Extrudable polyethylene terephthalate blend

Details Extrudable polyethylene terephthalate blend Extrudable polyethylene terephthalate blend

2007-10-19

2011-12-20

Seidleck, James J (Department: 1765)

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of liquid process material

C264S037100, C264S037250, C528S271000, C528S272000, C528S308300, C528S50200C, C528S503000, C428S480000, C525S055000, C525S191000, C525S197000, C525S221000, C525S510000, C422S131000, C422S245100, C521S040000, C521S048000

Reexamination Certificate

active

08080191

ABSTRACT:
A polymer blend has a base and blend components. The base and blend components could be a branched slow crystallizing PET and a faster crystallizing PET, respectively. The ratio of base and blend components result in a block copolymer, the melt processing time and branching or chain extender levels can be can be tailored to impart the polymer blend with sufficient melt strength and crystallization rates, such that it is slow enough during the blow molding process to produce a clear article and yet fast enough during the subsequent PET recycling process making it suitable for extrusion processes as well as for recycling. The combination of materials can be used to form monolayer or multilayer articles.

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