| 摘要 |
PURPOSE:To produce an effect inherent in a flat wire so as to improve durability in a pneumatic tyre for an automobile, by a method wherein a reinforcing material is formed by a steel wire, being specific in a carbon content, tensile strength, break elongation, and flat or oval in cross section. CONSTITUTION:A reinforcing steel is formed by using a steel wire having a carbon content of 0.65-90%, tensile strength of 150kg/mm or more, and break elongation of 3.6-10.0% and formed in a flat or an oval shape. In this case, a ratio of the thickness to the width of the flat wire is set to 1.5-15. This constitution permanently provides the effect of a flat wire, and produces a tyre having durability.
|
