| 摘要 |
Extruded articles, such as tubing or multilumen catheters, having hybrid composition, an axial length and a transverse cross-section orthogonal to the length. The extruded articles have unitary construction and require no assembly. The composition of each cross-section of the article along the length of the article contains a first extrudable material and/or a second extrudable material. The percentage and/or distribution of the two extrudable materials in any cross-section varies along the length of the article in a controlled, continuous or discontinuous manner. The first and second extrudable materials may be an elastomer having different durometers, color or radiopacity. The weight percentage of one of the two extrudable materials in a cross-section may vary abruptly, smoothly and/or periodically along the length of the article. An extrusion die and a method for using the die for making the hybrid, unitary extruded articles is disclosed.
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