Heat-sealable, heat-shrinkable, biaxially oriented polyester...

Details Heat-sealable, heat-shrinkable, biaxially oriented polyester... Heat-sealable, heat-shrinkable, biaxially oriented polyester...

B - Operations, Transporting

29

C

18/1041

B29C 55/14 (2006.01) C08G 63/183 (2006.01) C08G 63/672 (2006.01) B29C 71/00 (2006.01)

Patent

CA 1040374

Abstract of the Disclosure A heat-sealable, heat-shrinkable, biaxially oriented polyester film, e.g., modified polyethylene terephthalate, is provided which is usable in making shrink packages having improved seals and improved op- tics by reason of having: a relative viscosity (at 1% concentration in 60/40 tetrachloroethane/phenol at 30°C.) of at least 1.80; substantially balanced latent shrinkage of from about 31% to 47% at 100°C.; an average shrinkage force of less than about 1.000 psi (70 kg/cm2) at 100°C.; and a melting point of from about 215°C. to 230°C.; haze of less than 5%.

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