CN111777973A - Glue for bonding corrugated paper and preparation method thereof - Google Patents
Glue for bonding corrugated paper and preparation method thereof Download PDFInfo
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- CN111777973A CN111777973A CN202010649410.4A CN202010649410A CN111777973A CN 111777973 A CN111777973 A CN 111777973A CN 202010649410 A CN202010649410 A CN 202010649410A CN 111777973 A CN111777973 A CN 111777973A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/08—Ethers
- C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses glue for bonding corrugated paper and a preparation method thereof. The corrugated paper glue comprises modified starch, glutinous rice flour, caustic soda, borax, a reinforcing agent, a drying agent, polyvinyl acetate and water, and the preparation method comprises the following steps: firstly, evenly dividing caustic soda into two parts, adding one part of caustic soda into water to form alkali liquor, heating to mix with polyvinyl acetate, and then sequentially adding a reinforcing agent, a drying agent, the remaining caustic soda and borax to prepare the required corrugated paper glue. The prepared corrugated paper glue has good bonding strength and water resistance.
Description
Technical Field
The application relates to the field of corrugated board manufacturing, in particular to glue for corrugated board bonding and a preparation method thereof.
Background
In the packaging industry, corrugated paper is lighter than wooden boxes, has hardness, is easy to cut in size, protects other packaged products, and is not damaged. It is widely used in the packaging industry.
When the corrugated paper is used, the corrugated base paper needs to be bonded by glue to form a corrugated board, and then the corrugated board is used for packaging other products. At present, the corrugated paper glue is generally made by using starch as a raw material, namely, a starch solution is heated to be gelatinized, and in order to prevent the starch solution from being too viscous and difficult to use a machine for large-scale gluing, caustic soda is required to be added to reduce the crosslinking degree of the starch solution.
However, the existing corrugated paper glue has poor water-resistant effect, when corrugated paper falls into water, the corrugated paper and the glue can be partially scattered in about 5min and the corrugated paper which is well adhered in about 20min can be completely scattered and layered under the condition that the water surface is not stirred. Therefore, a corrugated paper glue with a better water-resistant effect is needed at present.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide the glue for bonding the corrugated paper, which has the advantage of better water-resistant effect.
The second purpose of the invention is to provide a preparation method of the glue for bonding corrugated paper, which is used for preparing the glue for bonding corrugated paper.
In order to achieve the first object, the invention provides the following technical scheme: the glue for bonding the corrugated paper comprises the following components in parts by weight:
50-80 parts of modified starch;
20-45 parts of glutinous rice flour;
10-15 parts of caustic soda;
5-10 parts of borax;
2-5 parts of a reinforcing agent;
1-5 parts of a drying agent;
40-80 parts of polyvinyl acetate;
600-;
the modified starch is prepared by the following method:
s1: dissolving starch in deionized water 2-5 times of the weight of the starch, heating to 35-40 deg.C while stirring, and stirring for 20-30 min;
s2: continuously heating the mixed solution to 45-50 ℃, keeping the temperature for 10-20min, and cooling to room temperature;
s3: adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride accounting for 3-5% of the weight of the starch into the mixed solution, uniformly stirring, performing microwave treatment on the mixed substance for 1-2min, centrifuging and drying to obtain the modified starch.
By adopting the technical scheme, as the modified starch is adopted, the wet method is firstly carried out, the temperature is increased and the stirring is carried out, then the temperature is increased for carrying out secondary gelatinization, the 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride is added for carrying out modification after cooling, so that more branched chains are connected, then the microwave treatment is carried out, the reaction of the 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride and the starch is accelerated, and in addition, the modified starch is more easily connected with the resin. After polyvinyl acetate is added, the water resistance of the glue can be effectively improved, the bonding strength of the glue can be effectively improved, and the reduction of viscosity caused by gelatinization in the modification of starch can be compensated by adding the glutinous rice flour. The caustic soda can effectively reduce the viscosity of the glue, so that the fluidity of the glue is better, the glue is convenient to glue, and the reinforcing agent can effectively improve the bonding strength of the glue. The borax can prolong the quality guarantee period of the glue and prolong the service life of the glue, the drying agent can be mixed with various substances, the bonding speed of the glue can be improved, the production speed is improved, and in addition, the drying agent can also reduce the water consumption and increase the strength of the glue.
