VERFAHREN ZUR HERSTELLUNG VON POLYAETHYLENTEREPHTHALATFOLIEN

• Main Authors: CURTIS, JAMES ROSS, GREENVILLE, S.C, WILSON, BILLY JOE, COLUMBIA, MD, PALMER, THOMAS ALLEN, NOTASULGA, ALA
• Format: Patent
• Language: German
• Published: 06.03.1975
• Edition: 2
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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.