Printing sleeve with an integrated printing surface
View Patent ↗A seamless printing sleeve comprising a hollow cylindrical base and a seamless imageable surface as its outermost layer is described. The imageable surface acts as an integral flexographic printing surface. Preferably the printing sleeve comprises an intermediate photopolymer or resilient polymer layer between the outer surface of the base and the imageable surface. Also, preferably the base is uniformly transparent or translucent to actinic radiation.
1. A hollow cylindrical printing sleeve with an integral imageable printing surface comprising:
a. a hollow cylindrical base;
b. a substantially continuous floor layer comprised of a cured polymer selected from the group consisting of photopolymers, and polymers with a resilience of at least 40% when cured; and
c. at least one layer of an imageable material.
2. A printing sleeve according to claim 1 wherein the base comprises a cured polymer resin which is expandable using a fluid pressure of less than about 100 psi and which contracts to its original size when the fluid pressure is removed.
3. A printing sleeve according to claim 1 wherein the printing sleeve also comprises a layer of compressible material.
4. A printing sleeve according to claim 1 wherein the floor layer comprises a photopolymer.
5. A printing sleeve according to claim 1 wherein the imageable material comprises a photopolymer.
6. A printing sleeve according to claim 1 wherein the printing sleeve also comprises a masking layer on top of the outermost surface of imageable material.
7. A printing sleeve according to claim 1 wherein the base is substantially uniformly transparent or translucent to actinic radiation.
8. A printing sleeve according to claim 2 wherein the base comprises a fiber reinforced polymer.
9. A printing sleeve according to claim 3 wherein the compressible material has a Shore A hardness of from 30 to 70 and a resilience of from 40 to 70%.
10. A printing sleeve according to claim 4 wherein the photopolymer comprises an A-B-A type block copolymer.
11. A printing sleeve according to claim 5 wherein the photopolymer comprises an A-B-A type block copolymer.
12. A printing sleeve according to claim 6 wherein the masking layer is selectively ablatable using laser energy at a selected wavelength and power.
13. A printing sleeve according to claim 5 wherein the printing sleeve also comprises a masking layer on top of the outermost layer of imageable material.
14. A printing sleeve according to claim 13 wherein the base comprises fiber reinforced polymer.
15. A printing sleeve according to claim 13 wherein the base is substantially uniformly transparent or translucent to actinic radiation.
16. A printing sleeve according to claim 14 wherein the photopolymer comprises an A-B-A type copolymer.
17. A printing sleeve according to claim 14 wherein the masking layer is selectively ablatable using laser energy at a selected wavelength and power.
18. A printing sleeve according to claim 1 wherein the floor layer also comprises microspheres.
19. A hollow cylindrical printing sleeve with an integral imageable printing surface comprising:
(a) a hollow cylindrical base which is substantially uniformly transparent or translucent to actinic radiation;
(b) at least one layer of an imageable material on the outer surface of the base, wherein said imageable material comprises a photopolymer wherein the base comprises a cured polymer resin which is expandable using fluid pressure of less than about 100 psi and which contracts to its original size when the fluid pressure is removed.
20. A printing sleeve according to claim 19 wherein the printing sleeve also comprises a masking layer on top of the outermost layer of imageable material.
21. A printing sleeve according to claim 19 wherein the photopolymer comprises an A-B-A type block copolymer.
22. A printing sleeve according to claim 20 wherein the masking layer is selectively ablatable using laser energy at a selected wavelength and power.
23. A printing sleeve according to claim 22 wherein the photopolymer comprises an A-B-A type block copolymer.
24. A printing sleeve according to claim 19 wherein the sleeve also comprises a substantially continuous floor layer between the hollow cylindrical base and the at least one layer of imageable material, wherein said floor layer is substantially uniformly transparent or translucent to actinic radiation and where said floor layer is comprised of a cured polymer selected from the group consisting of photopolymers, and polymers with a resilience of at least 40% when cured.
25. A printing sleeve according to claim 24 wherein said floor layer also comprises micropheres.