Patents by Inventor Yujun SU

Yujun SU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • POLYAMIDE RECYCLING PROCESS AND POLYAMIDE OBTAINED BY RECYCLING PROCESS
    Publication number: 20230250252
    Abstract: A recycling process for a polyamide waste material includes the following steps: adding a polyamide waste material into a mixed solvent to obtain a solution, heating the solution to 50° C. to a reflux temperature of the solution, conducting stirring for dissolution, and then conducting decolorization treatment and filtration to obtain a polyamide solution; and adding the polyamide solution into water, precipitating polyamide as a solid in deionized water, and conducting separation to obtain recycled polyamide. The mixed solvent includes, in parts by weight, 10-30 parts of phenol and 15-40 parts of toluene.
    Type: Application
    Filed: December 29, 2020
    Publication date: August 10, 2023
    Applicant: KINGFA SCI. & TECH. CO., LTD.
    Inventors: Huan CHANG, Nanbiao YE, Cheng LI, Wohua ZHOU, Xinxin LIU, Xiumei ZHU, Yujun SU, Lei TANG, Xianbo HUANG