Product Name: PET Optical Brightener OB-1 Masterbatch, PET Brightening Masterbatch

Common Synonyms: OB-1 Masterbatch, Plastic Brightening Masterbatch, Fluorescent Brightening Masterbatch, Chemical Fiber Brightening Masterbatch

Appearance: Regular yellowish-green plastic pellets, free of foreign particles, agglomerates and dust

Core Components: High-purity Optical Brightener OB-1, Premium PET Carrier Resin

Effective Purity: 10%–30%, customizable for exclusive concentrations and special formulations

Core Application: Whitening, brightening, yellowing removal and luster enhancement for plastics and chemical fiber products

Product Overview

PET Optical Brightener OB-1 Masterbatch is a high-performance, heat-resistant fluorescent brightening additive specially developed for the polyester fiber and plastics industries. Using high-purity Optical Brightener OB-1 as the main active ingredient and compounded with dedicated PET carrier resin, it is produced through intensive mixing, dispersion and standardized pelletizing processes. It perfectly solves common industry problems of traditional OB-1 powder, such as dusting, uneven dispersion, caking, screen clogging and inaccurate metering, making it the optimal solution for brightening virgin and recycled PET as well as various general-purpose plastics.

With excellent fluorescent brightening properties of OB-1, this product effectively neutralizes yellowing and dullness, imparts pure high whiteness and soft, bright luster to finished products. It also features outstanding heat resistance, compatible with chemical fiber spinning and high-temperature plastic processing. The brightening effect is long-lasting, wash-resistant, light-resistant and resistant to yellowing or fading. It is widely used in textile & apparel, medical consumables, home textiles, plastic packaging and other fields with high requirements for whiteness and appearance, comprehensively enhancing the grade and market competitiveness of end products.

Core Product Advantages

Outstanding Whitening & Brightening Effect: Formulated with high-purity OB-1 active ingredient, it delivers high fluorescent brightening efficiency, quickly eliminating yellow and gray tones to achieve pure, high whiteness with full, soft brightness, providing a fresh, premium white finish far superior to ordinary brightening products.

Excellent Heat Resistance: Heat resistance ≥ 290℃, suitable for high-temperature processes including PET spinning, high-temperature injection molding and film blowing. The brightening component remains stable without decomposition or degradation at high-temperature melting, ensuring consistent brightening performance and processing stability.

Uniform Dispersion & Dust-Free: Uniformly shaped pellets prevent agglomeration, caking and dusting during processing. Excellent filtration performance avoids clogging of spinning filters and dies, extending equipment service life and maintaining production efficiency.

Excellent Compatibility & Wide Adaptability: Highly compatible with PET and recycled polyester, also suitable for various plastics including ABS, PS, HIPS, PC, PP, PE, EVA and rigid PVC. Applicable to both virgin and recycled materials with strong versatility.

Stable Batch & Consistent Quality: Accurate and convenient metering, uniform mixing with plastic raw materials without wall adhesion or segregation. Ensures consistent brightening effect across batches, eliminates color difference and uneven whiteness, and improves product yield.

Durable, Weatherable & Safe: Brightening effect is wash-resistant, friction-resistant and UV-resistant. No yellowing, precipitation or migration during long-term use. Complies with consumer product safety standards, suitable for direct-contact products such as apparel and medical consumables.

Flexible Customization & Strong Adaptability: Exclusive concentrations and carrier formulas can be customized for polyester filament, staple fiber, recycled bottle flake spinning and other applications. Dosage ratio is adjustable as required, with a recommended general dosage of approximately 2%.

Technical Specifications

Application Fields & Processing Technologies

This product is mainly used for fluorescent brightening and yellowing removal of various plastic and recycled plastic products, with wide compatibility and application scenarios as follows:

Chemical Fiber & Textile Field: Recycled polyester staple fiber, polyester filament, sewing thread, industrial yarn; textile products such as white shirts, white socks, medical apparel, sportswear and white gloves; home textiles including cushions, pillows, sofa fabrics, toys and space quilts.

Plastics Processing Field: Virgin PET, recycled PET bottle flakes, recycled PVC, rigid PVC; general plastic products and plastic profiles made of ABS, PS, HIPS, PC, PP, PE, EVA, etc.

Compatible Processes: Conventional chemical fiber and plastic processing technologies including polyester spinning, blow molding, film blowing, injection molding, extrusion and wire drawing, directly added as a brightening agent throughout production.

Usage

The recommended general dosage is about 2%. The actual amount can be flexibly adjusted according to raw material type (virgin/recycled), required whiteness and processing technology. Products with different concentrations can be customized to meet specific needs.

The above parameters are standard laboratory test data for production reference only. Actual brightening effect may vary slightly due to differences in raw materials, formulations, processing equipment and technologies of downstream manufacturers. Sample trial production is recommended before mass production.