Methods of manufacturing a medical article that include radial deformation of a polymer tube are disclosed. A medical article, such as an implantable medical device or an inflatable member, may be fabricated from a deformed tube.

A catheter is provided comprising localized regions of modified flexibility. The regions of modified flexibility may comprise a softened inner liner, for example softened via stretching the inner liner or disposing a plurality of holes in the inner liner, to modify the bending stiffness and/or tensile stiffness of the catheter. The catheter may further include an axially extending filament that at least partially overlaps the softened portion of the inner liner. The axially extending filament may include an anchoring section to anchor the at least one axially extending filament in a section of the catheter that includes the helical coil.

A balloon catheter has excellent pressure resistance and operability by being thinned while suppressing a decrease in pressure resistance strength accompanying an increase in diameter of the balloon. The balloon of the balloon catheter includes at least an inner layer and an outer layer, has an area draw-down ratio (ADDR) of 2.91 or more and 2.97 or less, the area draw-down ratio (ADDR) being determined by a ratio of the cross-sectional area of a tubular parison disposed in a mold and blow-molded in a balloon shape to a cross-sectional area of the balloon after blow molding, and has a layer provided outside the inner layer and having an elongation rate at a breaking point lower than the elongation rate at a breaking point of the inner layer.

A catheter is provided comprising localized regions of modified flexibility. The regions of modified flexibility may comprise a softened inner liner, for example softened via stretching the inner liner or disposing a plurality of holes in the inner liner, to modify the bending stiffness and/or tensile stiffness of the catheter. The catheter may further include an axially extending filament that at least partially overlaps the softened portion of the inner liner. The axially extending filament may include an anchoring section to anchor the at least one axially extending filament in a section of the catheter that includes the helical coil.

A geothermal heating and cooling system comprising a conduit comprising a biaxially oriented pipe made by a process comprising a) forming a polymer composition comprising an ethylene-based polymer and/or a propylene-based polymer into a tube and b) stretching the tube in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.

A geothermal heating and cooling system comprising a conduit comprising a biaxially oriented pipe made by a process comprising a) forming a polymer composition comprising an ethylene-based polymer and/or a propylene-based polymer into a tube and b) stretching the tube in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.

The invention relates to use of a pipe for transporting chlorinated water, wherein the pipe is a biaxialy oriented pipe made by a process comprising the steps of: a) forming a polymer composition comprising a polyolefin into a tube and b) stretching the tube of step a) in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.

The invention relates to use of a pipe for transporting chlorinated water, wherein the pipe is a biaxialy oriented pipe made by a process comprising the steps of: a) forming a polymer composition comprising a polyolefin into a tube and b) stretching the tube of step a) in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.

The invention relates to use of a pipe for transporting chlorinated water, wherein the pipe is a biaxially oriented pipe made by a process comprising the steps of: a) forming a polymer composition comprising a polyolefin into a tube and b) stretching the tube of step a) in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.

The invention relates to use of a pipe for transporting chlorinated water, wherein the pipe is a biaxially oriented pipe made by a process comprising the steps of: a) forming a polymer composition comprising a polyolefin into a tube and b) stretching the tube of step a) in the axial direction and in the peripheral direction to obtain the biaxially oriented pipe.