Description
Optical brightener DT for polyester
Main ingredient: stilbene derivative
Specification
| Appearance | Light yellow slurry |
| Shade | Reddish blue |
| Solid content | ≥2.0 |
| PH (1& aq.sol) | 7.0±1.0 |
Characteristics
Milling with pure PF powder. Water – insoluble, can be diluted with any multiple of water. Excellent resistance with hard water, acid and alkali. Can withstand 160℃ baking. Excellent washing fastness, sunlight fastness and sublimation fastness.
Application
Pad-dyeing hot-melt method
Rate of use: 0-30g/L
Process: two-bath two-pad (pick -up rate 70% )→pre-baking (100℃)→setting (180-190℃, 20-30s)
Note: Scouring is required before dyeing to remove alkali residue.
High-temperature exhaust dyeing method
Rate of use: 1-3% ( q.w.f); bath ratio: 1:10-30;
Dyeing temperature: 80-130℃, 30-45min.
PH: 5-10
Packaging & storage
25kg per plastic drums
6 months storage at room temperature.
Precaution
Setting temperature is optimum at 180-190℃
Fabrics must be washed to remove alkali after alkali bath.
High dye bath temperature is preferred for better whiteness.
