CN110305604B - Adhesive for corrugated board and preparation method thereof - Google Patents
Adhesive for corrugated board and preparation method thereof Download PDFInfo
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- CN110305604B CN110305604B CN201910591634.1A CN201910591634A CN110305604B CN 110305604 B CN110305604 B CN 110305604B CN 201910591634 A CN201910591634 A CN 201910591634A CN 110305604 B CN110305604 B CN 110305604B
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- sodium hydroxide
- bagasse
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 105
- 239000000853 adhesive Substances 0.000 title claims abstract description 103
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 14
- 229920002261 Corn starch Polymers 0.000 claims abstract description 12
- 239000008120 corn starch Substances 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 111
- 241000609240 Ambelania acida Species 0.000 claims description 43
- 239000010905 bagasse Substances 0.000 claims description 43
- 238000003756 stirring Methods 0.000 claims description 33
- 239000000843 powder Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 9
- 239000004202 carbamide Substances 0.000 claims description 9
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical group OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 claims description 7
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229960005323 phenoxyethanol Drugs 0.000 claims description 7
- GNHOJBNSNUXZQA-UHFFFAOYSA-J potassium aluminium sulfate dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GNHOJBNSNUXZQA-UHFFFAOYSA-J 0.000 claims description 7
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 7
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 7
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 7
- 239000000600 sorbitol Substances 0.000 claims description 7
- 239000010457 zeolite Substances 0.000 claims description 7
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 230000003449 preventive effect Effects 0.000 claims description 4
- 239000011111 cardboard Substances 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 22
- 229920002472 Starch Polymers 0.000 abstract description 13
- 235000019698 starch Nutrition 0.000 abstract description 13
- 239000008107 starch Substances 0.000 abstract description 13
- 238000004132 cross linking Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 21
- 239000002994 raw material Substances 0.000 description 8
- 230000000844 anti-bacterial effect Effects 0.000 description 6
- 239000000123 paper Substances 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 240000000111 Saccharum officinarum Species 0.000 description 2
- 235000007201 Saccharum officinarum Nutrition 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004382 Amylase Substances 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010447 natron Substances 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229960004793 sucrose Drugs 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses an adhesive for corrugated boards and a preparation method thereof, belonging to the technical field of adhesives, and the key point of the technical scheme is that the adhesive for the corrugated boards comprises the following components in parts by weight: 420 parts of corn starch 380-. The drier can obviously promote the volatilization of water and shorten the curing time; through the cooperation of the reinforcing agent and the stabilizing agent, the crosslinking degree between starch molecules can be improved, the toughness and the adhesive strength of the adhesive are improved, the problem of adhesive cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to an adhesive for corrugated boards and a preparation method thereof.
Background
The corrugated board is formed by bonding at least one layer of corrugated paper and one layer of box board, has good elasticity and extensibility, and is mainly used for manufacturing cartons, the sandwich of the cartons and other packaging materials of fragile commodities. Common adhesives for producing corrugated boards comprise sodium silicate, high-molecular latex, starch and the like; the natron (also called as water glass and sodium silicate) adhesive has the advantages of quick film forming and low price, but has the defects of poor moisture resistance, high alkalinity and corrosiveness; the high molecular latex adhesive has good adhesive property, but has higher cost and is not easy to degrade; the starch adhesive takes starch as a main raw material, has the advantages of high bonding strength, light weight, no pollution and the like, and is the main adhesive for the corrugated board at present.
In the prior art, patent application publication No. CN108795324A discloses a corn starch adhesive for corrugated cardboard, which is composed of the following components in parts by mass: 15-25 parts of corn starch, 3-8 parts of nickel sulfate, 2-5 parts of sodium hypochlorite, 40-75 parts of 15% sodium hydroxide solution, 5-15 parts of borax, 2-5 parts of an oxidant, 35-65 parts of water and 2-4 parts of a defoaming agent.