Further, the modified starch is prepared by the following method:
s1: dissolving starch in deionized water, wherein the weight of the deionized water is 2.5 times of that of the starch, raising the temperature to 38 ℃, heating while stirring, and stirring for 25 min;
s2: continuing heating the mixed solution to 48 ℃, keeping the temperature for 15min, and cooling to room temperature;
s3: adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride with the weight of 4% of the weight of the starch into the mixed solution, uniformly stirring, performing microwave treatment on the mixed substance for 1.5min, centrifuging and drying to obtain the modified starch.
By adopting the technical scheme, when the modified starch is prepared by adopting the method, the prepared modified starch is easier to mix with other substances in the glue, so that the glue has better mechanical properties.
Further, the weight ratio range of the modified starch to the glutinous rice flour is (2-4): 1.
by adopting the technical scheme, when the weight ratio range of the modified starch to the glutinous rice flour is (2-4): 1, the prepared glue has moderate viscosity and better bonding strength.
Further, the weight ratio of the modified starch to the glutinous rice flour is 2.8: 1.
by adopting the technical scheme, when the weight ratio of the modified starch to the glutinous rice flour is 2.8: 1, the prepared glue has moderate viscosity and better bonding strength.
Further, the weight ratio of the modified starch to the polyvinyl acetate is in the range of 1: (0.8-1.2).
By adopting the technical scheme, when the weight ratio range of the modified starch to the polyvinyl acetate is 1: (0.8-1.2), the prepared glue has moderate viscosity, good bonding strength and good water resistance.
Further, the weight ratio of the modified starch to the polyvinyl acetate is 1: 0.9.
by adopting the technical scheme, when the weight ratio of the modified starch to the polyvinyl acetate is 1: when 0.9, the prepared glue has moderate viscosity, good bonding strength and good water resistance.
Further, the reinforcing agent is kaolin.
Through adopting above-mentioned technical scheme, kaolin can effectively improve the adhesive strength of glue, has certain aridity moreover, combines the drier effectively to reduce the water consumption.
Further, the drying agent is dipropylene glycol methyl ether and ethyl cellulose which are uniformly mixed in a weight ratio of 1: 0.5.
By adopting the technical scheme, the dipropylene glycol methyl ether has a good drying effect, and after the ethyl cellulose is added, the dipropylene glycol methyl ether can have a good connection relation with other substances in the glue, and in addition, the dipropylene glycol methyl ether can be well connected with fibers of the corrugated base paper to strengthen the bonding strength of the glue.
Further, the glutinous rice flour is modified glutinous rice flour, and is prepared by the following method:
s1: soaking the glutinous rice flour in 15% sodium bicarbonate solution for 6-8 h;
s2: separating and drying glutinous rice flour, adding bentonite 2-4 wt% of the glutinous rice flour, stirring, ultrasonic treating for 1-2 hr, and soaking in deionized water for 1-2 days;
s3: adding polyacrylamide accounting for 1-2% of the weight of the glutinous rice flour into the mixed substances, uniformly stirring, raising the temperature to 40-60 ℃, keeping for 1-2h, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
By adopting the technical scheme, when the modified glutinous rice flour is prepared, the modified glutinous rice flour is soaked in a sodium bicarbonate solution to be alkalized, then bentonite is added, ultrasonic treatment is carried out to uniformly mix the modified glutinous rice flour and the sodium bicarbonate solution, then polyacrylamide is added for modification, and the modification speed can be accelerated by raising the temperature. The obtained modified glutinous rice flour can be preferably mixed with starch, and in addition, the obtained modified glutinous rice flour can be preferably mixed with polyvinyl acetate.
