Process for the preparation of paper sheets coupled to films...

Details Process for the preparation of paper sheets coupled to films... Process for the preparation of paper sheets coupled to films...

D - Textiles, Paper

21

F

9/69

D21F 11/04 (2006.01)

Patent

CA 1049715

ABSTRACT OF DISCLOSURE Products comprising cellulose paper sheets coupled to films of thermoplastic polymers are prepared by (a) forming a panel comprising at least two superimposed fibrous layers, one layer consisting, at least predominantly, of cellulose fibers and the other consisting, at least predominant- ly, of fibrils or microfibers of synthetic thermoplastic poly- mers, by successive stratification of pulp or aqueous dis- persions of said fibers and fibrils; (b) reducing the water content of the panel, by suction and/or compression, until it is between 30% and 80% by weight; (c) drying the panel to a moisture content of less than 0.5% by weight; and (d) heating the panel under pressure at a temperature higher than the softening temperature of the synthetic thermoplastic polymer.

222966

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