Continuous production of a photosensitive recording element
First Claim
1. A continuous process for the production of a photopolymerizable recording layer (A), in which the photopolymerizable recording layer (A) is produced from two or more individual strata (an) which lie one on top of the other, are firmly bonded to one another and have the same or roughly the same composition or different compositions, by firmly bonding the said strata in the nip of a calender in one operation, the said continuous process comprising the steps of(1) separately melting the mixtures (an) used for the production of the individual strata (an) and combining the resulting, separate material streams (an) in the molten state even before they enter the calender nip, without mixing them through turbulence,(2) shaping the molten material streams (an) to give molten sheet-like structures (an) lying one on top of the other, before they enter the calender nip, before, during or directly after the said streams have been combined, without mixing them through turbulence,(3) introducing the molten sheet-like structures (an) lying one on top of the other into the calender nip, one or both of the two outer molten sheet-like structures (an) in contact with the calender rollers forming a rotating melt bead or rotating bank, and(4) calendering the molten sheet-like structures (an) lying one on top of the other with production of the photopolymerizable recording layer (A) consisting of individual strata (an) which lie one on top of the other and are firmly bonded to one another.
1 Assignment
0 Petitions
Accused Products
Abstract
A novel, improved continuous process for the production of a photosensitive recording element is described, whose photopolymerizable recording layer (A) consists of two or more individual strata (an) lying one on top of the other and firmly bonded to one another. The individual strata (an) may be of the same or roughly the same composition or of different compositions. In the novel, improved continuous process, the mixtures (an) used for the production of the individual strate (an) are prepared separately from one another and melted and, as separate molten material streams (an), are combined even before entering the nip of a calender, without the said streams mixing as a result of turbulence. During, before or directly after they have been combined, the molten material streams (an) are formed into molten sheet-like structures (an) lying one on top of the other, without the said streams mixing as a result of turbulence. Thereafter, the molten sheet-like structures (an) lying one on top of the other are introduced into the calender nip, one or both of the two outer molten sheet-like structures (an) in contact with the calender rollers forming a rotating melt bead or rotating bank. In the calender nip itself, the said sheet-like structures (an) are then calendered with production of the photopolymerizable recording layer (A) consisting of individual strata (an) lying one on top of the other and firmly bonded to one another.
22 Citations
17 Claims
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1. A continuous process for the production of a photopolymerizable recording layer (A), in which the photopolymerizable recording layer (A) is produced from two or more individual strata (an) which lie one on top of the other, are firmly bonded to one another and have the same or roughly the same composition or different compositions, by firmly bonding the said strata in the nip of a calender in one operation, the said continuous process comprising the steps of
(1) separately melting the mixtures (an) used for the production of the individual strata (an) and combining the resulting, separate material streams (an) in the molten state even before they enter the calender nip, without mixing them through turbulence, (2) shaping the molten material streams (an) to give molten sheet-like structures (an) lying one on top of the other, before they enter the calender nip, before, during or directly after the said streams have been combined, without mixing them through turbulence, (3) introducing the molten sheet-like structures (an) lying one on top of the other into the calender nip, one or both of the two outer molten sheet-like structures (an) in contact with the calender rollers forming a rotating melt bead or rotating bank, and (4) calendering the molten sheet-like structures (an) lying one on top of the other with production of the photopolymerizable recording layer (A) consisting of individual strata (an) which lie one on top of the other and are firmly bonded to one another.
Specification