Further, the glutinous rice flour is modified glutinous rice flour, and is prepared by the following method:
s1: soaking the glutinous rice flour in a sodium bicarbonate solution with the mass fraction of 12% for 8 hours;
s2: separating and drying glutinous rice flour, adding bentonite, wherein the weight of the bentonite is 3% of the weight of the glutinous rice flour, uniformly stirring, performing ultrasonic treatment for 1.5h, and then adding deionized water to soak for 2 d;
s3: adding polyacrylamide accounting for 1.2% of the glutinous rice flour by weight into the mixed substances, uniformly stirring, raising the temperature to 55 ℃, keeping the temperature for 1.5 hours, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
By adopting the technical scheme, when the glutinous rice flour is modified by adopting the method, the obtained modified glutinous rice flour is easy to combine with other substances in the glue, and the prepared glue has better bonding strength.
Further, the glue for bonding the corrugated paper comprises the following components in parts by weight:
70 parts of modified starch;
25 parts of glutinous rice flour;
12 parts of caustic soda;
8 parts of borax;
3 parts of a reinforcing agent;
3 parts of a drying agent;
63 parts of polyvinyl acetate;
750 parts of water.
By adopting the technical scheme, when the corrugated paper glue prepared by adopting the proportion is adopted, the corrugated paper glue has better bonding strength and better water-resistant effect, and in addition, the prepared glue has better edge pressure strength.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of glue for bonding corrugated paper comprises the following steps:
the method comprises the following steps: dividing caustic soda into two parts, adding one part into water, heating to 80-90 deg.C, adding polyvinyl acetate, maintaining the temperature for 1-2h, reducing the temperature of the solution to 40-60 deg.C, mixing modified starch and glutinous rice flour, adding into the solution, and stirring for 20-30 min;
step two: adding a reinforcing agent into the mixed solution prepared in the step one, and stirring for 2-3 min;
step three: adding a drying agent into the mixed solution prepared in the second step, and stirring for 1-2 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2-3 min;
step five: adding borax into the mixed solution prepared in the fourth step, stirring for 5-10min, and cooling to room temperature to prepare the required glue for bonding corrugated paper.
By adopting the technical scheme, the alkali liquor is prepared firstly, then the polyvinyl acetate is added to be uniformly mixed in the solution, then the modified starch and the glutinous rice flour are added to be gelatinized, the alkali liquor can reduce the gelatinization degree, and the fluidity of the glue is increased. Then sequentially adding the reinforcing agent and the drying agent to uniformly mix, then adding the residual alkali liquor, and adjusting the pH value and the viscosity of the glue. Finally, borax is added, so that the glue has a better quality guarantee period, and the service life is prolonged.
Further, in the first step, the caustic soda is averagely divided into two parts, wherein one part is poured into water, the temperature is raised to 85 ℃, polyvinyl acetate is added, the temperature is kept for 1-2 hours, and the temperature of the solution is reduced to 50 ℃.
By adopting the technical scheme, after the temperature parameters are selected, all substances in the prepared glue are better dispersed, and the glue has better adhesive property and water resistance.
Further, in the fifth step, the borax is added into the mixed solution for 3 times on average, and the adding interval is 0.5-1 min.
By adopting the technical scheme, when the borax is added into the mixed solution for 3 times, the obtained glue can be uniformly mixed in a short time.
Further, the preparation method of the glue for bonding the corrugated paper comprises the following steps:
the method comprises the following steps: dividing caustic soda into two parts, adding one part into water, heating to 85 deg.C, adding polyvinyl acetate, maintaining the temperature for 1.5 hr, reducing the temperature of the solution to 50 deg.C, mixing modified starch and glutinous rice flour, adding into the solution, and stirring for 25 min;
step two: adding a reinforcing agent into the mixed solution prepared in the step one, and stirring for 2.5 min;
step three: adding a drying agent into the mixed solution prepared in the step two, and stirring for 1.5 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2.5 min;
step five: and D, adding borax into the mixed solution prepared in the step four, wherein the borax is added into the mixed solution for 3 times on average, and the adding interval is 1 min. Stirring for 8min totally, and cooling to room temperature to obtain the required glue for bonding corrugated paper.
By adopting the technical scheme, the glue prepared by the method has better bonding strength and water resistance.
In conclusion, the invention has the following beneficial effects:
firstly, due to the addition of the quaternary ammonium salt modified starch, the glutinous rice flour and the polyvinyl acetate, the adhesive strength, the edge pressure strength and the water resistance of the glue can be effectively improved.
