This is PMMA Regrind. It can be melted again in furnaces to recover MMA which can be used again to make many new products.
Here is more info on it:
http://www.plasticseurope.org/what-is-plastic/types-of-plastics-11148/engineering-plastics/pmma.aspx
PMMA is 100% recyclable by breaking it down into its constituent parts using a special thermal process or by direct reprocessing. Thermal processing sees PMMA heated to around 400°C to obtain the starting material methylmethacrylate (MMA). The liquid MMA is distilled to over 99 % purity and can then be reused as a starting material in production processes. Direct processing of PLEXIGLAS® comprises the collection of production scrap which is sorted by grade for grinding and dedusting so it can be returned to the extrusion process to produce new sheeting.
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Thank you.
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