Liquid fluorescent whitening agent VBL

Specifications: A. Appearance: light yellow transparent liquid B. Strength: standard 100% ± 2 C.pH value: 8-10.5 D. Density (20 ℃): 1.20g / cm3 ?? E. Viscosity (20 ℃) : ≤80mPa.s F. Solubility: When using miscible with water in any ratio performance and features: A. The product is stilbene triazine type derivatives, is sulfuric acid liquid whitener. B. An anionic, acid of pH: 6-11, resistance to hard water to 300ppm, resistance to free chlorine to 0.25%, intolerant of copper, iron ions. C. Shade: a blue violet fluorescence. D. has good storage stability. E. Liquid fluorescent brighteners, although a good whitening effect, but should not be used in excess, or just the opposite. Scope: applicable to pulp slurry surface sizing and whitening of the coating process to surface sizing and coating works best. Application method: A. pulping process: When fluorescent whitening in the pulp, VBL should be added before alum or cationic additives, should not be used simultaneously. For pH value 4.0-10, Dosage: 0.05-1.4% (absolute dry pulp). B. surface sizing process: capable of conventional starch, CMC, PVA and weak anionic and cationic synthetic sizing agent can be used together to achieve a good whitening effect. Reference dosage: 0.15g / L-1.2g / L. C. dye coating process: can a solution at any stage of the preparation of the coating and fitted. For pH value of 6.0-11. Dosage: 0.15-1.4% (weight of paint) and PVA, CMC, starch simultaneously with better results. Packaging and storage: 25kg / plastic barrel, 200kg / plastic barrel, it can be packaged according to the requirements of a cool, dry place away from light and avoid cationic compounds (such as aluminum sulfate, a cationic resin, etc.) Contact valid for 6 months