Manufacturing and sales for the carbon fiber composite materials (except prepreg for aircraft) are handled by ENEOS Techno Materials Corporation.
ENEOS's tow prepreg is a tow (fiber bundle) product that is preimpregnated with resin. By using tow prepregs with the filament winding (FW) method, a forming method used in CF shaft and gas cylinder production, high productivity can be achieved.
Combining our independently developed resins with not only pitch-type and PAN-type carbon fibers but with customer-requested fibers, such as glass fibers and engineering plastic fibers, we develop tow prepregs according to the needs of our customers.
Using tow prepreg, the dry method achieves high productivity and workability improvements compared to the wet (conventional) method.
Wet method (conventional method)
Dry method (using tow prepreg)
|Wet method||Dry method|
|Nonuniform||Uniformity of resin content||Uniform|
|60-100 m/min||Winding speed||Up to 300 m/min|
|Yes||Slips during winding||No|
|6-8 hours||Resin room temperature life||1 month|
Variation in resin content
As with sheet prepreg, our independently developed resin is used. An example is shown below.
|Resin Type||Curing Condition||Glass Transition Temperature|
|General purpose epoxy||130℃ / 2hr||130℃|
|Toughened epoxy||130℃ / 2hr||130℃|
|High heat-resistant epoxy||180℃ / 2hr||180℃|