SABEU - Plastics and Membrane Technology

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Manufacture of microporous filters

SABEU develops and manufactures its own microporous filters under the TRAKETCH® brand and customizes tracketch 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® filter 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> filter membranes


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 tracketch 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 caps for sterile venting

The TRAKETCH® PET vent filter membrane has two functions: firstl, 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.

Cell culture inserts

The inserts are hanging in the wells of cell culture plates by means of three “arms”. The production is carried out in ISO class 8 clean rooms and the used TRAKETCH® membrane is USP class VI-certified and thus biocompatible.

Cell culture inserts with Track-Etched filter membranes are used for a variety of cell and tissue culture applications. They have a functional, patented design (US 9,139,804 B2) for easy handling when pipetting media into the wells, without the need to remove the cell culture inserts.

Cell culture inserts

Rapid microbial test disposables

Global Life Sciene companies source disposables with colored TRAKETCH membranes for rapid microbial detection from SABEU. They enable users to get useful microbiology results in a matter of hours as opposed to days required for older methods. The users are leading manufacturers in the Pharmaceutical, Home & Beauty, as well as Dairy, Beverage and Food industries.

Rapid microbial test disposables

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


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.



Depending on the application, TRAKETCH and PTFE 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 other options.

  Roll widths from 8 mm to 300 mm
  Typical sheet sizes are 8 x 10” (200 x 250 mm)
  Typical disc diameters are:    13 mm (0.5”) 
                                                        25 mm (1”)
                                                        47 mm 
                                                        50 mm
                                                        90 mm (3.5”) 
                                                      142 mm
                                                      293 mm (11.5”)
  Other sizes are available upon request



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



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

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