CN110644283A - Surface sizing agent for packaging paper and preparation method thereof - Google Patents
Surface sizing agent for packaging paper and preparation method thereof Download PDFInfo
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- CN110644283A CN110644283A CN201810673815.4A CN201810673815A CN110644283A CN 110644283 A CN110644283 A CN 110644283A CN 201810673815 A CN201810673815 A CN 201810673815A CN 110644283 A CN110644283 A CN 110644283A
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- 238000004513 sizing Methods 0.000 title claims abstract description 60
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 53
- 229920002261 Corn starch Polymers 0.000 claims abstract description 50
- 239000008120 corn starch Substances 0.000 claims abstract description 50
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 47
- 229920001577 copolymer Polymers 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims description 21
- 229920002472 Starch Polymers 0.000 claims description 18
- 235000019698 starch Nutrition 0.000 claims description 18
- 239000008107 starch Substances 0.000 claims description 18
- 239000004382 Amylase Substances 0.000 claims description 14
- 102000013142 Amylases Human genes 0.000 claims description 14
- 108010065511 Amylases Proteins 0.000 claims description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 235000019418 amylase Nutrition 0.000 claims description 14
- -1 polyoxypropylene Polymers 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 7
- 239000000194 fatty acid Substances 0.000 claims description 7
- 229930195729 fatty acid Natural products 0.000 claims description 7
- 150000002191 fatty alcohols Chemical group 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 7
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 229920001059 synthetic polymer Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 235000013808 oxidized starch Nutrition 0.000 description 2
- 239000001254 oxidized starch Substances 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention provides a surface sizing agent for packaging paper and a preparation method thereof, and relates to the technical field of papermaking sizing agents. The surface sizing agent for the packaging paper is prepared from the following raw materials: corn starch, polyaluminium chloride, styrene-acrylate copolymer, reinforcing agent and defoaming agent. The surface sizing agent for the packaging paper can greatly improve the water resistance and moisture resistance of the packaging paper, has high strength, ensures that the sized finished paper is not influenced by high humidity and high temperature in summer, has high strength and long strength retention time, and prolongs the service life of the finished paper.
Description
Technical Field
The invention relates to the technical field of papermaking sizing agents, and relates to a surface sizing agent for packaging paper and a preparation method thereof.
Background
Surface sizing agents for wrapping paper can be classified into natural high-molecular surface sizing agents and synthetic polymer surface sizing agents. The natural polymer surface sizing agent is mainly starch (such as oxidized starch and cationic starch), and has the outstanding advantages of low cost and the defects of poor water resistance, limited reinforcing effect and easy hair and powder falling in the printing process. And therefore are often used in combination with other surface sizing agents. The natural polymer surface sizing agent comprises starch, animal glue, CMC and sodium alginate. The synthetic polymer surface sizing agent is a multifunctional surface sizing agent, mainly prepared from starch sizing materials (mainly enzyme-converted starch and oxidized starch), and auxiliary aluminum sulfate and defoaming agents, and is used for sizing for film transfer or soaking type sizing to be coated on the surface of paper, so that the sizing effect is achieved. Synthetic polymer surface sizing agents can be largely classified into 3 types: water soluble polymer surface sizing agent (SMA and SAA type); ② polymer water dispersion surface sizing agent (SAE type); ③ polyurethane water dispersion surface sizing agent (PUD type). The main disadvantages are high cost and non-ideal application effect for improving stiffness.
The existing surface sizing agent has limited improvement on the water resistance and moisture resistance of finished paper, the finished paper is easily influenced by high humidity and high temperature in summer, the strength of the finished paper is reduced, the sizing effect is poor, and the water resistance and moisture resistance are poor, so that the surface sizing agent for the packaging paper, which has a good sizing effect and can improve the water resistance and moisture resistance of the finished paper, is especially important to develop.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a surface sizing agent for packaging paper and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 80-96 parts of corn starch, 0.8-1.7 parts of polyaluminium chloride, 0.9-1.6 parts of styrene-acrylate copolymer, 8-17 parts of reinforcing agent and 0.1-0.5 part of defoaming agent.
