Mar 12，2025 by Dawn Group

PETG Plastic Sheet Selection and Application Guide

Core Advantages and Selection Logic of PETG Plastic Sheets

Why Choose PETG Plastic for Sheet Production?

  • Balanced Performance: Transparency and Impact Resistance

    • Light transmittance up to 90%, impact strength 5x higher than standard PET, and resistance to brittleness at low temperatures (-40°C), suitable for outdoor billboards and frozen food packaging.

  • Processing Advantages: Efficient Forming and Surface Treatment

    • Thermoforming temperature: 180–220°C (20°C lower than PMMA, saving 15% energy), ideal for vacuum forming and compression molding, shortening cycle time by 30%.

    • Laser cutting accuracy: ±0.1mm; surfaces require no pretreatment for UV printing or hot stamping. Hardness: 2H–3H, with better scratch resistance than acrylic (PMMA).

PETG vs. Mainstream Sheet Materials 

Material Light Transmittance Impact Strength Processing Temperature Eco-Cert Cost Index

PETG

92%

 ★★★★★  Low FDA/REACH  ★★★★☆

PMMA

93%

 ★★☆☆☆ High Non-Food ★★★☆☆

PC

89%

 ★★★★☆ High Partial ★★☆☆☆

PVC

80%

 ★★★☆☆ Medium  Eco-Concerns ★★★★☆

Processing Technologies and Compatibility Optimization for PETG Sheets

  • Key Thermoforming Parameters

    • Recommended temperature: 185–205°C (to avoid degradation/yellowing); mold fillet radius ≥2mm to reduce stress cracks.

  • Laser Cutting and Engraving

    • Power: 80–120W (adjusted by thickness); speed: 15–25m/min, ideal for mass-produced custom furniture panels.

  • Surface Decoration Solutions

    • UV printing adhesion: 5B (cross-cut test); matte finishing enhances premium texture (e.g., cosmetic packaging).

Common Processing Issues and Solutions

Issue Solution
Sheet Warping Post-forming cooling for 30 mins; mold temp. difference ≤5°C
Poor Print Adhesion Plasma treatment or primer coating (dyne level ≥48)

Industry Applications and Case Studies of PETG Sheets

  • Advertising & Decoration

    • Applications: Lightbox panels, display stands, indoor/outdoor decorative boards; 3-year weatherability (no yellowing), 70% lighter than glass.

  • Food Packaging

    • Applications: Transparent trays, yogurt cup lids, baking molds; FDA-certified, microwave/freezer compatible.

  • Industrial Components

    • Applications: Machine guards, electrical insulation boards; V0 flame-retardant, acid/oil resistant.

PETG Sheet Selection and Cost Optimization Strategies

  • Key Selection Parameters

    • Thickness: 1.5–3mm for advertising/decoration; 2–5mm for industrial parts.

    • Special Requirements: FR grade for flame retardancy; anti-static coatings for ESD protection.

  • Cost Optimization Solutions

    • Lightweight Replacement: 15% lighter than PC with equal strength, reducing logistics costs.

    • Infrared Preheating: Cuts energy consumption by 18%.

FAQ

  1. How is PETG’s yellowing resistance?

    • With UV stabilizers, the outdoor yellowing index is ≤2 (visually undetectable) after 3 years.

  2. Can PETG be re-thermoformed?

    • Yes, multiple times; allow ≥24 hours between cycles to avoid stress accumulation.

  3. How to distinguish PETG from PET?

    • PETG softens at 220°C vs. PET at 260°C; or test via impact resistance.

Contact Dawn Group’s professional team now to access PETG technical parameters and quotes and customize your tailored solution!