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. 13, 2011
Filed:
Jul. 01, 2006
Applicants:
Stephanus Willemsen, Rheden, NL;
Hendrik Berend Olde, Emmen, NL;
Inventors:
Stephanus Willemsen, Rheden, NL;
Hendrik Berend Olde, Emmen, NL;
Assignee:
Teijin Aramid B.V., Arnhem, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 67/00 (2006.01); B29B 9/14 (2006.01); D01F 11/08 (2006.01); D06M 15/564 (2006.01); D06M 15/507 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention pertains to a method for improving filament cohesiveness of chopped aramid fiber including the steps of impregnating a film-forming binding agent into the fiber, drying the fiber, optionally applying a finish to the fiber, and chopping the fiber to pieces of 1 to 16 mm length, characterized in that the fiber prior to applying the binding agent is subjected to a twisting process to obtain a fiber having a twisting level of 10 to 150 tpm and that the chopping of the fiber is performed in a rotary chopper.