Method for preparing ASA paper-making sizing agent emulsion

Abstract

The invention relates to a process for preparing an emulsion of ASA paper sizing agent, comprising the following steps of: (1) mixing and then dispersing inorganic nano-particles with positive charges and inorganic nano-particles with negative charges to form a water phase; (2) mixing oily ASA with the water phase to form an oil-water mixture; and (3) cutting and emulsifying the mixture by a high-speed mixing device to obtain an ASA emulsion. Wherein, the oil-water mixture ratio is 1: 4 to 1:1, particles with negative charges and ASA are in a ratio of 1:30 to 1:5, and particles with positive charges and particles with negative charges are in a ratio of 1:150 to 1:7.5. The preparation process has advantages of simple emulsification process, having no need of surface active agent and complex polyelectrolyte particles for emulsifying the ASA into stable emulsion, low emulsifying agent consumption, low emulsification cost, and high concentration, good stability and high sizing efficiency of the prepared emulsion.

Description

technical field

[0001] The invention relates to a preparation method of an ASA papermaking sizing agent emulsion. In more detail, it is a method for preparing a stable ASA papermaking sizing agent emulsion by using the micro-floccules of anion and cation inorganic nanoparticles as an emulsifying and stabilizing agent. Background technique

[0002] The transformation of the papermaking industry from acidic papermaking system to medium and alkaline papermaking is an innovative change in the papermaking process in the 20th century. This can not only improve the quality of paper and expand the range of fillers, but also reduce pulp consumption, reduce energy consumption, and reduce environmental pollution. Extend the life of equipment. According to statistics, in the early 1980s in Europe, cultural paper produced by medium and alkaline sizing accounted for 60% to 65% of the total cultural paper, and it reached 95% in the 1990s. Alkaline sizing ratio jumped from 15% to over 90%...