Polyethylene terphthalate PET

Another inventionl l has described a method of producing a laminated composite for use as intravascular catheters such as angioplasty catheters (Fig. 10.48). In the first step, a parison was formed in a coextrusion of multilayer sheet through a die. The parison was heated in a mold and drawn to several times of original length. Next, the parison was expanded radially to the desired dimension and strength. The exterior of the expander was coated with hydrophilic material. Finally, the expander was bonded to the exterior of a tubular catheter. Fluoropolymers such as ETFE, ECTFE, PCTFE, PVDF, and PEA have been mentioned as intermediate layers that bond the outer layer (polyethylene terphthalate, PET), which were coextruded. 

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