Structures made of multi-layered ETFE foils
As the material is not fabric-reinforced, owing to its mechanical properties ETFE foil is used primarily in the form of air-filled cushions. The foil cushions can be equipped with multiple air chambers to attain low U-values.
The so-called "bubbles" are held in shape by air pressure in the cushions (approximately 300 to 800 Pa). Depending on the cushion geometry and the external loads, the individual cushions can span 4.50 metres, with no other supporting structure. Much greater spans are possible with additional tensile structure reinforcement. The supporting air supply and the control can be largely automated. Custom design concepts can provide the optimum solution for each project.
ETFE-cushion constructions retain their stability due to a pneumatically-generated synclastic design.
|Total weight (g/sq.m)||
175 or 0.036 lbs/sqft (at 100 μm)
|Tensile strength (N/mm2)||
Longitudinal direction 51 - 58
|Translucence||approx. 90 %|
|Colour|| highly transparent
printing and dyeing possible
|Fire classification|| DIN 4102 B1
EN 13501-1 / B-s1,d0