CN114753184B - Water-based coating paint for food packaging paper and preparation method thereof - Google Patents
Water-based coating paint for food packaging paper and preparation method thereof Download PDFInfo
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- CN114753184B CN114753184B CN202210528142.XA CN202210528142A CN114753184B CN 114753184 B CN114753184 B CN 114753184B CN 202210528142 A CN202210528142 A CN 202210528142A CN 114753184 B CN114753184 B CN 114753184B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 76
- 238000000576 coating method Methods 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000003973 paint Substances 0.000 title claims abstract description 38
- 235000013305 food Nutrition 0.000 title claims abstract description 27
- 238000004806 packaging method and process Methods 0.000 title abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 84
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 66
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000003756 stirring Methods 0.000 claims abstract description 47
- 108010073771 Soybean Proteins Proteins 0.000 claims abstract description 35
- 229920002085 Dialdehyde starch Polymers 0.000 claims abstract description 34
- 239000007822 coupling agent Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 235000019710 soybean protein Nutrition 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000000123 paper Substances 0.000 abstract description 101
- 239000011087 paperboard Substances 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 25
- 229940001941 soy protein Drugs 0.000 description 18
- 239000004033 plastic Substances 0.000 description 12
- 229920003023 plastic Polymers 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 8
- 239000008199 coating composition Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000035622 drinking Effects 0.000 description 3
- -1 drying Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000004631 polybutylene succinate Substances 0.000 description 2
- 229920002961 polybutylene succinate Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229940071440 soy protein isolate Drugs 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
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- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
- D21H19/46—Non-macromolecular organic compounds
-
- 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
- D21H19/50—Proteins
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
Abstract
The invention belongs to the technical field of food packaging paper preparation, and particularly relates to a water-based coating paint for food packaging paper and a preparation method thereof. The preparation raw materials of the water-based coating paint for the food packaging paper comprise the following substances in parts by weight: 3 to 10 parts of dialdehyde starch, 5 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 15 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560. The preparation method comprises the following steps: adding dialdehyde starch, soybean protein isolate powder and water into a reactor in proportion, stirring and mixing uniformly, adding sodium hydroxide to adjust the pH value, and then heating and pasting. After the gelatinization reaction is finished, cooling the gelatinized material to normal temperature, adding silica sol and a coupling agent, and uniformly mixing to obtain the water-based coating paint for producing food packaging paper and paperboard. The food wrapping paper produced by the coating paint prepared by the invention has the advantages of high strength, good water resistance, environmental protection, simple preparation process and low cost, and is suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of food packaging paper preparation, and particularly relates to a water-based coating for food packaging paper and a preparation method thereof.
Background
With the release of the opinion on further reinforced plastic pollution control in China, new forbidden requirements are put forward for the use of plastic products in the catering industry, the control of the plastic products in the catering industry is further reinforced, and non-degradable disposable plastic straws, plastic bags, disposable foamed plastic lunch boxes, tableware and the like are forbidden nationwide. Meanwhile, the catering paper produced by using plant fiber as a raw material is an important substitute of plastic as a degradable renewable resource, and paper straws, paper bags and paper lunch boxes and tableware begin to appear on the market. However, the paper drinking utensils such as paper drinking straw made of food base paper can lose strength rapidly and soften and deform after meeting water, and thus cannot be used normally, and the paper drinking utensils are widely popularized, so that the food base paper needs to be further processed, and the water-resistant strength of the food base paper is improved and improved, so that the requirements of paper for the catering industry are met.
The basic characteristics of the method are that synthetic latex, organic high polymer solid paint or film are used as raw materials, and through coating, drying, hot-melt film coating or hot-pressing process, the base paper is used as base paper, on the surface of which a plastic glue layer is added, usually polyethylene or its modified substance, so as to achieve the purposes of blocking water and improving the dry and wet strength of the base paper product. However, the processed paper made by the method is essentially composite paper formed by sticking a plastic adhesive layer on the surface of base paper, and the composite paper still causes plastic pollution when being used in large quantities and also belongs to a forbidden product. And due to the heat treatment process of the processes, the problem of interface wrapping between the plastic and the base paper exists, and the subsequent repulping and recycling of the coated paper are difficult. Composite paper processed by degradable plastics such as polylactic acid (PLA), polybutylene succinate (PBS) and the like through film coating is degradable, but is high in price, and the problems that subsequent coated paper is difficult to repulpe and recycle exist.
