Low affinity coating blanket for rotary offset presses

Details Low affinity coating blanket for rotary offset presses Low affinity coating blanket for rotary offset presses

B - Operations, Transporting

41

F

B41F 23/00 (2006.01) B41N 10/04 (2006.01)

Patent

CA 2102347

LOW AFFINITY COATING BLANKET FOR ROTARY OFFSET PRESSES ABSTRACT The transfer layer (28) of a coating blanket (10) has a low affinity for liquid coating material or ink, rather than a high affinity which characterizes convention- al nitrile rubber and photopolymer blankets. The low affinity material, for example a fluorinated polymer or a silicone elastomer, resists wetting by the liquid media, and has a tendency to form a non-spreading bead or droplet of the liquid coating material on the transfer media surface. The low affinity surface provides smooth and quick release of the substrate from the nip between the coating blanket cylinder (12) and the impression cylinder (20). The low affinity transfer surface further inhibits the accumulation of ink and/or liquid coating material, thereby preventing split images, ghost images, offset images and back-trapping defects.

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