Patent ID: 8710119
Filing Date: 2014-04-29
Classification: B29B,B29C,B29K,C08J,C08K,C08L

Abstract:
1. A production process of polyphenylene ether composition comprising pre-melt compounding 20 to 98.5% by mass of a polyphenylene ether powder (I), 1 to 60% by mass of an inorganic filler powder (II) and 0.5 to 20% by mass of a thermoplastic elastomer having functional group (III), followed by melt compounding; wherein melt compounding is conducted using a twin-screw extruder having a total length of barrels of 800 mm to 5000 mm with a screw rotating speed of 400 rpm to 650 rpm, and a pre-melt compounding zone occupies 45 to 80% of upstream of the twin-screw extruder based on the total length 100% of the twin-screw extruder when a drive side and a molten compound discharging side of the twin-screw extruder are regarded as upstream and downstream, respectively; wherein the reduction rate (ignition loss) of the inorganic filler powder (II) after having been heated at 450° C. for 3 hours is 1 to 50% by mass based on the original.