Overview
POM 730.20 is a premium-grade polyoxymethylene copolymer engineered for demanding industrial applications. As a semi-crystalline thermoplastic, it combines high mechanical strength with exceptional dimensional stability, making it ideal for precision components subjected to repetitive stress. Compared to homopolymer POM, this copolymer variant offers improved thermal stability and reduced formaldehyde emission during processing. Its balanced properties stem from a carefully controlled molecular structure, ensuring consistent performance across temperature ranges (-40°C to +100°C).
Physical and Chemical Properties
POM 730.20 exhibits a tensile strength of ~60 MPa and elongation at break of ~40%, outperforming many engineering plastics in fatigue resistance. Its low coefficient of friction (0.2-0.3 against steel) makes it suitable for moving parts without additional lubrication. Chemically, it demonstrates remarkable resistance to hydrocarbons, alcohols, and weak acids, though prolonged exposure to strong acids or bases should be avoided. The material maintains properties at 50% relative humidity with only 0.2-0.3% water absorption, minimizing dimensional changes in humid environments.
Main Applications
In automotive engineering, POM 730.20 is extensively used for fuel system components, window regulators, and seat belt mechanisms due to its fuel resistance and durability. The electronics industry employs it for connector housings and insulating parts benefiting from its dielectric strength (≥20 kV/mm). Industrial applications include conveyor system components, pump gears, and precision bearings. Medical device manufacturers utilize sterilizable grades for surgical instrument handles and drug delivery mechanisms, though specific biocompatibility certifications must be verified for medical use.
Safety and Storage
During injection molding or machining, adequate ventilation is crucial as overheating (>220°C) may release formaldehyde vapor. Processing areas should have fume extraction systems, and operators must wear NIOSH-approved respirators for particulate matter. Storage recommendations include keeping materials in original packaging at temperatures below 40°C. Bulk bags should be placed on pallets to prevent moisture absorption. Shelf life typically exceeds 24 months when stored properly, though regrind material should be used within 6 months to prevent property degradation.
B2B Procurement Guide
When sourcing POM 730.20, prioritize suppliers with batch-to-batch consistency guarantees. Request certificates of analysis for key parameters: melt flow rate (typically 8-12 g/10min at 190°C/2.16kg), ash content (<0.1%), and stabilizer composition. For large-volume purchases (20+ metric tons), negotiate pricing based on quarterly contracts linked to methanol feedstock prices. Quality verification should include third-party testing for ISO 9988 compliance. Lead times average 4-6 weeks for custom formulations, while standard grades are often available from stock.