Nap product with unidirectionally increased strength for producing carbon fiber reinforced plastic (cfrp) components

A production plant for producing a panel-shaped semi-finished product, comprising a partly strengthened assembly of at least one nap layer made of a non-woven fiber nap and at least one additional panel-shaped fiber layer, which at least one nap layer and at least one additional panel-shaped fiber layer, of said assembly are stacked face to face, wherein:

• the at least one nap layer and/or the at least one additional fiber layer are formed predominantly or completely from carbon fibers, aramid fibers or mineral fibers;
• the fibers contained in the nap layer have a preferred orientation;
• the face to face stacking of the assembly is formed exclusively by layering;
• the at least one nap layer and the at least one fiber layer are free from additional macro support elements;
• the additional fiber layer is stacked onto the at least one nap layer and is formed by a panel-shaped thread group from individual threads arranged next to each other;
• the thread group has an exclusive fiber orientation;
• and the nap product is partly strengthened by local connection points between the fibers of the different layers, the production plant comprising:
• at least one conveyor;
• a nap laying apparatus for laying a panel-shaped fiber nap on the at least one conveyor to form the at least one nap layer in the assembly of the semi-finished product;
• at least one thread group laying apparatus configured to stack to the nap layer the panel-shaped thread group from individual threads arranged next to each other with the exclusive fiber orientation by laying the thread group on the conveyor;
• and
• a strengthening device, to which the assembly is fed, and which is configured to generate local connection points between the fibers of the different layers, so that the semi-finished product is partly strengthened.

A production process for producing a semi-finished product comprising a partly strengthened assembly of at least one nap layer made of a non-woven fiber nap and at least one additional panel-shaped fiber layer, which at least one nap layer and at least one additional panel-shaped fiber layer, of said assembly are stacked face to face, wherein:

• the at least one nap layer and/or the at least one additional fiber layer are formed predominantly or completely from carbon fibers, aramid fibers or mineral fibers;
• the fibers contained in the nap layer have a preferred orientation;
• the face to face stacking of the assembly is formed exclusively by layering;
• the at least one nap layer and the at least one fiber layer are free from additional macro support elements;
• the additional fiber layer is stacked onto the at least one nap layer and is formed by a panel-shaped thread group from individual threads arranged next to each other;
• the thread group has an exclusive fiber orientation;
• and the nap product is partly strengthened by local connection points between the fibers of the different layers, the production process comprising the steps of:
• forming the assembly of the at least one nap layer from a non-woven fiber nap and the at least one fiber layer stacked to the at least one nap layer face to face, wherein the at least one nap layer and/or the at least one additional fiber layer are formed predominantly or completely from carbon fibers, aramid fibers or mineral fibers, and the fibers contained in the nap layer have the preferred orientation wherein the assembly stacked face to face is formed exclusively by layering, wherein the at least one nap layer and the at least one fiber layer are free from additional macro support elements;
• forming the at least one additional fiber layer by laying a web-shaped thread group from individual threads arranged next to each other with the exclusive fiber orientation;
• and
• partially strengthening the stacked assembly by generating local connection points between the fibers of the different layers.