Copolyester and hollow container and oriented film comprising th

Details Copolyester and hollow container and oriented film comprising th Copolyester and hollow container and oriented film comprising th

1991-12-12

1993-08-24

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528194, 528271, C08G 6300, C08G 6302, C08G 6700

Patent

active

052390454

ABSTRACT:
A copolyester comprising a dicarboxylic acid component comprising (a) 80 to 99.5 mol % of terephthalic acid or an ester forming derivative thereof and (b) 0.5 to 4.5 mol % of a phenylenedioxy diacetic acid or an ester forming derivatives thereof and a diol component is described. Hollow containers and stretched film produced from the copolyester are further described. The copolyester has a high transparency, superior gas barrier property, mechanical strength, water resistance and heat resistance. In addition, since the copolyester has a low oligomer content, it scarcely contaminates a mold used in molding process, which leads to a high productivity. The molded article produced from the copolyester can be used widely as packaging materials including various films, sheets and containers. Moreover, since a molded article having superior properties is obtained form the copolyester alone, it is possible to manufacture various packaging materials without using a complicated apparatus and complicated process.

REFERENCES:
patent: 4440922 (1984-04-01), Barbee et al.
patent: 4546170 (1985-10-01), Barbee et al.
patent: 4552948 (1985-11-01), Barbee et al.
patent: 4959421 (1990-09-01), Hirahara et al.
patent: 5030705 (1991-09-01), Hirahara et al.

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