CN112941956A - Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof - Google Patents
Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof Download PDFInfo
- Publication number
- CN112941956A CN112941956A CN202110307214.3A CN202110307214A CN112941956A CN 112941956 A CN112941956 A CN 112941956A CN 202110307214 A CN202110307214 A CN 202110307214A CN 112941956 A CN112941956 A CN 112941956A
- Authority
- CN
- China
- Prior art keywords
- surface sizing
- sizing agent
- lunch box
- stiffness
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004513 sizing Methods 0.000 title claims abstract description 76
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 66
- 239000000835 fiber Substances 0.000 title claims abstract description 43
- 235000013311 vegetables Nutrition 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 238000004806 packaging method and process Methods 0.000 title abstract description 15
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 21
- 229920002472 Starch Polymers 0.000 claims abstract description 20
- 239000008107 starch Substances 0.000 claims abstract description 20
- 235000019698 starch Nutrition 0.000 claims abstract description 20
- 125000002091 cationic group Chemical group 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 48
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 38
- 239000000178 monomer Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 24
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 24
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 19
- BLCKNMAZFRMCJJ-UHFFFAOYSA-N cyclohexyl cyclohexyloxycarbonyloxy carbonate Chemical group C1CCCCC1OC(=O)OOC(=O)OC1CCCCC1 BLCKNMAZFRMCJJ-UHFFFAOYSA-N 0.000 claims description 19
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 19
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 239000003999 initiator Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 11
- 235000012054 meals Nutrition 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000003292 glue Substances 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000000047 product Substances 0.000 description 21
- 241000196324 Embryophyta Species 0.000 description 19
- 239000000654 additive Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 235000013305 food Nutrition 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000010902 straw Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011436 cob Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- 239000012744 reinforcing agent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
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
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
Abstract
The invention discloses a surface sizing agent for improving the stiffness of a vegetable fiber packaging lunch box and a preparation method thereof, belonging to the technical field of materials. After the surface sizing agent is obtained, the surface sizing agent is mixed with the cationic starch and polyacrylamide compound according to a certain proportion to form a sizing solution. The glue film is coated on the inner surface and the outer surface of the lunch box in a surface coating mode to form a continuous and complete glue film, so that the rigidity of the carton is obviously enhanced. The middle layer of the lunch box is a plant fiber base layer, and the inner layer and the outer layer are coated by surface sizing solution to form a rigid protective film so as to improve the properties of the lunch box such as stiffness, ring crush strength, tensile strength and the like. Tests on the indexes show that all indexes of the glued meal box are greatly improved, and the application prospect is wide.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a surface sizing agent for improving the stiffness of a plant fiber packaging lunch box and a preparation method thereof.
Background
China is a large wood consuming country, and most enterprises put the attention on plant fibers such as crop straws, bagasse and the like which are rich in resources and low in price due to the shortage of wood raw materials, so that the production of packaging paper boxes and meal boxes is favorable for reducing the environmental pollution pressure, improving the use efficiency of agricultural and sideline products, reducing the wood consumption and greatly relieving the shortage of the wood raw materials.
In order to fully utilize the raw materials of agricultural straws and the like, various plant fiber packaging products are developed, however, the tensile strength, the ring crush strength, the folding strength, the stiffness and the like of the fiber products are poor due to the poor strength of single fibers of the agricultural straw fibers, and the requirements of the market cannot be met. Compared with plastic packaging, although the plant fiber packaging material can reduce the environmental pollution pressure and save the cost, the rigidity of the packaging is not enough due to the material of the packaging, and the development of plant fiber products is greatly limited. In recent years, because the problem of environmental pollution caused by disposable plastic lunch boxes is becoming more serious, more and more attention is paid to the preparation of the plant fiber degradable environment-friendly packaging lunch boxes. But the defect that the stiffness is not enough and the lunch box is easy to fold is easy to shed and leak the food in the lunch box, thus influencing the convenience of carrying the lunch box, and the problem that the packing of the plant fiber degradable environment-friendly lunch box can not avoid the urgent need to be solved.
