Technical data
General information
FITS Panel thickness 8 - 10 mm,
Facings: 2/2 glass fabric, style 7781, PEI resin impregnated (32 ± 1%) and consolidated,
ABS5036-A02, Ten Cate(Cetex) at both sides.
| FITS panel, 2/2, in-situ foam/ thickness |
85 kg/m³, 10mm 5.3 pcf, 0.395 inch |
90 kg/m³, 8 mm 5.6 pcf , 0.315 inch |
90 kg/m³, 6 mm 5.6 pcf, 0.24 inch |
test limit | Nomex, 48 kg/m³, 3 pcf , 2/2 ,11 mm, 0.43 inch, epoxy adh. |
| 4-point bending max. load * |
858 N A-t 193 lbf (Airbus-tested) |
810 N 182 lbf (Test FITS T.) |
645 N 145 lbf (Airbus-tested) |
700 N 157 lbf |
730 N (L-dir.) 164 lbf (Test FITS T.) |
| Maximum* bending displacement | 21 mm 0.82 inch |
24 mm 0.95 inch |
35 mm 1.4 inch |
15 mm 0.6 inch |
|
| 4-pnt bending max. load* 80 °C, 176 °F |
730 N A-t, 164 lbf 85% retention |
675 N, 152 lbf 85 % retention |
500 N 112 lbf 71 % |
65% retention | |
| Max. bending* displacement | 20 mm 0,79 inch |
||||
| Panel weight g/m², Lb/ft², |
2570 g/m² 0.52 Lb/ft² |
2440 g/m² 0.5 Lb/ft² |
2300 g/m² 0.47 Lb/ft² |
2435 g/ m² 0.5 Lb/ft² |
Mechanical properties
Preliminary data sheet
FITS Panel thickness 8 - 10 mm, 0.4 - 0.46 inch
Facings: 1/1, 1/2 or 2/2 glass fabric, style 7781, PEI resin impregnated (32 ± 1%) and consolidated, ABS5036-A02 (Cetex) at both sides.
| Density in-situ foam |
kg/m³ pcf |
80 5 |
90 5.6 |
110 6.85 |
Test method |
| Compression strength | Mpa psi |
1.8 260 |
2.5 360 |
3.5 500 |
ASTM C365-57 |
| Compression modulus | Mpa psi |
110 16,000 |
130 18,500 |
160 23,000 |
|
| Shear Strength | Mpa psi |
0.8* 115 |
1.2* 175 |
1.5* 220 |
ASTM C273-61 |
| Shear Modulus | Mpa psi |
12* 1750 |
19* 2750 |
26* 3750 |
|
| Flatwise tensile strength | Mpa psi |
2.5* 360 |
4* 580 |
5* 720 |
ASTM C297-61 |
* Minimum values, which are expected to be guaranteed in the production of larger panels, the actual values are 10 - 15 % higher.
FITS panels can be manufactured with a thickness of 5 upto 25 mm and a density of 85 - 250 kg/m³. Thermoplastic facings can be glass-, aramid- or carbon fiber reinforced with PEI. Maximum thickness of the fiber reinforced layer is around 0.7 mm.
Impact properties
| FITS panel 2/2 US style 7781 PEI cons. In-situ foam PEI 85 kg/m³, 10mm, 0.394 inch |
FITS panel 2/2 US Style 7781 PEI cons. In-situ foam PEI 90 kg/m³, 8 mm, 0.315 inch |
Nomex 48 kg/m³, facings 2/2 ABS5036- A02, epoxy adh. 10 mm, 0.394 inch |
Nomex 48 kg/m³, 2/2 Style 7781, phenolic 10 mm, 0.393 inch |
Impact testing | |
| Gardner impact test | 10 inch/lb, dent, local no change in structural integrity | 9.3 inch/lb, honeycomb crushed, local no structural integrity |
Gardner impact test | ||
| Part manufacturer test results |
About equal, dent, local no change in structural integrity |
About equal, dent, local no change in structural integrity |
About equal, honeycomb crushed, local no structural integrity |
Part manufacturer test results |
Recyclable at part level
In the future FITS parts can be recycled by:
1: Grinding and use it as short fiber injection molding material.
2: Solving the PEI from the parts, removing the solvent and re-use the PEI polymer in the
manufacturing of films.
Grinding the glass fiber and melt the fibers to reuse it as glass
3: Solving the polymer and use the solution in the manufacturing of prepreg by solvent impregnation.
Grinding the glass fiber and melt the fibers to reuse it as glass.
Flammability
Flammability test results of FITS panels at Airbus in Bremen.
| Panel configuration | 2/2* | 2/2* | 2/2+dec. | 2/2 + dec. | Limit |
| Panel thickness mm / inch | 6 / 0.24 | 10 / 0.394 | 6 / 0.24 + dec. | 10 / 0.394+ dec. | |
| Panel weight kg/m²/ lb/ft² | 2.26 / 0.46 | 2.58 / 0.53 | 2.26 / 0.46 | 2.58 / 0.53 | |
| Foam density kg/m³/ lb/ft³ | 90 / 5.6 | 85 / 5.3 | 90 / 5.6 | 85 / 5.3 | |
| Decoration film | PSA | PSA | |||
| OSU-total 2 min. kW/m² HR |
8 | 8 | 28 | 27 | 65 |
| OSU - peak in 5 min. kW/m² HRR |
25 | 32 | 32 | 32 | 65 |
| Smoke density | 3 | 1 | 57 | 52 | 150 |
| Vertical Bunsen, 12 sec. Burn length mm / inch After flame time(s) After flame time drips |
57 / 2.24 0 0 |
57 / 2.24 0 0 |
64 / 2.52 0 0 |
48 / 1.89 0 0 |
203 / 8 15 0 |
| Vertical Bunsen, 60 sec. Burn length mm / inch After flame time(s) After flame time(s) drips |
118 / 4.6 0 0 |
92 / 3.62 0 0 |
125 / 4.92 0 0 |
93 / 3.66 0 0 |
152 / 6 15 3 |
* Number of layers consolidated PEI US-style 7781 glass fabric (ABS5036-A02)