| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for extrusion-molding an engineering plastic capable of inhibiting the hydrolysis of an engineering plastic composition at the time of the extrusion molding thereof.SOLUTION: In the extrusion molding method of the present invention using an extruder 1 including a cylinder 10 for extrusion molding and a multiaxial screw 20 inserted into the cylinder, a conveyance unit 21 for conveying, toward the downstream side, a raw ingredient fed from a feed unit OP configured on the cylinder 10 is configured on the multiaxial screw 20. The raw ingredient includes 100 parts.wt. of at least one selected from among polybutylene terephthalate, polycarbonate, and polyamide XD and 5-400 parts.wt. of a hygroscopic filler, whereas the screw constitution of the conveyance unit 21 comprises a single full-flight screw having, in a case where the outermost diameter of the flight is defined as D, a flight lead of 1.0D or above and 2.5D or below and a screw length of 3.0D or above and 10D or below. |
