Compounding is an important part of plastic waste recycling. The commonly used recycled materials include woven bags, beverage bottles, films, foams etc. Due to the different levels of impurities contained in the returned material, the granules produced are yellow and not white, which is a problem for the compound factories. Here are some useful points for choosing the right whitening agent.
To choose the optical brightener with high weather resistance. Many plastic products are very easy to age. The outdoor PVC banners for advertisements, windows and profiles, pipes and fittings etc used at home are all plastic products. For these outdoor plastic products, it is easy to yellow and age. In order to maintain its bright color, the plastic optical brightening agent must have weather resistance.
To choose high-purity optical brightener. High purity means high fluorescence efficiency. Sometimes because of the presence of a small amount of impurities, the whitening effect will be greatly reduced.
To choose the FDA compliant optical brightener. In daily life, plastic products are often used for food package or direct contact with the human body. Thus the Optical brightener used must meet FDA standards.
Oribrite Optical brighteners are factory direct supply. It has made a brand reputation for more than 10 years. The purity and quality of the products are guaranteed. With less dosage it can save production costs for plastic manufacturers. The weather resistance can reach grade 6 or above, preventing the problem of yellowing in the later stage of the product. We have a professional service team, they will provide customized products for different applications.
