Spun nonwoven fabric and apparatus for the manufacture thereof

US6274521A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Detlef Barbier · Waldfischbach-Burgalben, DE
• Engelbert Locher · Kaiserslautern, DE
• Ararad Emirze · Kaiserslautern, DE
• Norbert Goffing · Neunkirchen, DE

Key dates

• Filing date: Mar 7, 2000
• Grant date: Aug 14, 2001
• Expiry date: Mar 7, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/697
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A spun nonwoven fabric contains monofilaments and bicomponent filaments, the spun nonwoven fabric having, over its cross section, different quantities of the bicomponent filaments. The bicomponent filaments contain at least two outward-facing segments made of a binding component. The proportions of bicomponent filaments over the cross sectional planes of the spun nonwoven fabric can be in a range of approximately 1% to 100% by weight. The cross sectional planes of the nonwoven fabric containing the different proportions of bicomponent filaments transition into one another without detectable phase boundaries. The apparatus for manufacturing the nonwoven fabric contains at least one, and may contain up to forty or more, spinneret devices, such as rectangular spinneret plates or round spinneret disks. The spinneret devices may be arranged in rows or in staggered arrangement above a linearly moving collector belt. Spinning orifices on the spinneret devices are respectively dedicated to producing a monofilament or a bicomponent filament from a melt and, viewed in the direction of motion of the collector belt, are arranged with respect to one another so as to correspond in their totality…