High-strength thermal conductive silica gel sheet, preparation method and application

Abstract

The invention discloses a high-strength thermal conductive silica gel sheet, which comprises polysiloxane, a silane coupling agent, vinyl silicone oil, boron nitride or copper powder carbon fiber forpreparation. The invention also discloses a preparation method of the high-strength thermal conductive silica gel sheet. The preparation method comprises the steps of mixing 5-12 parts by mass of polysiloxane, 8-21 parts of vinyl silicone oil and 3-7 parts of silane coupling agent, and conducting reaction in a nitrogen or hydrogen atmosphere; and putting an obtained mixture in a vacuum box to conduct vacuum defoaming, adding boron nitride or copper powder carbon fiber, and then conducting pressing to a predetermined thickness by a coating apparatus, and conducting vulcanization molding to obtain a product. The invention also discloses the application of the above high-strength thermal conductive silica gel sheet. The invention has the advantages that the preparation conditions are simple and can easily meets preparation requirements, the raw materials are relatively common, there is no waste of raw materials and cost is saved in the preparation process.

Description

technical field [0001] The invention relates to the field of silica gel sheets, more specifically, to a high-strength heat-conducting silica gel sheet, a preparation method and an application. Background technique [0002] Thermally conductive silicone sheet is a kind of thermally conductive medium material synthesized by a special process with silica gel as the base material, adding various auxiliary materials such as metal oxides. In the industry, it is also called thermally conductive silicone pad, thermally conductive silicone film, and soft thermally conductive pad. , heat-conducting silicone gaskets, etc., are specially designed for the use of gaps to transfer heat. They can fill gaps and complete heat transfer between heat-generating parts and heat-dissipating parts. At the same time, they also play the role of insulation, shock absorption, and sealing. The design requirements for equipment miniaturization and ultra-thinness are extremely manufacturable and usable, an...

AI Technical Summary

Problems solved by technology

[0003] At present, silica gel sheets are widely used in electronic and mechanical equipment, including mechanical crushing devices. Although the existing crushing machines have various structures, most of them use a pair of saw gears or toothed rollers to cut the target. It is difficult to crush effectively if the crushing target is high, and the existing crushing machine does not crush directly by size classification during operation, resulting in small-volume objects mixed in large-volume objects that cannot be crushed sufficiently, And after the crushing is completed, the discharge is easy to block, and manual operation is extremely inconvenient; the manufacturing method of a kind of silica gel sheet disclosed in the application number 200810095421. materials, but this technology is relatively vague in the description of the preparation conditions, and the description of the reaction temperature and reaction time is mostly omitted or not specific enough, and there are certain technical defects in use; the application number is 201420506406.2 A kind of effective prevention of dust escape The rolling machine, through the concave groove structure, basically solves the problem that the powder material will escape from the top cover of the rolling machine during the mixing of powder materials, but this technology does not solve the problem of powder discharge after crushing, which is easy to cause Stickiness or blockage affects the normal use of the device

Images