One press cycle production of fiberboard with unsymmetrically distributed densities

Abstract

With an arrangement of two different densities in a fiberboard according to the newly developed Dascanova Technology a significant amount of raw material could be saved. In this part of the study a production possibility of fiberboard with dual density was investigated. The aim of this research is to produce the highest possible difference between densities formed in one press process. Various methods described by different resin systems, additives, moisture contents and modified raw materials were used for this purpose. The highest difference of 80% between two densities was reached by a combination of more input parameters. These influences and a description of the hardening process during one press cycle are presented in detail in this study. Herstellung von Faserplatten mit asymmetrisch verteilter Plattendichte in einem PressprozessZusammenfassung Mit einer intelligenten Verteilung zweier unterschiedlicher Dichten in einer Faserplatte mittels der neu entwickelten Dascanova Technology konnte ein wesentlicher Teil des Ausgangsmaterials gespart werden. In dieser M. Déneši · T. Joščák ( ) · M. Joščák Dascanova Technology, Doeblinger Hauptstrasse 32/11,

Lightweight tubular fiberboard: Effect of hole diameters and number on panel properties

“…A board with a double density difference between two horizontal layers of fiber mat was obtained in one press cycle at two different moisture content (Haas and Frühwald 2000). By applying a new technology with the commercial description Dascanova Technology, a selective arrangement of the fiberboard density did achieve in one press cycle (Déneši et al 2012).…”

“…Interestingly, research on production and characterization of the tubular/ extruded fiberboard is scarce, although, a patent for the production process of extruded fiberboard date back to 1956 (Bowers et al 1956). It was recently showed that MDF produced with special forming has significantly higher bending properties compared to those panel with conventional forming (Ohba et al 2001, Déneši et al 2012. Hence, developing a cost-efficient lightweight MDF with high rigidity for application in furniture manufacture, building, transport and exhibition construction as well as for direct painting and printing is necessary today.…”