Method and blanket for transferring a paste image from engraved plate to substrate
View Patent ↗A blanket for transferring a paste image from an engraved plate to a substrate is provided. The blanket includes a foam, a PET layer on the foam, and a paste transfer layer on the PET layer. The foam has a Shore A hardness of 20 to 80 and a thickness of 0.5 mm to 1.5 mm, wherein the foam has a higher Shore A hardness corresponding to a greater thickness.
1. A blanket for transferring a paste image from an engraved plate to a substrate, comprising:
a foam;
a PET layer on the foam, wherein the PET layer has a thickness of 250 μm and Young's modulus of 3 GPa; and
a paste transfer layer on the PET layer, wherein the paste transfer layer is silicone rubber with a Shore A hardness of 50 and a thickness of 0.75 mm to 1.0 mm,
wherein the foam has a Shore A hardness of 35 to 80 with a thickness of 1 mm, or a Shore A hardness of 20 to 35 with a thickness of 0.5 mm.
2. The blanket as claimed in claim 1 , wherein the foam comprises polyurethane, polyethylene, nitrile-butadiene rubber, silicone, or a combination thereof.
3. The blanket as claimed in claim 1 , wherein the PET layer has a Young's modulus of 3 to 5 GPa.
4. The blanket as claimed in claim 1 , wherein the PET layer has a thickness of 100 μm to 300 μm.
5. The blanket as claimed in claim 1 , wherein the silicone rubber, fluoro rubber, fluorosilicone rubber, a combination thereof, or a multi-layered structure thereof is cured by addition cure, peroxide cure, condensation cure, or UV cure.
6. The blanket as claimed in claim 1 , wherein the paste transfer layer has a Shore A hardness of 40 to 60.
7. The blanket as claimed in claim 1 , wherein the paste transfer layer has a thickness of 0.5 mm to 1.0 mm.
8. The blanket as claimed in claim 1 , wherein a surface of the paste transfer layer and water have a contact angle of 100° to 130°.
9. The blanket as claimed in claim 1 , wherein a surface of the paste transfer layer has a roughness of 0.050 μm to 0.200 μm.
10. The blanket as claimed in claim 1 , further comprising an adhesive between the foam and the PET layer, between the PET layer and the paste transfer layer, or a combination thereof.
11. A method of transferring a paste image from an engraved plate to a substrate, comprising:
providing an engraved plate with an intaglio pattern;
filling a paste into the intaglio pattern;
transferring the paste in the intaglio pattern to the surface of a blanket; and
transferring the paste on the blanket to a substrate,
wherein the blanket includes:
a foam;
a PET layer on the foam, wherein the PET layer has a thickness of 250 μm and Young's modulus of 3 GPa; and
a paste transfer layer on the PET layer, wherein the paste transfer layer is silicone rubber with a Shore A hardness of 50 and a thickness of 0.75 mm to 1.0 mm,
wherein the foam has a Shore A hardness of 35 to 80 with a thickness of 1 mm, or a Shore A hardness of 20 to 35 with a thickness of 0.5 mm.
12. The method as claimed in claim 11 , wherein the foam comprises polyurethane, polyethylene, nitrile-butadiene rubber, silicone, or a combination thereof.
13. The method as claimed in claim 11 , wherein the PET layer has a Young's modulus of 3 to 5 GPa.
14. The method as claimed in claim 11 , wherein the PET layer has a thickness of 100 μm to 300 μm.
15. The method as claimed in claim 11 , wherein the paste transfer layer has a Shore A hardness of 40 to 60.
16. The method as claimed in claim 11 , wherein the paste transfer layer has a thickness of 0.5 mm to 1.0 mm.
17. The method as claimed in claim 11 , wherein a surface of the paste transfer layer and water have a contact angle of 100° to 130°.
18. The method as claimed in claim 11 , wherein a surface of the paste transfer layer has a roughness of 0.050 μm to 0.200 μm.
19. The method as claimed in claim 11 , further comprising an adhesive between the foam and the PET layer, between the PET layer and the paste transfer layer, or a combination thereof.
20. The blanket as claimed in claim 1 , wherein the blanket has an engagement of 0.3 mm to 0.5 mm under a pressure of 0.15 MPa to 0.25 MPa.
21. The method as claimed in claim 11 , wherein the blanket has an engagement of 0.3 mm to 0.5 mm under a pressure of 0.15 MPa to 0.25 MPa.
22. A method for forming a blanket, comprising:
providing a foam, wherein the foam has a Shore A hardness of 35 to 80 with a thickness of 1 mm, or a Shore A hardness of 20 to 35 with a thickness of 0.5 mm;
providing a PET layer on the foam, wherein the PET layer has a thickness of 250 μm and Young's modulus of 3 GPa; and
providing a paste transfer layer on the PET layer, wherein the paste transfer layer is silicone rubber with a Shore A hardness of 50 and a thickness of 0.75 mm to 1.0 mm.
23. The blanket as claimed in claim 1 , wherein the foam is polyurethane.
24. The method as claimed in claim 11 , wherein the paste includes metal particles, polymer, and organic solvent.