Fine screen and fine screen stack, their use and process for the manufacture of fine screens

DETAILED DESCRIPTION The problem addressed by the invention is the creation of fine screens which combine the good properties of metal fabrics with an improved retention capability, but without leading to significantly greater pressure losses and costs.
The fine screen of coated metal fabric developed for this purpose is essentially characterized by the fact that the metal coating is formed by a galvanic and/or chemical metal deposit which narrows the mesh width.
On such fine screens, the retention property or the fineness of the filter can be controlled by controlling the deposit, and can extend to the vicinity of 0.
01 microns, and establish a defined opening width.
Surprisingly, the pressure loss caused by the narrowing of the meshes is not extraordinarily high, and can be largely compensated or over-compensated by increasing the surface area, specifically by a corrugation or folding of the material, depending on the degree of fineness.
The additional price for the reduction of the mesh width is thereby less than 100%.
The fabric to be coated itself can be made of a non-noble material, whereby the costs of such filters can also be held down.
In addition, a coating with different metals, which are known to be catalysts as explained below, is possible, so that different catalysts can be used, for example, in a confined space.