Ink jet recording medium comprising (a) water expansible colloidal clay (b) silica and (c) water insoluble synthetic binder
AssigneeJames River Corporation of Virginia
InventorsHerbert H. Schubring, Donald R. Spalding, Kenneth A. Pollart
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Abstract
An ink jet printing substrate particularly useful as a coating for paper for multi-color, water base ink jet printing consisting essentially of a high swelling montmorillonite clay, and optionally including a high surface area pigment, such as a synthetic silica or calcium carbonate and a water-insoluble binder.
Claims12
An ink jet recording medium comprising a substrate material consisting essentially of 100 parts by weight of a pigment composed of 70 to 90 parts by weight of a water-expansible colloidal clay of the montmorillonite type and 10 to 30 parts by weight of a finely divided silica having a surface area of at least 250 m.sup.2 /g and an oil absorption value greater than about 175 g/100 g and 5 to 20 parts by weight of a water insoluble synthetic resin binder.
A paper coating composition comprising 100 parts by weight of a pigment composed of 10 to 25 parts by weight fine silica having a surface area of at least 250 m.sup.2 /g, 75 to 90 parts colloidal montomorillonite clay;
- and about 5 to 20 parts water insoluble synthetic resin binder;
- and about 1 part fluorosurfactant .
Ink jet recording paper comprising a paper base sheet surface-coated with 7 to 9 pounds per 3000 square foot ream of a composition comprising 10 to 25 parts by weight finely divided silica having a surface area of at least 250 m.sup.2 /g, 75 to 90 parts water expansible colloidal montmorillonite type clay;
- 5 to 20 parts water-insoluble synthetic resin binder;
- and about 1 part fluorosurfactant.
Dependencies are inferred from the claim text.