Method of coating polymeric tubes used in medical devices
AssigneeSciMed Life Systems, Inc.
InventorsLixiao Wang, Yiqun Wang, Dachuan Yang
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Abstract
The present invention relates to a method of preparing a coated hollow polymeric tubular member useful in medical devices. The method involves a simple, unique method of simultaneously extruding and coating the polymeric tube.
Claims23
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder and comprising forcing a stream of a molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a hydrophilic lubricious coating to said tube at a coating thickness that is about 0.2% to about 20% of the total of the wall thickness of the tube and the thickness of the coating prior to said tube exiting said discharge port.
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder comprising forcing a stream of molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a lubricious coating by spraying said lubricious coating on said tube or by pumping said lubricious coating to a channel in said extruder shaping head and circulating said lubricious coating around said tube thereby applying said coating to said tube prior to said tube exiting said discharge port.
Dependencies are inferred from the claim text.