Regarding the still-increasing interest in that dry way of manufacturing fibreglass products, we developed an alternative keeping all the advantages of working with prepreg, adding still something more. Considering a narrow relationship to prepreg technology, we called our alternative “semipreg” (i.e. fabric being one-side impregnated with foil-like resin).
Semipreg is a fabric impregnated from one side with foil resin LETOXIT LFX. The result is a great variability of the resulting semipreg composition because we can come from a wide offer of LETOXIT LFX resins. In addition to basic types, this allows us to also use semipreg with high thermal resistance (250°C), high impulse toughness, or semipreg complying with requirements of FAR 23 & FAR 25 standards.
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ADVANTAGES
- solvent free technology (no hazard vapours released during the prepration and curing
- faster production in comparison with liquid resins
- great variability in composition
- customer made
- non-flammable versions (FAR 23, FAR 25, EN 45 545)
APPLICATION
- aviation
- automotive
- shipbuilding
- composite panel sandwich production
- health care
- sport equipment
| Semipreg LETOXIT | Area weight (g/m2) | Ratio Reinforcement/Resin (%) | Curing | Characteristics |
| SGG 0101 | 456 | 47/53 | 60 min / 120°C | waves permeable (RF), aviation, satellites, radomes |
| SGG 0301 | 400 | 50/50 | 60 min / 120°C | self extinguishing (FAR 23) |
| SGG 0601 | 600 | 50/50 | 45 min / 120°C | non – flammable (DIN 5510-2) |
| SGG 5001 | 650 | 60/40 | 30 min / 120°C | fast curing |
| SGG 0105 | 400 | 50/50 | 60 min / 120°C | all – purpose application (glass) |
| SGC 0206 | 400 | 50/50 | 60 min / 120°C | all – purpose application (carbon) |
| SGC 0506 | 440 | 45/55 | 30 min / 120°C | fast curing, higher ratio of resin, nice surface |
| Semipreg LETOXIT | Fabric (type, g/sqm, weave) | Resin (type, g/m2) | Temperature resistance (°C) |
| SGG 0101 | glass, 216 g/sqm, satin | epoxid, 240 g | 100 |
| SGG 0301 | glass, 200 g/sqm, plain | epoxid, 200 g | 135 |
| SGG 0601 | glass, 300 g/sqm, twill | fenol, 300 g | 103 |
| SGG 5001 | glass, 390 g/sqm, twill | epoxid, 260 g | 100 |
| SGG 0105 | glass, 200 g/sqm, plain | epoxid, 200 g | 100 |
| SGG 0206 | carbon, 200 g/sqm, plain | epoxid, 200 g | 125 |
| SGG 0506 | carbon, 200 g/sqm, plain | epoxid, 240 g | 125 |
In case you didnt find the right composition of materials, our semipregs can be combined with any of our epoxy foil resins LETOXIT LFX.
Without the change of properties, the semipreg can be stored for 1 month at +20°C, for 4 months at 5°C and up to 1 year for –18°C. The temperature +30°C mustn’t be crossed during transport and storage.