Secondly, the modified glutinous rice flour is preferably adopted in the invention, so that the modified starch can be assisted to have better adhesion degree and can be well mixed with other substances in the glue.
Thirdly, the method ensures that the fluidity of the glue is better by adding the caustic soda twice, and ensures that all substances in the glue are mixed more uniformly, so that the glue has better bonding strength, side pressing strength and water resistance.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the following preparation examples and embodiments, the raw materials are all commercially available, wherein the desiccant comprises a desiccant 1 and a desiccant 2, and the desiccant 1 can be dipropylene glycol methyl ether;
the drying agent 2 can be selected from dipropylene glycol methyl ether and ethyl cellulose which are uniformly mixed according to the weight ratio of 1: 0.5.
The reinforcing agent can be kaolin.
Preparation example 1
A modified starch is prepared by the following method:
s1: dissolving 1kg of starch in 2kg of deionized water, raising the temperature to 35 ℃, heating while stirring, and stirring for 30 min;
s2: continuing heating the mixed solution to 50 ℃, keeping the temperature for 10min, and cooling to room temperature;
s3: and adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride accounting for 5 percent of the weight of the starch into the mixed solution, uniformly stirring, carrying out microwave treatment on the mixed substance for 2min, centrifuging and drying to obtain the modified starch.
Preparation example 2
A modified starch is prepared by the following method:
s1: dissolving 1kg of starch in 5kg of deionized water, raising the temperature to 40 ℃, heating while stirring, and stirring for 20 min;
s2: continuing to heat the mixed solution to 45 ℃, keeping the temperature for 20min, and cooling to room temperature;
s3: adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride accounting for 3% of the weight of the starch into the mixed solution, uniformly stirring, carrying out microwave treatment on the mixed substance for 1min, centrifuging and drying to obtain the modified starch.
Preparation example 3
A modified starch is prepared by the following method:
s1: dissolving 1kg of starch in 2.5kg of deionized water, raising the temperature to 38 ℃, heating while stirring, and stirring for 25 min;
s2: continuing heating the mixed solution to 48 ℃, keeping the temperature for 15min, and cooling to room temperature;
s3: adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride with the weight of 4% of the weight of the starch into the mixed solution, uniformly stirring, performing microwave treatment on the mixed substance for 1.5min, centrifuging and drying to obtain the modified starch.
Preparation example 4
A modified glutinous rice flour is prepared by the following steps:
s1: soaking 1kg of glutinous rice flour in 10% sodium bicarbonate solution for 7 h;
s2: separating and drying the glutinous rice flour, adding bentonite, wherein the weight of the bentonite is 4% of the weight of the glutinous rice flour, uniformly stirring, performing ultrasonic treatment for 2 hours, and then adding deionized water to soak for 3 days;
s3: adding polyacrylamide accounting for 1% of the weight of the glutinous rice flour into the mixed substances, uniformly stirring, raising the temperature to 60 ℃, keeping the temperature for 2 hours, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
Preparation example 5
A modified glutinous rice flour is prepared by the following steps:
s1: soaking 1kg of glutinous rice flour in 15% sodium bicarbonate solution for 6 h;
s2: separating and drying the glutinous rice flour, adding bentonite, wherein the weight of the bentonite is 2% of the weight of the glutinous rice flour, uniformly stirring, performing ultrasonic treatment for 1h, and then adding deionized water to soak for 1 d;
s3: adding polyacrylamide accounting for 2% of the weight of the glutinous rice flour into the mixed substances, uniformly stirring, raising the temperature to 40 ℃, keeping the temperature for 1 hour, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
Preparation example 6
A modified glutinous rice flour is prepared by the following steps:
s1: soaking 1kg of glutinous rice flour in 12% sodium bicarbonate solution for 8 h;
s2: separating and drying glutinous rice flour, adding bentonite, wherein the weight of the bentonite is 3% of the weight of the glutinous rice flour, uniformly stirring, performing ultrasonic treatment for 1.5h, and then adding deionized water to soak for 2 d;
s3: adding polyacrylamide accounting for 1.2% of the glutinous rice flour by weight into the mixed substances, uniformly stirring, raising the temperature to 55 ℃, keeping the temperature for 1.5 hours, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
Example 1
The glue for bonding the corrugated paper is prepared by the following method:
the method comprises the following steps: dividing caustic soda shown in table 1 into two parts, wherein one part is poured into water, raising the temperature to 85 ℃, adding polyvinyl acetate, preserving the heat for 1.5h, reducing the temperature of the solution to 50 ℃, uniformly mixing the modified starch and the glutinous rice flour, then pouring the mixture into the solution, and stirring for 25 min;
step two: adding the reinforcing agent with the weight shown in the table 1 into the mixed solution prepared in the step one, and stirring for 2.5 min;
step three: adding a drying agent with the weight shown in the table 1 into the mixed solution prepared in the step two, and stirring for 1.5 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2.5 min;
step five: and adding borax with the weight shown in the table 1 into the mixed solution prepared in the fourth step, wherein the borax is added into the mixed solution for 3 times on average, and the adding interval is 1 min. Stirring for 8min totally, and cooling to room temperature to obtain the required glue for bonding corrugated paper.
