As a common plastic product, mobile phone cases are often exposed to outdoor environments and are vulnerable to ultraviolet light. In order to evaluate the weather resistance of mobile phone case materials to ensure that they do not experience color fading, surface deterioration, and mechanical properties degradation during use, ultraviolet aging tests are required.
The UV aging test can simulate the environment where the mobile phone case is exposed outdoors for a long time. By being exposed to ultraviolet light sources, the material is exposed to ultraviolet light and other environmental factors, the weather resistance of the material is detected, and its durability in actual use is predicted..
In the durability test of mobile phone casings, some international/national standards are generally referred to. The following are several reference standards for UV aging:
ISO 4892-2:2013: Plastics - Light aging - Part 2: Ultraviolet radiation
ASTM G154: Standard Test Method, Artificial Photoaging Test Based on Saturated Longwave Ultraviolet Radiation
IEC 60068-2-5: Part 2-5: Testing Eh: Solar irradiation
JIS D0205: Test Method for Plastics - 8.6: Test Method for Ultraviolet Aging
So what unit needs to test the durability of the mobile phone case? There are three main units in the production supply chain of the mobile phone case that need to test its durability. First, mobile phone manufacturers: The weather resistance of the mobile phone case is one of the important indicators of the quality of mobile phone products. Through the UV aging test, the weather resistance of different materials can be evaluated, the material selection can be optimized, and the problems such as color fading and surface deterioration will not occur in the long-term use of the mobile phone case. Second, plastic material suppliers: Suppliers can use the UV aging test to evaluate the weather resistance of their plastic materials, and provide mobile phone manufacturers with materials that meet the requirements. By continuously improving the weather resistance of materials, suppliers can improve the competitiveness of their products. Third, R & D institutions and laboratories: R & D institutions and laboratories can evaluate the weather resistance of new materials and compare them with traditional materials through ultraviolet aging tests. This helps guide the development and improvement of new materials.
So how to use the UV aging test box to test the durability of the mobile phone case? The following are the general steps of the UV aging test of the mobile phone case:
First, select a representative sample of the mobile phone case and ensure that the sample size meets the test requirements. Samples of different materials, colors and textures can be selected for testing.
Second, according to the test requirements, set the test conditions such as UV light intensity, temperature and humidity. The test conditions can be controlled by using a UV aging Test Chamber or a UV aging test instrument.
Third, install the mobile phone case sample in the test equipment to ensure that the surface of the sample is exposed to the ultraviolet light irradiation area. The sample should be installed in a manner similar to the actual use case, such as vertical or horizontal installation.
Fourth, start the ultraviolet light equipment, and carry out ultraviolet light according to the time and irradiation intensity set by the test equipment. According to the test requirements, continuous irradiation or periodic irradiation can be selected.
Fifth, regularly observe and record the changes of the sample, including color changes, surface deterioration, cracking, cracks, etc. Quantitative analysis can be performed using color measuring instruments, microscopes, tensile testing devices and other equipment.
Sixth, according to the test requirements, end the test. Take out the sample and perform final observation and recording.
Seventh, according to the test results, evaluate the weather resistance of the sample. Compare the differences before and after the test to judge the aging degree and performance changes of the sample.
Precautions for use
When carrying out the ultraviolet aging test of the mobile phone case, the following matters should be paid attention to:
Choose samples of materials, colors and textures similar to the actual phone case.
Test conditions are set according to the actual use environment, including light intensity, temperature and humidity.
Changes in the sample are regularly observed and recorded to capture subtle changes during aging.
Ensure proper operation and maintenance of test equipment and follow safe operating procedures.
Refer to relevant industry standards and specifications, such as ISO, ASTM, JIS, etc., to ensure the accuracy and comparability of tests。
