| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method for a drain tube which comprises a silicone rubber elastic body while being soft with a spiral rib on the internal surface and enables the draining of the blood and the body liquor by securing a passage without completely closing the tube even when the cross-sectional area of the passage is reduced under the kinking and decompression. SOLUTION: In the production method for the drain tube comprising the silicone rubber elastic body with the rib on the internal surface, a cylinder body comprising a raw silicone rubber is put over a mandrel with one or more grooves cut therein, and moreover, a force is applied evenly from the external surface thereof to press the raw silicone rubber onto the mandrel. COPYRIGHT: (C)2005,JPO&NCIPI
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