CN108130818B - Preparation method of double-color oil-proof antibacterial food packaging paper - Google Patents
Preparation method of double-color oil-proof antibacterial food packaging paper Download PDFInfo
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
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Abstract
The invention discloses a preparation method of double-color oil-proof antibacterial food packaging paper. The double-color oil-proof antibacterial food packaging paper is prepared by optimizing slurry components, pretreating and modifying the filler, and regulating and controlling the slurry components and the proportion of each layer by adopting a multi-layer flow box. The food packaging paper is beautiful, can play a role in dual antibacterial effects, does not lose hair or powder, and has the characteristics of health and environmental protection.
Description
Technical Field
The invention belongs to the technical field of papermaking, and particularly relates to a preparation method of double-color oil-proof antibacterial food packaging paper.
Technical Field
The environmental protection and safety of food packaging materials are always the focus of government and public attention. With the improvement of national requirements on environmental protection and safety of food packaging materials, paper gradually replaces plastic packaging in many fields due to the advantages of recycling and easy recovery. The development of food packaging and paper industry is driven by the rapid development of the fast food-digesting market, and for food packaging containing grease, the surface of paper is generally required to be coated with a film or wax to improve the water and oil resistance of the paper. However, the materials can bring in substances such as plastics, wax and the like in the recovery process, which not only brings a plurality of difficulties for a waste paper recovery system, but also makes the plastics difficult to degrade and difficult to recover. In addition, wax or coated plastic products coated on the surface of oil-proof packaging materials for fast-food consumption may also raise concerns about food safety.
As the requirements of the public on food health are improved, the antibacterial food packaging material draws attention gradually, and the antibacterial performance of the material can be improved by adding an inorganic or organic antibacterial agent into the paper packaging material, but the production cost of the paper is increased. The unbleached sulfate bamboo pulp is mainly used in the field of paper for daily use at present and is less applied in the field of food packaging due to natural antibacterial and bacteriostatic properties.
In the process of making the food packaging paper, certain mineral filler is often required to be added, the filler is often mixed with slurry for making, a large amount of filler runs off into white water, and the filler can adsorb a large amount of chemical additives such as cationic starch, sizing agents and the like, so that the water resistance of the paper is reduced, and the treatment load of the white water is increased. The filler left on the surface of the paper can also cause the problem that the product is fluffed and powdered in the printing process of the food packaging paper, and the production efficiency is reduced.
In order to solve the problems that the existing oil-proof food packaging paper is poor in environmental protection performance and improves the safety and the attractiveness of the oil-proof packaging paper, the oil-proof and antibacterial performance of a food packaging material is improved through the structural design and the raw material design of paper. In addition, the food packaging paper prepared by the invention does not need to be coated with a film or wax, and the filler is sealed by the upper layer and the lower layer of the paper, so that the retention rate of the filler can be obviously improved, and the problems of hair and powder falling are avoided.
Disclosure of Invention
The invention aims to provide a preparation method of double-color oil-proof antibacterial food wrapping paper, which overcomes the defects in the prior art. Meanwhile, the filler is sealed by the upper layer and the lower layer of the paper, so that the retention rate of the filler can be obviously improved, and the problems of hair and powder falling are avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of double-color oil-proof antibacterial food packaging paper comprises the following steps:
mixing bleached chemical softwood and hardwood pulp boards according to the proportion of (2:8) - (7:3) for pulping, then carrying out pulping treatment by a double-disc mill, and finally feeding the pulp into a pulp preparation pool A; adding cationic starch and a wet strength agent into the pulp preparation tank A, uniformly mixing, and pumping the pulp to the pulp forming tank A;
pulping unbleached bamboo fiber pulp boards, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing pool A or a pulp mixing pool B, pulping long fibers by a double-disc mill, and finally feeding pulp into a pulp mixing pool B; adding cationic starch and a wet strength agent into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
adding a white mineral filler into a filler tank to prepare a filler suspension; adding a chitosan solution and sodium alginate into the filler mixed suspension liquid, fully mixing the chitosan solution and the sodium alginate with the filler suspension liquid, and adjusting the pH value of the suspension liquid by adopting alkali to obtain a modified filler suspension liquid;
step two, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; and (3) enabling the pulp in the pulp forming pool A to enter the lower layer or the upper layer of the multilayer flow box, enabling the pulp in the pulp forming pool B to enter the upper layer or the lower layer of the multilayer flow box, enabling the modified filler suspension to enter the middle layer of the multilayer flow box after concentration, and performing a papermaking process through a fourdrinier machine to obtain the double-color oil-proof antibacterial food packaging paper with the laminated structure.
