Method of increasing the tensile strength of a dilatation balloo

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

1993-04-06

1994-04-19

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264532, 264570, 264573, 604 96, 606192, 606194, B29C 4908, B29C 4964

Patent

active

053043405

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) is 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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