CN113981742B - Wear-resistant antibacterial packaging paper for food packaging - Google Patents
Wear-resistant antibacterial packaging paper for food packaging Download PDFInfo
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- CN113981742B CN113981742B CN202111303971.XA CN202111303971A CN113981742B CN 113981742 B CN113981742 B CN 113981742B CN 202111303971 A CN202111303971 A CN 202111303971A CN 113981742 B CN113981742 B CN 113981742B
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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
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
-
- 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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
- D21H15/12—Composite fibres partly organic, partly inorganic
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- 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
-
- 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
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal 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
Abstract
The invention discloses wear-resistant antibacterial wrapping paper for food packaging, which consists of 20-25 parts of bagasse, 20-25 parts of corn stalk, 20-25 parts of dried straw, 4-6 parts of dispersing agent, 5-7 parts of wear-resistant agent, 10-15 parts of antibacterial modified composite fiber, 3-7 parts of antioxidant, 5-9 parts of inorganic flame retardant and 10-15 parts of antibacterial agent. The obtained wear-resistant antibacterial food packaging paper has good mechanical property and excellent antibacterial capability.
Description
Technical Field
The invention relates to the field of paper making, in particular to wear-resistant antibacterial packaging paper for food packaging.
Background
Food safety is closely related to daily life of human beings, and various links from food production to food transportation are likely to face food safety problems. For example, in various consumer locations, various convenience snack shops often use food packaging bags or food wrapping papers to package foods for convenience of carrying, and these materials for food packaging are particularly important for ensuring food safety and eating health. In terms of safety, it is desirable that these food packaging materials be hygienic, sterile, non-contaminating, and at the same time have a certain mechanical strength and abrasion resistance, avoiding the inconvenience of breakage during use, such as food packaging paper.
Disclosure of Invention
In order to meet the requirements of the technical background, the invention provides the antibacterial wear-resistant food packaging paper, and the obtained packaging paper has an antibacterial effect, high mechanical strength and good wear resistance.
The invention is realized by the following technical means.
An antibacterial wear-resistant food packaging paper is prepared from the following raw materials in parts by weight: 20-25 parts of bagasse, 20-25 parts of corn stalk, 20-25 parts of dried straw, 4-6 parts of dispersing agent, 5-7 parts of wear-resistant agent, 10-15 parts of antibacterial modified composite fiber, 3-7 parts of antioxidant, 5-9 parts of inorganic flame retardant and 10-15 parts of antibacterial agent.
Preferably, the antibacterial modified composite fiber is prepared from the following raw materials in parts by weight: 14-16 parts of polyvinyl chloride fibers, 11-14 parts of polyethylene fibers, 2-3 parts of silver nanoparticles, 4-6 parts of titanium dioxide and 5-7 parts of crosslinking agents.
Preferably, the preparation method of the antibacterial modified composite fiber comprises the following steps: weighing dry polyvinyl chloride fibers, heating the polyvinyl chloride fibers to 90 ℃ in an internal mixer to soften the polyvinyl chloride fibers for 2min, then adding the melted polyethylene fibers, stirring the mixture for 5min, adding silver nanoparticles, titanium dioxide and a cross-linking agent into the mixed fibers, heating the mixture to 180-205 ℃ and continuously stirring the mixture for 5h, and cooling the mixture to room temperature after stirring is finished to obtain the antibacterial modified composite fibers.
Preferably, the cross-linking agent is sodium dicyclopentadiene diformate.
The invention also discloses a preparation method of the wear-resistant antibacterial packaging paper for food packaging, which comprises the following steps:
(1) Putting bagasse, corn stalk and dried straw into a pulverizer to pulverize, putting the pulverized mixture into a digester, adding 2000 times of sodium hydroxide with concentration of 20% by weight for soaking for 8 hours, cooking for 2 hours with small fire, washing insoluble matters to be neutral, filtering and drying to obtain mixed plant fibers.
(2) Dispersing the mixed plant fiber obtained in the step (1) in water, adding a dispersing agent, an antiwear agent, an antibacterial modified composite fiber, an antioxidant, an inorganic flame retardant and an antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining the mixed paper pulp with the beating degree of 28-34 DEG SR.
(3) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, removing supernatant, making the lower layer raw material into paper sheets by using a paper making machine, drying at 50-60 ℃ for 3-4 hours, and obtaining the semi-finished paper.
(4) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
Preferably, the dispersant is sodium dodecyl sulfonate.
Preferably, the wear-resistant agent is silica aerogel powder.
Preferably, the antioxidant is tea polyphenol.
Preferably, the inorganic flame retardant is any ratio mixture of antimony trioxide and magnesium oxide.
Preferably, the antimicrobial agent is silver nanoparticles.
