Carbon multiaxial reinforcements are fabrics that consist of two or more plies or layers of parallel oriented carbon yarns or rovings, showing a perfect reinforcement configuration. Each individual layer can be oriented in a different axis and for this reason the fabric construction is called ‘multi-axial’. Depending on the number of layers and varying orientation and axis, a unidirectional (UD), bi-axial (Biax), tri-axial and quadri-axial assembly can be made into a Non-Crimp Fabric (NCF) system.
The various layers are held together with a stitched thermoplastic (TP) yarn (typically polyester) which prevents crimping or undulations that can lead to loss of performance in the finished laminate. This ensures the highest values for strength and stiffness.
The stitching also enables easier handling as the fabric remains intact even when cut. The straight, non-crimped carbon fibers within a multiaxial fabric system allow very good resin impregnation and wet-out, perfect for infusion and all closed molding processes. The stitching helps the diffusion of resin vertically through the layers (in Z direction).
Carbon multiaxial reinforcements are used where the highest tensile, flexural and compression strength and minimal print-through is needed.
The multiaxial fabric is suitable for all normal processes like hand lay-up, RTM, Pultrusion, Infusion and Vacuum.
Typical end-uses: aerospace, military, constructional parts, medical applications, Marine, sports goods and automotive.