Structural PET Foam Core Material | Marine, Transport & Construction

PET Foam Core

PET (polyethylene terephthalate) Foam Core combines a closed-cell, thermoplastic structure with exceptional mechanical performance and environmental sustainability. Manufactured from 100% recyclable materials including post-consumer and post-industrial recycled PET (polyethylene terephthalate), this core material reduces carbon footprint while delivering reliable structural properties for composite sandwich applications.

The closed-cell architecture provides high compressive, tensile, and shear strength with excellent fatigue and impact resistance. Low resin uptake and minimal water absorption enhance cost efficiency and long-term durability. The material maintains dimensional stability across processing conditions while distributing loads effectively within sandwich structures.

Thermal stability extends to processing temperatures of 150°C-180°C, with select grades withstanding short-term exposure up to 220°C without outgassing or expansion. Fire-retardant formulations offer self-extinguishing, halogen-free characteristics meeting rigorous safety standards. Chemical resistance includes UV protection preventing degradation and moisture resistance ensuring long-term stability.

Available in densities from 65-320 kg/m³ with thicknesses ranging 3-200mm, PET Foam Core supports diverse applications across wind energy, marine, transportation, and construction sectors. Compatible with resin infusion, Resin Transfer Molding (RTM), Vacuum-Assisted Resin Transfer Molding (VARTM), prepreg curing, and compression molding processes, the thermoformable material machines easily and provides excellent screw retention for efficient assembly.

Trusted Leader in PET Foam Core

Since 2006, RaxPanel has been a pioneer in successfully qualifying PET foam as a core material for the composite industry, with a global reach serving clients in 30+ countries. As a direct manufacturer based in Hebei, China, we leverage 20+ years of experience to produce high-quality PET Foam Core through advanced in-house R&D and production capabilities. Our commitment to innovation has revolutionized industries by offering a material that combines exceptional mechanical properties, high temperature resistance, and full recyclability.

At the heart of our production is a strong environmental focus, utilizing recycled PET from nearly 3 billion plastic bottles to support circular economy practices. This dedication is underscored by certifications such as CE and EPD, affirming both performance excellence and sustainability. With a daily output of 1500+ m², we deliver reliable, high-volume solutions for applications ranging from transportation to renewable energy. Our specialists are always available to establish contact with you.

Data Sheet
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Parameter Category	Parameter	Value	Unit
General Properties	Material Type	Polyethylene Terephthalate (PET)	–
	Cell Structure	Closed-cell	–
	Recyclability	100% Recyclable (from post-consumer/post-industrial sources)	–
	Color	Green / Off-White	–
Physical Dimensions	Density Range	65 – 320	kg/m³
	Width (Standard)	Up to 1008	mm
	Width (Max)	Up to 3200	mm
	Length (Standard)	Up to 2448	mm
	Length (Max)	Up to 12000	mm
	Thickness Range	3 – 200	mm
Mechanical Properties	Compressive Strength	0.85 – 5.20	MPa
	Compressive Modulus	73 – 235	MPa
	Tensile Strength	1.40 – 4.00	MPa
	Tensile Modulus	90 – 275	MPa
	Shear Strength	0.55 – 2.05	MPa
	Shear Modulus	13.5 – 70.0	MPa
	Peel Strength (Climbing Drum)	20	N·m/m
Thermal Properties	Max Processing Temperature	150 – 180	°C
	Short-term Temp Resistance (some grades)	Up to 220	°C
	Long-term Service Temperature	~100	°C
	Thermal Stability	No outgassing or expansion	–
Fire Performance	Fire Retardancy (FR grade)	Self-extinguishing, Halogen-free	–
	Toxicity	No toxic gases generated	–
	Certification Potential	HL3 (with phenolic/aluminum skins)	–
Environmental & Chemical	Water Absorption	Minimal / Very Low	–
	Chemical Resistance	Excellent	–
	UV Resistance	Excellent	–
Processing Compatibility	Resin Infusion	Yes	–
	Resin Transfer Molding (RTM)	Yes	–
	Vacuum-Assisted RTM (VARTM)	Yes	–
	Prepreg Curing	Yes (up to 150°C)	–
	Compression Molding	Yes	–
	Contact Molding	Yes	–
	Thermoformability	Yes	–

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Frequently Asked Questions

What is PET foam core and what are its main advantages?

PET foam core is a structural thermoplastic core material used in sandwich applications to increase performance and reduce weight. Its main advantages include high mechanical properties, cost efficiency, ease of use, excellent dimensional stability, recyclability, high temperature resistance, thermoformability, and compatibility with most resin systems. It is also made from recycled materials, contributing to environmental sustainability.

Is PET foam core recyclable and environmentally friendly?

Yes, PET foam core is 100% recyclable and often made from recycled plastic bottles. It supports a circular economy by reducing carbon footprint and greenhouse gas emissions. The material does not use ozone-depleting blowing agents and can be reused or recycled at the end of its life cycle.

What applications is PET foam core suitable for?

PET foam core is used in a wide range of applications including industrial, transportation, marine, wind energy, construction, automotive, and furniture. It is ideal for composite sandwich panels, wind turbine blades, vehicle bodies, ship components, building panels, and partitions due to its lightweight and high-strength properties.

How does PET foam core perform under high temperatures?

PET foam core can handle processing temperatures up to 150°C (302°F) and remains thermally stable with no outgassing or expansion. It offers good dimensional stability at elevated temperatures and is suitable for processes like prepreg, resin infusion, and compression molding.

What are the fire safety properties of PET foam core?

PET foam core generates no toxic gases when burned. For enhanced fire safety, fire-retardant versions are available that offer self-extinguishing properties and can achieve certifications like HL3 when combined with specific skin materials such as phenolic or aluminum.

What manufacturing processes are compatible with PET foam core?

PET foam core is compatible with various manufacturing methods including resin infusion/injection (VARTM/RTM), contact molding (hand/spray), compression molding (GMT, SMC), adhesive bonding, and prepreg processing. It is easy to machine and thermoform.

What are the typical density and size ranges for PET foam core?

PET foam core is available in densities ranging from 65 to 320 kg/m³ (4.1 to 20 lbs/ft³). Standard dimensions include widths up to 1020 mm, lengths up to 2448 mm, and thicknesses from 3 mm to 100 mm, though custom sizes can be produced.

How can PET foam core be customized to meet our specific product design and manufacturing needs?

PET foam can be heated and conformed to specific shapes, offering consistent properties and ease of use for deep customization. It is suitable for various processes like infusion, prepreg, and press bonding, ensuring it fits unique requirements. Technical experts are available to provide support and assistance for all customization questions, helping to innovate and reduce production costs while maintaining quality.

What competitive advantages does your PET foam core offer in terms of cost-effectiveness and supply reliability?

PET foam is cost-effective and provides high mechanical properties, made from recycled materials to reduce costs. It features a homogenous cell structure and is 100% recyclable, contributing to sustainability. With capabilities for high-volume production and reliable supply chain management, it ensures product availability and stability for bulk orders, supported by a global reach to serve diverse markets.

How does PET foam core improve efficiency and durability in construction and installation projects?

PET foam is easy to machine and offers good dimensional stability, making it quick to process and install. It has high strength, impact resistance, and low water absorption, ensuring durability and long-lasting performance in applications like building panels and composites. Its compatibility with various resins and processes, such as resin infusion, allows for efficient project execution, reducing time and cost while meeting safety and quality standards.