Wacker-Chemie Gmbh

Wacker Chemie Ag

Holger Poths

Konrad Alfons Wierer

Heimo Woelfle

Richard Goetze

Florian Bauers

Heimo Wölfle

Frank Rindfleisch

Pia Beate Deindörfer

Textile nonwovens are produced without formaldehyde by employing a polymer binder which is a copolymer of vinyl acetate, ethylene, (meth)acrylamide, (meth)acrylic acid and maleic acid or anhydride or maleamic acid.

Formaldehyde-free binder composition

Disclosed is a process for producing fiber webs by the airlaid process of laying down the fibers and the pulverulent binder in an air stream, which includes a first step of laying a fiber web or fibers up to a basis weight of 10 to 50 g/m , a subsequent step of laying down fibers and a thermoplastic polymer powder based on polymers of one or more monomers such as a vinyl ester or a (meth)acrylic ester separately or as a mixture in the air stream in an amount of 10 to 300 g/m and, if appropriate, repeating this step until the desired basis weight is obtained, and consolidating the fiber material at temperatures of 80&deg; C. to 260&deg; C. and, if appropriate, at a pressure of up to 100 bar.

Production of fiber webs by the airlaid process

Growing community of inventors

Burghausen, Germany

Holger Poths