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1. (WO2010112304) HIGH ELONGATION STEEL CORD WITH PREFORMED STRANDS

Pub. No.:    WO/2010/112304    International Application No.:    PCT/EP2010/052943
Publication Date: Fri Oct 08 01:59:59 CEST 2010 International Filing Date: Wed Mar 10 00:59:59 CET 2010
IPC: D07B 1/06
Applicants: NV BEKAERT SA
DEL RÍO RODRIGUEZ, Javier
WOSTYN, Steven
Inventors: DEL RÍO RODRIGUEZ, Javier
WOSTYN, Steven
Title: HIGH ELONGATION STEEL CORD WITH PREFORMED STRANDS
Abstract:
A steel cord (30) with a high elongation at break of at least 5% comprises n strands (20), each of said strands (20) has m filaments (10) twisted together, n ranges from 2 to 7. m ranges from 2 to 9. The strands and the filaments are twisted in a same direction. The lay length of the cord is Lc and the lay length of said strand is Ls. The ratio of Ls to Lc (Ls/Lc) ranges from 0.25 to 1. Lc ranges from 16 mm to 26 mm. The strands are helically preformed. The E-modulus of the cord is more than 150000 N/mm2. The helical preforming of the strands allows to obtain a high elongation at break and a high E-modulus despite its long lay length Lc.