Tire using a reinforcing structure with fibres of flattened cross section

摘要

A tire comprising an airtight rubber cover (2) and a reinforcing structure essentially formed of a plurality of fibers (30, 40) embedded in the rubber and arranged in layers, this reinforcing structure comprising at least one carcass layer (3) and one crown layer (4). The fibers (30) and (40) of these layers (3, 4) are connected together and oriented, with respect to the median plane (P) of the tire, at respective angles of the order of 90 degrees and 0 degrees, each of these fibers (30, 40) also having a connected cross section of flattened shape.

主权项

1. A tire comprising an airtight rubber cover and a reinforcing structure essentially formed of a plurality of fibres individually embedded in the rubber and arranged in several layers, wherein:
the reinforcing structure is formed of a carcass layer, of a crown layer, and of connecting means, each fibre of the carcass layer makes a first angle of between 75 and 90 degrees with a median plane perpendicular to the axis of the tire, each fibre of the crown layer makes a second angle of between 0 and 15 degrees with the median plane of the tire, at least some of the fibres of the carcass layer and at least some of the fibres of the crown layer each have a completely connected cross section of flattened shape with first and second mutually orthogonal dimensions of which the first, or thickness, is less than the second dimension, or width, and runs in a substantially radial direction of the tire, said fibres of flattened cross section are made of a material chosen from the group comprising steel, aluminium, glass, a polymer belonging to the family of polyester, polyethylene, polyamide, aramid or polyvinyl alcohol, a composite formed of filaments of glass or of such a polymer embedded in a resin, and a composite of polyethylene filaments coated with resorcinol-formaldehyde-latex, the connecting means comprise at least connecting points directly and individually connecting the fibres of flattened cross section belonging to the carcass layer to each fibre of flattened cross section belonging to the crown layer, the carcass layer and the crown layer thus together forming a grid structure, the fibres of flattened cross section belonging to the carcass and crown layers are made of a composite formed of filaments embedded in a primary and secondary resin, and the connecting points are created by connecting the secondary resin of the fibres of the carcass layer with the secondary resin of the fibres of the crown layer.