Radial tire bead wire containing surface coating and preparation method of radial tire bead wire

Abstract

The invention discloses a radial tire bead wire containing a surface coating.The radial tire bead wire is characterized in that the surface of the radial tire bead wire is plated with the coating, the coating comprises an inner layer and an outer layer, the outer layer is a copper-nickel-aluminum-zinc coating with the thickness being 0.04-0.06 micron, and the inner layer is a copper-nickel-zinc coating with the thickness being 0.05-0.08 micron; the content of copper in the copper-nickel-aluminum-zinc coating is 30-38 wt%, the content of nickel in the copper-nickel-aluminum-zinc coating is 21-28 wt%, the content of aluminum in the copper-nickel-aluminum-zinc coating is 5-12 wt%, the balance is zinc, the content of copper in the copper-nickel-zinc coating is 32-48 wt%, the content of nickel in the copper-nickel-zinc coating is 22-26 wt%, and the balance is zinc. The invention further discloses a preparation method of the radial tire bead wire containing the surface coating. According to the radial tire bead wire containing the surface coating, the number of coatings is reduced, the copper-nickel-aluminum-zinc coating is adopted as the outer layer, the bonding force is improved while the coating stripping risk is reduced, and the radial tire bead wire can be suitable for various kinds of rubber.

Description

technical field [0001] The invention belongs to the technical field of tire bead steel wire, and in particular relates to a radial tire bead steel wire with a surface coating and a preparation method thereof. Background technique [0002] The international code name of radial tire is "R". Because its carcass structure is different from that of bias tire, some countries call it radial tire, X tire, etc. The cord arrangement of radial tire carcass is different from that of bias tire. The cords of tires are not arranged cross each other, but are nearly parallel to the cross section of the tire, arranged like the meridian of the earth, the cord angle is small, generally 0°, and there is no maintenance intersection between the carcass cords. When the tire is running, The increase of stress around the crown will cause circumferential stretching and radial cracks in the carcass. In this state, the bead wire bears a large pressure. If the adhesion between the bead wire and rubber is...

AI Technical Summary

Problems solved by technology

[0003] The prior art (patent No. CN201810917596.X, patent name "a bead wire with multi-layer coating and its coating coating method") discloses a bead wire with three layers of coating, so that the coating can match multiple It is a kind of tire rubber, but too many coating layers will easily lead to poor bonding between multi-layer coatings, resulting in the risk of detachment between coatings, which is dangerous