Abstract
Papermaking is basically a filtration process. The paper machine wire can be regarded as being a continuous filter on which a proportion of the solids in the stock is retained. The unretained solids drain through the wire along with the majority of the liquid to form the white water. The separation of these two phases, i.e. the drainage process, must be sufficiently advanced when the freshly formed web of paper leaves the wire in order to ensure that no web breaks occur. The rate at which the two phases are separated dictates the rate at which paper can be produced. Drainage rates have a large bearing on the economics of papermaking.
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Horn, D., Linhart, F. (1996). Retention aids. In: Roberts, J.C. (eds) Paper Chemistry. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0605-4_5
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DOI: https://doi.org/10.1007/978-94-011-0605-4_5
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