Inventors:
William Martin - Charlotte NC, US
Richard Weir - Indian Trail NC, US
Neal Stephenson - Oxford AL, US
Edward Brown - Alexandria AL, US
Douglas Champion - Oxford AL, US
Ronald Stacey - Birmingham AL, US
International Classification:
D21H021/20, D21H021/30, D21H017/33, D21H017/55, D21H017/29, D21H017/71
US Classification:
162158000, 162135000, 162168300, 162175000, 162164100, 162178000, 162179000, 162204000, 162205000, 162162000
Abstract:
In this papermaking process, a first strength agent is added to a stock suspension containing pulp and optionally other additives prior to its being formed into a web at the wet end of a papermaking machine. The web is then formed and processed into paper. A second strength agent is then applied to the surface of the paper. The strength agents may be selected to have opposite charge.