Fluorescent whitening agent ER-I

Optical Brightener ER-I is a highly advanced optical brightener used to improve the brightness and whiteness of polyester and polyester blend fabrics (including acetate). Its slightly bluish-purple hue makes it visually appealing and a must-have for the textile dyeing industry. This product is of particular interest due to its good dry heat fastness and versatile application methods.

Product application:
1. Polyester fabric:
- Improves the brightness and whiteness of polyester and polyester blend fabrics.
- Suitable for polyester-cotton, polyester and other blended fabrics.

2. Textile finishing:
- Ideal for enhancing aesthetics during dyeing, pad dyeing and finishing processes.
- Compatible with high temperature and high pressure impregnation methods.

3. Synthetic fibers:
- Can effectively whiten various synthetic fibers and improve visual quality.

Advantages of optical brightener ER-I:
1. High whiteness:
- Produces bright white color with blue-violet fluorescence.
- Can significantly improve fabric brightness.

2. Good fastness:
- Provides long-lasting brightness that is washable, lightfast, and heat-resistant.
- Maintains whiteness for a long time even at different temperatures.

3. Good dyeing performance:
- Ensures even whitening and no streaks.
- Has good floating and leveling properties.

Features:
1. High fluorescence:
- Can produce blue-violet fluorescence effect and improve the overall brightness of the fabric.

2. Multiple application methods:
- Suitable for various dyeing processes, including exhaust method and continuous method.
- Suitable for alkaline and neutral baths.

3. Wide range of applications:
- Suitable for polyester, blends and synthetic fibers.
- Enhances fabrics for clothing, home textiles and industrial applications.

Fluorescent whitening agent ER-I Instructions for use:
1. Filling hot melt method:
- Dosage: 0.5-1.5 g/L
- Process: twice padding (70% liquid extraction) → pre-drying (100℃) → baking (180-190℃ 30-40 seconds).

2. High temperature and high pressure impregnation method:
- Dosage: 0.2-0.5% (o.w.f)
- Liquor ratio: 1:10-30
- Dyeing temperature 120-135℃
- Dyeing time: 30-60 minutes
- PH value: 6-13.

3. Low-temperature adsorption and high-temperature fixation impregnation method:
- Dosage: 0.5-1.0% (o.w.f)
- Liquor ratio: 1:10-20
- Dyeing temperature 50-60℃
- Dyeing time: 30 minutes
- pH value: 4.5-5.5 (adjusted with acetic acid).
- Process flow: Mix with additives and follow appropriate heating and fixation steps.

Optical brightener ER-I is an important tool for textile dyeing, ensuring bright and long-lasting whiteness of all types of fabrics. Its good performance and versatility make it an indispensable tool for achieving textile finishing.