公开(公告)号：US20240360621A1

公开(公告)日：2024-10-31

申请号：US18571858

申请日：2022-06-20

申请人： NV BEKAERT SA

发明人： Aijun ZHANG ,  Haijun MA

IPC分类号： D07B1/06 ,  B60C9/00

CPC分类号： D07B1/062 ,  B60C9/0007 ,  B60C2009/0085 ,  B60C2009/0092 ,  D07B2201/1044 ,  D07B2201/2007 ,  D07B2201/2009 ,  D07B2205/3025 ,  D07B2501/2046

摘要： The invention provides a steel cord, the steel cord comprises two or more steel filaments, at least one of the steel filaments has a twist pitch of 6 mm to 40 mm, each of the steel filaments has a tip rise of less than 5 mm with a gauge length of 200 mm after being unravelled out of the steel cord. The invention steel cord has an improved straightness with reduced steel filament fracture risk.

公开(公告)号：US20230392319A1

公开(公告)日：2023-12-07

申请号：US18268719

申请日：2021-11-30

申请人： NV Bekaert SA

发明人： Aijun ZHANG ,  Haijun MA ,  Yaodong LI

IPC分类号： D07B1/06

CPC分类号： D07B1/0606 ,  D07B2201/1044 ,  D07B2201/2022 ,  D07B2201/2067 ,  D07B2205/3025 ,  D07B2201/1028

摘要： The invention provides a steel cord with a construction of n×1, n is the number of the steel filaments of the steel cord, the steel cord has an elongation at 2.5N-50N of less than 1.2% and a twist pitch of greater than 16 mm, each of the steel filaments has a form of helical wave with a wave length L expressed in mm and a wave height H expressed in mm when being unravelled from said steel cord, L is greater than 16 mm, each of the steel filaments has a space volume Vs satisfying that, Vs=L×H2×π/4, and Vs>20 mm3. The invention steel cord is beneficial for the stress distribution.