The starch adhesive is prepared by taking natural starch and water as main raw materials and carrying out processes such as gelatinization and complexation; however, the starch adhesive contains a large amount of water, so that the starch adhesive needs a long curing time and the production efficiency is influenced; in the curing process, if the water is not completely evaporated, the residual water at the bonding part of the corrugated board can also influence the bonding strength of the adhesive; in addition, in order to increase the drying speed, when the drying dehydration is carried out by adopting a high-temperature drying mode, the phenomenon of drying crack of the adhesive is easily caused, and the adhesive effect is reduced.
Disclosure of Invention
One of the purposes of the invention is to provide an adhesive for corrugated boards, which can obviously promote the volatilization of moisture and shorten the curing time through the action of a drier; through the cooperation of the reinforcing agent and the stabilizing agent, the crosslinking degree between starch molecules can be improved, the toughness and the adhesive strength of the adhesive are improved, the problem of adhesive cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient.
The technical purpose of the invention is realized by the following technical scheme:
the adhesive for the corrugated board comprises the following components in parts by weight: 420 parts of corn starch 380-.
By adopting the technical scheme, the volatilization of water can be obviously promoted under the action of the drier, and the curing time is shortened; through the cooperation of the reinforcing agent and the stabilizing agent, the crosslinking degree between starch molecules can be improved, the toughness and the adhesive strength of the adhesive are improved, the problem of adhesive cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient.
Further, the reinforcing agent is formed by mixing pretreated bagasse powder and sodium lignosulfonate in a weight ratio of 9: 1.
By adopting the technical scheme, the bagasse is the cane fiber after cane sugar squeezing, and the reinforcing agent prepared by mixing the sodium lignosulfonate with the bagasse can improve the toughness of the adhesive, reduce the cracking phenomenon and improve the bonding strength of the adhesive.
Further, the pretreated bagasse powder is prepared by the following method: taking 30-40 parts of bagasse, soaking the bagasse in 50-60 parts of 25-30wt% sodium hydroxide solution for 10-16h, then cleaning the soaked bagasse with clear water, adding 4-6 parts of sodium bisulfate and 3-5 parts of aluminum potassium sulfate dodecahydrate into the bagasse, heating to 80-90 ℃, drying for 4-6h, crushing and sieving to obtain the pretreated bagasse powder.
By adopting the technical scheme, the bagasse contains more lignin, and the pretreated bagasse powder is obtained by matching sodium hydrogen sulfate and aluminum potassium sulfate dodecahydrate after the alkalization treatment of sodium hydroxide, so that the bonding strength of the adhesive can be improved, the antibacterial and mildewproof effects of the adhesive can be improved, and the service life of the adhesive is prolonged.
Further, the stabilizer comprises sodium carboxymethylcellulose, sorbitol and urea in a weight ratio of 1:2: 2.
By adopting the technical scheme, the sodium carboxymethylcellulose, the sorbitol and the urea have better cohesiveness, water retention and suspension, so that the stability of the adhesive can be improved, and the layering condition of the adhesive can be reduced; and through the cooperation of the stabilizing agent and the drier, the volatilization of redundant moisture in the adhesive is promoted, the crosslinking degree among starch molecules is improved, the toughness of the adhesive is improved, the problem of adhesion cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient.
Further, the drier is formed by mixing zeolite powder, bentonite and dibutyltin dilaurate in a weight ratio of 2:2: 1.
By adopting the technical scheme, the drier prepared by mixing the zeolite powder, the bentonite and the dibutyltin dilaurate can improve the curing speed of the adhesive and shorten the curing time of the adhesive, and after the drier is matched with the stabilizer, the drying time is shortened, the toughness of the cured adhesive can be improved, and the condition of drying cracking caused by water loss is reduced.
Further, the mildew preventive is phenoxyethanol.
By adopting the technical scheme, the phenoxyethanol has good mildew-proof and antibacterial effects, can effectively improve the mildew-proof and antibacterial effects of the adhesive, and prolongs the service life of the adhesive.
