GB/T 39690.1-2020 specifies the nomenclature system and classification basis for recycled mixtures of polypropylene (PP) (PP) and polyethylene (PE) (PE) derived from flexible and rigid consumer products Encasement. Recycled mixtures of flexible or rigid PP and PE in consumer Encasement suitable for molding and extrusion, excluding dangerous goods such as transportation Encasement recyclables, recycled and new Resin mixtures and mixtures containing special types of PE or PP. It is classified by performance levels such as composition, melt mass flow rate, density, Color, etc., providing an important basis for related industries in terms of recycling, specification identification, etc.