The process involves the shredding of waste textile materials, followed by the removal of impurities and metals, then subjecting the cleaned material to heating and melting. The melted material is then viscosity increased in a viscosity increaser. Following this process, the material is pelletized through screening to form polyester chips. During production, waste materials are first shredded, then melted and mixed via electric heating. The melt then undergoes viscosity increase through the use of an homogenizing reactor, which makes the melted and viscous material more uniform while increasing its viscosity. After filtration, the homogenized and more viscous melt can be cooled and solidified, then pelletized and screened. The process equipment primarily operates using electricity, and the solid waste output mainly includes scrap metal, waste packaging, discarded filters, waste activated carbon, etc. Emissions include exhaust gases with VOCs, COD, SS, NH3-N, and hazardous wastes such as waste oil and waste engine oil are disposed of by third-party companies. This dataset applies to the process of preparing再生切片from waste synthetic fibers.