The invention also aims to provide a preparation method of the adhesive for the corrugated board.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of an adhesive for corrugated boards comprises the following steps: heating 1150-1200 parts of water to 35-40 ℃, adding 20 parts of sodium hydroxide, stirring for 20-30s, adding 380-420 parts of corn starch and 7-9 parts of reinforcing agent, stirring for 40-60s, adding 24 parts of sodium hydroxide in batches, and stirring for 400-450 s; then, 0.5 part of sodium hydroxide is added every 90 seconds, and the operation is repeated for 6 to 10 times; then adding 4-5 parts of stabilizer, 3-4 parts of drier and 1-2 parts of mildew preventive, stirring for 80-100s, then adding 4.5-5.5 parts of borax, and continuing stirring for 500-700s to obtain the adhesive for the corrugated board.
Further, the addition in portions means: every 40s of stirring, 1-2 parts of sodium hydroxide are added until 24 parts of sodium hydroxide are completely added.
By adopting the technical scheme, the sodium hydroxide is added in batches, so that the sodium hydroxide and the corn starch can be fully reacted, and the stability of the product quality can be improved.
Further, the stirring speed is 50-200 r/min.
By adopting the technical scheme, the raw materials can be fully mixed by stirring at the speed of 50-200r/min, the generation of bubbles can be reduced, and the generation of foam holes can be reduced.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the drier can obviously promote the volatilization of water and shorten the curing time; through the matching of the reinforcing agent and the stabilizing agent, the crosslinking degree among starch molecules can be improved, the toughness and the bonding strength of the adhesive are improved, the problem of bonding cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient;
2. the bagasse is sugarcane fiber after sugarcane is pressed, and the reinforcing agent prepared by mixing sodium lignosulfonate with the bagasse can improve the toughness of the adhesive, reduce the cracking phenomenon and improve the bonding strength of the adhesive; the bagasse contains more lignin, and after the alkali treatment of sodium hydroxide, the bagasse is matched with sodium bisulfate and aluminum potassium sulfate dodecahydrate to obtain pretreated bagasse powder, so that the bonding strength of the adhesive can be improved, the antibacterial and mildewproof effects of the adhesive can be improved, and the service life of the adhesive is prolonged;
3. the sodium carboxymethylcellulose, the sorbitol and the urea have good cohesiveness, water retention and suspension, so that the stability of the adhesive can be improved, and the layering condition of the adhesive can be reduced; through the matching of the stabilizer and the drier, the volatilization of redundant moisture in the adhesive is promoted, the crosslinking degree among starch molecules is improved, the toughness of the adhesive is improved, the problem of adhesive cracking caused by excessive drying is prevented, the drying process is simpler, and the operation is convenient;
4. the curing speed of the adhesive can be improved and the curing time of the adhesive can be shortened by the drier mixed with the zeolite powder, the bentonite and the dibutyltin dilaurate, and after the drier is matched with the stabilizer, the drying time can be shortened, the toughness of the cured adhesive can be improved, and the condition of drying cracking caused by water loss can be reduced;
5. the phenoxyethanol has good mildew-proof and antibacterial effects, has a good compatilizer with ethanol, can effectively improve the mildew-proof and antibacterial effects of the adhesive, and prolongs the service life of the adhesive.
Detailed Description
The present invention will be described in further detail below.
First, preparation example of pretreated bagasse powder
Preparation example 1: soaking 30kg of bagasse in 50kg of 25 wt% sodium hydroxide solution for 10h, cleaning the soaked bagasse with clear water, adding 4kg of sodium bisulfate and 3kg of aluminum potassium sulfate dodecahydrate, heating to 80 ℃, drying for 4h, crushing and sieving to obtain the pretreated bagasse powder.
