Apparatus for making a spunbond nonwoven

US10385491B2 · kind B2 · utility

Assignee

• REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE

Inventors

• Michael Nitschke · Rübhausen, DE
• Martin Swiatek · Rheinbach, DE
• Martin Neuenhofer · Rösrath, DE
• Hans-Georg Geus · Niederkassel, DE
• Detlef Frey · Niederkassel, DE

Key dates

• Filing date: Jan 25, 2017
• Grant date: Aug 20, 2019
• Expiry date: Nov 16, 2037

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D04H3/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An apparatus for making a spunbond nonwoven from monofilaments of thermoplastic synthetics has a spinneret for spinning and emitting the filaments in a travel direction, a cooler downstream of the spinneret for cooling the spun filaments, and a stretcher downstream of the cooler for stretching the filaments. An intermediate passage extending in the travel direction between the cooler and the stretcher has upstream and downstream converging passage sections. The upstream passage section in the travel direction of the filaments having a shorter length than the downstream passage section in the travel direction of the filaments. A ratio BE/BA of an inlet width BE to an outlet width BA of the upstream passage section is 1.5 to 5.5. A ratio of an inlet width bE, to an outlet width bA, of the downstream passage section is 1 to 4.