Hollow fiber membrane and braided tubular support therefor
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United States of America Patent
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Mar 12, 2002
Issued Date -
N/A
app pub date -
Jun 17, 1999
filing date -
Jul 1, 1997
priority date (Note) -
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Abstract
An asymmetric membrane comprising a tubular polymer film in combination with a tubular braid on which the film is supported, requires the braid be macroporous and flexible, yet sufficiently strong to withstand continuous flexing, stretching and abrasion during use for microfiltration (MF) or ultrafiltration (UF). The specifications for a braid of a long-lived membrane are provided. A membrane is formed by supporting a polymer film in which particles of calcined .alpha.-alumina are dispersed, on the defined tubular braid.
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