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:
Aug. 06, 2013
Filed:
Nov. 19, 2007
Hanneke Boerstoel, Arnhem, NL;
Johannes Bos, Apeldoorn, NL;
Adriaan Anton Schaap, Oosterbeek, NL;
Dennis Wilbers, Iwakuni, JP;
Leonardus Antonius Godfried Busscher, Duiven, NL;
Antonius Henricus Maria Schotman, Huissen, NL;
Kurt Rainer Hans-heinrich Stolze, Leichlingen, DE;
Hanneke Boerstoel, Arnhem, NL;
Johannes Bos, Apeldoorn, NL;
Adriaan Anton Schaap, Oosterbeek, NL;
Dennis Wilbers, Iwakuni, JP;
Leonardus Antonius Godfried Busscher, Duiven, NL;
Antonius Henricus Maria Schotman, Huissen, NL;
Kurt Rainer Hans-Heinrich Stolze, Leichlingen, DE;
Teijin Aramid B.V., Arnhem, NL;
Abstract
The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex.