High-resilience chemical crosslinked polyethylene foam material and preparation method thereof

A polyethylene foaming and chemical cross-linking technology, which is applied in the field of high-resilience chemical cross-linked polyethylene foaming materials and its preparation, can solve problems such as poor rebound effect, short service life, and easy collapse of cells, and achieve The effect of improving the service life, improving the strength and improving the rebound effect

Inactive Publication Date: 2012-09-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the rebound effect of domestic XPE foam materials is poor, the closed cell rate is low, the cells are easy to collapse, gas is easy to escape during the preparation process, and the service life is short. Therefore, the development of composite material

Method used

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  • High-resilience chemical crosslinked polyethylene foam material and preparation method thereof
  • High-resilience chemical crosslinked polyethylene foam material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Step 1: First, 80 parts of low-density polyethylene (MI0.8) and 20 parts of polyethylene-vinyl acetate (EVA, VA content 20%) are selected as the thermoplastic elastomer, and put into an internal mixer for banburying, and the resin is melted and mixed Finally, add 20 parts of azodicarbonamide and 2 parts of zinc oxide as a foaming aid to the internal mixer for 3 minutes; finally add 0.5 parts of crosslinking agent dicumyl peroxide and trimethylol Add 0.3 parts of propane trimethacrylate into the internal mixer and banbury for 2 minutes, then take it out and carry out open milling. The temperature of banburying and opening refining is controlled at 100-130°C.

[0044] Step 2: Crushing the blend obtained by kneading and adding it to a twin-screw extruder for granulation at a temperature of 100-125° C. and a screw speed of 30 r / min.

[0045] Step 3 Add the pellets to a single-screw extruder to extrude the mother sheet at a temperature of 100-125° C. and a screw speed of 30...

Embodiment 2

[0050]Step 1: Put 80 parts of low-density polyethylene (MI0.8) and 20 parts of EPDM into an internal mixer for internal mixing. After the resins are melted and mixed, mix 10 parts of azodicarbonamide 2 parts, 2 parts of zinc oxide, an auxiliary foaming agent, were added to the banbury mixer for 3 minutes; finally, 0.5 parts of cross-linking agent diisolidene peroxide, 0.3 parts of auxiliary cross-linking agent trimethylolpropane trimethacrylate Add in the internal mixer and banbury for 2 minutes, take it out and start refining. The temperature of banburying and opening refining is controlled at 100-130°C.

[0051] Step 2: Pulverize the blend obtained by kneading and add it to a twin-screw extruder for granulation. The temperature is 100-125° C., and the screw speed is 30 r / min.

[0052] Step 3 Add the pellets to the single-screw extruder to extrude the mother sheet at a temperature of 100-125°C and a screw speed of 30r / min to obtain a sheet with a thickness of 2mm and a width...

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Abstract

The invention discloses a high-resilience chemical crosslinked polyethylene foam material and a preparation method thereof. The material mainly comprises the following components by weight: 50-100 parts of polyethylene resin, 0.1-50 parts of elastomer, 5-50 parts of foaming agent, 0.1-5 parts of cross-linking agent, 0.1-10 parts of foaming assistant, and 0.1-5 parts of cross-linking assistant; the components are internally mixed, pelletized, mixed, extruded, and formed into non-cross-linking extruded master slices, and then the master slices are cross-linked and foamed by heating. According to the invention, the elastomer is mixed into PE (poly ethylene) resin to form the foam material, so the resilience of the product is high; meanwhile, the product further has high elongation at break and tensile strength, excellent toughness, and stable chemical and physical properties, so that the product can be widely used in the fields of packaging, sports and protection, transportation and the like.

Description

【Technical field】 [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a high-resilience chemically cross-linked polyethylene foam material and a preparation method thereof. 【Background technique】 [0002] At present, the rebound effect of domestic XPE foam materials is poor, the closed cell rate is low, the cells are easy to collapse, gas is easy to escape during the preparation process, and the service life is short. Therefore, the development of composite materials can effectively improve the rebound of foam materials. The effect is to improve the closed cell rate and the strength of the resin matrix, and at the same time, it can effectively prolong the service life of the material, which is conducive to energy saving and environmental protection. 【Content of invention】 [0003] The object of the present invention is to overcome the deficiencies of the prior art, and provide a high-resilience chemically cross-linked poly...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L7/00C08L9/06C08L9/02C08L11/00C08L9/00C08L23/28C08K5/14C08J9/10C08J9/08
Inventor 公维光王威郑柏存林珩易红玲魏婷
Owner EAST CHINA UNIV OF SCI & TECH
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