Test of wear resistance of food-grade silicone key chains

For the wear resistance test of food-grade silicone key chains, the following methods and key points can be referred to:

Test preparation

Sample preparation: Select representative food-grade silicone key chain samples, ensuring that the sample surface is free of defects and damages, and that the size and shape meet the testing requirements.

Testing equipment: Prepare a wear resistance tester. This equipment should have adjustable functions such as friction speed, pressure and friction frequency to meet different testing requirements. At the same time, a suitable friction head should also be prepared. The material and shape of the friction head should be selected based on the actual usage scenario, such as simulating the material that comes into contact with keys and other items in daily use.

Test method

Set test parameters: According to the expected usage environment and requirements of the food-grade silicone key chain, set the appropriate friction speed, pressure and friction frequency. Generally speaking, the friction speed can be selected from the common tens to hundreds of revolutions per minute. The pressure can be set according to the actual situation, such as several Newtons to tens of Newtons. The number of frictions can be determined according to the testing purpose and standards, for example, from several thousand times to tens of thousands of times.

Conduct a wear resistance test: Install the food-grade silicone key chain sample on the wear resistance tester, adjust the position and Angle of the friction head properly, and ensure that the friction head is in full contact with the sample surface. Start the tester and conduct the wear resistance test according to the set parameters. During the testing process, it is necessary to closely observe the changes on the surface of the sample, such as whether there are any signs of wear, scratches, color fading, etc.

Record test data: During the testing process, promptly record the wear conditions on the sample surface, including the depth, area, and shape of the wear. Meanwhile, record the relevant parameters during the testing process, such as friction speed, pressure, and the number of frictions, for subsequent analysis and evaluation.

Evaluation criteria

Appearance changes: Observe the appearance changes of food-grade silicone key chain samples after the wear resistance test, such as whether there are obvious wear marks, scratches, color fading, etc. If the surface of the sample shows severe wear, color fading and other phenomena, it indicates that its wear resistance is poor. Conversely, if the surface of the sample shows only slight wear or no obvious changes, it indicates that its wear resistance is relatively good.

Performance impact: Check whether the performance of food-grade silicone key chains has been affected after the wear resistance test, such as their elasticity, softness, and the firmness of the connection parts, etc. If the wear resistance test leads to a significant decline in the performance of the key chain, such as reduced elasticity and loose connection parts, it indicates that its wear resistance cannot meet the actual usage requirements.

Precautions

Test environment: The wear resistance test should be conducted in a constant temperature and humidity environment to avoid the influence of environmental factors on the test results. Generally speaking, the temperature of the test environment can be controlled at 20-25℃, and the humidity can be controlled at 40% – 60%.

Multiple tests: To ensure the accuracy and reliability of the test results, multiple wear resistance tests should be conducted, and the average value should be taken as the final result. Meanwhile, samples of food-grade silicone key chains from different batches should also be tested separately to evaluate the consistency and stability of the products.