MULTILAYERED TUBING

摘要

Multilayered tubing which exhibits one or more desirable characteristics of polyvinyl chloride (PVC) tubings, such as clarity, flexibility and toughness, but without the environmental and health hazards associated with PVC materials, is provided. The tubing comprises at least one inner layer (12) of at least one chlorine-free thermoplastic polymer having a flexibility mimicking or greater than that of PVC medical tubing, and at least one outside surface layer (14) of at least one tough, chlorine-free second thermoplastic polymer having a Young's Modulus not more than about fifteen times the Young's Modulus of the first thermoplastic polymer. Also provided is a method of preparing such tubing.