Patent ID: 6136394
Filing Date: 2000-10-24
Classification: A61L,B32B,F16L,Y10T

Abstract:
A tube comprising:(a) an inner layer consisting essentially of a copolyester obtained from at least one of poly (alkylene oxide) glycol, 1,4-cyclohexanedicarboxylic acid and 1,4-cyclohexanedimethanol;(b) an interlayer consisting essentially of at least one of an ethylene-vinyl acetate copolymer and a polyester block amide containing at least one polyamide block and at least one poly(alkylene oxide) glycol block; and(c) an outer layer consisting essentially of a copolyester of poly(alkylene oxide) glycol, 1,4-cyclohexanedicarboxylic acid and 1,4-cyclohexanedimethanol;said layers being co-extruded into a flexible tube suitable for high-frequency welding;and said tube having a thickness of at least about 200 microns.