PET GF20 Technical Data (Estimated Typical Values)
| Property | Value | Test Standard |
|---|---|---|
| Glass Fiber Content | 20% | ISO 1172 |
| Tensile Strength | 125 – 145 MPa | ISO 527 |
| Flexural Modulus | 8,500 – 10,000 MPa | ISO 178 |
| Notched Impact Strength | 7 – 9 kJ/m² | ISO 180 |
| HDT @1.8 MPa | 215 – 225 °C | ISO 75 |
| Comparative Tracking Index (CTI) | 575 V | IEC 60112 |
PET GF Series Performance Comparison Table (Estimated Typical Values)
| Property | PET GF10 | PET GF20 | PET GF30 | PET GF40 | PET GF50 |
|---|---|---|---|---|---|
| Glass Fiber Content | 10% | 20% | 30% | 40% | 50% |
| Tensile Strength | 100 – 120 MPa | 125 – 145 MPa | 145 – 165 MPa | 160 – 180 MPa | 175 – 195 MPa |
| Flexural Modulus | 7,000 – 8,500 MPa | 8,500 – 10,000 MPa | 10,000 – 12,000 MPa | 12,000 – 14,000 MPa | 14,000 – 17,000 MPa |
| Notched Impact Strength | 6 – 8 kJ/m² | 7 – 9 kJ/m² | 8 – 11 kJ/m² | 7 – 10 kJ/m² | 6 – 9 kJ/m² |
| HDT @1.8 MPa | 205 – 215 °C | 215 – 225 °C | 225 – 235 °C | 230 – 240 °C | 235 – 245 °C |
| CTI (Comparative Tracking Index) | 600 V | 575 V | 550 V | 525 V | 500 V |
| Key Profile | Cost-effective high-strength upgrade | Precision parts with great surface | Best all-around structural performance | High rigidity & creep resistance | Maximum stiffness for metal replacemen |
PET GF20 Key Advantages
✅ Enhanced Stiffness & Surface Finish: Delivers a notable increase in rigidity and strength over GF10 while maintaining the capacity for a very good surface finish, which is often a challenge with higher fiber content.
✅ Precision Engineering Grade: Offers an excellent balance of high mechanical properties, predictable low shrinkage, and good dimensional stability for molding complex, tight-tolerance components.
✅ Robust Performance in Demanding Environments: Provides improved thermal capabilities and maintains good chemical resistance, suitable for more demanding mechanical and electrical applications.
Industry Applications:

Explore the PET Glass Fiber Series in Detail
Click on the links below to view comprehensive technical data, key advantages, and application details for each specific grade.
| Grade | Best For | Overview | Full Details |
|---|---|---|---|
| PET GF10 | Cost-effective upgrade for high-strength, dimensionally stable parts. | The most accessible GF grade, offering a significant boost in strength, stiffness, and heat resistance over unfilled PET. | View PET GF10 Full Data Sheet → |
| PET GF20 | Precision components requiring an excellent surface finish and high mechanical properties. | A balanced performer with superior dimensional stability, good processability, and high surface quality for engineering parts. | View PET GF20 Full Data Sheet → |
| PET GF30 | High-performance structural parts under significant thermal and mechanical stress. | The industry benchmark grade, delivering an optimal balance of very high strength, rigidity, heat resistance, and stability. | View PET GF30 Full Data Sheet → |
| PET GF40 | Ultra-stiff, high-load applications where minimal creep and deflection are critical. | Engineered for maximum rigidity and exceptional long-term dimensional stability under continuous load at high temperatures. | View PET GF40 Full Data Sheet → |
| PET GF50 | Maximum mechanical performance for demanding metal replacement applications. | The pinnacle grade, offering the highest stiffness, strength, and thermal resistance in the series for the most challenging applications. | View PET GF50 Full Data Sheet → |
Powering Innovation Across Industries
| Industry | Key Applications |
|---|---|
| Automotive | High-temperature under-the-hood components (sensor housings, connectors, coil bobbins), structural brackets, lamp sockets and reflectors, wiper system parts. Explore Automotive Applications → |
| Electrical & Electronics | Miniaturized and high-pin-count connectors, circuit breakers, switch housings, motor components (commutators, end caps), transformer bobbins. Discover E&E Solutions → |
| Industrial Equipment | High-load gears, bearings, pump housings and impellers, conveyor system components, robotic structural parts requiring stiffness and creep resistance. See Industrial Uses → |
| Consumer Goods & Appliances | Power tool housings and gears, kitchen appliance components (hand mixer housings, blender bases), high-strength consumer electronics housings. Explore Consumer Applications → |
| Packaging & Technical Parts | Reusable industrial containers (totes, pallets), thin-walled but rigid technical packaging, components requiring inherent gas barrier properties. Inquire About Special Uses → |
How to Choose the Right PET GF Grade?
In simple terms:
For a cost-effective performance upgrade with significantly enhanced strength, stiffness, and heat resistance for structural parts, consider PET GF10.
For the optimal balance of high mechanical properties, excellent surface finish, and dimensional precision in demanding technical components, choose PET GF30. It is the performance benchmark for most structural applications.
For the ultimate stiffness, strength, and long-term dimensional stability under extreme load and heat, consider PET GF50.
Unsure which is perfect for your part? Describe your application to our engineers for a tailored recommendation: https://nylonplastic.com/contact/
Why Choose Us?


PET GF20 FAQ
Q1: When should I choose PET GF20 over GF10?
Choose PET GF20 when your application requires higher mechanical strength, greater rigidity, and better thermal resistance than GF10 can provide, and where excellent dimensional stability and good surface finish are also important. It is ideal for more structurally demanding yet appearance-sensitive parts.
Q2: Can PET GF20 be used for gears or bearings?
Yes, it is a strong candidate. Its combination of high stiffness, low friction, good wear resistance, and excellent dimensional stability makes PET GF20 suitable for light-to-moderate duty gears, bearings, and bushings, especially where exposure to moderate heat is a factor.
Q3: How does its processability compare to PET GF30?
PET GF20 generally has better flow and easier processing than GF30 due to its lower fiber content. It can fill thinner walls and complex molds more readily and typically exhibits less wear on tooling. It offers a good compromise between performance and ease of manufacturing.










