optical brightener NFW 450 liquid cas no.27344-41-8 bluish tone purity 20% for acylic wool nylon etc

FLUORESCENT BRIGHTENER NFW LIQUID

1. Composition

Composed of derivatives of distyrene and synergist

2. Properties:

Appearance: Deep blue-violet liquid

PH value: 7-9

Colored light: blue light

Proportion: 1.060±0.005

Ionic type: Negative ion

Solid content:≥30%

Temperature resistant type: non-freezing at -18℃,even if there is a few of ice scraps, it will not affect the using effect after thawing.

3. Application and usage:

Purpose: this product is mainly used for the whitening and brightening of polyamide fabric, which can also be used for the whitening of wool, silk, cellulose acetate fiber, cellulose triacetate and cotton fibre.

Usuage:

1) exhaust dyeing:

Use quantity:0.2-5%(o.w.f)

Optimum use quantity:0.5-1.5%(o.w.f)

PH value: 5.5-6.0(adjustable with citric acid or acetic acid)

The bath ratio is 1:10-1:20

dyeing temperature is 80-100℃

the dyeing time is 30-40min.

1. pad-dyeing hot melt method:

   Use quantity: 1.5-10g/l(based on actural test dosage of sample dyeing from user )

   Process flow: two dip dyeing and two pad dyeing( or one dip dyeing and one pad dyeing), mangle expression 60-70%→pre-dyeing(100℃)→curing and setting(160-170℃,40-60s)

2. low temperature absorption and high temperature color development method:

   Use quantity: 0.5-1.2%(o.w.f)

   PH value:5.5-6.0 (adjusted with citric acid or acetic acid)

   The bath ratio is 1:10-1:20,

   the dyeing temperature is 50-60℃

   the dyeing time is 20-30min.

   Process flow: add NFW liquid and sodium hydrosulfite(o.w.f) and fabric into the dye bath at normal temperature and adjust PH value to be 6.0 →increase temperature to 50℃,dye for 20-30 min→washing→dehydration and pre-dyeing (100℃)→setting and baking(180-190℃,30-40s)

1. Package and shelf life:

   25kg or 50kg or 200kg plastic bucket. The shelf life is not more than 6 months at room temperature.