Clarity and adjustable shrinkage of shrink films using miscible

Details Clarity and adjustable shrinkage of shrink films using miscible Clarity and adjustable shrinkage of shrink films using miscible

1997-01-21

1999-01-12

Jagannathan, Vasu

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...

C08K 336, C08G 6302

Patent

active

058591168

ABSTRACT:
A heat-shrinkable film is made from a copolyester blend of 1 to 98.5 weight percent PETG copolyester, 98.5 to 1 weight DEG modified PET copolyester having a b* value of less than 15, 0.5 to 3 weight percent anti-blocking agent, and optionally, 5 to 15 weight percent crystallizable polyester. The PETG copolyester has a dicarboxylic acid component of at least 95 mol percent terephthalic acid and a diol component of 65 to 80 mol percent ethylene glycol and 35 to 20 mol percent 1,4-cyclohexane-dimethanol. The DEG modified PET copolyester has a dicarboxylic acid component of at least 75 mol percent terephthalic acid; a diol component of 10 to 50 mol percent diethylene glycol and 50 to 90 mol percent ethylene glycol; catalyst residues of 20 to 100 ppm manganese, 50 to 300 ppm antimony, 0 to 100 ppm titanium and 40 to 150 ppm phosphorus; and color control agent residues of (i) 40 to 100 ppm cobalt, (ii) 1.5 to 10 ppm of blue compounds of substituted 1,4-bis(2,6-dialylanilino) anthraquinones and 0.5 to 6 ppm of red compounds of anthraquinones, or (iii) 0.5 to 10 ppm of 1-cyano-3H-dibenz isoquinoline-2,7-diones.

REFERENCES:
patent: 4745174 (1988-05-01), Pruett et al.
patent: 4939232 (1990-07-01), Fukuda et al.
patent: 5372864 (1994-12-01), Weaver et al.
patent: 5688899 (1997-11-01), Strand et al.

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