Method for coating gas permeable porous body with resin

  • Inventors: TAKAGI NORIO
  • Assignees: Teijin Ltd
  • Publication Date: November 22, 1991
  • Publication Number: JP-H03262571-A

Abstract

PURPOSE: To form a resin film enhanced in bond strength by bringing a part of the surface of a gas permeable porous body into contact with a fluid having a powdery resin dispersed therein to accumulate the powdery resin on the contact surface with the fluid by pressure difference and heating the accumulated film layer to fix the same to the porous body. CONSTITUTION: A part of the surface of a gas permeable porous body is brought into contact with a fluid having a powdery resin (e.g. fluoroplastics) dispersed therein to generate pressure difference between the contact surface with the fluid of the porous body and the other surface thereof. The medium constituting the fluid is allowed to flow from the contact surface with the fluid of the porous body to the other surface thereof by this pressure difference to accumulate the powdery resin on the contact surface with the fluid and the surface layer part thereof. If necessary, drying treatment is applied to the gas permeable porous body to heat the formed accumulated film layer along with the gas permeable porous body and the accumulated film layer is sintered to be fixed to the porous body. By this omitted process, the resin film enhanced in bond strength can be formed to a part of the surface of the air permeable porous body. Further, the thickness of the resin film and the flow resistance of the porous body can be altered to a large extent by the simple alteration of a condition. COPYRIGHT: (C)1991,JPO&Japio

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