| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the fear that an arom. based material and an olefin based material elutes into the liquid to be aerated coming in contact with a deaeration tube and also to efficiently obtain a prescribed deaeration effect even if the deaeration tube is formed in short and in thin. SOLUTION: As the deaeration tube 3 capable of passing only gas and preventing the permeation of liquid, plural tubes obtained by incorporating a wire material 6 along a longitudinal direction in the tubes 3a, 3b and so forth obtained by extruding the material obtained by converted to paste by adding the dispersion high in volatility and consisting of the single soln. containing no arom. based material and olefin based material to a particular plastic base material and burning the extruded material and forming the gap 7 for circulating the liquid to be deaerated between the outer peripheral surface of the wire material and the inner peripheral surface of the tube, are used.
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