Making spunbond from continuous filaments

US11365498B2 · kind B2 · utility

Assignee

• REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE

Inventors

• Michael Nitschke · Rübhausen, DE
• Martin Neuenhofer · Rösrath, DE
• Detlef Frey · Niederkassel, DE
• Christine Noack · Cologne, DE

Key dates

• Filing date: Jun 3, 2021
• Grant date: Jun 21, 2022
• Expiry date: Jun 3, 2041

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01D5/0985
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Spunbonded nonwoven is made from continuous thermoplastic filaments emitted downwardly by a spinneret in a filament direction. A cooling chamber directly beneath the spinneret receives the filaments from the spinneret and cools the spun filaments with cooling air and has relative to a longitudinally extending machine direction a pair of longitudinal sides extending parallel to the machine direction and a pair of transverse sides extending substantially perpendicular to the machine direction between the longitudinal sides. Respective air-supply manifolds on the transverse sides feed cooling air therefrom into the cooling chamber. The cooling air is extracted from the cooling chamber at the longitudinal sides. A stretcher directly beneath the cooling chamber receives and elongates the cooled filaments, and a device deposits the stretched filaments as a band and conveys the band off in the machine direction.