Polyester composition which is particularly suitable for use in

Details Polyester composition which is particularly suitable for use in Polyester composition which is particularly suitable for use in

1989-03-27

1991-06-11

Sluby, P. C.

Stock material or miscellaneous articles

Hollow or container type article

428 357, 428 3692, 428480, 428500, 426234, 525177, B32B 108

Patent

active

050231375

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. These thermoplastic resin compositions are comprised of (a) from about 92 to about 99 weight percent polyethylene terephthalate having an intrinsic viscosity of from at least about 0.7 dl/g; (b) from about 1 to about 8 weight percent of a polyethylene ionomer; and (c) optionally an effective amount of a heat stabilizer. The subject invention also deals with thermoforming such thermoplastic resin compositions into thin walled articles having a crystallinity within the range of about 10% to about 40%.

REFERENCES:
patent: 4572852 (1986-02-01), Gartland et al.
patent: 4740377 (1988-04-01), Dawes et al.

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