The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2024
Filed:
Dec. 11, 2020
Lenzing Aktiengesellschaft, Lenzing, AT;
Ibrahim Sagerer-Foric, Vöcklabruck, AT;
Lenzing Aktiengesellschaft, Lenzing, AT;
Abstract
The invention relates to a process for the production of spunbonded nonwoven and a device for the production of spunbonded nonwoven, wherein, in the process, a spinning mass is extruded through a plurality of nozzle holes to form filaments, the filaments are drawn in the extrusion direction, precipitated at least partially by being subjected to a coagulation air stream comprising a coagulation liquid and deposited to form the spunbonded nonwoven. To establish a process which permits a cost-efficient and simple adjustment of the air permeability of the spunbonded nonwoven, it is suggested that the air permeability of the spunbonded nonwoven is adjusted on the basis of at least one parameter of the coagulation air stream in that the actual air permeability of the spunbonded nonwoven is measured, the difference between the actual air permeability and a predefined target air permeability is determined and the at least one parameter of the coagulation air stream is changed as a function of the determined difference.