Patents by Inventor Toshio Kotsuka

Toshio Kotsuka 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).

  • Fibrillated weatherproof webs having network structure, nonwoven fabrics made from the webs, and processes for the production of the webs and nonwoven fabrics
    Patent number: 5032442
    Abstract: Disclosed herein is a fibrillated weatherproof web having a network structure, which can be produced with ease and is economical. The web comprises a multilayer composite film composed of at least two layers, one being a first layer (I) made of a first thermoplastic resin and the other a second layer (II) made of a second thermoplastic resin having a melting point lower than the first thermoplastic resin and containing at least 300 ppm of a light resistance imparting agent. A number of slits have been formed in a longitudinal or transverse direction. The web has been oriented at a draw ratio in a range of from 1.1 to 15 times. A nonwoven fabric making use of one or more fibrillated webs of the above sort and processes for the production of the web and nonwoven fabric are also disclosed.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: July 16, 1991
    Assignee: Nippon Petrochemicals Company, Ltd.
    Inventors: Shinji Yamazaki, Toshio Kotsuka