Process for the preparation of transparent shaped articles

Details Process for the preparation of transparent shaped articles Process for the preparation of transparent shaped articles

2011-06-07

2011-06-07

Woodward, Ana L (Department: 1765)

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of process trim or excess blanked material

C264S037100, C264S037290, C264S037310, C264S037320, C264S037330, C264S176100, C264S209100, C264S331110, C428S034100, C428S035200, C428S035700, C428S035800, C428S035900, C428S036600, C428S036700, C428S474400, C428S475200, C428S475500, C524S434000, C524S435000, C524S538000, C525S420000, C525S425000, C525S432000, C525S433000

Reexamination Certificate

active

07955533

ABSTRACT:
Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties.

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