Water polyester coated imaging element

Abstract

The invention relates to an imaging member comprising at least one image layer and a base, said base comprising a cellulose paper that has its surfaces impregnated with water dispersible ester-based condensation polymer wherein the surface of said base has a roughness of less than 2.03 mum Ra and a hydrophobicity as measured by 40 / 20 Acid Valley test in excess of 500 seconds.

Description

field of invention [0001] This invention relates to imaging supports and media. In preferred forms, it relates to base materials for inkjet, thermal and photosensitive photographic papers. Background of the invention [0002] Imaging bases, especially photoimaging bases, need to be resistant to liquid penetration to prevent positive drying and positive transport problems during photofinishing, and later positive quality problems such as yellow fringing. The use of "sizing" to impart a degree of liquid repellency in paper is well known in the art. Size chemicals are generally added to the papermaking fibers prior to sheet formation (internal sizing) or to the surface of the sheet that has been, at least partially, dried (surface sizing). In the past, "sized" cellulose paper bases alone have not provided sufficient liquid repellency, thus limiting their usefulness or requiring additional processing steps. For example, fibrous base papers without a special waterproofing laye...

AI Technical Summary

Problems solved by technology

Coating on both sides of the paper requires multiple passes, making this method unsatisfactory because water must be removed from the back of the paper during hardening on the side that will eventually receive the photosensitive layer