a smooth, kuituisen, flexible, good tearing sustainable substrate production method and obtained from a substrate

摘要

Manufacture of a planar, fibrous, flexible substrate which is difficult to tear. The process consists in: - preparing by fibrillation natural cellulosic fibres until they have been given a Schopper-Riegler drainability higher than 60 DEG , - mixing into water a charge of cellulose fibres thus beaten and at least 30% by weight of artificial fibres, - diluting the mixture obtained, - and producing a substrate sheet using a paper making machine fed with the mixture. - Application to the manufacture of envelopes and bags.