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What is the recycling of glass fiber reinforced polymer composites? 

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The recycling of glass fiber reinforced polymer composites involves finding ways to reuse and repurpose these materials to reduce waste. One approach is to melt the entire glass-fiber-reinforced component without size reduction, resulting in a fiber-reinforced melt that can be pressed through a nozzle to create a strand with highly oriented fibers. This strand can then be used in the production of new components through a tape-like laying process . Another method is thermal recycling, which involves subjecting the composites to different temperatures and times to reinsert the recycled fibers into a new life cycle. By testing various laminates manufactured with recycled glass fibers, it was found that recycling at 600 °C for 15 minutes resulted in a minimal loss of tensile strength, while recycling at 400 °C for 180 minutes yielded the best solution in terms of tensile and flexural strength reduction . Additionally, solvolysis in ethanol under supercritical conditions has been explored as a means of recycling fiberglass with an epoxy matrix, with promising results in terms of complete matrix removal and high residual strength of the recovered fibers .

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The paper discusses the recycling of glass fiber reinforced polymer (GFRP) waste through mechanical recycling, which has been used at an industrial scale by GFRP manufacturers.
The provided paper discusses the feasibility of recycling fiberglass with an epoxy matrix by solvolysis in ethanol under supercritical conditions. It does not specifically mention the recycling of glass fiber reinforced polymer composites.
The paper discusses the thermal recycling of glass fibre composites, which involves extracting the glass fibre from the composite material and reusing it in new laminates.
The paper presents a recycling concept for glass fiber-reinforced plastics, where the whole component is melted without size reduction. The resulting fiber-reinforced melt is pressed through a nozzle to achieve highly oriented fibers for reuse in new components.

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