Mica paper containing cellulose

Details Mica paper containing cellulose Mica paper containing cellulose

1977-12-15

1979-12-25

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Electrical or magnetic product characteristic

162181C, D21H 366

Patent

active

041804341

ABSTRACT:
A novel electrically insulating mica paper containing cellulose, but no binding agent and having a tensile strength and a porosity higher than those of pure mica paper is disclosed. The tensile strength is sufficiently high for the mica paper to be processed without backing. The novel mica paper contains mica pulp consisting of platelets of natural mica and 10 to 50% by weight, preferably 20 to 30% by weight, of cellulose fibres which preferably have a freeness of 20 to 60 on the Schopper-Riegler scale. It can be produced by adding cellulose fibres to mica pulp produced without using chemicals other than water and processing the mixed pulp by conventional methods to a paper, without using a binding agent, temperatures higher than 100.degree. C. or pressure.

REFERENCES:
patent: 852918 (1906-05-01), White
patent: 1868566 (1932-07-01), Crossman
patent: 2614055 (1952-10-01), Senarclens
patent: 3001571 (1961-09-01), Hatch

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