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| High-Tech
Applications for Membranes |
Diagnostic test kits
Wound dressings
HEPA filtration
Clean-room garments
Hydroponic farming
Transdermal patches
Spiral wound modules
Plasmapheresis
Drape and gown fabrics
Medical packaging
Affinity/Chromatography |
New
Industrial
Applications for
Membranes |
Strainer
bag filters
Filter presses
Plate and frame filters
Hydraulic/fluid power filters
Bag house filters
Rotary drum filters
Vacuum filters |
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Microporous
membrane
manufacturing is our primary business. Our standard product line (0.03 ¦Ìm-5 ¦Ìm range) can meet the
requirements of virtually any of your most inventive applications. |
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| Although it is difficult to give an exact
definition of a membrane, a more general definition could be:
a selective barrier between two phases, the term "selective"
being inherent to a membrane or a membrane process. It should
be noted that this is a macroscopic definition while separation
should be considered at the microscopic level. To obtain a more
informative understanding, membranes can simply be classified
by nature into two categories, i.e., biological and synthetic
membranes. |
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| A membrane filter is a thin, polymeric film
or filament made up of millions of microscopic pores. The pore
size of these pores determines the nominal pore size rating
of the membrane. Membrane filters can be used in quantitative
separation or the filtration of suspended matter from liquids and
gases. Membranes have many different properties that affect
the performance of the filter in applications.
Often times membrane filters are classified according to
their structures into several categories in terms of "pore
size" (listed from the smallest to the largest); namely,
gas separation membrane, dialysis/hemodialysis membranes,
reverse osmosis membranes, ultrafiltration membranes, and
microporous membranes.
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Microporous membrane is defined as a thin
walled structure having an open spongy morphology of precisely
controlled pore size typically ranging from 0.03 ¦Ìm up to
10 ¦Ìm in diameter. As far as membrane geometry is concerned,
three types of microporous membranes are commercially available:
flat sheet membrane, hollow fiber membrane, and tubular membrane.
The flat sheet geometry is the most popular and useful configurations
among these three types. Microporous membrane can be further
divided into unsupported and supported versions. |
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Microporous membranes are readily characterized
with various techniques including scanning electron microscopy,
bubble-point menthol, mercury intrusion porometry, and permeation
measurements. Among these methods, the first two are commonly
accepted and used in industries due to the ease and convenience
of testing procedures. |
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Microporous membrane has been industrialized
for many years in the U.S. and Europe, and found widespread
use in various fields such as Pharmaceuticals, Electronics,
Beverages, Chemicals, Environmental, and Analytical for traditional
filtration, purification, clarification, cold sterilization,
concentration and venting. In addition to traditional applications, microporous membrane
has also been recognized in non-traditional applications attributed
to its specific 3-dimensional pore structure and high surface
area per unit weight uniqueness. These applications include
drug-abuse tests, one-Northern blot, Southern blot, and battery
separator.
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2004
American Membrane Corporation. All Rights Reserved.