Highly functional spunbonded fabric made from particle-containing fibres and method for producing same

US10501876B2 · kind B2 · utility

Assignee

• THUERINGISCHES INSTITUTE FUER TEXTILE- UND KUNSTOSTOFF-FORSCHUNG E.V. · DE

Inventors

• Yvonne Ewert · Rudolstadt, DE
• Frank-Günter Niemz · Rudolstadt, DE
• Marcus Krieg · Weimar, DE
• Bernd Riedel · Hagneck, CH

Key dates

• Filing date: Jul 3, 2018
• Grant date: Dec 10, 2019
• Expiry date: Jul 3, 2038

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F11/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Functional spunlaid fabrics incorporating fibers made from non-meltable polymers containing permanently one or more functional additives are provided. The fibers are entangled and interlocked to form a firm nonwoven composite, have different lengths, and aspect ratios above 1,000. The fibers have a mean diameter of 0.1 to 500 micrometres and diameter variations within a single fiber and among each other of at least 30%. The fibers contain more than 40 wt % of finely distributed functional additives in solid and/or liquid form. The spunlaid fabric is produced from a spinning solution containing the non-meltable polymer dissolved in a direct solvent and at least one functional additive. The spinning solution is extruded out of a spinneret, and the resulting strands are drawn in the longitudinal direction to form fibers, stabilized and laid down to form a nonwoven fabric with permanent functional properties. Exemplary spunlaid fabrics include clothing, technical textiles and filters.