C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5603, 18/794
C08L 67/02 (2006.01) B65D 65/38 (2006.01)
Patent
CA 1061926
ABSTRACT OF THE DISCLOSURE A sheet formed form a uniform blend of from about 80 to 97% by weight of polyethylene terephthalate having an intrinsic viscosity of above about 0.9 and a melt viscosity at 525°F. of above about 10,000 poises and correspondingly from about 20 to 3% by weight of a polycarbonate resin having an intrinsic viscosity of about 0.4 to 0.6 and a melt viscosity at 500°F. of less than 50,000 poises; said sheet having a haze value as determined by ASTM D-1003 of less than about 2% and being essentially amorphous and non-oriented. Also dis- closed is a process for forming a sheet which comprises uniformly blending the composition, extruding the composition into a sheet at a temperature between about 490 to 530°F. and rapidly cooling the sheet by contact with at least one cooling surface maintained at a surface temperature in the range of about 50 to 160°F. for a period of time not exceeding about 15 seconds. Containers may be formed form such sheets by a thermoforming step at temperatures in the range of about 210 to 280°F.
263814
Amin Surendra A.
Bollen P. Stuart
Sacks William
Allied Chemical Corporation
Na
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