Glossy inkjet coated paper
OwnerSanjay A. Monieinventor
Life of this patent
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Abstract
The inkjet recording sheet of the present invention comprises a cellulosic support, e.g., paper, having applied to at least one surface thereof one or more base coats, to provide a high absorption capacity for the applied inks, and an ink receptive top coat applied over the base coat(s) that is capable of being finished to a high gloss, comparable to a cast coated sheet, without sealing the surface.
Claims8
A process for producing a glossy inkjet recording sheet which comprises:
- (a) applying onto at least one surface of a paper substrate a first base coating consisting essentially of pigment and binder;
- (b) applying over said first base coating an ink receptive coating consisting essentially of pigment and binder;
- and,
- (c) finishing the coated surface to achieve a 60 degree gloss of at least about 60 as measured by the ASTM Method D523 and a Distinctness of Image (DOI) of at least about 30.
A process for producing a glossy inkjet recording sheet comprising:
- (a) selecting as a substrate an alkaline paper having a basis weight in the range of 100-150 g/m2 and a caliper of at least about 5.0 mil;
- (b) applying to at least one surface of the substrate of step (a) a first base coating comprising essentially precipitated calcium carbonate and calcined clay dispersed in a binder at a concentration of about 10-15% binder;
- (c) applying over the base coating of step (b) an ink receptive top coating comprising essentially fumed alumina having a primary particle size on the order of about 13 nanometers and a specific surface area less than about 75 m2/g dispersed in a binder at a concentration of about 5-10% binder;
- and,
- (d) finishing the coated substrate of step (c) in a calender device at a moisture content of from about 6-8%, a nip load of from about 600-800 pli, with a hot roll temperature of from about 100-200 degrees F., one-to-six nips to achieve a finished surface having a 60° gloss of at least about 60 according to ASTM Method D523 and a Distinctness of Image (DOI) measurement of at least about 30.
A glossy inkjet recording sheet comprising as the substrate, paper, having applied to at least one surface thereof a first base coating comprising essentially precipitated calcium carbonate and calcined clay dispersed in binder at a concentration of about 10-15% binder, and an ink receptive top coating applied over said base coating comprising essentially fumed alumina having a primary particle size on the order of about 13 nanometers and a specific surface area less than about 75 m2/g dispersed in a binder at a concentration of about 5-10% binder, wherein the finished coated surface of said recording sheet has a 60° gloss of at least about 60 according to ASTM Method D523 and Distinctness of Image (DOI) measurement of at least about 30.
Dependencies are inferred from the claim text.