Patent · US Active

Manufacture of spunbonded nonwovens from continuous filaments

US11697897B2 · kind B2 · utility

0Cited by

7References

16Claims

0Family size

Assignee

REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE

Inventors

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

Key dates

Filing date	Mar 15, 2022
Grant date	Jul 11, 2023
Priority date	—
Expiry date	Mar 15, 2042

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD04H3/077
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A spunbonded nonwovens is made by first spinning thermoplastic continuous filaments and emitting them from a spinneret in a direction and then passing the filaments in the direction through a cooling chamber. Meanwhile cooling air is fed from respective manifolds flanking the chamber into the chamber to cool the filaments and the cooling air is guided into the manifolds through respective manifolds and through respective planar homogenizing elements each having a plurality of openings forming a free open surface area constituting 1 to 40% of the total surface area of the respective planar homogenizing element. The cooling air passes from the planar homogenizing element into the cooling chamber through a flow straightener.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.