| 摘要 |
PURPOSE:To manufacture a seamless belt of superior mechanical physical properties and the like and having little unevenness of electrical resistance value by setting the volume electrical resistance values at respective section of a belt within the specified range for the seamless belt containing polyimide resin and conductive fine powder. CONSTITUTION:A seamless belt contains polyimide resin and conductive fine powder. The volume electrical resistance values at respective sections of the belt are set within the range of 1-10<13> OMEGA.cm, and the maximum of volume electrical resistance values is in the range of 1-10 times as lange as the minimum value. Thus the values of tensile strength, thermal shrinkage ratio and flex resistance frequency can be secured preferably as 50% or more, more preferably 75% or more, compared with the seamless belt of same shape consituted by the same material not containing conductive fine powder. Thus a suitable seamless belt of superior mechanical properties and having little variation of electrical resistance can be manufactured. |
