Patents by Inventor Chung-Chin Feng

Chung-Chin Feng 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).

  • Method for producing ultrafine fiber and artificial leather
    Patent number: 7025915
    Abstract: A method for producing an artificial leather includes mixed spinning an island polymer and a sea polymer having a different dissolving property from that of the island polymer at a predetermined temperature, producing a non-woven substrate from the fiber obtained, immersing the non-woven substrate into a polymer, dissolving and removing the sea polymer in the non-woven substrate to obtain an artificial leather as a semi-finished product, and polishing the surface of the artificial leather to obtain an artificial leather having excellent dyeability and advanced fluff-like property. The ratio of melt flow index of the sea polymer to relative viscosity of the island polymer is about 20 to about 55, in which the relative viscosity of the island polymer is about 2.7 to about 3.5 and the weight percentage of the sea polymer relative to the sum of the sea polymer and the island polymer is about 30% to about 70%.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: April 11, 2006
    Assignee: San Fang Chemical Industry Co., Ltd.
    Inventors: Ching-Tang Wang, Mong-Ching Lin, Chung-Chin Feng, Kuo-Kuang Cheng, Chin-Yi Lin
  • Method for producing ultrafine fiber and artificial leather
    Publication number: 20040045145
    Abstract: A method for producing an artificial leather includes mixed spinning an island polymer and a sea polymer having a different dissolving property from that of the island polymer at a predetermined temperature, producing a non-woven substrate from the fiber obtained, immersing the non-woven substrate into a polymer, dissolving and removing the sea polymer in the non-woven substrate to obtain an artificial leather as a semi-finished product, and polishing the surface of the artificial leather to obtain an artificial leather having excellent dyeability and advanced fluff-like property. The ratio of melt flow index of the sea polymer to relative viscosity of the island polymer is about 20 to about 55, in which the relative viscosity of the island polymer is about 2.7 to about 3.5 and the weight percentage of the sea polymer relative to the sum of the sea polymer and the island polymer is about 30% to about 70%.
    Type: Application
    Filed: March 21, 2003
    Publication date: March 11, 2004
    Inventors: Ching-Tang Wang, Mong-Ching Lin, Chung-Chin Feng, Kuo-Kuang Cheng, Chin-Yi Lin