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Over the past few years, woven roving glass fibre materials have become one of the most highly valued reinforcements in composite manufacturing. Known for their strength, durability, and versatility, woven roving fabrics are widely used across industries such as marine, aerospace, military, chemical processing, construction, and sports goods manufacturing.
In composite construction, woven roving fabrics are produced by weaving continuous glass fibre rovings in specific directions—typically at 0° and 90° orientations. This bidirectional alignment provides exceptional strength and load distribution, giving woven roving a decisive advantage over many other reinforcement fabrics.
This article explores woven roving glass fibre fabrics, including their characteristics, reinforcement options, fibre compositions, and key applications.
Woven roving is a heavy, coarse fabric produced by weaving continuous glass fibre rovings in a plain weave pattern. The interlacing of fibres creates a strong, stable reinforcement that is ideal for high-strength composite laminates.
During manufacturing, the glass filaments are tightly interwoven, resulting in:
One of the major advantages of woven roving glass fibre fabric is its compatibility with a wide range of resin systems, including polyester, vinyl ester, and epoxy resins.
Woven roving fabrics are valued for their balance of strength, stiffness, and cost-effectiveness. Key characteristics include:
Ideal for structural laminates requiring rigidity and load-bearing capacity.
Works well with most thermoset resin systems.
Available in various weights, weave styles, widths, and surface finishes.
Commonly used where chopped strand mat alone would be insufficient.
In composite laminates, fibres are incorporated into liquid resin, which then cures into a rigid structure. The fibres serve as the primary reinforcement, while the resin binds and transfers loads—together creating a strong, durable composite.
Several reinforcement materials are commonly used alongside or instead of woven roving, depending on the application:
Fabric weight (measured in ounces per square yard or grams per square metre) directly affects strength and rigidity. Heavier fabrics generally provide higher strength but increase laminate weight. Selecting the right balance is key to optimal performance.
Plain woven roving fabrics use interlaced fibres to create stability and strength. Different weave patterns affect drape, wet-out, and mechanical performance.
The fibre type significantly influences performance and cost:
The most economical and widely used glass fibre; offers good strength and excellent value.
Chemically treated for higher strength and stiffness than E-glass
Lightweight, extremely stiff and recognisable by its black appearance; widely used in aerospace and high-performance applications
Highly impact-resistant and lightweight; ideal for areas exposed to high force or abrasion
Woven roving glass fibre fabrics are used in a wide range of demanding applications, including:
Due to its coarse weave, woven roving can create voids if not properly wet out. Careful resin application is essential to ensure full impregnation and avoid excess resin weight.
Handling Tip: Never fold woven roving fabric, as this can damage the fibres. Always roll it into a tube to prevent creasing and ensure consistent laminate quality.
Woven roving is used as a structural reinforcement in composite laminates where high strength, stiffness, and durability are required, such as boat hulls, tanks, and industrial panels.
Woven roving provides directional strength and higher load-bearing capacity, while chopped strand mat offers omnidirectional reinforcement and better conformity to complex shapes.
Woven roving glass fibre fabrics are compatible with polyester, vinyl ester, and epoxy resins, making them suitable for a wide range of composite manufacturing processes.
Woven roving is best for flat or gently curved surfaces. For complex shapes, it is often combined with chopped strand mat to improve conformity.
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