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Self-adhesive conductive silicone rubber electromagnetic shielding material

An electromagnetic shielding material, conductive silicon technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems affecting the shielding effect of products, poor assembly of electromagnetic sealing rings, etc., to eliminate poor electromagnetic sealing, The electromagnetic shielding effect is good and the labor cost is reduced

Inactive Publication Date: 2015-12-09
SHENZHEN BORNSUN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to problems such as manual operation errors and assembly techniques, the electromagnetic sealing ring is prone to poor assembly, which affects the shielding effect of the product
Therefore, it is necessary to eliminate electromagnetic interference as much as possible and reduce manual operation errors to ensure the feasibility of the product, but the general electromagnetic shielding conductive rubber material cannot meet the requirements for product feasibility

Method used

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  • Self-adhesive conductive silicone rubber electromagnetic shielding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Get the conductive carbon black powder that weight is 7kg, the nickel-coated graphite powder of 12kg, the trimethyl borate of 0.4kg, the methyl vinyl silicone rubber of 0.4kg silane coupling agent A-151, 13kg mixes 30 minutes, after double Add 0.5 kg of bis-2-4 vulcanizing agent on the roller mill and knead for 20 minutes to form the self-adhesive conductive silicone rubber electromagnetic shielding material of the present invention, and then press the electromagnetic shielding material on a flat vulcanizer to form a sealing strip with a diameter of 100 mm. Install the sealing strip between the upper and lower metal cover plates, cover the cover plate, pre-press with a force of 30kgf, and then put it in an oven at 160°C for 15 minutes to vulcanize, so that the two layers of metal cover plates are firmly bonded.

[0017] After testing, the resistivity of the self-adhesive conductive silicone rubber electromagnetic shielding material is 0.5Ω*cm, and the bonding force of th...

Embodiment 2

[0019] Get the silver powder that weight is 10kg, the nickel-coated graphite powder of 10kg, the tricyclic derivative of silicon nitrogen of 1kg, the methylvinyl silicone rubber of 0.5kg silane coupling agent A-171, 10kg add on the two-roll mill 0.5kg of hydrogen-containing silicone oil with a hydrogen content of 0.36%, and 0.05kg of a Pt catalyst with a double-headed Pt content of 3000ppm were opened for 20 minutes, and the composite material was pressed into a sealing strip with a diameter of 100mm on a flat vulcanizer. Install the sealing strip in the middle of the upper and lower metal cover plates, cover the cover plate, pre-press with a force of 30kgf, and then put it in an oven at 120°C for 15 minutes for vulcanization.

[0020] After testing, the resistivity of the conductive rubber mixture is 0.05Ω*cm, and the bonding strength of the upper and lower metal cover plates is greater than 4MPa. The adhesive force and resistivity of the sample remained unchanged after 1000 ...

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Abstract

The invention relates to a self-adhesive conductive silicone rubber electromagnetic shielding material. The self-adhesive conductive silicone rubber electromagnetic shielding material is characterized in that the electromagnetic shielding material is prepared from the following components by weight percent: 10 to 40% of silicone rubber, 1 to 20% of tackifier, 1 to 10% of coupling agent, 1 to 10% of curing agent and 50 to 85% of functional filler, wherein the functional filler includes conductive particles of conductive carbon black, nickel coated graphite, nickel coated glass beads, silver coated aluminum powder and silver coated glass beads, the average particle diameter is 0.01 to 500 micrometers, the impurity content is lower than 0.1%, and the moisture content is lower than 0.5%. The self-adhesive conductive silicone rubber electromagnetic shielding material has the functions of conduction and electromagnetic shielding and has a self-adhesive characteristic, poor electromagnetic sealing generated by manual assembly can be eliminated, the electromagnetic shielding effect of a product is good, and automatic assembly can be realized.

Description

【Technical field】 [0001] The invention relates to an electromagnetic shielding material, in particular to an electromagnetic shielding material with self-adhesiveness, which can reduce problems such as poor electromagnetic sealing and poor shielding effect caused by manual assembly, and can realize automatic production of self-adhesive conductive silicone rubber electromagnetic shielding material. 【Background technique】 [0002] At present, various types of electronic devices have been widely used in various aspects of social life. In order to ensure the stability and feasibility of the use of electronic products, many electronic devices, such as set-top boxes, communication base stations, mobile phones, military electronic products, etc., require electromagnetic shielding treatment. If this type of electronic equipment is affected by electromagnetic waves of the same frequency during use, it is easy to produce bad signals, resulting in a decrease in the stability of use and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/08C08K13/06C08K3/04C08K9/10C08K5/55C08K3/08C09J183/07C09J183/04C09J183/08C09J11/04
Inventor 刘治林刘稳
Owner SHENZHEN BORNSUN INDAL
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