Coating method and planographic printing plate
The present invention provides a method of coating a coating solution comprising: providing a web; providing a coating solution; coating the coating solution on at least one surface of the web; and drying the coating solution to form a coated layer, wherein a temperature of the web is maintained at 35° C. or more during coating. According to the coating method, a multi-layered planographic printing plate can be manufactured at low energy cost and running cost.
1 - 8 . (canceled)
9 . A planographic printing plate, comprising:
a support web obtained by graining at least one surface of an aluminum web;
a plate-making layer formed on the grained surface of the support web; and
a protective layer that is superposed on the plate-making layer and protects the plate-making layer,
wherein the plate-making layer and the protective layer are formed by coating and drying respectively a plate-making layer forming solution and a protective layer forming solution, with a surface temperature of the support web maintained at a temperature of 35° C. or more.
10 . The planographic printing plate according to claim 9 , further comprising an intermediate layer located between the plate-making layer and the protective layer,
wherein the intermediate layer is formed by coating and drying an intermediate layer forming solution with the support web maintained at a temperature of 35° C. or more.
11 . The planographic printing plate according to claim 10 , wherein a temperature of the support web, when the intermediate layer forming solution is coated, is in a range of 35° C. to 0.8 Tb low (° C.).
12 . The planographic printing plate according to claim 10 , wherein the intermediate layer is a layer having oxygen barrier properties.
13 . The planographic printing plate according to claim 9 , wherein, when both the plate-making layer forming solution and the protective layer forming solution are coated, a temperature of the support web is in a range of 35° C. to 0.8 Tb low (° C.).
14 . The planographic printing plate according to claim 9 , wherein the plate-making layer is a photo-polymerizing type laser-sensitive layer that is polymerized by exposure to visible light or to ultra violet light, and the protective layer is an oxygen barrier layer that protects the photo-polymerizing type laser-sensitive layer from oxygen in the air.
15 . A planographic printing plate, comprising:
a support web obtained by graining at least one surface of an aluminum web; and
a plate-making layer formed on the grained surface of the support web,
wherein the planographic printing plate is formed by coating the coating solution in either a state where a web is wider than a predetermined value, or in a state where the web is thicker than a predetermined value, or in both such states, and with a temperature of the web of the plate-making layer maintained at a temperature of 35° C. or more.
16 . The planographic printing plate according to claim 15 , wherein the plate-making layer is formed by coating a plate-making layer forming solution on a support web maintained at a temperature of between 35° C. and 0.8 Tb low (° C.), and thereafter drying the support web.
17 . The planographic printing plate according to claim 15 , wherein the plate-making layer is a photo-polymerizing type laser-sensitive layer that is polymerized by exposure to visible light or to ultra violet light.
18 . The planographic printing plate according to claim 17 , further comprising an oxygen barrier layer that protects the photo-polymerizing type laser-sensitive layer from oxygen in the air,
wherein the oxygen barrier layer is superposed on the photo-polymerizing type laser-sensitive layer.
19 . The planographic printing plate according to claim 18 , wherein an intermediate layer of an oxygen barrier resin is formed between the photo-polymerizing type laser-sensitive layer and the oxygen barrier layer.