Liquid purification or separation – Casing divided by membrane into sections having inlet – Coiled membrane
Reexamination Certificate
2011-08-16
2011-08-16
Menon, Krishnan S (Department: 1777)
Liquid purification or separation
Casing divided by membrane into sections having inlet
Coiled membrane
C210S321850, C210S493400
Reexamination Certificate
active
07998348
ABSTRACT:
An object of the present invention is to provide a spiral membrane element that can form a uniform fiber reinforcement layer on an outer circumferential surface by a simple process without a great change in the materials, as well as a process for producing the same. The spiral membrane element of the present invention is a spiral membrane element which is provided with a cylindrical roll R in which a separation membrane, a feed-side flow passageway member, and a permeate-side flow passageway member3are spirally wound in a laminate state around a perforated center tube5and in which a sealing part for preventing mixing of feed-side fluid and permeate-side fluid is disposed, wherein at least one sheet of the permeate-side flow passageway member3has a fiber cloth23aextended or connected to the outer circumferential side, and the fiber cloth23ais wound around an outer circumference of said cylindrical roll R, impregnated with a resin and hardened to thereby form a fiber reinforcement layer.
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Beppu Masashi
Chikura Shinichi
Fujioka Hiroki
Ishii Katsumi
Matsuda Hideki
Knobbe Martens Olson & Bear LLP
Menon Krishnan S
Nitto Denko Corporation
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