The beating concentration of the mixed pulp is 3.8-4.5%, and the beating degree of the mixed pulp is 35-50 DEG SR.
Pulping long fibers in a double disc mill, wherein the pulping concentration is 3.8-4.5%, the pulping degree is 35-50 DEG SR, and feeding the pulp into a pulp blending pool after pulping; the mass ratio of the short fibers pumped into the pulp blending pool A to the bleaching chemical pulp is (1-2): 20; or pumping all the short fibers of the unbleached bamboo pulp into the pulp mixing tank B to be mixed with the long fiber part of the unbleached pulp after pulping.
The dosage of the cationic starch is 0.1 to 0.3 percent of the mass of the oven-dried fiber; the wet strength agent is polyamide polyamine epichlorohydrin resin, and the dosage of the wet strength agent is 0.15-0.30% of the absolute dry fiber mass.
The filler is one or two of kaolin, talcum powder, heavy calcium carbonate and titanium dioxide, and the concentration of the prepared filler suspension is 10-15%.
The deacetylation degree of the chitosan is 80-90%, 5% acetic acid solution is adopted to dissolve the chitosan, and the concentration of the prepared chitosan solution is 0.5-2.5%; the dosage of the chitosan is 1 to 6 percent (relative) of the mass of the oven-dried filler.
In the second step, the filling amount of the filler is 0-20%.
Separating and sizing the sizing agent in the sizing pool A, the filler and the sizing agent in the sizing pool B, feeding the sizing agent into a multi-layer pulp flow box, performing layered forming by adjusting the number of floating pieces, squeezing, drying and then performing surface sizing; the surface sizing adopts cationic starch and oil-proof agent, and the glue spreading amount is 1-3 g/m2(ii) a The oil-proof agent is a fluorocarbon type oil-proof agent,the mass ratio of the oil-proofing agent to the cationic starch is as follows: 1, (25-10).
In the second step, the concentration of the slurry of the upper layer of the multi-layer pulp flow box is 0.4-0.7%, the concentration of the suspension of the middle layer modified filler is 0.5-2%, and the concentration of the slurry of the lower layer is 0.6-0.8%.
And in the second step, the ratio of the pulp speed to the forming wire speed is 0.90-1.00 when the paper machine is used for manufacturing.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, through the structural design of paper, after the filler is pretreated and modified, the components and the proportion of each layer of slurry are regulated and controlled by adopting a multi-layer flow box, and the double-color oil-proof antibacterial food packaging paper is prepared. The oleophobic property of the paper filler is utilized, and the paper filler is used as an intermediate layer to prevent grease penetration due to the characteristics of plant fibers. In the concrete structure, the upper layer and the lower layer of the paper are bleached pulp and unbleached pulp (unbleached pulp), so that the attractiveness of the packaging paper can be improved, different surface properties of the paper can be given, and the processability, the practicability and the product diversity are improved. The unbleached bamboo fiber has natural antibacterial and bacteriostatic effects, further enhances the antibacterial performance of the food packaging paper, and can play a role in double-layer antibacterial protection by combining with the filler layer for antibiosis. The long fibers are pulped after the bamboo pulp is classified, so that the pulping energy consumption can be reduced, meanwhile, the fine components of the unbleached bamboo pulp are added into the bleached pulp, the paper can be enhanced, the anti-counterfeiting effect and the attractiveness effect can be achieved, and the product grade is improved. As the chitosan has oil-proof performance and antibacterial performance, the chitosan can be used as a filler modifier to further enhance the oil-proof performance and antibacterial performance of paper. Meanwhile, the filler is sealed by the upper layer and the lower layer of the paper, so that the problems of hair and powder falling are avoided. The food packaging paper prepared by the invention does not need to be coated with a film or wax, has low ration, can save fiber resources, and simultaneously has multiple functions of oil resistance, antibiosis and the like.
