TI-NI BASED SUPER-ELASTICITY ALLOY WIRE

摘要

PPROBLEM TO BE SOLVED: To provide a high rigidity guide wire core material for a catheter, which is increased in longitudinal modulus to heighten bending rigidity as the weak point of a conventional super-elasticity guide wire, to acquire high pushability and simultaneously excellent flexibility and shape restoration. PSOLUTION: The subject Ti-Ni based super-elasticity alloy wire is a Ti-Ni based super-elasticity alloy wire which has a value of a longitudinal modulus E calculated by an equation (6) constituted of bending moment M upon applying 1% of bending strain and a curvature radius (r) upon applying 1% of bending strain and bending rigidity not lower than 75,000 N/mmSP2/SP, and a guide wire for a catheter using the super-elasticity alloy wire, which has straightness with longitudinal modulus not lower than 80,000 N/mmSP2/SPcalculated by the equation E=Mr/(dSP4/SP/64)...(6) upon applying 1% of bending strain, and excellent pushability, torque transmitting properties, and shape restoration, and a highly rigid antenna wire core material for cellular phones excellent in shape restoration, are provided. PCOPYRIGHT: (C)2005,JPO&NCIPI