The beneficial effects of the invention are as follows:
(1) The antibacterial modified composite fiber used in the invention adopts two fibers of polyvinyl chloride and polyethylene to carry out hot melting, mixing and crosslinking to form a novel composite fiber, wherein the polyvinyl chloride has excellent corrosion resistance, and a crosslinking network is formed by the polyvinyl chloride and the polyethylene, so that better mechanical properties are obtained.
(2) In the preparation process of the antibacterial modified composite fiber, silver nano particles with an antibacterial effect are added, so that the prepared composite fiber has a good antibacterial effect, and in addition, the photocatalyst titanium dioxide is also added, so that the prepared composite fiber has a good photocatalytic degradation effect, and the pollution to the environment is reduced.
(3) The prepared food packaging paper contains silica aerogel, so that the food packaging paper has better wear resistance, the service life of the food packaging paper is prolonged, and the probability of breakage and food leakage in the use process is reduced. The addition of the antibacterial agent ensures that the food packaging paper has better antibacterial effect, and simultaneously promotes the antibacterial agent and the antibacterial modified composite fiber mutually, thereby further enhancing the antibacterial capability of the food packaging paper.
Detailed Description
Example 1
(1) And (3) putting 22 parts of bagasse, 21 parts of corn stalks and 22 parts of dried rice straw into a pulverizer for pulverization, putting the pulverized mixture into a digester, adding 2000 times of sodium hydroxide with the concentration of 20% for soaking for 8 hours, steaming with small fire for 2 hours, washing insoluble matters to be neutral, filtering and drying to obtain the mixed plant fiber.
(2) Weighing 15 parts of dry polyvinyl chloride fibers, heating to 90 ℃ in an internal mixer to soften for 2min, then adding 13 parts of melted polyethylene fibers, stirring for 5min, adding 3 parts of silver nano particles, 5 parts of titanium dioxide and 5 parts of cross-linking agent into the mixed fibers, heating to 180 ℃ to continue stirring for 5h, and cooling to room temperature after stirring is finished, thus obtaining the antibacterial modified composite fibers.
(3) Dispersing the mixed plant fiber obtained in the step (1) in water, adding 5 parts of dispersing agent, 6 parts of wear-resistant agent, 14 parts of antibacterial modified composite fiber, 6 parts of antioxidant, 7 parts of inorganic flame retardant and 10 parts of antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining the mixed paper pulp with the beating degree of 28-34 DEG SR.
(4) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, discharging supernatant, forming a paper sheet from the lower layer raw material by using a paper machine, drying at 50 ℃ for 4 hours, and obtaining the semi-finished paper.
(5) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
Example 2
(1) 20 parts of bagasse, 23 parts of corn stalks and 21 parts of dried rice straw are put into a pulverizer to be pulverized, the pulverized mixture is put into a digester, 2000 parts by weight of sodium hydroxide with the concentration of 20% is added for soaking for 10 hours, then the mixture is steamed for 2 hours with small fire, insoluble matters are washed to be neutral with water, and then the mixture is filtered and dried to obtain the mixed plant fiber.
(2) Weighing 16 parts of dry polyvinyl chloride fibers, heating to 100 ℃ in an internal mixer to soften for 2min, then adding 14 parts of melted polyethylene fibers, stirring for 5min, adding 3 parts of silver nano particles, 6 parts of titanium dioxide and 7 parts of cross-linking agent into the mixed fibers, heating to 185 ℃ to continue stirring for 5h, and cooling to room temperature after stirring is finished, thus obtaining the antibacterial modified composite fibers.
(3) Dispersing the mixed plant fiber obtained in the step (1) in water, adding 5 parts of dispersing agent, 7 parts of wear-resistant agent, 15 parts of antibacterial modified composite fiber, 6 parts of antioxidant, 8 parts of inorganic flame retardant and 13 parts of antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining the mixed paper pulp with the beating degree of 28-34 DEG SR.
(4) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, discharging supernatant, forming a paper sheet from the lower layer raw material by using a paper machine, drying at 60 ℃ for 3 hours, and obtaining the semi-finished paper.
(5) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
Example 3
(1) 25 parts of bagasse, 21 parts of corn stalk and 24 parts of dried straw are put into a pulverizer to be pulverized, the pulverized mixture is put into a digester, 2000 parts by weight of sodium hydroxide with concentration of 20% is added for soaking for 11 hours, then the mixture is steamed for 2 hours with small fire, insoluble matters are washed to be neutral, and then the mixture is filtered and dried to obtain the mixed plant fiber.
(2) Weighing 14 parts of dried polyvinyl chloride fibers, heating to 90-105 ℃ in an internal mixer, softening for 2min, then adding 14 parts of melted polyethylene fibers, stirring for 5min, adding 3 parts of silver nano particles, 4 parts of titanium dioxide and 5 parts of cross-linking agent into the mixed fibers, heating to 200 ℃ and continuously stirring for 5h, and cooling to room temperature after stirring is finished, thus obtaining the antibacterial modified composite fibers.
