Patent · US Expired

Apparatus for the preparation of bonding fibers from polymer dispersions

US4534720A · kind A · utility

0Cited by

1References

3Claims

0Family size

Assignee

BASF SE

Inventors

Richard Bung · Ludwigshafen, DE
Karl Gans · Ludwigshafen, DE
Gerold Schreyer · Ludwigshafen, DE
Gerhard Welzel · Mannheim, DE

Key dates

Filing date	Jul 20, 1982
Grant date	Aug 13, 1985
Priority date	—
Expiry date	Jul 20, 2002

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01D5/40
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An apparatus for the preparation of bonding fibers, especially for the production of nonwovens by a wet-lay process, wherein a polymer dispersion, containing an anionic or nonionic dispersant, and an aqueous solution, containing a dissolved cationic precipitant, are combined to cause fiber formation from precipitated polymer particles, which apparatus includes a feed funnel spaced above the bottom of a homogenization vessel with both a nozzle for introducing the polymer dispersion and a metering device for the precipitant, which are so arranged and aimed into the funnel that in co-operation with a stirrer a vortex is produced in a column of liquid in the feed funnel, and fibers are formed and broken up while passing through a turbulence chamber, located at the bottom of the funnel, and a gap into a homogenization chamber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.