Films and sheets of polyester-polycarbonate blends

Details Films and sheets of polyester-polycarbonate blends Films and sheets of polyester-polycarbonate blends

C - Chemistry, Metallurgy

08

L

18/1000, 400/560

C08L 67/02 (2006.01)

Patent

CA 1055184

INVENTION: FILMS AND SHEETS OF POLYESTER-POLCARBONATE BLENDS INVENTORS: PHILLIP STUART BOLLEN, SURENDRA A. AMIN and WILLIAM SACKS ABSTRACT OF THE DISCLOSURE 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 tere- phthalate having an intrinsic viscosity of at least about 0.90, about 15 to 40 parts by weight of a polycarbonate and preferably also containing about 5 to 20 parts by weight of 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.

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