Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1976-06-03
1978-08-15
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
260 40R, 260860, 264 92, 264176R, 264322, 264331, B29C 1704
Patent
active
041072510
ABSTRACT:
This invention provides a film or sheet capable of being thermoformed into a shaped article and being formed from a blend of about 60 to 85 parts by weight of a polyethylene terephthalate having an intrinsic viscosity of at least about 0.90, about 15 to 40 parts by weight of a polycarbonate and about 5 to 20 parts by weight of a non-acidic silica filler, such as novaculite, the polyethylene terephthalate portion of the film or sheet having a degree of crystallinity in the range of about 20 to 40%. The present invention also provides compositions for forming such films and sheets and shaped articles thermoformed from such films or sheets, such as cook-in-trays. This invention also provides a process of forming such films or sheets.
REFERENCES:
patent: 3218372 (1965-11-01), Okamura et al.
patent: 3429854 (1969-02-01), Siggel et al.
patent: 3479318 (1969-11-01), Jackson et al.
patent: 3629381 (1971-12-01), Walker
patent: 3745140 (1973-07-01), Segal
patent: 3833685 (1974-09-01), Wambach
patent: 3889039 (1975-06-01), Wainer
patent: 3975485 (1976-08-01), Bollen et al.
patent: 4020126 (1977-04-01), Gander et al.
Amin Surendra A.
Bollen Philip Stuart
Allied Chemical Corporation
Criss Roger H.
Naylor Henry E.
Thurlow Jeffery R.
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