Carl Freudenberg Kg

Fiberweb Holdings Limited

Ralph Berkemann

Klaus Veeser

Holger Schilling

Armin Greiner

Guenter Frey

Patrick Lauffenburger

Günter Frey

The invention provides a nonwoven electret web comprising fibers made from a thermoplastic polymer material which comprises a polymer, a first additive (a) and a second additive (b), wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises a metal salt of a carboxylic acid and/or an organic amide derived from a carboxylic acid and an amine. The invention further provides a process for making the nonwoven electret web, a fiber, a process for making the fiber, a multi-layer sheet, and the use of the nonwoven electret web, the fiber or the multilayered sheet as a filter material or as a dust-removing fabric for cleaning purposes.

Nonwoven web and fibers with electret properties, manufacturing processes thereof and their use

The invention relates to a thermally bound non-woven material containing a low-shrinkage dual-component core-sheath fiber consisting of a crystalline polyester core and a crystalline polyester sheath which has a melting point at least 10&#xb0; C. lower than the core, the heat-shrinkage characteristic of said fiber being less than 10% at 170&#xb0; C.

Thermally bound non-woven material

Growing community of inventors

Moerlenbach, Germany

Ralph Berkemann