| 摘要 |
PURPOSE:To obtain heat accumulation material nearly free from deformation due to a long period of use by coating the surface of a core wire with lubricant for preventing both polymerized body and core wire from adhering to each other when the core wire is inserted into the middle part of the polymerized body to mold a cylindrical heat accumulation. CONSTITUTION:When high density ethylene polymerized body with a density 0.930g/cm<3> is molded in the cylindrical form, in a molded piece having the core wire inserted into its middle part, the surface of the core wire is coated with lubricant to prevent the high density ethylene polymerized body from adhering to the core wire during inserting the core wire into the middle part. The fixing of the core wire into the cylindrical container can be performed securely and the high density ethylene polymerized body is hardly deformed by a long period of use. The high density ethylene polymerized body is not fused when in use and the flow quantity and the flow rate of heat medium in use does not change. Therefore, it is possible to obtain the heat accumulation that does not deteriorate in performance even after a long period of use. |
