A process for improving the quality of a thermoplastic, preferably a polyethylene terephthalate film. Slit rolls of polyethylene terephthalate film are exposed to an environment maintained at a temperature in the range of between about 15 DEG C. and 35 DEG C. above the temperature at which the rolls were wound for a period of at least 24 hours. This process significantly decreases the formation of surface defects that otherwise form on the surface of the film in the rolls not so treated.
申请公布号
DE2439985(C2)
申请公布日期
1983.08.11
申请号
DE19742439985
申请日期
1974.08.21
申请人
AMERICAN HOECHST CORP., 08876 SOMERVILLE, N.J., US
发明人
CURTIS, JAMES ROSS, TAYLORS, GREENVILLE, S.C., US;PALMER, THOMAS ALEN, NOTASULGA, ALA., US;WILSON, BILLY JOE, COLUMBIA, MD., US
