I. Compound and Synergistic Application Category
 
1. Can KSN be compounded with other whitening agents? What precautions should be taken?
 
KSN can be compounded with OB-1 and KCB (to adjust color tone/reduce costs), but three points must be noted: control the temperature (based on the lower limit of heat resistance), limit the total amount (≤0.05% to prevent fluorescence quenching), and conduct a small-scale test first (start with a 1:1 ratio to adjust color tone).
 
2. When used together with fillers, how to avoid whiteness masking?
 
Select fillers with whiteness ≥95%, and for every 10% increase in filler content, increase KSN dosage by 0.005%-0.01% simultaneously.
 
II. Special Process and Performance Impact Category
 
1. How to ensure the effect in low-temperature injection molding (180-220℃)?
 
Premix KSN with carrier resin at a 1:10 ratio to make masterbatch, then extend the pressure-holding time by 10%-15%.
 
2. Will it affect the aging resistance of products? Is it easy to fail in outdoor use?
 
It does not affect the aging resistance at normal dosage and can even protect the resin; for outdoor use, it is necessary to match with HALS light stabilizers, and the product thickness is recommended to be ≥1mm.
 
III. Abnormal Problem Diagnosis and Solution Category
 
1. If dispersion issues are ruled out, why do fluorescent spots still appear?
 
Check if the raw materials contain low-melting-point impurities (replace with pure new materials) or if there is residual color masterbatch in the equipment (flush with PE material 3-5 times).
 
2. If there is no moisture absorption but whiteness decreases, what is the reason?
 
It is mostly due to hidden oxidation; it is necessary to replace with aluminum foil vacuum packaging or keep the storage area away from chemical pollution sources.