The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1988
Filed:
Mar. 05, 1987
Paul R Ginnings, Wadsworth, OH (US);
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
This invention relates to a process for preparing a thermoplastic resin composition through a solid state polymerization process. The thermoplastic resin composition made in accordance with this invention is particularly suitable for use in thermoforming thin walled articles. The process of this invention specifically comprises (1) melt blending a polyethylene terephthalate prepolymer with at least one liquid crystalline polymer to produce a polyethylene terephthalate/liquid crystalline polymer blend; and (2) solid state polymerizing said polyethylene terephthalate/liquid crystalline polymer blend at a temperature within the range of about 195.degree. C. to about 255.degree. C. for a period of at least about 1 hour to produce a thermoplastic resin composition. The subject invention also deals with thermoforming such thermoplastic resin compositions into articles, such as food trays, having a crystallinity within the range of about 10% to about 40%.