Integral sail and corresponding method of production

Integral sail to generate a propulsion following a thrust from the wind, comprising:

• an integral layered structure delimited externally by a first external layer and by a second external layer, both made with a smooth layer of thin and continuous film of flexible material, and in that to each of said first external layer and second external layer at least a first layer of parallel fibers, adjacent to each other, is associated internally with respect to said layered structure, wherein at least the first layer of parallel fibers cooperating with the first external layer provides its fibers disposed parallel also to the fibers of another layer of parallel fibers cooperating with the first external layer and parallel to the fibers of the first layer of parallel fibers cooperating with the second external layer, the whole being made solid by means of at least a layer of thermofusible glue, disposed inside said first external layer and second external layer and in coordination with the corresponding layers of parallel fibers,
• wherein between the layers of parallel fibers there are reinforcement fibers substantially disposed at an angle relative to the layers of parallel fibers;
• and
• a multilayer sandwich defined by the overlapping of two components each comprising said first and second external layers and the associated layers of parallel fibers, and in that said sandwich is formed into an integral structure by means of pressure and heating.

Integral sail to generate a propulsion following a thrust from the wind, comprising:

• an integral layered structure delimited externally by a first external layer and by a second external layer, both made with a smooth layer of thin and continuous film of flexible material, and in that to each of said first external layer and second external layer at least a first layer of parallel fibers, adjacent to each other, is associated internally with respect to said layered structure, wherein at least the first layer of parallel fibers cooperating with the first external layer provides its fibers disposed parallel also to the fibers of another layer of parallel fibers cooperating with the first external layer and parallel to the fibers of the first layer of parallel fibers cooperating with the second external layer, the whole being made solid by means of at least a layer of thermofusible glue, disposed inside said first external layer and second external layer and in coordination with the corresponding layers of parallel fibers;
• wherein each layer of parallel fibers is formed by strips of one-directional and parallel fibers disposed parallel and adjacent to each other, wherein said strips of one-directional and parallel fibers are at intervals with one another, are laid above the first external layer and the second external layer, are disposed at an interval chosen between 0 mm and 20 mm and have a width chosen between 5 mm and 50 mm.

Integral sail to generate a propulsion following a thrust from the wind, comprising:

• a first external layer having an external surface and an inwardly facing inner surface, the first external layer comprised of a film of flexible material;
• a first glue layer deposited on the inner surface of the first external layer;
• a first layer of parallel fibers disposed adjacent the first glue layer;
• a second glue layer disposed inwardly relative to the first layer of parallel fibers;
• a second layer of parallel fibers disposed inwardly relative to the second glue layer;
• wherein fibers of the first and second layers of parallel fibers are oriented substantially parallel to one another;
• and
• wherein the foregoing layers form an integral sandwich structure upon application of heat and pressure.