Wear-resisting electromagnetic shielding modified polyformaldehyde material

A polyoxymethylene material and electromagnetic shielding technology, applied in the field of polymer materials, can solve the problems of reduced wear resistance, high price, long delivery cycle, etc., and achieve the effects of outstanding antimagnetic, reduced corrosion, and excellent lubricating properties

Inactive Publication Date: 2019-07-23
SUZHOU WEIRUICHENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing imported materials include partial electromagnetic shielding POM, carbon fiber, metal fiber and other materials are used to meet the requirements, the wear resistance characteristics are reduced, the delivery cycle is long, and the price is expensive

Method used

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  • Wear-resisting electromagnetic shielding modified polyformaldehyde material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A wear-resistant electromagnetic shielding modified polyoxymethylene material, comprising the following components by weight fraction: 70 parts of polyoxymethylene, 10 parts of molybdenum disulfide, 5 parts of conductive carbon black, 0.5 parts of liquid dispersant, and 0.2 parts of metal passivator , heat stabilizer 0.2 part, antioxidant 0.2 part.

[0023] Among them, aerospace-grade molybdenum disulfide is used, with small particle size and good dispersion. Special molybdenum disulfide is used to improve the overall wear resistance of the system, and at the same time increase the excellent characteristics of magnetic shielding. Conductive carbon black is further added to increase the excellent characteristics of electrical shielding, specifically Degussa conductive carbon black.

[0024] Specifically, the polyoxymethylene is copolymerized high-flow polyoxymethylene, and the mechanical properties and processing performance of the material are improved by copolymerizing...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that a wear-resistant electromagnetic shielding modified polyoxymethylene material includes the following components by weight fraction: 80 parts of polyoxymethylene, 15 parts of molybdenum disulfide, 7 parts of conductive carbon black, liquid 3 parts of dispersant, 0.5 part of metal deactivator, 0.5 part of heat stabilizer, 0.3 part of antioxidant.

[0034] The invention also discloses a method for preparing the wear-resistant electromagnetic shielding modified polyoxymethylene material, comprising the following steps: weighing 80 parts of polyoxymethylene, 15 parts of molybdenum disulfide, 7 parts of conductive carbon black, and 3 parts of liquid dispersant , 0.5 part of metal deactivator, 0.5 part of heat stabilizer, and 0.3 part of antioxidant are mixed uniformly, then melt-extruded and granulated by a twin-screw extruder to obtain a modified polyoxymethylene material.

Embodiment 3

[0036] The difference between this embodiment and Embodiment 1 is that a wear-resistant electromagnetic shielding modified polyoxymethylene material includes the following components by weight fraction: 90 parts of polyoxymethylene, 20 parts of molybdenum disulfide, 10 parts of conductive carbon black, liquid 5 parts of dispersant, 0.8 part of metal deactivator, 0.8 part of heat stabilizer, 0.5 part of antioxidant.

[0037] The invention also discloses a method for preparing the wear-resistant electromagnetic shielding modified polyoxymethylene material, comprising the following steps: weighing 90 parts of polyoxymethylene, 20 parts of molybdenum disulfide, 10 parts of conductive carbon black, and 5 parts of liquid dispersant , 0.8 part of metal deactivator, 0.8 part of heat stabilizer, and 0.5 part of antioxidant are mixed uniformly, then melt-extruded and granulated by a twin-screw extruder to obtain a modified polyoxymethylene material.

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Abstract

The invention discloses a wear-resisting electromagnetic shielding modified polyformaldehyde material which is prepared from the following ingredients in parts by weight: 70 to 90 parts of polyformaldehyde, 10 to 20 parts of molybdenum disulfide, 5 to 10 parts of conductive carbon black, 0.5 to 5 parts of liquid dispersing agent, 0.2 to 0.8 part of metal passivator, 0.2 to 0.8 part of heat stabilizer and 0.2 to 0.5 part of antioxidant. The modified polyformaldehyde material disclosed by the invention is suitable for special environments related to weather resistance, long-acting lubrication, electromagnetic shielding and the like of communication base stations and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a wear-resistant electromagnetic shielding modified polyoxymethylene material used for communication equipment and communication base stations. Background technique [0002] Polyoxymethylene (POM) has good lubricity and wear resistance, but its disadvantages are that the lubricity decreases when it is softened at high temperature or long-term use, and its weather resistance is poor. [0003] Due to the special requirements of its work, communication equipment has the characteristics of good weather resistance, stable wear resistance, and less electromagnetic shielding interference. The development of 5G technology and the amplification of power require the internal structure to have better weather resistance and stability. At the same time, in order to reduce interference, the requirements for electromagnetic shielding are gradually increasing. [0004] The existing im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L83/04C08K13/02C08K3/30C08K3/04C08K5/3492C08K5/25
CPCC08K2003/3009C08K2201/001C08L59/04C08L83/04C08K13/02C08K3/30C08K3/04C08K5/34928C08K5/25
Inventor 唐强王克成李世平
Owner SUZHOU WEIRUICHENG NEW MATERIAL
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