Surface treatment method of tire bead steel wire of radial tire

Abstract

The invention provides a surface treatment method of a tire bead steel wire of a radial tire. The tire bead steel wire is successively treated by the following working procedures including chemical hydrochloric acid washing, electrolysis sulfuric acid washing, electroless copper plating, paintcoat coating and drying, wherein chemical copper plating solution is aqueous solution of copper sulfate, magnesium stearate, sodium ethylene diamine tetracetate, alkylol amine, sodium dodecyl benzene sulfonate, sodium hypophosphite, hydrazine hydrate, boracic acid, sodium 3,3'-dithiodipropane sulfonate, lecithin and starch acetate. A paint formula adopted by paintcoat coating comprises coumarone resin, hexakis methoxymethyl melamine, benzotriazole, chloride natural rubber, phenolic resin, nanosilicon dioxide dispersoid, chlorinated polyethylene, methylbenzene and acetone. According to the treatment method, adhesive force between the tire bead steel wire and rubber can be enhanced, the surface rubber adhesion ratio of the steel wire after bonding is improved, and steel wire preservation time is prolonged.

Description

technical field [0001] The invention belongs to the technical field of tire production, and in particular relates to a surface treatment method for radial tire bead wire. Background technique [0002] Today's tire industry is making great strides in the direction of active research and development of "three modernizations" (that is, radial tires, tubeless tires and flat tires) with high technical content, high precision and excellent performance. Radial tires are increasingly favored for their excellent performances such as high speed, wear resistance, fuel economy and high mileage. In recent years, the development of steel wire skeleton materials for tires is mainly reflected in new technologies and new products (new structural steel cords), the purpose of which is to provide steel wire skeleton materials with better performance and a wider selection range for the tire industry. [0003] Radial tire bead wire is a steel wire plated with bronze, copper or brass, etc., whi...

AI Technical Summary

Problems solved by technology

At present, in the bead wire manufacturing industry, the tin bronze coating on the surface of the steel wire is mainly low-tin bronze. The tin bronze layer on the surface of the steel wire is used to enhance the adhesion between the bead wire and the tire rubber, so as to realize the bond between the steel wire and the tire rubber. Tightly combined to play the role of bead steel wire as the tire frame material. Once rust occurs, the low-tin bronze will not be corroded but the steel wire substrate will be corroded quickly, the coating will lose its protective effect on the steel wire substrate, and the low-tin bronze will peel off from the steel wire substrate. It is difficult for the bead wire to withstand the tension, compression, torsion, and centrifugal force generated during the driving process of the car, which can easily cause the bead to loosen and cause the tire to burst, resulting in traffic accidents