USE OF A FINE AQUEOUS POLYMER DIPERSION FOR THE IMPREGNATION OF NATURAL FIBRES

摘要

The use of an aqueous polymer dispersion including at least one amorphous polymer having a Tg varying between 55° C. and 175° C. or a semi-crystalline polymer having a melting point varying between 70° C. and less than 220° C., the weight concentration of the polymer in the dispersion varying between 5 and 50%, with the polymer particles having an average size of less than 10000 nm, as a binder for impregnating strands or strips of natural fibres, in particular flax fibres, with said polymer being incorporated in the core of the fibre bundle forming the strand or strip and thereby binding the fibres together.

主权项

1. The use of an aqueous polymer dispersion comprising at least one amorphous or semi-crystalline polymer, as binder for impregnating rovings or ribbons of natural fibers, wherein said polymer:
is incorporated into the core of the bundle of fibers making up said roving or sad ribbon and thus binding said fibers to one another, if it is amorphous, has a Tg ranging from 50° C. to 175° C., is present in said dispersion in a content by weight ranging from 5% to 50% with particles in dispersion having a number-average size of less than 10000 nm, and is chosen from copolyamides, polyesters, polyurethanes, poly(meth)acrylates including copolymers, polyolefins or fluorinated polymers including fluorinated copolymers.