Hot press molding method of meta-aramid thick paper

Abstract

The invention discloses a hot press molding method of meta-aramid thick paper. Specifically, multiple layers of meta-aramid raw paper with a quantitative amount of 20-150g / m<2> are directly subjectedto one-time hot-pressing composite molding according to multi-station unwinding, glass transition and softening melting are realized at high temperature relying on fibrid in the meta-aramid raw paper,chopped fiber in the meta-aramid raw paper is wrapped to realize interlayer tight combination, thus forming the meta-aramid thick paper compounded by the multiple layers of meta-aramid raw paper. Themethod provided by the invention does not utilize glue compounding nor introduce impurities, adopts pure aramid component, can realize one-time hot-pressing composite molding, also can effectively integrate the characteristic of good uniformity of low-weight aramid paper, and prevents the poor molding evenness of aramid paper from affecting the performance of molded paper. The method provided bythe invention can realize continuous batch production of aramid paper, is simple and efficient, and low in loss rate, and the prepared aramid paper has high uniformity and compact structure.

Description

technical field [0001] The present invention relates to a method for making meta-aramid thick paper, in particular to a method for hot-press forming meta-aramid thick paper. The remaining impurities are introduced into pure aramid fiber components, and one-time hot-press composite molding can be realized; it belongs to the technical field of making meta-aramid fiber thick paper. Background technique [0002] Meta-aramid paper is a kind of aramid paper. Meta-aramid paper has become a kind of high-quality functional fiber due to its excellent high temperature resistance and insulation; the most prominent feature of meta-aramid paper is high temperature resistance , can be used for a long time without aging at a high temperature of 220°C, its electrical and mechanical properties can be maintained for 10 years, and its dimensional stability is excellent, and its thermal shrinkage rate is only 1% at about 250°C; It will not shrink, embrittle, soften or melt when exposed to a hig...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to aim at the production process of the existing meta-aramid thick paper, generally adopt the mode of meta-aramid base paper to go through multiple times of thermocompression molding, the maximum can only produce the product of 0.76mm thickness; The operation steps are complicated, and The use of multiple hot pressing molding increases the operation process, increases the cost of labor and energy consumption, and causes an increase in the loss rate. At the same time, multiple hot pressing is easy to cause secondary damage to the formed paper, which is not conducive to comprehensive performance and other shortcomings. , a new method for making meta-aramid thick paper is proposed. The maximum thickness of the meta-aramid thick paper produced by this new method for making meta-aramid thick paper can reach 0.90mm, and can realize Continuous production, simple and efficient, low loss rate