Fluorescent Whitening Agent ER-I

Fluorescent Whitening Agent ER-I, also known as BRIGHTENER ER-Ⅰ, is a highly advanced fluorescent whitening agent designed to enhance the brightness and whiteness of polyester and polyester-blended textiles, including acetate fibers. Its slightly bluish-violet shade delivers exceptional visual appeal, making it essential in the textile dyeing industry. This product is particularly noted for its good fastness to dry heat and versatility in application methods.

Applications of Fluorescent Whitening Agent ER-I

1. Polyester Fabrics:
   - Boosts brightness and whiteness of 100% polyester and polyester blends.
   - Suitable for blends like polyester-cotton, polyester-silk, and more.

2. Textile Finishing:
   - Ideal for improving aesthetic appeal in dyeing, padding, and finishing processes.
   - Compatible with high-temperature, high-pressure dipping methods.

3. Synthetic Fibers:
   - Effective in whitening various synthetic fibers, enhancing visual quality.

Advantages of Fluorescent Whitening Agent ER-I

1. High Whiteness:
   - Produces a brilliant white with a blue-violet fluorescence.
   - Significantly enhances fabric brightness.

2. Excellent Fastness:
   - Provides long-lasting brightness resistant to washing, light, and heat.
   - Maintains whiteness over time, even under varying temperatures.

3. Good Dyeing Performance:
   - Ensures uniform whitening without streaks.
   - Offers good uplift and leveling properties.

Key Features of Fluorescent Whitening Agent ER-I

1. High Fluorescence:
   - Imparts a luminous blue-violet effect, enhancing overall fabric brightness.

2. Versatile Application Methods:
   - Applicable in various dyeing processes, including exhaust and continuous methods.
   - Suitable for both alkaline and neutral baths.

3. Wide Range of Applications:
   - Effective for polyester, blends, and synthetic fibers.
   - Enhances fabrics used in apparel, home textiles, and industrial applications.

Usage Instructions for Fluorescent Whitening Agent ER-I

1. Padding Hot Melt Method:
   - Dosage: 1.5–3 g/L
   - Process: Two dips and paddings (70% liquor pick-up) → pre-dry (100℃) → bake (180-190℃ for 30-40 seconds).

2. High-Temperature High-Pressure Dipping Method:
   - Dosage: 0.2–0.5% (o.w.f)
   - Bath Ratio: 1:10–20
   - Dyeing Temperature: 120–130℃
   - Dyeing Time: 30–60 minutes
   - pH Value: 4.5–5.5 (adjust with acetic acid).

3. Low-Temperature Adsorption High-Temperature Fixation Dipping Method:
   - Dosage: 0.5–1.0% (o.w.f)
   - Bath Ratio: 1:10–20
   - Dyeing Temperature: 50–60℃
   - Dyeing Time: 30 minutes
   - pH Value: 4.5–5.5 (adjust with acetic acid).
   - Process: Combine with additives and follow appropriate heating and fixing steps.

Fluorescent Whitening Agent ER-I stands out as an essential tool in textile dyeing, ensuring vibrant, long-lasting whiteness across a variety of fabric types. Its good performance and versatility make it indispensable for achieving high-quality textile finishes.