METHOD OF MAKING AN EXTRUDED THIN FILM, AND THIN FILM SO PRODUCED

Method of making an extruded thin film comprising: melt filtering an amorphous thermoplastic composition comprising an amorphous thermoplastic polymer with a glass transition temperature Tg of 130° C. to 280° C. to form a melt filtered amorphous thermoplastic composition; extruding the melt filtered...

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Bibliographische Detailangaben
Hauptverfasser:	GALLUCCI, Robert Russell, SANNER, Mark A, JOHNSON, Peter, EHRENSBECK, Franklin
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS 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 WORKING-UP
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Beschreibung
Zusammenfassung:	Method of making an extruded thin film comprising: melt filtering an amorphous thermoplastic composition comprising an amorphous thermoplastic polymer with a glass transition temperature Tg of 130° C. to 280° C. to form a melt filtered amorphous thermoplastic composition; extruding the melt filtered amorphous thermoplastic composition into strands at a temperature TE; cooling the strands to a temperature Tc to form cooled strands; cutting the cooled strands into pellets having a length of 2.0 to 6.0 millimeters; treating the pellets at a temperature Ts to remove particulates having at least one of length, width, and height of less than 0.5 millimeters to form treated pellets; melting the treated pellets in an extruder at a temperature Tp to form a molten composition; and extruding the molten composition through a flat die to form a film having an average thickness less than or equal to 50 micrometers.