ZHEJIANG TRANSFAR WHYYON CHEMICAL CO.,LTD.--Fluorescent Whitening Agent,Stablizer,dyestuff,Retention,Drainage Agent,Surface Size

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Fluorescent Whitening Agent VBL

Main Chemical Composition:

Stilbene derivative

Intro:

C. I. Number:

Treating process:

1.exhausting whitening process:

VBL: 0.05-0.3% (o.w.f.), bath ratio: 1:5-30, dyeing temperature: 40°C -100°C ；

Na₂SO₄:0-10g/l.,start temperature :30°C , heating rate:1-2℃/min, keep the

temperature at 50-100°C for 20-40min, then lower to 50-30°C --> wash -->

dry( 100°C ) -->setting (120℃-150°C )×1-2 min( add proper amount

leveling agent according to the leveling effect).

2. Padding Process:

VBL:0.5-3g/l, residue liquor ratio:100%, one dip and nip -->dry( 100°C )

-->setting (120°C -150°C )×1-2 min

Specification:

Appearance:	Slight yellow powder
Fluorescent Color:	Similar to the standard sample
Whitening strength:	100±3( compared with standard sample)
Moisture:	≤5%
Fineness(80 mesh residue):	≤5%

Property:

1.With bluish violet color
2.Soluble in soft water as much as 80 times weight, 300 ppm in hard water
3.Anionic type, alkali endurable, can be used in one bath of anionic and nonionic surfactant.
4.To be unendurable ion of copper and iron, etc. Unsuitable to be used in cationic dyestuff and surfactant.

Note:

1.The information of our products is for reference only. We are not responsible for any unexpected results or patent dispute caused by it.
2.Please contact our company if you have any problems in technology or application.

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