| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a melt extrusion method capable of producing a sheet, a film, fibers, a molded product of a clean molten thermoplastic resin not containing thermally decomposed matter, gelled matter or foreign matter. SOLUTION: In a melt extrusion method supplying a thermoplastic resin to a melt extruder to melt and filter the same and extruding the filtered molten resin from a molding cap, the thermoplastic resin is molded while vibration is applied to the resin in the process from the melting process to the filtering process. The pressure of the molten resin in a vibration applying process is pref. set to a high pressure of 5 MPa or more. The thermoplastic resin is selected from a polyester, a polyolefin, polyphenylene sulfide and a polyamide.</p> |
