Touch detection device with touch interface made of composite material
A touch detection device comprises a touch interface ( 1 ) made of composite material comprising a lignocellulosic material and a resin, the lignocellulosic material being impregnated with the resin, the fraction of resin being between 30% and 80% by weight relative to the total weight of composite material. The resin impregnated makes it possible to render the touch interface stable irrespective of the temperature and moisture conditions with a view to use both outside and inside. Use of the touch detection device for a touchscreen.
1 . A device comprising a touch interface,
wherein the touch interface comprises a composite material derived from a lignocellulosic material,
wherein the composite material comprises: (1) lignin, (2) a network of cellulose and hemicellulose that is preserved from the lignocellulosic material, and (3) a polymerized filler compound,
wherein the composite material is at least partially translucent, wherein the touch interface is at least partially translucent,
wherein the composite material has (i) a maximum stress at breaking greater than the lignocellulosic material as determined by a bending measurement, or (ii) a maximum stress at breaking greater than the lignocellulosic material as determined by an axial compression measurement, and
wherein the composite material is compressed relative to the lignocellulosic material.
2 . The method of claim 1 , wherein the composite material comprises a three-dimensional structure of the cellulose and the lignin.
3 . The method of claim 2 , wherein the three-dimensional structure comprises hydrogen bonds.
4 . The device of claim 1 , further comprising a display device configured to display information to the user.
5 . The device of claim 1 , wherein an outer surface of the touch interface comprises a grain of the composite material, and is configured for a user to touch the grain of the composite material when inputting information into the device.
6 . The device of claim 1 , wherein the composite material has a density that is from about 5% to 1000% greater than a density of the lignocellulosic material.
7 . The device of claim 1 , wherein the polymerized filler compound is present at most about 80%, by mass, relative to a total mass of the composite material.
8 . The device of claim 1 , wherein the composite material comprises at least two sheets of composite material.