Cream form White Optical Whitening Agent for the Polyester

Optical Brightener Agent 199:1 liquid (CAS NO:13001-38-2)

I Technical data:
Appearance: cream white or pale yellow dispersion liquid
Shade: blue
Particle size: 90%≤2μm
PH value: 6-7
Density: 1.035±0.02
Ionicity: nonionic
II Applications:
It is mainly applicable to whitening and brightening of polyester fiber and the blends, especially to whitening of polyester fiber knitting at low-temperature (95-100℃).
III Directions for use and dosage: (only for reference)
1. Exhaust dyeing method of low-temperature absorption:
Dosage: 0.3-0.7% (o.w.f)
Liquor ratio: 1:10-20
Dyeing temperature: 95-100℃
Dyeing time: 30-40min
PH value: 4.5-5.5 (adjusted with acetic acid)
Procedure: add additive, acetic acid (adjusting PH: 4.5-5.5) and BC-103 FWA into the dye bath according to the formula, raise temperature to 95-100℃ as the rate of 2-3℃/min, keep constant temperature for 30-40min → drop in temperature → washing → dehydration and drying (80-100℃), its whiteness can meet the user’s requirement. If the user has fixing machine, carry out pre-drying (80-100℃) and curing (170-175℃, 30-40s) after washing and dehydration, then whiteness will be better.
2. Pad dyeing method:
Dosage: 1.5-4g/L
Procedure: 2 dips 2 nips (pick up: 70%) → pre-drying (100℃) → curing and thermo-fixing (175-180℃, 30 seconds)
3. High-temperature and high-pressure exhaust dyeing method:
Dosage: 0.2-0.5%(o.w.f)
Liquor ratio: 1:10-20
Dyeing temperature: 120-130℃
Dyeing time: 30-60min
PH value: 4.5-5.5 (adjusted with acetic acid)
IV Using tips
1. If suspension liquid precipitates and separates after stored for a long period, please fully stir before use.
2. It shall be used within the yellowing spot range of this product, i.e. pad dyeing ≤5g/L, exhaust dyeing ≤0.8% (o.w.f). It will be subject to yellowing if beyond the dosage range.
V Packaging and Storing:
5kg in plastic drum, 20kg/paper carton (4 drums). Quality guarantee period is 8-12 months under normal temperature.