MEMBRANE FILTER
HM Membrane Filter
MCE
PES
CA
PVDF
PVDF-D
NYLON
PTEF-D
PTEF-H
Chemical Resistances
FILTERMEMBRANE FILTERHM Membrane Filter

HM MEMBRANE FILTER








The pore size of membrane filters is indicated by testing in three different ways. For example, Microorganism sampling (actual filtration for microorganism), Porosimeter (measuring changes of air pressure on filters / air flow) and Bubble point (pressure when air emits through a pore size of a wet filter)



As many fine holes are open, it is suitable to sample microorganism or particles.
A membrane filter has a porous film shape. Unlike filter paper which is formed with meshed fibers, it has a structure of circular
   holes connected to each other.
PTFE membranes are largely divided into four types: PTFE-H (hydrophilic), PTFE-J (thin membranes supported),
   PTFE-D (thick membranes supported), and PTFE-T (strong thermal resistance)
   (Select a proper filter depending on solvents. Selecting filters is an important factor for successful analysis.)




  Type MCE PES CA PVDF PVDF-D
Hydrophilic Hydrophilic Hydrophilic Hydrophilic/
Mild organic
solvents
Hydrophobic/
Mild organic
solvents
  Binding high low low very low low
  Chemical
  Compatibility
PH(3.5~8)
Restrictive
PH(1~14)
Restrictive
Restrictive well well
  Applications General
filtration,
aqueous solutions,
board experiments,
particle,
micro organism
Aqueous
solutions,
filtration of
alcoho
l media solvents,
filtration
sterilization of
medium and
sample solution,
low protein
absorption
Biochemical
experiments
or alcohol
media,
particle
removal tests
Aqueous solutions,
mild organic
solvents, HPLC
sample,
prefiltration,
low protein
absorption
Hydrophobic,
filter used for
mild organic
solvents
  SEM Image



  Type Nylon PTFE-D PTFE-J PTFE-H PTFE-T
Hydrophilic/
Mild polarity
organic solvents
Organic solvents Hydrophilic+
Organic solvents
Organic solvents
  Binding medium low low low low
  Chemical
  Compatibility
well very well very well very well the best
  Applications Hydrophilic,
purification
of mild organic
solvents,
high protein
absorption
Mild organic
solvents,
easy to handle
due to thick
membrane,
air vent and
all type of
solvents
Mild organic
solvents,
air vent,
electric, chemical
Filtration of water
or mixed solvents
in HPLC sample,
acid, alkali
particles
Mild organic
solvents, excellent
chemical
resistance,
high temperature,
special reagents,
acid, alkali
  SEM Image