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    • 2. 发明申请
    • PAPERMAKING PULP AND FLOCCULANT COMPRISING ACIDIC AQUEOUS ALUMINA SOL
    • 包含酸性水性氧化铝溶胶的造纸浆和絮凝剂
    • WO0188265A3
    • 2002-05-23
    • PCT/US0116075
    • 2001-05-17
    • BUCKMAN LABOR INC
    • KARVE MOHAN DCOVARRUBIAS ROSA MDYKSTRA GERALD MMIRZA SALEEM
    • D21H17/00D21H17/29D21H17/37D21H17/42D21H17/44D21H17/67D21H21/10D21H21/52D21H23/10D21H23/76B01D21/01C02F1/52
    • D21H17/675D21H17/005D21H17/29D21H17/375D21H17/42D21H21/52D21H23/765
    • Methods of making paper or paperboard are described. According to one of the methods, an acidic aqueous alumina sol is introduced to a papermaking pulp to form a treated pulp having improved retention properties. The acidic aqueous alumina sol preferably has a pH of from about 3 to about 6. The sol preferably contains elongate secondary particles which are elongated from about 50 nm to about 300 nm in only one plane and formed by edge-to-edge coagulation of rectangular plate like primary particles having a length on one side of from about 10 nm to about 30 nm when observed through an electron microscope. The pulp may also be treated with at least one coagulant, at least one flocculant, at least one cationic starch, at least one cellulytic enzyme, at least one biocide, and/or other conventional papermaking pulp additives. The resulting pulp is formed into a sheet of pulp and then drained to form a paper or paperboard. Other papermaking processes are also described as is a papermaking apparatus for carrying out the methods. Paper and paperboard containing dried pulp that has been treated with an acidic aqueous alumina sol are also described. Methods to flocculate particulate materials in a dispersion are also described.
    • 描述制造纸或纸板的方法。 根据一种方法,将酸性水性氧化铝溶胶引入造纸纸浆中以形成具有改进的保留性能的处理纸浆。 酸性水溶性氧化铝溶胶优选具有约3至约6的pH。该溶胶优选含有细长的二次粒子,其仅在一个平面中从约50nm至约300nm延伸,并且通过矩形的边缘到边缘凝固而形成 当通过电子显微镜观察时,板状的初级粒子的一侧的长度为约10nm至约30nm。 纸浆还可以用至少一种凝结剂,至少一种絮凝剂,至少一种阳离子淀粉,至少一种纤维素分解酶,至少一种杀生物剂和/或其它常规造纸纸浆添加剂进行处理。 所得纸浆形成纸浆,然后排干以形成纸或纸板。 其他造纸方法也被描述为用于实施该方法的造纸装置。 还描述了已经用酸性水溶性氧化铝溶胶处理的含有干纸浆的纸和纸板。 还描述了在分散体中絮凝颗粒材料的方法。
    • 5. 发明申请
    • PAPERMAKING PULP AND FLOCCULANT COMPRISING ACIDIC AQUEOUS ALUMINA SOL
    • 包含酸性水性氧化铝溶胶的造纸浆和絮凝剂
    • WO01088265A2
    • 2001-11-22
    • PCT/US2001/016075
    • 2001-05-17
    • D21H17/00D21H17/29D21H17/37D21H17/42D21H17/44D21H17/67D21H21/10D21H21/52D21H23/10D21H23/76D21H
    • D21H17/675D21H17/005D21H17/29D21H17/375D21H17/42D21H21/52D21H23/765
    • Methods of making paper or paperboard are described. According to one of the methods, an acidic aqueous alumina sol is introduced to a papermaking pulp to form a treated pulp having improved retention properties. The acidic aqueous alumina sol preferably has a pH of from about 3 to about 6. The sol preferably contains elongate secondary particles which are elongated from about 50 nm to about 300 nm in only one plane and formed by edge-to-edge coagulation of rectangular plate like primary particles having a length on one side of from about 10 nm to about 30 nm when observed through an electron microscope. The pulp may also be treated with at least one coagulant, at least one flocculant, at least one cationic starch, at least one cellulytic enzyme, at least one biocide, and/or other conventional papermaking pulp additives. The resulting pulp is formed into a sheet of pulp and then drained to form a paper or paperboard. Other papermaking processes are also described as is a papermaking apparatus for carrying out the methods. Paper and paperboard containing dried pulp that has been treated with an acidic aqueous alumina sol are also described. Methods to flocculate particulate materials in a dispersion are also described.
    • 描述制造纸或纸板的方法。 根据一种方法,将酸性水性氧化铝溶胶引入造纸纸浆中以形成具有改进的保留性能的处理纸浆。 酸性水溶性氧化铝溶胶优选具有约3至约6的pH。该溶胶优选含有细长的二次粒子,其仅在一个平面中从约50nm至约300nm延伸,并且通过矩形的边缘到边缘凝固而形成 当通过电子显微镜观察时,板状的初级粒子的一侧的长度为约10nm至约30nm。 纸浆还可以用至少一种凝结剂,至少一种絮凝剂,至少一种阳离子淀粉,至少一种纤维素分解酶,至少一种杀生物剂和/或其它常规造纸纸浆添加剂进行处理。 所得纸浆形成纸浆,然后排干以形成纸或纸板。 其他造纸方法也被描述为用于实施该方法的造纸装置。 还描述了已经用酸性水溶性氧化铝溶胶处理的含有干纸浆的纸和纸板。 还描述了在分散体中絮凝颗粒材料的方法。
    • 7. 发明申请
    • METHOD FOR IMPROVED WET STRENGTH PAPER
    • 改善湿强度纸的方法
    • WO99045201A1
    • 1999-09-10
    • PCT/US1999/004154
    • 1999-02-25
    • D21H17/03D21H17/07D21H17/09D21H17/54D21H21/20D21H23/10D21H23/76
    • D21H23/10D21H17/07D21H17/09D21H17/54D21H21/20D21H23/765
    • The invention is a method for improving the efficiency of aqueous cationic wet strength additives by pretreating cellulose surfaces with reactive anionic compounds, thus providing the cellulose surface with additional anionic sites suitable for retaining a high proportion of said cationic wet strength additives on the cellulose. The wet strength additives on the cellulose surface are cured or reacted with the cellulose surface. The resulting fibrous material has unusually high wet strength with unusually low doses of cationic wet strength additive. The preferred reactive anionic compounds comprise compounds having a reactive group suitable for covalent bonding to hydroxyl groups on cellulose, and further having sulfonic or other anionic end groups capable of attracting cationic wet strength compounds in aqueous solution. The invention also includes means of preventing photoyellowing of high-yield fibers while simultaneously improving wet strength performance.
    • 本发明是通过用活性阴离子化合物预处理纤维素表面来提高水性阳离子湿强度添加剂的效率的方法,从而为纤维素表面提供了适合于将高比例的所述阳离子湿强度添加剂保留在纤维素上的额外的阴离子位点。 纤维素表面上的湿强度添加剂被固化或与纤维素表面反应。 所得到的纤维材料具有非常高的湿强度,并且具有异常低剂量的阳离子湿强度添加剂。 优选的反应性阴离子化合物包括具有适于与纤维素上的羟基共价连接的反应性基团的化合物,并且还具有能够在水溶液中吸引阳离子湿强度化合物的磺酸或其它阴离子端基的化合物。 本发明还包括防止高产纤维的光胶化同时改善湿强度性能的方法。