| 摘要 |
<p>A catheter tube having improved strength and lubricity. The catheter tube can be used advantageously as a guide wire tube for small profile intravascular catheters. The tube can be formed by extruding a mixture of thermoplastic polymeric material, hard particles, lubricating particles, and a lubricant. The lubricant is preferably an external lubricant capable of forming a film over the tube surfaces. One tube is formed of polyamide, molybdenum disulfide particles, PTFE particles, and zinc stearate. Applicants believe the hard disulfide particles and lubricating PTFE particles protrude from the tubular surfaces and are coated with a film of lubricating zinc stearate. The film is believed to reduce the friction and resulting PTFE elongation caused by a guide wire sliding over the PTFE protrusions.</p> |