Experiments show that: the quantitative amount of the prepared two-color oil-proof antibacterial food packaging paper is 23-35 g/m2The paper tightness is 0.70-0.76 g/m3Water absorption less than or equal to 20g/m3The oil resistance grade is higher than 6 grade, the tensile strength is more than or equal to 2.8kN/m, the tearing strength is more than or equal to 130mN, the front surface of the paper is white,the whiteness is more than or equal to 75% ISO, the back surface of the paper is yellowish, the whiteness is 28-35% ISO, the opacity is more than or equal to 62%, the smoothness of the front surface of the paper is more than or equal to 70s, the smoothness of the front surface of the paper is more than or equal to 50s, the decolorization test is negative, the paper does not contain fluorescent substances, and salmonella, shigella or staphylococcus aureus cannot be detected.
Detailed Description
The invention relates to a preparation method of double-color oil-proof antibacterial food packaging paper, which comprises the following steps:
mixing bleached chemical softwood and hardwood pulp boards according to the ratio of 2: 8-7: 3, pulping by using a double disc mill, and finally feeding the pulp into a pulp mixing tank A; adding cationic starch and a wet strength agent into the pulp preparation tank A, uniformly mixing, and pumping the pulp to the pulp forming tank A; the beating concentration of the mixed pulp is 3.8-4.5%, and the beating degree of the mixed pulp is 35-50 DEG SR.
Secondly, pulping the unbleached bamboo fiber pulp board, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing pool A or a pulp mixing pool B, pulping long fibers by a double disc mill, and finally feeding pulp into the pulp mixing pool B; adding cationic starch and a wet strength agent into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
after pulping and grading natural color bamboo pulp, pulping long fibers in a double disc mill, wherein the pulping concentration is 3.8-4.5%, the pulping degree is 35-50 DEG SR, and pulping the bamboo pulp in a pulp blending pool.
After natural color bamboo pulp is subjected to pulping and grading, according to the actual needs of products, short fibers are pumped into a pulp blending pool A by a pump and are matched with bleaching chemical pulp in a ratio of (1-2): 20; according to the requirement of the product, the short fibers of the unbleached bamboo pulp can be completely pumped into the pulp distribution tank B to be mixed with the long fiber part of the unbleached pulp after pulping.
The dosage of the cationic starch is 0.1 to 0.3 percent (relative to the mass of the oven-dried fiber), and the dosage of the wet strength agent is 0.15 to 0.30 percent (relative to the mass of the oven-dried fiber).
Adding a white mineral filler into a filler tank, and preparing a filler suspension with a certain concentration by using tap water; adding a chitosan solution and sodium alginate in a certain proportion into the filler mixed suspension liquid, fully mixing the chitosan solution and the sodium alginate with the filler mixed suspension liquid, and adjusting the pH value of the suspension liquid by adopting sodium hydroxide to obtain a modified filler suspension liquid;
the filler used in the third step is one or two of kaolin, talcum powder, heavy calcium carbonate and titanium dioxide, and the concentration of the prepared filler suspension is 10-15%.
The deacetylation degree of the chitosan used in the third step is 80-90%, 5% acetic acid solution is adopted to dissolve the chitosan, and the concentration of the prepared chitosan solution is 0.5-2.5%. The dosage of the chitosan is 1 to 6 percent (relative to the mass of the oven dry filler).
Step four, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; and (2) enabling the pulp in the pulp forming pool A to enter a lower layer or an upper layer of the multilayer flow box, enabling the pulp in the pulp forming pool B to enter an upper layer or a lower layer of the multilayer flow box, enabling the modified filler suspension to enter a middle layer of the multilayer flow box after concentration, forming, squeezing, pre-drying, surface sizing, post-drying, curling, rewinding and packaging by using a fourdrinier machine to obtain the double-color oil-proof antibacterial food packaging paper, wherein the paper has a laminated structure.
Wherein, the filling amount of the filler in the fourth step is 0 to 20 percent according to actual needs. The sizing agent A of the sizing pool, the filler and the sizing agent B of the sizing pool are separated and sized, the sizing agent enters a multi-layer flow box, the layering forming is carried out by adjusting the number of the floating pieces, the surface sizing is needed after the squeezing and the drying, and the water resistance of two sides of the paper is improved.
