Sumiploy CS5530 Resin - High-Performance PES Composite

September 17 2018

An Asian automaker has replaced machined aluminum with a unique carbon fiber-reinforced composite -- Sumiploy CS5530 -- in an injection molded oil control valve within the variable valve timing system that controls engine intake and exhaust. The high-performance thermoplastic valve (2-8 valves per vehicle depending on engine size) reduces cost and weight and improves engine response time, hence engine performance. The part has been in commercial use since start-of-production (SOP) in 2015, thus establishing a proven record of performance. Being a thermoplastic, it is fully recyclable (melt reprocessable) at the end of vehicle life.

Sumiploy CS5530 resin is produced by Sumitomo Chemical Co., Ltd. (Tokyo) and sold in North America by Sumitomo Chemical Advanced Technologies LLC. Sumiploy resin is a unique formulation of Sumitomo’s SumikaExcel polyethersulfone (PES) resin plus chopped carbon fiber and a proprietary additive package that boosts wear resistance and dimensional stability.

The resulting high-performance composite offers excellent thermal resistance, good dimensional stability and long-term creep resistance over a broad temperature range, good impact strength, chemical resistance to aromatic hydrocarbons like gasoline, ethanol, and engine oil, inherent flame retardance, and high environmental stress-crack resistance (ESCR).

Unlike many other high-temperature thermoplastics that are challenging to mold, Sumiploy CS5530 resin is high-flow, making it easier to mold high-precision 3D geometries in thin walls.

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