Method for preparing aramid fiber fibre composite sheet material

Abstract

The present invention discloses composite aramid fiber sheet making process, and is especially process of making sheet with aramid fiber / polyester paper or aramid fiber / polyphenyl thioether paper as material. Aramid fiber / polyester paper or aramid fiber / polyphenyl thioether paper is produced into different types of sheet through superposing, heating in hot roller and pressurizing. During the production, PET film or polyphenyl thioether film to act as adhesive is added between two sheets of paper, and this simplifies the production process, raises the product performance and lowers the production cost.

Description

technical field

[0001] The invention belongs to the field of synthetic fiber paper, in particular to a method for manufacturing an aramid fiber composite sheet. Background technique

[0002] Aramid paper has high tensile strength, flame retardancy, low expansion coefficient, corrosion resistance and excellent insulation properties. However, since the melting point is close to the decomposition temperature, it cannot be processed by melt extrusion or heating molding. Therefore, the manufacture of sheets requires the addition of other adhesives or thermoplastic materials for compounding. Since the advent of polym-phenylene isophthalamide paper (Nomex paper), a large number of related patents have been published (US patents 3,756,908, 5,667,900). The fiber and pulp are structural fibers; the precipitated fiber made of poly-m-phenylene isophthalamide resin is used as a binder for production. Because the short fibers, pulp, and precipitated fibers are hydrophobic, it is diffic...

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