Overview
FR220N is a flame-retardant grade of polyamide 66 (nylon 66) engineered for applications requiring fire resistance and robust mechanical performance. It achieves UL94 V-0 classification, meaning it self-extinguishes within 10 seconds and does not drip flaming particles. This material is widely adopted in the electrical and automotive industries due to its balance of safety, durability, and processability. Developed as a safer alternative to standard nylons, FR220N incorporates halogen-free or halogenated flame retardants, depending on the formulation. Its popularity stems from compliance with international safety standards (e.g., IEC, RoHS) and adaptability to injection molding, extrusion, and other fabrication methods.
Physical and Chemical Properties
FR220N exhibits a tensile strength of 70–85 MPa and a flexural modulus of 2,500–3,000 MPa, making it suitable for load-bearing components. Its heat deflection temperature (HDT) ranges from 70°C to 100°C at 1.82 MPa, ensuring stability under moderate thermal stress. The material’s flame-retardant properties are achieved through additives like red phosphorus or nitrogen-based compounds, which inhibit combustion without compromising mechanical integrity. Chemically, FR220N resists oils, fuels, and weak acids but may degrade under prolonged exposure to strong acids or alkalis. Its low moisture absorption (<2.5%) minimizes dimensional changes in humid environments, a critical feature for precision parts.
Main Applications
In the electrical sector, FR220N is used for circuit breakers, switch housings, and terminal blocks, where flame resistance is mandatory. Its dielectric strength and tracking resistance make it ideal for insulating components. Automotive applications include connectors, sensor housings, and under-the-hood parts that demand thermal and chemical resistance. The material is also employed in consumer electronics (e.g., power adapters) and industrial equipment (e.g., conveyor belts) where safety regulations preclude standard plastics. Its moldability allows for complex geometries, enabling designers to integrate multiple functions into a single part.
Safety and Storage
FR220N is classified as non-hazardous under normal conditions but may release toxic fumes (e.g., carbon monoxide, nitrogen oxides) when burned. Processing temperatures should not exceed 280°C to prevent decomposition. Workers handling molten material should use protective gear (gloves, goggles) and ensure adequate ventilation. Storage recommendations include keeping pellets in sealed containers to prevent moisture absorption, which can affect processing and final properties. Bulk shipments should be stored on pallets in climate-controlled warehouses to avoid degradation over time.
B2B Procurement Guide
When sourcing FR220N, prioritize suppliers with ISO 9001 certification and proven track records in flame-retardant plastics. Request batch-specific test reports (e.g., UL certification, RoHS compliance) and samples for in-house validation. Pricing varies with raw material costs, so long-term contracts with price adjustment clauses are advisable. For custom formulations (e.g., colorants, enhanced UV resistance), collaborate with manufacturers early in the design phase. Minimum order quantities (MOQs) typically range from 500 kg to 1 ton, though some distributors offer smaller quantities at a premium.
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