Process and apparatus for the manufacture of continuous sheets or films of plastics materials.

摘要

In the manufacture of continuous sheets or films of plastics material, especially by calendering, an improved stripping process and apparatus control the degree of residual strain in such sheets and films and increase production rates. In preferred embodiments of the process and apparatus, sheets and films of substantially uniform side-to-side texture are obtained. The apparatus includes, for instance, a bottom-fed "L" calender comprising four rolls (10, 11, 10a, 11a). Stripper rolls (12, 13, 12a) take the sheet or film off the top roll (11 a) of the calender and are spaced from it. Also, between the nip formed by the top calender rolls (10a, 11a) and the nearest roll (12), the sheet or film passes round another stripper roll (15) rotating in the same direction as the top calender roll (11a).