Examples 2 to 10
A corrugated paper bonding glue was produced from the raw materials shown in Table 1 by the weight ratios shown in example 1.
Example 11
The glue for bonding the corrugated paper is different from the glue in the embodiment 10 in that in the step one, the temperature of the solution is raised to 80 ℃, polyvinyl acetate is added, the temperature is kept for 1h, the temperature of the solution is lowered to 60 ℃, modified starch and glutinous rice flour are uniformly mixed, then the mixture is poured into the solution, and the stirring is carried out for 30 min;
in the second step, the stirring time is 2 min;
in the third step, the stirring time is 1 min;
in the fourth step, the stirring time is 3 min;
in the fifth step, the borax is added at intervals of 0.5min and stirred for 10 min.
Example 12
The glue for bonding the corrugated paper is different from the glue in the embodiment 10 in that in the step one, the temperature of the solution is raised to 90 ℃, polyvinyl acetate is added, the temperature is kept for 2 hours, the temperature of the solution is lowered to 40 ℃, modified starch and glutinous rice flour are uniformly mixed, then the mixture is poured into the solution, and the stirring is carried out for 20 minutes;
in the second step, the stirring time is 3 min;
in the third step, the stirring time is 2 min;
in the fourth step, the stirring time is 2 min;
in the fifth step, the borax is added at intervals of 0.8min and stirred for 8 min.
Comparative example 1
A glue is prepared by the following method:
the method comprises the following steps: evenly dividing the caustic soda with the weight shown in the table 2 into two parts, raising the temperature of the solution to 50 ℃, pouring the starch into the solution, and stirring for 25 min;
step two: adding the reinforcing agent with the weight shown in the table 2 into the mixed solution prepared in the step one, and stirring for 2.5 min;
step three: adding a drying agent with the weight shown in the table 2 into the mixed solution prepared in the step two, and stirring for 1.5 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2.5 min;
step five: and adding borax with the weight shown in the table 2 into the mixed solution prepared in the fourth step, wherein the borax is added into the mixed solution for 3 times on average, and the adding interval is 1 min. Stirring for 8min totally, and cooling to room temperature to obtain the required glue.
Comparative example 2
A glue differing from comparative example 1 in that the modified starch prepared in preparation example 3 was used.
Comparative example 3
A glue is prepared by the following method:
the method comprises the following steps: dividing caustic soda with the weight shown in table 2 into two parts, pouring one part into water, raising the temperature to 85 ℃, adding polyvinyl acetate, preserving the heat for 1.5h, reducing the temperature of the solution to 50 ℃, pouring modified starch into the solution, and stirring for 25 min;
step two: adding the reinforcing agent with the weight shown in the table 2 into the mixed solution prepared in the step one, and stirring for 2.5 min;
step three: adding a drying agent with the weight shown in the table 2 into the mixed solution prepared in the step two, and stirring for 1.5 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2.5 min;
step five: and adding borax with the weight shown in the table 2 into the mixed solution prepared in the fourth step, wherein the borax is added into the mixed solution for 3 times on average, and the adding interval is 1 min. Stirring for 8min totally, and cooling to room temperature to obtain the required glue.
