Pigmented amorphous sheet with good optical properties etc. - made by extruding pigment-contg. crystallisable thermoplastic, with (in)organic pigment(s) and smoothing on multi-roll calender

摘要

Coloured amorphous sheet (I) with a thickness of 1-20 mm,contg. a crystallisable thermoplastic (II) as the main component, together with organic and/or inorganic pigment(s) (III). Also claimed is a process for the prodn. of (I), by (a) melting (II) with (III) in an extruder, (b) extruding the melt through a die, (c) calibrating, smoothing and cooling on a glazing mill with at least two rollers, the first of which is at a temp. of 50-80[deg]C, and (d) cutting to size.