| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an ethylene copolymer resin, which is a high-pressure polymerization process to produce the ethylene copolymer resin and is excellently characterized by stably producing the ethylene copolymer resin which is reduced in formation of fisheyes. SOLUTION: The method for producing the ethylene copolymer resin is the high-pressure polymerization process to produce the ethylene copolymer resin and is characterized as follows: the temperature of a molten resin at a heat exchanger placed at the outlet of a high-pressure polymerization reactor retains at least 230°C and a fine-meshed filter is attached to a palletizing extruder which palletizes the molten resin. Preferable embodiments are as follows: the case wherein the linear velocity of a mixed fluid of gas with liquid at inside piping of the heat exchanger retains 40-80 m/sec, the case wherein the filter comprises a metal mesh with at least 200 mesh, the case wherein the filter comprises a metallic fiber sintered filter having at least 50μm of filtration precision, etc. COPYRIGHT: (C)2004,JPO
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