Preparation method of ultrathin adiabatic and insulated flexible non-woven fabrics resistant to 1000 degrees

Abstract

The invention discloses a preparation method of ultrathin adiabatic and insulated flexible non-woven fabrics resistant to 1000 degrees. The method comprises the following steps of S1) melting and purifying nonmetallic crystal mineral, and adding rare metal compounds to prepare high-temperature resistant fiber; S2) opening to card the high-temperature resistance fiber into thin webs with uniform thickness; S3) applying solvent resistance stock glue solution on the thin webs for drying and dehydration to prepare solvent resistance high-temperature resistant porous cotton, and preparing high-temperature resistance fiber non-woven rolls; S4) uniformly dispersing adiabatic powder in a 100% alcohols solvent to form a mixed solution, and soaking the high-temperature resistance fiber non-woven rolls in the mixed solution in a vacuum mixing kettle for reverse reduction reaction; and S5) recovering the residual alcohols solvent after reaction by using low-temperature vacuum centrifugation to prepare the finished non-woven fabrics. The non-woven fabrics prepared by the invention are ultrathin, ultra-light, resistant to 1000 degrees, adiabatic and resistant to alcohols solvents with 100% concentration, have excellent dry and wet strength, and are capable of maintaining complete structure, electrical insulation and explosion protection.

Description

technical field [0001] The invention relates to the technical field of functional non-woven fabrics, in particular to a preparation method of an ultra-thin flexible non-woven fabric resistant to heat insulation at 1000°C. Background technique [0002] Thermal insulation material refers to the material that can block the transfer of heat flow, also known as thermal insulation material. Traditional thermal insulation materials, such as glass fiber, polyurethane foam, rock wool, silicate, etc.; new thermal insulation materials, such as airgel felt, vacuum panels, etc., which are used for building envelope or thermal equipment to resist heat flow transfer A material or a composite of materials includes both heat insulating materials and cold insulating materials. On the one hand, thermal insulation materials satisfy the heat storage environment of building space or thermal equipment, and on the other hand, they also play a key role in the thermal management and safety protectio...

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Problems solved by technology

[0003] Insulation materials, such as alkali-free glass fiber products, have a softening point of 600°C and cannot be used for a long time at a high temperature of 1000°C; carbon fiber products can withstand temperatures up to 1000°C, but cannot be used in environments with power discharge; aramid products, para-aramid Lun 1414 has a temperature resistance of 500°C and cannot be used at a high temperature of 1000°C for a long time, and the price is relatively expensive; rock wool products have a thermal conductivity of about 0.03W / (m k) at room temperature and have good thermal insulation, but they are too thick for thermal insulation protection It takes too much space to be used in the field of small mobile devices, and its weather resistance is not good. It needs partial replacement after two years of use in daily environment

[0004] The heat insulation function can also be realized by the heat insulation coating. The best heat insulation coating can withstand high temperature of 1000°C, but once the heat insulation coating is burned through, the underlying support will be burned quickly, and it can only be sprayed on the support when used. On the body, the coating can be firmly combined with the support after 6 to 8 hours of natural curing, and the process time is too long to continue production

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