A medical balloon composed of a micro-composite material which provides for radial
expansion of a balloon to a predetermined extent, but which has minimal longitudinal
growing during balloon inflation. The micro-composite material includes a fibril
component, a matrix component, and optionally, a compatibilizer. The fibril component
may preferably be liquid crystal polymer fibers randomly scattered through out
the balloon material. The liquid crystal polymers are created by extrusion at high
speed. An alternative fibril component may be a PET fibers which are uniformly
spaced about the balloon material and extend through out the length of the balloon
material tube.
