Methods for Improving the Applicability of Wood Powder Spacers to Liner Board Manufacturing

Abstract

The reduction of energy consumption in papermaking process has been considered as one of the major issue in the paper technology. The energy efficiency of paper mill becomes more significant for the mill which manufacture the board grade products such as linerboard with recycled paper such as OCC. The application of lignocellulose spacer to the board grade paper stock would be the feasible solution by increasing the paper bulk and the drying efficiency. The major defects originated from the application of the lignocellulose spacer could be the loss of strength properties. In this study, the ways for improving the strength properties of the spacer-added linerboard were suggested and evaluated. The effects of the addition of various types polyelectrolytes were tested and the different methods of polyelectrolytes were applied for finding the efficient way. The pretreatments of lignocellulose spacer with the polyelectrolytes during wood spacer hydration resulted in the higher strength properties than the typical application method such as the addition to the mixed stock. Multilayer treatments of the spacer with polyelectrolytes were also evaluated and leaded to the higher strength properties with the similar bulk improvement.

Effect of Surface Sizing of Black Liquor on Properties of Corrugated Medium

“…The corrugated material is sandwiched between two liners (Kiviranta 2000). In many cases, the corrugating medium and the test liner (bottom liner) have been generally produced from relatively low quality waste paper (OCC, old corrugated container) to reduce the production cost (Lee et al 2000;Yoon and Sung 2015). This would also decrease strength properties of linerboard.…”