Structural foam materials, based on plastics (PVC, PET, etc.), are rigid foam materials produced by various processes. Though the densities are as low as soft foam materials, they have high strength and rigidity, which makes them used as a core in sandwich composites, thus suitable for many advanced applications that require materials with light weight and high strength. The main applications include wind power generation, rail transportation, yacht, aerospace, energy-efficient buildings and other industries.
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