Polymer product to improve the retention of hydrophobic internal sizing agents in the manufacture of paper or board

The present invention relates to a method of manufacturing paper or board， and an internal sizing system for providing improved retention of hydrophobic internal sizing agents. The internal sizing system is a hydrophobic internal sizing agent selected from the group consisting of alkenyl succinic anhydride (ASA)， alkyl ketene dimer (AKD)， rosin size and any combination thereof as the first component， and both as the second component. A water-soluble polymer product comprising a sex polyacrylamide， wherein the amphoteric polyacrylamide has a neutral or cationic net charge at pH 7， a weight-average molecular weight of 700，000 to 18，000，000 g/mol， and 4 to With a total ionicity of 28 mol%， the first component and the second component are provided as separate components or as a combination of the first component and the second component. The invention relates a method for a manufacturing paper or board and to an internal sizing system for providing improved retention of hydrophobic internal sizing agents. An internal sizing system comprises a hydrophobic internal sizing agent as a first component selected from the group consisting of alkenyl5 succinic anhydride (ASA)， alkyl ketene dimer (AKD)， rosin sizes and any combination thereof， and a water-soluble polymer product comprising amphoteric polyacrylamide as a second component， which amphoteric polyacrylamide has neutral or cationic net charge at pH 7， a weight-average molecular weight10 of 700 000 – 18 000 000 g/mol and a total ionicity of 4 – 28 mol- %， wherein the first component and the second component are provided as separate components or as a combination of the first component and the second component. The invention relates a method for a manufacturing paper or board and to an internal sizing system for providing improved retention of hydrophobic internal sizing agents. An internal sizing system comprises a hydrophobic internal sizing agent as a first component selected from the group consisting of alkenyl5 succinic anhydride (ASA)， alkyl ketene dimer (AKD)， rosin sizes and any combination thereof， and a water-soluble polymer product comprising amphoteric polyacrylamide as a second component， which amphoteric polyacrylamide has neutral or cationic net charge at pH 7， a weight-average molecular weight10 of 700 000 – 18 000 000 g/mol and a total ionicity of 4 – 28 mol- %， wherein the first component and the second component are provided as separate components or as a combination of the first component and the second component.

本发明涉及造纸或纸板制造方法，以及用于提升疏水内部施胶剂留着率的内部施胶体系。该内部施胶体系以选自烯基琥珀酸酐（alkenyl succinic anhydride, ASA）、烷基烯酮二聚体（alkyl ketene dimer, AKD）、松香胶及其任意组合的疏水内部施胶剂作为第一组分，以包含两性聚丙烯酰胺的水溶性聚合物产品作为第二组分。所述两性聚丙烯酰胺在pH=7时呈中性或阳离子净电荷，重均分子量为700000~18000000 g/mol，总离子度为4~28 mol%。第一组分与第二组分可单独提供，或以二者的组合形式供应。
本发明涉及造纸或纸板制造方法，以及用于提升疏水内部施胶剂留着率的内部施胶体系。该内部施胶体系包含：作为第一组分的疏水内部施胶剂，其选自烯基琥珀酸酐（alkenyl succinic anhydride, ASA）、烷基烯酮二聚体（alkyl ketene dimer, AKD）、松香胶及其任意组合；以及作为第二组分的包含两性聚丙烯酰胺的水溶性聚合物产品。所述两性聚丙烯酰胺在pH=7时呈中性或阳离子净电荷，重均分子量为700000~18000000 g/mol，总离子度为4~28 mol%。其中，第一组分与第二组分可单独提供，或以二者的组合形式供应。
本发明涉及造纸或纸板制造方法，以及用于提升疏水内部施胶剂留着率的内部施胶体系。该内部施胶体系包含：作为第一组分的疏水内部施胶剂，其选自烯基琥珀酸酐（alkenyl succinic anhydride, ASA）、烷基烯酮二聚体（alkyl ketene dimer, AKD）、松香胶及其任意组合；以及作为第二组分的包含两性聚丙烯酰胺的水溶性聚合物产品。所述两性聚丙烯酰胺在pH=7时呈中性或阳离子净电荷，重均分子量为700000~18000000 g/mol，总离子度为4~28 mol%。其中，第一组分与第二组分可单独提供，或以二者的组合形式供应。