Method and apparatus for producing plastics films of high optical quality and products so obtained.

摘要

1. Method of making sheets of plastics material (10) of good optical quality, by depositing at least one liquid mass (9) on a movable planar support to form at least one layer and by heating to effect solidification of the layer or layers formed, characterised in that the liquid mass forming the plastics material is deposited on a flexible ribbon (2, 17) which is stretched longitudinally and transversely of which the surface is freed from creases and rendered perfectly smooth by heating (7, 25) immediately before deposition of the liquid mass, this support itself passing over a fixed table (11, 23) placed at least at the location where the liquid mass is deposited.