Patent ID: 6620469
Filing Date: 2003-09-16
Classification: B41M,Y10T

Abstract:
An ink jet recording sheet capable of being recorded with aqueous ink images comprisinga substrate comprising a polymeric film; an ink receiving layer comprising a pigment and a polymeric binder; and a water-repellent undercoat layer formed between the substrate and the ink receiving layer and bonding the substrate and ink receiving layers to each other, the undercoat layer comprising (1) a polymeric binder comprising at least one water-insoluble resin selected from the group consisting of conjugated diene polymers and copolymers, acrylic homopolymers and copolymers, vinyl polymers and copolymers; and modification reaction products of the above-mentioned polymers and copolymers, having modification functional groups, and (2) pigment particles of at least one member selected from the group consisting of calcium carbonate and magnesium silicate, and the water-insoluble resin for the polymeric binder (1) having a glass transition temperature of from âˆ’45Â° C. to 50Â° C., and the undercoat layer exhibiting a water repellency of R6 or more determined in accordance with Japanese Industrial Standard P 8137, and being present in an amount of 0.2 to 15.0 g/m2, whereby the interfaces between the undercoat layer and the ink receiving layer and between the substrate and the undercoat layer respectively are resistive to water penetration therethrough and thus the ink receiving layer is firmly bonded to the substrate through the undercoat layer.