At JEC World 2026 Arkema, in collaboration with the Zephir Project and industrial partners, presented a windsurfing speed-board prototype built using Elium® liquid thermoplastic acrylic resin. The prototype integrates recycled carbon fibers and a Rohacryl® core foam supplied by Evonik, with Arkema describing a chemical depolymerization route intended to separate resin and fibers and to regenerate resin feedstock for reuse.
From a materials-science and chemistry perspective, Elium® is described as a liquid thermoplastic resin intended for processing routes typically associated with liquid matrices. Arkema reports that the material’s flow characteristics permit production of high-precision components with geometries relevant to high-performance boards. The company states that mechanical performance is comparable to certain thermosetting composites used in sports applications, while enabling a chemical recycling pathway that, according to the supplier, can recover fibers and convert resin back into reuseable polymer feedstock.
Manufacturing details disclosed in the project narrative emphasize integration of recycled carbon fiber reinforcement and a core foam formulated with the same acrylic chemistry as the matrix. The like-for-like chemistry between core and matrix is described as eliminating a discrete separation step during reclamation; Arkema indicates that post-use depolymerization can separate components for material reconstitution. The program also incorporated advanced modeling and simulation supplied by ALTEN, wind-tunnel and onboard instrumentation, and field testing under high acceleration and hydrodynamic loads by the Zephir team, providing a dataset relevant to fatigue, stiffness, and impact performance assessments.
Practitioners in composites manufacturing and quality assurance may note aspects that could affect specifications and test protocols. Use of recycled fibers and an acrylic foam core may influence interlaminar adhesion, void content, cure kinetics, and NDT strategies. Performance validation under extreme dynamic loading, and retention of properties after one or more recycling cycles, are technical factors that may be relevant when developing material data sheets, acceptance criteria, and long-term durability testing programs.
Several legal and regulatory themes may be implicated by the project as described. Intellectual-property arrangements concerning proprietary resin formulations, processing know‑how, and any jointly developed tooling or simulation outputs may be material to collaboration agreements and licensing structures. Product-liability and risk allocation issues may be implicated by the intended use in high-speed sport environments, where structural failure modes and fatigue life under repeated extreme loading may be focal points in contractual and indemnity provisions. Regulatory compliance matters related to chemical recycling processes, handling and transport of depolymerization intermediates, waste classification, and applicable chemical regulations (for example, regional registration, labeling, or disposal regimes) may be relevant to manufacturers and recyclers participating in the value chain.
For patent counsel, compliance officers, and contract drafters, the Zephir–Arkema partnership and its technical disclosures may present points of practical interest regarding materials specification, traceability of recycled inputs, performance validation, and commercial allocation of IP rights. These topics may be relevant to specification drafting, supplier agreements, and regulatory filings in jurisdictions where chemical recycling and claims of recyclability are subject to regulatory scrutiny.
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