ELASTOMERIC TUBE AND METHOD OF MAKING SAME

摘要

In an elastomeric tube and a method for making such a tube, two medical-grade silicone rubber compositions are coaxially coextruded to form a tube. The compositions respectively differ in at least one physical property and respectively have similar curing conditions. The two compositions are blended at an interface formed between the two compositions during the coextruding, so that between 1-99% of the tube forms a blended gradient. The coextruded tube is then cured.

主权项

1. An apparatus for making an elastomeric tube, comprising:
an extruder that coaxially extrudes at least two medical-grade silicone rubber compositions, respectively differing in at least one physical property and respectively having similar curing conditions to form a coextruded tube; a blender that simultaneously blends between 1% and 99% of the at least two compositions at an interface formed between the at least two compositions during coextrusion; and a curing unit that cures the coextruded tube.