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Preparation method of crosslinked polyethylene electric-conductive foam material

A technology for cross-linking polyethylene and foaming materials, applied in the field of conductive foaming materials, can solve the problems of high addition of conductive carbon black, not improving dispersion and resistivity, affecting the conductivity and mechanical properties of materials, etc. The effect of small inter-action force, reduction of secondary mixing difficulty, and easy combination

Inactive Publication Date: 2018-01-19
ZHEJIANG RUNYANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product described in the invention has uniform and fine cells, excellent material surface quality, and good processing performance, but the addition of conductive carbon black is as high as 4.5%-5.5% or 6.5%-7.5%, which does not improve its dispersion and resistivity, which will affect Conductive and mechanical properties of materials

Method used

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  • Preparation method of crosslinked polyethylene electric-conductive foam material

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Embodiment 1

[0026] A method for preparing a cross-linked polyethylene conductive foaming material, comprising the following steps: (1) Weighing 5% azodicarbonamide, 0.1% conductive carbon black, 2% calcium carbonate, 0.1% antioxidant 1010, 0.1 % zinc stearate and 2% masterbatch 1398, respectively diluted with low-density polyethylene, the amount of low-density polyethylene is 10%, 0.5%, 4%, 0.2%, 0.15%, 3%, through the twin-screw Extrusion granulation by extruder, twin-screw extruder extrusion temperature 110°C; (2) Weigh 72.85% low-density polyethylene and mix evenly with the granules prepared in step (1); (3) Mix the mixed materials , extruded into sheets by a single-screw extruder and wound up. The process conditions of the single-screw extruder are: the temperature of the first zone is 150°C, the temperature of the second zone is 140°C, the temperature of the third zone is 120°C, and the temperature of the fourth zone is 110°C. The temperature in the fifth zone is 100°C, the temperatu...

Embodiment 2

[0028] A method for preparing a cross-linked polyethylene conductive foaming material, comprising the following steps: (1) Weighing 7% azodicarbonamide, 0.2% conductive carbon black, 2.5% calcium carbonate, 0.5% antioxidant 1010, 0.5 % zinc stearate and 2% masterbatch 1398, respectively diluted with low-density polyethylene, the amount of low-density polyethylene corresponding to 11.2%, 1%, 3.75%, 0.8%, 0.75%, 3%, through the twin-screw Extrusion granulation by extruder, extrusion temperature of twin-screw extruder 120°C; (2) Weigh 66.8% low-density polyethylene and mix evenly with the granules prepared in step (1); (3) Mix the mixed materials , extruded into a sheet by a single-screw extruder and wound up. The process conditions of the single-screw extruder are: the temperature of the first zone is 150°C, the temperature of the second zone is 145°C, the temperature of the third zone is 120°C, and the temperature of the fourth zone is 105°C. The temperature in the fifth zone i...

Embodiment 3

[0030] A method for preparing a cross-linked polyethylene conductive foaming material, comprising the following steps: (1) Weighing 10% azodicarbonamide, 0.3% conductive carbon black, 2.8% calcium carbonate, 1% antioxidant 1010, 0.5 % zinc stearate and 2.4% masterbatch 1398, respectively diluted with low-density polyethylene, the amount of low-density polyethylene is 15%, 1.5%, 4.2%, 1.6%, 0.8%, 3.6%, through the twin-screw Extrusion granulation by extruder, twin-screw extruder extrusion temperature 120°C; (2) Weigh 56.3% low-density polyethylene and mix evenly with the granules prepared in step (1); (3) Mix the mixed materials , extruded into sheets by a single-screw extruder and wound up. The process conditions of the single-screw extruder are: the temperature of the first zone is 155°C, the temperature of the second zone is 145°C, the temperature of the third zone is 125°C, and the temperature of the fourth zone is 110°C. The temperature in the fifth zone is 105°C, the temp...

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Abstract

The invention discloses a preparation method of a crosslinked polyethylene electric-conductive foam material. The preparation method includes the steps of: 1) respectively diluting azodicarbonamide, conductive carbon black, a toughener, an antioxidant, a lubricant and a colorant with low-density polyethylene, and performing extruding granulation through a twin-screw extruder; 2) uniformly mixing low-density polyethylene with the diluted raw materials in a stirrer; 3) performing extrusion through a single screw extruder to obtain a sheet material and reeling the sheet material; 4) performing high-energy electron irradiation crosslinking treatment; and 5) foaming the material through a foaming process to obtain the foam sheet material. The preparation method can effectively improve dispersibility of the electric-conductive carbon black and reduces usage amount thereof. The foam material has fine and uniform pores, stable electrical resistivity, good electric-conductivity, high mechanicalstrength and good processability.

Description

technical field [0001] The invention relates to the technical field of conductive foaming materials, in particular to a preparation method of cross-linked polyethylene conductive foaming materials. Background technique [0002] In recent years, conductive foam materials with electromagnetic wave interference shielding function have been widely used in many fields, mainly in electronics, communications, automobiles, military industry, aerospace and other fields, as well as those that require anti-static, shielding, impact resistance, flame retardancy, and heat resistance. Environment, such as TV, monitor, mobile phone, computer, medical instrument, etc. [0003] At present, the conductive foam materials on the domestic market are mainly anti-static pearl cotton and molded block polyethylene or EVA conductive foam. Anti-static pearl cotton is a non-crosslinked polyethylene material, which adopts physical foaming, has large cells, poor resilience, single magnification, large t...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08K3/04C08K3/26C08K5/098C08J9/10C08J7/12B29C47/92B29C48/92
Inventor 杨庆峰
Owner ZHEJIANG RUNYANG NEW MATERIAL TECH
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