Multilayered, transparent coloured plate made of a crystallising thermoplastic material, process for producing the same and its use

摘要

A multilayered, transparent coloured amorphous plate with 1 to 20 mm thickness contains a crystallising thermoplastic material as its main component and a dye which is soluble in the thermoplastic material. The plate consists of at least one covering layer and at least one core layer, the standard viscosity of the thermoplastic material of which the core layer is made being higher than that of the thermoplastic material of the adjacent covering layer(s).