GRP PET Sandwich Panels Manufacturer - Fiberglass Composite Panels

GRP PET Sandwich Panel

The GRP PET Sandwich Panel is consisted of fiberglass reinforced plastic (GRP) skins bonded to a polyethylene terephthalate (PET) foam core. This structure combines the high strength and durability of the GRP surface layers with the lightweight and insulating properties of the rigid PET foam core. The panels are manufactured using high-pressure processes to ensure a stable and permanent bond between the layers.

These panels are utilized in applications requiring a combination of thermal insulation, structural integrity, and resistance to environmental factors. Common uses include wall and roof systems in construction, interior and exterior panels for recreational vehicles (RVs), commercial trailers, and marine applications. The material can be processed using standard woodworking tools and CNC machining for custom shapes and sizes, with a typical maximum panel length of 12 meters and width of 3.2 meters.

Key Characteristics:

High strength-to-weight ratio due to the composite sandwich structure
Effective thermal insulation with low thermal conductivity
Resistance to moisture, corrosion, and a wide range of chemicals
Long service life with stability across a temperature range from -50°C to +80°C
Customizable dimensions, surface finishes, and colors
Ease of installation and processing with standard tools

Your Trusted Supplier for High-Performance GRP PET Sandwich Panels

RaxPanel is a professional high-end fiberglass sandwich panel manufacturer in China, specializing in custom composite panel solutions. With over 20 years of experience since our founding in 2002, we have built a strong reputation for innovation and quality, serving clients across more than 30 countries. Our in-house R&D, design, and production capabilities ensure that every GRP PET Sandwich Panel we produce meets the highest standards of performance and reliability.

Our GRP PET Sandwich Panel combines a fiberglass reinforced plastic skin with a PET foam core, creating a lightweight yet durable composite material ideal for applications such as refrigerated truck bodies, cold rooms, wall partitions, and container houses. The sandwich structure offers:

Excellent thermal insulation, reducing energy loss and maintaining stable temperatures
High strength and impact resistance, thanks to the composite design and quality materials
Waterproof and corrosion-resistant properties, ensuring long service life even in demanding environments
Lightweight composition, which helps reduce overall weight and improve fuel efficiency in mobile applications

Produced at our Hebei-based facility with a daily output of over 1500 m², our panels are manufactured using advanced processes and high-quality raw materials. We offer customized solutions in terms of size, thickness, surface finish, and performance treatments to meet specific project requirements.

To learn more about product applications, please consult us. We provide reliable customized solutions for your project.

Parameter Category	Parameter	Value
General Specifications	Core Material	Polyethylene Terephthalate (PET) Foam
	Skin Material	Fiberglass Reinforced Plastic (GRP)
	Maximum Length	12 m
	Maximum Width	3.2 m
	Total Thickness Range	10 – 120 mm
Core Material	Core Density Range	50 – 300 kg/m³
	Thermal Conductivity	0.02 – 0.038 W/m·K
	Closed Cell Rate	≥ 99%
	Water Absorption	≤ 1%
	Operating Temperature	-50°C to +80°C
Skin Material	Surface Treatment	Gel-coat (RAL colors)
Mechanical Properties	Flexural Strength	36.966 MPa
	Compressive Strength	0.1 – 1 MPa
Thermal Properties	Service Life	Up to 50 years

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Frequently Asked Questions (FAQS)

What is a GRP PET sandwich panel?

A GRP PET sandwich panel is a composite material with a PET foam core between GRP (Glass Fiber Reinforced Plastic) skins. It combines lightweight construction with high strength, corrosion resistance, and thermal insulation properties.

What are the main benefits and applications of GRP PET sandwich panels?

These panels offer lightweight yet high-strength construction that resists impact, pressure, corrosion, water, and chemicals. They provide thermal and electrical insulation with excellent weather resistance including UV protection. The recyclable PET foam core supports environmental sustainability. Common applications include vehicle components (dry freight trucks, RVs, buses, ships) for walls, floors, and partitions; building materials for mobile structures, roofing, and insulation; and furniture or industrial uses requiring durable, lightweight materials.

What are the thermal insulation capabilities and standard specifications?

PET foam provides thermal conductivity of 0.03-0.04 W/m-K, achieving an R-value of approximately 0.7-0.9 m²-K/W at 25 mm thickness. Standard panels reach up to 12 meters long and 3.2 meters wide, with customizable thickness from 10-150 mm. Core density ranges from 50-300 kg/m³. Skin options include GRP, CFRT, aluminum, steel, or plywood, with optional anti-UV, flame retardant, and antistatic treatments.

What customization and processing options are available?

RaxPanel provides extensive customization including CNC machining for cutting, drilling, and milling; embedded reinforcements using steel, FRP, or aluminum profiles; and custom specifications for dimensions, skin materials, colors, thicknesses, and core density. Panels can be processed with common tools on-site, and our CNC services minimize additional field work.

Do you provide technical documentation and samples?

Yes, we supply comprehensive technical data sheets with dimensions, material properties, and performance metrics. Samples are available upon request to support your design specifications.

How do you handle large-scale production and international shipping?

Our daily production capacity exceeds 1500 square meters, enabling us to fulfill high-volume orders and meet tight deadlines. We provide customized packaging and logistics solutions with last-mile service, tailored to your loading equipment for secure global delivery.