PROCESS FOR THE PREPARATION OF PHOTOPOLYMER PLATES

摘要

A continuously operating process for the preparation of photopolymer plates of accurate thickness and constant thickness is described, in which the constituents of the photopolymer layer are melted in a screw extruder and the melt is fed by means of a geared melt pump to the slot die, the melt emerging from the slot die not forming a curled bead in a following calender nip. The photopolymer plates prepared in this way have a great homogeneity of the constituents of the photopolymerisable mixture, exhibit a high thickness accuracy and constancy, are transparent, do not have a tendency for speckles to form and ensure a high storage stability.