NEEDLE BONDED COMPLEX

摘要

A process for preparation of a complex for resin impregnation includes the production of a sheet having at least one layer of a fibrous reinforcing structure and a layer of a thickening material that considerably thickens the sheet, the layers associated in a juxtaposed manner. The process also includes needle bonding of the sheet on the side of the fibrous reinforcing structure by means of barbed needles. The barbed needles pass through at least the layer of a fibrous reinforcing structure and at least partially through the layer of thickening material. The needles move in the direction of the sheet at essentially the same speed as the sheet when they pass through it, with an impact density ranging from 1 to 25 impacts per cm2. The invention also relates to the complex made by the process and to a composite material obtained by impregnation of the complex. The invention makes faster impregnation of the complex possible during manufacture of the composite.