Chinese patent (CN 102517983B) discloses a high-gloss water-based paint for papermaking coating and a preparation method thereof, and the problem of repulping and recycling of coated paper can be better solved because the problem of interface wrapping between plastic and base paper does not exist when the water-based paint is used for processing the coated paper, but the technical scheme of the patent adopts acrylic acid series synthetic resin as a main film forming substance of the paint. Acrylic resins have a large amount of organic monomers and auxiliaries remaining during the synthesis, which are toxic and harmful and also generate an odor. Meanwhile, for the water-based coating paint using polyacrylate as a main film forming substance, in order to achieve stable performance and good coating effect, polymers such as polyurethane, polystyrene and the like or monomers thereof are added in the synthesis or compounding process, so that the water-based coating paint has complex components, has a large amount of toxic and harmful substances, and is not suitable for producing coating paper for packaging in the food industry.
Disclosure of Invention
The invention aims to provide a water-based coating paint for food packaging paper.
The technical scheme of the invention is that the water-based coating paint for the food packaging paper comprises the following raw materials in parts by weight: 3 to 10 parts of dialdehyde starch, 5 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 15 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560.
Wherein the solid content of the silica sol is 20-30 wt%, and the pH value is 7-9.
Preferably, the preparation raw materials comprise the following substances in parts by weight: 3 to 6 parts of dialdehyde starch, 10 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 10 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560.
Preferably, the preparation raw materials comprise the following substances in parts by weight: 4 parts by weight of dialdehyde starch, 13 parts by weight of soybean protein isolate powder, 200 parts by weight of water, 8 parts by weight of silica sol and 0.25 part by weight of coupling agent KH560; the silica sol had a solid content of 20wt% and a pH of 7.
The invention also provides a preparation method of the water-based coating paint of the food packaging paper, which comprises the following steps:
(1) Adding 3-10 parts by weight of dialdehyde starch, 5-15 parts by weight of soybean protein isolate powder and 200 parts by weight of water into a reaction vessel, stirring and dispersing to form a mixed material;
(2) Adding sodium hydroxide into the mixture obtained in the step (1), adjusting the pH value of the mixture to 9-10, heating to 80-90 ℃ under the condition of stirring to carry out gelatinization reaction for 30-60 minutes;
(3) And (3) after the step (2) is finished, cooling the material obtained by the reaction to normal temperature, adding 5-15 parts by weight of silica sol and 0.2-0.3 part by weight of coupling agent KH560, and stirring and mixing uniformly to obtain the material.
Preferably, the gelatinization reaction time is 45 minutes.
Preferably, the gelatinization reaction temperature is 85 ℃.
The invention has the beneficial effects that:
in the process of preparing the water-based coating paint for producing the food packaging paper, the dialdehyde starch and the soybean protein isolate are processed from natural products, have no toxic or side effect on human bodies, can be biodegraded, and thoroughly solve the problem of plastic pollution of catering utensils.
In the process of preparing the water-based coating paint for producing the food packaging paper, the method of blending dialdehyde starch and the soybean protein isolate, heating and pasting is adopted, so that the dehydration crosslinking reaction of the dialdehyde starch and the soybean protein isolate is facilitated, and the film forming effect of the coating paint is improved.
And thirdly, in the process of preparing the water-based coating paint for producing the food packaging paper, the silica sol and the coupling agent are added, and the water resistance of the coating paint after curing is improved by utilizing the self-crosslinking of the silica sol and the hydrolytic coupling grafting effect between the silica sol and the isolated soy protein.
The coating paint prepared by the invention is water-based slurry type paint, and does not need to be melted again when in use, thereby eliminating the link that the traditional hot-melt laminating paint needs to be melted by heating and solving the problems of repulping and difficult recovery of the traditional coated paper. Meanwhile, the energy is saved, the process operation is simpler, and the method has industrial production value.
And (V) the invention does not add, generate and release any toxic and harmful substances.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, but it should not be construed that the scope of the above-described subject matter of the present invention is limited to the following examples.
Example 1 preparation of a coating composition according to the invention
6Kg of dialdehyde starch, 11Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 10Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for coating and processing catering paper, and the performance indexes of the processing paper obtained by testing (the testing method is executed according to GB/31122-2014 & lt & gt paperboard for liquid packaging) are shown in Table 1.
Example 2 preparation of a coating composition according to the invention
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding 30wt% of sodium hydroxide solution into the mixed material, adjusting the pH value of the mixed material to 9, heating the mixed material under the condition of stirring to carry out gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Example 3 preparation of a coating composition according to the invention
3Kg of dialdehyde starch, 12Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring to carry out gelatinization reaction at the temperature of 90 ℃ for 30 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.2Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Example 4 preparation of a coating composition according to the invention
Adding 3Kg of dialdehyde starch, 15Kg of soybean protein isolate powder and 200Kg of water into a reaction vessel, stirring and dispersing to form a mixed material. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 10, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 80 ℃ for 60 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 0.25Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
EXAMPLE 5 preparation of a coating composition according to the invention
6Kg of dialdehyde starch, 10Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 10Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing restaurant paper, and the performance indexes of the processed paper are shown in table 1.
