Membrane laminate

  • US 10,328,393 B2
  • Filed: 05/15/2008
  • Issued: 06/25/2019
  • Est. Priority Date: 05/17/2007
  • Status: Active Grant
First Claim
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1. An ultrafiltration device, comprising:

  • a plurality of porous ultrafiltration membranes, wherein the plurality of porous ultrafiltration membranes is made of a polymeric material selected from the group consisting of polysulfone, polyethersulfone, blends thereof and/or copolymers thereof;

    a first support plate and a second support plate, each of the first support plate and the second support plate formed of polyvinylidene fluoride, the first and second support plates each having a first surface facing each other and a second surface opposite the first surface of each support plate;

    wherein the plurality of porous ultrafiltration membranes are heat bonded to the first surface of said first support plate along a sealing line such that molten polyvinylidene fluoride infiltrates into pores of the porous ultrafiltration membranes and, optionally, wherein at least one second support plate comprises a porous ultrafiltration membrane;

    a thermal bond between the first support plate and the second support plate, wherein the thermal bond forms a liquid tight seal outside the sealing line on each first support plate, wherein the number of porous ultrafiltration membranes is in a number equal to the number of the first support plates; and

    at least one port, the at least one port formed from the first surface to the second surface of each the first support plate and the second support plate.

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