Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Product Highlights
- Low temperature initial cure from 55°C
- Free standing post cure
- Good surface finish
- Suitable for a range of tools
- Excellent shelf life
- Wide range of fiber substrates available
- Made in Australia
Applications & Uses
- Markets
- Composites Processing Methods
- Applications
EP-250 can be used to produce high temperature resistant composite tools with carbon, glass or aramid fibers. The versatility of EP-250, means large complex tools as well as small basic components can be produced. The EP-250 prepreg can be used to take splashes from existing parts, that have been properly prepared, for repair or reverse engineering Applications
Properties
- Cured Properties
| Value | Units | Test Method / Conditions | |
| Flexural Strength (at 23°C) | 60 - 70 | MPa | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Ultimate Elongation (at 23°C) | 1.5 – 2.0 | % | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Flexural Modulus (at 23°C) | 3300 - 3400 | MPa | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Tensile Strength (at 23°C) | 28 - 30 | MPa | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Ultimate Elongation (at 23°C) | 0.8 – 1.0 | % | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Tensile Modulus (at 23°C) | 3200 - 3300 | MPa | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
| Tg (DMA, RT - 300°C, 2°C /min) | 180 - 200 | °C | Cured neat Formulation Cycle for 24hrs at 65°C + 2hrs at 120°C + 2hrs at160°C + 2hrs at 200°C |
Technical Details & Test Data
- Curing
The cure cycle for EP-250, listed below, is a guide only. It is recommended the customer trials their own cure cycle depending on the size and complexity of the tool.
Initial Cure- Apply a minimum of 26 inches of Hg vacuum
- Apply 6 bar of autoclave pressure. Vacuum may be vented at 1 bar if desired.
- Heat laminate at a rate of 0.5 -1.0°C / min. until a cure temperature of 65 – 70°C
- Hold the laminate at 65-70°C for a dwell time of 24 hours
- Cool the laminate under pressure to 30°C at 3°C
Post Cure- Heat at 1-2°C / min to 60°C and hold for 2hrs
- Heat at 1-2°C / min to 100°C and hold for 2hrs
- Heat at 1-2°C / min to 140°C and hold for 2hrs
- Heat at 1-2°C / min to 180°C and hold for 2hrs
- Heat at 1-2°C / min to 200°C and hold for 5hrs
- Cool to room temperature at a rate of 3°C / min
or- Heat at 1-2°C / min to 60°C
- Heat at 10°C hour to 200°C and hold for 5 hours
- Cool to room temperature at a rate of 3°C / min
- Gel Time
Hot plate
Temperature (°C) Time 50 1000 60 560-580 90 75-80 100 40-45 120 10-15 Values are indicative of small samples of neat resin formulation. Gel times may vary significantly in composites depending on fiber content and laminate thickness.
Storage & Handling
- 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.
- Shelf Life
- Room temperature (23°C) > 3 weeks
- Refrigerated (-18°C) 12 months