Method and equipment for controlling properties of paper
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United States of America Patent
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Nov 20, 2001
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N/A
app pub date -
Nov 17, 1998
filing date -
Nov 25, 1997
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Abstract
The invention relates to a method and equipment for controlling properties of paper, which method comprises modelling the effect of the flow of retention agent (F.sub.ra) both on the amount of filler in the white water and on the paper ash content (ASH), and the effect of the flow of filler (F.sub.fi) both on the paper ash content (ASH) and on the amount of filler in the white water. The fulfilled modelling is used to adjust the amount of filler in the white water and the paper ash content (ASH) by controlling simultaneously the flow of retention agent (F.sub.ra) and the flow of filler (F.sub.fi).
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