Comparative example 4
A glue is prepared by the following method:
the method comprises the following steps: evenly dividing the caustic soda with the weight shown in the table 2 into two parts, pouring one part into water, raising the temperature of the solution to 50 ℃, uniformly mixing the modified starch and the glutinous rice flour, then pouring into the solution, and stirring for 25 min;
step two: adding the reinforcing agent with the weight shown in the table 2 into the mixed solution prepared in the step one, and stirring for 2.5 min;
step three: adding a drying agent with the weight shown in the table 2 into the mixed solution prepared in the step two, and stirring for 1.5 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2.5 min;
step five: and adding borax with the weight shown in the table 2 into the mixed solution prepared in the fourth step, wherein the borax is added into the mixed solution for 3 times on average, and the adding interval is 1 min. Stirring for 8min totally, and cooling to room temperature to obtain the required glue.
Comparative example 5
A glue which differs from example 10 in that the starch added is a commercially available starch, i.e. unmodified starch.
Comparative examples 6 to 7
A glue differing from example 10 in that the weight of the raw materials is as shown in table 2.
Comparative example 8
A glue is prepared by the following method:
the weight of each raw material was the same as in example 10.
Mixing modified starch, glutinous rice flour and polyvinyl acetate, adding water, adding caustic soda, raising the temperature of the solution to 85 ℃, preserving heat for 1.5 hours, sequentially adding a reinforcing agent, a drying agent and borax into the solution, stirring for 10min, uniformly stirring, and cooling to room temperature to obtain the required glue.
TABLE 1
TABLE 2
Performance test
1. Adhesive strength test: the glues obtained in examples 1 to 12 and comparative examples 1 to 8 were subjected to adhesion strength tests in the manner described in GB/T6541-2011.
2. Testing the edge pressure strength: the glues obtained in examples 1 to 12 and comparative examples 1 to 8 were subjected to an edge crush strength test in the manner described in GB/T6541-2011.
3. And (3) testing water resistance: the glues obtained in examples 1 to 12 and comparative examples 1 to 8 were coated at a ratio of 90g/m, respectively2The glue coating amount of the corrugated base paper is 5g/m2And pasting the other corrugated base paper, drying, putting the pasted corrugated board into water at 25 ℃, timing, and stopping timing when the corrugated base paper is separated.
The test results are shown in table 3.
TABLE 3
As can be seen from table 3, in examples 1 to 12, the corrugated board glues obtained by the method described in example 10 were good in both adhesive strength and edge crush strength, and also good in water resistance.
Compared with the example 10, the modified starch prepared in the preparation example 3 and the modified glutinous rice flour prepared in the preparation example 6 are adopted in the examples 1 to 4, so that the corrugated paper glue is better in both the bonding strength and the edge crush strength and is better in water resistance.
Compared with the embodiment 10, the drying agent is a mixture of dipropylene glycol methyl ether and ethyl cellulose, and the dipropylene glycol methyl ether and the ethyl cellulose are uniformly mixed according to the weight ratio of 1:0.5, so that compared with the common drying agent dipropylene glycol methyl ether, the drying agent dipropylene glycol methyl ether can be well connected with other substances in the glue due to the fact that the ethyl cellulose is dissolved in the drying agent dipropylene glycol methyl ether, and can also be well connected with fibers of the corrugated base paper to strengthen the bonding strength of the glue.
Examples 6-9 compare example 10, which illustrates that when the weight ratio of modified starch to polyvinyl acetate is in the range of 1: (0.8-1.2), and the weight ratio range of the modified starch to the glutinous rice flour is (2-4): 1, the prepared glue has good bonding strength and edge pressure strength, and good water resistance.
Examples 11-12 compare with example 10, showing that when the parameters in each step were selected from those of example 10, the adhesive strength and edge crush strength of the glue were better, and the water resistance was better.
As can be seen from Table 3, in comparative example 1, compared with examples 1-12, the adhesive strength and the edge pressure strength of the glue prepared by using the modified starch, the glutinous rice flour and the polyvinyl acetate are better and the water resistance is better than those of the glue prepared by only adding the commercially available common starch.
As can be seen from Table 3, in comparative example 2, compared with examples 1-12, the adhesive strength and the edge pressure strength of the glue prepared by adding the glutinous rice flour and the polyvinyl acetate are better, and the water resistance is better.
