Why should you know the difference between PETG and PETG-CF?

In industrial design and manufacturing, a slight deviation in material selection may lead to a surge in costs or even substandard performance. Although PETG and PETG-CF belong to the same polyester family, their mechanical properties, processing difficulty and applicable scenarios are significantly different.

Common misunderstandings include mistakenly using PETG for high-strength scenarios, resulting in component breakage, or overusing PETG-CF, driving up costs.

This article will help you quickly identify the optimal material through comparative analysis, and understand how Dawn Group provides PETG solutions.

Properties of PETG and PETG-CF

PETG is modified by adding CHDM, with high transparency and impact resistance.

• Chemical stability: oil, acid and alkali resistant.
• Processing convenience: low melting point (220-260℃), suitable for standard injection molding machines and extrusion equipment.
• Environmental advantages: 100% recyclable, in line with EU REACH and FDA food contact standards.

PETG-CF is a composite material composed of PETG and carbon fiber.

• Strength improvement: tensile strength can reach 2 times that of PETG.
• Lightweight: density is reduced by 5%-10%, suitable for automobile weight reduction and drone structural parts.
• Function expansion: carbon fiber gives conductivity to solve the problem of static electricity accumulation.

In-depth comparison: 3 dimensions to analyze PETG and PETG-CF

1. Mechanical Properties

2. Thermal Properties

• PETG: 70-75℃ (0.45 MPa load)
• PETG-CF: 90-110℃ (carbon fiber improves heat resistance by 20%-30%)

3. Processing Techniques

• Applicable processes: injection molding, extrusion, thermoforming, 3D printing (FDM).

• Equipment requirements: carbide or chrome-plated molds, wear-resistant screws (to avoid carbon fiber wear).

PETG and PETG-CF Selection Guide

• Recommended material: PETG (transparent, non-toxic).

• Recommended material: PETG-CF (20% carbon fiber ratio).

• PETG: Suitable for low-cost prototypes and educational purposes (strong interlayer adhesion and not prone to warping).
• PETG-CF: Used for terminal parts (such as robot arm grippers) to improve wear resistance and dimensional stability.

Dawn Helf PETG

As a subsidiary of Dawn Group, Dawn Helf is committed to the research, development, production, and sales of copolyester PETG and PCTG. It has obtained 7 national invention patents and is China's first enterprise to commercialize copolyester PCTG.