Fluorescent whitening agent is a colorless or light-colored organic compound that can absorb ultraviolet light that is not visible to the naked eye and reflects blue-violet light, thereby making up for the blue light absorbed by the substrate itself to achieve a whitening effect. In plastic tinting, the amount of addition is generally 0.005% to 0.02%, which is different in the specific plastic category. If the amount of addition is too large, the whitening effect of the whitening agent in the plastic will be reduced. At the same time costs increase.
The commonly used brighteners are as follows.
OB series are OB, OB-1, OB-4, OB-F, OB-16, OB-100.
OB, OB-100 is widely used in PVC, PS, PP, PE and other plastic coloring. It has good stability, excellent fluorescent whitening effect, and small amount of addition. It has become one of the commonly used fluorescent whitening agents in China. OB-1, OB-F and OB-16 are suitable for coloring plastics such as ABS, PS, HIPS, PA, PC, PP, EVA and rigid PVC. OB-4 is especially suitable for PVC and polyethylene series products. It is a high-purity whitening agent. It can also be used in PS, PP, PE and other plastics.
KCB is mainly used for the whitening of synthetic fibers and plastic products. It has obvious brightening effect on colored plastic products. ABS and other plastics.
KSN is suitable for all plastics. It has the characteristics of small dosage and good effect. It is a very good variety in the whitening agent market.