| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a compression permanent set and prevent generation of abnormal noise. <P>SOLUTION: The loss tangent tanδ of a rubber composite is made to be in the range of 0.15 to 0.19 when the tension vibration method is used as a measuring method, and the measuring condition is set to be a temperature of 100°C and a frequency of 100 Hz in the oil seal for the power steering made of the hydrogenated NBR whose amount of combined acrylonitrile is 15 to 30 wt.% as the base material. <P>COPYRIGHT: (C)2004,JPO |
