| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a conductive tube which can keep an anti-static function, and further can solve problems, such as chemical contamination, even when the conductive tube has been connected via a joint. <P>SOLUTION: The conductive tube 1 is composed of an inner layer tube 3 which is made of PFA and has a standardized outside diameter, and a conductive outer layer tube 5 peelably coating the outside of the inner layer tube 3. The outer layer tube 5 is formed by mixing conductive materials into PFA. When the conductive tube 1 is connected to the joint, the outer layer tube 5 at the end portion of the conductive tube 1 is peeled by means of a cutter, etc. Then, the inner layer tube 3 only is inserted into the joint, and is fastened in a cap nut 53, a block 55, and a joint body 57. In this case, a gap g is produced between the end surface of the inner layer tube 3 and the perpendicular surface 59a of the bore 59 of the joint body 57. However, chemicals, etc. are not contaminated even if fluid has intruded into the gap because conductive materials is not present. The outer layer tube 5 is grounded via a lead wire 61. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
