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Current conducting silicon rubber with capability of electromagnetic shielding, and fabricating method

A technology of electromagnetic shielding and manufacturing method, applied in the field of conductive silicone rubber and its manufacturing, to achieve the effects of high shielding efficiency, meeting electromagnetic shielding requirements, excellent electromagnetic shielding performance and environmental resistance performance

Active Publication Date: 2007-10-10
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In these reports, there are conductive rubber with silver as filler, and there are also reports about silver powder, nickel powder, carbon black, and stainless steel fiber as filler, but they all use conductivity as the evaluation standard and cannot obtain good results in a wide electromagnetic wave frequency band. The shielding effect or anti-interference ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of conductive silicone rubber, its main component (weight %) is: Silicone rubber: 100, SiO 2 : 50, Ag: 55, Ni: 10, Fe 2 o 3 : 10, curing agent: 1.0, others: 4. The above components are mixed in sequence, and kneaded evenly on a two-roll rubber mill to obtain conductive silicone rubber. The required products are obtained through processes such as parking, re-smelting, tablet discharge, feeding, primary vulcanization, secondary vulcanization, and trimming. The electromagnetic shielding effectiveness test was carried out, and the test results are shown in Table 2.

[0036] Preface

Embodiment 2

[0038]A kind of conductive silicone rubber, its main component (weight %) is: Silicone rubber: 100, SiO 2 : 57, Ag: 45, Ni: 8, Fe 2 o 3 : 8, vulcanizing agent: 0.9 Others: 3. The above components are mixed in sequence, and kneaded evenly on a two-roll rubber mill to obtain conductive silicone rubber. The 100mm×100mm×2mm test piece was prepared by parking, re-smelting, sheeting, feeding, primary vulcanization, secondary vulcanization, trimming and other processes, and the salt spray performance and mold performance test were carried out. After the test, the mechanical performance test was carried out, and the test results As in Table 3.

[0039]

Embodiment 3

[0041] A conductive silicone rubber, the main components (weight %) are: organic silicon rubber: 100, Ag=98wt% silver powder 30, nickel powder 40, magnetic powder 30. Mix the above ingredients in a certain order, and knead evenly on a two-roll rubber mixer to obtain conductive silicone rubber. The required products are obtained through processes such as parking, re-smelting, tablet discharge, feeding, primary vulcanization, secondary vulcanization, and trimming. The test results show that the tensile strength is 2.0MPa, and the elongation at break is 140%, and the shielding effectiveness of 60dB can be satisfied within the electromagnetic wave frequency range of 10K-18GHz.

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Abstract

This invention relates to an electrically conductive silicon rubber with electromagnetic shielding performance. The electrically conductive silicon rubber is prepared by: filling organosilicon rubber matrix with electrically and magnetically conductive media. The electrically and magnetically conductive media comprise: Ag powder 30-70 wt. %, Ni powder 0-40 wt. %, and magnetic powder 0-40 wt. %. The electrically conductive silicon rubber has such advantages as high weathering resistance, good mechanical properties, and high electromagnetic shielding performance.

Description

technical field [0001] The invention relates to non-metallic functional materials, in particular to a conductive silicone rubber with electromagnetic shielding performance and a manufacturing method thereof. Background technique [0002] In today's information society, with the development of electronic technology and computer technology, the number of electrical and electronic equipment used in a system has greatly increased, bringing more electromagnetic interference sources and sensors, and increasing potential interference; on the other hand , The miniaturization of the equipment makes the source and the source very close, which puts forward higher requirements for the control of electromagnetic interference. The World Health Organization has listed electromagnetic radiation as the fourth largest pollution. The United States and Europe have long formulated laws and regulations on the prevention of electromagnetic radiation, and Japan in Asia also has relatively complete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/08H01B1/22H05K9/00C08K5/14C08K5/23
Inventor 马颖琦施杰刘宇盖张兆峰
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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