Polyacrylamide-Based Surface Strength Agents Appropriate for Low Basis Weight Paperboard

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  • Sato Shouko
    Paper Chemical Business Division, Seiko PMC, Co., Ltd.

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Other Title
  • 低坪量化に適したPAM系表面紙力剤
  • テイツボリョウカ ニ テキシタ PAMケイ ヒョウメンシリョクザイ

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Abstract

Recently, the production of lower basis weight grades of paperboard is progressing for environmental impact reduction, energy saving, and cost reduction in papermaking industry. Paper strength properties generally tend to decrease as the basis weight is reduced. To compensate paper strength of low basis weight paperboard, dry strength agents are applied. The combination of internal and external application methods is needed to efficiently increase the compressive strength. Preventing buckling and reinforcing interfiber bonding were important factors for improving the compressive strength. The external application could be more effective to prevent buckling.<BR>The simulation of relationship between penetration depth of PAM and bending stiffness of paper was carried out. The optimal penetration depth existed for maximum bending stiffness. To achieve the optimal penetration depth of PAM, molecular design of PAM for external (surface) application was conducted. PAM with the branched structure, high molecular weight, and low viscosity showed the best performance for compressive strength.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 67 (11), 1244-1247, 2013

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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