PROCESS FOR SIZING PAPER

The present invention refers to a process for sizing paper which comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, (i) a sizing dispersion comprising a sizing agent and a polymer having one or more aromatic groups, and (ii) a sizing promoter comprising a p...

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1. Verfasser: MAGNUSSON, BARBRO
Format: Patent
Sprache:eng ; spa
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Beschreibung
Zusammenfassung:The present invention refers to a process for sizing paper which comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, (i) a sizing dispersion comprising a sizing agent and a polymer having one or more aromatic groups, and (ii) a sizing promoter comprising a polymer having one or more aromatic groups, forming and draining the obtained suspension, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension. La presente invencion se refiere a un proceso para aprestar papel, que comprende agregar a una suspension acuosa que contiene fibras celulosicas y rellenos o cargas opcionales: (i) una dispersion de apresto que comprende un agente de apresto y un polimero que tiene uno o mas grupos aromaticos, y (ii) un promotor de apresto que comprende un polimero que tiene uno o mas grupos aromaticos, formar y drenar la suspension obtenida, en donde la dispersion de apresto y el promotor de apresto se agregan por separado a la suspension acuosa.