Transparent biaxially-oriented thin crystallisable thermoplastic films containing UV stabilizer and optical brightener to impart sufficient UV stability to allow outdoor uses

摘要

A transparent biaxially-oriented 1-500 mu m film based mainly on a crystallisable thermoplast also contains a UV stabilizer and an optical brightener. An Independent claim is also included for production of the film by melt extrusion of the composition onto a cooled roll, followed by biaxial stretching and winding up.