Wetlaid nonwovens on high speed machines

摘要

A method for the production of a fibrous web having textile length fibers wherein a fiber furnish is formed by dispersion of the fibers in an unfoamed carrier medium of water and an associative thickener of ethylene oxide base urethane block copolymers or hydroxyethylcellulose ethers having a C10 to C24 alkyl side chain in an amount within the range of from about 1 to about 150 pounds of thickener per ton of dry fiber and including an anionic viscosity modifier in the range of 10 to 500 ppm. The furnish having a consistency in the range of 0.05 to 0.2 weight percent fibers is supplied to a high speed papermaking machine for forming a fibrous web. The textile length fibers may be polyester fibers being 1.5 denier and 3/4 inches. The high speed papermaking machine may be a twin-wire papermaking machine or a suction breast roll papermaking machine or a crescent former papermaking machine.