On-line Porosity Analyzer

Permi is a new on-line paper quality analyzer, designed for monitoring grades where porosity is a critical variable. These grades include: sack, cigarette, filter, MG-kraft, bank note, photo, SC, LWC base, saturating, tissue and copy papers. On-line measurement ensures uniform porosity and gives feed back to refining control thus enabling to save energy.

Permi provides continuous and immediate feedback on quality and changes of porosity. The measurement time is one millisecond (1 ms) with even low porous papers. The on-line measurement principle is equivalent to standard laboratory measuring methods. This is accomplished by varying the measuring pressure and surface area in accordance with laboratory method. Most common methods available like Bendtsen, Gurley, Coresta, Bekk etc