Analysis of the Reasons for the Color Change of Plastic Bin

Why does the plastic bin change color? The color of the part box fades after a period of time, which is caused by the aging or degradation of the material. Usually the color yellowing is due to aging (degradation), because the existence of polypropylene upper side group, its stability is not good, especially in the light condition. Usually participates in light stabilizers. As for PE, because there is no side base, there are not many yellowing conditions in the early stage of processing or application. PVC will turn yellow, which has a great relationship with the formulation of the product.

The reason for the original whitening is oxidation. Some parts have simple oxidation on the surface of the box material, so it is necessary to treat the master material.

In addition to the harmful additives and impurities in the system, mainly caused by aging, adding appropriate antioxidant system and anti-ultraviolet agent can improve the yellowing of PE and PP, but many hindered phenolic antioxidant system itself will bring slight yellowing, and some antioxidant systems and anti-ultraviolet agents have resistance effect, so we should be careful when using them. Participating in the polymer lubricant mainly makes it form a movable polymer fluoropolymer film on the machine wall, improves the extrusion processing function, extrusion pressure and processing temperature of polyolefin resin, improves product quality and productivity, reduces production cost, reduces or eliminates melt rupture, and reduces the waste rate of parts box.