Overview
High-Slip POM is a modified grade of polyoxymethylene engineered with internal lubricants (e.g., PTFE, silicone oil, or graphite) to achieve a friction coefficient as low as 0.1-0.2. Developed in the 1960s, it addresses the need for self-lubricating materials in precision mechanical systems. Unlike standard POM, this variant minimizes stick-slip phenomena and eliminates the need for external lubricants in applications like food processing or cleanroom environments. It maintains POM's inherent advantages: high stiffness, creep resistance, and fatigue endurance.
Physical and Chemical Properties
The material exhibits a 20-30% reduction in friction compared to unmodified POM, with a dynamic coefficient of friction of 0.15-0.25 against steel. Its wear rate is typically below 4×10⁻⁶ mm³/Nm under dry conditions. Chemically, it retains POM's resistance to hydrocarbons, alcohols, and weak acids but remains vulnerable to strong acids and UV degradation. The addition of lubricants slightly reduces tensile strength (55-65 MPa) while improving impact resistance (up to 10 kJ/m² notched Izod).
Main Applications
Primary uses include precision gears in automotive window regulators (reducing noise by 3-5 dB), conveyor chain guides in bottling plants (extending service life 2-3x), and bearings in medical devices (enabling maintenance-free operation). In electronics, it serves as slider components in printers and copiers. The food-grade version (FDA-compliant) is used in dairy processing valves and packaging machinery, where lubricant contamination must be avoided.
Safety and Storage
Dust generated during machining may cause eye/respiratory irritation; local exhaust ventilation is recommended. Thermal decomposition above 200°C releases formaldehyde gas, requiring fume extraction. Store in sealed containers to prevent moisture absorption (max. 0.2% moisture content before processing). Bulk bags should be stacked no more than 3 layers high to prevent compaction. Shelf life is typically 2 years when stored properly.
B2B Procurement Guide
Key specifications to verify: lubricant type (PTFE for highest wear resistance, silicone oil for FDA compliance), filler percentage (5-15% is common), and color stability requirements. For automotive applications, request UL94 HB flammability test reports. Leading manufacturers include DuPont (Delrin® AF), Celanese (Hostaform® S), and Mitsubishi (Iupital® SL). MOQs for custom grades start at 500 kg, with lead times of 6-8 weeks. Spot purchases of standard grades are available through polymer distributors.
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