원료 및 건조에너지 절감을 위한 경질탄산칼슘의 백판지 공정 적용성 평가

Abstract

In this study, we investigated the applicability of PCC(precipitated calcium carbonate) as a raw materialfor the manufacture of duplex-board. Papers were made with white-ledger stock collected from the actualduplex-board mill and PCC in a laboratory, and paper properties including bulk, ash content, tensilestrength, burst strength, brightness and opacity were measured. The effect of PCC on the drying energyof duplex-board was also determined by measuring the moisture content of wet web and calculating dryingenergy reduction. PCC increased bulk and ISO brightness significantly, which means PCC can decrease the use of virginpulp and recycled fibers. PCC decreased the moisture content of wet web, which means PCC can decreasedrying energy consumption. However, paper strength decreased as addition levels of PCC additionincreased. Therefore, the addition level of PCC must be determined considering the reduction of paperstrengths.