Patents Assigned to Tae S. Hwang
  • Patent number: 5000822
    Abstract: An imitation leather product and a process for the preparation of the imitation leather product from natural hemp which comprises the steps of (a) firstly digesting natural hemp fiber with weak alkali solution, (b) secondly digesting with ammonia gas, (c) presoak treating either with methylol urea and ammonium phosphate, or sodium chromate and sulfuric acid, and immediately adding ammonia thereto, respectively, (d) beating with SBR resin and cyclohexylcarboxyl diphenylamino thiazolyl sulfonamide, (e) jetting through a multiple stage fiber jetting device, and soaking in a soaking bath container containing methylphenol and SBR resin.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: March 19, 1991
    Assignees: Tae S. Hwang, Young K. Hong
    Inventors: Tae S. Hwang, Kyung H. Kim