The standards for silicone testing are an important part of ensuring the quality and safety of silicone products. These standards cover multiple aspects, including but not limited to appearance, physical properties, chemical properties, heat resistance, cold resistance, environmental protection and other dimensions. The following are some of the main silicone testing standards:
1. Appearance inspection
Standard: The appearance of silicone products should have no obvious defects such as damage, bubbles, color difference, and no odor.
Testing method: Visually inspect the appearance of silicone products to ensure that they meet the standards.
2. Physical performance test
Density and hardness test
Standard: The density and hardness of silicone products should meet the specified standard range.
Testing method: Use instruments such as densitometers and hardness meters for measurement.
Tensile strength and elongation at break
Standard: Silicone products need to achieve a certain tensile strength and elongation at break to ensure that they are not easy to break during use.
Testing method: Test with a tensile testing machine to record the force value and elongation during the stretching process.
Elasticity test
Standard: For products such as silicone buttons, it is necessary to test whether their elasticity reaches the specified number of times.
Testing method: Use a silicone key elasticity tester to test and record the number of times the key is pressed and the change in elasticity.
3. Chemical performance test
Soluble substance detection
Standard: The content of soluble substances in silicone products should meet national standards to ensure that they are harmless to human health.
Testing method: Detect the content of soluble substances in silicone by chemical analysis methods.
Corrosion resistance test
Standard: Silicone should have a certain tolerance to chemical substances such as acid, alkali, and salt.
Testing method: Place the silicone sample in acid, alkali, and salt solutions of different concentrations and observe its changes.
4. Heat resistance and cold resistance test
Standard: Silicone products need to be tested in high and low temperature environments to evaluate their heat resistance and cold resistance capabilities.
Testing method: Test by high temperature baking or low temperature refrigeration to observe the performance changes of silicone products.
5. Environmental protection test
Standard: The content of harmful substances in silicone products should meet national environmental protection requirements, including heavy metals, organic matter, etc.
Testing method: Conduct harmful substance testing through professional institutions to ensure the environmental protection of silicone products.
6. Other specific tests
Ignition test: Silicone products should have certain flame retardant properties to prevent fire accidents.
Packaging label test: The packaging label of silicone products should comply with relevant national regulations, including product name, production date, quality grade, manufacturer information, etc.
In addition, some silicone products for specific purposes may have other specific test standards, such as food-grade silicone products need to be tested for VOC (volatile organic compounds).