Fluorescent Whitening Agent APC (4-sulfonic acid)

Fluorescent Whitening Agent APC (4-sulfonic acid) is a highly effective fluorescent whitening agent widely used in the paper industry. This chemical compound enhances the brightness and whiteness of paper, providing a visually appealing and high-quality product. With good water solubility, resistance to hard water, and stability against bleaching agents, Fluorescent Whitening Agent APC (4-sulfonic acid) is a preferred choice for various applications in the paper production process.

Product Applications

1. Brightening Cotton and Viscose Fibers:
   - Fluorescent Whitening Agent APC (4-sulfonic acid) is used to enhance the whiteness of cotton and viscose fibers.
   - This application is particularly important in the production of high-quality paper where fiber brightness significantly impacts the final product's appearance.

2. Incorporation in Discharge Printing Pastes:
   - The brightener is ideal for use in discharge printing pastes, where it helps achieve brilliant white designs.
   - It ensures consistent and sharp patterns, enhancing the overall quality of printed paper products.

3. Fluorescent Whitening in Pulp:
   - Fluorescent Whitening Agent APC (4-sulfonic acid) is added to the pulp during the paper-making process to achieve a uniform brightening effect.
   - This method ensures that the paper has a consistent whiteness throughout its structure.

4. Surface Sizing Fluorescent Whitening:
   - During the surface sizing process, Fluorescent Whitening Agent APC (4-sulfonic acid) can be applied to enhance the paper’s surface brightness.
   - This technique improves the paper’s visual appeal without affecting its structural properties.

5. Fluorescent Whitening in Coating Processes:
   - The brightener can be used during the coating process to achieve a high degree of whiteness on the paper’s surface.
   - This application is particularly useful for coated paper types, such as glossy and matte finishes, ensuring a premium look.

Product Advantages

1. good Water Solubility:
   - Fluorescent Whitening Agent APC (4-sulfonic acid) dissolves well in water, facilitating easy integration into various paper-making processes.
   - This solubility ensures uniform distribution throughout the paper, enhancing the overall whiteness.

2. Resistance to Hard Water:
   - Unlike many brighteners, Fluorescent Whitening Agent APC (4-sulfonic acid) is not affected by hard water containing calcium (Ca2+) and magnesium (Mg2+) ions.
   - This property ensures consistent performance in different water conditions, making it a reliable choice for paper manufacturers.

3. Stability Against Bleaching Agents:
   - The brightener demonstrates good stability against bleaching agents, including those containing reducing agents like sodium dithionite.
   - This stability ensures that the brightening effect is maintained even in the presence of these chemicals.

4. Optimal Performance in Alkaline Conditions:
   - While Fluorescent Whitening Agent APC (4-sulfonic acid) is generally acid-resistant, it performs good under slightly alkaline conditions (pH > 7).
   - This makes it particularly suitable for paper processes that operate within this pH range.

Product Features

1. High Water Solubility:
   - Its good solubility in water ensures easy application and uniform distribution in the paper-making process.
   - This feature enhances the efficiency and effectiveness of the brightening process.

2. Insensitive to Hard Water:
   - The brightener's performance is unaffected by the presence of hard water ions such as Ca2+ and Mg2+.
   - This insensitivity ensures consistent results across various water qualities.

3. Optimal Alkaline Performance:
   - The brightener works good in conditions where the pH is greater than 7.
   - This characteristic aligns with many paper production environments, enhancing its applicability.

Usage Instructions

For good results, the following usage method is recommended for Fluorescent Whitening Agent APC (4-sulfonic acid):

1. Padding Process:
   - Temperature: 95-98°C
   - Duration: 10-20 minutes
   - Bath Ratio: 1:20
   - Steaming Time: Approximately 45 minutes
   - Dosage: 0.1-0.5%

By adhering to these guidelines, paper manufacturers can achieve the desired level of brightness and whiteness in their products.