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Preparation method of starch base paper packing adhesive

An adhesive and starch-based technology, applied in the direction of starch-derived adhesives, adhesive types, polymer adhesive additives, etc., can solve the complex mechanism of oxidized starch, poor stability of hydrogen peroxide, and inconvenient transportation and use And other problems, to achieve the effect of not easy to peel, dry quickly, and easy to operate

Inactive Publication Date: 2010-09-22
HUZHOU SIYI STARCH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weak point of this invention is: select potassium permanganate as oxidizing agent, potassium permanganate is a kind of strong oxidizing agent, and the mechanism of its oxidized starch is complex
The weak point of this invention is: select sodium hypochlorite as oxidizing agent for use, and sodium hypochlorite makes oxidizing agent exist unstable quality, easy to decompose strong irritating Cl during light or high temperature. 2 and other defects
The disadvantages of this invention are: hydrogen peroxide is selected as the oxidizing agent, the hydrogen peroxide has the disadvantages of poor stability, many bubbles, low concentration, inconvenient transportation and use, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First add 50 kg of water to the reactor, add 8 kg of urea peroxide under constant stirring, then add 50 kg of wheat starch, stir well, adjust the pH value to 9, add 10 g of nickel sulfate, stir for 40 minutes, let it stand for oxidation After 2 hours, a white, uniform and transparent glue solution was obtained. Continue to stir, add 2 kg of polyacrylamide, 1.2 kg of sodium bentonite, and 1.2 kg of calcium bentonite to the transparent colloid successively, and continue stirring for 40 minutes to obtain the product.

[0032] The viscosity and drying time of the obtained product were tested, and the results are as follows: (1) The viscosity of the obtained product measured by the XND-1 type coating-4 viscometer at 25°C is 30±5 seconds; (2) The drying time of the obtained product Only 20 minutes, and the cardboard is very stiff.

[0033] For verifying the effect that sodium-based bentonite and calcium-based bentonite are used in conjunction, under the constant situation of...

Embodiment 2

[0035] First add 100 kg of water to the reactor, add 10 kg of urea peroxide under continuous stirring, then add 80 kg of wheat starch, stir well, adjust the pH value to 8, add 10 g of nickel sulfate, stir for 20 minutes, and let it stand for oxidation After 1 hour, a white, uniform and transparent glue solution was obtained. Continue to stir, add 0.8 kg of polyacrylamide, 0.8 kg of sodium bentonite, and 0.8 kg of calcium bentonite to the transparent colloid successively, and continue stirring for 30 minutes to obtain the product.

Embodiment 3

[0037] First add 100 kg of water to the reactor, add 40 kg of urea peroxide under constant stirring, then add 120 kg of wheat starch, stir well, adjust the pH value to 10, add 20 g of nickel sulfate, stir for 30 minutes, and let it oxidize After 2 hours, a white, uniform and transparent glue solution was obtained. Continue to stir, add 4.8 kg of polyacrylamide, 3 kg of sodium bentonite, and 3 kg of calcium bentonite to the transparent colloid successively, and continue stirring for 30 minutes to obtain the product.

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PUM

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Abstract

The invention belongs to the technical field of the adhesive, and particularly relates to a preparation method of starch base paper packing adhesive, which comprises the steps of mixing, oxidizing and modifying, wherein the mixing step is: water, Urea hydrogen peroxide and starch are added into a reactor to be uniformly mixed, and the mass ratio of the water, the Urea hydrogen peroxide and the starch is: 10 to 16 parts of water, 1 to 4 parts of Urea hydrogen peroxide and 8 to 12 parts of starch; the oxidizing step is: the pH value is adjusted to 8 to 10, catalyst is added to be mixed for 20 to 40 minutes, and then the mixture is statically held for1 to 2 hours; and the modifying step is: modifier and filler are added to be uniformly mixed. The Urea hydrogen peroxide is used as the oxidant of the starch, so not only the production cost is low, the glue consumption quantity is less, but also the production process is free from utilizing defoamer and is free from peculiar smell, and the environmental protection can be realized.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a preparation method of starch-based paper packaging adhesives. Background technique [0002] Starch adhesive is a kind of adhesive commonly used in my country's packaging industry in recent years. It has high strength, light weight, no corrosion, no pollution, good moisture resistance, strong adhesion, tough coating film, simple production equipment, and easy production. It has the advantages of convenience and small amount of coating, and is an excellent adhesive to replace the natron that has been used for many years. It is widely used in the production of various paper packaging boxes, bags and tubes, and can also be used in the pasting of trademarks and wallpapers, as well as in textile sizing, shoemaking and cotton fabric bonding. However, starch adhesive itself also has some shortcomings, such as slow self-drying speed, low initial adhesion, poor water resistance and so ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/10C09J11/08C09J11/04
Inventor 杨金田杨金耀
Owner HUZHOU SIYI STARCH IND
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