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Filtering discs
Technofilter offers a wide range of flat filters incorporating various polymer membranes for industrial and laboratory filtration as well as for microbiological, sanitary-epidemiological and physico-chemical analyses.
ММК microporous Сapron membranes
Description
ММК microporous Capron membranes are white porous films with a broad pore size range, produced by Technofilter's proprietary technology on the basis of Capron by wet casting.
Due to high porosity and controlled pore size, ММК membranes have high microparticle retention capacity and high filtration rate. ММК membranes meet the requirements to medical products and materials that are intended for long-term contact with blood and lymph (certificates No РОСС Ru.ИМ08.НО7715 and No РОСС Ru.ИМ13.НО2313).
Material
ММК membrane is a ‘hydrophilic' polyamide membrane made of Capron (Nylon-6). ММК membranes have a coarse cellular structure with thin microporous partition walls, which predetermines continuity of the structure and makes it strong and flexible in dry and wet conditions.
Main applications
- Fine and sterilizing filtration of aqueous solutions and blood preparations
- Clarifying and sterilizing filtration of parenteral preparations and small-volume pharmaceutical fluids
- Prefiltration and sterilizing filtration of aggressive media (diluted acids, alkalies, solvents, photoresists).
Technical characteristics and advantages
- Intrinsic hydrophilicity (instantly wetted by water)
- Quite high filtration rate
- Broad pore size range
- Extremely low content of extractables (~3 mkg/cm2)
- Withstands more than 10 cycles of sterilization with saturated steam by autoclaving at t=121°C and γ-irradiation with no change in structural/filtration characteristics
- Stable to alkaline solutions, chemicals and solvents.
Standard diameter of discs, mm: 13, 25, 35, 47, 90, 142, 293. Optionally, customers can specify any disc diameter no more than 293 mm.
Operating conditions
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Maximum operating temperature, °C
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65 (75 for a short time)
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pH range
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3-14
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Maximum permissible differential pressure, MPa
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0.5
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Operating characteristics
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Pore size, μm
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0.1
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0.2
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0.45
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0.65
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0.8
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1.0
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1.2
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2.0
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3.0
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Initial filtration rate for distilled water at P=0.10 MPa, ml/cm2.min, in the range from ... to ...
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4-6
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8-12
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22-40
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50-90
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95-120
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140-180
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180-220
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230-280
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300-360
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Minimum bubble point, MPa
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0.510
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0.365
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0.240
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0.150
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0.120
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0.095
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0.080
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0.065
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0.058
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Rupture strength, MPa, no less than,
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- dry
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6.0
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5.5
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5.0
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4.5
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4.0
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3.5
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3.0
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3.0
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2.5
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Elongation at rupture, %, in the range from ... to ...
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- dry
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25-30
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20-25
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-
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10-15
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-
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9-12
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6-9
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-
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4-7
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- water wet
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-
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60-80
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-
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-
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-
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-
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-
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-
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-
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Example of order: ММК-020-293
MMPA+ (ММПА+) microporous polyamide membrane with positive potential
For sanitary-virological control of water and sterilizing filtration of liquids
Description
A method has been developed for producing positively charged polyamide-based microfiltration membranes (specification No 9471-023-10471723-2006). The membranes exhibit increased sorption capacity with respect to viruses, coliphages and pyrogens and retain the functional characteristics of uncharged ММК membranes. ММПА+ polyamide microporous membranes with positive zeta potential are porous white films produced using Technofilter's proprietary technology on the basis of polyamide (Nylon-6).
ММPА+ membranes have a coarse cellular structure with thin microporous partition walls, which predetermines continuity of the structure and makes it strong and flexible in dry and wet conditions. Due to high porosity and controlled pore size the membranes display high retention efficiency with respect to microparticles at high filtration rates.
ММPА+ membranes withstand mechanical, chemical and thermal loads and are biologically inert. The membranes are readily wetted with water and various aqueous solutions. The membranes are stable in aqueous media with pH values of 3 to 14 as well as in most organic solvents. ММPА+ membranes incorporated into МFМ-0142 filter units have been tested and recommended by A.N.Sysin State Research Institute of Human Ecology and Environment Hygiene (Russian Academy of Medical Sciences) for sanitary-virological investigations of water in laboratories of research institutes and sanitary-and-epidemiological stations.
Material
ММPА+ membrane is a ‘hydrophilic' polyamide (Nylon-6) membrane with positive potential.
Pore size, μm: 0.1; 0.2; 0.45.
ММPА+ membranes meet the requirements to medical products and materials intended for long-term contact with blood and lymph (certificates No РОСС Ru.ИМ08.НО7715 and No РОСС Ru.ИМ13.НО2313).
Main applications
- Sanitary-virological control of tap water, water in open natural reservoirs, swimming pools, groundwater springs, effluents, etc.
