added in a formula is high in oil resistance, easy in process operation and small in elasticity, so that a product has favorable damping performance. The polyvinylchloride has the advantages of non-flammablility, high strength, favorable weather resistance, excellent geometrical stability and endows excellent ageing resistance for the product. The added epoxidized soybean oil can be used as a lubricating agent for reducing the viscosity of the materials, improving the flowability of the materials and reducing the difficulty coefficient of process operation, is also a widely-used rubber softener and endows excellent softness for the product; and in addition, the epoxidized soybean oil is a PVC environment-friendly plasticizer and stabilizer, and thus the stability of the products is improved.

Description

technical field [0001] The invention relates to an EVA foam shock-absorbing material and a preparation method thereof. Background technique [0002] At present, a variety of shock-absorbing foaming materials based on EVA and natural rubber and various additives have been developed at home and abroad. However, the existing materials have high rubber viscosity, poor oil resistance, difficult process operation, and shock-absorbing products. Performance, aging resistance, impact resistance and flex fatigue resistance are poor, and the cost is relatively high. Contents of the invention [0003] The main purpose of the present invention is to overcome the shortcomings of the prior art, and provide an EVA foamed shock-absorbing material with excellent shock-absorbing performance and relatively simple production process and a preparation method thereof. [0004] The present invention adopts following technical scheme: [0005] An EVA foam shock-absorbing material is made of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/08C08L31/04C08L9/02C08K13/02C08K5/1515C08K3/26C08K5/098C08K3/22C08J9/10B29B7/28B29C35/02
Inventor 林承业
Owner 晋江市诚长鞋材有限公司
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