| 摘要 |
A process which comprises providing a preform (1a) comprising a polymeric material formed to permit the introduction of a fluid under pressure into the preform (1a), heating the preform (1a) to a temperature at or above the glass transition temperature of the polymeric material and below the melting temperature of the polymeric material, placing the heated preform (1a) into a substantially cylindrical mold (10a) with a polished seamless inside surface, introducing a fluid under pressure into the heated preform (1a) while maintaining the preform (1a) axially centered in the mold (10a), thereby causing the preform (1a) to expand without contacting the mold surface, subsequently causing the preform (1a) to expand until it contact the mold surface, heating the expanded preform (1a) to an appropriate heat setting temperature above the stretching temperature and below the melting temperature of the polymeric material while maintaining fluid pressure, and subsequently cooling the set preform, resulting in formation of a biaxially oriented seamless belt. The thin walled, high surface quality biaxially oriented seamless belt thus formed is then either used as a substrate for an electrophotographic or ionographic imaging member or used as a paper handling belt in the document handler of an electrophotographic copier. <IMAGE> |
