Kerdyn™ PET
Recycled Structural Foam Core for Wind
The perfect balance of strength, stiffness, and sustainability
Manufactured from up to 100% recycled PET, Kerdyn PET core is ideal for sandwich construction in wind turbine blades, increasing stiffness, reducing weight and enhancing durability. A thermoplastic core with consistent mechanical performance, design versatility and a sustainable product profile, it is the core of choice for next-generation wind blades and nacelle components.
Durable and thermally stable in challenging conditions, recycled Kerdyn PET helps wind turbine OEMs meet ambitious sustainability goals without compromising performance or reliability.
Sustainability at Scale
Gurit’s Kerdyn PET core supports the wind industry’s transition to carbon-neutral production. Made from up to 100% recycled post-consumer PET bottles (guaranteed minimum 50%) , Kerdyn PET offers up to 65% lower CO₂ emissions compared to conventional foam cores. Through a closed-loop recycling system that reuses PET waste from our own operations, Gurit gives new life to everyday plastic waste – recycling nearly 1 billion bottles annually – transforming it into structural materials that power renewable energy.
Key Features of Kerdyn PET
Sustainable
Made from up to 100% recycled PET, annually saving thousands of tons of post-consumer plastic from landfill
High shear and compressive strength
Ideal for structural areas such as shear webs and blade shells
Reliable fatigue resistance
Maintains integrity under long-term cyclical loads
Closed cell structure prevents decay
Through preventing moisture ingress and freeze-thaw damage
Low resin uptake
Lower blade weight and cost – plus a Lite version available for further savings
Excellent machinability
For accurate cutting and shaping by blade manufacturers – or provided by Gurit in kit form
Processing and Compliance
- Can be used with epoxy, polyester, and vinyl ester resin systems.
- Compatible with all major blade manufacturing methods: vacuum infusion and RTM, prepreg, wet lamination, and thermoforming.
- A smooth surface finish is optimized for bonding and skin lamination.
- Surface finishing options to provide more flexibility in shaping and improve processing performance are available upon request: pinholes, cuts, grooving or scrimmed.
- Available in sheet or optimized kits, with standard finishing options for maximum flexibility in production.
- DNV certified.
Availability Densities and typical range
Gurit provides worldwide availability and technical support to meet the needs of wind blade manufacturers everywhere.
Kerdyn PET is available as an optimized core kit, using Gurit’s proprietary Opticore platform.
Density
Nominal Density
Half Sheet Size
Nominal Sheet Size
Thickness Range
80
80 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 200 mm
100
100 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 200 mm
115
115 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 175 mm
135
135 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 150 mm
150
150 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 135 mm
200
200 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 100 mm
235
235 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 200 mm
250
250 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 80 mm
300
300 kg/m3
1005/1220 x 1220 mm
1005/1220 x 2440 mm
5 – 80 mm
Typical Applications
Shear webs
Shell cores
Blade root inserts
Nacelle and spinner covers
Access panels and internal reinforcements
Powering Renewable Performance
Lightweight, reliable and sustainable, Kerdyn PET helps the wind energy industry build longer-lasting, higher-performing blades with a lower environmental footprint. Partner with Gurit to drive innovation, circularity and efficiency in the wind turbine industry.
Downloads
Product Brochures
Processing Guides
Gurit Standard Finishes
Get in touch with us to learn more about Gurit and how our solutions can work for you.
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