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.
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.
Abstract:
The present invention refers to a metal rope with improved features, in particular having high ultimate tensile strength and a high number of sustainable fatigue cycles. The metal rope (10) according to the present invention consists of a plurality of strands (12) wound around a central core (14) and is characterised in that the central core (14) is made of a fibre spun from a liquid-crystal polymer. Preferably, this fibre spun from a liquid-crystal polymer is Vectran ™ .
Abstract:
There are provided a pneumatic radial tire of heavy load vehicles, in which durability of a belt is improved. A pneumatic radial tire for heavy load vehicles comprises a pair of bead portions in each of which a bead core is embedded, a radial carcass ply 1 extending from one bead portion to the other bead portion and turned around the bead core from an inner side to an outer side of the bead core in a width direction of the tire and at least six belt layers 2 disposed on an outer side of this radial carcass ply 1 in a radial direction of the tire, wherein the following relations are satisfied: W 56 > W 34 > W 12 , where W 12 is a maximum width of first and second belts 2a f the belt layers 2, W 34 is a maximum width of third and forth belts 2b of the belt layers 2 and W 56 is a maximum width of fifth and sixth belts 2c of the belt layers 2; and 1 > D 12 /D 34 > 0.6, where D 12 is a cord diameter of the first and second belts and D 34 is a cord diameter of the third and forth belts. In addition, a steel cord of each belt layer has a double twist structure in which a plurality of steel filaments are twisted to form a cable and two to ten cables are further twisted.
Abstract translation:提供了一种重载车辆的充气子午线轮胎,其中带的耐久性得到改善。 一种用于重负荷车辆的充气子午线轮胎包括一对胎圈部分,每个胎圈部分包括胎圈芯,径向胎体帘布层1,其从一个胎圈部分延伸到另一个胎圈部分,并从胎圈芯的内侧转向 胎圈芯在轮胎的宽度方向上的外侧,以及沿轮胎的径向设置在该径向胎体帘布层1的外侧的至少6个带束层2,满足以下关系:W 56> W 34> W 12,其中W 12是带束层2的第一和第二带2a的最大宽度,W 34是带束层2和W 56的第三和第二带2b的最大宽度是最大宽度 带束层2的第五和第六带2c; 和1> D 12 / D 34> 0.6,其中D 12是第一和第二带的帘线直径,D 34是第三和第四带的帘线直径。 此外,每个带束层的钢丝绳具有双绞结构,其中多根钢丝被扭曲形成缆线,并且两至十条缆线进一步扭转。
Abstract:
A cord for rubber reinforcement of the present invention includes a core strand including a plurality of strands (A), and a plurality of strands (B) disposed around the core strand. In the core strand, the plurality of strands (A) are finally twisted, and each of the plurality of strands (A) is formed of a plurality of reinforcing fibers (A) that are primarily twisted. Each of the plurality of strands (B) is formed of a plurality of reinforcing fibers (B) that are primarily twisted, and the plurality of strands (B) are finally twisted to be disposed around the core strand. The direction of final twist of the plurality of strands (B) is the same as the direction of primary twist in at least one strand (B) selected from the plurality of strands (B). The number of primary twists in the strand (B) is greater than the number of primary twists in the strand (A), and/or the number of final twists of the strands (B) is greater than the number of final twists of the strands (A).
Abstract:
A steel cord for the reinforcement of rubber articles is formed by twisting 4-5 strands, each strand (1) being formed by twisting a sheath (3) of 4-5 steel filaments around a core (2) of a single steel filament, wherein a ratio of diameter d S of the steel filament constituting the sheath to diameter d C of the steel filament constituting the core is within a range of 1.00 - 1.75, and a twisting direction of the sheath in the strand is the same as a twisting direction of the strand in the cord, and a twisting angle a of the sheath in the strand with respect to an axis of the cord, as calculated by a certain defined equation, is within a range of 30 - 52°.
Abstract in simplified Chinese:一种将同步皮带或发送皮带加以强化所用的钢索(10),此钢索包含仅二至五条股(12),这些股在索之扭结节距处以紧密方式彼此扭结于第一方向上。各该股(12)包含仅二至七条钢纤(14),这些钢纤(14)在股之扭结节距处以紧密方式彼此扭结于该第一方向上。钢纤(14)之直径范围从0‧03至0‧4mm。股之扭结节距与钢纤直径之比率大于30、索之扭结节距与钢纤直径之比率大于30、且索之扭结节距与股之扭结节距之比率大于1。此种钢索在轴向负荷下具有可接受之低扭矩。
Abstract:
Câblé textile aramide (50) à au moins triple torsion (T1, T2, T3), comportant au moins N brins (20a, 20b, 20c, 20d), N étant supérieur à 1, retordus ensemble selon une torsion finale T3 et une direction finale D2, chaque brin étant constitué de M pré-brins (10a, 10b, 10c), M étant supérieur à 1, eux-mêmes tordus ensemble selon une torsion intermédiaire T2 (T2a, T2b, T2c, T2d) et une direction intermédiaire D1 opposée à D2, chaque pré-brin consistant lui-même en un filé (5) qui a été tordu préalablement sur lui-même selon une torsion initiale T1 (T1a, T1b, T1c) et la direction D1, dans lequel au moins la moitié des N fois M filés sont des filés aramides. Ce câblé textile est avantageusement utilisable comme renfort dans les pneumatiques pour véhicules, en particulier dans la ceinture ou dans l'armature de carcasse de ces pneumatiques.
Abstract:
Câblé textile cellulosique (50) à au moins triple torsion (T1, T2, T3), comportant au moins N brins (20a, 20b, 20c, 20d), N étant supérieur à 1, retordus ensemble selon une torsion finale T3 et une direction finale D2, chaque brin étant constitué de M pré-brins (10a, 10b, 10c), M étant supérieur à 1, eux-mêmes tordus ensemble selon une torsion intermédiaire T2 (T2a, T2b, T2c, T2d) et une direction intermédiaire D1 opposée à D2, chaque pré-brin consistant lui-même en un filé (5) qui a été tordu préalablement sur lui-même selon une torsion initiale T1 (T1a, T1b, T1c) et la direction D1, dans lequel au moins la moitié des N fois M filés sont des filés cellulosiques. Ce câblé textile est avantageusement utilisable comme renfort dans les pneumatiques pour véhicules, en particulier dans la ceinture ou dans l'armature de carcasse de ces pneumatiques.