Fluorescent Whitening Agent 4BK-L

Fluorescent Whitening Agent 4BK-L is a highly effective optical brightening agent designed specifically for the textile industry. This agent excels in whitening cellulose-based fabrics, including cotton, hemp, and viscose, making it an ideal choice for manufacturers seeking to enhance the brightness of their textiles. With its violet-blue shade and impressive performance characteristics, 4BK-L plays a crucial role in achieving high-quality, visually appealing fabrics.

Key Features and Typical Benefits

1. Good Water Solubility: One of the standout features of Fluorescent Whitening Agent 4BK-L is its good water solubility. It can be dissolved in water in any ratio, making it versatile for various applications. This property is particularly beneficial for automatic feeding systems, allowing for seamless integration into production processes and ensuring consistent dosing and application.

2. Whiteness Enhancement: 4BK-L is renowned for its ability to deliver exceptional whiteness to fabrics. The brightening agent enhances the whiteness of treated textiles, giving them a vibrant and clean appearance. Its violet-blue shade contributes to the overall aesthetic appeal, making fabrics appear fresher and more inviting to consumers.

3. Good Wash Fastness: In addition to its whitening capabilities, 4BK-L exhibits good wash fastness. Fabrics treated with this agent maintain their brightness and vibrancy even after repeated laundering, ensuring long-lasting visual appeal. This durability is essential for manufacturers aiming to produce high-quality textiles that stand up to consumer use.

4. Process Adaptability: Fluorescent Whitening Agent 4BK-L demonstrates good process adaptability, making it suitable for various whitening techniques. It can be effectively used in both exhaustion and padding whitening processes, providing flexibility in application methods. This versatility allows manufacturers to choose the method that good suits their production workflow while still achieving outstanding results.

Properties

1. Physical Form: 4BK-L is available as a liquid, making it easy to handle and apply during textile processing.

2. Appearance: The agent has a dark violet-blue liquid appearance, which visually indicates its potency and effectiveness in brightening fabrics.

3. Viscosity: The viscosity of 4BK-L is less than 100 mPa.s at 25°C, which ensures smooth mixing and application in various production systems.

4. Ionic Character: This brightening agent is anionic, enhancing its compatibility with other textile auxiliaries and chemicals commonly used in textile processing.

5. Flash Point: With a flash point greater than 93°C, 4BK-L is considered safe to handle and store under standard industrial conditions.

6. Density: The density of 4BK-L at 25°C is between 1.12 and 1.22 g/cm³, contributing to its effective solubility and performance in application processes.

7. Ultraviolet Absorption: 4BK-L has an ultraviolet absorption range of 120-130 nm, enhancing its effectiveness in absorbing UV light and reflecting bright white light, thus contributing to the brightness of treated textiles.

Applications

1. Cotton Fabrics: 4BK-L is ideal for cotton textiles, where it provides significant brightness enhancement, resulting in visually appealing products that meet consumer expectations.

2. Hemp and Viscose Fabrics: The agent is also suitable for whitening hemp and viscose fibers, allowing manufacturers to expand their product offerings while maintaining high-quality standards.

3. Exhaustion and Padding Processes: 4BK-L can be effectively used in both exhaustion and padding whitening processes, providing flexibility for manufacturers to choose their preferred application method based on production needs.

Preparation and Use

1. Dilution: Due to its good water solubility, 4BK-L can be easily diluted in water to the desired concentration. 

2. Application: Once diluted, the brightening agent can be applied using automatic feeding systems for consistent and efficient results.