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Manufacture of microporous membranes - SABEU Plastik & Membran Technologie

SABEU - Plastics and Membrane Technology

P: +49 5551 9101-00
E-Mail: info@sabeu.com

Manufacture of microporous membranes

SABEU develops and manufactures its own microporous membranes under the TRAKETCH® brand and customizes membranes for different filtration solutions.

The products are used for filtration, sealing and degassing of chemicals as well as the sterile venting in life sciences and medical technology applications, e.g. solutions for mobile diagnostics, monitoring and therapy systems.

The projects are realized in-house, from the product development, to the automation process, production, surface finishing, lamination and assembly.

Properties of TRAKETCH® membranes

  Precisely definable pore sizes
  Very small manufacturing tolerances
  Exact exclusion limits (cut-off)
  High thermal stability
  Flat and smooth surfaces
  Biologically inert / non-toxic to cells (USP class VI)
  Extremely low levels of extractable components
  Conforming to FDA and EC food standards
  Low levels of non-specific protein binding
  Low affinity for staining, therefore high optical contrast
  Non-hygroscopic
  Sterilizable (gamma, autoclaving, EtO)
  Pleatable

The possibility to develop and manufacture molding tools and injection-molded components aside from membranes and to process them further to obtain a finished packaged product, enables us to offer our customers outstanding quality assurance, simplified sourcing processes and therefore fast processes and optimized cost structures. 

Properties of TRAKETCH<sup>®</sup> membranes

TRAKETCH® Discs

The 10 µm thin TRAKETCH® PC disc with a diameter of 47 mm is used with pore sizes of 0.2 µm or 0.4 µm.

A typical application in water analysis: a membrane is used as a method to detect legionellae. Because of the precisely defined pores, all legionellae stay on the surface of the membrane. As a result, not only can they be quantified, but they can also be analyzed under a microscope.

In some methods, the membrane is folded in test tubes to carry out further analysis. For this reason, the 10 µm thin TRAKETCH® membrane is preferably used.

Description Category Size Type
Traketch Discs program Product information 1.48 MB pdf
Traketch Discs specifications Product information 32.37 kB pdf

Cell culture seals for sterile venting

The TRAKETCH® PET vent membrane has two functions: firstly, to ensure that the air is free of pathogens and secondly, to prevent draining of the cell culture medium. Cell cultures require an adequate supply of fresh air. In so doing, no contaminants may be introduced to the cells from the outside.

cellQART® Cell Culture Inserts

Visit brand website: cellqart.com

With our cellQART® Cell Culture Inserts we are dedicated to resolve the dilemma of customer needs for innovative cell culture products meeting highest standards at affordable prices.

This product portfolio will come with PET membranes in translucent or clear optics and 6-, 12- or 24-Well format which is compatible with most standard Cell Culture Plates. Our standard portfolio includes pore sizes from 0.4 μm to 8.0 μm with various pore densities.

Project based customization (especially alternative membranes, e.g. black colored or further pore sizes) is possible due to 100 % in-house production of plastics & membrane components.

All Inserts are TC treated and gamma sterilized in general as well as RNase / DNase free and non-pyrogenic. With our industry leading quality standards we ensure 100 % membrane parameter consistency for reproducible cell culture results.

Benefits:

  • Affordable prices – buy directly from the true OEM
  • Unique 100 % membrane parameter consistency for reproducible cell culture results
  • Broad standard portfolio and customization – Ensured by complete in-house plastics & membrane production
cellQART® Cell Culture Inserts

Rapid microbial test disposables (Rapid Microbiology)

Using the membrane filter method, a sample is filtered through a TRAKETCH® membrane. All microorganisms in a 100 ml sample solution are concentrated and retained completely (100%) on the membrane surface.

Detection is performed directly on the membrane by adding a fluorescent dye which can only penetrate through intact cell walls (living organisms). To ensure adequate measurement of the emitted fluorescence after stimulation by a laser, the membrane should have a low fluorescence. Otherwise we would see "a white image on a white background", i.e. we would only see a fluorescence of the entire surface.