The concentration of the slurry on the upper layer of the multi-layer pulp flow box is 0.4-0.7%, the concentration of the modified filler suspension on the middle layer is 0.5-2%, and the concentration of the slurry on the lower layer is 0.6-0.8%. The ratio of the pulp speed to the forming wire speed is 0.90-1.00 when the paper machine is used for manufacturing.
The yankee dryer and the common dryer are combined for drying, the surface of the dryer is made of alloy steel, and one side of the paper which is not bleached or bleached can be in contact with the dryer according to requirements, so that the smoothness of the paper sheet is improved. The surface sizing adopts cationic starch and oil-proof agent, and the glue spreading amount is 1-3 g/m2. The oil-proof agent is a fluorocarbon type oil-proof agentThe mass ratio of the cationic starch to the cationic starch is as follows: 1:25 to 1: 10.
The present invention is described in further detail below with reference to examples:
example 1
Mixing bleached chemical softwood and hardwood pulp boards according to the ratio of 2:8 for pulping, and then carrying out pulping treatment through a double-disc mill, wherein the pulping concentration of the mixed pulp is 3.8%, and the pulping degree of the mixed pulp is 40 DEG SR. Finally, the slurry enters a slurry preparation pool A; adding cationic starch in an amount of 0.1% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.15% (based on the mass of the oven-dried fiber) into a pulp preparation tank A, uniformly mixing, and pumping the pulp into a pulp forming tank A;
step two, pulping unbleached bamboo fiber pulp boards, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing pool A, and feeding the short fibers into the pulp mixing pool A by a pump to be mixed with bleaching chemical pulp in a ratio of 1: 20; pulping the long fibers by a double disc mill, wherein the pulping concentration is 4.5 percent, the pulping degree is 35 DEG SR, and finally feeding the pulp into a pulp blending pool B; adding cationic starch in an amount of 0.12% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.18% (based on the mass of the oven-dried fiber) into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
step three, adding talcum powder into a filler tank, and preparing a filler suspension with tap water, wherein the concentration is 10%; adding a certain proportion of chitosan solution and sodium alginate into the filler mixed suspension, wherein the deacetylation degree of the chitosan is 80%, and dissolving the chitosan by adopting 5% acetic acid solution, wherein the concentration of the prepared chitosan solution is 0.5%. The filler suspension is mixed well with the chitosan, and the dosage of the chitosan is 1 percent (relative to the weight of the absolutely dry filler). Adjusting the pH of the suspension by using sodium hydroxide to obtain a modified filler suspension;
step four, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; the pulp in the pulp forming pool A enters the lower layer of the multilayer pulp flow box, the pulp in the pulp forming pool B enters the upper layer of the multilayer pulp flow box, the modified filler suspension is subjected to concentration and then enters the middle layer of the multilayer pulp flow box, and the filling amount (the mass ratio of the fiber to the filler) of the filler) Is 0%. The concentration of the upper layer slurry of the multi-layer pulp flow box is 0.4 percent, and the concentration of the lower layer slurry is 0.6 percent. The ratio of the slurry speed to the forming wire speed was 0.90 during paper machine manufacturing. Forming by a fourdrinier machine, pressing, pre-drying, and surface sizing, wherein the surface sizing adopts cationic starch and oil-proof agent, and the glue coating amount is 1g/m2The mass ratio of the oil-proof agent to the cationic starch is as follows: 1:25. And then drying, curling, rewinding and packaging to obtain the double-color oil-proof antibacterial food packaging paper, wherein the paper has a laminated structure.
The ration of the prepared two-color oil-proof antibacterial food packaging paper is 23g/m2The tightness of finished paper is 0.70g/m3Water absorption less than or equal to 20g/m3The oil resistance grade is higher than 6 grade, the tensile strength is higher than or equal to 2.8kN/m, the tearability is higher than or equal to 130mN, the front surface of the paper is white, the whiteness is higher than or equal to 75% ISO, the back surface of the paper is yellow, the whiteness is 28-35% ISO, the opacity is higher than or equal to 62%, the smoothness of the front surface of the paper is higher than or equal to 70s, the smoothness of the front surface of the paper is higher than or equal to 50s, the decolorization test is negative, the paper does not contain fluorescent substances.
