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Ethane-vinyl acetate copolymer hole-opening foaming profile and method for manufacturing same

A technology of vinyl acetate and its manufacturing method, which is applied in the field of ethylene-vinyl acetate copolymer open-cell foamed profiles and its manufacture, and can solve problems not mentioned above

Active Publication Date: 2008-09-03
常州美利晟高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN1982363 discloses a formula of shock-absorbing EVA foamed profile and its manufacturing method, and Chinese patent CN1982364 discloses a formula of high-elastic EVA foamed profile and its manufacturing method, but neither mentions the use of polyethylene resin as the base material , and has flame-retardant EVA open-cell foam profiles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First of all, after preparing the materials according to the following formula, fully mix the raw materials evenly:

[0033] 80 kg of ethylene-vinyl acetate copolymer; 20 kg of low-density polyethylene; 35 kg of calcium carbonate; 12 kg of azodicarbonamide; 0.72 kg of dicumyl peroxide; 0.08 kg of zinc stearate; 1.0 kg of silicone oil.

[0034] Next, prepare according to the following steps:

[0035] (1) The mixture is banburyed and mixed with a pressurized kneader, the banburying temperature is 115±2°C, and the time is 15±2 minutes;

[0036] (2) Mix the mixed mixture with an open mill, the temperature of which is 95-105°C, and the time is 7-10 minutes, and the actual modulus of the mold is accurate according to the formula and the mold after packaging. After weighing, carry out preforming (hydraulic press equipped with preforming mould), take it out after 8-10s;

[0037] (3) Put the preformed material obtained in step (2) into a laminator at a temperature of 140° C. f...

Embodiment 2

[0042] First of all, after preparing the materials according to the following formula, fully mix the raw materials evenly:

[0043] 80 kg of ethylene-vinyl acetate copolymer; 20 kg of low-density polyethylene; 35 kg of calcium carbonate; 12 kg of azodicarbonamide; 0.72 kg of dicumyl peroxide; 0.05 kg of stearic acid; 0.01 kg of urea.

[0044] Next, prepare according to the following steps:

[0045] (1) The mixture is banburyed and mixed with a pressurized kneader, the banburying temperature is 115±2°C, and the time is 15±2 minutes;

[0046] (2) Mix the mixed mixture with an open mill, the temperature of which is 95-105°C, and the time is 7-10 minutes, and pack it into pieces. According to the formula and the actual modulus of the mold, it is accurate Weighing. Then perform preforming (hydraulic press equipped with a preforming mold), and take it out after 8 to 10 seconds;

[0047] (3) Put the preformed material obtained in step (2) into a laminator at a temperature of 140° ...

Embodiment 3

[0052] First of all, after preparing the materials according to the following formula, fully mix the raw materials evenly:

[0053] 100 kg of ethylene-vinyl acetate copolymer; 20 kg of calcium carbonate; 15 kg of azodicarbonamide; 0.7 kg of dicumyl peroxide; 0.08 kg of zinc stearate.

[0054] Next, prepare according to the following steps:

[0055] (1) The mixture is banburyed and mixed with a pressurized kneader, the banburying temperature is 115±2°C, and the time is 15±2 minutes;

[0056] (2) Mix the mixed mixture with an open mill, the temperature of which is 95-105°C, and the time is 7-10 minutes, and pack it into pieces. According to the formula and the actual modulus of the mold, it is accurate Weighing. Then perform preforming (hydraulic press equipped with a preforming mold), and take it out after 8 to 10 seconds;

[0057] (3) Put the preformed material obtained in step (2) into a laminator at a temperature of 145° C. for 32 minutes to make an EVA primary foamed she...

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PUM

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Abstract

The invention discloses an ethene-vinyl acetate copolymer open foaming sheet and preparation method thereof. The ethene-vinyl acetate copolymer open foaming sheet comprises( by weight parts): mixture of ethene-vinyl acetate copolymer and low density polyethylene 100 parts; filler 0-40 parts; blowing agent 10-28 parts; crosslinking agent 0.5-1.0 parts; blowing promoter0.05-0.3 parts; flame retardant 0-65 parts; silicone oil or white oil 0-1.0 parts. The preparation method comprises mixing, banburing, roll mixing, preforming, once foaming, twice foaming. The invention can produce retardant and non-retardant ethene-vinyl acetate copolymer open foaming sheet with expansion ratio of 15-30.

Description

technical field [0001] The invention relates to an ethylene-vinyl acetate copolymer open-cell foam profile and a manufacturing method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) is a thermoplastic with rubber elasticity. In EVA molecules, due to the presence of vinyl acetate, the regularity of low-density polyethylene (LDPE) molecular chains is greatly reduced, and its crystallinity As a result, the ability of molecular chains to rotate internally during thermal motion is greatly improved, and the flexibility of molecular chains is improved, showing high elasticity macroscopically. LDPE foam has the advantages of toughness, good flexibility, and corrosion resistance, and can be used as a modifier for EVA foam materials. LDPE and EVA resin can be modified into a network polymer structure and a product with balanced open-cell bubbles through chemical cross-linking. [0003] Chinese patent CN1982363 discloses a formula of shock-absorbing EVA ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K5/42C08J9/04B29C67/20C08L23/06C08K3/00C08K5/14C08K5/09
Inventor 吴海宙
Owner 常州美利晟高分子科技有限公司
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