Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Applications & Uses
- Markets
- Applications
- Composites End Use
- Composites Processing Methods
- Applications
- Remove material from cold storage at least 20 hours prior to use to allow for stabilization at room temperature. Keep the material wrapped to prevent moisture from condensing on the adhesive. If details are cut and replaced into cold storage, shorter stabilization times may be used. Cut the material to size, remove the release paper and apply to part or mold. Remove the separator paper and join the parts together. Parts are now ready to be bonded and may be cured in a press, autoclave, or vacuum bag in an oven. Apply at least 30 psi pressure.
Properties
- Physical Properties
- Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Volatiles | max. 1 | % | — |
| Resin Content | 42 | % by Weight | — |
| Uncured Weight | 0.27 | lbs./sq ft | — |
| Thickness | 0.010” per ply | — | — |
| Cured | The cured properties were obtained using a press cure of two hours at 275°F with 25 followed by a post cure of 350°F for 4 hours. | psi | — |
| Thickness | 0.0085” per ply | — | — |
| Void Content | max. 1 | % | — |
| Value | Units | Test Method / Conditions | |
| Flexural Strength at 250°F | 106000 | psi | — |
| Flexural Strength at 75°F (24°C) | 206000 | psi | — |
| Flexural Modulus at 250°F | 5.8 | Msi | — |
| Flexural Modulus at 75°F (24°C) | 6.25 | Msi | — |
| Tensile Strength at 250°F | 102000 | psi | — |
| Tensile Strength at 75°F (24°C) | 150000 | psi | — |
| Tensile Modulus at 250°F | 6.6 | Msi | — |
| Tensile Modulus at 75°F (24°C) | 6.4 | Msi | — |
| Beam Shear | 10328 | psi | — |
Technical Details & Test Data
- Cure Cycle
DA 4518 is designed to cure in one hour at 250F (121C), however this system may be cured at 250F for one hour and a post cure of 350F for one hour. It can also be cured at 350°F for 1 hour. If properties over 200ºF are required you must Postcure to 350ºF. The times of the cure cycle are the actual part temperature for the designated time, not mold or oven temperature. The prepreg may be cured using either standard heat-up methods or by in-hot, out-hot press applications. A pressure of 30 psi is recommended, however pressures of 10 to 50 psi may be used.
Storage & Handling
- Shelf Life
- 6 Months (40°F), 1 Year (0°F), 30 Days (75°F)
- Storage
Store material in a contaminate free container and store at O degrees F for extended storage. For shorter storage time requirements store at 40 degrees F, this enables quicker stabilization times.