Example 2
Mixing bleached chemical softwood and hardwood pulp boards according to the ratio of 3:7 for pulping, and then carrying out pulping treatment through a double-disc mill, wherein the pulping concentration of the mixed pulp is 4.5%, and the pulping degree of the mixed pulp is 50 DEG SR. Finally, the slurry enters a slurry preparation pool A; adding cationic starch in an amount of 0.3% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.20% (based on the mass of the oven-dried fiber) into the pulp preparation tank A, uniformly mixing, and pumping the pulp into the pulp forming tank A;
pulping the unbleached bamboo fiber pulp board, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing tank B, pulping long fibers by a double-disc mill, wherein the pulping concentration is 3.8%, the pulping degree is 35 DEG SR, and finally feeding the pulp into the pulp mixing tank B; adding cationic starch in an amount of 0.2% (relative to the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.30% (relative to the mass of the oven-dried fiber) into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
adding kaolin into a filler tank, and preparing a filler suspension with the concentration of 15% by using tap water; adding a certain proportion of chitosan solution and sodium alginate into the filler mixed suspension, wherein the deacetylation degree of the chitosan is 90%, dissolving the chitosan by adopting 5% acetic acid solution, the concentration of the prepared chitosan solution is 2.5%, and the dosage of the chitosan is 6% (to the weight of absolutely dry filler). Fully mixing the filler suspension with the modified filler suspension, and adjusting the pH of the suspension by using sodium hydroxide to obtain the modified filler suspension;
step four, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; the slurry in the stock-forming pool A enters the upper layer of the multilayer pulp flow box, the slurry in the stock-forming pool B enters the lower layer of the multilayer pulp flow box, the modified filler suspension enters the middle layer of the multilayer pulp flow box after being subjected to concentration, and the filling amount (mass ratio of fiber to filler) of the filler is 20%. The concentration of the slurry on the upper layer of the multi-layer pulp flow box is 0.7 percent, the concentration of the modified filler suspension on the middle layer is 0.5 percent, and the concentration of the slurry on the lower layer is 0.8 percent. The ratio of the slurry speed to the forming wire speed was 1.00 in the paper machine production. Forming by a fourdrinier machine, pressing, pre-drying, and surface sizing, wherein the surface sizing adopts cationic starch and oil-proof agent, and the glue coating amount is 3g/m2The mass ratio of the oil-proof agent to the cationic starch is 1: 10. And then drying, curling, rewinding and packaging to obtain the double-color oil-proof antibacterial food packaging paper, wherein the paper has a laminated structure.
The ration of the prepared two-color oil-proof antibacterial food packaging paper is 30g/m2The tightness of finished paper is 0.74g/m3Water absorption less than or equal to 20g/m3The oil resistance grade is higher than 6 grade, the tensile strength is higher than or equal to 2.8kN/m, the tearability is higher than or equal to 130mN, the front surface of the paper is white, the whiteness is higher than or equal to 75% ISO, the back surface of the paper is yellow, the whiteness is 28-35% ISO, the opacity is higher than or equal to 62%, the smoothness of the front surface of the paper is higher than or equal to 70s, the smoothness of the front surface of the paper is higher than or equal to 50s, the decolorization test is negative, the paper does not contain fluorescent substances.
