Medical balloon has been widely used for the treatment of cardiovascular and cerebrovascular diseases

but the theoretical studies in processing process of medical balloon have reported less in the domestic. This paper introduced briefly in the processing process of medical balloon at first

and producted a series of balloon with the nylon 12 as raw materials

through first molding

second forming and final molding process of the operating conditions of control. Then the compliance change in the molding process were studied with hydraulic blasting apparatus

And the internal structure

material’s melting point

crystallinity and the change of the interior Chemical groups of the nylon 12 during the molding process were separately inspected

using X ray diffraction (XRD)

Differential Scanning Caborimetry (DSC) and infrared transmission spectroscopy experiments. The acting force between the polymeric chain of nylon 12 reduced at the first

so that the material has better plasticity and machinability

and then the acting force of polymer chain is enhanced

so that the final balloon has higher strength and stability were discovered through the characterization in three of the above processing steps.