ABS plastic pellets are a common engineering plastic with excellent wear resistance and chemical resistance, widely used in fields such as home appliances, electronics, and automobiles. However, some users have reported that ABS plastic pellets may turn yellow after a period of use, affecting their aesthetic appeal. So, why do ABS plastic pellets turn yellow after being stored for a long time?
According to analysis, the main reasons for the yellowing of ABS plastic particle products are as follows:
1. Light and oxidation effects
Long term exposure of ABS plastic pellets to sunlight or reaction with oxygen in the air can cause oxidation reactions, resulting in yellowing of the plastic surface. This is because the styrene monomer in ABS plastic is easily absorbed and oxidized by oxygen molecules, causing the plastic surface to turn yellow.
2. Changes in additives
During the production process of ABS plastic pellets, various additives such as stabilizers, antioxidants, UV blockers, etc. are added. These additives will be affected by mechanical action, acidity and alkalinity, and other factors, leading to the yellowing of ABS plastic particle products.
3. The impact of production processes
Different production processes can have an impact on the quality of ABS plastic pellet products, such as temperature, pressure, and uniformity of material mixing. If the production process is improper, it may lead to a decrease in the quality of ABS plastic particle products and the appearance of yellowing on the surface.
4. Impact of usage environment
The environment in which ABS plastic pellets are used is also one of the factors that affect their yellowing. Environmental conditions such as high temperature, humidity, and high acidity/alkalinity can accelerate the oxidation reaction and fading of ABS plastic particles.
Regarding the above aspects, the following measures can be taken to prevent ABS plastic pellet products from turning yellow:
1. During storage and use, try to avoid prolonged exposure to sunlight or high temperatures, humidity, and other environments.
2. Choose high-quality ABS plastic pellets and ensure that the additives added during the production process are stable, balanced, and proportioned correctly.
3. Pay attention to the production process flow, control parameters such as temperature, time, and pressure to ensure product quality.
In short, there are many reasons why ABS plastic particle products turn yellow, but as long as the above measures are followed, the occurrence of yellowing can be effectively prevented and slowed down, and the quality and service life of the product can be improved