Paper making and fiber liberation – Processes and products – Plural fiber containing
Patent
1993-12-14
1995-07-11
Chin, Peter
Paper making and fiber liberation
Processes and products
Plural fiber containing
162123, 162146, 162152, 162156, 1621572, 1621573, 1621646, 1621682, 162206, D21H 1326
Patent
active
054317827
ABSTRACT:
The present invention relates to a reactivable paper and to a process for obtaining it.
The paper consists of fibres with a heat resistance .gtoreq.180.degree. C., bonded together by means of a fibrous binder composed of polyamide or aromatic polyester pulp and of a chemical binder consisting of a polyether-imide of an aromatic polyester or of a resin of polyimide type, with a particle size smaller than 100 .mu.m, a softening point of between 50.degree. and 200.degree. C., and a degree of crosslinking of between 0.025 and 0.25. The weight proportion of fibres in the finished paper is generally preferably between 45 and 85%, that of the fibrous binder between 5 and 20%, that of the chemical binder between 10 and 50%.
The papers are obtained by a wet route and find wide applications as a function of the degree of conversion of the resin, for example as a dielectric.
REFERENCES:
patent: 4316002 (1982-02-01), Cassat et al.
patent: 4729921 (1988-03-01), Tokarsky
patent: 4799996 (1989-01-01), Cassat
patent: 5002637 (1991-03-01), Toyoshima et al.
patent: 5053474 (1991-10-01), Camberlin et al.
patent: 5176794 (1993-01-01), Conner et al.
Chin Peter
Rhone Poulenc Fibres
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