公开(公告)号：US20190240868A1

公开(公告)日：2019-08-08

申请号：US16316932

申请日：2017-07-07

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Mark A. SANNER ,  Peter JOHNSON ,  Robert Russell GALLUCCI ,  Franklin EHRENSBECK

IPC: B29B9/06 ,  B29B9/12 ,  B29B9/16 ,  B29C48/305 ,  B29C48/69 ,  C08J3/12 ,  C08J5/18 ,  B29C48/00 ,  B29C48/05 ,  B29C48/08

CPC classification number: B29B9/06 ,  B29B9/12 ,  B29B9/16 ,  B29C48/0013 ,  B29C48/0022 ,  B29C48/04 ,  B29C48/05 ,  B29C48/08 ,  B29C48/287 ,  B29C48/30 ,  B29C48/305 ,  B29C48/69 ,  B29C2793/0027 ,  C08J3/12 ,  C08J5/18 ,  C08J2369/00 ,  C08J2379/08

Abstract: 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.