industry applications



Due to the characteristic of heat-moldability, plastics have found widespread applications in various fields such as construction, transportation, office supplies, packaging, clothing, children's playgrounds, and even in concealed areas like water pipes or underground wiring. In the past, plastics were often perceived as weaker compared to metals or challenging to process relative to wood. However, with the invention of some functional additives, such as antioxidants and UV stabilizers, there is now a broader acceptance of the use of plastics.

Antioxidants and UV stabilizers are two common types of functional additives used in plastics. Their primary purpose is to effectively inhibit the generation and activity of free radicals in plastic products, particularly during thermal processing or prolonged exposure to high-temperature environments. These additives enhance the weather resistance and long-term performance of plastics.

🔹 Antioxidants:

Based on the different principles of antioxidant action, they are mainly classified into primary antioxidants, and secondary antioxidants. Antioxidants effectively inhibit the generation and activity of free radicals in plastic products. These free radicals are typically produced by plastics under external stimuli such as oxygen, ultraviolet light, or high temperatures, triggering a chain oxidation reaction, thereby accelerating the degradation process of plastics. This degradation may manifest as discoloration, hardening, cracking, and other phenomena.


🔹 UV Stabilizers:

Plastic products used outdoors are susceptible to the effects of photooxidation reactions, leading to degradation and issues such as yellowing or deterioration of mechanical properties, similar to the overall degradation induced by heat. In such cases, ultraviolet stabilizers, including ultraviolet absorbers (UVA) and hindered amine light stabilizers (HALS), are considered effective additives. UV absorbers can block high-energy ultraviolet radiation, while HALS acts as a free radical scavenger.

When plastic products are manufactured in black, white, or various colors, there is no need for UV absorbers. In such cases, pigments or fillers such as carbon black or titanium dioxide can block UV penetration, eliminating the need for additional UV absorbers. However, due to the chemical nature of HALS, it can effectively eliminate harmful free radicals and regenerate under environmental conditions.

In choosing UV absorbers, a wide range of options is available, including traditional Benzophenone and Benzotriazoles to Hydroxyphenyl Triazines and other chemical categories. These options provide different UV absorption ranges, melting points, thermal stability, compatibility, and also consider factors like regulatory safety.


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