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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 8.0 - 10.0 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
80
90
110 Test method
Compression strength Mpa
1.8
2.5
3.5 ASTM C365-57
Compression modulus Mpa
110
130
160
Shear Strength Mpa
0.8*
1.2*
1.5*
ASTM C273-61
Shear Modulus Mpa 12*
19*
26*
Flatwise tensile strength Mpa
2.5*
4*
5*
ASTM C297-61
Climbing drum peel strength N.mm/mm 80 90 125 ASTM D1781

* Minimum values, which are expected to be guaranteed in the production of larger panels;
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)