For the improvement of the stiffness of the lunch box, certain progress has been made at home and abroad at present, and some physical methods are tried to improve the stiffness of the lunch box, but the effect is not obvious. The developed various stiffness reinforcing agents have certain effects on the stiffness, the tensile strength and the ring crush strength of the product, and meanwhile, the use of the stiffness reinforcing agents also improves the folding resistance and the waterproof performance of the product to a certain extent. For example, in CN 108252151 a, tanglinyuan and the like invented a preparation method of a paper stiffness agent; CN 105332319 a discloses a stiffness agent for papermaking. However, because various stiffness agents in the market have complex components and complicated preparation, and have fewer types for improving the performance of the lunch box and poorer performance improvement effect, a novel stiffness agent is needed to be developed for preparing the plant fiber lunch box, and the stiffness, the tensile strength, the ring crush strength and the like of the lunch box are improved so as to develop the broad market for preparing the lunch box by using the agricultural straw fiber.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a surface sizing agent for improving the stiffness of a plant fiber packaging lunch box, which is used for improving the stiffness of the plant fiber lunch box so as to improve the mechanical property of the lunch box; it is another object of the present invention to provide a method for preparing the same.
The technical scheme is as follows: in order to achieve the purpose, the invention provides the following technical scheme:
the surface sizing agent for improving the stiffness of the vegetable fiber packaging lunch box comprises the following components in percentage by mass: 15 to 25 percent of cationic starch, 10 to 20 percent of polyacrylamide, 25 to 30 percent of styrene, 18 to 24 percent of hydroxyethyl methacrylate, 10 to 20 percent of butyl acrylate, 0.01 to 0.03 percent of sizing auxiliary agent and 1 to 5 percent of initiator; the mass percentage of the polyacrylamide and the cationic starch after being compounded in proportion is 35 to 45 percent.
Further, the sizing auxiliary agent is polyvinyl alcohol and calcium carbonate.
Further, the initiator is dicyclohexyl peroxydicarbonate.
Furthermore, the surface sizing agent takes the plant fiber lunch box as a base layer, and the sizing is carried out on the inner surface and the outer surface of the lunch box, so that the surface of the lunch box has a protective film with extremely high rigidity.
The preparation method of the surface sizing agent for improving the stiffness of the vegetable fiber packaging lunch box comprises the following steps:
1) preparing a surface sizing agent by using styrene and hydroxyethyl methacrylate as hard monomers and butyl acrylate as soft monomers;
2) mixing half of styrene, hydroxyethyl methacrylate and butyl acrylate monomers with deionized water at 55-65 ℃ and stirring to prepare emulsion for later use, adding the rest of deionized water, polyvinyl alcohol and calcium carbonate into a reaction flask, mixing, then adding the pre-emulsion, adding the rest of styrene, hydroxyethyl methacrylate and butyl acrylate monomers, introducing nitrogen, stirring, heating to react, dropwise adding a dicyclohexyl peroxydicarbonate initiator, keeping the temperature, cooling to room temperature, adding ammonia water, and adjusting the pH to be neutral;
3) coating the surface sizing solution on the inner and outer surfaces of the coarse product of the lunch box, and drying at the temperature of 100-110 ℃ after constant pressure for 1 minute.
Further, in the step 2), the temperature of the heating reaction is 70-80 ℃; the reaction time is 0.5-2h, and the heat preservation time is 1-3 h.
Further, in the step 3), the constant pressure is 3 to 5 KPa.
Further, in the step 3), the drying time is 10-30 minutes.
The invention principle is as follows: styrene and hydroxyethyl methacrylate are used as hard monomers, the rigidity of product molecules is increased, the ductility of the film is improved during sizing and drying, a compact continuous film is formed, and the sizing quality is improved. Butyl acrylate is used as a soft monomer, and the soft monomer and the hard monomer are polymerized in proportion to form stable emulsion. The polyacrylamide is added for assisting emulsification to obtain emulsion with smaller particle size, the stability and the gluing uniformity of the emulsion are improved, the addition of the oxidized starch paste is beneficial to improving the shrinkage potential energy, and further the elastic modulus is improved and the stiffness of the lunch box is improved.
