| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a roller not generating cracks on a formed body, reducing the permanent compression distortion and also not generating unevenness on an image. SOLUTION: A raw material composition containing a polymer raw material, a conductive substance and a foaming agent is heated by a vulcanization can as a first heating means using directly pressurized water vapor, and the steam pressure in the vulcanization can is sensed at least right before the set heating time at the heating temperature in the vulcanization can is completed to control the pressure reduction speed when the water vapor in the vulcanization can is discharged. |
