Fluorescent Whitening Agent VBL(FBA85/86/91)
(Awarded the title of "Quality Product" by the Ministry of Chemical Industry)
Properties: Fluorescent Whitening Agent VBL is one of the diphenylethylene bis triazine compounds and chemically called 4,4'-bis[(hydroxyethylamino-6-anilino-1,3,5-triazin-2yl)amino] diphenylethylene-2,2'-sodium disulfonate. It has an appearance of light yellow evensized powder and is soluble in soft water which is more than 80-fold in quantity.
Applications: Fluorescent Whitening Agent VBL is suitable form whitening cellulose fabric, paper and viscose product. It has a good affinity for cellulose fiber and is capable of whitening the bleached cotton fabric and brightening the light-colored or printed fabric. It is also capable of remarkably increasing the whiteness of the fabric to be dyed so as to improve its appearance. VBL can be added into soap or detergent so as not only to increase the whiteness of the soap or detergent, but also increase the whiteness of the washed fabric.
Directions for use and dosage: VBL's dosage should be proper. Overdosage will decrease the whiteness of the material treated and even make it yellow. when used for pad-dyeing, a dosage of 2~3g/l is recommended.
Specifications:
Item |
Indices |
Appearance |
white even-sized powder |
Whitening intensity |
equivalent to the 100 points of the standard agent |
Hue |
slightly different from the standard agent |
WCIE(whiteness difference between DMS and the standard agent) |
≥-3.0 |
Moisture content |
≤5% |
Content of insoluble impurities |
≤0.5% |
Fineness (quantity of residue on sieve having 180um meshes) |
≤10% |
Packaging and storing: Packaged in cardboard barrels, 25kg or 50kg each. Stored in dry room.
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