Shaped articles from poly(ethylene terephthalate) modified with

Details Shaped articles from poly(ethylene terephthalate) modified with Shaped articles from poly(ethylene terephthalate) modified with

1983-11-14

1985-07-02

McCamish, Marion E.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428221, 528304, 528279, B65D 0000, B32B 702, C08G 6354

Patent

active

045268223

ABSTRACT:
Copolyesters of poly(ethylene terephthalate) modified with greater than 10 to about 40 mol % trans-4,4'-stil-benedicarboxylic acid can be melt spun to give as-spun fibers with exceptionally low shrinkage at elevated temperatures and with tensile strengths and moduli equivalent to those of fully oriented poly(ethylene terephthalate). They may be drafted to give fibers with tenacities >8 g/den and moduli >150 g/den. In addition to the unobviously high tenacities and moduli of as-spun fibers, oriented shaped articles, such as films and bottles, of copolyesters of this invention have lower gas permeabilities than poly(ethylene terephthalate). For example, the oxygen permeability of these copolyesters is 25 to 50% lower than that of poly(ethylene terephthalate).

REFERENCES:
patent: 2657195 (1953-10-01), Toland
patent: 4288478 (1981-09-01), Kinoshita et al.

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