Abstract:
core strands comprising strands (A); and strands (B) disposed on the periphery of the core strands. In the core strands, the strands (A) have been upper-twisted and each strand (A) is composed of reinforcing fibers (A) and has been first-twisted. The strands (B) each is composed of reinforcing fibers (B) and has been first-twisted. The strands (B) have been upper-twisted and are disposed around the core strands. The direction of the upper twisting of the strands (B) is the same as the direction of the first twisting of at least one strand (B) selected among the strands (B). The number of first twists of the strands (B) is larger than the number of first twists of that strand (B) and/or the number of upper twists of the strands (B) is larger than the number of upper twists of that strand (B).
Abstract:
An elevator rope comprising an elastomer coated, multistrand steel wire cable is claimed. In such a cable strands have a lay-length of at least 6.5 times the diameter of the bare cable diameter D. The cable is further coated with an elastomeric jacket, which adheres to the strands with a pull-out force not less than 15xD+15 newton per mm. The advantages of such an elevator rope are amongst others its limited elongation, its reduced diameter and its improved fatigue life.
Abstract:
A steel cord (10) for the reinforcement of timing belts or transmission belts comprises only two to five strands (12) tightly twisted with each other in a first direction at a cord twisting pitch. Each of said strands (12) comprises only two to seven steel filaments (14) tightly twisted with each other in this first direction at a strand twisting pitch. The steel filaments (14) have a diameter ranging from 0.03 to 0.40 mm. The ratio strand twisting pitch to filament diameter is greater than 30, the ratio cord twisting pitch to filament diameter is greater than 30, and the ratio cord twisting pitch to strand twisting pitch is greater than 1. Such a steel cord has an acceptable low torsion moment under axial loads.
Abstract:
PROBLEM TO BE SOLVED: To provide a steel cord for reinforcement of a rubber product that improves the cord strength by preventing the occurrence of advance breaking of the outermost layer filaments of the steel cord having a multi-twisted structure, and a pneumatic tire which uses the same as a reinforcing material. SOLUTION: The steel cord for reinforcement of the rubber product has the multi-twisted structure formed by twisting multiple strands having a layer-twisted structure of multiple twisted steel filaments, with the ratio dc/ds of the diameter dc of outermost layer sheath filaments which form the outermost layer sheath of the core strands and the diameter ds of outermost layer sheath filaments which form the outermost layer sheath of the sheath strands being 1.05-1.25. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a rubber-steel cord composite suitable as a reinforcement of a heavy load pneumatic radial tire usable as a mining vehicle tire, and to provide a heavy load pneumatic radial tire designed to improve bead part durability by applying the composite to a bead part reinforcing layer. SOLUTION: The steel cord has a double twisted structure obtained by twisting N pieces (N=2-8) of strands 2 obtained by twisting plural wires 1, and when the diameter of the strand 2 is d (mm), the circumscribing circle diameter of the cord is D (mm) and the twisting pitch of the cord is P (mm), ε c defined by the formula: ε c =√[-b/2+√(b 2 /4-c)]-1 [wherein, b is -1+π 2 (-4R 2 +d 2 )/P 2 ; c is π 2 d 2 k(4π 2 R 2 +P 2 )/P 4 ; R is (D-d)/2; and k is tan 2 (π/2-π/N)] satisfies ε c ≥0.01, and elongation at break is ≥3.0%. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation:要解决的问题:提供一种适合作为可用作采矿车辆轮胎的重载充气子午线轮胎的加强件的橡胶 - 钢丝绳复合物,并且提供设计成通过以下方式改善胎圈部件耐久性的重负荷充气子午线轮胎 将复合材料施加到胎圈部分增强层上。 解决方案:钢帘线具有通过扭转通过扭绞多根线1获得的线股2的N个(N = 2-8)而获得的双扭转结构,并且当线股2的直径为d(mm)时, 帘线的外接圆直径为D(mm),帘线的捻线间距为P(mm),ε c SB>由下式定义: -b / 2 +√(b 2 SP> / 4-c)] - 1 [其中,b是-1 +π 2 < SP> + D 2 SP>)/ P 2 SP>; c是π 2 SP> d 2 SP> k(4π 2 SP> R 2 SP> + P 2 SP> )/ P 4 SP>; R为(D-d)/ 2; 并且k是tan 2(π/ 2-π/ N)]满足ε c SB>≥0.01,断裂伸长率≥3.0%。 版权所有(C)2008,JPO&INPIT