Has the advantages that: compared with the existing stiffness agent, the surface sizing agent for improving the stiffness of the plant fiber packaging lunch box and the preparation method thereof are applied to the plant fiber packaging lunch box, can effectively improve the stiffness and the strength of the lunch box, and have important significance for solving the problems of shortage of raw materials of the lunch box and product quality caused by fiber quality. The test on the waterproof performance, the stiffness, the tensile strength, the folding strength and the ring crush strength of the lunch box using the surface sizing agent shows that the surface sizing agent has the best effect of improving the properties of the lunch box such as stiffness and the like under the condition of using the stiffness additive, and has wide market application prospect.
Drawings
FIG. 1 is a graph showing the change of stiffness of different processed meal boxes;
FIG. 2 is a graph showing the variation of ring crush strength of the meal box after different additives are treated;
FIG. 3 shows the tendency of Cobb value of different stiffness aid cutlery boxes with time.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
The surface sizing agent for improving the stiffness of the vegetable fiber lunch box is formed by uniformly coating the prepared surface sizing agent on the inner layer and the outer layer of a rough lunch box product serving as a base layer, and carrying out hot-pressing drying; the surface sizing agent is prepared from 15-25% of cationic starch, 10-20% of polyacrylamide, 25-30% of styrene, 18-24% of hydroxyethyl methacrylate, 10-20% of butyl acrylate, 0.01-0.03% of polyvinyl alcohol and calcium carbonate and 1-5% of dicyclohexyl peroxydicarbonate by mass percent, can be effectively sized on coarse products of lunch boxes, and improves the stiffness of the lunch boxes.
The raw materials and the reagents in the invention are all conventional materials sold in the market, have no special treatment and can be prepared from the same type of products of different merchants.
Example 1 preparation of surface sizing agent 1 for improving stiffness of lunch box
The surface sizing agent is synthesized by preparing 53 percent of deionized water, 8 percent of gelatinized starch, 6 percent of polyacrylamide, 10 percent of styrene, 8 percent of hydroxyethyl methacrylate, 12 percent of butyl acrylate, 3 percent of dicyclohexyl peroxydicarbonate, 0.02 percent of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 2 preparation of surface sizing agent 2 for improving stiffness of lunch box
Preparing 54% of deionized water, 8% of gelatinized starch, 6% of polyacrylamide, 10% of styrene, 8% of hydroxyethyl methacrylate, 12% of butyl acrylate, 2% of dicyclohexyl peroxydicarbonate, 0.01% -0.03% of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 3 preparation of surface sizing agent 3 for improving stiffness of lunch box
Preparing 52% of deionized water, 8% of gelatinized starch, 6% of polyacrylamide, 10% of styrene, 8% of hydroxyethyl methacrylate, 12% of butyl acrylate, 4% of dicyclohexyl peroxydicarbonate, 0.01% -0.03% of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 4 preparation of surface sizing agent 4 for improving stiffness of lunch box
Preparing 55% of deionized water, 8% of gelatinized starch, 6% of polyacrylamide, 10% of styrene, 8% of hydroxyethyl methacrylate, 10% of butyl acrylate, 3% of dicyclohexyl peroxydicarbonate, 0.02% of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 5 preparation of surface sizing agent 5 for improving stiffness of lunch box
Synthesizing a surface sizing agent, namely preparing 51% of deionized water, 8% of gelatinized starch, 6% of polyacrylamide, 10% of styrene, 8% of hydroxyethyl methacrylate, 14% of butyl acrylate, 3% of dicyclohexyl peroxydicarbonate, 0.02% of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 6 preparation of surface sizing agent 6 for improving stiffness of lunch box
Preparing 55% of deionized water, 6% of gelatinized starch, 6% of polyacrylamide, 10% of styrene, 8% of hydroxyethyl methacrylate, 12% of butyl acrylate, 3% of dicyclohexyl peroxydicarbonate, 0.02% of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 7 preparation of surface sizing agent 7 for improving stiffness of lunch box
The surface sizing agent is synthesized by preparing 51 percent of deionized water, 10 percent of gelatinized starch, 6 percent of polyacrylamide, 10 percent of styrene, 8 percent of hydroxyethyl methacrylate, 12 percent of butyl acrylate, 3 percent of dicyclohexyl peroxydicarbonate, 0.02 percent of polyvinyl alcohol and calcium carbonate according to mass percentage. Mixing half of monomers such as styrene, hydroxyethyl methacrylate, butyl acrylate and the like with deionized water at the temperature of 55-65 ℃, stirring at the rotating speed of 2000, adding polyacrylamide, continuously stirring, adding the rest monomers after 10 minutes, adding polyvinyl alcohol and calcium carbonate, stirring, heating to 70-80 ℃, dropwise adding dicyclohexyl peroxydicarbonate as an initiator, reacting for 30 minutes, keeping the temperature for 1 hour, cooling to room temperature, adjusting the pH to be neutral, and uniformly mixing with gelatinized starch to obtain the surface sizing agent.
