Name: GRP Foam Core Panel
Brand: RaxPanel

Fiberglass/GRP Foam Core Panel

Fiberglass/Glass Reinforced Polymer (GRP) foam core panels combine fiberglass reinforced polymer skins with a lightweight foam core in a sandwich construction. The Glass Reinforced Polymer (GRP) skins feature glass fibers embedded in thermosetting resin, while the core uses rigid foam such as polyurethane (PU), extruded polystyrene (XPS), or polyethylene terephthalate (PET). High-performance adhesives bond these layers for structural integrity across environmental conditions.

The panels deliver exceptional thermal insulation through their closed-cell foam cores, which effectively reduce heat transfer. Their lightweight construction achieves high strength-to-weight ratios while maintaining impact resistance and durability. The GRP surface provides scratch resistance and withstands moisture, corrosion, and chemical exposure for extended service life.

Standard specifications include thickness ranges from 10mm to 120mm, with maximum dimensions reaching 12 meters length and 3.2 meters width. Foam core density varies between 28 kg/m³ and 300 kg/m³ depending on performance requirements. Surface treatments include glossy or matte finishes with optional protective films.

Applications span transportation (refrigerated truck bodies, trailer linings), marine construction (boat decks, cabin partitions), building systems (partition walls, curtain walls), and industrial uses (logistics crates, furniture manufacturing). The panels machine easily with standard woodworking tools or Computer Numerical Control (CNC) equipment for precise cutting, drilling, and routing operations.

Trusted Global Supplier: RaxPanel GRP Foam Core Solutions

As a leading manufacturer, supplier, and exporter of polyurethane foam (PU) sandwich panels, RaxPanel leverages 20+ years of expertise to deliver Fiberglass/GRP Foam Core Panels engineered for superior thermal insulation and durability in freezer cargo boxes.

Based in Hebei, China, and serving clients in 30+ countries, our in-house R&D and production capabilities ensure every panel benefits from continuous fiber reinforcement for exceptional toughness and PU foam core properties for optimal temperature retention.

With a daily output of 1500+ m², we provide reliable, custom solutions that meet rigorous industry demands. Our commitment to excellence and advanced technology guarantees sustainable, high-performance materials tailored to your specific needs.

Choose RaxPanel Fiberglass/GRP Foam Core Panels and experience the difference in quality and efficiency.

Parameter	Specification
Panel Material	Fiberglass Reinforced Polymer (FRP) Skin
Core Material	Rigid Foam (e.g., PU, XPS, PET)
Core Density	28 – 300 kg/m³ (Customizable)
Total Thickness	10 – 120 mm
Length	≤ 12 m
Width	≤ 3.2 m
Surface Treatment	Glossy / Matte Finish; Optional Protective Film
UD Tape Layers (Skin)	2 – 9 layers (Customizable)
Temperature Resistance	High Temp: Up to 120°C; Low Temp: -40°C
Weight	Custom, based on thickness and core material
Performance Treatments	Optional: UV-resistant, Anti-static, Flame-retardant
Processing	CNC Machining (Cutting, Drilling, Routing)
Embedded Reinforcement	Optional: Aluminum profiles, Wooden inserts

Related Products

GRP Foam Core Panel

GRP Honeycomb Panel

GRP Plywood Panel

GRP Balsa Sandwich Panel

GRP PET Sandwich Panel

GRP PU Sandwich Panel

GRP PVC Sandwich Panel

GRP XPS Sandwich Panel

GRP Foam Core Panel Selection & Engineering Guide

Glass Reinforced Plastic (GRP / FRP) composite skins bonded to structural foam or honeycomb cores provide superior anti-corrosion barrier protection, high flexural strength, and easy maintenance for marine and transport enclosures.

💡 Pro Tip: Delamination Prevention Under Thermal Cycling
At RaxPanel, we utilize automated vacuum lamination with high-performance two-component polyurethane adhesives to ensure a bond strength that absorbs differential thermal expansion without micro-delamination.

1. How to Choose the Right Skin Alloy and Thickness

Outer skin selection governs mechanical impact resistance, corrosion barriers, and structural stiffness across different operating environments.

2. How Well Does the Core Insulate and Withstand Heavy Loads?

The core material acts as the web in an I-beam structure, handling shear stress and maintaining thermal R-value insulation:

Performance Metric	RaxPanel Engineering Standard	Application Advantage
Skin Spec	GRP / FRP Woven Roving Sheet (0.3mm – 2.0mm / 1.0-3.0mm)	High tensile and impact resistance against road debris
Thermal Conductivity	~ 0.028 – 0.038 W/m·K	Consistent thermal R-value energy savings
Adhesive Layer	Two-component PU / Epoxy Adhesive	Delamination-free performance under thermal freeze-thaw cycles

3. Which Surface Finish Will Protect Your Panels for 20+ Years?

Factory roller coating specifies long-term color stability, UV protection, and resistance against industrial pollutants or marine salt spray.

4. How Fire-Safe and Soundproof Are These Panels?

🛡️ Compliance & Acoustic Isolation:

Fire Safety: Formulations comply with EN 13501-1 Class B-s1,d0 and GB8624 Class B1 building fire safety standards.
Sound Damping: Composite core attenuates noise transmission by 24 dB to 30 dB relative to solid metal sheets.

5. Where Are GRP Foam Core Panels Most Commonly Installed?

🚢 Marine Cabin Bulkheads & Ship Interiors

Salt-spray immune composite bulkheads reducing vessel top-weight.

🚛 Transport Compartments & Chemical Housings

Chemical resistant and high-impact bodywork for aggressive environments.

6. How to Cut, Groove, and Seal Edges During Installation

Panels process easily on-site using standard CNC machinery, routers, or specialized edge profiles for airtight moisture sealing.

Frequently Asked Questions (FAQS)

1. What are the standard panel thicknesses, maximum lengths, and width options available for GRP Foam Core Panels?

Standard panel thicknesses range from 10mm up to 150mm. Standard widths include 1000mm, 1220mm, and 1500mm, with maximum single-sheet lengths up to 5800mm (5.8m) to fit ocean freight container shipping dimensions.

2. What are the primary engineering benefits of using GRP Foam Core Panels?

GRP Foam Core Panels deliver an exceptional stiffness-to-weight ratio, rot-proof moisture resistance, reliable thermal insulation, and dynamic fatigue endurance for high-stress applications.

3. How do these composite panels perform under high humidity and outdoor weathering?

The closed-cell core prevents water logging and condensation absorption, while pre-painted skins provide a 20+ year weatherability barrier against UV degradation.

4. What fire safety ratings and quality certifications do these composite panels meet?

Flame-retardant formulations meet EN 13501-1 Class B-s1,d0 and GB8624 Class B1 fire performance standards. Manufacturing quality is governed under ISO9001 management systems, with raw material performance verified under SGS and CE testing.

5. What surface coating options are available for exterior UV protection?

70% PVDF Fluorocarbon Coating PVDF coating provides a 20+ year exterior weatherability warranty against UV fading and acid rain. FEVE offers high gloss retention, while PE coating is cost-effective for indoor partitions.

6. Can these composite panels be CNC grooved, bent, or edge-sealed on-site?

Yes. Pre-painted skins can be V-grooved at 90° or 135° on the reverse side using standard CNC routers or hand tools, allowing manual edge folding into architectural cassettes without surface paint cracking.

7. How are large panel shipments packaged to prevent freight damage during ocean transit?

Panels are packed with protective PE film on both skins, separated by inter-sheet foam layers, and secured on heavy-duty export wooden pallets or CKD steel crates to prevent shipping damage during 20ft and 40ft container freight.