Further, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 85-90 parts of corn starch, 1-1.5 parts of polyaluminium chloride, 1-1.5 parts of styrene-acrylate copolymer, 10-15 parts of reinforcing agent and 0.2-0.4 part of defoaming agent.
Further, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 88 parts of corn starch, 1.3 parts of polyaluminium chloride, 1.3 parts of styrene-acrylate copolymer, 13 parts of reinforcing agent and 0.3 part of defoaming agent.
Further, the corn starch is corn starch converted by amylase at 75-85 ℃.
Further, the solid content of the corn starch converted by the amylase is 15-25%, and the viscosity is 100-300 mPa.s.
Further, the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the content of sulfate radicals is less than or equal to 0.02 percent.
Further, the salinity of the polyaluminium chloride is 40-50%; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1 percent is 3.5-5.
Further, the pH value of the styrene-acrylate copolymer is 2-4, the solid content is not 30 +/-2%, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS.
Further, the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester.
A preparation method of a surface sizing agent for packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 6-10 times of the weight of the corn starch into the corn starch, heating and gelatinizing for 20-30min in a water bath at 70-85 ℃ after stirring, and then stirring and preserving heat for 40-50min in a water bath at 50-60 ℃ at the speed of 1000-;
s3, adding polyaluminium chloride, the styrene-acrylate copolymer, the reinforcing agent and the defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1200-1600r/min for 20-30min until a solution is obtained, and then preserving the temperature at 50-60 ℃ for 22-30 min.
The invention provides a surface sizing agent for packaging paper and a preparation method thereof, and compared with the prior art, the surface sizing agent has the advantages that:
the surface sizing agent for the packaging paper can greatly improve the water resistance and moisture resistance of the packaging paper, has high strength, ensures that the sized finished paper is not influenced by high humidity and high temperature in summer, has high strength and long strength retention time, and prolongs the service life of the finished paper;
the surface sizing agent for the packaging paper has the advantages of simple production process, no waste generation, no waste water discharge, stable performance and convenient transportation.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described below clearly and completely with reference to the embodiments, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
in the embodiment, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 80 parts of corn starch, 0.8-part of polyaluminium chloride, 0.9 part of styrene-acrylate copolymer, 8 parts of reinforcing agent and 0.1 part of defoaming agent;
wherein the corn starch is corn starch converted by amylase at 75 ℃, the solid content of the corn starch converted by the amylase is 15%, and the viscosity is 100 mPa.s; the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the sulfate radical content is less than or equal to 0.02 percent; the salinity of the polyaluminium chloride is 40 percent; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1% is 3.5; the PH value of the styrene-acrylate copolymer is 2, the solid content is 28%, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS; the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester;
the preparation method of the surface sizing agent for the packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 6 times of the weight of the corn starch into the corn starch, heating and gelatinizing the corn starch in a water bath at 70 ℃ for 20min after stirring, and then stirring and preserving the heat for 40min in a water bath at 50 ℃ at a speed of 1000r/min to obtain mixed starch;
s3, adding polyaluminium chloride, the styrene-acrylate copolymer, the reinforcing agent and the defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1200r/min for 20min until a solution is obtained, and then preserving the temperature at 50-60 ℃ for 22 min.
Example 2:
in the embodiment, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 96 parts of corn starch, 1.7 parts of polyaluminium chloride, 1.6 parts of styrene-acrylate copolymer, 17 parts of reinforcing agent and 0.5 part of defoaming agent;
wherein the corn starch is corn starch converted by amylase at 85 ℃, the solid content of the corn starch converted by the amylase is 25%, and the viscosity is 300 mPa.s; the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the sulfate radical content is less than or equal to 0.02 percent; the salinity of the polyaluminium chloride is 50 percent; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1% is 5; the PH value of the styrene-acrylate copolymer is 4, the solid content is 32%, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS; the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester;
the preparation method of the surface sizing agent for the packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 10 times of the weight of the corn starch into the corn starch, heating and gelatinizing the corn starch in a water bath at 85 ℃ for 30min after stirring, and then stirring and preserving heat for 50min in a water bath at 60 ℃ at a speed of 1200r/min to obtain mixed starch;
s3, adding polyaluminium chloride, the styrene-acrylate copolymer, the reinforcing agent and the defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1600r/min for 30min until a solution is obtained, and then preserving the temperature at 60 ℃ for 30 min.
