Optical brighteners for polyester fiber
play a critical role in improving fabric whiteness, brightness, and visual appeal. Due to the hydrophobic nature of polyester and its high processing temperatures, selecting a suitable optical brightener with excellent thermal stability, light fastness, and dyeing compatibility is essential.
This advanced stilbene-based optical brightener is specially designed for
polyester fiber, triacetate fiber, and blended fabrics
, delivering brilliant whiteness with outstanding durability under demanding processing conditions.
Product Overview
Main Component
Chemical Type:
Stilbene derivative
Technical Specifications
Appearance:
Light yellow dispersion
Ionicity:
Non-ionic
Shade:
Neutral to slightly reddish
Water Solubility:
Dispersible in water
Key Performance Characteristics
Specifically formulated as
optical brighteners for polyester fiber
, triacetate fiber, and their blends
Suitable for both
exhaust dyeing
and
pad dyeing
processes
Excellent
light fastness
,
high-temperature resistance
, and
wash fastness
Stable in
hard water
, as well as under
acidic, alkaline, and peroxide
conditions
High fluorescent efficiency, delivering
brilliant whiteness at low dosage
Application Guidelines
Exhaust Dyeing Process
Dosage:
Optical Brightener ERI-L
:
0.1–0.6% (o.w.f)
Dispersant:
0.5–1 g/L
Bath Ratio:
1:10–20
pH:
5.0–6.0 (adjust with acetic acid)
Process Conditions:
Dyeing at
120–130°C for 30–60 minutes
Followed by washing → baking → final setting
Pad Dyeing Process
Dosage:
Optical Brightener ERI-L:
1–6 g/L
Other auxiliaries: as required
Process Flow:
Padding (pickup rate approx. 70%)
Pre-baking at
100°C
Baking at
180–190°C for 40–50 seconds
Note:
Thorough scouring is required if residual alkali remains on the fabric surface.
Packaging, Storage, and Transportation
Packaging:
25 kg per drum or customized packaging available
Storage:
Store at room temperature
Shelf life:
6 months
Stir well before use if stored longer than 6 months
Transportation:
Non-hazardous product
Handle and transport according to general chemical handling guidelines
Precautions for Optimal Performance
This product is a
dispersed liquid
; ensure thorough stirring before use to achieve consistent whiteness
Fully remove residual alkali from oxygen-bleached fabrics prior to whitening
Designed for
high-temperature polyester dyeing
; recommended dyeing and heat-setting temperatures must be maintained
For normal-temperature dyeing, a
carrier dyeing method
may be applied
Protect from freezing and excessive heat; sensitive to temperatures
below 0°C
and
above 40°C
At
Shandong Grand Chemical Co., Ltd.
, we specialize in producing and supplying a wide range of
high-performance
optical brighteners
for
plastics, coatings, detergents, and textiles
.
📩
Contact us
for product data sheets, samples, or technical guidance:
Email:
+86 13173009832