Membranes

Membranes

I.W. Tremont offers a diverse product line of high quality
membrane filters available in a variety of materials,
diameters and pore sizes and suitable for a wide range
of applications including cell retention, In Vitro Diagnostics,
particle collection, clarification and sterile filtration of
aqueous solutions, particulate analysis and microbiological analysis.

The following membrane materials available include:

  • Mixed Cellulose Ester (MCE) - Biologically inert mixtures of cellulose acetate and cellulose nitrate result in membranes with a smoother and more uniform surface than pure nitrocellulose. Easy to handle, less cracking and fracturing than traditional CN membranes. A pure surface with no additional smoothing treatment or surfactants.
  • Nitrocellulose (NC) - 100% pure nitrocellulose membranes ensure the highest binding capacity possible and are commonly used for nucleic acid and protein detection in research and diagnostic applications.
  • Polyethersulfone (PES) – The PES membrane is hydrophilic which does not require external wetting agents or surfactants.
  • Polytetrafluoroethylene (PTFE) – Our unsupported porous PTFE material is equivalent to most of the leading suppliers of specialty analytical membranes. These membranes demonstrate exceptional physical characteristics, consistent pore size, high particle retention, high load rates and excellent flow rates. The incredibly high cellular pore structure is attributed to the techniques involved in manufacturing the material, providing a continuous, uniform homogenous structure.

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Specialty Products

I.W. Tremont offers a diverse range of specialty products to help you meet your specific testing and application requirements.IWTremont Bench Protector Paper

All of our products are manufactured to the highest standards in the industry and are supported with our technical expertise and superior customer service.

The following specialty products include:

In-Line Filters
Laboratory Bench Protector Paper
Microbiological Monitors
Petri Dishes
Vacuum Cups and Receiver Bottles
Weighing Paper

Download product literature now!

  • Products
  • Material Specifications
  • Capabilities
Membrane Material Retention µm Options
     
Mixed Cellulose Ester (MCE) 0.22
0.45
0.80

or

0.22
0.45
Sold separately as Sterile or Non-Sterile, blank or gridded membranes

or

 Vacuum Cups and Receiver Bottles
Polytetrafluoroethylene (PTFE) 0.8
5.0
10.0

or

0.22
0.45
Sold separately as non-sterile membranes in a variety of diameters and pack sizes

or

Sold as sterile in-line filters in a polypropylene housing designed for vacuum systems & venting applications
Nitrocellulose (NC) 0.2
0.45
Not sold separately

 Microbiological Monitors
Polyethersulfone (PES) 0.22
0.45
Not sold separately

 Vacuum Cups and Receiver Bottles

Additional membranes can be found in the Syringe Filters Product section Here

 

