QB/T 5078-2017 "Technical Conditions for Special Processing Aids for Unplasticized Polyvinyl chloride (PVC) (PVC-U) Profiles" specifies the requirements for processing aids based on acrylates (ACR) in the processing of unplasticized polyvinyl chloride (PVC) (PVC-U) profiles. This standard includes technical requirements, test methods, signs, Encasement, transportation and storage of processing aids. Processing aids must meet the requirements listed in the standard to ensure their Stability and effect in the processing of PVC-U profiles. It is suitable for enterprises and units that produce and use unplasticized polyvinyl chloride (PVC) profiles, helping to ensure that the mass and performance of products meet the expected standards, while meeting the requirements of relevant regulations.