Why do blow molded products fade

Many people say that blow molded products are very good, but I have found that some people also feel that blow molded products may fade, so blow molded products have been questioned. Today, I will introduce why blow molded products fade? Resolve everyone's doubts.

The fading of blow molded products is often caused by human factors, mainly due to the following reasons:

1. Acid and alkali resistance

The fading of blow molded products is often caused by the chemical resistance of the coloring agent. For example, molybdenum chromium red is resistant to dilute acid, but it is not resistant to alkali and cadmium yellow, which seriously affects the coloring effect of the coloring agent and induces fading.

2. Heat resistance

This is very easy to understand. Heat resistance refers to the degree to which pigments change color and fade at high temperatures. For coloring agent pigments, organic pigments will change their molecular structure at high temperatures, leading to fading consequences; Inorganic pigments have relatively high heat resistance and are more stable.

3. Light resistance

Poor light resistance of colorants can directly lead to fading. Many products processed by blow molding are outdoor products, so light resistance is the first requirement. According to industry regulations, the light resistance of outdoor products should not be lower than level 6, and for internal products, level 4-5 is generally selected.

4. Antioxidant activity

Some inorganic pigments slowly fade due to the dissolution of large molecules or other modifications after oxidation, which is caused by high-temperature oxidation during production and processing, as well as oxidation caused by strong oxidants. After mixing lake, formamide color paste, and iron oxide yellow, the red color will gradually decrease.

Why do blow molded products fade? The above editor has listed several relevant factors, hoping to be helpful to you. When choosing products, try to avoid them as much as possible. If you want to know more, you can consult us online and we will be happy to serve you!