Example 6 preparation of a coating composition according to the invention
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, heating the mixed material under the condition of stirring to carry out gelatinization reaction at the temperature of 90 ℃ for 30 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 5Kg of silica sol with the solid content of 30wt% and the pH value of 9 and 0.3Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Example 7 preparation of a coating composition according to the invention
5Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 10, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 10Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and uniformly stirring and mixing to obtain the water-based coating paint for producing the food packaging paper. The coating is used for processing restaurant paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 1
2Kg of dialdehyde starch, 12Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 2
Adding 7Kg of dialdehyde starch, 12Kg of isolated soybean protein powder and 200Kg of water into a reaction vessel, stirring and dispersing to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 10Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.2Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 3
4Kg of dialdehyde starch, 8Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing restaurant paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 4
5Kg of dialdehyde starch, 17Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 60 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.3Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 5
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, heating the mixed material under the condition of stirring to carry out gelatinization reaction at the temperature of 75 ℃ for 60 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 6
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 3Kg of silica sol with the solid content of 20wt% and the pH value of 7 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 7
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 12Kg of silica sol with the solid content of 30wt% and the pH value of 9 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the processed paper are shown in table 1.
Comparative example 8
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 10Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 1.5Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the paper obtained by testing are shown in table 1.
Comparative example 9
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring to carry out gelatinization reaction at the temperature of 95 ℃ for 30 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The paint is used for processing catering paper, and the performance indexes of the paper obtained by testing are shown in table 1.
Comparative example 10
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 9, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 0.35Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the paper obtained by testing are shown in table 1.
Comparative example 11
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water were added to a reaction vessel and stirred for dispersion to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 11, and heating the mixed material under the stirring condition to carry out gelatinization reaction at the temperature of 85 ℃ for 45 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the paper obtained by testing are shown in table 1.
Comparative example 12
4Kg of dialdehyde starch, 13Kg of isolated soy protein powder and 200Kg of water are added into a reaction vessel and stirred and dispersed to form a mixture. And then adding flaky sodium hydroxide into the mixed material, adjusting the pH value of the mixed material to 8, and heating the mixed material under the condition of stirring for gelatinization reaction at the temperature of 90 ℃ for 60 minutes. After the gelatinization reaction is finished, cooling the materials obtained by the reaction to normal temperature, adding 8Kg of silica sol with the solid content of 20wt% and the pH value of 9 and 0.25Kg of coupling agent KH560 into the silica sol, and stirring and mixing uniformly to obtain the coating product. The coating is used for processing catering paper, and the performance indexes of the paper obtained by testing are shown in table 1.
TABLE 1 Properties of the coating materials prepared in examples 1 to 7 and comparative examples 1 to 12 and indexes of properties of the coated papers prepared therefrom
Note: the national standards in the table are: GB/31122-2014 liquid packaging paperboard, the index listed is a differential index that can be affected by changes in the coating of the coated paper.
As can be seen from the data in Table 1 above, the coating obtained in examples 1 to 7 of the present invention has good properties, and various differences of the performance indexes of the coated paper meet or exceed the related technical index requirements specified in the national standard GB/31122-2014 paperboard for liquid packaging, wherein the coated paper obtained in example 2 has the best combination properties. In comparative example 1, the folding resistance of the coated paper was improved but the internal bond strength was reduced and the water resistance was poor because the amount of dialdehyde starch added was too small. In comparative example 2, the folding resistance of the coated paper was poor due to the excessive amount of dialdehyde starch added. In comparative example 3, the folding strength, internal bond strength and water resistance of the coated paper were poor due to the addition of the soybean protein isolate in an excessively low amount. In comparative example 4, the folding resistance and internal bond strength of the coated paper were good but the water resistance was poor due to the addition of an excessively large amount of soy protein isolate. In comparative example 5, the gelatinization temperature is too low, the gelatinization effect of the starch is poor, the quality of the prepared coating is poor, the layering phenomenon occurs, and various indexes of the coated paper are also poor. In comparative example 6, the amount of silica sol added was too small, and the coated paper had good folding endurance but poor internal bond strength and water resistance. In comparative example 7, since the amount of silica sol added was too large, the obtained coating was too viscous, workability was poor, and water resistance of the coated paper was poor. In comparative example 8, the amount of KH560 added was too small, and the coated paper had good folding endurance but poor internal bond strength and water resistance. In comparative example 9, the coating obtained was highly viscous due to the excessive pasting temperature, and had a gel phenomenon, and the folding resistance of the coated paper was poor. In comparative example 10, the amount of the coupling agent KH560 was increased, and the performance indexes of the obtained coating and coated paper were not significantly changed, which was not suitable in consideration of the cost. In comparative example 11, the coating preparation failed due to the hydrolytic deterioration of the soybean protein isolate caused by an excessively high pH value. In comparative example 12, the modified soy protein isolate was poor in dissolution effect due to excessively low pH, and the coating prepared was poor in quality and the coated paper was poor in quality.
