Low-density flexible high-thermal-conductivity wave-absorbing silica gel sheet, and preparation method and equipment thereof

Abstract

The invention discloses a low-density flexible high-thermal-conductivity wave-absorbing silica gel sheet. The sheet is characterized by being prepared from the following components in parts by weight:100 parts of vinyl silicone oil, 10 to 30 parts of organic silicon resin, 60 to 80 parts of raw rubber, 5 to 10 parts of a cross-linking agent, 1000 to 1500 parts of a low-density filler and 80 to 100 parts of a wave-absorbing filler, wherein the wave-absorbing filler comprises 75 to 95 parts of barium ferrite coated hollow glass beads, 5 to 25 parts of magnetic multilayer carbon nanotubes, 0.1 to 0.5 part of a catalyst and 0.1 to 0.2 part of an inhibitor, and the low-density filler is one or a mixture selected from the group consisting of aluminum oxide, magnesium oxide, boron nitride, aluminum nitride and beryllium oxide. The invention also discloses a preparation method and equipment of the silica gel sheet. According to the low-density flexible high-thermal-conductivity wave-absorbingsilica gel sheet and the preparation method and equipment provided by the invention, with synchronous improvement of material, process and equipment, the prepared silica gel sheet has low density, flexibility, high thermal conductivity and a wave-absorbing function, and the production process and the production equipment are simplified.

Description

technical field [0001] The invention relates to the technical field of high thermal conductivity and wave-absorbing silica gel sheets, in particular to a low-density flexible high-thermal-conduction wave-absorbing silica gel sheet, a preparation method and equipment. Background technique [0002] Thermally conductive silicone sheet has excellent thermal conductivity and electrical insulation performance, which can meet the thermal insulation requirements of most electronic products. Thermally conductive silicone sheet is specially made for the design of using gaps to transfer heat. It can fill gaps and effectively transfer heat from heating components. To the radiator, and has stable thermal conductivity, and at the same time, this product is viscous, and the application is simple and convenient. The silicone sheet uses the characteristics of the soft silicone thermal conductivity material, such as stable thermal conductivity, insulation performance, softness and elasticity, ...

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Problems solved by technology

[0011] Aiming at the deficiencies of the prior art, the present invention provides a preparation method and equipment for a low-density flexible high-thermal conductivity wave-absorbing silica gel sheet, which enables the material to have low-density, flexible, high heat-conduction and wave-absorbing functions, and at the same time optimizes the production process and equipment Simplified to solve the problems of the current high thermal conductivity and wave-absorbing silica gel sheet ratio and detection methods are backward, the quality and performance of the material cannot be precisely controlled, and the physical and chemical properties of the silica gel sheet are not accurately tested.

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