Conditioning of polyolefinic fibers for use in the manufacture of synthetic paper
AssigneeMontedison Fibre S.p.A.
InventorsLuciano Baldi, Emilio Martini
Life of this patent
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Abstract
Polyolefinic fibers for use in the manufacture of synthetic paper are rendered readily water-dispersible by pre-treatment with a hydrophilic polymer which is a condensate of polyvinyl alcohol and aliphatic aldehydes containing from 1 to 6 carbon atoms, which condensates contain from 2 to 8 aldehyde residues per 100 units of polyvinyl alcohol.
Claims7
In the process of rendering polyolefin fibers having a surface area greater than 1 m.sup.2 /g dispersible in water which comprises treating said polyolefin fibers with an aqueous solution of a hydrophilic polymer, the improvement characterized in that the hydrophilic polymer is a condensation product of polyvinyl alcohol with an aliphatic aldehyde having from 1 to 6 carbon atoms which condensation product contains, in the macromolecule, from 2 to 8 aldehyde residues per 100 vinyl monomeric units.
Polyolefin fibers having a surface area greater than 1 m.sup.2 /g and, having fixed thereon a hydrophilic polymer which renders the fibers readily dispersible in water, by treating said fibers with an aqueous solution of said hydrophilic polymer which is a condensation product of polyvinyl alcohol and an aliphatic aldehyde containing from 1 to 6 carbon atoms, said condensate containing, in the macromolecule, from 2 to 8 aldehyde residues per 100 vinyl monomeric units.
Dependencies are inferred from the claim text.