B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
9/45, 154/69
B32B 13/08 (2006.01) D21H 13/38 (2006.01) D21H 17/35 (2006.01) D21H 17/37 (2006.01) E04C 2/04 (2006.01)
Patent
CA 1192709
ABSTRACT OF THE DISCLOSURE A paper cover sheet material for use in the production of gypsum wallboard, the paper cover sheet material having excellent drainage, porosity and drying properties, and a wallboard product produced therefrom, the paper cover sheet material being produced from fibers comprising a major proportion of cellulose fibers and a minor proportion of mineral fibers, the paper composition additionally comprising a cellulose gel, a latex binder and a flocculating agent, thereby enabling the mineral fibers to be dispersed in an aqueous slurry without materially fracturing the fibers, and retaining the shot present in the mineral fibers without permitting the shot to be released and thereby to contami- nate the papermaking equipment. The excellent porosity, drying properties and drainage of the paper permit the gypsum wallboard formed with the paper to be readily set and dried with reduced heat energy requirements.
426196
Company United States Gypsum
Macrae & Co.
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