Example 8 preparation of surface sizing agent for vegetable fiber meal box
The prepared surface sizing agent is used for rapidly sizing the surface of the prepared coarse product of the lunch box, and the sizing amount is 60g/m2The surface sizing agent only permeates into the surface layer, the elastic modulus increasing effect on the fiber grid is best, the stiffness of the lunch box is best improved, the inner surface and the outer surface of the rough lunch box product are quickly sprayed, then the rough lunch box product is placed under the constant pressure of 3-5KPa for 1 minute and dried at the temperature of 100-110 ℃ for 10-30 minutes to obtain the improved plant fiber lunch box.
Example 9 surface sizing agent for preparing modified vegetable fiber meal box is preferred
Selecting 7 lunch boxes from the lunch boxes in the same batch, respectively spraying surface sizing agents 1,2,3,4,5,6 and 7 to improve the performance of the lunch boxes, performing three tests, respectively preparing three mean values for comparison by using different sizing agent lunch boxes, randomly selecting and testing the stiffness, the compressive strength, the ring crush strength and the waterproof performance of the lunch boxes, wherein the test results are shown in the following table 1, comprehensively considering that after the surface sizing agent 1 is used, the comprehensive performance of the lunch box is optimal, and therefore, the surface sizing agent 1 is selected to prepare the plant fiber lunch box with improved stiffness.
TABLE 1 Effect of different ingredients of surface sizing agent on lunch box Performance
Example 10 comparison of the Properties of a surface sizing agent and a commercial stiffness aid for vegetable fiber meal boxes
Testing the deflection of the lunch box: two commercial stiffness enhancers (purchased from Shandong Taian company and Shandong Fangfang company) and the surface sizing agent of the invention are selected to carry out the rapid surface sizing on the prepared rough product of the lunch box by the same process, and the sizing amount is 60g/m2The surface sizing agent only penetrates into the surface layer, the inner surface and the outer surface of the coarse food box product are quickly sprayed, then the coarse food box product is placed at 3-5KPa constant pressure for 1 minute and dried at the temperature of 110 ℃ for 10-30 minutes to obtain the improved plant fiber food box A, B, C, the stiffness performance of the improved plant fiber food box is tested according to the Taber stiffness instrument method in GB/T22364 2018, paper and paperboard bending stiffness measurement, and the result is shown in figure 1.
And (3) testing ring crush strength: as for the deflection test, two commercial deflection reinforcing agents (purchased from Shandong Taian company and Shandong Weifang company) A and B and the surface sizing agent in the invention are selected to perform rapid surface sizing on the prepared coarse product of the lunch box by the same process to obtain the improved plant fiber lunch box, the ring crush strength performance of the lunch box is tested by a compression tester according to GB/T2679.8-2016 (determination of paper and paperboard ring crush strength), the ring crush strength index is shown in figure 2, compared with the coarse product of the lunch box, the ring crush strength index of the lunch box added with the commercial deflection additives A and B is improved by 10-20%, and the ring crush strength index of the lunch box after the novel surface sizing agent in the invention is added is improved by 30%, which shows that the surface sizing agent in the invention has excellent effect on improving the ring crush strength of the plant fiber lunch box.
And (3) testing the compressive strength: the coarse product of the lunch box is treated by different additives to obtain the lunch box with improved different additives, samples of the lunch box are sampled according to the steps of GB/T22898-2008 'paper and paperboard tensile strength measurement constant-speed tensile method', the tensile index result is obtained by testing with a tensile tester and calculating the tensile strength result, and the tensile index result shows that the lunch box treated by the surface sizing agent of the invention has a tensile index which is obviously superior to the lunch box treated by other additives, as shown in the following Table 2.
