Abstract:
A pneumatic radial tire comprising a belt layer, comprised of steel cords having a lateral flat cross-section, arranged around an outer periphery of a tread portion of a carcass layer so that the diameter direction of the steel cords is made to follow the planar direction of the belt layer, the steel cord is made a flat 1 × 6 twist structure comprised of filaments of a filament diameter d of 0.20 to 0.40 mm, the long diameter D L and twist pitch P of the steel cord taken out from the tire are made with respect to the filament diameter d as follows: 3.67 d - 0.04 ≦ D L ≦ 3.67 d + 0.16 30d ≦ P ≦ 45d and the elongation of the steel cord caused when increasing a load from 0.25 kg to 5.0 kg is made 0.25% or less.
Abstract:
A steel cord for use as reinforcing materials for rubber products, especially automobile tires. For improving rubber penetrativity and break-resistance, three to six material wires are intertwisted into a steel cord having a cross section of elliptical shape of with adjoining material wires substantially contacting with each other at the area of both ends of the ellipse and separating from each other at the other area. Where necessary, a high elongation of more than 5% is imparted by intertwisting material wires at
Abstract:
Luftreifen mit mindestens einem aus mehreren Stahldrähten zusammengesetzten, flach ausgebildeten Verstärkungscord, der eine längere und eine kürzere Querschnittsdimension aufweist, wobei der Verstärkungscord aus einem flachen, ungedrehten Kern besteht, um welchen mindestens sechs Einzeldrähte geschlagen sind, dadurch gekennzeichnet, daß der flache Verstärkungscord (6, 7) im Gürtel und/oder in der Decke derart angeordnet ist, daß die größere Querschnittsdimension des Verstärkungscordes zumindest annähernd parallel zur Gürtel- bzw. Deckenkontur angeordnet ist. Der Kern kann aus mehreren meist runden Stahlcorden zusammengesetzt sein, oder er besteht aus einem flachen Stahldraht (10).
Abstract:
A steel cord used to reinforce a tire according to the present invention includes a lower edge and an upper edge surrounding the outer peripheral surface of the lower edge to form m + n structures. The lower edge includes multiple cores extending in parallel without being twisted together. Each of the cores includes a flat surface in the intersecting area and the cores are in surface contact with each other through the flat surface.
Abstract:
본 발명에 따른 타이어 보강용 스틸코드는, 복수의 소선이 주기적으로 서로 꼬아져 이루어진 자동차 타이어 보강용 스틸코드에 있어서, 압연가공에 의해 그 압연가공 방향으로 서로 인접한 소선끼리의 상호 압착에 의해 그 소선들은 비원형 단면을 가지는 것을 특징으로 한다.