MANUFACTURING METHOD OF THERMOPLASTIC RESIN BLEND

摘要

PROBLEM TO BE SOLVED: To prevent bubbles from remaining in a thermoplastic resin blend in a manufacturing method of the thermoplastic resin blend using an extruder characterized in that carbon dioxide is added to at least two kinds of thermoplastic resins in a molten state. SOLUTION: This manufacturing method of the thermoplastic resin blend is constituted so that at least two kinds of the thermoplastic resins are supplied to a first extruder to be melted and carbon dioxide is added to and mixed with the molten thermoplastic resins in an amount of 2-200 pts.wt. with respect to 100 pts.wt. of the sum total amount of the thermoplastic resins while the prepared mixture is supplied to a second extruder from the leading end of the first extruder through a connection pipe to degass carbon dioxide from at least one upstream degassing port and at least one downstream degassing port provided to the cylinder of the second extruder through the supply port of the connection pipe before extruding the thermoplastic resins. COPYRIGHT: (C)2005,JPO&NCIPI