TABLE 2 change in tensile index of meal boxes treated with different auxiliaries
And (3) testing the waterproof performance: after obtaining A, B, C lunch box samples treated by different additives, using a dynamic contact angle tester to measure 10, 30 and 60s contact angle values of the lunch box, comparing the values, the result is shown in table 3, the larger the contact angle is, the better the waterproof effect is, and the change is smaller, compared with other lunch boxes, the lunch box of the invention has excellent waterproof performance, and the better the waterproof performance is, the quantitative water absorption (Cobb) value of the lunch box surface is used, 100mL water is accurately measured and poured into a cylinder, a weighed lunch box sheet is placed on a ring surface, a sample cover is pressed, the cylinder is turned over for 180 ℃, and timing is carried out simultaneously, and market-sold stiffness agents A and B are used as comparison, the Cobb value of the lunch box is smaller, the smaller the value is, the smaller the water absorption degree of the lunch box is shown, the less the water penetrates into the lunch box, and the stronger the waterproof performance of the lunch box is shown, the measurement results are shown in FIG. 3.
TABLE 3 variation of contact angle of lunch box treated with different stiffness additives
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (8)
1. A surface sizing agent for improving plant fiber packing cutlery box deflection, its characterized in that: the surface sizing agent comprises the following components in percentage by mass: 15 to 25 percent of cationic starch, 10 to 20 percent of polyacrylamide, 25 to 30 percent of styrene, 18 to 24 percent of hydroxyethyl methacrylate, 10 to 20 percent of butyl acrylate, 0.01 to 0.03 percent of sizing auxiliary agent and 1 to 5 percent of initiator; the mass percentage of the polyacrylamide and the cationic starch after being compounded in proportion is 35 to 45 percent.
2. A surface sizing agent for improving the stiffness of a vegetable fibre packing box according to claim 1 wherein: the sizing auxiliary agent is polyvinyl alcohol and calcium carbonate.
3. A surface sizing agent for improving the stiffness of a vegetable fibre packing box according to claim 1 wherein: the initiator is dicyclohexyl peroxydicarbonate.
4. A surface sizing agent for improving the stiffness of a vegetable fibre packing box according to claim 1 wherein: the surface sizing agent takes a vegetable fiber lunch box as a base layer, and the inside and outside surfaces of the lunch box are both sized.
5. A method of preparing a surface sizing agent for improving the stiffness of a vegetable fibre packing box according to any one of claims 1 to 4, characterized by comprising the steps of:
1) preparing a surface sizing agent by using styrene and hydroxyethyl methacrylate as hard monomers and butyl acrylate as soft monomers;
2) mixing half of styrene, hydroxyethyl methacrylate and butyl acrylate monomers with deionized water at 55-65 ℃ and stirring to prepare emulsion for later use, adding the rest of deionized water, polyvinyl alcohol and calcium carbonate into a reaction flask, mixing, then adding the pre-emulsion, adding the rest of styrene, hydroxyethyl methacrylate and butyl acrylate monomers, introducing nitrogen, stirring, heating to react, dropwise adding a dicyclohexyl peroxydicarbonate initiator, keeping the temperature, cooling to room temperature, adding ammonia water, and adjusting the pH to be neutral;
3) coating the surface sizing solution on the inner and outer surfaces of the coarse product of the lunch box, and drying at the temperature of 100-110 ℃ after constant pressure for 1 minute.
6. The method for preparing a surface sizing agent for improving the stiffness of a vegetable fiber packing box according to claim 5, wherein in the step 2), the temperature of the temperature raising reaction is 70-80 ℃; the reaction time is 0.5-2h, and the heat preservation time is 1-3 h.
7. The method of preparing a surface sizing agent for improving the stiffness of a vegetable fiber packing box according to claim 5, wherein said constant pressure in step 3) is 3-5 KPa.
