GRP Plywood Sandwich Panels - High-Performance Composite Panels

Fiberglass/GRP Plywood Panel

Fiberglass/Glass Fiber Reinforced Plastic (GRP) plywood panels combine GRP skins laminated onto a plywood core in a sandwich structure. This design leverages fiberglass’s protective qualities and plywood’s structural integrity for industrial and commercial applications requiring durability and performance. The panels deliver high strength-to-weight ratios, moisture and corrosion resistance, and UV stability while remaining cost-effective compared to steel or aluminum alternatives.

The three-layer construction features outer GRP skins (0.7-5.0mm thick) bonded to a plywood core (10-50mm thick) using polyester or polyurethane adhesives. GRP skins consist of glass fibers embedded in thermosetting or thermoplastic resin matrices, often with UV-resistant gel coats in glossy or matte finishes. The plywood core uses cross-laminated wood veneers from birch, pine, poplar, or eucalyptus, providing dimensional stability and rigidity. Mechanical properties include flexural strength up to 37 MPa and compression strength around 13 MPa.

Manufacturing employs vacuum composite techniques with Computer Numerical Control (CNC) processing for precision. Panels can be customized up to 12,000mm long and 3,200mm wide, with variable thickness, wood types, surface finishes, and CNC-machined shapes to accommodate specific design requirements.

Applications include truck and trailer bodies, bus and recreational vehicle construction, marine components, modular buildings, and agricultural structures where weather-resistant, robust materials are essential.

The Global Wholesaler for Durable Fiberglass Plywood Solutions

As a leading manufacturer, supplier, and exporter of polyurethane foam (PU) sandwich panels, RaxPanel is dedicated to providing high-quality and innovative solutions for the transportation and logistics industry. With over 20 years of experience since our founding in 2002, we specialize in custom composite panel solutions, serving clients across 30+ countries from our production base in Hebei, China. Our in-house R&D, design, and production capabilities allow us to deliver tailored Fiberglass/GRP Plywood Panels with precision and reliability, supported by a daily output of 1500+ m².

Our insulated Fiberglass/GRP Plywood Panels are engineered for superior thermal insulation and durability, ideal for freezer cargo boxes. The panels incorporate multiple layers of continuous fiber reinforcement, ensuring:

High toughness
The ability to rebound quickly after bending or impact

This construction, combined with our advanced manufacturing processes, results in a lightweight yet strong material that offers excellent temperature control and long service life. Choose RaxPanel’s Fiberglass/GRP Plywood Panel and experience the difference in performance and efficiency for your transportation requirements.

Parameter	Value	Unit
Skin Material	GRP (Glass Reinforced Plastic)	–
Skin Thickness	0.7 – 5.0	mm
Surface Treatment	UV-resistant gel coat, glossy or matte finish	–
Surface Color	RAL series	–
Core Material	Plywood (birch, pine, poplar, eucalyptus)	–
Core Thickness	10 – 50	mm
Composite Method	Unsaturated polyester or polyurethane adhesive	–
Total Thickness	10 – 50	mm
Length	≤ 12000	mm
Width	≤ 3200	mm
Flexural Strength	37	MPa
Compression Strength	13	MPa

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Frequently Asked Questions (FAQS)

What is a Fiberglass/GRP Plywood Panel?

A Fiberglass/GRP Plywood Panel is a composite sandwich panel made by laminating fiberglass-reinforced plastic (FRP) skins onto a plywood core using adhesives like unsaturated polyester or polyurethane. This structure combines the strength and durability of FRP with the structural integrity of plywood, resulting in a high-performance material resistant to moisture, corrosion, and UV exposure. At RaxPanel, our panels are engineered for reliability in demanding applications.

What are the key advantages of using GRP plywood panels?

GRP plywood panels offer high strength with excellent compression and bending resistance, superior durability through corrosion and UV protection, cost-effectiveness compared to other high-strength materials, and environmental benefits from using renewable plywood. They are lightweight (over 40% lighter than steel or aluminum), waterproof, and easy to maintain, making them ideal for harsh environments and budget-conscious projects. Compared to traditional metals, they do not rust, provide better fuel efficiency in transportation applications, have a longer service life of up to 40 years or more, and are easier to maintain.

In which applications are GRP plywood panels commonly used?

These panels are commonly used in truck and trailer bodies, bus and RV construction, modular buildings, marine applications like boat decks and bulkheads, agricultural structures, and various industrial settings. Their strength, durability, and resistance to elements make them suitable for transportation, construction, and other demanding environments.

What specifications and customization options are available?

RaxPanel's GRP plywood panels are available in total thicknesses from 10mm to 50mm, with lengths up to 12,000mm and widths up to 3,200mm. The FRP skin thickness ranges from 0.7mm to 5.0mm, and the plywood core can be birch, pine, poplar, eucalyptus, oak, or other woods. We provide extensive customization including custom sizes, thicknesses, and shapes through CNC processing services such as cutting, drilling, and embossing. You can select various plywood core materials, FRP skin types, surface treatments like glossy or matte finishes, and colors from the RAL series to meet precise requirements for OEM applications like RV walls, truck bodies, and other components.

Are your panels easy to work with for on-site construction, and do you offer pre-fabrication services?

Yes, our panels are designed for ease of use and can be cut like ordinary plywood, making them suitable for on-site installation in construction projects. We provide CNC machining services for pre-fabrication, including cutting, drilling, and shaping to your specifications. This ensures quick assembly and reduces labor time, supported by panels that are corrosion-resistant, impact-resistant, and weather-resistant for durable performance in various environments.

Do you provide technical data sheets and material samples for architects and engineers?

We offer detailed technical data sheets that include performance parameters such as tensile strength, flexural strength, and compression strength, along with specifications on thickness, weight, and material composition. Material samples are available to help architects and engineers evaluate the product for their projects. These resources ensure compliance with design requirements and facilitate informed decision-making for applications in buildings, vehicles, and other structures.

What is your production capacity and how do you handle large volume orders for distributors?

With over 20 years of experience and a daily output of 1500+ m², we efficiently manage large volume orders. Our manufacturing process utilizes industry-leading composite panel production lines and a one-piece vacuum composite method for high-quality, consistent panels. Delivery times are tailored to order quantity, typically ranging from 7 to 30 days, ensuring reliable supply chain stability for distributors and wholesalers.