Kevlar prepreg is manufactured by the infusion of para-aramid fiber fabrics with a controlled amount of epoxy resin.
All our prepregs are protected with wax paper on one side and plastic film on the other. They come in rolls of 1m / 1.27m wide; Length is 50/100 meters.
We have Kevlar prepregs in Plain and Twill weaves. Kevlar is not only available in yellow but also blue, red, green etc.
List of Kevlar prepregs |
|||||
| Fiber Type | dry weight | resin
content |
final weight | thickness | Available Widths |
| 600D | 100 gsm | 35% | 155 gsm | 0.1mm | 1-1.27m |
| 1000D | 150 gsm | 40% | 250 gsm | 0.15mm | |
| 1500D | 200 gsm | 40% | 330 gsm | 0.20mm | |
| 3000D | 300 gsm | 40% | 500 gsm | 0.35mm | |
Methods of Curing
Our Prepregs are extremely convenient to work with and can be processed in a variety of methods:
- Autoclave
- Out of Autoclave
- Heat-press molding
- Heat-shrink roll wrapped
Ideal curing process for our prepregs
Once you take out the prepreg from the freezer, let it defrost overnight.
For curing, first cure it at about 80C for about 30 minutes
Then raise to 120C, for 120 minutes.. If 130 C, only 60 minutes. About 4 hours if at 100 C
Wait untill the temperature lowers to 60 C , then remove mould
The above curing process for our default/standard resin system, we also supply prepregs made using other epoxy resin systems with different Tg and curing temperatures.
| List of Resin systems used in prepregs by CA Composites | |||
| Resin Name | Tg | Curing | Remarks |
| TNYPH-23 | 100-110 | 120 minutes at 90 C + 120 minutes at 100 C | standard resin/slightly lower curing temp |
| TNYPH-42 | 120-130 | 30 minutes at 80 C + 100-120 minutes at 120-125C | standard tg/standard curing temp |
| JS-YPH170 | 175-180 | 30 minutes at 80 C + 90 minutes at 150 C | moderately high tg |
| TN-YPH170 | 170-190 | 30 minutes at 80 C + 45 minutes at 160 C | moderately high tg |
| JS-YPH200 | 195-205 | 30 minutes at 150 C + 120 minutes at 200 C (after cure) | highest Tg |
| TN-FR-Epoxy | 120-130 | 30 minutes at 80 C + 30 minutes at 150 C (or 90 minutes at 120 C) | Flame Retardant/ UL94 V-0 compliant |
| JS-FR-Epoxy | 120-130 | 30 minutes at 80 C + 90 minutes at 120 C | Flame Retardant/ UL94 V-0 compliant |
| JS-YPH150 | 140-150 | 5-10 minutes at 150 C | Super fast curing and moderately high tg |
Storage and Transportation
Our Prepregs can be stored at room temperature for about a month hence do not require freezer bags for transportation. But if you store it in a freezer at about -18°C then it can last more than 6 months.
We also supply carbon fiber prepreg and fiberglass prepregs.