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고충전지 개발을 위한 하이브리드 탄산칼슘 충전제의 이용
최진성,강동석,한정수,서영범 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.6
High filler loading in printing paper enables papermakers to reduce production cost, drying energy, and carbon dioxide emission as long as all the paper essential properties are satisfied. The hybrid calcium carbonate (HCC) was prepared by injecting carbon dioxide to the pre-flocculated mixture of grounded calcium carbonate (GCC) and calcium oxide particles in aqueous medium. HCC made the paper sheet bulkier, stronger, and stiffer than GCC did, but slightly lower in solid contents. Higher wet pressing pressure was applied to the HCC containing sheets in the lab, and it was found that they were still bulkier, stronger, and stiffer, and gave higher solid contents than the GCC though their physical properties were slightly lower than the HCC sheets from original wet pressing pressure case. Comparison of HCC sheet containing 5-10% more fillers to the GCC sheet suggests that there might be possible to increase at least 5% more fillers without loss of physical properties.