What are the quality standards for tire rubber at home and abroad?

Tire rubber, as a key raw material for tire manufacturing, its quality directly affects the performance and safety of tires. The following is a summary of the quality standards for tire rubber at home and abroad:

Domestic tire rubber quality standards

Routine project testing: tread rubber tensile test, tread rubber wear, tread rubber hardness, static load performance, as well as physical and chemical indicators such as Mooney viscosity, vulcanization characteristics, plasticity value, and recovery value of uncured rubber.

Specific standards:

GB8086-87: Method for determination of impurity content in natural rubber.

GB/T14796: Natural rubber color index determination method.

GB8085: Determination of ash content in natural rubber.

GB/T8087: Determination of volatile matter content in natural rubber.

GB/T8081: Natural rubber standard rubber specifications.

GB/T8088: Method for determination of nitrogen content in natural rubber.

These standards cover the main performance indicators and testing methods of tire rubber, ensuring that the quality of tire rubber meets the requirements of relevant domestic regulations and standards.

Foreign tire rubber quality standards

Although specific foreign tire rubber quality standards may vary by country and region, they usually cover the following aspects:

Physical properties, such as tensile strength, elongation at break, tear strength, etc., directly affect the durability and safety of tires.

Chemical properties, such as ash content, volatile matter content, nitrogen content, etc., reflect the purity and stability of tire rubber.

Process performance: such as vulcanization characteristics, Mooney viscosity, etc., which affect the processing performance and finished product quality of tire rubber.

In addition, some internationally renowned tire manufacturers and raw material suppliers also establish their own internal quality standards to ensure that the quality and performance of their products meet market demand and regulatory requirements.

Tire quality standards (closely related to tire rubber quality)

GB 9743-2024 "Car Tires" and GB 9744-2024 "Truck Tires": These two mandatory national standards specify the main parameters, outer edge dimensions, safety performance, rolling resistance performance, wet road surface relative grip performance requirements, test methods, judgment rules, markings, and implementation requirements of standards for car tires. Among them, the increase in relative grip performance requirements on wet roads can further improve the safety of tires driving on wet roads, and the increase in rolling resistance performance requirements is of great significance for car fuel saving and emission reduction.

In summary, there are strict regulations and requirements for the quality standards of tire rubber both domestically and internationally. These standards not only cover the physical, chemical, and process properties of tire rubber, but also consider factors such as tire safety and environmental friendliness. Therefore, tire manufacturers and raw material suppliers must strictly comply with relevant standards and regulatory requirements when producing and selling tire rubber, ensuring that the quality and performance of the products meet market demand and regulatory requirements.