Membranes and Specialty Products

"To build long term customer relationships through value and excellent service."

Membranes and Specialty Products

I.W. Tremont offers a line of high quality
membrane filters available in a variety of
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

Download product literature now!


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.

Specialty products include:

  • In-Line Filters
  • Laboratory Bench Protector Paper and Pads
  • Microbiological Monitors
  • Petri Dishes
  • Weighing Paper

Download product literature now!



Material Specs

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)

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

In-line Venting and Filter, Thin Format

  • Thin line in-line venting and filtration units are ideally suited for venting applications and filtration of fluidic volumes too large for syringe filters.
  • Variety of standard filter media including borosilicate glass microfiber
  • Barbs are a 5-15mm tapered step with 4mm ID, compatible with slip port style high volume syringes
  • Ultrasonically welded (no adhesives or solvents) to withstand light duty vacuum (<70cmHg) or positive pressure (50psi)
  • Light weight filter will not kink most vent tubing, a problem that causes failed reactions and low yield incubations
  • Transparent inlet side allows a visual indication of filter loading
  • Typical applications include venting of carboys, stir bottles, reservoir tanks, bio reactors and low-pressure reactor flasks
  • Suited for vacuum or positive pressure filtration applications and tank to smaller vessel transfers and filtration of media or broth
  • Operates with very low backpressure, even wetting and linear flow rates
  • Polypropylene housing is molded with pure virgin material, naturally chemical resistant and has very low extractables commonly known to cause background noise for analysis applications
  • Made in the USA and QA tested using a 12-point pre and post manufactured methodology

Low Metals Water Analysis Filter, Thin Format

  • Polypropylene filter units, 50mm inline configuration with hydrophilic Nylon membrane and 100% pure Quartz low or ultra low metals microfiber prefilter
  • Filtration area: 20.0cm2
  • Hose Barbs: 5-15mm stepped, ID 4mm (consistent with syringe slip port OD)
  • Excellent lot-to-lot reproducibility and are verified against a standard using analysis techniques such as GC, TGA & DSC.
  • Manufactured in the USA

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

Microbiological Monitors

  • Membrane Material: MCE
  • Pore sizes: 0.45µm (clarification)
  • Membrane Diameter: 47mm
  • Membrane Color: White
  • Grid Color: Black
  • Welded to Cup: No
  • Filtration Unit: Polystyrene sterilized by gamma irradiation

Petri Dishes

  • Diameter: 60mm
  • Height: 15mm
  • Material: Crystal Polystyrene
  • Sterility Mode: Gamma Radiation
  • Available Empty or with Cellulose Pad

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

Laboratory Spill Containment Bench Pad / Wipe

  • Designed with a complex proprietary fused 100% Polypropylene (PP) fibrous matrix which is a lightweight polyolefin
  • Has high chemical resistance to most short term exposure of organic solvents, acids and alkalis
  • 290g/m2 basis weight sufficient to easily handle typical lab bench volume spills up to 600ml safely and quickly.
  • Lays flat as a bench pad with sufficient stiffness reducing “bunch up” seen with other competing brands
  • Soft enough to be used as a wipe
  • Binding dots accumulate fluids and migrate deeper into the pad allowing fast surface absorption and higher fluid hold saturation

Products

Membrane Material Retention µm Options
     
Mixed Cellulose Ester (MCE) 0.22
0.45
0.80

or

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

or

 Microbiological Monitors
Polytetrafluoroethylene (PTFE)



0.22
0.45
Not sold separately

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 Syringe filters

Polyethersulfone (PES) 0.22
0.45
Not sold separately

 Syringe filters

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

 

