How to prevent the yellowing of PVC film？

In recent years, the application of decorative materials in the custom home industry has tended to diversify. Various decorative materials are affected by the environment during use, which can cause irreversible damage such as yellowing, fading, pulverization, and cracking, resulting in a shortened service life. The yellowing of decorative materials is a relatively obvious phenomenon, which not only reduces the aesthetic level of the product, but also affects its performance. Studying the yellowing of decorative materials is of great significance.

Various types of decorative materials are applied in different situations and have varying sensitivity to certain factors.

Therefore, it is necessary to take different measures to prevent yellowing during the material production and processing process according to different usage conditions.

1.Prevent the influence of light. According to the material characteristics, light stabilizers can be added, such as ultraviolet absorbers, light shielding agents, quenching agents, and free radical trapping agents, to prevent material molecules from coming into contact with ultraviolet light and storing it at a certain energy value, leading to degradation reactions.

2. Prevent the impact of oxygen. The main function of adding main and auxiliary antioxidants is to reduce the number of unstable free radicals, thereby achieving the goal of inhibiting the occurrence of oxidative degradation reactions in materials.

3.Prevent the effects of heat. Add plasticizers to enhance the plasticity of materials, prevent thermal degradation of materials at high or low temperatures, and cause changes in material properties.

4.Prevent the impact of water. Under acidic or alkaline conditions, high polymers such as polyester, acetals, and polysaccharides can undergo hydrolysis reactions when they encounter water molecules. In order to prevent such situations, the main methods currently used are to strictly dry the material before processing, or to cover the surface with a waterproof film to prevent water molecules from entering the interior of the material.

If furniture products need to be placed in an environment exposed to sunlight, they can choose weather resistant powder spraying, EB coating,  PP film veneer , decorative paper, impregnated paper with good weather resistance, or add weather resistant additives to the raw materials to improve their weather resistance and extend their service life.