Overview
High Surface Hardness PA is a modified polyamide engineered to withstand extreme wear and mechanical stress. It combines the base properties of nylon with additives like glass fibers or minerals to enhance surface durability. Commonly used in high-friction environments, it outperforms standard PA in longevity and load-bearing capacity. This material is favored in industries where metal replacement is sought for weight reduction or corrosion resistance. Its adaptability to injection molding and CNC machining makes it suitable for complex part geometries. Grades are tailored for specific hardness levels, often measured on the Rockwell R scale.
Physical and Chemical Properties
The material's hardness typically ranges from Rockwell R 100 to 120, achieved through reinforcements like 30-50% glass fiber. It maintains tensile strengths of 80-150 MPa and impact resistance even at low temperatures. Thermal stability extends up to 120°C for continuous use. Chemically, it resists oils, greases, and weak acids but may degrade in strong acids or phenols. Its low moisture absorption (1.5-2.5% at saturation) reduces dimensional changes compared to unmodified PA. Electrical insulation properties are retained, making it useful in electronic housings.
Main Applications
Automotive applications include throttle valves, clutch parts, and seat adjusters, where hardness reduces wear from constant movement. Industrial uses encompass conveyor belt components, pump housings, and textile machinery parts subjected to abrasive materials. Consumer goods leverage this PA for high-end power tool housings and sporting equipment like ski bindings. In electronics, it serves in durable connector housings. Medical devices utilize sterilizable grades for reusable surgical instruments.
Safety and Storage
While non-toxic in solid form, machining generates dust requiring PPE like N95 masks. Ensure adequate ventilation during processing. Granules are hygroscopic; store in sealed containers with desiccants to prevent moisture uptake. Fire safety: Self-extinguishing grades (UL94 V-0) are available. Avoid temperatures above 300°C to prevent thermal decomposition. Disposal follows standard plastic recycling protocols, though fiber-reinforced grades may require specialized handling.
B2B Procurement Guide
Key specifications to confirm: hardness rating (e.g., Rockwell R or Shore D), reinforcement type/percentage, and color requirements. MOQs typically start at 500 kg for standard grades, with lead times of 2-4 weeks. For custom formulations, provide details on environmental exposures (chemicals, UV, temperature cycles). Testing certificates like ISO 527 for tensile strength or ASTM D785 for hardness should accompany bulk orders. Consider regional suppliers for cost-effective logistics in North America (e.g., DuPont), Europe (BASF), or Asia (Toray).
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