| 摘要 |
A liquid mixture containing a liquid polymeric material and a granular filler is injected into a mold ( 11 ) for centrifugal molding and subjected to centrifugal molding, thereby preparing a cylindrical body including a homogeneous dispersion layer ( 2 ) having the filler homogeneously dispersed in the polymeric material and a high-density packed bed ( 1 ), formed on the outer peripheral surface side or on the inner peripheral surface side of the homogeneous dispersion layer ( 2 ), containing the aforementioned polymeric material more densely filled with the aforementioned filler. The high-density packed bed ( 1 ) is removed for exposing the surface of the homogeneous dispersion layer ( 2 ). According to this structure, the yield of the elastic cylindrical body can be improved.
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