PETG. Glycol-modified PET. Optical clarity.
PETG (Polyethylene Terephthalate Glycol) — modified PET with glycol. Better impact, less brittle, easier to thermoform than standard PET. Standard for medical, signage, displays.
PETG plastic
PETG: amorphous, easy to process, more impact-resistant. PET: crystalline, slightly cheaper, stretched-blow process.
Key principles.
Modified PET
Glycol modification prevents crystallization. Stays amorphous, transparent.
UTS 50 MPa
Higher impact than PET. Stiff, dimensionally stable.
>91% transparency
Water-clear like PET. UV-stable optical clarity.
Easy
Excellent thermoforming. Standard for displays, point-of-purchase, signage.
Good
Resists acids, alcohols, oils. Limited vs ketones, ammonia.
FDA approved
21 CFR 177.1630. Standard for food packaging.
FAQ
PETG: amorphous, easy to process, more impact-resistant. PET: crystalline, slightly cheaper, stretched-blow process.
PETG: stronger, more impact-resistant, FDA-approved. Acrylic: clearer, more scratch-resistant, brittle.
Gamma sterilization OK. Steam autoclave NOT — softens. EtO acceptable.
Medical disposables, food containers, retail displays, machine guards, 3D printing filament.
Recyclable but contaminates PET stream. Mark with #1 PETG specifically.
Popular FDM filament. Easier than ABS, more durable than PLA.
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