Claims
- 1. A waterproof, paper support material for photographic coatings comprising:
- a photographic base paper,
- a coating of electron beam radiation-hardened varnish on said paper for receiving the photographic coating thereon, said coating including C.dbd.C bonds before radiation hardening, and
- a barrier layer having a low permeability to acrylate monomer sufficient to substantialy reduce the fogging of a photographic coating, when present, which fogging would otherwise result due to contact of said radiation hardened varish and said base paper, said barrier layer being arranged between said paper and said varnish coating.
- 2. The paper support of claim 1, wherein said barrier layer has a permeability to acrylate monomer of at least 100 seconds, and is free of free wetting agent.
- 3. The paper support of claim 1, wherein said barrier layer has a thickness of 3-30.mu..
- 4. The paper support of claim 3, wherein said thickness is 4-20.mu..
- 5. The paper support of claim 1, wherein said barrier layer comprises a polymer selected from the group consisting of film-forming material applied by extrusion coating, a coating of an aqueous solution and an aqueous dispersion.
- 6. The paper support of claim 1, wherein said barrier layer contains ingredients selected from the group consisting of pigments, dyestuffs, brighteners, plasticizers, electrolytes and additives.
- 7. The paper support of claim 5, wherein said barrier layer contains white pigments from the group consisting of titanium dioxide, zircon oxide, zinc oxide, zinc sulfide, antimony oxide, barium sulfate and calcium carbonate.
- 8. The paper support of claim 4, wherein said barrier layer is selected from the group consisting of polyolefin and polyolefin copolymer.
- 9. The paper support of claim 4, wherein said barrier layer is selected from the group consisting of acrylate, methacrylate and copolymers thereof.
- 10. The paper support of claim 4, wherein said barrier barrier layer comprises a film-forming starch derivative with a proportion of a synthetic film-forming polymer.
- 11. The paper support of claim 4, wherein said barrier layer is selected from the group consisting of polyvinyl alcohol or a combination thereof with other polymers which are either water-soluble or dispersible in water.
- 12. The paper support of claim 1, wherein said paper is a sized paper.
- 13. A process for the manufacture of a waterproof support material for photographic coatings comprising:
- applying a barrier layer having a low permeability to acrylate monomer on at least one surface of a photographic base paper;
- coating said barrier layer with a coatable mixture including C.dbd.C bonds which is capable of being radiation hardened by electron beam and of receiving the photgraphic coating thereon when hardened; and
- hardening said coatable mixture above the barrier layer with an electron beam, said low permeability to acrylate monomer of said barrier layer being sufficient to substantially reduce the fogging of a photographic coating, when persent, which fogging would otherwise result due to contact of the radiation hardened coating with the base paper.
- 14. The process of claim 13, including:
- applying said barrier layer on at least one surface of said base paper;
- pre-treating the surface of said barrier layer to improve the adhesion of the hardenable coating which is to be subsequently applied thereto;
- coating the treated surface of said barrier layer with the hardenable, coatable mixture; and
- hardening said coatable mixture above the barrier layer with an electron beam.
- 15. The process of claim 13, wherein said barrier layer is a thermoplastic resin which is extrusion coated to form said layer.
- 16. The process of claim 14, wherein said barrier layer is a thermoplastic resin which is extrusion coated to form said layer.
- 17. The process of claim 13, wherein said barrier layer is formed by the application of an aqueous solution or dispersion of a film-forming substance or mixture of such substances with subsequent drying.
- 18. The process of claim 14, wherein said barrier layer is formed by the application of an aqueous solution or dispersion of a film-forming substance or mixture of such substances with subsequent drying.
- 19. The process of claim 14, wherein the pre-treatment of the surface of the barrier layer includes oxidation.
- 20. The process of claim 19, wherein said oxidation is by corona treatment.
- 21. The process of claim 14, wherein the pre-treatment of the barrier layer is a separate adhesion coating.
- 22. The process of claim 13, wherein the hardened coating is hardened by an electron beam with an energy dosage of 5-60 Joules/g.
- 23. The process of claim 14, wherein the hardened coating is hardened by an electron beam with an energy dosage of 5-60 Joules/g.
- 24. The process of claim 13, wherein the surface of the hardened coating is also pre-treated to improve adhesion, and a photographic coating is applied to the pre-treated surface of the hardened coating.
- 25. The process of claim 14, wherein the surface of the hardened coating is also pre-treated to improve adhesion, and a photographic coating is applied to the pre-treated surface of the hardened coating.
- 26. The process of claim 14, including the steps of:
- applying a coating consisting essentially of polyolefin to both surfaces of a base paper,
- pre-treatment of at least one of the surfaces of the polyolefin coatings by oxidation;
- coating the pre-treated polyolefin surface with a coatable mixture which is hardenable by an electron beam; and
- hardening the coatable mixture with an electron beam.
- 27. The process of claim 13, wherein said hardenable, coatable mixture is brought into contact with a profiling surface, is then hardened through the paper by the electron beam, and is subsequently separated from the profiling surface.
- 28. The process of claim 14, wherein said hardenable, coatable mixture is brought into contact with a profiling surface, is then hardened through the paper by the electron beam, and is subsequently separated from the profiling surface.
- 29. The process of claim 26, wherein said hardenable, coatable mixture is brought into contact with a profiling surface, is then hardened through the paper by the electron beam, and is subsequently separated from the profiling surface.
- 30. The process of claim 13, wherein said hardenable, coatable mixture is brought into contact with the profiling surface, is then hardened by the electron beam through the profiling surface, and is subsequently separated from the profiling surface.
- 31. The process of claim 14, wherein said hardenable, coating mixture is brought into contact with the profiling surface, is then hardened by the electron beam through the profiling surface, and is subsequently separated from the profiling surface.
- 32. The process of claim 26, wherein said hardenable, coatable mixture is brought into contact with the profiling surface, is then hardened by the electron beam through the profiling surface, and is subsequently separated from the profiling surface.
- 33. The process of claim 13, wherein said paper is a sized paper.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3300025 |
Jan 1983 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 565,977 filed Dec. 27, 1983, now abandoned.
US Referenced Citations (12)
Continuations (1)
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Number |
Date |
Country |
Parent |
565977 |
Dec 1983 |
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