Thermoplastic crystalline free films

Details Thermoplastic crystalline free films Thermoplastic crystalline free films

1974-05-21

1976-05-11

Holler, Alan

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264210R, C08F 600, C08F11002, C08J 518

Patent

active

039562549

ABSTRACT:
The invention provides novel thermoplastic films produced by the blown tube process having improved and balanced characteristics. The improved film is characterized by crystallites dispersed throughout the film in amorphous areas and which is substantially free of crystalline formation, as well as having improved other properties. The film is produced by acting on a molten tube following extrusion to cool the tube to a temperature above the crystalline formation temperature, followed by an annealing step and a second cooling step to initiate solidification of said tube.

REFERENCES:
patent: 2910460 (1959-10-01), Aries
patent: 3024211 (1962-03-01), Daly
patent: 3361861 (1968-01-01), Bertinotti et al.
ASTM "Tentative Method of Test for Specular Gloss": D 523-53 T (1953).

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