Method for influencing the hydrophobic properties of a fiber web in connection with production of the fiber web and production process for fiber webs and device for application of hydrophobic glue chemical to the fiber web

摘要

The invention relates to a method for influencing the hydrophobic properties of a fiber web (W) in connection with production of the fiber web (W), in which method hydrophobic glue chemical is added to the fiber web (W). The glue chemical for influencing the hydrophobic properties of the fiber web (W) is added, advantageously before coating or other surface treatment of the fiber web, adding the chemical onto at least one surface of the fiber web by spray sizing method. The invention also relates to a production process for fiber webs (W), in which process hydrophobic glue chemical is added to the fiber web and advantageously the hydrophobic glue chemical is added in the process before coating or other surface treatment of the fiber web adding the chemical onto at least one surface of the fiber web by spray sizing device (20).