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VK HFFR 335 PA is a halogen-free flame retardant (HFFR) based on phosphorus chemistry, specifically designed for polyamide (PA6 and PA66) applications. It provides highly efficient flame retardancy by forming a porous carbon layer on the surface of the polyamide resin during thermal decomposition or combustion. This protective layer acts as a barrier, preventing further degradation and reducing heat release.
Key Features:
Halogen-Free & Environmentally Friendly – Low smoke, non-toxic, and sustainable formulation.
Phosphorus-Based Mechanism – Forms a porous carbon layer to enhance fire resistance.
Compatible with PA6 & PA66 – Suitable for reinforced and unreinforced polyamide formulations.
Thermal Stability – Withstands high processing temperatures of polyamides.
Superior Flame Retardant Performance:
UL94 V-0 – Excellent self-extinguishing properties.
GWIT 775°C (IEC 60695-2-13) – High resistance to ignition.
GWF1 800°C (IEC 60695-2-12) – Ensures low flame propagation and fire hazard reduction.
Application:
Cable Insulation & Connectors – Flame-retardant grades ensure electrical safety.
 Under-the-Hood Parts – Used in radiator tanks, air ducts, and cooling systems.