ULTEM vs PEEK: Which One Is the True King of High-Temperature Plastics?
A comparison between ULTEM (PEI) and PEEK from a specialty plastics factory with 15 years of experience — including 12 years extruding ULTEM and PEEK. PEEK is the king of high temperature plastics with 260°C continuous service, while ULTEM offers excellent performance and better cost below 170°C. Professional guidance for material selection and custom extrusion solutions.