Patents by Inventor Sang-Pil Kim

Sang-Pil Kim 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 release film using silicone aqueous emulsion release liquid
    Patent number: 6737119
    Abstract: A method for producing a release film which is used for the manufacture of adhesive labels, double-sided tapes, etc., is disclosed. The release film provides improved adhesion between a substrate and a release layer, and excellent peel strength between the release layer and an adherent. The method includes the steps of : obtaining a silicone aqueous emulsion release liquid by dispersing a silicone aqueous release agent including a dispersion of a vinyl-modified colloidal silica, a dispersion of a platinum chelate catalyst and a polysiloxane water-dispersible silicone emulsion, in water, so as to achieve a solid content of the release liquid of 2.5˜30% by weight; and applying and drying the obtained release liquid on a substrate to form a release layer.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: May 18, 2004
    Assignees: Toray Saehan Incorporation, Haeun Chemtec Co., Ltd.
    Inventors: Sang Pil Kim, Ki Bong Suh, Moon Bok Lee, Jeong Woo Lee, Kwang Choon Chung, Myung Sun Gong, Chang Soo Kim