Kraft-substitute bristol paper products

Details Kraft-substitute bristol paper products Kraft-substitute bristol paper products

D - Textiles, Paper

21

H

D21H 11/10 (2006.01)

Patent

CA 2212865

The present invention provides a kraft-substitute bristol paper product, comprising from 70 to 95 per cent mechanical pulp fibres and from 5 to 30 per cent chemical pulp fibres. The paper product has a caliper of from 0.006 to 0.020 inches and weighs from 20 to 30 per cent less than the corresponding conventional kraft paper product of equivalent caliper. In an embodiment a novel file folder is provided. The invention further provides a process for preparing a kraft-substitute bristol paper sheet having a density in the range of 0.5 to 0.75 g/cm3 and a tear strength of from 700 to 2300 mN.

La présente invention concerne un produit de papier bristol de substitution pour le kraft, comprenant de 70 à 95 % de fibres de pâte mécanique et de 5 à 30 % de fibres de pâte chimique. Le produit de papier a une épaisseur allant de 0,006 à 0,020 pouce et son poids est inférieur de 20 à 30 % à celui du papier kraft classique correspondant d'épaisseur équivalente. L'un des modes de réalisation porte sur une nouvelle chemise pour documents. L'invention concerne en outre un procédé de préparation d'une feuille de papier bristol remplaçant le kraft, d'un grammage compris entre 0,5 et 0,75 g/cm?3¿ et dont la résistance à la déchirure est comprise entre 700 et 2300 mN.

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