The surface size agent composition for the warm water size type paper manufacture and uses this the surface sizing manner

摘要

PURPOSE: To obtain the subject composition containing a specified weight ratio of a ketene dimer-based sizing agent and a water soluble polymer compound and capable of reducing stains of a paper-making apparatus and improving the work efficiency. ;CONSTITUTION: This surface sizing agent composition for paper making in a hot water sizing system is obtained by blending (A) a ketene dimer sizing agent containing a ketene dimer represented by the formula (R₁ and R₂ are each a 8 to 24C alkyl, an alkenyl or an aryl) with (B) a water soluble polymer (e.g. selected from anionic-, cationic-, amphoteric- and nonionic-polymer compounds) in a weight ratio of (A)/(B) of 99.9/0.1 to 0.1/99.9. This sizing agent exhibits excellent sizing properties if applied to paper (e.g. gravure base paper) not requiring application of oxidized starch for improvement of strength of the paper surface or to paperboard.;COPYRIGHT: (C)1995,JPO