Radiation crosslinked polyethylene foam as well as preparation method and application thereof

A technology of polyethylene foam and radiation cross-linking, which is applied in the field of foam, can solve the problems of electromagnetic shielding performance and wave-absorbing performance that need to be improved, high foaming density of foam, and low production efficiency, and achieve good wave-absorbing performance and electromagnetic shielding performance, low foam density, and high production efficiency

Pending Publication Date: 2020-08-28
SHENZHEN CHANGYUAN TEFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to make up for the defects of the prior art, the present invention provides radiation cross-linked polyethylene foam and its preparation method and application, which solves the environmental problems caused by the radiation cross-linked polyethylene foam products with electromagnetic shielding function and wave absorption function in the prior art. The pollution is relatively large, the process is complicated, the production efficien

Method used

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Examples

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Effect test

preparation example Construction

[0060] In a second aspect, a method for preparing the above-mentioned radiation-crosslinked polyethylene foam is provided, comprising the steps of:

[0061] Mixing and granulation: mixing and granulating azodicarbonamide and low-density polyethylene to obtain foaming agent masterbatch; mixing and granulating foaming aid and low-density polyethylene to obtain foaming agent masterbatch ; The conductive powder and low-density polyethylene are banburyed and granulated to obtain a conductive masterbatch; the compatibilizer and low-density polyethylene are banburyed and granulated to obtain a compatibilizer masterbatch;

[0062] Extrusion molding: Mix the foaming agent masterbatch, foaming aid masterbatch, conductive masterbatch, compatibilizer masterbatch and low-density polyethylene in a screw extruder and extrude to obtain a substrate;

[0063] Radiation cross-linking: the above-mentioned substrate is radiated and cross-linked by a high-speed electron field to obtain a master she...

Embodiment 1

[0082] A radiation cross-linked polyethylene foam prepared from the following raw materials in parts by weight: 55 parts of low-density polyethylene, 8 parts of azodicarbonamide, and 9 parts of conductive powder , 0.7 parts of foaming aid and 3 parts of compatibilizer.

[0083] The low-density polyethylene has a melting point of 100-110°C and a melt index of 1-4g / 10min; the azodicarbonamide has a particle size of 10-15nm and a decomposition temperature of 200-220°C.

[0084] The conductive powder is conductive carbon black; the foaming aid is sodium bicarbonate; the compatibilizer is ethylene-octene copolymer grafted maleic anhydride.

[0085] Its preparation method comprises the following steps:

[0086] Mixing and granulation: mixing and granulating azodicarbonamide and low-density polyethylene to obtain foaming agent masterbatch; mixing and granulating foaming aid and low-density polyethylene to obtain foaming agent masterbatch ; Conductive powder and low-density polyethy...

Embodiment 2

[0091] A radiation cross-linked polyethylene foam prepared from the following raw materials in parts by weight: 58 parts of low-density polyethylene, 7 parts of azodicarbonamide, and 9 parts of conductive powder , 0.6 parts of foaming aid, 4 parts of compatibilizer; 0.8 part of sensitizer.

[0092] The low-density polyethylene has a melting point of 100-110°C and a melt index of 1-4g / 10min; the azodicarbonamide has a particle size of 10-15nm and a decomposition temperature of 200-220°C.

[0093] The conductive powder is conductive carbon black; the foaming aid is ammonium carbonate; the compatibilizer is polyethylene grafted maleic anhydride; and the sensitizer is zinc acetate.

[0094] Its preparation method comprises the following steps:

[0095] Mixing and granulation: mixing and granulating azodicarbonamide and low-density polyethylene to obtain foaming agent masterbatch; mixing and granulating foaming aid and low-density polyethylene to obtain foaming agent masterbatch ...

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Abstract

The invention discloses radiation crosslinked polyethylene foam as well as a preparation method and application thereof. The radiation cross-linked polyethylene foam is mainly prepared from low-density polyethylene, azodicarbonamide, conductive powder, a foaming aid and a compatilizer as raw materials through mixing granulation, extrusion molding, radiation cross-linking and foaming, and the weight ratio of the conductive powder to the foaming aid to the compatilizer is (8-10): (0.3-1): (1-5). The problems that in the prior art, a radiation cross-linked polyethylene foam product with the electromagnetic shielding function and the wave absorbing function causes large pollution to the environment, and the technical problems of complex process, low production efficiency, high process cost, high foam foaming density and poor electromagnetic shielding performance and wave-absorbing performance of foam products are solved, and the radiation crosslinked polyethylene foam products are better in wave-absorbing performance, better in electromagnetic shielding performance, more environment-friendly, higher in production efficiency and lower in foaming density.

Description

technical field [0001] The invention relates to the technical field of foam, in particular to radiation cross-linked polyethylene foam and its preparation method and application. Background technique [0002] With the development of modern science and technology, electronics, electricity and communication technologies have been widely used, but the operation of electronic and electrical equipment will produce electromagnetic radiation of various frequencies. While people are getting convenience in their daily life, they are also suffering from more and more serious health threats. In order to reduce and avoid the harm caused by electromagnetic radiation to the human body, the demand for electromagnetic shielding materials is increasing. At present, the electromagnetic shielding materials on the market are mainly metal materials. This electromagnetic shielding material has high quality, high cost, and does not have the function of cushioning and shock absorption. [0003] R...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L51/06C08K3/04C08K5/098C08K3/22C08K7/06C08K3/08C08J9/10C08J9/08C08J3/22C08J3/24C08J3/28B29C69/00B29C44/20B29C48/07B29C48/92B29C35/10B29B9/00
CPCC08J9/103C08J9/08C08J9/0061C08J9/0066C08J9/0023C08J9/0085C08J9/0095C08J3/226C08J3/24C08J3/28B29C48/0012B29C48/07B29C48/92B29C35/0866B29C35/10B29B9/00C08J2323/06C08J2423/06C08J2451/06C08J2203/02C08J2203/04C08J2203/18C08J2205/052B29C2948/92704B29C2948/9259B29C2035/0877
Inventor 马琦入魏立东郭宇张新可孙中立
Owner SHENZHEN CHANGYUAN TEFA TECH CO LTD
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