What is the difference between new material and recycled material?

Identification by combustion method; softening or melting temperature range: 75~90°C； Combustion behavior: Difficult to soften ； Flame combustion state: yellow on top, green below, with smoke ； Condition after removing from fire: The fire has been extinguished ； Odor: pungent acidic smell. Identification by solvent treatment; solvents: **furan**, **, methanol, dimethylformamide ； Non-solvents: methanol, propanone, heptane. 2) It can be regenerated and granulated. 3) The recycling process of PVC mainly includes the following 6 steps: (1) Pretreatment of PVC waste ； (2) Selective dissolution in a mixed solvent ； (3) Separate insoluble substances ； (4) Precipitation of recycled PVC ； (5) Drying treatment ； (6) Recovery and recycling of solvents: For example, in the case of recycled hard polyvinyl chloride UPVC, up to 20% of it can be mixed with new material; the amount of recycled material used depends on the final purpose of the product. The misuse of recycled materials can lead to failed injection molding; not only is there an excessive amount of recycled content, but another reason is that the material has been reprocessed multiple times. The more times recycled material is reused, the greater the decline in its quality.