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    • 3. 发明授权
    • Cross-linked pulp sheet
    • 交联纸浆
    • US07288167B2
    • 2007-10-30
    • US11332559
    • 2006-01-13
    • Karl D. SearsMichael E. HaeusslerTina R. Solomon
    • Karl D. SearsMichael E. HaeusslerTina R. Solomon
    • D21H17/15D21H21/22D21H23/02D21H16/20D06M13/192
    • D21C9/005D21H11/20D21H17/37
    • The invention provides a method for preparing cross-linked cellulosic fibers. A sheet of mercerized cellulosic fibers with a purity of at least 95% is treated with a solution containing a carboxylic acid cross-linking agent. The treated cellulosic fibrous material is dried and cured in sheet form to promote intrafiber cross-linking. Cross-linked fiber products produced are economic and possess good porosity, bulking characteristics, wet resiliency, absorption characteristics, low fines, low nits and low knots. The invention also includes blended cellulose compositions comprising a minor proportion of cross-linked mercerized cellulosic fibers and a major proportion of other cellulosic fibers. The invention further provides individualized, chemically cross-linked mercerized cellulosic fibers of high purity.
    • 本发明提供了制备交联纤维素纤维的方法。 用含有羧酸交联剂的溶液处理纯度为至少95%的丝光纤维素纤维片。 经处理的纤维素纤维材料被干燥并以片状固化以促进纤维内交联。 生产的交联纤维产品是经济的,具有良好的孔隙率,膨胀特性,湿回弹性,吸收特性,低细粉,低its和低结。 本发明还包括包含少量交联丝光纤维素纤维和主要比例的其它纤维素纤维的混合纤维素组合物。 本发明进一步提供了高纯度的个体化的,化学交联的丝光纤维素纤维。
    • 7. 发明授权
    • Method for producing a sheet of paper comprising calcite
    • 用于生产包含方解石的纸的方法
    • US07504000B2
    • 2009-03-17
    • US10467461
    • 2002-02-14
    • Christian Richard
    • Christian Richard
    • D21H17/63D21H23/02C01F11/18
    • D21H17/70D21H17/675
    • The invention relates to a method for producing a sheet of paper (6) comprising paper fibres and calcium carbonate mainly in the form of calcite crystals linked directly to the paper fibres. The inventive method is characterised in that it comprises the following steps:—(i) an aqueous composition comprising calcium bicarbonates (5) and/or hydrated and/or dissolved carbon dioxide (3) and (ii) an aqueous composition comprising calcium hydroxide (4) are mixed in an aqueous medium in such a way as to precipitate the calcium carbonate in the form of vaterite crystals;—paper fibres (2, 2′) are immediately added;—the vaterite crystals are left to transform into calcite crystals on contact with the fibres;—said mixture containing the calcite crystals which are fixed to the fibres is subsequently sent on the conveying wire of the papermaking machine (M) for drainage and so that the sheet of paper can be formed;—the sheet of paper (6) thus obtained is treated, if necessary, and dried.
    • 本发明涉及一种用于生产纸张(6)的方法,所述纸(6)包括主要以直接连接到纸纤维的方解石晶体形式的纸纤维和碳酸钙。 本发明的方法的特征在于其包括以下步骤: - (i)包含碳酸氢钙(5)和/或水合和/或溶解的二氧化碳(3)的水性组合物和(ii)包含氢氧化钙 4)在水性介质中以使球状晶体形式的碳酸钙沉淀的方式混合; - 立即加入纸纤维(2,2');将球霰石晶体转变成方解石晶体, 与纤维接触;含有固定在纤维上的方解石晶体的混合物随后送到造纸机(M)的输送线上排出,从而可以形成纸张; - 纸张 (6)如果需要,进行处理并干燥。