Depth filter sheets

Our depth filter sheets are a three-dimensional depth filter made of adsorbents with an impressively large internal surface area. Think of the adsorbents as a complex network of chambers and channels of different lengths that efficiently trap contaminants. In contrast to conventional screen filtration, the total filtration surface of the depth filter layer increases considerably, which significantly increases the amount of solution filtered.

Filtration mechanism: Triple safety for your processes

Three different types of filtration work together in the filtration process through the depth filter layer. These mechanisms work together to ensure an outstanding result:

1. Mechanical filtration Foreign bodies and particles that are larger than the pores of the filter layer remain mechanically on the surface of the layer and are effectively retained.
2. Electrostatic adsorption This is a weak molecular interaction, known as Van der Waals forces, which occur between the particles in the solution and the material of the filter layer. This also traps smaller particles inside the layer, in the chambers and channels.
3. Electrokinetic adsorption This mechanism is based on the so-called zeta potential. A special modification of the polyelectrolytes gives the filter layer a positive charge. This positive charge ensures that negatively charged dirt particles, microorganisms and viruses in suspension liquids are efficiently captured - even particles that are ten times smaller than the pore size of the filter layer.

Versatile applications and formats

Depth filter sheets are supplied in the formats 20x20, 40x40 and 60x61.4 cm. Based on specific customer requirements, other dimensions are also available, such as round sheets or sheets with special hole patterns.

Your advantages at a glance:

• Maximum filtration surface: The large inner surface of the filter layer enables a higher quantity of filtered solution.
• Multiple filtration mechanisms: mechanical, electrostatic and electrokinetic adsorption work together for the best filtration results.
• Efficient particle binding: Effective detection of particles, microorganisms and viruses, even at the smallest sizes.
• Flexibility: Available in various formats and customizable to your specific requirements on request.

Areas of application:

• Chemical industry
• Food and beverage production
• Pharmaceutical industry
• Water treatment
• Life Science
• Cosmetic products / Cosmetics industry