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Starch-based paperboard adhesive and preparation method thereof

An adhesive and starch technology, applied in the direction of amylose/pullulan adhesives, adhesive types, non-polymer adhesive additives, etc., can solve the unstable performance of adhesives and unstable performance of starch adhesives and other problems, to achieve the effect of reducing glue making steps, improving the reliability and stability of glue making, and reducing weighing errors

Inactive Publication Date: 2017-11-24
成都市九华义远包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the performance of the adhesive prepared by traditionally adding lye twice and adopting the one-step glue making method of stabilizing the viscosity of the adhesive is unstable, and the purpose is to provide a starch-based cardboard adhesive and a preparation method thereof, Solve the problem of unstable performance of starch adhesive prepared by traditional one-step glue method

Method used

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  • Starch-based paperboard adhesive and preparation method thereof

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Effect test

Embodiment 1

[0026] The starch-based cardboard adhesive of the present invention includes starch, a solvent for dissolving starch and preparing starch slurry, lye, and borax, and the lye adjusts the pH value of the starch slurry to 8-9; the starch is composed of amylose, amylopectin Composition of starch, the quality of the amylose accounts for 15% to 28% of the total starch mass, the quality of the amylopectin accounts for 72% to 85% of the total starch mass; the lye is caustic soda with a concentration of 33.3%; The quality of starch accounts for 22%-25% of the total mass of the finished cardboard adhesive, the mass ratio of borax to starch is 0.007-0.012:1.000, and the mass ratio of lye to starch is 0.061-0.071:1.000 .

[0027]Starch includes amylose and amylopectin. During the bonding process, due to the penetrating power of amylose molecules and the gripping force of amylopectin molecules whose shape is like branches, when the starch granules penetrate into the surface paper and Afte...

Embodiment 2

[0032] The quality of the starch accounts for 25% of the finished cardboard adhesive, the mass ratio of the lye to the starch is 0.066:1.000, and the mass ratio of the borax to the starch is 0.010:1.000. The present invention combines the existing glue production amount, glue production time and adhesive parameters to optimize the best ratio, obtain the most cost-effective finished cardboard adhesive, and make the finished cardboard adhesive present a high solid content of 25%, 16 The characteristics of low viscosity within seconds and low gelatinization temperature of 53°C can effectively save energy and improve production efficiency.

Embodiment 3

[0034] The preparation method of starch-based cardboard adhesive comprises the following steps:

[0035] S1. Weighing the starch, dissolving the starch in a solvent at 36-38°C and stirring to prepare a starch slurry;

[0036] S2. Add lye to the starch slurry in step S1, the temperature of the starch slurry is 36-38°C, adjust the pH value of the starch slurry to 8-9 to prepare a weakly alkaline starch slurry, then continue to heat up and stir the starch slurry to The gelatinization temperature of the starch slurry is used to prepare the starch slurry;

[0037] S3. Cool the starch paste obtained in step S2 to 30° C., add borax, and stir to obtain a finished cardboard adhesive.

[0038] The solvent is a water solvent, and the lye is a caustic soda solution with a concentration of 33.3%.

[0039] In the present invention, a slight excess of lye is added at one time, so that the starch slurry is weakly alkaline, and the gelatinization reaction of starch under the action of lye is...

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Abstract

The invention discloses a starch-based paperboard adhesive and a preparation method thereof. The starch-based paperboard adhesive comprises starch, a solvent for dissolving starch and preparing starch slurry, alkali liquor and borax, wherein the alkali liquor is used for regulating the pH value of the starch slurry to be 8-9. The preparation method for the starch-based paperboard adhesive comprises the following steps: preparing the starch slurry; adding the alkali liquor into the starch slurry, wherein the temperature of the starch slurry is 36-38 DEG C; regulating the pH value of the starch slurry to be 8-9, thereby preparing alkalescent starch slurry; increasing the temperature and stirring the starch slurry till reaching the gelatinization temperature of the starch slurry, thereby acquiring the starch paste; reducing the temperature of the starch paste to 30 DEG C and then adding borax and stirring, thereby acquiring an end product of the paperboard adhesive. According to the invention, the step of preparing glue is reduced under the condition that the glue-preparing time is not reduced, the alkali liquor is added at one time, the weighting error is reduced and the glue-preparing reliability and stability are improved.

Description

technical field [0001] The invention relates to a starch adhesive and a preparation method thereof, in particular to a starch-based cardboard adhesive and a preparation method thereof. Background technique [0002] Corrugated cardboard is a multi-layer adhesive body, which consists of at least one layer of corrugated core paper interlayer and one layer of cardboard. It has high mechanical strength and can withstand bumps and falls during handling. The actual performance of a corrugated box depends on three factors: the characteristics of the core paper and paperboard and the structure of the carton itself. The bonding strength of corrugated cardboard is an important index for testing the physical properties of corrugated cardboard. The bonding process of corrugated cardboard includes complex physical and chemical changes, which mainly depend on the quality of starch adhesive. The physical and chemical indicators of starch adhesive include viscosity, pH value, gelatinizatio...

Claims

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Application Information

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IPC IPC(8): C09J103/12C09J11/04
CPCC09J103/12C08K2003/387C08L2205/025C09J11/04C08L3/12C08K3/38C08K3/22
Inventor 张文学魏志理
Owner 成都市九华义远包装有限公司
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