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

A technology of vinyl acetate and copolymer, 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: 2011-08-31
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, after preparing the materials according to the following formula, mix the ingredients thoroughly:

[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] Secondly, prepare according to the following steps:

[0035] (1) Mix the mixture with a pressure kneader at a temperature of 115±2°C and a time of 15±2 minutes;

[0036] (2) Use an open mill to open and remix the mixed mixture. The open temperature is 95~105℃, and the time is 7~10 minutes. After packing out, the actual modulus is accurate according to the formula and mold. After weighing the material, perform pre-forming (hydraulic press equipped with pre-forming mold), and take it out after 8-10 seconds;

[0037] (3) Put the preformed material obtained in step (2) into the laminator, the temperature is 140°C, and the time is 35 minutes, to make an E...

Embodiment 2

[0042] First, after preparing the materials according to the following formula, mix the ingredients thoroughly:

[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] Secondly, prepare according to the following steps:

[0045] (1) Mix the mixture with a pressure kneader at a temperature of 115±2°C and a time of 15±2 minutes;

[0046] (2) The banbury mixture is mixed with an open mill at a temperature of 95~105℃ and a time of 7~10 minutes, and the pieces are packaged out. According to the formula and the actual mold loading, the modulus is accurate Weigh the material. Perform pre-forming (hydraulic press equipped with pre-forming mold), take it out after 8-10s;

[0047] (3) Put the preformed material obtained in step (2) into a laminator, the temperature is 140°C, and the time is 38 minutes, to make an EVA primary foamed...

Embodiment 3

[0052] First, after preparing the materials according to the following formula, mix the ingredients thoroughly:

[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] Secondly, prepare according to the following steps:

[0055] (1) Mix the mixture with a pressure kneader at a temperature of 115±2°C and a time of 15±2 minutes;

[0056] (2) The banbury mixture is mixed with an open mill at a temperature of 95~105℃ and a time of 7~10 minutes, and the pieces are packaged out. According to the formula and the actual mold loading, the modulus is accurate Weigh the material. Perform pre-forming (hydraulic press equipped with pre-forming mold), take it out after 8-10s;

[0057] (3) Put the preformed material obtained in step (2) into a laminator, the temperature is 145°C, and the time is 32 minutes, to make an EVA primary foam board;

[0058] (4) Trimming and finishing the EVA pr...

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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 the EVA molecule, due to the presence of vinyl acetate, the regularity of the low-density polyethylene (LDPE) molecular chain is greatly reduced, and its crystallinity As a result, the internal rotation ability of the molecular chain in thermal motion is greatly improved, the flexibility of the molecular chain is improved, and the macroscopically exhibits high elasticity. LDPE foam has the advantages of strength, 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 shock-absorbing EVA foamed profile...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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