As can be seen from table 3, in comparative example 3, compared with examples 1 to 12, the adhesive strength and the edge pressure strength of the glue can be enhanced after the glutinous rice flour is added, which indicates that the glutinous rice flour can be well crosslinked with other substances in the glue when being added into the glue, and the glutinous rice flour and the glue are uniformly mixed.
As can be seen from Table 3, in comparative example 4, compared with examples 1 to 12, the water resistance of the glue can be effectively improved by adding polyvinyl acetate, and the adhesive strength and the edge pressure strength of the glue can be improved.
As can be seen from Table 3, in comparative example 5, compared with examples 1 to 12, the addition of the modified starch can effectively improve the adhesive strength, the edge pressure strength and the water resistance of the glue, which indicates that the modified starch has better gelatinization effect during gelatinization, and the modified starch can be easily mixed with other substances in the glue.
As can be seen from Table 3, in comparative examples 6 and 7, compared with examples 1 to 12, when the amount of polyvinyl acetate added was too large, the polyvinyl acetate was agglomerated and was not easily mixed with other substances in the glue uniformly, and when the amount of polyvinyl acetate added was too small, the adhesive strength of the glue was insufficient and the water resistance was inferior.
As can be seen from Table 3, in comparison with examples 1-12, in the case of comparative example 8, when the glue is prepared, the alkali solution is prepared first, then the polyvinyl acetate is added to be uniformly mixed in the alkali solution, and then the starch is gelatinized, so that the obtained glue has better adhesive strength and more uniform distribution of the substances.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a glue for corrugated paper bonding which characterized in that: the paint comprises the following components in parts by weight:
50-80 parts of modified starch;
20-45 parts of glutinous rice flour;
10-15 parts of caustic soda;
5-10 parts of borax;
2-5 parts of a reinforcing agent;
1-5 parts of a drying agent;
40-80 parts of polyvinyl acetate;
600-;
the modified starch is prepared by the following method:
s1: dissolving starch in deionized water 2-5 times of the weight of the starch, heating to 35-40 deg.C while stirring, and stirring for 20-30 min;
s2: continuously heating the mixed solution to 45-50 ℃, keeping the temperature for 10-20min, and cooling to room temperature;
s3: adding 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride accounting for 3-5% of the weight of the starch into the mixed solution, uniformly stirring, performing microwave treatment on the mixed substance for 1-2min, centrifuging and drying to obtain the modified starch.
2. The glue for bonding corrugated paper as claimed in claim 1, wherein: the weight ratio range of the modified starch to the glutinous rice flour is (2-4): 1.
3. the glue for bonding corrugated paper as claimed in claim 1, wherein: the weight ratio range of the modified starch to the polyvinyl acetate is 1: (0.8-1.2).
4. The glue for bonding corrugated paper as claimed in claim 1, wherein: the reinforcing agent is kaolin.
5. The glue for bonding corrugated paper as claimed in claim 1, wherein: the drying agent is dipropylene glycol methyl ether and ethyl cellulose which are uniformly mixed according to the weight ratio of 1: 0.5.
6. The glue for bonding corrugated paper as claimed in claim 1, wherein: the glutinous rice flour is modified glutinous rice flour and is prepared by the following method:
s1: soaking the glutinous rice flour in 10-15% by mass of sodium bicarbonate solution for 6-8 h;
s2: separating and drying glutinous rice flour, adding bentonite 2-4 wt% of the glutinous rice flour, stirring, ultrasonic treating for 1-2 hr, and soaking in deionized water for 1-3 d;
s3: adding polyacrylamide accounting for 1-2% of the weight of the glutinous rice flour into the mixed substances, uniformly stirring, raising the temperature to 40-60 ℃, keeping for 1-2h, cooling to room temperature, separating and drying to obtain the required modified glutinous rice flour.
7. The glue for bonding corrugated paper as claimed in claim 1, wherein: the paint comprises the following components in parts by weight:
70 parts of modified starch;
25 parts of glutinous rice flour;
12 parts of caustic soda;
8 parts of borax;
3 parts of a reinforcing agent;
3 parts of a drying agent;
63 parts of polyvinyl acetate;
750 parts of water.