Preparation example 2: taking 35kg of bagasse, soaking the bagasse in 55kg of 28 wt% sodium hydroxide solution for 13h, then cleaning the soaked bagasse with clear water, adding 5kg of sodium bisulfate and 4kg of aluminum potassium sulfate dodecahydrate into the cleaned bagasse, heating to 85 ℃, drying for 5h, crushing and sieving to obtain pretreated bagasse powder.
Preparation example 3: taking 40kg of bagasse, soaking the bagasse in 60kg of 30wt% sodium hydroxide solution for 16h, then cleaning the soaked bagasse with clear water, adding 6kg of sodium bisulfate and 5kg of aluminum potassium sulfate dodecahydrate into the cleaned bagasse, heating to 90 ℃, drying for 6h, crushing and sieving to obtain pretreated bagasse powder.
Second, example
The corn starch in the following examples is selected from the industrial corn amylase with a product number of 968452, which is increased by Suzhou Longqing chemical technology Co., Ltd and has a content of more than or equal to 99%; the urea is selected from urea provided by Shanghai Ruixiang chemical technology Co., Ltd under the number RX-o 6.
Example 1: the adhesive for the corrugated board is prepared by the following method:
1150kg of water is taken and heated to 35 ℃, then 20kg of sodium hydroxide is added, after stirring for 20s at the speed of 50r/min, 380kg of corn starch, 6.3kg of pretreated bagasse powder (selected from preparation example 1 of the pretreated bagasse powder) and 0.7kg of sodium lignosulfonate are added, after stirring for 40s, 24kg of sodium hydroxide is added in portions, every 40s of stirring is carried out, 1kg of sodium hydroxide is added until all 24kg of sodium hydroxide is added, and after the addition is finished, the stirring is carried out for 400 s; then, 0.5kg of sodium hydroxide is added every 90 seconds, and the operation is repeated for 6 times; then, 0.8kg of sodium carboxymethylcellulose, 1.6kg of sorbitol, 1.6kg of urea, 1.2kg of zeolite powder, 1.2kg of bentonite, 0.6kg of dibutyltin dilaurate and 1kg of phenoxyethanol were added, and after stirring for 80 seconds, 4.5kg of borax was added, and after stirring for 500 seconds, the adhesive for corrugated boards was obtained.
Example 2: the adhesive for the corrugated board is prepared by the following method:
taking 1175kg of water, heating the water to 38 ℃, adding 20kg of sodium hydroxide, stirring the water for 25s at the speed of 100r/min, adding 400kg of corn starch, 7.2kg of pretreated bagasse powder (selected from preparation example 2 of the pretreated bagasse powder) and 0.8kg of sodium lignosulfonate, stirring the water for 50s, adding 24kg of sodium hydroxide in portions, adding 1.5kg of sodium hydroxide every 40s of stirring until all 24kg of sodium hydroxide is added, and stirring the water for 425s after the sodium hydroxide is added; then, 0.5kg of sodium hydroxide is added every 90 seconds, and the operation is repeated for 8 times; then, 0.9kg of sodium carboxymethylcellulose, 1.8kg of sorbitol, 1.8kg of urea, 1.4kg of zeolite powder, 1.4kg of bentonite, 0.7kg of dibutyltin dilaurate and 1.5kg of phenoxyethanol were added, and after stirring for 90 seconds, 5kg of borax was added, and after stirring for 600 seconds, the adhesive for corrugated boards was obtained.
Example 3: the adhesive for the corrugated board is prepared by the following method:
taking 1200kg of water, heating the water to 40 ℃, adding 20kg of sodium hydroxide, stirring the water at the speed of 200r/min for 30s, adding 420kg of corn starch, 8.1kg of pretreated bagasse powder (selected from preparation example 3 of the pretreated bagasse powder) and 0.9kg of sodium lignosulfonate, stirring the water for 60s, adding 24kg of sodium hydroxide in batches, adding 2kg of sodium hydroxide every 40s of stirring until all 24kg of sodium hydroxide is added, and stirring the water for 450s after the sodium hydroxide is added; then, 0.5kg of sodium hydroxide is added every 90 seconds, and the operation is repeated for 10 times; then, 1kg of sodium carboxymethylcellulose, 2kg of sorbitol, 2kg of urea, 1.6kg of zeolite powder, 1.6kg of bentonite, 0.8kg of dibutyltin dilaurate and 2kg of phenoxyethanol were added, and after stirring for 100 seconds, 5.5kg of borax was added, and after stirring for 700 seconds, the adhesive for corrugated boards was obtained.
