A Non-ionic Retention System Based on Polyethylene Oxide for Paper Grades Containing Mechanical Pulp and DIP

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Other Title
  • PEOを用いた非イオン性歩留システム
  • PEO オ モチイタ ヒイオンセイ ブドマリ システム

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Investigations were carried out recently in three Canadian newsprint mills where a cationic dual polymer retention chemistry was in use for years. Several enhancer/PEO combinations were evaluated on bench scale to determine any possibility for replacing the existing retention system for reduced chemical cost and improved machine operating efficiency.<BR>The PEO with 10 million molecular weight was more effective than that of 7 million molecular weight. New enhancers produced from bisphenol-S. especially EnhancerB were much superior to the traditional phenol-formaldehyde resin in promoting PEO retention performance. The effect of stock aging on retention appeared to be stock dependent.<BR>The non-ionic retention chemistry improved stock drainage more than the mills cationic dual polymer system even at much lower dosage levels, as determined with a Vertical sludge press. The new enhancer/PEO combination was proved once again to be excellent for pitch removal and was considerably better than that of two cationic dual polymer systems studied.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 55 (9), 1229-1235,028, 2001

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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