Stock material or miscellaneous articles – Composite – Of epoxy ether
Patent
1974-01-25
1976-02-10
Bashore, S. Leon
Stock material or miscellaneous articles
Composite
Of epoxy ether
156 628, 156307, 156330, 162156, 162168R, 428417, 428428, B32B 1704, D21H 518
Patent
active
039378659
ABSTRACT:
Non-woven glass-fiber webs for reinforcing plastics material carrying printed circuits are produced by the wet process from E-glass fibers bonded with polyvinyl alcohol. The polyvinyl alcohol used is a powder or suspension, has a degree of hydrolization of 98 - 100%, and a viscosity, as a 4% solution in water of 20.degree.C, of 20-100 cP. Preferably the polyvinyl alcohol has a degree of swelling at 20.degree.C of between 3 and 8, and in the dry form a particle size of between 50 and 180 .mu.. A plurality of these glass fiber webs are impregnated with a solution of an epoxy resin, arranged as a laminate, then compressed at elevated pressure and temperature to form the final laminate.
REFERENCES:
patent: 3200104 (1965-08-01), Imai et al.
patent: 3544538 (1970-12-01), Masuda et al.
patent: 3556754 (1971-01-01), Marsden et al.
patent: 3582513 (1971-06-01), Bouchard
patent: 3622445 (1971-11-01), Heidweiller
patent: 3630831 (1971-12-01), Jongetjes
Benzinger et al., "Properties of Glass Paper Laminates Made with Various Thermosetting Resins", Tappi, Vol. 49, No. 10, 10-1966, pp. 460-464.
Cakin, J. B., "Modern Pulp & Paper Making", 3rd Ed., Reinhold Pub., NY, NY, 1957, pp. 312-313.
Bashore S. Leon
Koninklijke Papierfabrieken Van Gelder Zonen N.V.
Smith William F.
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