Main Ingredients: Stilbene derivates Physical Chemical Properties: Appearance: Straw yellow or yellow even powder Tone: Bluish tone Moisture: ≤ 5% Fineness (screenings after sieving through 250micron pores): ≤ 10%
Performance Features: 1. The agent has blue purple fluorescence. 2. It's anionic and its solubility in water is moderate. 3. It has good fastness to acid. Scope of Application: 1. Good fluorescent whitening performance in the pulp. 2. Good fluorescent whitening performance during surface sizing. 3. Good fluorescent whitening performance during water-solubility coating.
Application Methods: 1. When it is used in fluorescent whitening in the pulp, VBL should be added in before alum or cationic auxiliaries, but not be used together with those. Usage: The proportion between VBL and absolute dry weight of paper pulp is 0.05~ 0.3%. 2. When it is used in fluorescent whitening during surface sizing, it can be used together with CMC, PVA, starch and anionic or weak-cationic synthetic sizing agents. 3. When it is used in fluorescent whitening during coating, it can be mixed in at any stage during the preparation of the coatings in the form of dilute solution. Normal usage: 0.05~ 0.3% of absolute dry weight of fillers. Packing Storage: The product is packed in 25kg or 50kg cardboard tanks, and lined with plastic bag. It should be stored at the cool, shady and dry places with protection from light.
Attentions: 1. The product data is for reference only. If you have any technical or usage problems, please call us. 2. The oral or written technical suggestions offered by our company are all sincere. But the consumers have the responsibility to experiment with our products to judge whether they are suitable for the present process. As the process for using the products is beyond our control, the consumers will take the consequences.