A kind of preparation method of quick-drying type carton adhesive

Abstract

The invention discloses a preparation method of a fast drying-type carton binder. The preparation method comprises the following steps of 1, mixing modified starch and water of which the weight is two times that of the modified starch at a room temperature in a slow addition way and stirring the mixture to obtain uniform milky starch slurry, 2, preparing a sodium hydroxide solution having a concentration of 10-12% and slowly adding a part of the sodium hydroxide solution into the starch slurry to obtain pre-gelatinized milky thick starch paste, 3, weighing a composite oxidizing agent of which the weight is 1-1.2% of that of the modified starch, preparing a potassium permanganate solution having a concentration of 4% from the composite oxidizing agent and hot water and adding the potassium permanganate solution into the pre-gelatinized milky thick starch paste, 4, adding the rest of the sodium hydroxide solution into the starch paste and carrying out secondary pasting, 5, dissolving borax in hot water to obtain a solution having a concentration of 10-12% and slowly adding the solution into the starch paste to obtain a glue solution, 6, preparing a sodium thiosulfate solution having a concentration of 4% and slowly adding the sodium thiosulfate solution into the glue solution to obtain an oxidized starch binder, and 7, slowly adding a certain amount of nano-sepiolite powder into the oxidized starch binder with continuous stirring to obtain the fast drying-type carton binder.

Description

technical field [0001] The invention relates to a starch adhesive, in particular to a quick-drying starch adhesive specially used for bonding cartons. Background technique [0002] In the production of paper products, especially corrugated boxes, sodium hydroxide has been mostly used for decades. Because it is highly alkaline and easy to absorb moisture, it often returns to alkali and whitens, causing paper products to deform, peel off, and even corrode products, resulting in huge economic losses such as deterioration and scrapping. Therefore, starch adhesives have been used to replace natron in foreign countries since the 1950s, and starch adhesives have been studied in China since the end of the 1970s, and they were gradually applied to paper production in the 1980s. [0003] There are many disclosures about the formulation and production process of starch adhesives in the prior art, among which there are hundreds of patent technical documents on the website of the State I...

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Problems solved by technology

[0007] The above-mentioned patents have covered most of the starch production technology, but judging from the relevant technical solutions disclosed, there are some shortcomings, either the comprehensive performance of the produced product is poor, or the stability of the process used is poor. , and with the expansion of the market demand for quick-drying starch adhesives, users generally demand a preparation method for quick-drying modified starch adhesives with stable process and good product comprehensive performance