Example 3
Mixing and pulping bleached chemical softwood and hardwood pulp boards according to the ratio of 5:5, and then pulping by using a double-disc mill, wherein the pulping concentration of the mixed pulp is 4.5%, and the pulping degree of the mixed pulp is 50 DEG SR. Finally, the slurry enters a slurry preparation pool A; adding cationic starch in an amount of 0.3% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.30% (based on the mass of the oven-dried fiber) into the pulp preparation tank A, uniformly mixing, and pumping the pulp into the pulp forming tank A;
step two, pulping unbleached bamboo fiber pulp boards, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing pool A, and feeding the short fibers into the pulp mixing pool A by a pump to be mixed with bleaching chemical pulp in a ratio of 2: 20; pulping the long fibers by a double disc mill, wherein the pulping concentration is 4.0 percent, the pulping degree is 40 DEG SR, and finally feeding the pulp into a pulp blending pool B; adding cationic starch in an amount of 0.1 percent (relative to the mass of the absolutely dry fiber) and a wet strength agent in an amount of 0.25 percent (relative to the mass of the absolutely dry fiber) into the pulp preparation tank B, uniformly mixing, and pumping the pulp into a pulp forming tank B;
adding talcum powder and heavy calcium carbonate into a filler tank, and preparing a filler suspension with tap water, wherein the concentration is 12%; adding a certain proportion of chitosan solution and sodium alginate into the filler mixed suspension, wherein the deacetylation degree of the chitosan is 85%, dissolving the chitosan by adopting 5% acetic acid solution, the concentration of the prepared chitosan solution is 1.0%, and the dosage of the chitosan is 3% (to the weight of absolutely dry filler). Fully mixing the filler suspension with the modified filler suspension, and adjusting the pH of the suspension by using sodium hydroxide to obtain the modified filler suspension;
step four, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; the pulp in the pulp forming pool A enters the lower layer of the multilayer pulp flow box, the pulp in the pulp forming pool B enters the upper layer of the multilayer pulp flow box, the modified filler suspension is subjected to concentration and then enters the middle layer of the multilayer pulp flow box, and the filling amount (mass ratio of fiber to filler) of the filler is 10%. The concentration of the slurry of the upper layer of the multi-layer pulp flow box is 0.5 percent, the concentration of the suspension of the middle layer modified filler is 2 percent, and the concentration of the slurry of the lower layer is 0.7 percent. The ratio of the slurry speed to the forming wire speed was 0.995 in the paper machine manufacturing. Forming by a fourdrinier machine, pressing, drying before, and applying glue on the surface, wherein the surface is applied by cationic starch and oil-proof agent, and the glue application amount is 2g/m2The mass ratio of the oil-proof agent to the cationic starch is 1: 15.And then drying, curling, rewinding and packaging to obtain the double-color oil-proof antibacterial food packaging paper, wherein the paper has a laminated structure.
The ration of the prepared two-color oil-proof antibacterial food packaging paper is 28g/m2The tightness of finished paper is 0.75g/m3Water absorption less than or equal to 20g/m3The oil resistance grade is higher than 6 grade, the tensile strength is higher than or equal to 2.8kN/m, the tearability is higher than or equal to 130mN, the front surface of the paper is white, the whiteness is higher than or equal to 75% ISO, the back surface of the paper is yellow, the whiteness is 28-35% ISO, the opacity is higher than or equal to 62%, the smoothness of the front surface of the paper is higher than or equal to 70s, the smoothness of the front surface of the paper is higher than or equal to 50s, the decolorization test is negative, the paper does not contain fluorescent substances.
Example 4
Mixing bleached chemical softwood and hardwood pulp boards according to the ratio of 7:3 for pulping, and then pulping by double disc grinding, wherein the pulping concentration of the mixed pulp is 3.8-4.5%, and the pulping degree of the mixed pulp is 42 DEG SR. Finally, the slurry enters a slurry preparation pool A; adding cationic starch in an amount of 0.1% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.18% (based on the mass of the oven-dried fiber) into the pulp preparation tank A, uniformly mixing, and pumping the pulp into the pulp forming tank A;
pulping the unbleached bamboo fiber pulp board, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing tank B, pulping long fibers by a double-disc mill, wherein the pulping concentration is 4.1%, the pulping degree is 48 DEG SR, and finally feeding the pulp into the pulp mixing tank B; adding cationic starch in an amount of 0.23% (based on the mass of the oven-dried fiber) and a wet strength agent in an amount of 0.15% (based on the mass of the oven-dried fiber) into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
adding kaolin and titanium dioxide into a filler tank, and preparing a filler suspension with tap water, wherein the concentration is 13%; adding a certain proportion of chitosan solution and sodium alginate into the filler mixed suspension, wherein the deacetylation degree of the chitosan is 90%, dissolving the chitosan by adopting 5% acetic acid solution, the concentration of the prepared chitosan solution is 2.0%, and the dosage of the chitosan is 4% (to the weight of absolutely dry filler). Fully mixing the filler suspension with the modified filler suspension, and adjusting the pH of the suspension by using sodium hydroxide to obtain the modified filler suspension;
step four, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; the slurry in the stock-forming pool A enters the upper layer of the multilayer pulp flow box, the slurry in the stock-forming pool B enters the lower layer of the multilayer pulp flow box, the modified filler suspension enters the middle layer of the multilayer pulp flow box after being subjected to concentration, and the filling amount (mass ratio of fiber to filler) of the filler is 8%. The concentration of the slurry on the upper layer of the multi-layer pulp flow box is 0.6 percent, the concentration of the modified filler suspension on the middle layer is 1.0 percent, and the concentration of the slurry on the lower layer is 0.8 percent. The ratio of the slurry speed to the forming wire speed was 0.95 in the paper machine production. Forming by a fourdrinier machine, pressing, drying before, and applying glue on the surface, wherein the surface is applied by cationic starch and oil-proof agent, and the glue application amount is 2.5g/m2The mass ratio of the oil-proof agent to the cationic starch is as follows: 1:12. And then drying, curling, rewinding and packaging to obtain the double-color oil-proof antibacterial food packaging paper, wherein the paper has a laminated structure.