8. The method of claim 5, wherein the drying time in step 3) is 10 to 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307214.3A CN112941956A (en) | 2021-03-23 | 2021-03-23 | Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307214.3A CN112941956A (en) | 2021-03-23 | 2021-03-23 | Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112941956A true CN112941956A (en) | 2021-06-11 |
Family
ID=76227941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110307214.3A Pending CN112941956A (en) | 2021-03-23 | 2021-03-23 | Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112941956A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457499A (en) * | 2007-12-14 | 2009-06-17 | 朱勇强 | Surface sizing agent and its production method |
| CN101768895A (en) * | 2009-01-07 | 2010-07-07 | 湖北大学 | Styrene-acrylate emulsion type high effective surface sizing agent and preparation method thereof |
| CN103437245A (en) * | 2013-09-05 | 2013-12-11 | 江西远宏实业有限公司 | Surface sizing starch substituting agent and preparation process thereof |
| CN104846697A (en) * | 2015-04-24 | 2015-08-19 | 杭州百事特实业股份有限公司 | Cation cross-linked styrene-acrylic surface sizing agent and preparation method thereof |
-
2021
- 2021-03-23 CN CN202110307214.3A patent/CN112941956A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457499A (en) * | 2007-12-14 | 2009-06-17 | 朱勇强 | Surface sizing agent and its production method |
| CN101768895A (en) * | 2009-01-07 | 2010-07-07 | 湖北大学 | Styrene-acrylate emulsion type high effective surface sizing agent and preparation method thereof |
| CN103437245A (en) * | 2013-09-05 | 2013-12-11 | 江西远宏实业有限公司 | Surface sizing starch substituting agent and preparation process thereof |
| CN104846697A (en) * | 2015-04-24 | 2015-08-19 | 杭州百事特实业股份有限公司 | Cation cross-linked styrene-acrylic surface sizing agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109811587B (en) | Corrugated raw paper surface sizing agent and preparation method and application thereof | |
| CN111533840B (en) | Environment-friendly water-resistant reinforced latex for paper and preparation method and application thereof | |
| CN111676728B (en) | Natural-color high-stiffness high-water-resistance raw paper for straw and preparation method thereof | |
| CN106947410B (en) | One kind is for corrugated paper board production line low-temperature quick-drying type starch adhesive and preparation method thereof | |
| CN113089380B (en) | Heat-sealing self-adhesive high-strength medical dialyzing paper and processing method thereof | |
| CN108359407A (en) | A kind of modified vegetable protein adhesive and preparation method thereof | |
| CN103866623B (en) | A kind of paper sizing agent and preparation method thereof | |
| CN110437397A (en) | A kind of macromolecule bamboo fibre, preparation method and applications | |
| CN109294516B (en) | Mussel bionic high-molecular adhesive material and preparation method thereof | |
| CN106188432A (en) | A kind of abietyl acrylic amide modified Semen sojae atricolor oil base solidification resin and preparation method thereof | |
| CN112941956A (en) | Surface sizing agent for improving stiffness of vegetable fiber packaging lunch box and preparation method thereof | |
| CN114702936B (en) | Water-based adhesive and preparation method and application thereof | |
| CN109208380B (en) | Paper using surface sizing agent | |
| CN113373734B (en) | Modified straw and application thereof in preparation of corrugated paper | |
| CN102009039B (en) | Gluing method for improving flat pressing strength of corrugated paper | |
| CN109337149B (en) | Multifunctional rubber composite material containing bacterial cellulose and preparation method thereof | |
| CN101519859B (en) | Synthetic method for cationic surface sizing agent | |
| CN111925453B (en) | Ecological cationic surface sizing reinforcing agent for papermaking and preparation method thereof | |
| AU2020100086A4 (en) | Method for improving strength properties of cardboard paper | |
| CN114057941A (en) | Carboxymethyl starch sodium-based concrete internal curing material and preparation method thereof | |
| CN106868940A (en) | A kind of page surface applying glue amylan and its processing method | |
| CN110423575B (en) | Preparation method of starch adhesive for corrugated paper | |
| LU502794B1 (en) | Method for preparing starch-based bio-latex by hydrolysis using immobilized enzyme | |
| CN117447947A (en) | Modified vegetable protein-acrylic ester adhesive and preparation method thereof | |
| CN115851181B (en) | Pagoda paper tube adhesive for steaming yarns and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210611 |
|
| RJ01 | Rejection of invention patent application after publication |