• Title/Summary/Keyword: Recycled papers

Search Result 13, Processing Time 0.038 seconds

Analysis of Paper Qualities and Forming Process at Varied Mixing Ratios of Different Kinds of Recovered Paper (이종 폐지 혼합 비율에 따른 종이 품질 및 초지 공정 변화 분석)

  • Choi, Do-Chim;Lee, Kwang Seob;Kim, Chang Keun;Cho, Byoung-Uk;Ryu, Jeong-Yong
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.46 no.3
    • /
    • pp.28-36
    • /
    • 2014
  • The kind and the mixing ratio of recovered papers would affect the quality of final recycled paper. In this study, effects of the mixing ratio of various domestic recycled papers (old news print (ONP), old corrugated container (OCC) and coated paper (CP)) on variations in physical properties of paper and its productivity were investigated. When the mixing ratio of CP grade increased, the freeness (CSF) of recycled pulp was increased while paper strength and white water turbidity was decreased. Paper strength was decreased as the percentage of OCC was higher than ONP. When ONP was mixed with OCC, no adverse effect was observed except the increased drainage resistance. It is expected that these results could be utilized as fundamental data to establish regulations for the recovered paper grades according to mixing ratios of different kinds of them.

Fiber Analysis and Environmental Assessment of Recycled Waste paper for Eco-friendly Corrugated Box Manufacture (친환경 골판지 상자 제조를 위한 재활용 폐지 섬유의 물리적·환경적 특성 평가)

  • Park, Jung-Yoon;Lee, Tai-Ju;Kim, Hyoung-Jin;Kim, Jin-Mu
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.45 no.4
    • /
    • pp.65-74
    • /
    • 2013
  • In the manufacture of corrugated box, the fibrous raw materials are mainly consisted of recycled papers, such as KOCC(Korean Old Corrugated Container), kraft sack, and AOCC(American Old Corrugated Container). Among these recycled waste paper, the proportion of KOCC is relatively higher than others in fibrous raw materials. Generally, KOCC shows some poor fiber properties and contains hazardous heavy metal sources. Therefore, it is to evaluate the property of recycled paper sources for eco-friendly corrugated box manufacture. In this study, the physical and mechanical properties of 3 kinds of recycled fibers and their mixed stocks were analyzed. The environmental assessment was also evaluated by analyzing the 4 representative heavy metal contents and evaporation residues in waste papers. As the results, KOCC showed the poorest fiber qualities and had the highest heavy metal contents and evaporation residues among the recycled fibers. Finally, the mechanical strength properties were increased by decreasing KOCC proportion of mixed stock conditions. In addition, the heavy metal contents and evaporation residues were also decreased by increasing recycled AOCC and kraft sack proportion.

Evaluating Safety of Recycled and Non-recycled Paper-based Box for Food Packaging (식품 포장재로서 재활용 및 비재활용 종이 상자의 안전성 분석)

  • Oh, Jungmin;Shin, So-Hyang;Kwon, Sang-Jo;Cho, Ah Reum;Kim, Sung-Jin;Lee, Yun-Jeong;Jo, Heonjoo;Han, Jaejoon
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.18 no.1_2
    • /
    • pp.27-32
    • /
    • 2012
  • There are many possibilities that recycled papers adulterate contaminants during the process. The objective of this research was to evaluate safety of paper-based packaging materials for food, especially commercial pizza boxes in Korea. Ultimately, we compared recycled and non-recycled commercial paper packaging materials. This study was based on Korean Food and Drug Administration (KFDA) regulation. PCBs were measured by GC-ECD. Arsenic and lead were analyzed using an ICP-MS. Formaldehyde was determined by LC-MS. Fluorescent materials were detected by UV lamp. The result of this study shows that non-recycled paper packaging materials meets all the tested hygienic specifications for food packaging materials, whereas recycled paper-based paperboard box may be contaminated by fluorescent whitening agent. Though these results need to be further studied, it is recommended to avoid using recycled paper in direct contact with food when used in food packaging.

  • PDF