Preparation method and application method of anti-fake microspheres

Abstract

The invention discloses a preparation method and application method of anti-fake microspheres and relates to a reagent which is added in paper pulp to prevent fake changes. The preparation method adopts a conventional chemical suspension copolymerization method and comprises the following steps: weighting raw materials, namely an anti-fake material, benzoyl peroxide, methyl acrylate and divinylbenzene in a weight ratio of (0.5-1.05):0.5:82.5:17.5, mixing and dissolving in an aqueous solution containing polyvinyl alcohol and sodium dodecyl benzene sulfonate, and performing a synthetic reaction to prepare an anti-fake microsphere product. The application method comprises: when paper-making raw materials are added, the anti-fake microspheres are added in a paper-making dosing tank, and the mixture is stirred evenly to perform the normal paper-making process production and prepare the finished anti-fake paper. In a month, the anti-fake characteristic range of the anti-fake microspheres used in the finished anti-fake paper is 5-100 times of the diameter of the original microspheres, thus the defects that in the existing anti-fake process, the finished product is easy in copying, the cost is high and the environment is polluted can be overcome.

Description

technical field [0001] The technical solution of the present invention relates to the agent for preventing fraudulent alteration added to pulp, specifically the preparation method and application method of anti-counterfeit microspheres. Background technique [0002] With the continuous development of anti-counterfeiting technology, new anti-counterfeiting materials continue to emerge. Due to the extensive use of anti-counterfeiting microspheres in the paper industry, anti-counterfeiting papers with various functions have emerged, such as fluorescent microsphere anti-counterfeiting paper, photochromic microsphere anti-counterfeiting paper, colored microsphere anti-counterfeiting paper and temperature-sensitive color-changing anti-counterfeiting paper; anti-counterfeiting Microspheres are also used in the manufacture of security inks. CN1594732 discloses the preparation and application of polymer resin anti-counterfeiting microspheres, and reports the preparation method of an...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method and application method of anti-counterfeiting microspheres, which is a preparation method and application method of anti-counterfeiting microspheres with extended performance, and overcomes the anti-counterfeiting functional balls or dots of the prior art. It is still easy to be imitated by printing and granulation methods, and the synthesis process and equipment of the anti-counterfeiting resin microspheres and fluorescent anti-counterfeiting point materials are relatively complicated, the cost is high and the yield is low, and a certain amount of environmental pollutants will also be produced.