Name: Panel Sándwich PU GRP
Brand: RaxPanel

Panel Sándwich PU GRP

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.

Parámetro	Valor
Material Properties
Material del revestimiento	Gelcoat GRP (Glass Fiber Reinforced Plastic) sheet
Espesor de Chapa	0.7 to 5.0 mm
Material del Núcleo	Rigid polyurethane foam (closed-cell structure)
Densidad del núcleo	28 to 50 kg/m³
Adhesive	Unsaturated polyester or polyurethane resin
Acabado superficial
Tratamiento de Superficie	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
Propiedades Mecánicas
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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GRP PU Sandwich Panel Selection & Engineering Guide

Las superficies composite de plástico reforzado con fibra de vidrio (GRP / FRP) unidas a núcleos de espuma estructural o colmena proporcionan una superior protección como barrera anticorrosión, alta resistencia a flexión y fácil mantenimiento para recintos marinos y de transporte.

💡 Consejo profesional: Prevención de la delaminación bajo ciclos térmicos
En RaxPanel, utilizamos laminado automático al vacío con adhesivos de poliuretano bicomponente de alto rendimiento para garantizar una resistencia de unión que absorbe la expansión térmica diferencial sin microdelaminación.

1. Cómo elegir el aleación y espesor del revestimiento adecuado

La selección del revestimiento externo determina la resistencia al impacto mecánico, las barreras contra la corrosión y la rigidez estructural en diferentes entornos operativos.

2. ¿Qué tan bien aísla y soporta cargas pesadas el núcleo?

El material del núcleo actúa como el alma de una viga en I, soportando esfuerzos cortantes y manteniendo el aislamiento térmico (valor R):

Métrica de rendimiento	Estándar de ingeniería de RaxPanel	Ventaja de aplicación
Especificación del revestimiento	Hoja de tejido roving de GRP / FRP (0,3 mm – 2,0 mm / 1,0-3,0 mm)	Alta resistencia a la tracción y al impacto contra escombros de la carretera
Thermal Conductivity	~ 0,028 – 0,038 W/m·K	Ahorro de energía con valor térmico R constante
Capa adhesiva	Adhesivo PU / epoxi de dos componentes	Rendimiento libre de delaminación en ciclos térmicos de congelación-descongelación

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 PU Sandwich Panels Most Commonly Installed?

🚢 Mamparos de cabinas marinas e interiores de barcos

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 PU 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 PU Sandwich Panels?

GRP PU 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. ¿Estos paneles compuestos pueden ser canalizados, doblados o sellados en los bordes en sitio con CNC?

Sí. Las pieles pre-pintadas se pueden canalizar en V a 90° o 135° en el lado opuesto usando routers CNC estándar o herramientas manuales, permitiendo el doblado manual de bordes en casetes arquitectónicos sin agrietar la pintura superficial.

7. ¿Cómo se empaquetan los grandes envíos de paneles para prevenir daños durante el tránsito marítimo?

Los paneles se empaquetan con película protectora de PE en ambas pieles, separados por capas de espuma intercaladas, y asegurados sobre palets de madera de exportación de alta resistencia o contenedores de acero CKD para prevenir daños durante el flete en contenedores de 20 pies y 40 pies.