Example 3:
in the embodiment, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 88 parts of corn starch, 1.3 parts of polyaluminium chloride, 1.3 parts of styrene-acrylate copolymer, 13 parts of reinforcing agent and 0.3 part of defoaming agent;
wherein the corn starch is corn starch converted by amylase at 80 ℃, the solid content of the corn starch converted by the amylase is 20%, and the viscosity is 200 mPa.s; the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the sulfate radical content is less than or equal to 0.02 percent; the salinity of the polyaluminium chloride is 45 percent; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1% is 4.2; the PH value of the styrene-acrylate copolymer is 3, the solid content is 30%, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS; the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester;
the preparation method of the surface sizing agent for the packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 8 times of the weight of the corn starch into the corn starch, heating and gelatinizing the corn starch in a 78 ℃ water bath for 25min after stirring, and then stirring and preserving the heat for 40-50min in a 55 ℃ water bath at a speed of 1100r/min to obtain mixed starch;
s3, adding polyaluminum chloride, styrene-acrylate copolymer, reinforcing agent and defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1400r/min for 25min until a solution is obtained, and then preserving heat at 55 ℃ for 26 min.
Example 4:
in the embodiment, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 85 parts of corn starch, 1 part of polyaluminium chloride, 1 part of styrene-acrylate copolymer, 10 parts of reinforcing agent and 0.2 part of defoaming agent;
wherein the corn starch is corn starch converted by amylase at 77 ℃, the solid content of the corn starch converted by the amylase is 15-25%, and the viscosity is 100-300 mPa.s; the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the sulfate radical content is less than or equal to 0.02 percent; the salinity of the polyaluminium chloride is 42%; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1% is 4; the PH value of the styrene-acrylate copolymer is 2.5, the solid content is 30 percent, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS; the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester;
the preparation method of the surface sizing agent for the packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 7 times of the weight of the corn starch into the corn starch, stirring, heating and gelatinizing in a water bath at 75 ℃ for 23min, and stirring in a water bath at 52 ℃ at a speed of 1000r/min and keeping the temperature for 48min to obtain mixed starch;
s3, adding polyaluminium chloride, the styrene-acrylate copolymer, the reinforcing agent and the defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1300r/min for 23min until a solution is obtained, and then preserving the temperature at 58 ℃ for 24 min.
Example 5:
in the embodiment, the surface sizing agent for the packaging paper is prepared from the following raw materials in parts by weight: 90 parts of corn starch, 1.5 parts of polyaluminium chloride, 1.5 parts of styrene-acrylate copolymer, 15 parts of reinforcing agent and 0.4 part of defoaming agent;
wherein the corn starch is corn starch converted by amylase at 82 ℃, the solid content of the corn starch converted by the amylase is 15-25%, and the viscosity is 100-300 mPa.s; the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the sulfate radical content is less than or equal to 0.02 percent; the salinity of the polyaluminum chloride is 48 percent; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1% is 4.5; the PH value of the styrene-acrylate copolymer is 3.5, the solid content is 31 percent, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS; the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester;
the preparation method of the surface sizing agent for the packaging paper comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 9 times of the weight of the corn starch into the corn starch, stirring, heating and gelatinizing for 29min in a 82 ℃ water bath, and then stirring and preserving heat for 42min in a 58 ℃ water bath at a speed of 1200r/min to obtain mixed starch;
s3, adding polyaluminum chloride, styrene-acrylate copolymer, reinforcing agent and defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1500r/min for 28min until a solution is obtained, and then preserving heat at 52 ℃ for 29 min.
The surface sizing agents prepared in examples 1-5 were applied by rod-scraping, which effectively avoided the stick-pasting phenomenon caused by aging of starch size.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The surface sizing agent for the packaging paper is characterized by being prepared from the following raw materials in parts by weight: 80-96 parts of corn starch, 0.8-1.7 parts of polyaluminium chloride, 0.9-1.6 parts of styrene-acrylate copolymer, 8-17 parts of reinforcing agent and 0.1-0.5 part of defoaming agent.
