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Porous filter structure and process for the manufacture thereof

  • US 5,928,588 A
  • Filed: 11/13/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 09/10/1996
  • Status: Expired due to Term
First Claim
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1. A process for the manufacture of porous structures comprising:

  • forming a dry mixture comprising a component providing primary separation capability, a component providing green strength reinforcement capability and, a component providing binding capability and selected from the group consisting of thermoplastic and thermosetting polymers;

    delivering said mixture to a suitable surface and building a desired thickness thereof;

    densifying said mixture into the form desired for said porous structure;

    removing said densified porous structure from said surface;

    binding said component providing said primary separation capability by heating said densified porous structure to a temperature of up to about 20°

    C. higher than the melting point of any said thermoplastic component providing binding capability.

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