| 摘要 |
PURPOSE:To prevent decrease of mold release effect after spinning for a long time by applying dimethylsilicone oil to spinneret face and then further applying an alkylphenylsilicone oil thereto. CONSTITUTION:After dimethylsilicone oil is applied to the spinneret face, an alkylphenylsilicone oil having more excellent heat resistance than dimethylsilicone oil is further applied thereto and the spinneret face is covered with a silicone coating film having double structure. The cleaning of the spinneret face is also readily carried out. |