8. The preparation method of the glue for bonding corrugated paper as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
the method comprises the following steps: dividing caustic soda into two parts, adding one part into water, heating to 80-90 deg.C, adding polyvinyl acetate, maintaining the temperature for 1-2h, reducing the temperature of the solution to 40-60 deg.C, mixing modified starch and glutinous rice flour, adding into the solution, and stirring for 20-30 min;
step two: adding a reinforcing agent into the mixed solution prepared in the step one, and stirring for 2-3 min;
step three: adding a drying agent into the mixed solution prepared in the second step, and stirring for 1-2 min;
step four: adding the remaining caustic soda into the mixed solution prepared in the third step, and stirring for 2-3 min;
step five: adding borax into the mixed solution prepared in the fourth step, stirring for 5-10min, and cooling to room temperature to prepare the required glue for bonding corrugated paper.
9. The preparation method of the glue for bonding corrugated paper according to claim 8, wherein the preparation method comprises the following steps: in the first step, the caustic soda is averagely divided into two parts, wherein one part is poured into water, the temperature is raised to 85 ℃, polyvinyl acetate is added, the temperature is kept for 1-2 hours, and the temperature of the solution is reduced to 50 ℃.
10. The preparation method of the glue for bonding corrugated paper according to claim 8, wherein the preparation method comprises the following steps: in the fifth step, the borax is averagely added into the mixed solution for 3 times, and the adding interval is 0.5-1 min.
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| CN202010649410.4A CN111777973A (en) | 2020-07-08 | 2020-07-08 | Glue for bonding corrugated paper and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708375A (en) * | 2020-12-05 | 2021-04-27 | 东莞顺诚纸品有限公司 | Glue and preparation method and corrugated paper prepared by applying glue |
| CN115044327A (en) * | 2022-06-30 | 2022-09-13 | 中建材创新科技研究院有限公司 | Low-cost adhesive for universal plate roll coating process suitable for winter and application thereof |
| CN116239977A (en) * | 2023-05-12 | 2023-06-09 | 山东阳光概念包装有限公司 | Quick-drying adhesive for corrugated case and preparation method thereof |
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| CN104119455A (en) * | 2014-07-14 | 2014-10-29 | 金东纸业（江苏）股份有限公司 | Cation modified starch, preparation method and applications thereof |
| CN106009707A (en) * | 2016-06-24 | 2016-10-12 | 佛山市合璟节能环保科技股份有限公司 | Biomass additive for board adhesive as well as preparation method and application thereof |
| CN109456707A (en) * | 2018-12-03 | 2019-03-12 | 太仓适度纸业包装有限公司 | A kind of adhesive for corrugated board bonding |
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| JPS5789946A (en) * | 1980-11-26 | 1982-06-04 | Honshu Paper Co Ltd | Manufacture of corrugated cardboard |
| CN104119455A (en) * | 2014-07-14 | 2014-10-29 | 金东纸业（江苏）股份有限公司 | Cation modified starch, preparation method and applications thereof |
| CN106009707A (en) * | 2016-06-24 | 2016-10-12 | 佛山市合璟节能环保科技股份有限公司 | Biomass additive for board adhesive as well as preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708375A (en) * | 2020-12-05 | 2021-04-27 | 东莞顺诚纸品有限公司 | Glue and preparation method and corrugated paper prepared by applying glue |
| CN115044327A (en) * | 2022-06-30 | 2022-09-13 | 中建材创新科技研究院有限公司 | Low-cost adhesive for universal plate roll coating process suitable for winter and application thereof |
| CN115044327B (en) * | 2022-06-30 | 2024-03-19 | 中建材创新科技研究院有限公司 | Universal plate roll coating process adhesive with low cost and suitable for winter use and application thereof |
| CN116239977A (en) * | 2023-05-12 | 2023-06-09 | 山东阳光概念包装有限公司 | Quick-drying adhesive for corrugated case and preparation method thereof |
| CN116239977B (en) * | 2023-05-12 | 2023-08-11 | 山东阳光概念包装有限公司 | Quick-drying adhesive for corrugated case and preparation method thereof |
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Application publication date: 20201016 |