- Concentrating viruses and phages from waters of various origins
- Reducing the concentration of mycoplasmas and bacterial endotoxins (pyrogens) in pharmaceutical water systems
- Sterilizing filtration and removal of pyrogens from small-volume parenteral preparations and pharmaceutical liquids
Characteristics and advantages
- 100% sorption and controlled elution of viruses
- Inherent hydrophilicity (instantly wetted by water)
- High strength, flexibility, thermal and chemical stability
- Quite high filtration rate
- Non-toxic, containing an extremely small amount of extractables
- The membranes withstand more than 10 cycles of thermal sterilization by autoclaving at 121°C and γ-irradiation with no change in mechanical and structural-filtration characteristics
- Resistant to alkaline solutions, alcohols, chemicals and solvents
Diameter of standard discs, mm: 13, 25, 35, 47, 50, 142, 170, 293. Optionally, customers can specify any disc diameter no more than 293 mm.
Example of order: ММPА+-020-142
МFFК/МFFК.G hydrophobic and hydrophilic fluoroplastic microfiltration membranes
Description
МFFК (МFFК.G) fluoroplastic composite membrane is a porous film material based on Ф42Л fluoroplastic (tetrafluoroethylene/vinylidene fluoride copolymer) reinforced with various non-woven materials (polypropylene, Lavsan (Dacron)), having pores 0.05, 0.15, 0.25, 0.45 or 0.65 μm in size and total porosity of 80 to 85%.
Applications
- Prefiltration and sterilizing filtration of air and gases
- Microfiltration of alcohols, hydrocarbons, oils, acids, alkalies and organic solvents (excluding ketones, esters and amide solvents)
- Fine cleaning of pharmaceutical and biological liquids having high or low pH levels (hydrophilic)
Technical characteristics and advantages
- Stable to most strong and weak acids
- Biologically inert
- Feature high mechanical strength and thermal stability
- Withstand sterilization by autoclaving and γ-irradiation
When used for filtration of aqueous solutions, the membranes should be pretreated with aliphatic alcohols or their aqueous solutions
Disc diameters, mm: 13, 25, 35, 47, 50, 90, 142, 293
Operating conditions
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Maximum operating temperature, °C
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75 (80 for a short time)
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pH range
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1-12
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Maximum permissible differential pressure, MPa
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0.5
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Operating characteristics of hydrophobic membranes
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Membrane grade
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МFFК-0
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МFFК-1
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МFFК-2
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МFFК-3
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МFFК-4
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Pore size, μm
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0.05
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0.15
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0.25
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0.45
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0.65
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Initial flow rate for ethanol at P=0.05 MPa, dm3/m2/hour, no less than
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100
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110
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3200
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7500
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16000
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Bubble point for ethanol, KPa (kgf/cm2), in the range from ... to ...
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300±60 (3.0±0.6)
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180±30 (1.8±0.3)
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120±40 (1.2±0.4)
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56±20 (0.56±0.2)
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40±10 (0.4±0.1)
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Operating characteristics of hydrophilic membranes
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Membrane grade
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МFFК-1G
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МFFК-2G
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МFFК-3G
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МFFК-4G
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МFFК-5G
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Pore size, μm
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0.15
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0.25
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0.45
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0.65
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0.80
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Initial flow rate for ethanol at P=0.05 MPa, dm3/m2/hour, no less than
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1100
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3210
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7500
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16000
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20000
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Bubble point for ethanol, KPa (kgf/cm2), in the range from ... to ...
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360±60 (3.6±0.6)
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260±60 (2.6±0.6)
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110±40 (1.1±0.4)
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80±20 (0.8±0.2)
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60±20 (0.6±0.2)
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Example of order: MFFK (МФФК)-025-142
MFFK.G (МФФК.Г)-045-293
Filter cardboards
KFBZG (КФБЖ) cardboard for filtration of biological fluids
Description
КФБЖ glass fibre cardboard is used for prefiltration of biological fluids having a high level of particle detachment. This is a depth filter that significantly reduces the load on membrane filters. The prefilter made of glass fibre is installed in the filter holder directly on top of the membrane filter and is intended for prefiltration of heavily contaminated solutions. КФБЖ filters are sterilized by autoclaving at 121°C.
Main applications
In biopharmaceutical industry for prefiltration of:
- biological fluids;
- medicinal preparations;
- solutions for parenteral nutrition;
- blood serum.
Technical characteristics and advantages
- Biological inertness with respect to media being filtered
- High throughput
- High holding capacity with respect to particles sized 0.5 to 3 μm or more
Material
Cardboard based on microfibres of glass and cellulose.
Diameter of standard discs, mm: 13, 25, 35, 47, 50, 90, 142, 170, 293. Optionally, customers can specify any disc diameter.
Operating characteristics
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Designation
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КФБЖ glass cardboard
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Effective size of retained particles, μm
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No less than 99%
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3
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0.9
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No less than 98%
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1
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0.5
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Weight per unit area, g/m2
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170±10
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131.6
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Thickness, mm
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0.7±0.1
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0.56
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Ultimate tensile stress in machine direction, MPa, no less than
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0.3
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Initial flow rate for distilled water at P=0.05 MPa, ml/cm2-min, no less than
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400 to 450
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100 to 150
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