Method for producing medical materials

Details Method for producing medical materials Method for producing medical materials

1996-02-02

1997-01-28

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204164, B01K 100, B05D 306

Patent

active

055974562

ABSTRACT:
A plastic tube extruded from an extruder is conveyed through a plasma treatment apparatus. The plasma treatment apparatus is equipped with a tubular electrode body having a high-voltage side electrode and a grounded-side electrode disposed on a tubular insulator and a high frequency electric power source connected to the electrodes. When the plastic tube is conveyed through the electrode body with one end of the tube open to the atmosphere, a mixture of a glow discharge-stabilizing gas and a treating gas is fed into the other end of the tube and an alternating-current high-voltage is applied to generate a plasma region at a pressure near to atmospheric pressure in which the tube is treated with a glow discharge plasma. This method allows an interior and/or exterior surface of a plastic tube designed to convey a medical fluid to be continuously treated by a glow discharge plasma at atmospheric pressure to form an anti-thrombotic and blood-compatible film on the surface treated. The resulting surface-treated medical material can be produced at a comparatively low cost and maintains its original bulk material properties.

REFERENCES:
patent: 4261806 (1981-04-01), Asai et al.
patent: 4326532 (1982-04-01), Hammar
patent: 4786556 (1988-11-01), Hu et al.
patent: 4927676 (1990-05-01), Williams et al.
patent: 5132108 (1992-07-01), Narayanan et al.

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