Flame Retardants, Polyethylene Terephthalate (PET)

PET-55D Microencapsulated Red Phosphorus Flame Retardant Masterbatch

PET-55D is a PET-carrier microencapsulated red phosphorus flame retardant masterbatch designed for PET fiber spinning, filament production, sheets, films, and engineered PET composites. It uses ultra-fine 2500-mesh red phosphorus encapsulation for uniform dispersion, clean processing, and high thermal stability. PET-55D delivers strong halogen-free flame retardancy at low addition levels while maintaining PET melt stability, mechanical strength, and surface quality.

Attributes

Key Features and Benefits

High FR efficiency enables UL94 V-0 at low 5–7 percent addition.
Ultra-fine >2500-mesh encapsulation ensures uniform dispersion in PET melt.
Halogen-free system provides low smoke and low toxicity behaviour.
Thermal stability ≥360 °C supports high-speed PET spinning and extrusion.
No frosting, blooming, or dust improves product consistency and equipment cleanliness.
Clean combustion and stable melt flow reduce filament breakage and filter clogging.
PET carrier ensures full compatibility with PET resin and prevents interface defects.

Specifications

Technical Highlights

Appearance: Dark brick-red masterbatch.
Flame retardant content: ≥60 percent.
Water content: ≤0.5 percent.
Particle size: ≥2500 mesh.
Decomposition temperature: ≥360 °C.
UL94 performance: V-0 at 2.0 mm.
Halogen content: None.
Carrier resin: PET.
Recommended addition levels:
PET filament: 5–7 percent.
PET short fiber: 5–7 percent.
PET film/sheet: 6–8 percent.
PET composites: 6–10 percent.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

PET fiber spinning: textile filament, decorative fibers, artificial wigs.
PET short filaments: upholstery, carpets, industrial nonwovens.
PET film and sheet: packaging films, insulation films, protective films.
Technical PET products: PET monofilament, tapes, reinforcement fibers.
PET compounding: FR PET pellets for extrusion or molding.
Industries served: textiles, apparel, automotive interiors, electrical insulation, industrial fabrics, packaging and thermoforming.