Tyre cord, as the core support structure inside a tyre, is composed of a combination of rubber cloth and steel cord, playing a vital role in maintaining tyre shape, enhancing strength, and controlling deformation, thereby ensuring driving safety and stability.
Cord Classification and Characteristics
Tyre cords come in various types, each with its unique characteristics:
Viscose cord: Excellent fatigue resistance and heat resistance, good dimensional stability, but prone to moisture absorption which reduces strength, suitable for radial passenger car tyres.
Polyamide cord: High strength, good impact and fatigue resistance, but poor dimensional stability and adhesion to rubber, commonly used in truck, aircraft tyres, as well as adhesive tapes and hoses.
Polyester cord: High strength and large initial modulus, good thermal contraction and dimensional stability, but prone to heat generation from fatigue and reduction in strength due to hydrolysis, applicable to passenger car tyres.
Aromatic polyamide cord: High strength and modulus, better heat resistance and dimensional stability, but higher cost, suitable for high-performance tyres such as those for luxury cars, military vehicles, and aircraft.
Application Scenarios
The role of tyre cord in tyre manufacturing is significant:
Shape Maintenance: The strength and rigidity of cords keep the tyre in its correct shape, preventing deformation.
Strength Enhancement: They increase tyre hardness and load-bearing capacity, enhancing wear resistance and explosion prevention.
Deformation Control: They adapt to different road conditions, reducing deformation and friction, improving driving comfort and stability.
Noise Reduction: In high-performance tyres, cords placed in tread grooves reduce noise.
Drainage Enhancement: Cords in tread grooves make the tyre base smoother, improving drainage performance and preventing skidding on wet roads.
In summary, tyre cord, with their unique classification characteristics and wide range of application scenarios, play a crucial role in ensuring the safety and comfort of vehicle travel. From ordinary passenger cars to high-performance vehicles, cords are indispensable components of tyres, safeguarding every safe journey.