| 摘要 |
PROBLEM TO BE SOLVED: To efficiently obtain an acceptable product in a short time by controlling the formation of the gel film of a polyamide resin(A) composed mainly of methaxylylene diamine andα,ω-fatty dicarboxylic acid and the generation of streaks in a finished product and eliminating a defective product including a gel and a granule and further, preventing the gel and breakdown product of the resin(A) present in a resin passage from being discharged for a long time, when a device for extruding the polyamide resin(A) is restarted after its stoppage. SOLUTION: The device for extruding the resin is stopped after the polyamide resin(A) is substituted with a polyolefin resin, a polyamide resin other than the polyamide resin(A) or a polyester resin. COPYRIGHT: (C)2004,JPO |
