Fluorescent Whitening Agent ER-II

Fluorescent Whitening Agent ER-II, also known as Brightener ER-II, is a high-performance optical brightening agent designed to enhance the appearance of polyester textiles and their blends. As a bisstyrene derivative, it effectively imparts a bright white appearance to fabrics, ensuring good whiteness with a low dosage requirement. The product is especially suited for polyester and acetate fiber, providing a brilliant, pure bright shade that is long-lasting and resistant to fading. Its high whiteness effect and compatibility with various application methods make it an essential component for textile manufacturing processes that demand outstanding visual appeal.

Key Features
1. High Whiteness: 
- Fluorescent Whitening Agent ER-II provides exceptional whitening performance, offering a clean, bright appearance to polyester and its blended fabrics. It is designed to achieve good results with minimal dosage, ensuring cost-effective application without compromising on whiteness.
   
2. Low Dosage Requirement: 
- Brightener ER-II requires only a small amount to deliver its brightening effects. This makes it an economical option for textile manufacturers who seek high-quality results with efficient use of materials.

3. Pure Bright Shade: 
- The optical brightener is formulated to provide a pure, bright shade of whiteness, ensuring that textiles have a visually appealing and uniform appearance across the entire fabric.

Applications
1. Polyester Textiles: 
- Fluorescent Whitening Agent ER-II is primarily used for whitening and brightening polyester textiles. It is ideal for achieving a high level of whiteness in polyester fabrics, enhancing their overall aesthetic appeal.
   
2. Polyester Blended Fabrics: 
- Brightener ER-II is also suitable for use with polyester blends, allowing manufacturers to enhance the whiteness of fabrics that contain polyester in combination with other fibers.
   
3. Acetate Fiber: 
- The product is effective in brightening acetate fiber, delivering good whiteness to this specific type of textile material, ensuring consistency and vibrancy.

Operating and Safety Instructions

1. Shake Well Before Use: It is recommended to shake the product thoroughly before use to ensure uniformity.
   
2. Accurate Weighing and Dilution: For accurate preparation, the solution should be weighed and diluted separately. This ensures consistent performance during the application process.

3. Use Soft Water: Soft water is strongly recommended for dilution to avoid potential interference with the brightening agent's effectiveness. If soft water is not available, a preliminary test is necessary to ensure compatibility.

Packaging and Shelf Life
1. Package: Fluorescent Whitening Agent ER-II is supplied in a package of four 5 kg plastic bottles, with a total net weight of 20 kg per cardboard box. This packaging ensures ease of transport and storage.

2. Shelf Life: The product has a shelf life of 6 months when stored in a dry, cool, and ventilated environment. Proper storage is essential to maintaining its effectiveness over time.

Application Processes
1. Pad-Dyeing Thermosol Process
   - Dosage: 1.0 - 5.0 g/L
   - Process: Dipping and padding twice with a pick-up ratio of 70%, followed by pre-curing at 100°C and curing at 180-200°C for 20-30 seconds.
   - Attention: Ensure thorough rinsing of the fabric after pre-treatment to remove any residual alkali, which could lead to color fluctuations.

2. Dip-Dyeing Process
   - Dosage: 0.1 - 0.5% (on weight of fabric)
   - Bath Ratio: 1:10 - 1:30
   - Temperature: 100 - 135°C
   - Time: 30 - 60 minutes
   - pH: 6 - 13
   - Notice: The specific process should be adjusted based on preliminary trials to optimize results.