Membranes
I.W. Tremont offers a 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.
I.W. Tremont polymeric nylon and PTFE membranes are cast by leading OEM raw material suppliers who also supply many of the most widely known competitive brands. All materials are held to the highest quality standards with our in house testing and quality assurance using the latest materials science instrumentation. Converting and packaging is performed in Hawthorne, New Jersey to offer the broadest product range with high stock level availability and rapid shipping. Our production method brings exceptional value and quality.
These materials are also offered in custom product variants and OEM. Inclusion of these and other materials within structured devices such as syringe filters and inline housings can be performed quickly with surprisingly low minimums.
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.
- Pure surface with no additional smoothing treatment or surfactants
Nylon Membrane
- Supported with a polyethylene terephthalate (PET) scrim for added support.
- Scrim bonded using unique technique utilizing no bonding agent for purity and chemical compatibility. Lower extractables.
- Hydrophilic material eliminates need for wetting agents.
- Strong protein bonding with high recoveries
Polytetrafluoroethylene (PTFE) Membrane
- Supported with a polypropylene (PP) scrim for easier handling
- Scrim bonded using unique technique utilizing no bonding agent for purity and chemical compatibility. Lower extractables.
- Hydrophobic material is effective in separating polar/nonpolar solvents
- Aqueous solutions can pass after prewetting with methanol
Polypropylene (PP) Depth Filter
- 100% High purity PP fiber depth filter with wide chemical compatibility.
- Highly hydrophilic, rapidly wets and demonstrates fast flow rates.
- Ideal as a membrane prefilter. Effective solids capture and retention.
Membrane Material Specs
| 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 | Sold separately, with polypropylene supporting scrim for strength or Sold as sterile in-line filters in a polypropylene housing designed for vacuum systems & venting applications |
| Nylon | 0.22 0.45 | Sold separately, with polypropylene supporting scrim for strength |
| Polypropylene Fiber Depth Filter | 1.00 | Sold separately. Fiber depth filter |
| Polypropylene (PP) | 0.22 0.45 | Not sold separately. Microbiological. Monitors Syringe filters |
| Nitrocellulose (NC) | 0.22 0.45 | Not sold separately. Microbiological. Monitors Syringe filters |
| Cellulose Acetate (CA) | 0.22 0.45 | Not sold separately. Syringe filters |
| Polyvinylidene Difluoride (PVDF) | 0.22 0.45 | Not sold separately. Syringe filters |
| Polyethersulfone (PES) | 0.22 0.45 | Not sold separately. Syringe filters |
Membrane Filter Products
Mixed Cellulose Ester (MCE)
| 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 |
Polytetrafluoroethylene (PTFE)
| Product Catalog # | Product Description |
|---|---|
| IWT-PTFE-022025 | Hydrophobic PTFE membrane, NON-STERILE, 0.22 micron, 25mm diameter, pack of 100 |
| IWT-PTFE-022047 | Hydrophobic PTFE membrane, NON-STERILE, 0.22 micron, 47mm diameter, pack of 100 |
| IWT-PTFE-022090 | Hydrophobic PTFE membrane, NON-STERILE, 0.22 micron, 90mm diameter, pack of 100 |
| IWT-PTFE-022142 | Hydrophobic PTFE membrane, NON-STERILE, 0.22 micron, 142mm diameter, pack of 25 |
| IWT-PTFE-045025 | Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 25mm diameter, pack of 100 |
| IWT-PTFE-045047 | Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 47mm diameter, pack of 100 |
| IWT-PTFE-045090 | Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 90mm diameter, pack of 100 |
| IWT-PTFE-045142 | Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 142mm diameter, pack of 25 |
| IWT-PTFE-080025 | Hydrophobic PTFE membrane, NON-STERILE, 0.80 micron, 25mm diameter, pack of 100 |
| IWT-PTFE-080047 | Hydrophobic PTFE membrane, NON-STERILE, 0.80 micron, 47mm diameter, pack of 100 |
| IWT-PTFE-080090 | Hydrophobic PTFE membrane, NON-STERILE, 0.80 micron, 90mm diameter, pack of 100 |
| IWT-PTFE-080125 | Hydrophobic PTFE membrane, NON-STERILE, 0.80 micron, 142mm diameter, pack of 25 |
Nylon
| Product Catalog # | Product Description |
|---|---|
| IWT-NY-022025 | Hydrophilic Nylon membrane, NON-STERILE, 0.22 micron, 25mm diameter, pack of 100 |
| IWT-NY-022047 | Hydrophilic Nylon membrane, NON-STERILE, 0.22 micron, 47mm diameter, pack of 100 |
| IWT-NY-022090 | Hydrophilic Nylon membrane, NON-STERILE, 0.22 micron, 90mm diameter, pack of 100 |
| IWT-NY-022142 | Hydrophilic Nylon membrane, NON-STERILE, 0.22 micron, 142mm diameter, pack of 25 |
| IWT-NY-045025 | Hydrophilic Nylon membrane, NON-STERILE, 0.45 micron, 25mm diameter, pack of 100 |
| IWT-NY-045047 | Hydrophilic Nylon membrane, NON-STERILE, 0.45 micron, 47mm diameter, pack of 100 |
| IWT-NY-045090 | Hydrophilic Nylon membrane, NON-STERILE, 0.45 micron, 90mm diameter, pack of 100 |
| IWT-NY-045142 | Hydrophilic Nylon membrane, NON-STERILE, 0.45 micron, 142mm diameter, pack of 25 |
Polypropylene Fiber Depth Filter
| Product Catalog # | Product Description |
|---|---|
| IWT-PPDM-100025 | Hydrophilic PP depth media, NON-STERILE, 1.00 micron, 25mm diameter, pack of 100 |
| IWT-PPDM-100047 | Hydrophilic PP depth media, NON-STERILE, 1.00 micron, 47mm diameter, pack of 100 |
| IWT-PPDM-100090 | Hydrophilic PP depth media, NON-STERILE, 1.00 micron, 90mm diameter, pack of 100 |
| IWT-PPDM-100142 | Hydrophilic PP depth media, NON-STERILE, 1.00 micron, 142mm diameter, pack of 25 |
Our Membrane Filter 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.