Method of increasing the tensile strength of a dilatation...

Details Method of increasing the tensile strength of a dilatation... Method of increasing the tensile strength of a dilatation...

B - Operations, Transporting

29

D

B29D 22/00 (2006.01) A61M 25/00 (2006.01) A61M 29/02 (2006.01) B29C 55/26 (2006.01)

Patent

CA 2077631

Abstract A method of making a dilatation balloon with a high percentage of the maximum tensile strength of the balloon material from a thin wall parison of a biaxially orientable polymer, such as polyethylene terephthalate (PET). A reverse temperature gradient (decreasing going from the inner to outer diameters) in applied across the sidewall of the parison by flowing a heated fluid through the parison and then sealing one end of the parison and expanding with a heated expansion fluid. Decreases in wall thickness and/or increases in burst strength across the wall can be achieved.

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