How to check the quality of tire rubber?

Testing the quality of tire rubber involves multiple aspects, including physical performance testing, chemical composition analysis, aging performance testing, etc. Here are some specific detection methods:

1、 Physical performance testing

Hardness test:

Use a hardness tester (such as Shore hardness tester, Rockwell hardness tester, etc.) to measure the hardness of tire rubber. The hardness value reflects the softness or rigidity of the rubber material, and moderate hardness can ensure that the tire can provide good grip and comfort at different temperatures.

Tensile strength and elongation at break testing:

Measure the maximum stress and elongation of tire rubber when stretched to fracture using a tensile testing machine. These indicators reflect the toughness and durability of tire rubber.

Tear strength test:

Use a tear testing machine to evaluate the ability of tire rubber to resist tearing. High tear strength means that tire rubber is less prone to cracking and damage during actual use.

Rebound rate test:

Use a rebound tester to test the rebound performance of tire rubber to evaluate its elastic recovery ability.

2、 Chemical composition analysis

Infrared spectroscopy analysis:

Used to analyze the chemical functional groups in tire rubber, helping to determine the type of rubber and the presence of major additives.

Thermogravimetric analysis:

Measure the thermal stability and composition ratio of tire rubber to help identify the content and thermal decomposition behavior of different components in rubber.

Gas chromatography-mass spectrometry analysis:

Mainly used for analyzing volatile and semi volatile components in tire rubber, such as plasticizers and vulcanizing agents.

3、 Aging performance test

Thermal aging test:

Accelerate the aging of tire rubber at high temperatures and measure the changes in its physical properties such as hardness, tensile strength, and elongation at break. This can simulate the long-term use of tires in high-temperature environments.

Ozone aging test:

Expose tire rubber to high concentration ozone environment and simulate its aging behavior in atmospheric pollution environment. Mainly observe the generation and propagation of surface cracks.

UV aging test:

Expose the tire rubber to a strong ultraviolet environment and evaluate its ability to resist ultraviolet aging. This can simulate the use of tires under strong light.

4、 Wear resistance test

Akron abrasion test:

Measure the wear of tire rubber under specified load and speed to evaluate its wear resistance. This is one of the common methods for evaluating the wear resistance of tire rubber.

5、 Other tests

Wet and slippery performance test:

Measure the friction coefficient and braking distance of tire rubber on wet and slippery road surfaces to evaluate its wet and slippery performance. This is crucial for ensuring driving safety.

Adhesion test:

Conduct adhesion testing on a small area of rubber material to observe whether the tire rubber can adhere firmly and evaluate its tensile strength. This is particularly important for tire adhesive products such as tire repair glue.

Dielectric resistance performance test:

Soak the tire rubber sample in a specific medium and observe its performance changes. This can evaluate the stability and durability of tire rubber in different media environments.

In summary, testing the quality of tire rubber requires comprehensive consideration of multiple aspects, including physical performance testing, chemical composition analysis, aging performance testing, wear resistance testing, and other related tests. These testing methods can help manufacturers and users comprehensively evaluate the performance and quality of tire rubber, ensuring its safety and reliability during use.