Patents by Inventor Hisatosi Suzuki

Hisatosi Suzuki 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).

  • Process for producing a porous film
    Patent number: 4921652
    Abstract: A process for producing a porous film having practically sufficient mechanical strengths, good flexibility, uniform fine pores and high moisture vapor permeability, and further an extremely thin porous film, which process comprises blending 30 to 80 parts by weight of an inorganic fine powder having a specific surface area of 15 m.sup.2 /g or less and an average particle size of 0.4 to 4 .mu.m with 20 to 70 parts by weight of a polyolefin resin, followed by melt-molding the resulting blend into a film and then stretching the film to 2 to 7 times the original length at least in the uniaxial direction.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: May 1, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Syoichi Tsuji, Syoichi Ito, Shuji Matsumura, Hisatosi Suzuki, Michiyasu Ito
  • Process for producing porous films involving a stretching step and the resultant film
    Patent number: 4705813
    Abstract: A process for producing porous films which comprises blending 100 parts by weight of a polyolefin resin with 50 to 500 parts by weight of barium sulfate preferably having an average particle diameter of 0.1 to 7 .mu.m, melting the resulting resin composition and forming it into a film, and then stretching the film at least uniaxially by a factor of 1.5 to 7.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: November 10, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Keiko Ito, Michiyasu Ito, Shoichi Tsuji, Hisatosi Suzuki, Shoichi Ito
  • Process for producing porous films involving a stretching step and the resultant product
    Patent number: 4705812
    Abstract: A process for producing porous films which comprises melting a resin composition consisting essentially of (1) 100 parts by weight of a high-pressure-processed low-density polyethylene resin having a melt index of 0.5 to 7 and a density of 0.915 to 0.935, a linear low-density polyethylene resin having a melt index of 0.5 to 8.5 and a density of 0.915 to 0.935, or a mixture thereof and (2) 50 to 500 parts by weight of barium sulfate having an average particle diameter of 0.1 to 7 .mu.m; forming the molten resin composition into a film; and then stretching the film at least uniaxially by a factor of 1.5 to 7. As the linear low-density polyethylene resin, a copolymer of ethylene and hexene and/or octene is particularly preferred.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: November 10, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Keiko Ito, Michiyasu Ito, Shoichi Tsuji, Hisatosi Suzuki
  • Resin compostion for porous film and film prepared therefrom
    Patent number: 4699733
    Abstract: A porous film having a good water vapor permeability is obtained with a high productivity by melting a resin composition comprising 100 parts by weight of a polyolefin resin and 50 to 500 parts by weight of barium sulfate having an electric conductivity of 250 .mu.S/cm or less in terms of the electric conductivity of a supernatant formed when the barium sulfate is added to water, and a particle size of 0.1 to 7 .mu.m, making the melt into a film and stretching the film to 2.5 to 14 times the original area at least in the uniaxial direction.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: October 13, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shuji Matsumura, Michiyasu Ito, Syoichi Tsuji, Hisatosi Suzuki, Syoichi Ito