GMS Composites EP – 620
Knowde Enhanced TDS
Identification & Functionality
GMS Composites EP – 620 Features & Benefits
- Variable cure cycle 80°C – 150°C
- Very high impact resistance
- Suitable for a range of components and processes
- Excellent shelf life
- Wide range of fibre substrates available
- Made in Australia
Applications & Uses
When combined with fibres such as carbon, aramid, s-glass or polyethylene, EP-620 can be used to produce items requiring energy absorption and impact resistance such as ballistics components, automotive and motorsport products, marine components subject to impact, etc. These products have applications in industries such as defence, military, personal protection, vehicle protection, infrastructure shielding, motorsport, transport and marine. The versatility of EP-620 means that large complex structure as well as small basic components can be produced.
Properties
| Value | Units | Test Method / Conditions | |
| Ultimate Elongation (Tensile, Cured Neat Formulation Cycle for 1hrs at 120°C) | 8.5 - 10.0 | % | - |
| Ultimate Strength (Tensile, Cured Neat Formulation Cycle for 1hrs at 120°C) | 50 - 60 | MPa | - |
| Flexural Strength | 105 - 115 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
| Elongation at flexural strength | 5.2 – 5.7 | % | Cured neat Formulation Cycle for 1hrs at 120°C |
| Ultimate Strength | 80 - 90 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
| Ultimate Elongation | 10.5 – 11.5 | % | Cured neat Formulation Cycle for 1hrs at 120°C |
| Flexural Modulus | 2850 – 3050 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
| Tg (DSC, 10 K/min) | 65 - 70 | °C | Cured neat Formulation Cycle for 1hrs at 120°C |
| Fracture Toughness K1C | 2.20 – 2.35 | MPaÖm | Cured neat Formulation Cycle for 1hrs at 120°C |
| Fracture Energy G1C | 1400 - 1550 | J/m2 | Cured neat Formulation Cycle for 1hrs at 120°C |
| Tensile Strength | 60 – 70 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
| Elongation at tensile strength | 3.0 – 4.0 | % | Cured neat Formulation Cycle for 1hrs at 120°C |
| Ultimate Strength (tensile) | 50 - 60 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
| tensile Modulus | 2900 - 3100 | MPa | Cured neat Formulation Cycle for 1hrs at 120°C |
Technical Details & Test Data
The versatility of GMS Composites EP-620 means a range of cure cycles, pressures and ramp up rates can be adopted all of which will depend greatly on the part being produced. Below is a guide to cure cycles.
| Temperature (°C) | Time |
| 80 | 12 hrs |
| 90 | 8 hrs |
| 100 | 4 hrs |
| 110 | 2 hrs 30mins |
| 120 | 1 hrs |
| 130 | 30 min |
| 140 | 25 mins |
| 150 | 20 mins |
- Heat ramp up rate – 2°C / min
- Pressure – 1 bar
Hot plate
| Temperature (°C) | Time |
| 80 | 210-240 |
| 90 | 100-160 |
| 100 | 35-45 |
| 110 | 22-30 |
| 120 | 10-15 |
| 140 | 3-6 |
Values are indicative of small samples of neat resin formulation. Gel times may vary significantly in composites depending on fibre content and laminate thickness.
Storage & Handling
Customers should ensure appropriate workplace OH&S guidelines are followed when working with this product. Appropriate measures should be taken to avoid contact with skin and eyes. Avoid inhalation of dust or fumes that may be released or created when machining, cutting or curing.
- Room temperature (23°C) > 6 weeks
- Refrigerated (-18°C) 12 months