PETG sheet boasts high transparency, good impact resistance and excellent thermoforming performance, widely used for advertising panels, blister packaging, medical sheets and GAG co-extruded sheets. Many buyers mistakenly use ordinary APET lines for PETG production and face sticking, haze and unstable thickness.
✅ Define your production needs first
- Sheet width & thickness
- Hourly output
- Single-layer or GAG 3-layer co-extrusion
- Raw material: virgin PETG or mixed regrind
🔧 Core machine configuration
- Extruder & screw PETG has a narrow processing window. Optimized low-shear screw avoids yellowing and haze. For GAG sheets, extra co-extruder is needed.
- T-die & melt filter Mirror-polished flow channel + flexible lip for stable thickness. Multi-stage screen changer removes impurities to prevent gels.
- Three-roll calender (most important) Mirror polished rolls with independent temperature control prevent PETG melt sticking and sheet warping. Rolls must keep good parallelism.
- Drying & vacuum system PETG easily absorbs moisture. Reliable dryer and vacuum venting eliminate bubbles and silver marks.
⚠️ Common buying mistakes
- Do not use standard APET line for PETG production
- Do not ignore calender roll surface quality
- Never skip drying system to cut cost
- Do not compare price only
Final Tip
Pick a supplier with real PETG commissioning experience. Good after-sales and spare parts support reduce downtime.
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