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    Author(s): Marguerite Sykes; John Klungness; Freya Tan; Said M. Abubakr
    Date: 1998
    Source: 1998 Pulping Conference : October 25-29, 1998, Queen Elizabeth Hotel, Montreal, Quebec, Canada. Atlanta, GA : TAPPI Press, c1998.:p. 539-545.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (119 KB)

    Description

    Brightness, strength, economy, and paper machine runnability are common concerns of pacemakers who use virgin or recycled fiber furnishes. Fiber loadining, a process that precipitates calcium carbonate partially inside the fiber lumen, is a cost-effective technology that could substantially upgrade mechanical pulp furnishes. This study demonstrates the optical and physical handsheet property advantages of fiber loading typical newsprint and thermomechanical pulp (TMP) furnishes. Inclusion of hydrogen peroxide during fiber loading prevented the expected alkaline darkening. Moreover, brief heating of the pulp after complete carbonate conversion resulted in several additional brightness points. Alternative approaches for stabilizing the brightness of fiber-loaded blends of mechanical and deinked pulps are presented. Our comparison of strength and optical properties of handsheets made by these methods suggests that fiber loading can be used to produce paper with high opacity and low basis weight from mechanical pulp.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Sykes, Marguerite.; Klungness, John.; Tan, Freya.; Abubakr, Said M. 1998. Value-added mechanical pulps for light weight, high opacity paper. 1998 Pulping Conference : October 25-29, 1998, Queen Elizabeth Hotel, Montreal, Quebec, Canada. Atlanta, GA : TAPPI Press, c1998.:p. 539-545.

    Keywords

    Mechanical pulping, Paper, Strength, Recycling, Physical properties, Optical properties, Brightness, Papermaking, Fiber loading

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https://www.fs.usda.gov/treesearch/pubs/5948