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:
Oct. 28, 2014
Filed:
Feb. 12, 2010
Leonardus A. G. Busscher, Duiven, NL;
Jacobus Johannes Meerman, Arnhem, NL;
Ronald Eduard Hoogerwerf, Arnhem, NL;
Alexander L. L. Broekhof, Arnhem, NL;
Leonardus A. G. Busscher, Duiven, NL;
Jacobus Johannes Meerman, Arnhem, NL;
Ronald Eduard Hoogerwerf, Arnhem, NL;
Alexander L. L. Broekhof, Arnhem, NL;
Teijin Aramid B.V., Arnhem, NL;
Abstract
A method for producing a filament yarn from a para-aromatic polyamide, having an optically anisotropic aramid spinning solution filtered within a spinneret arrangement by using a filter having passage openings and extruded within the spinneret arrangement through a plurality of spinning orifices. The extruded anisotropic aramid spinning solution is guided via an air gap, stretched in the process, and collected in an aqueous coagulation bath. The optically anisotropic aramid spinning solution in the spinneret arrangement is fed to the spinning orifices via a flow resistor. The flow resistor is arranged closer to the spinning orifices than the filter, and the flow resistor and the filter are arranged at a distance to one another. The method may also include a para-aromatic polyamide filament yarn.