To avoid this, SABEU stains this membrane in deep black to quench the fluorescence in defined ranges of wavelengths. This entire microbiological detection method is called solid phase cytometry, in which the membrane represents the solid phase. This method is not only rapid, but also in real time, i.e. within just 1–2 hours. In comparison, the growth of microcolonies takes 1–2 days, whereas growing visible colonies takes 1–2 weeks, depending on the microorganism.

Rapid microbial test disposables (Rapid Microbiology)

Degassing vents

Vents consist of hydrophobic and oleophobic membranes, which balance out pressure differences, while at the same time reliably holding back moisture and particles from the outside. Vents protect e.g. sensors in electronic housings or remove the air from oxidizing chemicals in chemical packaging.

Degassing vents

Product development

TRAKETCH® membranes by SABEU are mainly used for the filtration as well as for venting in a number of applications and markets - predominantly in the medical technology, laboratory analysis, bio technology as well as the chemical and pharmaceutical packaging, the automotive and electronics industries.

The properties of ion track membranes (track etch) can be adjusted to match the specific application, and, as a result of the manufacturing process, they are always characterized by a pore structure that is uniform and within close tolerances. The pore sizes can vary from 0.03 µm to 15 µm. 

With TRAKETCH® membranes performance data such as air flow and water pressure can be adjusted in accordance with the requirements of the application within the scope of the technical specifications. The membranes can then be further processed by SABEU, e.g. welded in plastic components.

Product development

Surface finishing

We modify the properties of untreated Track Etched membranes or other polymer membranes by means of different surface treatments, depending on the requirement. Some examples are:

  Hydrophobic and oleophobic for sterile venting
  PVP
  Tissue culture treated (TC)
  Colored membranes: for a reduced autofluorescence
  Sputter coating of gold or other metals
  Further specific modifications upon request

 

Surface finishing

Lamination

For stabilization and optimized handling, all membranes types (e.g. PTFE or Tracketch) can be laminated with different types of non-woven fibers. The heat lamination does not require glue when the fibers are made from poly propylene or PET. The composite material then has a total thickness of 100 µm to 500 µm and can be processed optimally in e.g. automated cutting and welding equipment.

Lamination

Customization

Depending on the application, all membranes can be produced as rolls, sheets, punched round discs or in other outlines and shapes. Further processing into adhesive pads supplied on liners are another option.

  • Roll widths from 8 mm to 300 mm
  • Typical sheet sizes are 8 x 10” (200 x 250 mm)
  • Typical disc diameters are 1/2”(13 mm), 1”(25 mm), 47 mm, 50 mm, 3 ½” (90 mm), 142 mm and 11 ½” (293 mm)
  • Other sizes are available upon request.
Customization

Assembly

For the assembly of membranes, SABEU creates tailor-made production designs based on specifications. They guarantee a high availability and a secure, economic production of the products in clean rooms and controlled areas.

SABEU develops conceptual designs for:​

  Assembly lines
  Rotary systems
  Linear systems
  Automatic testing devices

 

SABEU offers different joining techniques for all membranes:​

  Ultrasonic welding
  Thermal bonding
  Edge over-molding

 

Assembly

TRAKETCH® advantages

Because of the special manufacturing process, TRAKETCH® micro filtration membranes have capillary pores, which – unlike stretched or foamed membranes – have very precise diameters and a smooth surface.

TRAKETCH® Vent are characterized by a hydrophobic and oleophobic surface to achieve ideal venting. The air flow can be adjusted due to precisely defined pores.

TRAKETCH® Bio are ideal as surface filters for any application where cells and particles grow or need to be analyzed on the surface of the membrane, e.g. cell cultures in biotechnology applications as well as particles and microorganisms in environmental analysis.  

TRAKETCH<sup>®</sup> advantages