Preparation method of flexible nano thermal insulation heat preservation felt and flexible nano thermal insulation heat preservation felt

Abstract

The invention discloses a preparation method of a flexible nano thermal insulation heat preservation felt. The method comprises the following steps: preparing a three-side sealed one-side opened package bag by using a sewing manner, wherein the material of the package bag is quartz fiber cloth, high silica glass cloth, glass fiber cloth or ceramic fiber cloth; performing uniform stirring on nano silica, a sunscreen agent and reinforcing fibers by using a dry mixing manner to obtain a mixed material; filling the mixed material into the package bag; performing opening-sealing on the opening edgeof the packaging bag by using a sewing manner; flatting the packaging bag and then performing pressing to form a plate-shaped heat preservation felt by using a pressure of 30-120 T / m<2>; and performing cross-sewing on the heat preservation felt in the warp and weft directions, wherein the material of a sewing thread is the same as that of the package bag. The prepared flexible nano thermal insulation heat preservation felt has small thickness, and can be used at a temperature of about 900 DEG C for a long time, the thermal conductivity can reach about 0.050 W / (m.K), and the felt can be arbitrarily cut and bent according to actual needs.

Description

technical field [0001] The invention relates to the technical field of heat insulation board preparation, in particular to a preparation method of a flexible nano heat insulation felt and a flexible nano heat insulation felt. Background technique [0002] At present, high temperature resistant insulation materials include ceramic fiber, rock wool, etc. These materials are low in cost, but have high thermal conductivity. There is also a nano-insulation material—airgel, which can achieve overall hydrophobicity and arbitrary cutting and bending, but the maximum temperature resistance does not exceed 600°C. The higher the temperature, the greater the growth rate of the thermal conductivity, and the high preparation cost. [0003] As the country's energy-saving and environmental protection requirements are getting higher and higher, it is difficult to prepare ultra-thin thermal insulation materials that can be cut and bent arbitrarily, and are resistant to temperature and heat in...

AI Technical Summary

Problems solved by technology

[0002] At present, high temperature resistant insulation materials include ceramic fiber, rock wool, etc. These materials are low in cost, but have high thermal conductivity

There is also a nano-insulation material—aerogel, which can achieve overall hydrophobicity and arbitrary cutting and bending, but the maximum temperature resistance does not exceed 600°C. The higher the temperature, the greater the growth rate of thermal conductivity, and the high preparation cost

[0003] As the country's energy-saving and environmental protection requirements are getting higher and higher, it is difficult to prepare ultra-thin thermal insulation materials that can be cut and bent arbitrarily, and are resistant to temperature and heat insulation, using common materials currently on the market.

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