Method for producing single- or multi - layered fiber preforms by the tfp process as well as a backing layer

Abstract From the Canadian patent

The invention relates to a method for producing single- or multi-layered fiber preforms 1 25 by the TFP , process with fiber strands 4-16 which are aligned substantially such that they are oriented with the flux of force, are laid on a backing layer 2 and are attached by fixing threads 17, in order to form a fiber preform 1, 25 with virtually any desired material thickness and without a troublesome backing layer 2. According to the invention a release layer 3, 26 is , applied at least in certain regions to the backing layer 2 and, after completion of the TFP process the , fiber preform 1, 25 is introduced into a fixing device 24, in which at least some of the fixing threads 17 are …