http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
PAM을 이용한 PCC 전처리가 종이 물성에 미치는 영향
원종명(Jong Myoung Won),조병욱(Byoung-Uk Cho),이용규(Yong-Kyu Lee) 한국펄프·종이공학회 2017 펄프.종이기술 Vol.49 No.4
The study on the pretreatment of PCC with PAM (polyacrylamide) was carried out as a part of solving the problem of decreasing the paper strength due to the increase of the filler usage. Anionic PAM was used for pretreatment of PCC, and the average particle size and specific surface area of PCC were measured by PAM dosage. A combination of anionic and cationic PAM was also applied to observe PCC particle size changes. Filler loading experiments were carried out using pretreated PCCs under selected conditions and the changes in paper properties were investigated. The PCC average particle size increased to 103.5 ㎛ as the anionic PAM dosage increased to 0.1%, then decreased, and the specific surface area of PCC showed the opposite. When using anionic and cationic PAM combinations, the average particle size of PCC was determined by the amount of anionic PAM. When PCC pretreated with 0.1% anionic PAM was used as a filler, the bulk, tensile index and burst index increased 3.3%, 4.89%, and 24.2%, respectively, while the ash content was increased by about 5%. Therefore, it is expected that PCC pretreatment using anionic PAM can be used as a useful means for improving paper properties.
도공액의 유동성 및 표면물성 개선에 관한 연구(제3보)
원종명(Jong-Myoung Won),이용규(Yong-Kyu Lee) 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.1
In this study, four kinds of synthetic binders such as SB latex, acrylic binder, vinyl acetate-ethylene (VAE) emulsion copolymer, and eco binder were applied to pre-coating formulation in order to evaluate the influence of the addition ratio of each binder on the properties of coated boards. Five kinds of the SB latex (7 pph) based pre-coating formulations with other synthetic binders (2 pph or 4 pph) were prepared to evaluate their rheological properties of coating colors and properties of coated board. For top-coating, SB latex (12 pph) was only used for the coating formulation in all case. It was shown that high shear viscosity of the pre-coating colors was improved in comparison with that of other coating colors when VAE emulsion binder was applied on the SB latex based pre-coating formulation. In case of printability such as ink set-off and ink trapping, the coated board with eco binder was superior to those of the other coated boards. However, two kinds of SB latex-A and -B used in coating formulation with acrylic and VAE emulsion binder (2 pph) exhibited excellent wet-pick strength of coated board among coating formulations.