Name: GRP PVC Sandwich Panel
Brand: RaxPanel

GRP PVC Sandwich Panel

GRP PVC sandwich panels combine glass fiber reinforced plastic (GRP) skins bonded to a polyvinyl chloride (PVC) foam core, delivering high strength-to-weight ratio with thermal insulation. The closed-cell PVC foam core provides low thermal conductivity while the GRP skins contribute structural rigidity. These panels offer waterproof performance, corrosion resistance to acids and alkalis, and flame retardant capabilities, making them suitable for moisture-exposed and chemically aggressive environments. Operating temperature ranges from -40°C to +80°C, with anti-ultraviolet additives ensuring color stability and reducing yellowing over time.

The GRP skins utilize either thermosetting resins (unsaturated polyester or epoxy) or thermoplastic variants such as continuous fiber reinforced thermoplastic (CFRT) sheets. PVC foam cores range from 40 to 250 kg/m³ density, adjustable for compressive strength and insulation requirements. Polyurethane or polyester adhesives bond the layers, preventing delamination under stress. Quality control ensures smooth, flat surfaces free from defects, with tight core-to-skin bonding that resists edge warping.

Standard dimensions reach up to 12 meters in length and 3.2 meters in width, with thickness customizable from 10 mm to 150 mm. Weight typically ranges from 7.0 to 8.6 kg/m² depending on configuration. CNC machining enables precise cutting, drilling, and shaping for complex designs, while standard composite tools facilitate efficient fabrication and assembly.

GRP PVC Sandwich Panel Supplier for Superior Thermal Efficiency

RaxPanel is a technology company integrating new materials and innovative solutions, based in Hebei, China. Since our founding in 2002, we have over 20 years of experience as a direct manufacturer specializing in custom composite panel solutions.

Our GRP PVC Sandwich Panels exemplify our commitment to quality and innovation, featuring a sandwich structure that bonds PVC sheets with foam insulation to deliver outstanding thermal insulation, sound absorption, and fire resistance. This advanced design ensures energy efficiency by maintaining stable indoor temperatures, leading to significant reductions in heating and cooling costs while enhancing comfort.

With in-house R&D, design, and production capabilities, we uphold strict quality control and achieve a daily output of over 1500 square meters. Our panels are customizable in sizes, thicknesses, and colors to meet diverse project needs.

We serve a global market, with clients in over 30 countries, providing reliable manufacturing and supply services exclusively. Please contact us to get more information and find the perfect solution for your project.

Parameter Category	Parameter	Value
General Specifications	Skin Material	Glass Reinforced Plastic (GRP)
	Core Material	Closed-cell Polyvinyl Chloride (PVC) Foam
	Adhesive	High-strength, heat and low-temperature resistant
Dimensions	Thickness	10 – 120 mm
	Width	≤ 2.8 m
	Length	≤ 12 m
Core Properties	Core Density	Customizable (Typical range: 40-70 kg/m³)
	Water Absorption	None (Closed-cell structure)
Performance	Thermal Insulation	Excellent (Low thermal conductivity)
	Impact Resistance	High
	Scratch Resistance	High (Protective film available)
	Corrosion Resistance	Excellent
	Waterproof	Yes
Surface & Finish	Surface Treatment	Matte / Glossy; Protective film (e.g., PET, PP)
	Color Options	Customizable
Processing & Customization	Machinability	Standard woodworking and CNC tools
	Embedded Reinforcements	Wood, aluminum profiles (optional)
	Recyclability	Yes

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 PVC 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 PVC 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 PVC 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 PVC Sandwich Panels?

GRP PVC 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.