Polyurethane Elastomer Sheet
Overview
Polyurethane Elastomer Sheet, colloquially termed 'cow tendon polyurethane' due to its toughness and flexibility, is a synthetic material engineered for demanding industrial applications. It bridges the gap between rubber and plastic, offering superior mechanical properties such as high elasticity, abrasion resistance, and resilience to oils and chemicals. The material is thermoset, meaning it retains its properties under heat and stress without melting. Common production methods include casting or extrusion, with formulations tailored for specific hardness (Shore A 60–95 or Shore D 40–80). Its versatility makes it a preferred choice for dynamic applications where durability is critical, such as in mining, automotive, and machinery sectors.
Physical and Chemical Properties
Polyurethane elastomer sheets exhibit a unique combination of hardness and elasticity, with tensile strength ranging from 30–60 MPa and elongation at break exceeding 300%. Their abrasion resistance is 5–10 times higher than natural rubber, making them ideal for high-wear environments. The material also resists ozone, weathering, and moderate chemical exposure, though strong acids/bases may degrade it. Thermal stability typically spans -40°C to +80°C, with specialized grades extending to 120°C. Density ranges from 1.1–1.25 g/cm³, and the sheets are available in thicknesses of 1–50 mm. Key additives may include UV stabilizers or flame retardants for specialized applications.
Main Applications
The primary use of polyurethane elastomer sheets is in industrial components subjected to friction, impact, or repetitive motion. Conveyor belt liners benefit from its wear resistance, while seals and gaskets leverage its compressibility and oil resistance. In manufacturing, it serves as vibration dampers for machinery and rollers for printing/packaging equipment. Other niche applications include agricultural machinery parts, elevator buffers, and protective linings for chutes/hoppers. Custom-cut sheets are also used in automotive suspension bushings and marine equipment due to their resistance to saltwater and hydrolysis.
Safety and Storage
Polyurethane elastomer sheets pose minimal health risks under normal handling conditions. Dust generated during machining may irritate respiratory tracts, requiring adequate ventilation or PPE. The material is non-flammable but may emit toxic fumes if burned—avoid open flames. For storage, keep sheets flat or rolled (without creasing) in a dry environment below 40°C. Prolonged exposure to UV or humidity can cause surface degradation. Compatibility testing is recommended when used with aggressive chemicals like concentrated acids or ketone solvents.
B2B Procurement Guide
When sourcing polyurethane elastomer sheets, specify hardness (Shore scale), thickness, and dimensions (sheets/rolls). Critical performance factors include dynamic load capacity (for rollers/buffers) and coefficient of friction (for conveyors). Food-grade or FDA-compliant grades are available for specific industries. Suppliers often provide custom die-cutting or bonding services. Lead times vary by order volume; sample testing is advised for mission-critical applications. Price depends on raw material costs (MDI/TDI-based) and order volume, with bulk discounts commonly available for orders exceeding 100 sqm.
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