How to identify recycled polyester?

Overview of Recycled Polyester (PET)

Waste polyester (PET) polymer and waste polyester (PET) textile materials are recycled and processed into polyethylene terephthalate fiber.

In layman's terms, recycled polyester fiber (hereinafter referred to as recycled polyester) refers to the recycled polyester (such as bottle flakes, foam, waste silk, waste pulp, waste textiles, etc.) made by recycling processes. Ester fiber.

Principle of Identification

Based on the essential difference between the processing process of recycled polyester and virgin polyester, which results in different characteristics, the sample is processed according to the specified conditions and tested on a high performance liquid chromatograph. According to the difference in the relative peak area of the sample under different retention times , To achieve the purpose of qualitative identification.