Polyester packaging material

Details Polyester packaging material Polyester packaging material

1992-05-28

1994-05-10

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525166, 525173, 525174, 525176, C08L 6702

Patent

active

053107870

ABSTRACT:
A polyester packaging material having a layer formed from a polyester composition as a content contacting layer, wherein the polyester composition comprises 70-95 parts by weight of a polyethylene terephthalate copolymer and 5-30 parts by weight of an ethylene copolymer ionomer. The polyethylene terephthalate copolymer is derived from terephthalic acid (and isophthalic acid, if desired), ethylene glycol and cyclohexanedimethanol (a molar ratio of the ethylene glycol to the cyclohexanedimethanol being within the range of 95/5 to 75/25), and the polyethylene terephthalate copolymer has an endothermic peak of 180.degree. to 240.degree. C. as measured by a differential scanning calorimeter after heated at 130.degree. C. for 5 hours in nitrogen and has an endotherm of 10 to 40 Joule/g at the endothermic peak. The polyester packaging material is excellent in various properties such as odor-keeping properties, ductile properties, heat resistance, impact resistance and heat-sealing properties, so that the polyester packaging material can be used as inner materials of paper containers, inner coating materials of cans, etc.

REFERENCES:
patent: 3639527 (1972-02-01), Brinkmann
patent: 4020126 (1977-04-01), Gander et al.
patent: 4987187 (1991-01-01), Udipi et al.

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