What are the items included in tire rubber quality testing?

Tire rubber quality testing is a comprehensive evaluation process aimed at ensuring the performance, safety, and reliability of tire rubber. Here are some common tire rubber quality testing items:

1、 Physical performance testing

Tensile strength test: Evaluate the maximum stress of rubber materials during stretching, reflecting their ability to withstand tensile loads.

Fracture elongation test: Measure the maximum elongation of rubber before fracture to evaluate its ductility and toughness.

Hardness testing: Use a Shore hardness tester or other hardness testing instrument to measure the hardness of rubber, reflecting its softness or rigidity.

Tear strength test: Evaluating the ability of rubber materials to resist tearing, conducted through a tear testing machine.

Rebound rate test: Use a rebound tester to measure the resilience of rubber, reflecting its ability to recover to its original shape.

2、 Chemical performance testing

Chemical composition analysis: Infrared spectrometer, atomic absorption spectrometer and other instruments are used to analyze the chemical composition of rubber, such as natural rubber, synthetic rubber, fillers (such as carbon black or silica), plasticizers, vulcanizing agents, etc.

Thermal stability testing: The stability of rubber at high temperatures is tested using instruments such as thermogravimetric analyzers to evaluate its thermal decomposition behavior and heat resistance.

Dielectric resistance test: Soak the rubber sample in a specific medium (such as oil, water, acid, alkali, etc.), observe its performance changes, and evaluate its dielectric resistance performance.

3、 Aging performance test

Thermal aging test: Conduct accelerated aging tests on rubber at high temperatures, measure changes in its physical properties such as hardness, tensile strength, and elongation at break, and evaluate its thermal aging performance.

Ozone aging test: Expose rubber to a high concentration of ozone environment, simulate its aging behavior in atmospheric pollution environment, and observe the generation and propagation of surface cracks.

UV aging test: Expose rubber to a strong UV environment to evaluate its ability to resist UV aging and simulate its use under strong light.

4、 Wear resistance test

Wear resistance is one of the important performance indicators of tire rubber, which directly affects the service life of the tire. The commonly used wear resistance testing methods include Akron abrasion test and rotary roller abrasion test, which evaluate the wear resistance of rubber by measuring its wear amount under specified load and speed.

5、 Wet and slippery performance test

Wet performance testing is used to evaluate the grip ability of tire rubber on wet road surfaces. Common testing methods include wet friction coefficient testing and braking distance testing. These tests can simulate wet conditions in actual driving scenarios and evaluate the safety and reliability of tire rubber on wet roads.

6、 Other performance tests

In addition to the above testing items, it may also include some specific performance testing items, such as dynamic fatigue testing (evaluating the fatigue life of rubber under dynamic loads), shear strength testing (measuring the shear strength of rubber), compression permanent deformation testing (measuring the ability of rubber to recover its original shape after compression), etc.

In summary, tire rubber quality testing is a comprehensive and complex evaluation process that involves multiple aspects of performance testing and chemical analysis. These testing items can ensure that the quality of tire rubber meets relevant standards and requirements, improving the safety, reliability, and service life of tires.