Ultra high molecular weight polyethylene boat buoy

UHMWPE Boat-Shaped Navigation Buoy

Designed as visual aids for maritime navigation, these boat-shaped buoys are deployed at critical locations such as harbor entrances and channel turning points to assist vessel positioning and course alignment. Constructed from ultra-high-molecular-weight polyethylene (UHMWPE), they offer high wave resistance, watertight integrity, and long-term durability in marine environments.

Key Technical Features

• Material Composition: UHMWPE with molecular weight ≥3.5 million g/mol, enhanced via chemical/physical cross-linking for improved creep resistance and environmental stress crack resistance (ESCR).

• Maintenance-Free Coloring: Pigments are compounded into the base resin during extrusion, ensuring through-color consistency. Fade resistance exceeds 10 years under UV exposure without surface coatings.

• Impact & Abrasion Resistance: Impact strength ≥160 kJ/m² (GB/T 21461); Rockwell hardness ≈40. Internal steel-plastic composite frame provides structural reinforcement while maintaining elastic recovery.

• Low Surface Adhesion: Coefficient of friction ≈0.1–0.2 (dry). Smooth surface (Ra ≤0.082 μm per ISO 4287) minimizes biofouling; fouling is easily removed by high-pressure washing.

• Environmental Stability: Resistant to seawater, acids (e.g., 36% HCl), alkalis (e.g., 40% NaOH), and UV degradation. Service life exceeds 30 years in temperate marine conditions.

• Temperature Range: Operational from –200°C to +100°C, retaining ≥75% mechanical properties at cryogenic temperatures.

• Hydrostatic Stability: Triple-layer hull design lowers center of gravity and increases metacentric height, providing superior roll stability compared to conventional steel buoys of similar displacement.

• Sustainability: Fully recyclable. Surface restoration via polishing or abrasion cleaning restores appearance after extended service.

Material & Performance Specifications