A heat-sensitive stencil sheet and a manufacturing method...

Details A heat-sensitive stencil sheet and a manufacturing method... A heat-sensitive stencil sheet and a manufacturing method...

B - Operations, Transporting

41

N

B41N 1/24 (2006.01) B32B 31/14 (1995.01)

Patent

CA 2204800

A heat-sensitive stencil sheet comprises a fibrous support of polyester fibers, and a polyester film, wherein both the orientation parameter (R1) of the film and the orientation parameter (R2) of the fibers respectively obtained by laser Raman spectrometry are in a range from 3 to 10. A method for manufacturing such a heat-sensitive stencil sheet comprises thermally bonding an undrawn polyester film and a fibrous support of undrawn polyester fibers to form a laminate and then stretching the laminate, wherein, during the bonding or during the stretching, the film and the fibrous support of the laminate are heated at different temperatures, respectively.

Un stencil thermosensible comprend un support fibreux de fibres de polyester et une pellicule de polyester, dans lesquels les paramètres d'orientation respectifs de la pellicule (R1) et des fibres (R2) obtenus par spectrométrie Raman laser se situent dans une étendue variant entre 3 et 10. Une méthode de fabrication d'un tel stencil thermosensible comprend le thermoliage de la pellicule de polyester non étirée et du support fibreux de fibres de polyester non étirées pour former un stratifié, puis l'étirement du stratifié dans lequel, pendant le liage ou l'étirage, la pellicule et le support fibreux du stratifié sont chauffés à des températures respectives différentes.

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