Product Catalog #

Description

045SG-047 Hydrophilic Mixed Cellulose Esters, 0.45 micron, sterile, gridded, 47mm diameter (1000 case) 5 x 200 packs
045SG-047-B Hydrophilic Mixed Cellulose Esters, 0.45 micron, sterile, gridded, 47mm diameter (600 case) 3 x 200 packs
045SG-047-C Hydrophilic Mixed Cellulose Esters, 0.45 micron, sterile, gridded, 47mm diameter, pack of 100
045SG-047-D Hydrophilic Mixed Cellulose Esters, 0.45 micron, sterile, gridded, 47mm diameter, pack of 200
IWT-MCE020025 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.22 micron, 25mm diameter, pack of 100
IWT-MCE020047 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.22 micron, 47mm diameter, pack of 100
IWT-MCE045025 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.45 micron, 25mm diameter, pack of 100
IWT-MCE045047 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.45 micron, 47mm diameter, pack of 100
IWT-MCE080025 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.80 micron, 25mm diameter, pack of 100
IWT-MCE080047 Hydrophilic Mixed Cellulose Esters, NON-STERILE, 0.80 micron, 47mm diameter, pack of 100
IWT-FB-10350 0.22 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
IWT-FB-10351 0.45 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
IWT-FF-10358 0.22 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel only, qty 24
IWT-FF-10359 0.45 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel only, qty 24
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PTFE008-013 PTFE membrane, 0.8μm, 13mm diameter, 100 pack, pure virgin material
PTFE008-025 PTFE membrane, 0.8μm, 25mm diameter, 100 pack, pure virgin material
PTFE008-032 PTFE membrane, 0.8μm, 32 mm diameter, 100 pack, pure virgin material
PTFE008-037 PTFE membrane, 0.8μm, 37 mm diameter, 100 pack, pure virgin material
PTFE008-047 PTFE membrane, 0.8μm, 47mm diameter, 50 pack, pure virgin material
PTFE008-055 PTFE membrane, 0.8μm, 55mm diameter, 25pack, pure virgin material
PTFE008-090 PTFE membrane, 0.8μm, 90mm diameter, 10 pack, pure virgin material
PTFE008-142 PTFE membrane, 0.8μm, 142mm diameter, 10 pack, pure virgin material
PTFE050-013 PTFE membrane, 5.0μm, 13mm diameter, 100 pack, pure virgin material
PTFE050-025 PTFE membrane, 5.0μm, 25mm diameter, 100 pack, pure virgin material
PTFE050-032 PTFE membrane, 5.0μm, 32mm diameter, 100 pack, pure virgin material
PTFE050-037 PTFE membrane, 5.0μm, 37mm diameter, 100 pack, pure virgin material
PTFE050-047 PTFE membrane, 5.0μm, 47mm diameter, 50 pack, pure virgin material
PTFE050-055 PTFE membrane, 5.0μm, 55mm diameter, 25 pack, pure virgin material
PTFE050-090 PTFE membrane, 5.0μm, 90mm diameter, 10 pack, pure virgin material
PTFE050-142 PTFE membrane, 5.0μm, 142mm diameter, 10 pack, pure virgin material
PTFE010-013 PTFE membrane, 10.0μm, 13mm diameter, 100 pack, pure virgin material
PTFE010-025 PTFE membrane, 10.0μm, 25mm diameter, 100 pack, pure virgin material
PTFE010-032 PTFE membrane, 10.0μm, 32mm diameter, 100 pack, pure virgin material
PTFE010-037 PTFE membrane, 10.0μm, 37mm diameter, 100 pack, pure virgin material
PTFE010-047 PTFE membrane, 10.0μm, 47mm diameter, 50 pack, pure virgin material
PTFE010-055 PTFE membrane, 10.0μm, 55mm diameter, 25 pack, pure virgin material
PTFE010-090 PTFE membrane, 10.0μm, 90mm diameter, 10 pack, pure virgin material
PTFE010-142 PTFE membrane, 10.0μm, 142mm diameter, 10 pack, pure virgin material
IWT-ES10500 PTFE inline membrane filter, 50mm dia, porosity 0.22µm, STERILE filter with 1/4" to 3/8” barb ports, 10 pack
IWT-ES10502 PTFE inline membrane filter, 50mm dia, porosity 0.45µm, STERILE filter with 1/4" to 3/8” barb ports, 10 pack
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MB-0025 Disposable sterile filtration units, 100 ml, white, gridded, nitrocellulose, membrane filter 0.2µm, not welded, pack of 50
MB-0027 Disposable sterile filtration units, 100 ml, white, gridded, nitrocellulose, membrane filter 0.45µm, not welded, pack of 50
IWT-FB-10352 0.22 micron, PES membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
IWT-FB-10353 0.45 micron, PES membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
IWT-FF-10360 0.22 micron, PES membrane, 50mm diameter, 250ml Capacity funnel only, qty 24
IWT-FF-10361 0.45 micron, PES membrane, 50mm diameter, 250ml Capacity funnel only, qty 24
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Specialty Products

 Product Catalog #          Product Description                                                                                                                                                                              
ES10500 PTFE inline membrane filter, 50mm dia, porosity 0.22µm, STERILE filter with 1/4" to 3/8" barb ports, 10 pack
ES10502 PTFE inline membrane filter, 50mm dia, porosity 0.45µm, STERILE filter with 1/4" to 3/8" barb ports, 10 pack
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BPR4850M Bench Protector Paper Roll 48CM x 100M, 1 roll/pk
BPS4860 Bench Protector Paper Sheets 48CM x 60CM, 100 sheets/pk
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MB-0025 Disposable sterile filtration units, 100 ml, white, gridded, nitrocellulose, membrane filter 0.2µm, not welded, pack of 50
MB-0027 Disposable sterile filtration units, 100 ml, white, gridded, nitrocellulose, membrane filter 0.45µm, not welded, pack of 50
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MB-2050 Petri dishes 55mm diameter sterilized by Gamma radiation. x 720 units
MB-2051 Petri dishes 55mm diameter w/cellulose pad sterilized by Gamma radiation. x 100 units.
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FB-10350 0.22 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
FB-10351 0.45 micron, MCE membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
FB-10352 0.22 micron, PES membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
FB-10353 0.45 micron, PES membrane, 50mm diameter, 250ml Capacity funnel, bottle capacity 250ml, qty 12
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W33 Weighing Paper, Nitrogen free, squares 3x3in. 500/pk
W44 Weighing Paper, Nitrogen free, squares 4x4in. 500/pk
W66 Weighing Paper, Nitrogen free, squares 6x6in. 500/pk
Membrane Material Diameter mm Pore Size (µm)
     
