High-Performance Glass Fibre Rectangular Bar - Polyester Matrix, Excellent Mechanical Properties, and Electrical Insulation

These high-performance glass fibre rectangular bars are engineered from a robust polyester matrix reinforced with continuous glass fibres, delivering outstanding strength and dimensional stability in a compact, easy-to-handle profile. Designed for demanding environments, they provide an excellent balance of mechanical performance, electrical insulation and long-term durability.

Available in a wide choice of cross-sectional sizes and lengths, these bars are ideal for use in electrical, mechanical and structural applications where weight saving, corrosion resistance and insulation are critical. From busbar supports and transformer components to precision spacers and machine frameworks, they offer a dependable alternative to metal and traditional insulating materials.

Product Features

• Glass fibre rectangular profile with a tough polyester resin matrix for enhanced mechanical strength.
• Offered in a range of cross-sectional sizes, including 12 x 8 mm, 15 x 3.35 mm, 20 x 10 mm, 24 x 2.5 mm, 25 x 4.76 mm and several additional dimensions to suit different design requirements.
• Supplied in standard lengths of 2 x 2500 mm or 5000 mm, allowing both compact and extended installations.
• Excellent electrical insulation properties, making the bars suitable for high-voltage and low-voltage equipment.
• High rigidity and resistance to bending under load, supporting reliable performance in structural and support roles.
• Good resistance to moisture, oils and many chemicals, enabling use in harsh or industrial environments.
• Low weight compared with metal bars of similar strength, aiding easier handling and installation.

Key Features and Benefits

• Superior mechanical strength: Glass fibre reinforcement within the polyester matrix delivers high tensile and flexural strength, reducing the risk of cracking or deformation under load.
• Reliable electrical insulation: Non-conductive construction makes these bars ideal for segregating live components, improving system safety and helping to meet electrical standards.
• Corrosion and moisture resistance: Unlike steel or other metals, the composite will not rust and is far less affected by damp conditions, extending service life with minimal maintenance.
• Lightweight yet robust: Lower mass simplifies handling, transport and installation, while maintaining the stiffness required for structural and support applications.
• Design flexibility: Multiple cross-sectional sizes and lengths provide versatility for custom assemblies, retrofits and new designs without the need for extensive machining.
• Cost-effective performance: Long service life and reduced maintenance demands help lower overall lifecycle costs compared with traditional metallic or purely plastic alternatives.

Specifications

Applications and Ideal Uses

These glass fibre rectangular bars provide a versatile solution for electrical, mechanical and structural applications where strength, insulation and corrosion resistance are essential.

• Insulating supports, spacers and barriers in switchgear, control panels and transformer assemblies.
• Structural members, frames and stiffeners in machinery, enclosures and equipment housings.
• Non-conductive mounting rails and brackets in electrical and electronic installations.
• Corrosion-resistant components in chemical processing, marine and outdoor environments.
• Prototype and custom-engineered parts where a strong, lightweight and insulating material is required.

Frequently Asked Questions

Can these glass fibre rectangular bars be machined or drilled?

Yes. The bars can be cut, drilled and machined using appropriate tooling for composites. It is recommended to use sharp carbide tools, adequate clamping and dust extraction, and to follow standard safety practices when working with glass fibre materials.

Are these bars suitable for outdoor or damp environments?

They are well suited to outdoor and damp conditions thanks to their corrosion-resistant polyester matrix and glass fibre reinforcement. The material is resistant to moisture and will not rust, making it appropriate for many external or high-humidity applications.

How do I choose the right size and length for my application?

Select the cross-sectional size based on the required mechanical strength, stiffness and available space in your assembly. The length should match or slightly exceed the span you need, allowing for any cutting or finishing. Where spans are longer or loads are higher, choose a larger cross-section or shorter unsupported spans to maintain adequate rigidity.