2. A surface sizing agent for wrapping paper according to claim 1, characterized in that the surface sizing agent for wrapping paper is prepared from the following raw materials in parts by weight: 85-90 parts of corn starch, 1-1.5 parts of polyaluminium chloride, 1-1.5 parts of styrene-acrylate copolymer, 10-15 parts of reinforcing agent and 0.2-0.4 part of defoaming agent.
3. A surface sizing agent for wrapping paper according to claim 1, characterized in that the surface sizing agent for wrapping paper is prepared from the following raw materials in parts by weight: 88 parts of corn starch, 1.3 parts of polyaluminium chloride, 1.3 parts of styrene-acrylate copolymer, 13 parts of reinforcing agent and 0.3 part of defoaming agent.
4. A surface sizing agent for wrapping paper according to claim 1, 2 or 3, characterized in that: the corn starch is corn starch converted by amylase at 75-85 ℃.
5. A surface sizing agent for wrapping paper according to claim 4, characterized in that: the solid content of the corn starch converted by the amylase is 15-25%, and the viscosity is 100-300mPa.
6. A surface sizing agent for wrapping paper according to claim 1, 2 or 3, characterized in that: the content of alumina in the polyaluminium chloride is more than or equal to 10 percent; the iron content is less than or equal to 0.005 percent; the content of sulfate radicals is less than or equal to 0.02 percent.
7. A surface sizing agent for wrapping paper according to claim 1, 2 or 3, characterized in that: the salinity of the polyaluminium chloride is 40-50%; the density of the polyaluminium chloride is more than or equal to 1.19 at the temperature of 20 ℃; the PH value of the polyaluminum chloride aqueous solution with the mass fraction of 1 percent is 3.5-5.
8. A surface sizing agent for wrapping paper according to claim 1, 2 or 3, characterized in that: the PH value of the styrene-acrylate copolymer is 2-4, the solid content is not 30 +/-2%, and the viscosity of the styrene-acrylate copolymer at 25 ℃ is less than 50 CPS.
9. A surface sizing agent for wrapping paper according to claim 1, 2 or 3, characterized in that: the defoaming agent is fatty alcohol polyoxypropylene ether polyoxyethylene ether fatty acid ester.
10. A method for preparing a surface sizing agent for wrapping paper as claimed in any one of claims, characterized by comprising the steps of:
s1, weighing the raw materials in parts by weight;
s2, adding water which is 6-10 times of the weight of the corn starch into the corn starch, heating and gelatinizing for 20-30min in a water bath at 70-85 ℃ after stirring, and then stirring and preserving heat for 40-50min in a water bath at 50-60 ℃ at the speed of 1000-;
s3, adding polyaluminium chloride, the styrene-acrylate copolymer, the reinforcing agent and the defoaming agent into the mixed starch prepared in the step S2, stirring at the speed of 1200-1600r/min for 20-30min until a solution is obtained, and then preserving the temperature at 50-60 ℃ for 22-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810673815.4A CN110644283A (en) | 2018-06-27 | 2018-06-27 | Surface sizing agent for packaging paper and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810673815.4A CN110644283A (en) | 2018-06-27 | 2018-06-27 | Surface sizing agent for packaging paper and preparation method thereof |
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| CN110644283A true CN110644283A (en) | 2020-01-03 |
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| CN201810673815.4A Pending CN110644283A (en) | 2018-06-27 | 2018-06-27 | Surface sizing agent for packaging paper and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796156A (en) * | 2020-12-30 | 2021-05-14 | 冠宏化工（扬州）有限公司 | Preparation method of whitening sizing agent |
| CN116949869A (en) * | 2023-07-04 | 2023-10-27 | 浙江景兴纸业股份有限公司 | A kind of pre-printed kraft cardboard and its preparation process |
Citations (5)
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| CN116949869A (en) * | 2023-07-04 | 2023-10-27 | 浙江景兴纸业股份有限公司 | A kind of pre-printed kraft cardboard and its preparation process |
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