The full name of PS is polystyrene, which is a thermoplastic resin. Its raw materials are made of commonly used resins. Because of its very low melting point and relatively low production cost, this plastic has applications in many industries, such as building materials, electronic parts, auto parts, etc. Because ps plastic has good light transmission, ps plastic can also be used for lampshades. It should be noted that ps plastic is prone to deformation if it encounters high temperatures, so ps plastic is not suitable for use in high temperature environments.
The production of ps plastic particles is generally divided into five processes.
Recycling used materials are classified. There are many types of plastic products. In order to ensure the quality of the particles, the used materials should be classified.
Clean the larger impurities in the old plastic.
Crush the old plastic for cleaning.
Plasticizing extrusion, wire drawing, pelletizing and packaging. If the material is recycled, the impurities will be large. Generally, cleaning will not achieve good results, but the impurities on the surface of the waste plastics are cleaned, and some can not even be cleaned, resulting in insufficient whiteness and dullness of the produced ps plastic particles. Yellow, at this time, you need to add fluorescent whitening agent to increase the whiteness, brightness, and vividness of the product. So what kind of Optical Brighteners should ps plastic use? Of course, it is the Optical Brightener OB.
roduct Cate：Optical Brightening Agent For Plastic
Product Name：Optical Brightening Agent OB
Chemical Name：2,5'-Bis[2-(5-tert-buty l-2 benzoxazoly)thiophene
Appearance:slight greenish yellow powder
Uses：Mainly be used in whitening of thermoplastic, polyvinyl chloride(PVC), polypropylene(PP), polyester fiber, paint and ink, etc.