The Japan Steel Works, Ltd. Plastics Machinery Business Division Compounds for Automotive Applications Open Vent Vacuum Vent Abstract PP compounding grades specialized for automotive applications covers wide variety of parts including bumper, lighting accessories, interior decoration parts and etc. Focusing on PP compounding grades of bumper, it includes multiple characteristics such as high fluidity for injection molding, enhanced mechanical properties and complicated mixture of different viscosity feed materials including rubber and talc. JSW can offer the mixture technology for mixing of complicated and variety materials by adequate distribution which can be utilized for bumper grade extrusion. Features 1. Efficient mixing performance ① Rubber distribution at low temperature is significantly improved by applying appropriate width and tilt angle of the kneading disc. ② Tip clearance adjustment lowered shear rate and polymer temperature. ③ NIC (special kneading barrel) improves mixing performance by applying shear rate fulctuation. Rubber particle 2. High capacity ① The tilt angles of kneading disc and the adjustment of tip clearance improve degassing rate at the open vent. ② DGC （degassing barrel） improves processing rate of feed materials. Lab machine ： TEX65 αⅡ -52.5PW-2V Feed material ： PP ＋ Rubber ＋ Talc （20%） Capacity : 650 ～ 2000kg/h Japan Steel Works, Ltd. Tokyo Head Office Gate City Osaki West Tower 1-11-1, Osaki, Shinagawa-ku, Tokyo 141-0032, Japan Europe (Germany) China (Shanghai)