Polyvinylalkoholfasern und Schmelzgeblasene Faserprodukte

Details

Veröffentlichungs-Nr.

EP4321667

Aktenzeichen

EP23191163

Anmeldetag

11. August 2023

Veröffentlichung

18. Februar 2026

Erteilung

18. Februar 2026

Rechtsraum

EP

IPC

D04H1/56D01D5/08D01F1/10D01F6/14D04H3/007D04H3/16D01D5/098

Abstract

A method of manufacture of a nonwoven product comprising polyvinyl alcohol fibres, the method comprises the steps of: providing a polyvinyl alcohol composition comprising homopolymeric polyvinyl alcohol having a degree of hydrolysis of 88% to 98% or greater; and a weight average molecular weight in the range from 14,000 to 22,000; a plasticiser selected from the group consisting of: diglycerol, triglycerol, fructose, ribose, xylose, D-mannitol, triacetin, pentaerythritol, dipentaerythritol, methyl pentanediol, 1,2-propanediol, 1,4-butanediol, 2-hydroxy-1,3-propanediol, 3-methyl-1,3-butanediol, 3,3-dimethyl-1,2-butanediol, polyethylene glycol 300, polyethylene glycol 400, alkoxylated polyethylene glycol, caprolactam, tricyclic trimethylolpropane formal, rosin esters, erucamide, and mixtures thereof; and an optional stabilizer selected from the group consisting of: sodium stearate, potassium oleate, sodium benzoate, calcium stearate, stearic acid, dimethyl pentane diol, propionic acid and mixtures thereof; melting the composition at a temperature from 200°C to 230°C to form a molten polymer; wherein the molten polymer is meltblown by the steps of: extrusion of the molten polymer through a die having a spinneret to form molten fibres of the polymer; the fibres being blown from the die and attenuated by a flow of heated air to form attenuated molten fibres, the attenuated fibres being deposited on a moving collector and allowed to solidify to form a melt blown nonwoven fibre web.

Anmelder

Firma

Aquapak IP Limited

Land

🇬🇧 Großbritannien

Fachgebiete