HYBRID MEDIA SHEETS

• US 20170050457A1
• Filed: 03/19/2014
• Published: 02/23/2017
• Est. Priority Date: 03/19/2014
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Yu, Haowen, Cromer, Bruce L., Fu, Xulong, Selensky, Ronald J.
• Granted Patent: US 10,639,923 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B41M 2205/34 Both sides of a layer or material are treated, e.g. coated
• 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 5/50 Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording printing on organic plastics using a printer's form B41M1/30; printing on pre-treated paper with a printer's form B41M1/36
• CPC Class Codes: B41M 5/502 characterised by structural details, e.g. multilayer materials supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42
• CPC Class Codes: B41M 5/504 Backcoats
• CPC Class Codes: B41M 5/506 Intermediate layers
• CPC Class Codes: B41M 5/508 Supports
• 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 5/5245 characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
• 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
• CPC Class Codes: C04B 41/0018 Coating or impregnating "in situ", e.g. impregnating of artificial stone by subsequent melting of a compound added to the artificial stone composition

Abstract

The present disclosure is drawn to hybrid media sheets, ink-receiving layer compositions for coating on a media substrate, and a method of making hybrid media sheets. The hybrid media sheet scan have a media substrate with a front barrier layer, a back barrier layer, an adhesion promoting layer applied to the front barrier layer, and an ink-receiving layer applied to the adhesion promoting layer. The ink-receiving layer can include a water-soluble polymer, a mordant, and particles of a metal- or semimetal-oxide.

Claims

1. A hybrid media sheet, comprising:

a media substrate;

a front barrier layer comprising a first polyolefin applied to a front side of the media substrate;

a back barrier layer comprising a second polyolefin applied to a back side of the media substrate;

an adhesion promoting subbing layer applied to the front barrier layer; and

an ink-receiving layer comprising a water-soluble polymer, a mordant, and particles of a metal- or semimetal-oxide applied to the adhesion promoting subbing layer.

2. The hybrid media sheet of claim 1, wherein the front barrier layer and the back barrier layer has a thickness ratio from about 1:

1.5 to about 1;

3.

3. The hybrid media sheet of claim 1, wherein the front barrier layer has a weight from about 12 g/m² to about 30 g/m² and the back barrier layer has a weight from about 20 g/m² to about 40 g/m², with the proviso that the front barrier layer is thinner than the back barrier layer.

4. The hybrid media sheet of claim 1, wherein the back barrier layer comprises low density polyethylene and an amount of high density polyethylene at from 20% to 70% by weight, and the front barrier layer comprises low density polyethylene and either no high density polyethylene or an amount of high density polyethylene that is less than the amount in the back barrier layer.

5. The hybrid media sheet of claim 1, wherein the adhesion promoting subbing layer includes a polyvinyl alcohol and from about 0.1% to about 10% by weight of a cross-linking agent.

6. The hybrid media sheet of claim 1, wherein the particles of the metal- or semimetal-oxide are present at a particles to water-soluble polymer ratio of about 1:

1 to about 1;

10 by weight.

7. The hybrid media sheet of claim 1, wherein the particles of the metal- or semimetal-oxide are calcium carbonate, synthetic non-crystalline silica, colloidal silica, alumina, colloidal alumina, pseudo boehmite, aluminum hydroxide, or a combination thereof.

9. The hybrid media sheet of claim 1, wherein the mordant is a cationic polymer, a metal salt, or a combination thereof.

8. The hybrid media sheet of claim 8, wherein the particles of the metal- or semimetal-oxide are colloidal alumina, cationic superfine colloidal silica, or a combination thereof.

10. The hybrid media sheet of claim, wherein the media substrate comprises raw base paper and has a surface roughness of less than 4 μ

m.

11. An ink-receiving layer composition for coating a hybrid media sheet, comprising:

from 50% to 95% by weight of a polyvinyl alcohol;

from 5% to 50% by weight of particles of a metal- or semimetal-oxide; and

a mordant selected from a cationic polymer, a metal salt, aluminum chlorohydrate, or combinations thereof.

12. The ink-receiving layer composition of claim 11, wherein a ratio of the mordant to the polyvinyl alcohol is from about 1:

5 to about 1;

25 by weight.

13. The ink-receiving layer composition of claim 11, wherein the polyvinyl alcohol is a mixture of polyvinyl alcohol compounds each having from 60% to 99% hydrolysis.

14. A method of making a hybrid media sheet, comprising:

coating a back side of a media substrate with a back barrier layer comprising a first polyolefin and a front side of the media substrate with a front barrier layer comprising a second polyolefin, wherein a thickness ratio of the front barrier layer to the back barrier layer is from 1;

1.5 to 1;

3;

coating an adhesion promoting subbing layer onto the front barrier layer, the adhesion promoting subbing layer comprising polyvinyl alcohol; and

coating an ink-receiving layer onto the adhesion promoting subbing layer, the ink-receiving layer comprising a polyvinyl alcohol, a mordant, and particles of a metal- or semimetal-oxide.

15. The method of claim 14, wherein the adhesion promoting subbing layer and ink-receiving layer are coated at a thickness such that a combined thickness of the front barrier layer, adhesion promoting subbing layer, and ink-receiving layer is about equal to a thickness of the back barrier layer.