{"id":698,"date":"2026-08-17T03:08:13","date_gmt":"2026-08-17T03:08:13","guid":{"rendered":"https:\/\/injectionstretchblowmolding.com\/?p=698"},"modified":"2026-08-17T03:08:13","modified_gmt":"2026-08-17T03:08:13","slug":"how-to-set-up-isbm-machine-parameters-for-petg-temperature-pressure-and-stretch-rod-speed-2","status":"publish","type":"post","link":"https:\/\/injectionstretchblowmolding.com\/nl\/application\/how-to-set-up-isbm-machine-parameters-for-petg-temperature-pressure-and-stretch-rod-speed-2\/","title":{"rendered":"How to Set Up ISBM Machine Parameters for PETG: Temperature, Pressure and Stretch Rod Speed"},"content":{"rendered":"
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Processing PETG (Polyethylene Terephthalate Glycol) on a One-Step Injection Stretch Blow Molding (ISBM) machine is fundamentally different from processing standard PET. While standard PET is highly forgiving and relies on rapid crystallization dynamics, PETG is a completely amorphous polymer. This gives it the superpower of achieving massive wall thicknesses with glass-like clarity\u2014but it also makes the material highly sensitive to shear stress, thermal degradation, and over-stretching. If you attempt to run PETG using standard PET machine parameters, you will instantly encounter gate blush (haze), yellowing, severe uneven wall thickness, and catastrophically brittle bottles. Mastering PETG requires a delicate balancing act across the injection barrel temperatures, multi-stage injection speeds, precise stretch rod timing, and aggressive mold cooling. This definitive engineering guide unpacks the exact parameter methodologies required to produce flawless, premium cosmetic and pharmaceutical PETG packaging.<\/p>\n

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