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. 07, 1984
Filed:
Sep. 30, 1982
Paul Smith, Sittard, NL;
Pieter J Lemstra, Brunssum, NL;
Stamicarbon B.V., Geleen, NL;
Abstract
The invention relates to the preparation of filaments with a high tensile strength and a high modulus and to the filaments thus prepared. A solution of a linear polyethylene with a weight-average molecular weight of at least 4.times.10.sup.5 is spun and the filaments, from which the solvent may have been removed in whole or in part, are drawn using a draw ratio of at least (12.times.10.sup.6 /M.sub.w)+1. The filaments are drawn at a temperature such that the modulus is at least 20 GPa. The invention allows filaments to be prepared at high drawing rates, of 0.5 sec.sup.-1 or more, with a modulus of at least 20 GPa and a tensile strength of at least 1 GPa.