SIGRAPREG® 245 g/m² carbon fabric prepreg in a 2/2 twill weave, 120 cm wide, pre-impregnated with a toughened epoxy resin system.
For high-quality CFRP laminates with controlled resin content, reproducible laminate quality and good drapability.
REFRIGERATED STORAGE REQUIRED
SIGRAPREG® C W245-TW2/2/AQ-E323/45% from SGL Carbon is a ready-to-lay carbon fabric prepreg with 45% epoxy resin by weight. The 2/2 twill weave provides good drapability over curved component surfaces. Factory-controlled resin impregnation eliminates manual fabric wet-out and supports consistent laminate thickness and reproducible processing.
Technical data
| Product designation |
SIGRAPREG® C W245-TW2/2/AQ-E323/45% |
| Reinforcement |
Woven carbon fibre fabric |
| Weave |
2/2 twill |
| Dry fibre areal weight |
245 g/m² |
| Resin system |
Toughened E323 epoxy |
| Resin content |
45% by weight |
| Prepreg areal weight |
445 g/m² |
| Fabric width |
120 cm |
| Uncured prepreg thickness |
approx. 0.31 mm |
| Laminate thickness per ply |
approx. 0.23 mm at 60% fibre volume fraction (consolidated) |
| Tack |
Medium |
| Curing temperature |
80–160 °C, depending on process |
| Typical cure cycle |
125 °C / 60 minutes (SGL guideline) |
| Processing methods |
Out-of-autoclave vacuum bagging, hot pressing, autoclave |
Typical applications
- Structural CFRP components, shells and technical fairings
- Body panels and air ducts for motorsport and automotive applications
- Lightweight sandwich skins and compression-moulded CFRP components
- Drone, UAV and model aircraft components
- Sports equipment and technical lightweight structures
- Prototypes and components requiring reproducible laminate quality
Properties and processing
The toughened E323 epoxy resin system offers controlled resin flow during curing. The consistent resin content and medium tack facilitate accurate positioning and temporary fixing of multiple plies. The twill weave conforms well to curved mould surfaces.
Out-of-autoclave (OoA) vacuum bag processing is recommended. Hot pressing and autoclave curing are also possible. The SGL data sheet specifies a typical cure at 125 °C for 60 minutes, with alternative curing temperatures from 80 to 160 °C. Heating rate, pressure and dwell time must be matched to the component design and manufacturing process. A general heating rate of 1–4 °C/min is recommended.
No additional resin impregnation is required. Careful lay-up, sufficient vacuum and a suitable cure cycle are essential for achieving a low-void laminate structure.
Storage and important warnings
Shelf life depends on storage temperature:
- At −18 °C: 1 year
- At +20 °C: 90 days
WARNING – COLD CHAIN: Store the prepreg under the specified refrigerated conditions. Prolonged or repeated exposure to higher temperatures may adversely affect processability and shelf life.
IMPORTANT – THAWING: Allow the material to reach room temperature while still sealed in its protective packaging. Prevent condensation from forming on the prepreg.
RETURNS: Due to the temperature-sensitive nature of this material, voluntary returns and exchanges are excluded. Interruptions to the cold chain may significantly reduce shelf life or render the prepreg unusable. Statutory rights remain unaffected.
SAFETY: The uncured epoxy resin may cause skin and eye irritation and allergic skin reactions. Wear suitable protective gloves and eye protection. Refer to the safety data sheet.
MSDS Carbon fabric prepreg 245 g/m² (PDF)
