Novel low-temperature insulation and thermal insulation pre-impregnated fiber cloth and preparation method thereof

Abstract

The invention relates to a novel low-temperature insulation and thermal insulation pre-impregnated fiber cloth. The novel low-temperature insulation and thermal insulation pre-impregnated fiber cloth is obtained by impregnating 45 wt%-65 wt% of glass fiber cloth in 35 wt%-55 wt% of epoxy resin sizing agent; the epoxy resin sizing agent is prepared from 85 wt%-95 wt% of epoxy resin mixture, 5 wt%-15 wt% of modified latent curing agent mixture, 70 wt%-90 wt% of epoxy resin, 5 wt%-25 wt% of modified epoxy resin flexibilizer, 0 wt%-10 wt% of surfactant, 0 wt%-5 wt% of flame retardant, 4.5 wt%-12 wt% of latent curing agent and 0.5 wt%-3 wt% of accelerator. The invention further discloses a preparation method of the novel low-temperature insulation and thermal insulation pre-impregnated fiber cloth. The obtained material is not prone to cracking, and the requirement of low-temperature engineering can be met.

Description

technical field [0001] The invention relates to a pre-impregnated fiber cloth, in particular to a novel low-temperature insulating and heat-insulating pre-impregnated fiber cloth and a preparation method thereof. Background technique [0002] Pre-impregnated fiber material is mainly composed of resin matrix and fiber fabric, and has become a kind of intermediate material widely used in the design and manufacturing process of fiber-reinforced composite materials. [0003] Chinese patent CN 103497349B discloses a precured glass fiber cloth impregnating material and its preparation method, which consists of a glass fiber cloth coated with an adhesive through a gluing machine and baked through a gluing machine oven; the adhesive consists of 1000 parts by mass It is composed of benzoxazine-maleamide resin solution, 15-30 parts by mass of linear isophthalic unsaturated polyester, 0.2-2 parts by mass of accelerator, and 0.1-0.3 parts by mass of initiator. The preparation method in...

AI Technical Summary

Problems solved by technology

[0005] However, in low temperature environment, conventional resin-based prepregs have some problems, especially in ultra-low temperature environment, such as liquid helium temperature zone, liquid hydrogen temperature zone, etc., the material is brittle and easy to crack, so that it is difficult to meet the requirements. Requirements for cryogenic engineering applications

At present, there is no localized low-temperature pre-impregnated fiber cloth product on the market

Images