| 摘要 |
<p>PURPOSE: To provide a paper feed roll excellent in wear resistance, partial wear resistance, friction coefficient stability and a paper feed characteristics without paper contamination even in use for a long period. CONSTITUTION: A roll is formed of rubber composition containing a low molecular material holding medium material compound (A) containing a low molecular material and medium material and containing a rubber material (B), and the low molecular material has 5×10<5> centipoise or less viscosity at 100 deg.C, to set a 3.0 or less difference of each solubility parameter value between this low molecular material and medium material, and to set 1.0 or more weight ratio of the low molecular material to the medium material. Further, a difference of each solubility parameter value between the low molecular material and the rubber material (B) is 4.0 or less, and wear damping many grooves 6 are formed in the peripheral surface.</p> |
