Polyurethane Sheathed Flexible Multi-Core Cable Polyurethane (PUR) sheathed flexible multi-core cables are highly durable and versatile cables designed for demanding industrial and commercial applications. These cables consist of multiple insulated conductors bundled together within a robust polyurethane outer sheath, offering exceptional flexibility, mechanical strength, and resistance to harsh environmental conditions. Construction and Materials The cable features multiple copper conductors, typically stranded for enhanced flexibility, each insulated with materials such as PVC, TPE, or cross-linked polyethylene (XLPE) to ensure electrical safety and signal integrity. The conductors are twisted or shielded (if required) to minimize electromagnetic interference (EMI) in sensitive applications. The outer sheath is made of polyurethane, a material known for its outstanding abrasion resistance, oil resistance, and ability to withstand extreme temperatures (-40°C to +90°C or higher, depending on the grade). Key Features and Benefits 1. Flexibility – The stranded conductors and PUR sheath allow the cable to bend repeatedly without damage, making it ideal for dynamic applications such as robotics, automated machinery, and cable carriers. 2. Durability – Polyurethane resists cuts, tears, oils, chemicals, and UV exposure, ensuring long service life even in harsh industrial environments. 3. Abrasion Resistance – The tough outer sheath protects the internal conductors from wear caused by friction, dragging, or contact with rough surfaces. 4. Temperature Stability – PUR maintains flexibility in both cold and high-temperature conditions, unlike some materials that become brittle or degrade. 5. Moisture and Chemical Resistance – The sheath repels water, solvents, and hydraulic oils, making it suitable for wet or chemically aggressive settings. 6. Shielding Options – Some variants include foil or braided shielding to prevent EMI/RFI interference, crucial for data transmission and control signals. Applications These cables are widely used in: - Industrial automation (robotic arms, CNC machines) - Mobile equipment (cranes, excavators) - Renewable energy systems (wind turbines, solar trackers) - Entertainment technology (stage lighting, moving rigs) - Marine and outdoor installations Standards and Certifications PUR-sheathed multi-core cables often comply with international standards such as IEC, UL, CE, and RoHS, ensuring safety and performance reliability. In summary, polyurethane-sheathed flexible multi-core cables provide an optimal balance of flexibility, durability, and environmental resistance, making them a preferred choice for demanding electrical and signal transmission applications.