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:
Apr. 25, 1995
Filed:
Feb. 10, 1994
Imperial Chemical Industries PLC, London, GB;
Abstract
Refillable polyethylene terephthalate (PET) bottles are made by injection stretch blow moulding and comprise a threaded neck of transparent amorphous substantially non-oriented PET; a substantially cylindrical body of transparent biaxially oriented amorphous PET from 0.4 to 0.9 mm thick and an area expansion ratio of at least 7; and a base of transparent amorphous substantially non-oriented or partly oriented PET in which the PET is a polyethylene terephthalate polymer randomly modified by replacing from 1 to 6 mole % of the terephthalate units with units of a chain orientation disrupting aromatic dicarboxylic acid, such as iso-phthalic acid, having an Intrinsic Viscosity of at least 0.75. The polymer particularly includes fine metal particles especially of antimony to reduce the reheat, and optionally includes a level of diethylene glycol residues greater than normally present in PET to improve the blowing performance of the polymer.