The above embodiments are only used for illustrating the technical solutions of the present patent, and not for limiting the same; although the present patent is described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present patent.
Claims (7)
1. The water-based coating paint for the food wrapping paper is characterized by comprising the following raw materials in parts by weight: 3 to 10 parts of dialdehyde starch, 5 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 15 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560.
2. The aqueous coating paint according to claim 1, wherein the silica sol has a solid content of 20 to 30wt% and a pH of 7 to 9.
3. The aqueous coating paint according to claim 1 or 2, wherein the raw materials for preparing the aqueous coating paint comprise the following substances in parts by weight: 3 to 6 parts of dialdehyde starch, 10 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 10 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560.
4. The aqueous coating paint according to claim 3, wherein the raw materials for preparing the aqueous coating paint comprise the following substances in parts by weight: 4 parts by weight of dialdehyde starch, 13 parts by weight of soybean protein isolate powder, 200 parts by weight of water, 8 parts by weight of silica sol and 0.25 part by weight of coupling agent KH560; the silica sol had a solid content of 20wt% and a pH of 7.
5. The method for preparing the aqueous coating paint according to any one of claims 1 to 4, characterized by comprising the steps of: (1) Adding 3-10 parts by weight of dialdehyde starch, 5-15 parts by weight of soybean protein isolate powder and 200 parts by weight of water into a reaction vessel, stirring and dispersing to form a mixed material; (2) Adding sodium hydroxide into the mixture obtained in the step (1), adjusting the pH value of the mixture to 9-10, heating to 80-90 ℃ under the condition of stirring to carry out gelatinization reaction for 30-60 minutes; (3) And (3) after the step (2) is finished, cooling the material obtained by the reaction to normal temperature, adding 5-15 parts by weight of silica sol and 0.2-0.3 part by weight of coupling agent KH560, and stirring and mixing uniformly to obtain the product.
6. The method of claim 5, wherein the gelatinization reaction time is 45 minutes.
7. The method of claim 5, wherein the gelatinization reaction temperature is 85 ℃.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107719877A (en) * | 2017-09-29 | 2018-02-23 | 广东中穗纸品有限公司 | A kind of nanometer quick-freezing fresh-keeping carton |
| CN111608009A (en) * | 2020-05-18 | 2020-09-01 | 成都新柯力化工科技有限公司 | Ecological frozen food packaging paper and preparation method thereof |
| CN111944480A (en) * | 2020-08-25 | 2020-11-17 | 四川轻化工大学 | Silica sol soybean protein adhesive for fiberboard production and preparation method thereof |
| CN111944176A (en) * | 2020-08-19 | 2020-11-17 | 成都新柯力化工科技有限公司 | Starch-plant-based bio-plastic sheet for packaging and preparation method thereof |
| CN112480844A (en) * | 2020-11-26 | 2021-03-12 | 四川轻化工大学 | Preparation method of mildew-proof wallpaper adhesive and product thereof |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107719877A (en) * | 2017-09-29 | 2018-02-23 | 广东中穗纸品有限公司 | A kind of nanometer quick-freezing fresh-keeping carton |
| CN111608009A (en) * | 2020-05-18 | 2020-09-01 | 成都新柯力化工科技有限公司 | Ecological frozen food packaging paper and preparation method thereof |
| CN111944176A (en) * | 2020-08-19 | 2020-11-17 | 成都新柯力化工科技有限公司 | Starch-plant-based bio-plastic sheet for packaging and preparation method thereof |
| CN111944480A (en) * | 2020-08-25 | 2020-11-17 | 四川轻化工大学 | Silica sol soybean protein adhesive for fiberboard production and preparation method thereof |
| CN112480844A (en) * | 2020-11-26 | 2021-03-12 | 四川轻化工大学 | Preparation method of mildew-proof wallpaper adhesive and product thereof |
Non-Patent Citations (1)
| Title |
|---|
| 双醛淀粉改性大豆蛋白胶粘剂的性能;刘建容;《四川轻化工大学学报（自然科学版）》;20220228(第1期);全文 * |
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