Spraying reinforcing agent used for brightening and reinforcing paper, and preparation method and application thereof

Abstract

The invention discloses a preparation method for apaper brightening and reinforcing emulsion. The method comprises the following steps: S1, mixing water, an emulsifying dispersant and starch to prepare a starch emulsion; S2, adding a viscosity reducer into the starch emulsion under stirring, carrying out heating to 60 to 75 DEG C, and adding an initiator to adjust the pH value of the solution to 5 to 6; S3, adding an aqueous polymer solution, carrying out reacting for 3 to 5 hours, carrying out cooling, and adding a pH adjusting agent to adjust the pH value of the solution to 6 to 8; and S4, adding an anticorrosion stabilizer, wherein the degree of substitution is measured to be 0.03 to 0.06, and a grafted starch emulsion is prepared; i.e., the paper brightening and reinforcing emulsion is prepared. The preparation method for the paper brightening and reinforcing emulsion provided by the invention has the advantages of simple process, extremely short usage flow, exemption of production of harmful by-products and containment of harmful substances like formaldehyde and benzene and reduction of environmental hazards. The paper brightening and reinforcing emulsion of the invention can effectively improve paper tension, enables the paper to be smooth and glossy, can be directly used by mixing with a surface sizing or spraying glue solution when in use, and has the characteristics of simple and convenient use, low wastage rate, etc.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a reinforcing emulsion for paper enhancement and its preparation method and application. Background technique [0002] With the extensive use of secondary fiber raw materials and high-yield pulp in the pulp and paper industry, the surface strength of paper is increasingly dependent on reinforcing additives. Modern printing technology puts forward higher requirements for the comprehensive performance of paper surface. The surface treatment additives used are mainly oxidized starch and styrene acrylic acid (SMA or SAE) polymers. The former has poor strength and poor water resistance; The operating workers and the environment bring pollution and impact, and the finished paper also contains harmful substances. Contents of the invention [0003] In order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provid...

AI Technical Summary

Problems solved by technology

[0002] With the extensive use of secondary fiber raw materials and high-yield pulp in the pulp and paper industry, the surface strength of paper is increasingly dependent on reinforcing additives. Modern printing technology puts forward higher requirements for the comprehensive performance of paper surface. The surface treatment additives used are mainly oxidized starch and styrene acrylic acid (SMA or SAE) polymers. The former has poor strength and poor water resistance; The operating workers and the environment bring pollution and impact, and the finished paper also contains harmful substances

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