Mixed Cellulose Ester (MCE) 50 0.22 (sterilizing)
0.45 (clarification)
0.80 (clarification)
Polytetrafluoroethylene (PTFE) See chart below for detailed specifications
Nitrocellulose (NC) 47 0.2
0.45
Polyethersulfone (PES) 50 0.22 (sterilizing)
0.45 (clarification)

Our unsupported porous PTFE material is equivalent to most of the leading suppliers of specialty analytical membranes. These membranes demonstrate exceptional physical characteristics, consistent pore size, high particle retention, high load rates and excellent flow rates. The incredibly high cellular pore structure are attributed to the techniques involved in manufacturing the material, providing a continuous, uniform homogeneous structure.

  • Unsupported, virgin PTFE material
  • Chemically Inert
  • Hydrophobic
  • Heat stable from -450°F to 500°F
  • Thicknesses from 0.010 inch to 0.300 inch
  • Pore volumes from 50 - 90%
  • Flame retardant
  • Easy caking removal
  • Low electrical conductivity
  • Pore sizes from 0.8µm to 100µm
  • Customizable flow rates
  • Customizable surface harnesses
  • Analytical
  • Invitro Diagnostics
  • Venting
  • Industrial gasketing
  • Liquid or gas filtration
  • Filtration of acids or bases
  • Customizable flow rates
  • Customizable surface harnesses
  • Analytical
  • Invitro Diagnostics
  • Venting
  • Industrial gasketing
  • Liquid or gas filtration
  • Filtration of acids or bases

In-Line Filters

  • Materials of Housing Construction: Polypropylene
  • Sealing technology: ultrasonically welded
  • Membrane material: PTFE (Polytetrafluoroethylene)
  • Pore size: 0.22 µm or 0.45 µm
  • Membrane diameter: 50 mm
  • Connectors: 50 mm: 1/4" to 3/8" barb ports

Laboratory Bench Paper

  • Material: Pure cellulose with polyethylene backing
  • Basis Weight: 140 g/m2 (86 lbs/3,000 ft2) - TAPPI T410
  • Thickness: 0.22mm (0.0086 in, 8.66 mil) - TAPPI T411
  • Surface:

                      (A) Smooth, bright white highly absorptive
                      (B) Smooth polyethylene clear laminate

Microbiological Monitors

  • Membrane Material: Cellulose Nitrate
  • Pore sizes: 0.2µm (sterilizing) or 0.45µm (clarification)
  • Membrane Diameter: 47mm
  • Membrane Color: White
  • Grid Color: Black
  • Welded to Cup: No
  • Filtration Unit: Polypropylene sterilized by gamma irradiation

Petri Dishes

  • Diameter: 55mm
  • Height: 15mm
  • Material: Crystal Polystyrene
  • Sterility Mode: Gamma Radiation
  • Available Empty or with Cellulose Pad

Vacuum Cups and Receiver Bottles

  • Material of Construction:
  • Funnel & Bottle: Polystyrene
  • Screw Cap: Polyethylene
  • Membrane Materials Available:
  • PES (Polyethersulfone)
  • MCE (Mixed Cellulose Ester)
  • Pore Sizes Available:
  • 0.22µm (sterilizing)
  • 0.45µm (clarification)
  • Membrane Diameter: 50mm
  • Funnel Capacity: 250mL
  • Bottle Capacities Available:
  • 250mL
  • 500mL

Weighing Paper

  • Semi-opaque, milk white calendared cellulose paper,
  • high gloss, non-absorbent, nitrogen-free.
  • Basis Weight:
  • Target 30lb (per 3000ft2) 48.8 g/m2
  • Range 29.0lb – 31.0lb
  • TAPPI method T410
  • Target Thickness: 0.0015 inch (.05mm) 1.5mil

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