Cast coated sheet and method of manufacture
AssigneeS.D. Warren Services Company
InventorPaul G. Gilbert
Life of this patent
Estimating the term…
Abstract
A cast coated printing sheet providing high paper gloss and smoothness, desirable printing performance characteristics, and enhanced printed product attributes. The cast coated sheet comprises a substrate and a brushed coating layer comprising (a) a pigment, (b) a functionally effective amount of latex such that a dried unbrushed layer of the coating will not adhere sufficiently to the casting surface to allow the unbrushed layer to be cast, and (c) a functionally effective amount of brushing agent such that damage to the coating layer surface during brushing is minimized. The invention further provides methods for manufacturing such cast coated printing sheets.
Claims15
A method of forming a cast coated printing sheet comprising:
- a) providing a substrate having, on a least a first surface of the substrate, a dried coating layer that, when plasterized, will not adhere to a casting surface sufficiently to allow the plasticized coating layer to be cast;
- b) brushing an exposed surface of the dried coating layer to a sufficient extent so that the coating layer, when plasticized, will adhere to the casting surface sufficiently to be cast;
- c) plasticizing the brushed exposed surface;
- and
- d) casting the plasticized exposed surface.
A method or forming a cast coated printing sheet comprising:
- a) providing a substrate having, on a least a first surface of the substrate, a dried coating layer that, when plasticized, will not adhere to a casting surface sufficiently to allow the plasticized, coating layer to be cast;
- b) brushing an exposed surface at the dried coating layer, wherein the net specific brushing intensity applied to the exposed surface is about 0.002 to 0.1 kW hr/m2;
- c) plasticizing the brushed exposed surface;
- and
- d) casting the plasticized exposed surface.
A method of forming a cast coated printing sheet comprising:
- a) providing a substrate having, on a least a first surface of the substrate, a dried coating layer that, when plasticized, will not adhere to a casting surface sufficiently to allow the plasticized coating layer to be cast;
- b) brushing an exposed surface of the dried coating layer to a sufficient extent so that the coating layer, when plasticized, will adhere to the casting surface sufficiently to be cast;
- c) plasticizing the brushed exposed surface;
- and
- d) casting the plasticized exposed surface, wherein the cast coated printing sheet has a 20° ink gloss of greater than 60.
A method of fanning a cast coated priming sheet comprising:
- a) providing a substrate having, on a least a first surface of the substrate, a dried coating layer that, when plasticized, will nor adhere to a casting surface sufficiently to allow the plasticized coating layer to be cast;
- b) brushing an exposed surface of the dried costing layer to a sufficient extent so that the coating layer, when plasticized will adhere to the casting surface sufficiently to be cast;
- c) plasticizing the brushed exposed surface;
- and
- d) casting the plasticized exposed surface,
- wherein the cast coated comprising sheet has a PPS 10 kg Soft of less than 0.50.
A method of forming a cast coated printing sheet comprising:
- a) providing a substrate having, on a least a first surface of the substrate, a dried coating layer that, when plasticized, will not adhere to a casting surface sufficiently to allow the plasticized coating layer to be cast;
- b) brushing an exposed surface of the dried coating layer to a sufficient extent so that the coating layer, when plasticized, will adhere to the casting surface sufficiently to be cast;
- c) plasticizing the brushed exposed surface;
- and
- d) casting the plasticized exposed surface,
- wherein the cast coated printing sheet has a 20° gloss of greater than 90.
Dependencies are inferred from the claim text.