Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1997-02-12
1998-12-01
Short, Patricia A.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428 357, 2642101, 525166, A47J 3700
Patent
active
058435450
ABSTRACT:
This invention relates to a thermoplastic resin composition which is particularly suitable for use in thermoforming thin-walled articles, such as dual-ovenable trays. Articles which are made utilizing this thermoplastic resin composition have improved low-temperature impact strength. This thermoplastic resin composition is comprised of (a) from about 86 weight percent to about 98 weight percent polyethylene terephthalate having an intrinsic viscosity of at least about 0.7 dl/g; (b) from about 1 weight percent to about 7 weight percent of a polyethylene ionomer; and (c) from about 1 weight percent to about 7 weight percent of a polyolefin with repeat units derived from olefin monomers containing 2 to 6 carbon atoms, wherein the thermoplastic resin composition contains an effective amount of a heat stabilizer. The subject invention also includes thermoforming such thermoplastic resin compositions into thin-walled articles having a crystallinity of from about 10 percent to about 40 percent.
REFERENCES:
patent: 3639527 (1972-02-01), Brinkmann
patent: 3960807 (1976-06-01), McTaggart
patent: 5023137 (1991-06-01), Smith
Muller Kim
Shell Oil Company
Short Patricia A.
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