Name: GRP XPS Sandwich Panel
Brand: RaxPanel

GRP XPS Sandwich Panel

The GRP XPS Sandwich Panel combines Glass Fiber Reinforced Plastic (GRP) skins with an Extruded Polystyrene (XPS) foam core in a sandwich configuration, delivering thermal insulation and structural integrity for building and cladding applications. GRP skins range from 0.7 to 5.0 millimeters thick, with optional Continuous Fiber Reinforced Thermoplastic (CFRT) sheets for enhanced impact resistance. The closed-cell XPS core, typically 35 to 50 kilograms per cubic meter in density, provides consistent insulation. Embedded aluminum, timber, or fiberglass profiles augment strength, while gel-coat surface treatments in customizable RAL colors add anti-ultraviolet, flame-retardant, and antistatic properties.

The panel’s low thermal conductivity minimizes heat transfer while maintaining lightweight handling characteristics. Its sandwich construction delivers high strength and compression resistance, with waterproof, moisture-proof, and corrosion-resistant performance. Additional features include weather resistance, impact resistance, and anti-mildew properties, ensuring durability across varied climatic conditions.

Applications include wall, floor, and roof panels in recreational vehicles, motorhomes, and caravans. Transportation uses encompass refrigerated truck bodies and trailer panels for temperature control. Marine installations feature interior partitions on yachts and cruise ships, reducing hull weight and improving fuel efficiency. The panel also serves cold storage facilities, mobile homes, and industrial buildings.

Advanced production capabilities enable CNC (Computer Numerical Control) machining for precision cutting and customization up to 12 meters in length and 3.2 meters in width, with thicknesses between 10 and 120 millimeters. Glass Mat reinforced Thermoplastic (GMT) reinforcement layers enhance surface flatness and impact resistance.

GRP XPS Sandwich Panel Supplier for Superior Cold Chain Performance

As a leading manufacturer, supplier, and exporter of insulated composite panels, RaxPanel is dedicated to providing high-quality and innovative solutions for the transportation and logistics industry. With over 20 years of experience as a direct manufacturer based in Hebei, China, we specialize in custom composite panel solutions, serving clients in more than 30 countries. Our GRP XPS Sandwich Panel is specifically engineered for freezer cargo boxes, delivering superior thermal insulation, exceptional durability, and reliable performance under demanding conditions.

Our in-house R&D and advanced production capabilities allow us to offer fully customized solutions, including:

Excellent thermal insulation properties ideal for cold chain logistics
High strength and impact resistance for long service life
Lightweight construction combined with structural reliability
Custom sizes, thicknesses, and surface treatments

Available in thicknesses from 10–120 mm, widths up to 2.8m, and lengths up to 12m, our panels are produced at our facility with a daily output exceeding 1500 m². Choose RaxPanel’s GRP XPS Sandwich Panel for Freezer Cargo Box and experience the difference in performance and efficiency for your transportation requirements.

Parameter Category	Parameter	Value
General Specifications	Skin Material	Glass Reinforced Plastic (GRP)
	Core Material	Extruded Polystyrene (XPS) Foam
	Standard Thickness	10 mm – 120 mm
	Standard Width	2.8 m
	Standard Length	≤ 12 m
Core Properties	Core Density (Customizable)	Specified per application
	Cell Structure	Closed-cell
Performance Characteristics	Thermal Insulation	Yes
	Moisture Resistance	Yes
	Dimensional Stability	Yes
	Waterproof	Yes
	Impact Resistance	Yes
	Scratch Resistance	Yes
	Lightweight	Yes
Processing & Customization	Machining Compatibility	Standard woodworking tools, CNC
	Surface Finish Options	Customizable

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 XPS Sandwich 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 XPS Sandwich 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 XPS Sandwich 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 XPS Sandwich Panels?

GRP XPS Sandwich 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.