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Glue for producing corrugated cardboard at constant pressure and low temperature and preparation process thereof

A corrugated cardboard and preparation technology, applied in the direction of adhesive type, adhesive additive, non-polymer adhesive additive, etc., can solve problems such as poor working environment, paper shrinkage and warping, and reduced machine precision. Achieve the effects of energy saving and starch consumption, good stability and coagulation, and improvement of viscosity and stability

Inactive Publication Date: 2018-11-16
刘时侨
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gelatinization temperature of starch is usually too high, which will bring many inconveniences.
First of all, when the glue encounters high temperature at the moment of bonding, the surface of the glue solidifies first, forming a film-like protective layer that locks the moisture in the glue, making it difficult for the moisture in the glue to penetrate into the paper fiber effectively, resulting in false Second, the paper fibers will shrink and twist due to high temperature, making it difficult to maintain the original physical properties of the paper. Due to the different expansion coefficients of various papers after absorbing glue, it is easy to cause the paper to shrink and warp. It causes shrinkage during the heat setting process; thirdly, the high temperature consumes a lot of mechanical equipment, reduces the precision of the machine, and causes problems such as unstable production; finally, the production temperature is too high, which makes the working environment of workers not good, which is not conducive to high-speed production of workers
Zhou Youming proposed the use of polyvinyl alcohol (PVA) as a modifier to prepare corn for the production of corrugated cardboard in the production line in "Research and Development of PVA Modified Starch Glue for Corrugated Cardboard" (Chemistry and Adhesion, No. 3, 1998). Starch adhesives have achieved good results, but the relative cost of polyvinyl alcohol is relatively high, and the process is not easy to control in practical applications
[0004] In summary, the traditional high-temperature and high-pressure glue paste has many defects such as poor adhesion, easy shrinkage of paper, large equipment loss, and poor working environment. The existing technology still lacks a glue that can be applied to the production of constant-pressure and low-temperature corrugated cardboard.

Method used

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  • Glue for producing corrugated cardboard at constant pressure and low temperature and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0029] (1) To prepare cooked pulp, add 1300kg of water to the mixing tank, start stirring and add 400kg of tapioca starch, first add 20kg of lye, add 10kg of lye after 8 minutes, add 5kg of lye after 5 minutes, and add 2kg of lye after 3 minutes Liquid, take a sample, measure the viscosity value, the viscosity value of the slurry is less than 28 seconds, add 0.5kg lye after 2 minutes, take the second sample, measure the viscosity, the viscosity value of the slurry cannot reach 28 seconds, after 2 minutes Add 0.5kg lye for the second time, continue sampling, when the viscosity value of slurry is 28 seconds, stop adding lye, starch is fully ripened under the effect of sodium hydroxide;

[0030] (2) Mixing preparation, with the cooked pulp prepared in step (1), under the situation of continuous stirring, add borax 4kg, add polytetrafluoroethylene 1.5kg after 5 minutes, add 1kg dibutyltin dilaurate and 2.5kg after 4 minutes kg anhydrous calcium chloride, keep stirring for 5-10 min...

preparation Embodiment 2

[0033] (1) To prepare cooked pulp, add 1300kg of water to the mixing tank, start stirring and add 400kg of tapioca starch, first add 20kg of lye, add 10kg of lye after 8 minutes, add 5kg of lye after 5 minutes, and add 2kg of lye after 3 minutes Liquid, take a sample, measure the viscosity value, the viscosity value of the slurry is less than 28 seconds, add 0.5kg lye after 2 minutes, take the second sample, measure the viscosity, the viscosity value of the slurry cannot reach 28 seconds, after 2 minutes Add 0.5kg lye for the second time, continue sampling, when the viscosity value of slurry is 28 seconds, stop adding lye, starch is fully ripened under the effect of sodium hydroxide;

[0034] (2) Mixing preparation, with the cooked slurry prepared in step (1), under the situation of continuous stirring, add borax 4kg, add polytetrafluoroethylene 1.5kg and sodium bentonite 1.5kg after 5 minutes, add 3kg borax after 4 minutes Dibutyltin laurate and 2.5kg anhydrous calcium chlori...

preparation Embodiment 3

[0037] (1) To prepare cooked pulp, add 1300kg of water to the mixing tank, start stirring and add 380kg of tapioca starch, first add 20kg of lye, add 10kg of lye after 8 minutes, add 5kg of lye after 5 minutes, and add 2kg of lye after 3 minutes Liquid, take a sample, measure the viscosity value, the viscosity value of the slurry is less than 28 seconds, add 0.5kg lye after 2 minutes, take the second sample, measure the viscosity, the viscosity value of the slurry cannot reach 28 seconds, after 2 minutes Add 0.5kg lye for the second time, continue sampling, when the viscosity value of slurry is 28 seconds, stop adding lye, starch is fully ripened under the effect of sodium hydroxide;

[0038] (2) Mixing preparation, with the cooked slurry prepared in step (1), under the situation of continuous stirring, add borax 4kg, add polytetrafluoroethylene 1.5kg and sodium bentonite 1.5kg after 5 minutes, add 3kg borax after 4 minutes Dibutyltin laurate and 2.5kg anhydrous calcium chlori...

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Abstract

The invention discloses a glue for producing corrugated cardboard at constant pressure and low temperature and a preparation process thereof. The glue provided by the invention comprises the followingraw materials in parts by weight: 300-500 parts of cassava starch, 30-40 parts of copiesalkali solution, 1-8 parts of anhydrous calcium chloride , 1000-1500 parts of water, 2-5 parts of borax, 0.1-2parts of additives and 1-5 parts of a stabilizer. By adding the anhydrous calcium chloride, the invention promotes the starch adhesive, reduces the solubility of starch macromolecule and the gelatinization temperature of the glue, and greatly improves the viscosity and the stability of the glue. The glue preparation process provided by the invention controls the temperature of the reaction systembelow 26 DEG C, and the lower the water temperature is, the lower the gelatinization temperature of the obtained starch glue is. Adopting the glue provided by the invention to produce the corrugated cardboard, the cardboard has good adhesion, is not easy to deform at high temperature, reduces the loss of equipment, saves energy and starch consumption, and optimizes the working environment of workers.

Description

technical field [0001] The invention relates to the technical field of corrugated cardboard glue, in particular to a constant-pressure low-temperature corrugated cardboard glue and a preparation process thereof. Background technique [0002] Corrugated cardboard, also known as corrugated cardboard, is made of at least one layer of corrugated paper and one layer of cardboard paper. It has good elasticity and extensibility. It is mainly used to make cartons, the sandwich of cartons and other packaging materials for fragile goods. Starch glue is widely used in the corrugated paper industry at home and abroad for its advantages of low price, simple glue making process, fast drying speed, and ability to adapt to high-speed production requirements. However, the original starch glue has the following problems, the glue is prone to precipitation during use, easy to mildew and damage during high temperature, and the adhesive performance is not high. The above reasons lead to the was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/02C09J11/08C09J11/04
CPCC09J103/02C08K2003/162C08K2003/387C09J11/04C09J11/08C08L27/18C08K3/16C08K3/38
Inventor 刘时侨
Owner 刘时侨
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