US4645736A — Waterproof photographic paper support

Claim 1

Independent Claim 89 words

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═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.

Claim 2

Dependent Claim 89 words

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═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.

Claim 3

Dependent Claim 28 words

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.

Claim 4

Dependent Claim 15 words

The paper support of claim 1, wherein said barrier layer has a thickness of 3-30μ.

Claim 5

Dependent Claim 11 words

The paper support of claim 3, wherein said thickness is 4-20μ.

Claim 6

Dependent Claim 35 words

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.

Claim 7

Dependent Claim 25 words

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.

Claim 8

Dependent Claim 33 words

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.

Claim 9

Dependent Claim 21 words

The paper support of claim 4, wherein said barrier layer is selected from the group consisting of polyolefin and polyolefin copolymer.

Claim 10

Dependent Claim 22 words

The paper support of claim 4, wherein said barrier layer is selected from the group consisting of acrylate, methacrylate and copolymers thereof.

Claim 11

Dependent Claim 24 words

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.

Claim 12

Dependent Claim 34 words

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.

Claim 13

Dependent Claim 13 words

The paper support of claim 1, wherein said paper is a sized paper.

Claim 14

Dependent Claim 118 words

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═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.

Claim 15

Dependent Claim 118 words

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═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.

Claim 16

Dependent Claim 67 words

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.

Claim 17

Dependent Claim 21 words

The process of claim 13, wherein said barrier layer is a thermoplastic resin which is extrusion coated to form said layer.

Claim 18

Dependent Claim 21 words

The process of claim 14, wherein said barrier layer is a thermoplastic resin which is extrusion coated to form said layer.

Claim 19

Dependent Claim 32 words

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.

Claim 20

Dependent Claim 32 words

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.

Claim 21

Dependent Claim 17 words

The process of claim 14, wherein the pre-treatment of the surface of the barrier layer includes oxidation.

Claim 22

Dependent Claim 12 words

The process of claim 19, wherein said oxidation is by corona treatment.

Claim 23

Dependent Claim 17 words

The process of claim 14, wherein the pre-treatment of the barrier layer is a separate adhesion coating.

Claim 24

Dependent Claim 22 words

The process of claim 13, wherein the hardened coating is hardened by an electron beam with an energy dosage of 5-60 Joules/g.

Claim 25

Dependent Claim 22 words

The process of claim 14, wherein the hardened coating is hardened by an electron beam with an energy dosage of 5-60 Joules/g.

Claim 26

Dependent Claim 32 words

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.

Claim 27

Dependent Claim 32 words

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.

Claim 28

Dependent Claim 62 words

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.

Claim 29

Dependent Claim 36 words

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.

Claim 30

Dependent Claim 36 words

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.

Claim 31

Dependent Claim 36 words

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.

Claim 32

Dependent Claim 37 words

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.

Claim 33

Dependent Claim 37 words

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.

Claim 34

Dependent Claim 37 words

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.

Claim 35

Dependent Claim 12 words

The process of claim 13, wherein said paper is a sized paper.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-02-23	1990-08-25	1991-02-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-02-23	1994-08-25	1995-02-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-02-23	1998-08-25	1999-02-24	$7700.00	Window Closed / Lapsed

Waterproof photographic paper support

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