摘要 |
<p>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.</p> |
申请人 |
E.I. DU PONT DE NEMOURS & CO., INC., WILMINGTON, DEL., US |
发明人 |
BOHM, DIETER, DR. DIPL.-CHEM., W-6228 ELTVILLE, DE;FAUST, RAIMUND-JOSEF, DR. DIPL.-CHEM., W-6200 WIESBADEN, DE;GERSDORF, JOACHIM, DR. DIPL.-CHEM., W-6200 WIESBADEN, DE;PETRY, RUDOLF, DIPL.-ING., W-6200 WIESBADEN, DE;SCHLOSSER, HANS JOACHIM, DR. DIPL.-CHEM., W-6200 WIESBADEN, DE |