Abstract
近年，製紙業界は，輸入木材チップの原料費・輸送費の抑制・パルプ生産性の向上・他分野への応用が重要な課題となっている。最近の輸入木材チップ動向は，植林木の東南アジア産のアカシア材が増加傾向にあり，そのアカシア材が製造工程でトラブルを引き起こす事例が増加している。今回，その事例として，漂白工程でのリン酸カルシウム問題と黒液濃縮工程エバポレータでの木材樹脂汚れ問題を取り上げた。
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