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    • 24. 发明公开
    • Process for increasing the solids content of a slurry used in paper manufacturing
    • 在弗吉尼亚州的黎巴嫩宰牲节,
    • EP0521737A1
    • 1993-01-07
    • EP92306190.7
    • 1992-07-06
    • NordCarb Oy Ab
    • Malmström, OlofImppola, Olavi
    • D21H17/67D21H17/68C09D17/00
    • C09D17/004D21H17/00D21H17/675D21H17/68
    • The solids content of precipitated calcium carbonate (PCC) slurry for use in paper manufacturing is increased by addition of a pigment. PCC is used in paper manufacturing both as a filler and as a coating pigment. The low solids content of PCC slurries makes the use of such slurries as a coating material impossible, and increases paper manufacturing costs because of the high transport costs of slurry, additional apparatus need in the paper making machines, great drying needs and therefore, great need of energy, and so on. Powder or granulated pigment and possibly dispersing agents are added to the PCC slurry used in paper manufacturing. The pigment is preferably bolus alba, natural calcium carbonate, talcum, titanium dioxide, or an equivalent. The amount of pigment added to the slurry is such that the desired solids content is obtained.
    • 用于造纸的沉淀碳酸钙(PCC)浆料的固体含量通过添加颜料而增加。 PCC用作造纸作为填料和涂料颜料。 PCC浆料的低固体含量使得使用这种浆料作为涂层材料不可能,并且由于浆料的高运输成本,造纸机中需要额外的设备,需要很大的干燥需求并且因此需要很大的需求,因而增加了纸张制造成本 的能量等等。 将粉末或颗粒状颜料和可能的分散剂加入用于造纸的PCC浆料中。 所述颜料优选为推注阿尔巴,天然碳酸钙,滑石,二氧化钛或等同物。 添加到浆料中的颜料的量使得获得所需的固体含量。