How to prevent the discoloration of plastic coils during long-term use?
Publish Time: 2025-03-13
A-PET (amorphous polyethylene terephthalate) sheets are widely used in the production of plastic coils due to their excellent physical properties and processing properties. However, during long-term use, plastic coils may face the problem of discoloration, which not only affects the appearance quality of the product, but may also have adverse effects on the performance and life of the product. Therefore, how to effectively prevent the discoloration of plastic coils has become the focus of common concern of manufacturers and users.There are many reasons for the discoloration of plastic coils, mainly including ultraviolet radiation, oxidation reaction, thermal degradation, and chemical reactions with other substances. Among them, ultraviolet radiation is one of the most common reasons. Ultraviolet rays can destroy the chemical bonds in the A-PET molecular chain, causing changes in the molecular structure, thereby causing discoloration. In addition, oxygen and moisture may also react with A-PET at high temperatures to generate colored substances, causing the coil to discolor.In order to effectively prevent the discoloration problem of plastic coils, you can start from the following aspects:First, choosing high-quality A-PET sheets as raw materials is the key. High-quality A-PET sheets have better weather resistance and stability, and can resist the erosion of ultraviolet rays, oxygen and moisture to a certain extent, thereby delaying the occurrence of discoloration. Therefore, when selecting raw materials, manufacturers should strictly control the quality to ensure that the selected materials meet the relevant standards and requirements.Secondly, during the production process, the protection of A-PET sheets should be strengthened. For example, during the processing, avoid long-term exposure to ultraviolet rays, and use equipment that shields or reflects ultraviolet rays; at the same time, control the processing temperature and humidity to reduce the contact opportunities between oxygen and moisture and A-PET. In addition, an appropriate amount of antioxidants and light stabilizers can be added during the production process to improve the weather resistance and stability of A-PET sheets.In addition to protection during the production process, the storage and use environment are also important factors that affect the discoloration of plastic coils. During storage, the coils should be placed in a dry, cool, ventilated place to avoid direct sunlight and high temperature environment. During use, care should also be taken to avoid long-term exposure of the coils to ultraviolet rays or contact with harmful substances.In addition, regular inspection and maintenance of plastic coils are also important measures to prevent discoloration. By regularly checking the appearance and performance changes of the coil, potential discoloration problems can be discovered and dealt with in a timely manner. For coils that have already shown slight discoloration, appropriate remedial measures such as cleaning and coating with a protective layer can be taken to delay further development of discoloration.In short, preventing the discoloration of plastic coils during long-term use requires multiple aspects. By selecting high-quality raw materials, strengthening protection during the production process, controlling the storage and use environment, and regularly inspecting and maintaining, the discoloration of the coil can be effectively delayed, and the appearance quality and performance stability of the product can be improved. At the same time, with the continuous advancement of science and technology and the continuous improvement of technology, I believe that there will be more and better ways to prevent the discoloration of plastic coils in the future.
