Production manner null of board for liquefied food packing and container for liquefied food

摘要

In a process for increasing the resistance of the cut edges of liquid-packaging board to penetration by hot hydrogen peroxide, an emulsion of an alkyl ketene dimer size, a cationic rosin size, and an insolubilizing agent, are used by adding both sizes and the insolubilizing agent either separately or in preblended form to an aqueous pulp slurry at a neutral to alkaline pH in a machine for producing the liquid-packaging board, before the board is sterilized with a hot aqueous solution of hydrogen peroxide.