The ration of the prepared two-color oil-proof antibacterial food packaging paper is 35g/m2The tightness of finished paper is 0.76g/m3Water absorption less than or equal to 20g/m3The oil resistance grade is higher than 6 grade, the tensile strength is higher than or equal to 2.8kN/m, the tearability is higher than or equal to 130mN, the front surface of the paper is white, the whiteness is higher than or equal to 75% ISO, the back surface of the paper is yellow, the whiteness is 28-35% ISO, the opacity is higher than or equal to 62%, the smoothness of the front surface of the paper is higher than or equal to 70s, the smoothness of the front surface of the paper is higher than or equal to 50s, the decolorization test is negative, the paper does not contain fluorescent substances.
Finally, it should be noted that: 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 equally replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A preparation method of double-color oil-proof antibacterial food packaging paper is characterized by comprising the following steps:
mixing bleached chemical softwood and hardwood pulp boards according to the proportion of (2:8) - (7:3) for pulping, then carrying out pulping treatment by a double-disc mill, and finally feeding the pulp into a pulp preparation pool A; adding cationic starch and a wet strength agent into the pulp preparation tank A, uniformly mixing, and pumping the pulp to the pulp forming tank A;
pulping unbleached bamboo fiber pulp boards, then passing through a fiber grading sieve, directly feeding short fibers into a pulp mixing pool A or a pulp mixing pool B, pulping long fibers by a double-disc mill, and finally feeding pulp into a pulp mixing pool B; adding cationic starch and a wet strength agent into the pulp preparation tank B, uniformly mixing, and pumping the pulp to the pulp forming tank B;
adding a white mineral filler into a filler tank to prepare a filler suspension; adding a chitosan solution and sodium alginate into the filler mixed suspension liquid, fully mixing the chitosan solution and the sodium alginate with the filler suspension liquid, and adjusting the suspension liquid to be neutral by adopting alkali to obtain a modified filler suspension liquid;
step two, after the pulp in the pulping tank A and the pulping tank B are respectively subjected to concentration and deslagging, adding a retention aid, and then screening; the pulp in the pulp forming pool A enters the lower layer or the upper layer of the multilayer flow box, the pulp in the pulp forming pool B enters the upper layer or the lower layer of the multilayer flow box, the modified filler suspension liquid enters the middle layer of the multilayer flow box after being subjected to concentration adjustment, and a fourdrinier machine is used for carrying out a papermaking process, so that the bicolor oil-proof antibacterial food packaging paper with a laminated structure is obtained;
separating and sizing the sizing agent in the sizing pool A, the filler and the sizing agent in the sizing pool B, feeding the sizing agent into a multi-layer pulp flow box, performing layered forming by adjusting the number of floating pieces, squeezing, drying and then performing surface sizing; the surface sizing adopts cationic starch and oil-proof agent, and the glue spreading amount is 1-3 g/m2(ii) a The oil-proof agent is a fluorocarbon oil-proof agent, and the mass ratio of the oil-proof agent to the cationic starch is as follows: 1, (25-10).
2. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, characterized in that the beating concentration of the mixed pulp is 3.8-4.5%, and the beating degree of the mixed pulp is 35-50 ° SR.
3. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, characterized in that long fibers are pulped in a double disc mill, the pulping concentration is 3.8-4.5%, the pulping degree is 35-50 ° SR, and the pulped long fibers enter a pulp blending pool; the mass ratio of the short fibers pumped into the pulp blending pool A to the bleaching chemical pulp is (1-2): 20; or pumping all the short fibers of the unbleached bamboo pulp into the pulp mixing tank B to be mixed with the long fiber part of the unbleached pulp after pulping.
4. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, characterized in that the amount of cationic starch is 0.1-0.3% of the mass of the oven-dried fiber; the wet strength agent is polyamide polyamine epichlorohydrin resin, and the dosage of the wet strength agent is 0.15-0.30% of the absolute dry fiber mass.
5. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, characterized in that in the first step, the used filler is one or two of kaolin, talcum powder, ground calcium carbonate and titanium dioxide, and the concentration of the prepared filler suspension is 10-15%.
6. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, characterized in that in the first step, the deacetylation degree of the chitosan is 80-90%, 5% acetic acid solution is adopted to dissolve the chitosan, and the concentration of the prepared chitosan solution is 0.5-2.5%; the dosage of the chitosan is 1 to 6 percent of the mass of the oven-dried filler.
7. The preparation method of the bicolor oil-proof antibacterial food packaging paper according to claim 1, wherein in the second step, the filling amount of the filler is 0-20%.
8. The method for preparing double-color oil-proof and antibacterial food packaging paper according to claim 1, wherein in the second step, the concentration of the slurry on the upper layer of the multi-layer headbox is 0.4% -0.7%, the concentration of the suspension of the middle-layer modified filler is 0.5% -2%, and the concentration of the slurry on the lower layer is 0.6% -0.8%.
9. The preparation method of the bicolor oil-proof antibacterial food wrapping paper according to claim 1, wherein in the second step, the ratio of the pulp speed to the forming wire speed is 0.90-1.00 during papermaking by a paper machine.
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| CN116180495B (en) * | 2023-02-22 | 2023-08-25 | 华邦古楼新材料有限公司 | Chitosan modified food packaging paper and preparation method thereof |
| CN116289328B (en) * | 2023-03-10 | 2023-12-08 | 华邦古楼新材料有限公司 | High water resistance food packaging body paper |
| CN116988334B (en) * | 2023-07-11 | 2024-06-21 | 中国制浆造纸研究院衢州分院 | Preparation method of plasma treatment modified environment-friendly food oil-proof paper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993525A (en) * | 2014-05-29 | 2014-08-20 | 黄山金仕特种包装材料有限公司 | Candy wrapping body paper and preparation method thereof |
| CN104911954A (en) * | 2015-05-28 | 2015-09-16 | 句容市茂源织造厂 | Natural anti-oil degradable food packaging paper and preparation method thereof |
| CN106245459A (en) * | 2016-09-05 | 2016-12-21 | 珠海红塔仁恒包装股份有限公司 | A kind of true qualities flexible package punch paper and production technology thereof |
| CN106436475A (en) * | 2016-10-12 | 2017-02-22 | 福建希源纸业有限公司 | Food wrapping paper and production method thereof |
| CN107109797A (en) * | 2014-12-23 | 2017-08-29 | 德尔福特集团有限公司 | Environmentally friendly food wrapper |
-
2017
- 2017-12-21 CN CN201711397777.6A patent/CN108130818B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993525A (en) * | 2014-05-29 | 2014-08-20 | 黄山金仕特种包装材料有限公司 | Candy wrapping body paper and preparation method thereof |
| CN107109797A (en) * | 2014-12-23 | 2017-08-29 | 德尔福特集团有限公司 | Environmentally friendly food wrapper |
| CN104911954A (en) * | 2015-05-28 | 2015-09-16 | 句容市茂源织造厂 | Natural anti-oil degradable food packaging paper and preparation method thereof |
| CN106245459A (en) * | 2016-09-05 | 2016-12-21 | 珠海红塔仁恒包装股份有限公司 | A kind of true qualities flexible package punch paper and production technology thereof |
| CN106436475A (en) * | 2016-10-12 | 2017-02-22 | 福建希源纸业有限公司 | Food wrapping paper and production method thereof |
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