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    • 2. 发明申请
    • METHOD AND APPARATUS IN THE SURFACE SIZING OF A PAPER OR BOARD WEB
    • 纸张或纸板表面尺寸的方法和装置
    • WO2004109015A2
    • 2004-12-16
    • PCT/FI2004000345
    • 2004-06-07
    • METSO PAPER INCLIPPONEN JUHAPAKARINEN PEKKAPAKARINEN JUHAHOLOPAINEN KARIVESTOLA JUHANITUOMI ARTO
    • LIPPONEN JUHAPAKARINEN PEKKAPAKARINEN JUHAHOLOPAINEN KARIVESTOLA JUHANITUOMI ARTO
    • D21H17/28D21H21/16D21H23/22D21H23/70D21H25/08
    • D21H23/22D21H17/28D21H21/16D21H23/70D21H25/08
    • The invention relates to a method and an apparatus in the surface sizing of a paper or board web. In the method according to the invention, surface size, such as a starch solution, is applied by means of an applicator device (1) to at least one side of the web (W) to be surface sized, and in which surface sizing is performed per one side of said web (W) in one or more stages. In connection with the application of surface size, a pressure effect is applied to the web (W) by subjecting the web (W) to an underpressure and/or to an overpressure such that, by means of said pressure effect, surface size is forced to penetrate into the web (W) into the pores of the web. Most advantageously, in the pores of the web (W) an underpressure is created that sucks surface size applied to the surface of the web from the surface of the web (W) into the pores in the inner layers. In that connection, surface size is applied to a first side (W1) of the web and a vacuum effect is applied to the opposite side, i.e. a second side (W2), of the web (W) to cause air to flow through the web (W) such that surface size moves from the first side (WI) of the web in the direction of the second side (W2) of the web into the web (W). In a corresponding manner, both sides of the web (W) can be treated in successive stages.
    • 本发明涉及纸或纸板的表面施胶方法和设备。 在根据本发明的方法中,通过施用装置(1)将表面尺寸(例如淀粉溶液)施加到幅材(W)的至少一侧以被表面定尺寸,并且其中表面施胶是 在一个或多个阶段中在所述网(W)的每一侧执行。 与施加表面尺寸相关联,通过使幅材(W)经受负压和/或超压使得幅材(W)施加压力效应,使得通过所述压力效应强制表面尺寸 以将纤维网(W)渗入纤网的孔中。 最有利的是,在幅材(W)的孔中产生负压,其将从幅材(W)的表面施加到幅材表面的表面尺寸吸收到内层中的孔中。 在这方面,表面尺寸被施加到幅材的第一侧(W1),并且真空效应被施加到幅材(W)的相对侧,即第二侧(W2)),以使空气流过 腹板(W),使得表面尺寸从腹板的第一侧(WI)沿着腹板的第二侧(W2)的方向移动到腹板(W)中。 以相应的方式,可以连续处理幅材(W)的两侧。