The wear resistance test of PVC baseball usually follows the standard methods for plastic wear resistance detection, and its wear resistance is affected by the material formula, manufacturing process and testing conditions. The following are the key analysis points:
Principle of wear resistance test
By simulating the wear process under actual usage conditions, the volume loss or mass change on the material surface caused by friction or abrasive action is evaluated. Common testing methods include the friction and wear testing machine method, the shakeout wear test method, etc. The results are expressed in terms of wear rate or friction coefficient.
The influence of PVC material properties on wear resistance
Molecular structure and additives: The wear resistance of PVC can be enhanced by adding reinforcing fillers (such as glass fibers) or optimizing the manufacturing process (such as cross-linking reactions). PVC with high crystallinity or cross-linked structure usually has better wear resistance.
Balance of hardness and toughness: Hard PVC does not contain softeners, has good flexibility and is not prone to cracking, making it suitable for manufacturing impact-resistant baseballs. However, soft PVC is prone to becoming brittle due to the presence of softeners and has poor wear resistance.
Test methods and standards
Taber Rotating Platform Abrasion Tester: It simulates wear through a sandpaper rotating wheel and measures the rate of mass or volume loss.
ASTM G65 standard: Wear is measured using a dry sand/rubber wheel device, which is suitable for evaluating the wear resistance of PVC under the friction of solid particles.
Comparison between the mortar method and the dry sand method: The mortar method may lead to more mass loss due to the presence of liquid medium, and the test results need to be interpreted in combination with the actual usage scenarios.
External factors affecting wear resistance
Humidity and chemical environment: The wear resistance of PVC may be affected by humidity or chemical substances, and it needs to be tested under specific conditions to simulate actual usage scenarios.
Manufacturing process optimization: By adjusting the reaction type (such as amide exchange reaction), adding block copolymers or optimizing the molding conditions (such as constant temperature, precision tools), the wear resistance of PVC can be enhanced.