Printable film
The invention relates to printable films comprising a substrate and at least a surface layer, said layer covering at least one face of said substrate and comprising a water-dispersible polymer and an ethylenically unsaturated compound; to a process for the manufacture of such films; to printed films and especially to printed labels obtained from such printable films.
1. A film printable with UV curable inks, said film comprising a substrate and at least a surface layer, said layer covering at least one face of said substrate and consisting essentially of a water-dispersible polymer that provides a smooth film surface for printing and an ethylenically unsaturated compound that plasticizes said layer, said ethylenically unsaturated compound selected from polyfunctional acrylates resulting from the esterification of a polyol with (meth)acrylic acid or polyallyl derivatives, whereby said surface layer does not contain an additional polymerization photoinitiator, wherein said water-dispersible polymer is an acrylic polymer and said ethylenically unsaturated compound is present in an amount from 2% to 90% by weight of the acrylic polymer, wherein all percentages are dry weight based.
2. The printable film according to claim 1 , wherein the substrate is selected from the group consisting of polymer films, polyolefin films, papers, synthetic papers, woven fabrics, nonwoven fabrics, ceramic sheets, metallic fiber sheets, metalized sheets (film), metallic foils, metallic plates, and multilayer composite sheets formed by combination of said materials.
3. The printable film according to claim 2 , wherein the substrate is an oriented polypropylene film.
4. The printable film according to claim 1 , wherein the water-dispersible polymer consists essentially of a homopolymer of (meth)acrylic acid monomer or alkyl(meth)acrylate monomer, the alkyl radical having 1 to 10 carbon atoms, or a copolymer of two or more of said monomers or optionally of other vinylic or allylic compounds.
5. The printable film according to claim 1 , further comprising, intermediate between said substrate and said surface layer(s), a primer layer.
6. The printable film according to claim 1 , wherein only one face is coated with a surface layer and wherein the reverse face of the substrate is covered with a pressure-sensitive adhesive layer.
7. A film printable with UV curable inks, said film comprising a substrate and at least a surface layer, said layer covering at least one face of said substrate and consisting essentially of a water-dispersible polymer that provides a smooth film surface for printing and an ethylenically unsaturated compound that plasticizes said layer, said ethylenically unsaturated compound selected from polyfunctional acrylates resulting from the esterification of a polyol with (meth)acrylic acid or polyallyl derivatives, whereby said surface layer does not contain an additional polymerization photoinitiator, wherein said water-dispersible polymer is an acrylic polymer and said ethylenically unsaturated compound is present in an amount from 2% to 90% by weight of the acrylic polymer, wherein all percentages are dry weight based, and wherein the film is resistant to freezing water and boiling water conditions.
8. The printable film according to claim 7 , wherein the acrylic polymer comprises polyurethane acrylate.
9. A film printable with UV curable inks, said film comprising a substrate and at least a surface layer, said layer covering at least one face of said substrate and consisting essentially of a water-dispersible polymer that provides a smooth film surface for printing and an ethylenically unsaturated polyfunctional acrylates that plasticizes said layer, whereby said surface layer does not contain an additional polymerization photoinitiator, wherein said water-dispersible polymer is an acrylic polymer, and said ethylenically unsaturated compound is present in an amount from 2% to 15% by weight of the acrylic polymer, wherein all percentages are dry weight based.
10. The film of claim 1 , wherein said ethylenically unsaturated compound is present in an amount from 2% to 15% by weight of the acrylic polymer.
11. The film of claim 7 , wherein said ethylenically unsaturated compound is present in an amount from 2% to 15% by weight of the acrylic polymer.
12. The film of claim 1 , wherein the ethylenically unsaturated compound does not react with said water-dispersible polymer when said surface layer is irradiated with UV radiation.
13. The film of claim 7 , wherein the ethylenically unsaturated compound does not react with said water-dispersible polymer when said surface layer is irradiated with UV radiation.
14. A film printable with UV curable inks, said film comprising a substrate and at least a surface layer, said layer covering at least one face of said substrate and comprising a water-dispersible polymer that provides a smooth film surface for printing and an ethylenically unsaturated compound that plasticizes said layer, said ethylenically unsaturated compound selected from polyfunctional acrylates resulting from the esterification of a polyol with (meth)acrylic acid or polyallyl derivatives, whereby said surface layer does not contain an additional polymerization photoinitiator, wherein said water-dispersible polymer is an acrylic polymer and said ethylenically unsaturated compound is present in an amount from 2% to 90% by weight of the acrylic polymer, wherein all percentages are dry weight based.
15. The film of claim 14 , wherein the substrate is an oriented polypropylene film.
16. The film of claim 14 , wherein the ethylenically unsaturated compound does not react with said water-dispersible polymer when said surface layer is irradiated with UV radiation.