Table 1 examples 1-3 raw material ingredient table
Third, comparative example
Comparative example 1: this comparative example differs from example 1 in that no drier was added to the starting material.
Comparative example 2: this comparative example differs from example 1 in that no stabilizer was added to the raw materials.
Comparative example 3: this comparative example differs from example 1 in that no reinforcing agent was added to the starting material.
Fourthly, performance test
Adhesives were prepared according to the methods of examples 1 to 3 and comparative examples 1 to 3, and their properties were measured according to the following methods, and the results are shown in table 2.
Adhesive strength: the performance of the adhesive is tested according to the test standard of the national standard GB/T6548 plus 2011 corrugated board adhesive strength.
Initial adhesion time: two paper strips are adhered by an adhesive, 20 groups are arranged, one group of adhered paper strips are peeled every 5s, and the time when the paper strips are damaged when the paper strips are peeled is the initial adhesion time.
Curing time: 2g of adhesive were weighed, placed on a hot plate, stirred constantly at 120 ℃ and the time for the adhesive to solidify into a solid state was recorded.
Appearance dry cracking phenomenon: weighing 2g of adhesive, placing the adhesive on a heating plate, drying and curing the adhesive at the temperature of 120 ℃, and observing the appearance dry cracking condition of the adhesive, wherein A is no dry cracking phenomenon; B. the number of the dry cracking stripes is 1-5; C. the number of the dry cracking stripes is more than 5.
TABLE 2 tables for testing the properties of the adhesives prepared in examples 1 to 3 and comparative examples 1 to 3
| Item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Adhesive Strength, N/m | 9.7 | 9.8 | 9.8 | 9.5 | 9.3 | 7.6 |
| Initial tack time, s | 36 | 38 | 39 | 54 | 42 | 45 |
| Curing time, s | 325 | 337 | 341 | 585 | 354 | 365 |
| Appearance of dry cracking | A | A | A | B | C | A |
As can be seen from the data in Table 2, the adhesive prepared by the invention has excellent adhesive strength, and the initial adhesion time and the curing time are shorter, which indicates that the adhesive can be cured in a shorter time and achieve better adhesive strength; in addition, when the adhesive is dried and cured at a higher temperature, the phenomenon of dry cracking cannot be generated, which shows that the adhesive can still maintain better appearance performance under a high-temperature drying condition, the phenomenon of dry cracking is not easy to generate, the processing temperature range is wider, and the operation is more convenient.
The raw materials of comparative example 1 were not added with a drier; the initial tack time and cure time of comparative example 1 are significantly longer than example 1, indicating that the drier can significantly shorten the cure time of the adhesive; the adhesive of comparative example 1 showed a small amount of dry cracking after curing, compared to example 1, which shows that the addition of the drier in combination with the stabilizer can improve the occurrence of dry cracking of the adhesive during high temperature curing.
The raw material of comparative example 2 was not added with a stabilizer; compared with the example 1, the number of appearance dry cracking stripes of the comparative example 2 is obviously increased, which shows that the stabilizer of the invention can improve the dry cracking phenomenon of the adhesive at high temperature; in addition, the adhesive strength of comparative example 2 was reduced to a small extent, and the tack time and the curing time were both significantly extended, indicating that the addition of the stabilizer also improves the adhesive strength of the adhesive and shortens the curing time.
