Previous filter cloths with small pore sizes lead to reduced flow rates and significant pressure loss in the production process. The cloth structure of a newly developed three-dimensional weave increases the number of pores and thus the open surface over the same area. For a given pore size, the flow rate is more than doubled compared to conventional Dutch Weaves. The pore size within a batch can be calibrated as desired from 5 µm to 40 µm.

Conventional woven wire filter cloths can cause turbulences that affect the filtration process at high flow rates. Turbulences with the 3D-filter cloth are effectively avoided. Its pore size can be calculated precisely in advance and adapted to the respective requirements. The mathematical formulae for determining permeability were developed in cooperation with the University of Stuttgart within the scope of AVIF projects A224 and A251, and experimentally validated by glass bead tests and air flow-through measurements.

The precisely predictable pore sizes can achieve extremely high cut-points and dimensional stability. The independent institute Whitehouse Scientific has tested and confirmed these properties. As an additional quality assurance measure, the filter cloth is bubble point tested.

The depth structure of the new woven wire filter cloth facilitates high separation efficiency without rapid blinding. This leads to longer filtration processes between cleaning intervals and longer service life for greater production reliability. The verification of these properties is carried out in collaboration with the “Institute for Mechanical Process Engineering”, IMVT.

The 3D metal filter cloth is woven from standard diameter wires. This has a positive effect on cost. Moreover, it is possible to weave special materials such as Alloy 310 S, Hastelloy C 22, Inconel 600 or titanium even in the small pore range. Thus, for the first time, filter cloth with pore sizes below 40 µm can be manufactured in corrosion- and temperature-resistant alloys.

The specific properties of the 3D filter mesh make it particularly suitable for high end water treatment: Waste water treatment, hydrogen production, drinking water filtration.