Neoprene (CR) Rubber Coating
topic
Neoprene (polychloroprene, CR) latex or solution (20–30% solids) is applied to nylon or polyester knit substrates in 2–4 passes via knife coating, building to 2–7 mm total thickness for wetsuit applications. Metal oxide vulcanization (ZnO 5 phr, MgO 4 phr) at 150°C for 15 minutes achieves tensile strength of 18–22 MPa and thermal insulation of 0.035–0.050 W/m·K. CR provides inherent flame retardancy (LOI 26–28%) and ozone resistance. Nitrogen-blown foaming at 0.5–2.0% produces cellular neoprene with density of 0.15–0.40 g/cm³ for buoyancy and thermal applications in diving suits and water sports equipment.
Role
Essential material for thermal protection in water sports and commercial diving, providing the unique combination of stretch, insulation, and buoyancy required for wetsuits and drysuits across recreational and professional markets.