High-temperature-resisting wet-process felt and preparation method thereof

Abstract

The invention discloses a high-temperature-resisting wet-process felt and a preparation method thereof. The porosity of the high-temperature-resisting wet-process felt is more than 93% and the thickness of the high-temperature-resisting wet-process felt is 6mm-22mm; a nano silicon dioxide coating is arranged on the outer surface of the high-temperature-resisting wet-process felt; the diameter of fiber monofilaments of the high-temperature-resisting wet-process felt is 0.1 micron-2 microns, and closed vacuum balls with the diameter being less than 20nm are uniformly arranged on the outer surfaces of the fiber monofilaments. By the aid of the high-temperature-resisting wet-process felt, the porosity of a fiber cotton felt is greatly improved and the heat conductivity coefficient of the fiber cotton felt is reduced; any binding agent is not added into the product so that the product has the advantages of no toxin, high temperature resistance, low moisture absorption rate, soft texture and small volume density, and can be repeatedly used at high and low temperatures, and the heat insulation performance is not obviously reduced when the product is used at the high temperature; the highest utilization temperature is up to 1000 DEG C; the high-temperature-resisting wet-process felt can be widely applied to fire prevention and heat insulation of high-temperature equipment and is particularly suitable for heat preservation and heat insulation of equipment which needs to be usually converted between high temperature and low temperature.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and specifically relates to a high-temperature-resistant wet-process felt and a preparation method thereof, which can be widely used for fire prevention and heat insulation of various equipment below 1000°C, especially for equipment that needs to be frequently switched between high and low temperature insulation. Background technique [0002] With the advancement of science and technology and the development of aerospace technology, people's requirements for high-temperature insulation materials are also increasing. Traditional high-temperature insulation materials such as asbestos and rock wool can no longer meet the requirements due to their high thermal conductivity. High-silica glass fiber is a high-temperature-resistant inorganic fiber with a high softening point and a relatively low thermal conductivity. However, for some applications that require lower thermal conductivity, traditional h...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of science and technology and the development of aerospace technology, people's requirements for high-temperature insulation materials are also increasing. Traditional high-temperature insulation materials such as asbestos and rock wool can no longer meet the requirements due to their high thermal conductivity.

High-silica glass fiber is a high-temperature-resistant inorganic fiber with a high softening point and a relatively low thermal conductivity. However, for some applications that require lower thermal conductivity, traditional high-silica cotton felts are already difficult. Meet the requirements

[0003] At present, there are many patents disclosing the use of inorganic fiber-reinforced aerogels for thermal insulation materials, which have high heat resistance and low thermal conductivity. However, due to the high rigidity and poor plasticity of this composite material, it is difficult to Thermal insulation for special-shaped bodies or spaces; at the same time, the preparation process of airgel is very complicated, and the equipment is expensive, so it is not conducive to the wide application and promotion of this technology