Environment-friendly starch adhesive for cementing corrugated boards at low temperature and preparation method of environment-friendly starch adhesive

Abstract

The invention relates to an environment-friendly starch adhesive for cementing corrugated boards at a low temperature and a preparation method of the environment-friendly starch adhesive. The starch adhesive is prepared from the following raw materials in parts by weight: 15 to 30 parts of starch, 60 to 80 parts of water, 0.2 to 1 part of sodium hydroxide, 0.05 to 0.2 part of oxidizing agent, 0.1 to 0.5 part of cross-linking agent, 0.1 to 0.5 part of stabilizing agent, 2 to 10 parts of drier, 1 to 5 parts of reinforcing agent and 0.1 to 1 part of penetrating agent. Under the oxidation of the oxidizing agent, besides hydroxyl, groups such as carboxyl and carbonyl are added on molecular chains of the starch, so that the initial adhesion of the adhesive is improved, the cementing quantity is reduced, and the rapidness in drying is facilitated; by adding the penetrating agent, the adhesive can rapidly penetrate through paper and destroy fibers; by adding the cross-linking agent and the reinforcing agent, the adhesive can be instantaneously cross-linked to form a mass structure, the rapid dryness of the adhesive is facilitated, and the adhesive can also be cross-linked with groups on the paper fibers so as to increase the cementing strength and the water resistance of paper boards; and by adding the drier, the drying speed of the starch adhesive can be increased, so that the steam pressure of a paper machine is reduced.

Description

technical field [0001] The invention relates to a starch adhesive, in particular to an environment-friendly starch adhesive for low-temperature lamination of corrugated cardboard and a preparation method thereof. Background technique [0002] At present, most of the adhesives used in the production of corrugated cardboard are starch adhesives, which have a wide range of raw materials and a simple glue-making process. They are basically composed of water, starch, alkali, borax, and stabilizers, which are stirred and reacted in a certain proportion and in a certain order. , but in the actual use process, there are slow drying speed, slow vehicle speed, poor water resistance, and the produced corrugated cardboard is easy to get damp and soft, resulting in a decrease in bond strength and edge pressure strength. Another prominent disadvantage of using ordinary starch adhesives to produce corrugated cardboard is that the required steam pressure is high and the production energy co...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the adhesives used in the production of corrugated cardboard are starch adhesives, which have a wide range of raw materials and a simple glue-making process. They are basically composed of water, starch, alkali, borax, and stabilizers, which are stirred and reacted in a certain proportion and in a certain order. , but in the actual use process, there are slow drying speed, slow vehicle speed, and poor water resistance. The corrugated cardboard produced is easy to get damp and soft, which leads to a decrease in bond strength and edge pressure strength.

Another prominent disadvantage of using ordinary starch adhesives to produce corrugated cardboard is that the required steam pressure is high and the production energy consumption is large. The steam pressure of three-layer boards needs 6-7 kg, and the steam pressure of five-layer boards is as high as 8-9. kg, which runs counter to my country's current energy-saving and emission-reduction policies

[0003] Chinese invention patent CN1438284 discloses a water-resistant starch adhesive for single-sided and corrugated cardboard production lines and its preparation method, which is characterized by water, starch, borax, sodium hydroxide, melamine-formaldehyde resin, phenolic resin, and styrene-acrylic emulsion. Pure acrylic emulsion is stirred and reacted; the adhesive described in this invention has water resistance and moisture resistance, but the drying speed is relatively slow when used, the steam pressure of the paper machine is high, and the energy consumption is large

[0004] Chinese invention patent 201010213557.5 discloses an adhesive for high-strength water-resistant corrugated boxes. The weight ratio of the ingredients in the adhesive is: 15-25 parts of cornstarch, 75-80 parts of water, 0.1-0.4 parts of caustic soda, 0.3-0.6 parts of borax, 0.5-1.2 parts of strengthening agent, the adhesive described in this invention has good water resistance, but the adhesive has poor component compatibility and is easy to delaminate