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Fiberglass multiaxial fabrics are composite reinforcement materials made by arranging continuous fiberglass strands in multiple directions and securing them with stitching. Common orientations include 0°, 90°, +45°, and -45°, allowing the fabric to be tailored to different load requirements.
Compared with single-direction reinforcement, fiberglass multiaxial fabrics offer greater flexibility in fiber orientation and are widely used in wind energy, marine, automotive, construction, and other composite applications.
Fiberglass multiaxial fabrics are generally classified according to fiber orientation and the number of fiber layers. Fabric structure, areal weight, and fiber distribution can be adjusted to meet different application requirements.
Note: For example, a ±45° structure is commonly selected when shear or torsional loads are important, while a 0°/90° structure is suitable for components requiring reinforcement in the longitudinal and transverse directions. Quadraxial fabrics reinforce several in-plane directions.
Fiberglass multiaxial fabrics arrange continuous fiberglass strands at 0°, 90°, +45°, and -45° orientations and secure them through stitching. Compared with conventional woven fiberglass fabrics, the fibers have less interlacing and remain relatively straight, allowing loads to be transferred more directly along the fiber directions.
By adjusting the fiber distribution in different directions, the fabric can be designed to meet the tensile, bending, and shear requirements of a composite structure.
The stitched structure of fiberglass multiaxial fabrics leaves spaces between the fiber layers, allowing resin to flow through and wet the reinforcement. This makes them suitable for composite processes such as vacuum infusion and resin transfer molding (RTM).
The fabrics also offer good flexibility and can conform to curved surfaces, making them practical for laying up large or relatively complex composite components.
When a component requires reinforcement in multiple directions, fiberglass multiaxial fabrics can combine different fiber orientations within a single fabric structure. This can reduce some repeated layup operations and simplify the manufacturing process.
This feature is particularly useful for large composite components such as wind turbine blades, marine structures, automotive components, and FRP products.
Fiber orientations, number of layers, areal weight, and fiber distribution can be adjusted according to application requirements. This allows manufacturers and designers to select a fabric structure that better matches the load conditions and layup requirements of the finished component.
Glass fibers offer good resistance to corrosion and biological degradation and are not prone to rotting or mildew. When combined with a suitable resin system, fiberglass multiaxial fabrics can be used in composite structures exposed to moisture, outdoor conditions, and certain chemical environments.
Important: However, the long-term durability of the finished composite also depends on the resin system, fiber-resin interface, manufacturing quality, surface protection, and actual service conditions.
Fiberglass multiaxial fabrics are suitable for composite products where structural reinforcement and fiber orientation are important, including:
For large composite structures, the value of fiberglass multiaxial fabrics lies not only in reinforcement but also in their ability to optimize fiber orientation, simplify layup, and provide greater flexibility in composite design.
When selecting fiberglass multiaxial fabrics, consider the following factors:
✓ Fiber orientation: Choose 0°, 90°, ±45°, or a combination according to the primary load directions of the component.
✓ Areal weight: Select an appropriate fabric weight based on the required strength and overall layup design.
✓ Fiber distribution: Check the fiber weight and proportion in each direction to ensure the fabric matches the structural requirements.
✓ Fabric structure: Choose between biaxial, triaxial, quadraxial, or multiaxial fabrics with CSM according to the application.
✓ Resin compatibility: Confirm that the fabric provides suitable wet-out and processing characteristics with epoxy, vinyl ester, or other selected resin systems.
✓ Manufacturing process: Match the fabric structure to processes such as hand lay-up, vacuum infusion, or RTM.
✓ Final application: For large or load-bearing structures, confirm the final specification through structural design and process testing.
