HEAT-RESISTANT FIBER PAPER

摘要

A heat-resistant fiber paper composed mainly of a short fiber of a heat-resistant organic, high-molecular-weight polymer and a fibrid of a heat-resistant organic, high-molecular-weight polymer, wherein the content of the short fiber in the total weight of the paper is 40 to 97 % by weight, the content of the fibrid in the total weight of the paper is 3 to 60 % by weight, and the fibrid is partially softened and/or melted to allow the fibrid to act as a binder. This paper possesses excellent heat resistance, thermal dimensional stability, interlaminar peel strength, electrical insulating properties under high humidity conditions and other properties. In addition, it has good resin impregnation despite high bulk density and is particularly suitable as a substrate for an electrical insulating material and a substrate for a laminate for an electric circuit.