PP plastic is also polypropylene plastic. It is a non-polar polymer with linear structure formed by free radical polymerization of propylene monomer. It is one of the five general-purpose plastics and has a wide range of applications. PP injection products are the most expensive products among PP plastic products. Any plastic products are inseparable from the processing of additives. PP injection fluorescent brightener is an important auxiliary in the production process of PP injection products.
PP plastic has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, so it is widely used in many fields. However, due to market reasons, manufacturers will use recycled plastics to reduce costs, and injection products made directly from recycled PP plastics are difficult to meet user needs. Therefore, the emergence of optical brighteners solves this problem.
Fluorescent brighteners can increase the whiteness and brightness of PP plastic products by using their ability to absorb ultraviolet light, effectively improve the yellowing of PP recycled plastics, and improve the weather resistance of the products.
In the injection molding process of PP injection products, many procedures and conditions are needed to make finished products. Therefore, it is very important to choose the optical brightener, and it should not affect its processing technology. In addition, because the processing temperature of PP injection molded products is carried out from high temperature, usually the temperature is 170-220℃, so the fluorescent brightening agent also needs to meet the high temperature production Requirements.
In summary, Raytop Chemical recommends the use of optical brightener OB-1, which is a bright yellow-green crystalline powder with a melting point of up to 360°C. The addition amount used in PP plastic injection molding is only about 200-300g. For manufacturers that produce recycled materials, this cost is directly negligible, but the profits to the manufacturers are very considerable.