Applications of Fluorescent Brightener 367 in Industrial Manufacturing

Fluorescent Brightener 367 plays a key role as an optical brightening agent in various industrial manufacturing sectors. Its main function is to enhance brightness and whiteness in different materials by absorbing ultraviolet light and emitting blue fluorescence. Below, we outline representative application scenarios where our material helps downstream producers achieve high-performance final products.

1. Synthetic Fiber Production

Textile fiber manufacturers use our product primarily in polyester and polyamide (nylon) fiber spinning. Incorporation of this additive during melt spinning enhances the visible brightness and aesthetic value of textile yarns. Strict dosing and dispersion techniques prevent agglomeration and ensure uniform optical effects across large production lots. Special attention is paid to thermal stability during fiber extrusion, maintaining consistent color metrics even at high throughput rates.

Industry compliance standards

• OEKO-TEX® Standard 100 for textile chemical input safety
• REACH Annex XVII (EU Regulation 1907/2006) for restricted substances
• ZDHC MRSL conformance for manufacturing input chemicals
• GB/T 18401–2010 Chinese National General Safety Technical Code for Textile Products

Typical usage ratio

• 20–300 ppm relative to polymer weight, adjusted for desired CIE whiteness index

Downstream process integration

• Added to polymer chips or masterbatch prior to extrusion
• Melt-blend during fiber spinning process
• Low-shear mixing to prevent streaks or spots in filament
• Quality check by online spectrophotometry during production

Final product types

• High-brightness polyester staple fibers
• Nylon filament yarn for sports apparel
• Textured yarn for automotive and interior fabrics
• Sewing threads requiring colorfast brilliance

2. Plastic Compounding & Masterbatch Manufacturing

Compounders and masterbatch producers depend on our brightener for opaque and transparent thermoplastics, especially in applications demanding high reflectance and whiteness like household items and electrical housings. It integrates efficiently during twin-screw extrusion, maintaining stability under elevated melt temperatures typical for engineering resins. Consistent batch-to-batch dosing preserves whiteness metrics and ensures regulatory compliance throughout downstream injection molding or film blowing processes.

Industry compliance standards

• RoHS (2011/65/EU and amendments) for hazardous substance control
• UL 94 for plastics flammability—additive must not affect fire rating
• FDA 21 CFR 178.3297 (when used for food-contact applications, check purity and migration limits)
• ISO 9001 quality management for masterbatch production

Typical usage ratio

• 50–500 ppm, precise level set by polymer base (e.g. polyolefin, ABS, PET); higher levels may cause over-whitening

Downstream process integration

• Direct addition to resin in compounding extrusion stage
• Dispersed in carrier during masterbatch preparation
• Quality tested for color drift and migration during storage
• Maintains performance through downstream molding, extrusion, or film casting

Final product types

• Appliance housings
• White injection-molded plastic parts
• PVC window profiles
• Polyolefin films and packaging

3. Detergent Formulation

Detergent and laundry product manufacturers incorporate the product as a whitening agent in powders and liquid detergents. Effective interaction with cellulosic and synthetic fibers during the wash process imparts lasting brilliance on textiles. Our additive functions under a wide pH and temperature range, with tailoring of granular or liquid formulations depending on end-user performance claims and regionally mandated detergent composition limits.

Industry compliance standards

• EU Regulation (EC) No 648/2004 for detergent labeling and ingredient disclosure
• U.S. EPA Safer Choice Program (for surfactant and additive components)
• GB/T 13171 “Detergent Raw Materials Optical Brighteners” for China
• SASO (Saudi Standards, Metrology and Quality Organization) requirements for laundry products

Typical usage ratio

• 0.05%–0.3% w/w in laundry detergent finished formulations, with lower end for liquid and higher for powder

Downstream process integration

• Blended into detergent slurry before spray drying
• Fluidized bed granulation for powder consistency
• Final liquid addition in concentrated detergent mixing tanks
• Routine stability tests under accelerated aging for shelf life

Final product types

• Powder laundry detergents with optical whiteners
• High-efficiency liquid laundry products
• Laundry soap bars with brightening additives
• Fabric softener blends for commercial washing

4. Paper Coating & Sizing

Pulp and paper manufacturers utilize our material to achieve superior sheet brightness in graphic papers and coated board products. Optimal effect is reached when the brightener is dosed into the coating color or added at the wet end of paper machines. The process requires precise viscosity and dispersion adjustments to meet product strength and printability indices. Our additive remains effective without inducing adverse impacts on print-finish chemicals, glue, or dyes applied in subsequent converting steps.

Industry compliance standards

• EN 648 for paper intended to come into contact with foodstuffs
• ISO 20410 for coated paper brightness measurement
• TAPPI T218 for determination of optical brighteners in paper and board
• SFI® or PEFC™ Chain-of-Custody (if used in certified sustainable papers)

Typical usage ratio

• 0.05–0.2% by dry paper weight; dose adjusted for pulp type and final CIE whiteness target

Downstream process integration

• Added to surface sizing starch or coating color at mill
• Wet end application for uncoated freesheet or tissue
• Metered addition to ensure even distribution throughout paper web
• Online brightness testing to monitor quality through reel completion

Final product types

• High-brightness office copy paper
• Coated magazine and catalog stock
• Folding boxboard for packaging
• Premium tissue and napkin grades

5. Synthetic Leather Manufacturing

Synthetic leather producers incorporate our brightener in polyurethane or PVC-based wet and dry process lines. Uniform distribution in the polymer matrix improves the reflectance of the grain surface, raising both perceived quality and visual appeal. Controlled dosing ensures that optical properties remain stable under heat and mechanical shear during calendaring and embossing, avoiding yellowing during post-processing or aging.

Industry compliance standards

• ISO 17072-2 for determination of optically active substances in leather
• GB 20400-2006 Chinese National Standard for Limits of Harmful Substances in Leather
• California Proposition 65 for chemical substances in consumer goods
• REACH SVHC for substances of very high concern

Typical usage ratio

• 80–250 ppm per polymer base; tailored by surface thickness and base color

Downstream process integration

• Premixed into polyurethane dispersion or PVC plastisol
• Integrated before coating onto fabric substrate
• Maintained through drying, embossing, and curing stages
• QC includes both visual inspection and spectrophotometric measurement of brightness

Final product types

• Upholstery-grade faux leather
• Footwear upper materials
• Synthetic leather goods like bags and wallets
• Automotive seat covers and interior trims