Optical Brightening Agent FU-D

Product Overview

Optical Brightening Agent FU-D is a specialized anionic fluorescent whitening compound widely utilized in the paper manufacturing industry to enhance brightness and visual whiteness. With a defined Color Index (C.I.) number of 230 and CAS registry number 27344-06-5, this product is formulated as a homogeneous mixture optimized for industrial-scale application. Its amber transparent liquid form ensures ease of handling, rapid dilution in water, and seamless integration into both wet-end pulp addition and surface sizing processes.

Specifications

Industrial Applications

This optical brightener delivers superior performance in paper production environments. It can be directly incorporated into the pulp slurry at a dosage range of 0.2% to 5% relative to the weight of absolutely dry pulp. Critical handling guidance includes avoiding concurrent addition or direct contact with cationic chemicals due to potential incompatibility and performance loss.

During surface sizing operations, Optical Brightening Agent FU-D exhibits enhanced efficacy when used in conjunction with standard polymeric carriers such as carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), and starch. Typical application concentrations in sizing formulations range from 1 to 60 g/L, enabling flexible dosing based on desired brightness outcomes and process conditions.

Handling and Storage

• Supplied in 50 kg or 230 kg drums, 1000 kg IBC tanks, or custom packaging per client requirements.
• Store at ambient room temperature in a dry, well-ventilated area away from incompatible materials.
• Ensure containers remain tightly sealed when not in use to maintain product integrity.