No reinforcing agent was added to the raw material of comparative example 3; the adhesive strength of comparative example 3 was significantly reduced compared to example 1, indicating that the reinforcing agent of the present invention can significantly improve the adhesive strength of the adhesive; the tack time and cure time of comparative example 3 are significantly reduced compared to example 1, indicating that the addition of the reinforcing agent can increase the drying rate and reduce the cure time.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (5)
1. An adhesive for corrugated cardboard, characterized in that: the paint comprises the following components in parts by weight:
420 parts of corn starch 380-;
the reinforcing agent is formed by mixing pretreated bagasse powder and sodium lignosulfonate in a weight ratio of 9: 1;
the pretreated bagasse powder is prepared by the following method: taking 30-40 parts of bagasse, soaking the bagasse in 50-60 parts of 25-30wt% sodium hydroxide solution for 10-16h, then cleaning the soaked bagasse with clear water, adding 4-6 parts of sodium bisulfate and 3-5 parts of aluminum potassium sulfate dodecahydrate into the bagasse, heating to 80-90 ℃, drying for 4-6h, crushing and sieving to obtain pretreated bagasse powder;
the stabilizer comprises sodium carboxymethylcellulose, sorbitol and urea in a weight ratio of 1:2: 2;
the drier is prepared by mixing zeolite powder, bentonite and dibutyltin dilaurate in a weight ratio of 2:2: 1.
2. The adhesive for corrugated cardboard as claimed in claim 1, wherein: the mildew preventive is phenoxyethanol.
3. A preparation method of the adhesive for the corrugated board is characterized by comprising the following steps: the method comprises the following steps: heating 1150-1200 parts of water to 35-40 ℃, adding 20 parts of sodium hydroxide, stirring for 20-30s, adding 380-420 parts of corn starch and 7-9 parts of reinforcing agent, stirring for 40-60s, adding 24 parts of sodium hydroxide in batches, and stirring for 400-450 s; then, 0.5 part of sodium hydroxide is added every 90 seconds, and the operation is repeated for 6 to 10 times; then adding 4-5 parts of stabilizer, 3-4 parts of drier and 1-2 parts of mildew preventive, stirring for 80-100s, then adding 4.5-5.5 parts of borax, and continuing stirring for 500-700s to obtain the adhesive for the corrugated board.
4. The method of claim 3, wherein the adhesive comprises: the addition in portions means: every 40s of stirring, 1-2 parts of sodium hydroxide are added until 24 parts of sodium hydroxide are completely added.
5. The method of claim 3, wherein the adhesive comprises: the stirring speed is 50-200 r/min.
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| CN110885646A (en) * | 2019-11-05 | 2020-03-17 | 宁夏和瑞包装有限公司 | Preparation process and formula of corn starch adhesive for one-step glue making |
| CN111139000B (en) * | 2020-01-16 | 2021-09-10 | 上海乐盈纸业有限公司 | Adhesive for corrugated board and preparation method thereof |
| CN113462317A (en) * | 2021-06-25 | 2021-10-01 | 安徽金兄弟环保科技股份有限公司 | Corrugated board adhesive and preparation method thereof |
| CN113683982B (en) * | 2021-09-11 | 2023-01-03 | 杭州永晶科技有限公司 | Glue for compounding corrugated paper and preparation method thereof |
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| CN106085289A (en) * | 2016-07-26 | 2016-11-09 | 明辉大秦（上海）环保科技有限公司 | Environment-friendly type corrugated board low temperature laminating starch adhesive and preparation method thereof |
| CN109135616A (en) * | 2018-09-17 | 2019-01-04 | 常德市芙蓉实业发展有限责任公司 | A kind of carton paperboard Corn Starch Glue and its production method and its process units |
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| CN106085289A (en) * | 2016-07-26 | 2016-11-09 | 明辉大秦（上海）环保科技有限公司 | Environment-friendly type corrugated board low temperature laminating starch adhesive and preparation method thereof |
| CN109135616A (en) * | 2018-09-17 | 2019-01-04 | 常德市芙蓉实业发展有限责任公司 | A kind of carton paperboard Corn Starch Glue and its production method and its process units |
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