Fluorescing whitening agents 4BI

Chemical name: Stilbene derivative
Structural formula:
Specification Appearance: Grey powder
Fluorescent Color: Slight red
Whitening strength: 100±3(compared with standard sample)
Moisture: ≤6%
Ionic character: anionic

Treating process:
1. Exhausting whitening process:
    4BI: 0.05-0.8% (o.w.f),
    bath ratio: 1:30,
    dyeing temperature: 40°C-100°C;
    Na₂SO₄: 0-10g/l.,
    start temperature: 30°C,
    heating rate: 1-2°C/min,
    keep the temperature at 50-100 for 20-40min, then lower to 50-30°C →
    wash → dry(100°C) → setting(120°C-150°C)×1-2min(add proper amount leveling agent
    according to the leveling effect).

2. Padding Process:
   4BI: 0.5-5g/l,
   residue liquor ratio: 100%,
   one dip and nip → dry(100°C) → setting(120°C-150°C)×1-2min

Use: Mainly be used as brightener of contton, linen, silk, polyamide fiber, wool and paper.

Package: It is packed in 20kgs paper board bucket. It can be packed according to the requirement of the user.

Note: It needs to be declared that the above data is 4BIsed on our present knowledge and experience; owing to too many affecting factors, these data cannot be free from their check and test when processing and using the product.

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