Printable recording media

Patent metadata

Field	Value
Publication number	US-9962983-B2
Application number	US-201415119536-A
Country	US
Kind code	B2
Filing date	Mar 31, 2014
Priority date	Mar 31, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A printable recording media containing a substrate; a pre-coat layer including more than about 60 wt % of one or more inorganic pigments by total dry weight of the pre-coat layer; a topcoating layer including more than about 60 wt % of one or more inorganic pigments; up to 25 wt % of binders and up to about 5 wt % of a combination of natural and synthetic rheology modifiers, by total weight of the top-coating layer, wherein the ratio of the amount of natural rheology modifiers to the amount of synthetic rheology modifiers is from about 90:10 to about 50:50. Also disclosed herein is a method for making such printable recording media.

First claim

The invention claimed is:

1. A printable recording media, comprising:
a. a substrate;
b. a pre-coat layer including more than about 60 wt % of one or more inorganic pigments by total dry weight of said pre-coat layer; and
c. a top-coating layer including:
i. more than about 60 wt % of one or more inorganic pigments;
ii. up to 25 wt % of binders;
iii. and up to about 5 wt % of a combination of natural and synthetic rheology modifiers, by total weight of said top-coating layer, wherein the ratio of the amount of natural rheology modifiers to the amount of synthetic rheology modifiers is from about 90:10 to about 50:50.

2. The printable recording media of claim 1 wherein the combination of natural and synthetic rheology modifiers, in the top-coating layer, are present in an amount representing from about 0.1 wt % to 1.5 wt % by total weight of said top-coating layer.

3. The printable recording media of claim 1 wherein, in the top-coating layer, the ratio of the amount of natural rheology modifiers to the amount of synthetic rheology modifiers is from about 85:15 to about 70:30.

4. The printable recording media of claim 1 wherein the natural rheology modifiers, in the top-coating layer, are hydroxy-ethylcelluloses.

5. The printable recording media of claim 1 wherein the synthetic rheology modifiers, in the top-coating layer, are hydrophobically modified alkali soluble emulsion polymer systems.

6. The printable recording media of claim 1 wherein, in the top-coating layer, the natural rheology modifiers are hydroxy-ethylcellulose and the synthetic rheology modifiers are hydrophobically modified alkali soluble emulsion polymer systems.

7. The printable recording media of claim 1 wherein the top-coating layer has a Water Retention Value (WRV) that is below 170 gsm.

8. The printable recording media of claim 1 wherein the top-coating layer has an Hercules high shear viscosity (HHSV) that is below 65 cps.

9. The printable recording media of claim 1 wherein the top-coating layer comprises a mixture of about 30 to about 90 wt % of a first pigment including calcium carbonate particles and of about 10 to about 70 wt % of calcined clay as a second pigment, wherein said weight percentages are by combined weight of the first and second pigments by total dry weight of said top-coating layer.

10. The printable recording media of claim 1 wherein the inorganic pigments, present in the pre-coat layer, are combinations of calcined clay and ground calcium carbonate.

11. The printable recording media of claim 1 wherein the inorganic pigments, present in the pre-coat layer, are combinations of calcined clay and precipitated calcium carbonate.

12. The printable recording media of claim 1 wherein the pre-coat layer further comprises one or more binder in an amount representing from of about 2 wt % to about 25 wt % by total dry weight of the pre-coat layer.

13. The printable recording media of claim 1 wherein the coat-weight of the pre-coat layer, on a side of the printable recording media, is of about 5 to about 20 gsm and the coat-weight of the top-coating layer, on the same side of the printable recording media, is of about 10 to about 30 gsm.

14. An article, comprising:
a. a first layer including inorganic pigments; and
b. a second layer including from about 0.1 wt % to 1.5 wt % of a combination of hydroxy-ethylcellulose and modified alkali soluble emulsion polymer systems, by total weight of said second layer, wherein the ratio of the amount of hydroxy-ethylcellulose to the amount of modified alkali soluble emulsion polymer systems is from about 85:15 to about 70:30.

15. A method for making a printable recording material, comprising:
a. providing a substrate;
b. applying a pre-coat layer including more than about 60 wt % of one or more inorganic pigments by total dry weight of said pre-coat layer on, at least, one side of the substrate;
c. applying, at least, one top-coating layer over said pre-coat layer, that includes more than about 60 wt % of one or more inorganic pigments; up to 25 wt % of binders; and up to about 5 wt % of a combination of natural and synthetic rheology modifiers, by total weight of said top-coating layer, wherein the ratio of the amount of natural rheology modifiers to the amount of synthetic rheology modifiers is from about 90:10 to about 50:50;
d. and drying and calendaring said layers.

Assignees

• Hewlett Packard Development Co

Inventors

• Pal Lokendra
• Swei Jason
• Vaidyanathan Rajasekar
• Courtenay Silke

Classifications

• B41M5/5218

  characterised by inorganic additives, e.g. pigments, clays · CPC title

• B41M5/502

  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 title

• B41M2205/38

  Intermediate layers; Layers between substrate and imaging layer · CPC title

• B41M5/506

  Intermediate layers · CPC title

• B41M2205/34

  Both sides of a layer or material are treated, e.g. coated · CPC title