Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Mica particles
Patent
1974-09-27
1976-06-29
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Mica particles
264 63, 264125, 264332, C04b 3516
Patent
active
039668622
ABSTRACT:
A method of making reconstituted mica sheet in which dry ground mica is blended together with dry ground thermoplastic polyester to produce a dry powder mixture having no more than about 90% mica by weight of mixture, the dry powder mixture is formed into a layer, and the layer of dry powder is subjected to heat and pressure for softening the polyester and bonding the mica into sheet form. The mica used preferably is scrap mica and the polyester used preferably is scrap polyethylene terephthlate, ground to have particle size distributions as set forth in detail hereinafter.
REFERENCES:
patent: 2367047 (1945-01-01), Pellett
patent: 2542827 (1951-02-01), Minter
patent: 2760879 (1956-08-01), McDaniel et al.
patent: 3310411 (1967-03-01), Vedder et al.
patent: 3764456 (1973-10-01), Woodhams
Parrish John
Silbaugh Jan H.
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