Fluorescent whitening agent CL-L

Optical brightener CL is a high-performance yellow liquid that is a triazole stilbene derivative. It is anionic in nature and is known for its neutral tone, which is comparable to similar products such as Uvitex CLE (Baver). It is designed to enhance the brightness and whiteness of various fibers and is an important ingredient in textile processing.

Features:
1. Fastness
- Elastic nylon: Optical brightener CL is particularly effective on nylon fibers, especially elastic nylon. It has good fastness properties, ensuring that the whiteness and brightness of the fabric remain unchanged even under harsh conditions.
- Lightfastness: This additive has good lightfastness and is ideal for applications where fabrics need to withstand sunlight. It maintains lightfastness above level 5, ensuring long-lasting brightness.
- Stability under harsh conditions: Optical brightener CL is stable against chlorite compounds, sea water and high temperatures, making it suitable for use in a variety of environments.
- Hard water resistance: Even in hard water conditions, it exhibits strong stability and fastness, ensuring consistent results under different water qualities.
2. Compatibility with cellulose fibers
- pH-sensitive applications: The additive is also suitable for cellulose fibers when used in environments with pH values ​​below 9. It ensures that the fiber reaches a high whiteness without affecting the integrity of the fabric.

Product application:
1. Nylon processing
- Batch processing: It can be used in bisulfite bath and sodium chlorite bath to ensure uniform whitening of nylon fabrics. It offers flexibility in dosage and processing conditions to accommodate various production needs.
- Pad dyeing process: This agent is also very effective in the pad dyeing process of nylon. By using the correct dosage and leveling and fixing agents, manufacturers can achieve an even whitening effect. The drying process at a temperature of 105-120°C ensures adequate fixation of the agent on the fibers.
2. Cotton exhaust process
- Cotton whitening: The fluorescent whitening agent CL can be used in the cotton exhaust process to provide efficient whitening for cotton fibers. The brightener is compatible with sodium sulfate and fixatives, ensuring ideal results with short processing times.

How to use:
1. Nylon batch process
- Bisulfite bath:
Dosage: 0.5-1.5% (o.w.f)
Bisulfite 2-3 g/L
Detergent: 0.5-1.0 g/L
pH value: 4-5 (adjusted with formic acid)
Liquid ratio: 1:10-20
Temperature × time: 95-100℃ × 30-40 minutes

- Sodium chlorite bath:
Dosage 0.5-1.5% (o.w.f)
Sodium chlorite 3-8 g/L
Sodium nitrate 1 g/L
Detergent: 0.5-1.0 g/L
Stabilizer 0.5-1.0 g/L
pH value: 3-4 (adjusted with formic acid)
Liquid ratio: 1:10-20
Temperature × time: 95-100℃ × 30-40 minutes

2. Nylon pad dyeing process
- Dosage: 10-20g/L 10-20 g/L
- Leveling agent: 1-2 g/L
- Hardener: 5-10 g/L
- Pickup rate 60%-80%
- Drying 105-120℃

3. Cotton discharge process
- Dosage 0.2-1.5% (o.w.f)
- Sodium sulfate: 2-5 g/L
- Fixing agent: 5-10 g/L
- Liquid ratio: 1:10-20
- Temperature × time: 80-100℃ × 30-40 minutes

Package:
Fluorescent whitening agent CL is packed in 25kg PE barrels, and the packaging can also be customized according to customer requirements to ensure that it meets the packaging needs of different industries.
The above introduces the main characteristics, diverse application scenarios and efficient use methods of optical brightener CL. Fluorescent whitening agent CL has become an essential product in the textile industry to achieve whitening effects.