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:
Feb. 15, 2011
Filed:
Nov. 13, 2009
Markus J. H. Bulters, Sittard, NL;
Gerrit Rekers, Born, NL;
Philippe W. P. V. Bleiman, Zonhoven, BE;
Jozef M. H. Linsen, Heerlen, NL;
Alexander A. M. Stroeks, Valkenburg a.d. Geul, NL;
Johannes A. Van Eekelen, Rozenburg, NL;
Adrianus G. M. Abel, Capelle aan de ljssel, NL;
Marko Dorschu, Beek, NL;
Paulus A. M. Steeman, Geleen, NL;
Markus J. H. Bulters, Sittard, NL;
Gerrit Rekers, Born, NL;
Philippe W. P. V. Bleiman, Zonhoven, BE;
Jozef M. H. Linsen, Heerlen, NL;
Alexander A. M. Stroeks, Valkenburg a.d. Geul, NL;
Johannes A. Van Eekelen, Rozenburg, NL;
Adrianus G. M. Abel, Capelle aan de ljssel, NL;
Marko Dorschu, Beek, NL;
Paulus A. M. Steeman, Geleen, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The invention relates to coated optical fibers comprising soft primary coatings and to such primary coatings for protecting glass optical fibers having a sufficient high resistance against cavitation. In particular, the primary coatings have a cavitation strength at which a tenth cavitation appears (σ) of at least about 1.0 MPa as measured at a deformation rate of 0.20% minand of at least about 1.4 times their storage modulus at 23° C. The coating preferably shows strain hardening in a relative Mooney plot, preferably has a strain energy release rate Go of about 20 J/mor more, and preferably has a low volumetric thermal expansion coefficient. The invention furthermore provides a method and apparatus for measuring the cavitation strength of a primary coating.