The recommended proportion of fluorescent whitening agent is 0.02%-0.05%, that is, 200-500g per ton of material. The use ratio and effect of fluorescent whitening agent is a sine wave curve. The most appropriate use ratio has the best whiteness. If the ratio is too low or too high, it will cause insufficient whiteness or darkening and yellowing. Regarding the proportion of fluorescent whitening agent used, experience is very important. The amount of new material added will be relatively small. If the material is returned, more can be added as appropriate. The proportion of different fluorescent whitening agents used will be different. Subang recommends that you can determine it through sample experiments. The key is to find the saturation point. Next, Subang collected the proportions of some conventional brighteners for your reference.
Fluorescent whitening agent OB usage ratio：
PVC white is: 0.01%~0.05%, transparent is 0.0001%~0.001%
PS white is: about 0.001%, transparent is 0.0001%~0.001%
ABS color is: 0.01%~0.05%, white is 0.01%~0.05%
PE, PP colorless is 0.0005%~0.001%, white is 0.005%~0.05%
The above aspects are for reference only, and the specific application needs to be tested before deciding. The optimal dosage of optical brightener OB depends on the compatibility between it and the polymer. Too high dosage of brightener will cause incompatibility and migration.
Fluorescent whitening agent OB-1 usage ratio：
The general dosage of white plastic is 0.01%~0.03%, and it can also be made into concentrated color masterbatch with a content of 1%~10%, and then used for product processing according to the addition ratio.
The use ratio of fluorescent whitening agent FP-127：
PVC white: 0.01%~0.05%, transparent: 0.0001%~0.001%
Polystyrene white: 0.001%~0.05%, transparent: 0.0001%~0.001%
ABS is: 0.01%~0.05%, which can eliminate the inherent yellow of ABS.
The proportion of fluorescent whitening agent KCB used：
In PE, PVC, PS, ABS, EVA foam products, the general dosage is about 0.01%~0.03%, and users can make appropriate adjustments according to product requirements. The dosage of light-converting transparent agricultural film is 0.0005%~0.002%. When adding any UV absorber to the polymer, care should be taken to properly adjust the amount of fluorescent whitening agent.
Fluorescent whitening agent KSN usage ratio：
Add 0.002%~0.03% to ordinary plastics; add 0.0005%~0.002% to transparent plastics; add 0.01%~0.02% to polyester resins.
Post time: May-25-2022