GRP PU Sandwich Panels Manufacturer | High-Strength & Insulation

GRP PU Sandwich Panel

The GRP PU Sandwich Panel combines glass fiber reinforced plastic (GRP) skins with a rigid polyurethane foam core, bonded using polyester or polyurethane resin adhesives. The GRP skins range from 0.7 to 5.0 mm thick with gel coatings available in matte, glossy, or embossed finishes and RAL colors. The closed-cell polyurethane core provides densities from 28 to 50 kg/m³, delivering thermal conductivity between 0.018 and 0.024 W/(m·K).

The panel operates across temperatures from -40°C to 120°C while resisting moisture, chemicals, and UV radiation. The closed-cell structure minimizes water absorption and maintains structural stability under mechanical stress. With core densities as low as 32 kg/m³, the lightweight design facilitates handling and installation while providing high stiffness and impact resistance. Service life typically exceeds 25 years with minimal maintenance requirements.

Applications include construction walls, roofs, and partitions; refrigerated transportation vehicles and trailers; cold storage facilities; modular buildings; and marine environments. CNC machining enables precise fabrication for complex designs and embedded components like aluminum profiles. Panels are manufactured up to 12 meters long and 3.2 meters wide using vacuum composite processes.

Customization options include thicknesses from 10mm to 200mm, various dimensions, surface finishes, colors, and reinforcement materials tailored to specific performance requirements.

Your Trusted GRP PU Sandwich Panel Supplier

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 operate as a direct manufacturer based in Hebei, China, specializing in custom composite panel solutions. Our in-house R&D, design, and production capabilities allow us to deliver GRP PU Sandwich Panels that replace traditional panels with lighter, more durable, better thermal insulating, and more cost-effective performance.

The GRP PU Sandwich Panel combines a glass reinforced plastic (GRP) skin with a polyurethane foam core, compounded using high-performance adhesive for superior bonding strength. This structure results in:

Excellent thermal insulation
Reduced weight
Enhanced durability

These qualities make our panels ideal for refrigerated trucks, cold storage, and logistics applications. With a daily output of 1500+ m² and service to clients in 30+ countries, we ensure reliable, high-quality products tailored to specific requirements. Choose our GRP PU Sandwich Panel and experience the difference in performance and efficiency for your transportation needs.

Parameter	Value
Material Properties
Skin Material	Gelcoat GRP (Glass Fiber Reinforced Plastic) sheet
Skin Thickness	0.7 to 5.0 mm
Core Material	Rigid polyurethane foam (closed-cell structure)
Core Density	28 to 50 kg/m³
Adhesive	Unsaturated polyester or polyurethane resin
Surface Finish
Surface Treatment	Matte, glossy, or embossed
Surface Color	RAL series
Dimensions
Length	≤ 12 m
Width	≤ 3.2 m
Thickness	10 to 200 mm
Thermal Properties
Thermal Conductivity	0.018 to 0.024 W/(m·K)
Working Temperature	-40°C to 120°C
Mechanical Properties
Barcol Hardness	≥ 40
Flat Compressive Strength	≥ 0.18 MPa
Edgewise Compressive Strength	≥ 2.0 MPa
Tensile Strength	≥ 0.85 MPa
Additional Features
Internal Reinforcement Materials	Aluminum profiles, steel profiles, wood, fiberglass profiles, etc.

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Frequently Asked Questions (FAQS)

What are the key advantages of GRP PU Sandwich Panels?

GRP PU Sandwich Panels offer excellent thermal insulation with conductivity as low as 0.018 W/(m.K), are lightweight yet strong with PU foam core density of 28–50 kg/m³, provide superior weather and corrosion resistance, enable easy installation, and deliver a service life of up to 25 years. Their closed-cell polyurethane structure ensures optimal temperature control across various environments.

What are the common applications for GRP PU Sandwich Panels?

These panels are widely used in refrigerated trucks, cold storage rooms, construction walls and roofs, recreational vehicles (RVs), trailers, modular buildings, industrial insulation facilities, partitions, clean rooms, and transportation vehicles due to their superior insulation and structural properties.

What materials are used in the construction of GRP PU Sandwich Panels?

The panels consist of FRP (Fiber Reinforced Plastic) skins with gel coating for durability and aesthetics, and a polyurethane foam core with closed-cell structure for insulation. High-quality adhesives like unsaturated polyester or polyurethane glue bond the layers securely.

What sizes and customization options are available?

Standard thickness ranges from 10 mm to 150 mm (common: 15, 20, 25, 30, 50 mm), length up to 12 meters, and width up to 3.2 meters. We offer custom thicknesses, dimensions, colors (RAL series), surface finishes (matte, glossy, embossed), core materials, shapes, and embedded reinforcements tailored to your project requirements.

How user-friendly is installation and what maintenance is required?

Panels are designed for rapid installation using extrusions or adhesives, with lightweight construction simplifying handling and reducing labor costs. Maintenance is minimal, featuring self-cleaning surfaces or easy cleaning with water and mild detergents.

What are your terms for bulk orders, including pricing and delivery?

We provide competitive pricing starting from $5 per square meter for bulk orders, with delivery lead times of 1 to 15 days. We deliver internationally to over 30 countries, ensuring reliable logistics and efficient supply chain management for wholesale partners.

Do you provide technical documentation for engineering specifications?

Yes, we provide detailed technical data sheets, performance test reports conducted according to ASTM standards, and CAD models to support your design needs. Our products meet international standards like ISO9001:2015, ensuring reliable performance and compliance.