{"id":700,"date":"2026-08-17T03:14:12","date_gmt":"2026-08-17T03:14:12","guid":{"rendered":"https:\/\/injectionstretchblowmolding.com\/?p=700"},"modified":"2026-08-17T03:14:12","modified_gmt":"2026-08-17T03:14:12","slug":"how-to-process-pc-polycarbonate-on-an-isbm-machine-drying-temperature-and-safety","status":"publish","type":"post","link":"https:\/\/injectionstretchblowmolding.com\/id\/application\/how-to-process-pc-polycarbonate-on-an-isbm-machine-drying-temperature-and-safety\/","title":{"rendered":"How to Process PC (Polycarbonate) on an ISBM Machine: Drying, Temperature and Safety"},"content":{"rendered":"
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Polycarbonate (PC) is the undisputed king of engineering plastics in the blow molding industry. Boasting a glass-transition temperature (Tg) of 147\u00b0C, extreme impact resistance, and crystal-clear optical properties, PC is the mandatory material for reusable 5-gallon water coolers, high-end baby bottles, aviation tableware, and LED light bulb covers. However, processing PC on a One-Step Injection Stretch Blow Molding (ISBM) machine is an unforgiving engineering challenge. Unlike standard PET, Polycarbonate has a brutally high melt viscosity, requires barrel temperatures exceeding 300\u00b0C, and is catastrophically sensitive to even trace amounts of moisture. Attempting to run PC with standard PET parameters or auxiliary equipment will instantly result in silver streaking (splay), severe yellowing, un-blowable preforms, and severe safety hazards for the operator. This comprehensive guide outlines the exact thermodynamic, pneumatic, and safety protocols required to successfully process Polycarbonate on an ISBM platform.<\/p>\n

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