Heat-preservation and heat-insulation carbon felt and preparation method thereof

Abstract

The invention provides a heat-preservation and heat-insulation carbon felt and a preparation method thereof, and relates to the technical field of thermal insulation material preparation. According to the heat-preservation and heat-insulation carbon felt and the preparation method thereof, the heat-preservation and heat-insulation carbon felt is composed of expandable A-stage phenolic resin with the carbon residue amount of 36-88%, a surfactant, a foaming agent, a curing agent, carbon fibers, self-adhesive pre-oxidized fibers, thermosetting resin fibers, carbon fiber precursor thermoplastic resin fibers and other materials. The heat-preservation and heat-insulation carbon felt is characterized by being prepared from the following materials in parts by mass of 30-90 parts of expandable A-stage phenolic resin with the carbon residue content of 36-88%, 2-6 parts of the surfactant, 4-10 parts of the foaming agent, 10-25 parts of the curing agent, 25-70 parts of carbon fibers, 0-40 parts of self-adhesive pre-oxidized fibers, 10-30 parts of thermosetting resin fibers and 10-35 parts of carbon fiber precursor thermoplastic resin fibers. According to the heat-preservation and heat-insulation carbon felt and the preparation method thereof provided by the invention, the preparation process is simpler and more environment-friendly, and the prepared carbon felt has better heat-preservation and heat-insulation performance, better quality and higher cost performance.

Description

technical field [0001] The invention relates to the technical field of preparation of thermal insulation materials, in particular to a thermal insulation carbon felt and a preparation method thereof. Background technique [0002] In recent years, my country's investment in the field of polysilicon smelting and purification has been increasing, and the size of the furnace of the smelting equipment invested has been increasing. Polysilicon smelting is a high-energy-consuming industry that consumes a lot of electric energy. The thermal insulation effect in the smelting furnace will It directly affects the amount of electric energy consumed by polycrystalline silicon smelting, so the thermal insulation blanket with excellent high-temperature insulation effect can effectively reduce the heat in the furnace from spreading to the furnace wall, reduce energy consumption, save energy, thereby saving smelting costs and improving profits. [0003] The preparation cost of soft carbon (gr...

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Problems solved by technology

[0011] Aiming at the deficiencies of the prior art, the present invention provides a heat-insulating carbon felt and its preparation method, which solves many problems in the use of soft carbon felt, and the ordinary carbon felt has poor heat-insulation performance, and can be used in high-temperature environments. It is easy to crack and delaminate during use, and the service life is also short