Extrudable tubing for delivery of medicinal fluids

A method of coaxially bonding a polymeric tube (10) to a prefabricated tubular body (20), the prefabricated tubular body (20) defining a hollow central tubular passage (22) having a longitudinal axis bounded by an inner wall of polypropylene based material, the method comprising:

• extruding a mating polymeric tube (10) having an outer tubular wall surface (18) comprising thermoplastic propylene-based elastomer (PBE) material, and a central tubular passage having a longitudinal axis and opposing ends,
• treating the outer surface (18) of the mating tube (10) along a selected axial length at one of the end (11) of the tube (10) with a solvent that causes the treated outer surface (18) to adhere to the inner wall of the tubular body (20) on drying,
• inserting the treated end (11) of the mating tube (10) coaxially into the central tubular passage (22) of the tubular body (20) such that the outer surface (18) of the treated end (11) mates with the inner wall of the tubular body (20) along the selected axial length to form a mated juncture,
• allowing the mated juncture to dry such that the treated outer surface (18) solvent bonds to the inner wall,
• wherein the solvent is selected from one or more of cyclohexanone, cyclohexane, hexane, xylene, tetrahydrofuran (THF), ethyl acetate (EA) and methyl ethyl ketone (MEK) and wherein the PBE is a blend of a first polymer component (FPC) which is a predominately crystalline stereoregular polypropylene, and a second polymer component (SPC) which is a crystallizable copolymer of C2, C4-C20 alpha-olefin and propylene.