Coated paper stocks for use in electrostatic imaging...

G - Physics – 03 – G

Patent

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G03G 7/00 (2006.01)

Patent

CA 2247248

Coated paper stocks for electrostatic imaging comprising a substrate (2) coated on at least one surface with a resin layer comprised of olefinic material (4) and a pin-hole free, continuous coating layer (6) over said resin layer. The continuous layer has a glass transition temperature above 100 ~C and is comprised of one or more natural or synthetic film-forming polymers. As a single layer this continuous coating layer functions as both a heat protective and imaging layer. In an alternative embodiment two separate coating layers are provided with separate heat protective and imaging functionalities.

La présente invention, qui concerne du papier couché convenant aux procédés de production d'images par procédé électrostatique, est constituée, d'une part d'un substrat (2) dont au moins une face est revêtue d'une couche de résine à base de matériau de la classe des oléfines (4), et d'autre part d'un film de couchage continu (6) exempt de trou d'épingle recouvrant ladite couche. Le film de couchage continu, qui présente une température de transition vitreuse supérieure à 100 ·C, est constitué d'au moins un polymère naturel ou synthétique se formant en film. Lorsqu'il ne fait qu'une seule couche, ce film de couchage continu remplit les fonctions de protection thermique et de production d'image. Selon une autre réalisation, on dispose de deux couches de revêtement séparées remplissant des fonctions distinctes de protection thermique et de production d'image.

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