| 摘要 |
<p>The invention relates to a process for preparation of a complex, which includes a) the production of a sheet associating in a juxtaposed manner at least one layer of a fibrous reinforcing structure and a layer of a thickening material that considerably thickens said sheet, b) the needle bonding of said sheet on the side of the fibrous reinforcing structure by means of barbed needles passing through at least said layer of a fibrous structure and at least partially through the layer of thickening material, the needles moving 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 and to the composite material obtained by impregnation of the complex. The invention makes faster impregnation of the complex possible during manufacture of the composite.</p> |
