Pneumatic deicing device for breaking and removing an ice deposit accumulated on the outer surface of an aircraft
View Patent ↗A pneumatic deicing device ( 1 ) is provided for breaking and removing an ice deposit accumulated on the outer surface ( 2 ) of an aircraft, in particular on an airplane wing. The device ( 1 ) includes an outer layer ( 15 ) intended to withstand the outside environment, an inner interface layer ( 50 ) intended to be connected to the outer surface ( 2 ) of the aircraft, and at least two outer ( 30 ) and inner ( 40 ) intermediate layers connected to one another by an array of stitches ( 36 ) so as to define deicing chambers ( 35 ) that can be inflated quickly to cause a mechanical action to break the ice. The outer intermediate layer ( 30 ) includes a knit textile layer ( 34 ). At least one interlayer ( 20; 32 ) made from polar elastomer material is arranged above the knit textile layer ( 34 ) and immediately in contact with the outer layer ( 15 ) and the knit textile layer ( 34 ).
1. A pneumatic deicing device for breaking and removing an ice deposit accumulated on the outer surface of an aircraft, comprising at least:
an outer layer made from polyurethane intended to withstand an outside environment, preferably,
an inner interface layer connected to the outer surface of the aircraft, and
at least an outer intermediate layer and an inner intermediate layer connected to one another by an array of stitches spaced apart so as to define deicing chambers that can be inflated quickly using injected pressurized air so as to create an expansion of the device causing a mechanical action to break the ice, the outer intermediate layer being made of a deformable knit textile layer that is elastically deformable under the effect of the inflation,
at least one interlayer made from polar elastomer material and arranged above the knit textile layer of the outer intermediate layer and immediately in contact with both the outer layer and the knit textile layer,
wherein the polar elastomer material of the at least one interlayer is epichlorohydrin, and
wherein the at least one interlayer is secured in contact with at least one of the outer layer and the knit textile layer of the outer intermediate layer without an intermediate layer or glue therebetween.
2. The device of claim 1 , wherein the interlayer made from epichlorohydrin is calendared with the outer layer or with the knit textile layer.
3. The device of claim 1 , wherein the interlayer made from epichlorohydrin is connected to the knit textile layer by a chemical bond.
4. The device of claim 1 , wherein the epichlorohydrin interlayer includes two superimposed interlayers arranged between the knit textile layer and the outer layer.
5. The device of claim 4 , wherein the outer layer is made from vulcanizable elastomer polyurethane, and the outer layer and the epichlorohydrin interlayer are connected to one another by chemical co-vulcanization bonds.
6. The device of claim 1 , wherein the epichlorohydrin has a glass transition temperature below about −50° C.
7. The device of claim 6 , wherein the epichlorohydrin is a ter-polymer.
8. The device of claim 1 , wherein the thickness of the assembly formed by the outer layer and all of the epichlorohydrin interlayer or is between about 0.6 mm and 1 mm.