Use of a polymer product for deposit formation control in manufacture of paper or board
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United States of America Patent
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Sep 13, 2022
Grant Date -
Sep 30, 2021
app pub date -
Nov 22, 2017
filing date -
Nov 22, 2016
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Abstract
The invention relates to a use of a water-soluble polymer product comprising amphoteric polyacrylamide, which has neutral or cationic net charge at pH 7, a weight-average molecular weight of 2,500,000-18,000,000 g/mol and a total ionicity of 4-28 mol-%. The polymer product is used for controlling deposit formation caused by hydrophobic substances in manufacture of paper or board, where a fibre web is formed from an aqueous suspension of fibres. The invention relates also to a method for controlling deposit formation caused by hydrophobic substances in manufacture of paper or board, where a fibre web is formed from an aqueous suspension of fibres, as well as to produced paper or board.
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