Product Catalog # Product 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
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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-0027 Disposable sterile filtration units, 100 ml, white, gridded, nitrocellulose, membrane filter 0.45µm, not welded, pack of 50IWT-FB-10352
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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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LMNQ-0500 50mm Low metals Quartz prefilter, 0.45µm Nylon membrane, 2/pk
LMNQ-0501-HT 50mm Very Low metals Quartz prefilter, 0.45µm Nylon membrane, 2/pk
LMNQ-0510 50mm Low metals Quartz prefilter, 0.45µm Nylon membrane, 20/pk 
LMNQ-0511 50mm Low metals Quartz prefilter, 0.45µm Nylon membrane, 50/pk  
LMNQ-0520-HT 50mm Very Low metals Quartz prefilter, 0.45µm Nylon membrane, 20/pk
LMNQ-0521-HT 50mm Very Low metals Quartz prefilter, 0.45µm Nylon membrane, 50/pk
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TL-0550 50mm Nano-Scale glass microfiber Grade A-83 @ 0.5µm, 10/pk
TL-0551 50mm Borosilicate glass microfiber Grade F @ 0.7µm, 10/pk
TL-0552 50mm Borosilicate glass microfiber Grade B @ 1.0µm, 10/pk
TL-0553 50mm Borosilicate glass microfiber Grade TSS @ 1.5µm, 10/pk
TL-0554 50mm Borosilicate glass microfiber Grade VSS® @ 1.5µm, 10/pk
TL-0555 50mm Borosilicate glass microfiber Grade D @ 2.7µm, 10/pk
TL-0570 50mm Nylon membrane, hydrophilic @ 0.45µm, 10/pk
TL-0571 50mm PTFE membrane, hydrophobic @ 0.45µm, 10/pk
TL-0572 50mm UHMWPE membrane, highly hydrophobic @ 0.22µm, 10/pk
TL-0585 50mm High purity CA fibrous depth media, hydrophilic, 1.0 µm, 10/pk
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HAP-150180-BX Chemically resistant, highly absorbent green quilted bench pad, approx. 15x18 inch, 50/pk
HAP-150900-BX Chemically resistant, highly absorbent green quilted bench pad/wipe, approx. 15x9 inch, 100/pk
HAP-050450-BX Chemically resistant, highly absorbent green quilted bench wipe, approx. 5x4.5 inch, 100/pk
HAP-150180-CS Chemically resistant, highly absorbent green quilted bench pad, approx. 15x18 inch,  250/cs
HAP-150900-CS Chemically resistant, highly absorbent green quilted bench pad/wipe, approx. 15x9 inch, 500/cs
HAP-050450-CS Chemically resistant, highly absorbent green quilted bench wipe, approx. 5x4.5 inch, 500/cs
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-0027 Disposable sterile filtration units, 100 ml, white, gridded, MCE, 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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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

Capabilities

We offer OEM capabilities for engineering, molding and insertion of many additional membrane and membrane/pre-filter options.   We can work with most of our own membrane and specialty materials as well as convert your supplied product.  Please contact us for full engineering capabilities as well as process flow and project management services in this field.

  • Filter insertion in clean room by manual as well as fully automated means
  • Molding in place, over molding and support structure molding of fragile media
  • Ultrasonic welding of barrel structure for increased leak / burst resistance
  • Multi-process mold extensions for inclusion of single or multi-level prefiltration media
  • Digital variable print capabilities along arc on barrel face for identification purposes
  • Blister packing for EO and gamma sterilization
  • Pure virgin PP, verified by HPLC against U/L extractables

Tremont offers an impressive list of manufacturing capabilities and expertise in glass microfiber and cellulose filter media.  We leverage a longstanding and contractual relationship between several mills to put 6 papermaking machines and formers into production.  With this enormous capacity at our disposal, we are able to take a project from lab bench through pilot scale and ultimately full production with ease.

Our partner mill output exceeds 120 grade variants manufactured in the USA and internationally.   With chemists and scientists of several disciplines, experienced papermakers, the finest controls-on-machine plus a rigorous QA protocol, it is not often a project challenge is beyond our capability.

Paper making capabilities:

  • Paper making machines in flat bed, slant bed, high speed fourdrinier and rotary forming styles
  • Furnish capabilities of: glass blends, cotton cellulose, soft wood, cotton/wood pulp, synthetics
  • Various levels of water filtration, including R.O. for superior purity in analytical and diagnostic applications
  • Web widths from 24 inch (60.9cm) to 72 inch (182.8cm)
  • Basis weights from 8lb to 138lb @ 3000ft2 (13g/m2 to 225g/m2)
  • Binder free, Binder burn off, Acrylic, PVA and hybrid chemistries
  • Gantry mounted traversing densitometry as well as most other high-resolution verification sensors
  • Static pressure, mixed and multi-stage head boxes
  • Binderless, mixed box, spray on and pulper-saturation style binder introduction
  • Single and multi-stage vacuum boxes
  • Several screen variants for very high consistency formation
  • Wet stream or dry deckle trim
  • Unique end of machine board cut-off capability for very high density, high basis weight celluloses
  • FDA grade manufacturing capabilities
  • Lot selection, furnish verification and supply chain assurance
  • Cotton batch traceability "to farm" with unique commodity procurement services
  • Converting capabilities

After the papermaking process is complete, our experienced converting staff brings your project from large master rolls down to narrow reels or sheets with ease.  Sheeting, die cutting and other unique converting operations are performed at our Hawthorne, NJ facility under our strict ISO production environments.

For more details about Tremont's converting capabilities,Click Here



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