Conformable orthopedic casting tape

摘要

An orthopaedic casting tape contains a fibrous substrate impregnated with a water-reactive polyurethane prepolymer. The substrate comprises a combination of an inelastic fibre and an elastomeric fibre, which is not reactive with the prepolymer and which will maintain its elastic properties for at least 12 months in contact with the prepolymer. The elastomeric fibre is incorporated into the substrate along its length to give the substrate an extensibility of 40-200% along its length. A force of 40-175 g/in. is required to extend the substrate to 30% elongation. The elastomeric fibre comprises a blend of a cured olefin rubber and an olefin resin of Shore A hardness less than 80, a 100% tensile modulus of less than 1000 psi and an elongation of at least 200%.