HIGH QUALITY POROUS INK-JET MEDIA

• US 20110003097A1
• Filed: 01/31/2008
• Published: 01/06/2011
• Est. Priority Date: 01/31/2008
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Vaidyanathan, Rajasekar, Drake, Mark, Darr, Bryan, Steichen, Christine E., Fu, Xulong, Chen, Tienteh
• Application Number:
  US12/865,078
• Publication Number:
  US 20110003097A1
• Time in Patent Office: Days
• US Class Current: 428/32.21
• CPC Class Codes: B41M 2205/36 Backcoats; Back layers
• CPC Class Codes: B41M 2205/38 Intermediate layers; Layers between substrate and imaging layer
• CPC Class Codes: B41M 5/504 Backcoats
• CPC Class Codes: B41M 5/506 Intermediate layers
• CPC Class Codes: B41M 5/52 Macromolecular coatings
• CPC Class Codes: B41M 5/5218 characterised by inorganic additives, e.g. pigments, clays
• CPC Class Codes: B41M 5/5254 characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Abstract

A print medium for ink-jet printing comprises a photobase substrate, a porous ink-receiving layer and a subbing layer. The photobase substrate can include paper and a moisture barrier layer coated on at least one side of the paper. The porous ink-receiving layer can include metal oxide or semi-metal oxide particulates treated with an organosilane reagent and aluminum chlorohydrate, and a polyvinyl alcohol binder. The subbing layer can be disposed between the moisture barrier layer of the photobase and the ink-receiving layer and include a polyvinyl alcohol or a copolymer of a polyvinyl alcohol.

Claims

1. A print medium for ink-jet printing, comprising:

a) a photobase substrate, including;

i) paper, and

ii) a moisture barrier layer coated on at least one side of the paper;

b) a porous ink-receiving layer, including;

i) metal oxide or semi-metal oxide particulates treated with an organosilane reagent and an aluminum complex, and

ii) a polyvinyl alcohol or copolymer of polyvinyl alcohol binder; and

c) a subbing layer including polyvinyl alcohol or a copolymer of polyvinyl alcohol, said subbing layer disposed between the moisture barrier layer of the photobase and the porous ink-receiving layer.

2. A print medium as in claim 1, wherein the metal oxide or semi-metal oxide particulates is cationically charged.

3. A print medium as in claim 1, wherein the aluminum complex is an aluminum chlorohydrate.

4. A print medium as in claim 3, wherein the aluminum chlorohydrate is reacted with the organosilane reagent at a weight ratio of aluminum chlorohydrate to organosilane of 1:

10 to 5;

1.

5. A print medium as in claim 1, wherein the moisture barrier layer is a low density polyethylene, high density polyethylene, polypropylene, or mixtures thereof.

6. A print medium as in claim 1, wherein the moisture barrier layer on at the least one side has a coat weight from 10 g/m² to 50 g/m².

7. A print medium as in claim 1, wherein the metal oxide or semi-metal oxide particulates are selected from the group consisting of silica, alumina, titania, zirconia, aluminum silicate, calcium carbonate, and combinations thereof.

8. A print medium as in claim 1, wherein the metal oxide or semi-metal oxide particulates include silica particulates, said silica particulates comprising fumed silica having a surface area of 100 to 400 m²/g.

9. A print medium as in claim 1, wherein the organosilane reagent is an amine-containing organosilane.

10. A print medium as in claim 9, wherein the amine-containing organosilane is added at a weight ratio of amine-containing organosilane to metal oxide of 1:

50 to 1;

5.

11. A print medium as in claim 9, wherein the amine-containing silane is selected from the group consisting of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminoethylaminopropyltrimethoxysilane, 3-aminoethylaminopropyltriethoxysilane, 3-aminoethylaminoethylaminopropyltrimethoxysilane, 3-aminoethylaminoethylaminopropyltriethoxysilane, 3-aminopropylsilsesquioxane, (n-Butyl)-3-aminopropyltrimethoxysilane, (n-Butyl)-3-aminopropyltriethoxysilane, bis-(3-trimethoxysilylpropyl)amine, N-benzyl-N-aminoethyl-3-aminopropyltrimethoxysilane hydrochloride, N-phenyl-3-aminopropyltrimethoxysilane, N-(2-aminoethyl-3-aminopropyltrimethoxysilane, 3-(triethoxysilylpropyl)-diethylenetriamine, poly(ethyleneimine) trimethoxysilane, and combinations thereof.

12. A print medium as in claim 1, wherein the ink-receiving layer has a total coat weight of 10 g/m² to 40 g/m².

13. A print medium as in claim 1, wherein the polyvinyl alcohol or copolymer of polyvinyl alcohol in the subbing layer is 60% to 99.9% hydrolyzed.

14. A print medium as in claim 1, wherein the polyvinyl alcohol or copolymer of polyvinyl alcohol in the subbing layer is 80% to 99% hydrolyzed.

15. A print medium as in claim 1, wherein the coat weight of the subbing layer is from 0.01 to 2 g/m².

16. A print medium as in claim 1, wherein the polyvinyl alcohol or copolymer of polyvinyl alcohol is selected from the group consisting of polyvinyl alcohol, polyethylene-co-polyvinyl alcohol, cationic polyvinyl alcohol, polyvinyl alcohol with acetoacetyl functional group, polyvinyl alcohol with a silanol functional group, anionic polyvinyl alcohol, polyvinylpyrrolidone-co-polyvinylalchol, polyvinyl alcohol-co-polyethyleneoxide, and combinations thereof.

17. A print medium as in claim 1, wherein the polyvinyl alcohol or copolymer of polyvinyl alcohol is crosslinked with a crosslinking agent.

20. A print medium as in claim 1, wherein the subbing layer has a coat weight of from 0.01 g/m² and 2 g/m².

18. A print medium as in claim 18, wherein the crosslinking agent is selected from boric acid, borate, glutaldehyde, formaldehyde, glyoxal, succinic dialdehyde, methylolmelamine, zinc salts, aluminum salts.

19. A print medium as in claim 18, wherein the crosslinking agent comprises 0.1 wt % to 15 wt % of the polyvinyl alcohol or copolymer of polyvinyl alcohol in the subbing layer.

21. A method of preparing a print medium for ink jetprinting, comprising:

a) coating a subbing layer including polyvinyl alcohol or a copolymer of polyvinyl alcohol on a moisture barrier of a photobase substrate;

b) treating metal oxide or semi-metal oxide particulates with an organosilane reagent and an aluminum complex to form treated particulates; and

c) coating the treated particulates on the subbing layer using a binder of polyvinyl alcohol or copolymer of polyvinyl alcohol, thereby forming an ink-receiving layer.

22. A method as in claim 21, wherein the metal oxide or semi-metal oxide particulates are cationically charged.

23. A method as in claim 21, wherein the aluminum complex is an aluminum chlorohydrate.

24. A method as in claim 21, wherein the step of coating the subbing layer on the moisture barrier is at a coat weight from 0.01 g/m² and 2 g/m².

25. A method as in claim 21, wherein the polyvinyl alcohol or copolymer of polyvinyl alcohol is crosslinked with a crosslinking agent.