PROBLEM TO BE SOLVED: To provide a steel cord for tire reinforcement with improved fatigue resistance, rubber permeability and reliability.SOLUTION: A steel cord for tire reinforcement 1 comprises a first-twist yarn 100 and a final-twist yarn 200 that covers an outer peripheral surface of the first-twist yarn 100 so that the steel cord has a (m+n) structure. The first-twist yarn 100 comprises multiple core wires 110. The core wires 110 have flat faces 112 that are formed at sections to be contacted with each other. The core wires 110 contact with each other at the flat faces 112. The final-twist yarn 200 has 2 to 20 pieces of element wires 210. The element wires 210 are twisted around a central axis that is an axis of the first-twist yarn 100 in a longer direction so that the twisted element wires cover the outer peripheral surface of the first-twist yarn 100. The steel cord for tire reinforcement has a non-circular cross section.SELECTED DRAWING: Figure 1B
【課題】耐疲労性、ゴム浸透性及び信頼性が向上したタイヤ補強用スチールコードの提供。【解決手段】(m+n)構造を有するように、下撚り100、及び下撚り100の外周面を覆い包む上撚り200を含み、下撚り100は、複数の芯線110を含み、それぞれの芯線110は、互いに接する領域に形成された扁平面112を含み、芯線110は、扁平面112を介して、互いに面接触され、上撚り200は、2本ないし20本の素線210を含み、素線210は、下撚り100の長手方向軸を中心軸にし、下撚り100の外周面を覆い包むように撚線され、非円形断面を有するタイヤ補強用スチールコード1。【選択図】図1B
STEEL CORD FOR TIRE REINFORCEMENT
タイヤ補強用スチールコード
2016-05-16
Patent
Elektronische Ressource
Japanisch