(3) Dispersing the mixed plant fiber obtained in the step (1) in water, adding 6 parts of dispersing agent, 6 parts of wear-resistant agent, 12 parts of antibacterial modified composite fiber, 7 parts of antioxidant, 7 parts of inorganic flame retardant and 11 parts of antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining the mixed paper pulp with the beating degree of 28-34 DEG SR.
(4) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, discharging supernatant, forming a paper sheet from the lower layer raw material by using a paper machine, drying at 50 ℃ for 3.5 hours, and obtaining the semi-finished paper.
(5) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
Example 4
(1) 20 parts of bagasse, 23 parts of corn stalks and 21 parts of dried rice straw are put into a pulverizer to be pulverized, the pulverized mixture is put into a digester, 2000 parts by weight of sodium hydroxide with the concentration of 20% is added for soaking for 10 hours, then the mixture is steamed for 2 hours with small fire, insoluble matters are washed to be neutral with water, and then the mixture is filtered and dried to obtain the mixed plant fiber.
(2) Weighing 15 parts of dry polyvinyl chloride fibers, heating to 95 ℃ in an internal mixer to soften for 2min, then adding 13 parts of melted polyethylene fibers, stirring for 5min, adding 3 parts of silver nano particles, 5 parts of titanium dioxide and 5 parts of cross-linking agent into the mixed fibers, heating to 205 ℃ to continue stirring for 5h, and cooling to room temperature after stirring is finished, thus obtaining the antibacterial modified composite fibers.
(3) Dispersing the mixed plant fiber obtained in the step (1) in water, adding 5 parts of dispersing agent, 5 parts of wear-resistant agent, 15 parts of antibacterial modified composite fiber, 6 parts of antioxidant, 9 parts of inorganic flame retardant and 13 parts of antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining the mixed paper pulp with the beating degree of 28-34 DEG SR.
(4) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, discharging supernatant, forming a paper sheet from the lower layer raw material by using a paper machine, drying at 60 ℃ for 3 hours, and obtaining the semi-finished paper.
(5) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
Antibacterial test: the wrapping paper obtained in examples 1-4 was cut to a size of 10 mm. Times.10 mm, and the cut sample was placed in a 250mL Erlenmeyer flask, and 70mL polybutylene succinate (PBS) and 5mL bacterial suspension were added, respectively. The Erlenmeyer flask is fixed on an oscillating shaking table, and the oscillating conditions are as follows: the temperature is 20-25 ℃, the oscillating speed is 400r/min, and the oscillating time is 5min. 1.0mLPBS was used as the sample solution before shaking in the test group. After shaking for 1 hour, 1.0mL of sample was taken. And respectively sucking 1.0mL of sample liquid before and after oscillation, inoculating the plates by an agar pouring method, inoculating two plates for each liquid sample, and placing the inoculated plates in a 37 ℃ incubator for culturing for 40 hours. The colony count was counted, and the antibacterial rate was calculated, and the results are shown in table 1.
TABLE 1
Antibacterial ratio = (average colony count before shaking-average colony count after shaking)/average colony count before shaking
The general wrapping paper was chosen as a comparative example to be compared with the wrapping paper of examples 1, 2, 3 and 4 of the present invention, respectively. The abrasion resistance of the abrasion resistant and antibacterial food wrapping papers prepared in examples 1 to 4 was measured using ASTM D3884Taber abrasion resistance test Standard; the tensile strength test is detected by a tensile strength tester; the aging time was measured by an aging test chamber and the temperature was adjusted to 85℃and the relative humidity to 85%, the air pressure to 106kPa and the ozone concentration to 45%. The results are shown in Table 2.
TABLE 2
As shown by the experimental results of the comparative experiments in the table, the wear-resistant and antibacterial video packaging paper has excellent wear resistance, can well protect packaged foods, prevents the problem of food leakage caused by the breakage of the packaging paper, and has excellent antibacterial capability, wherein the maximum antibacterial rate can reach 97.1%.
Claims (6)
1. The wear-resistant antibacterial packaging paper for food packaging is characterized by comprising the following components in parts by weight: 20-25 parts of bagasse, 20-25 parts of corn stalk, 20-25 parts of dried straw, 4-6 parts of dispersing agent, 5-7 parts of wear-resistant agent, 10-15 parts of antibacterial modified composite fiber, 3-7 parts of antioxidant, 5-9 parts of inorganic flame retardant and 10-15 parts of antibacterial agent;
the antibacterial modified composite fiber is prepared from the following components in parts by weight: 14-16 parts of polyvinyl chloride fibers, 11-14 parts of polyethylene fibers, 2-3 parts of silver nano particles, 4-6 parts of titanium dioxide and 5-7 parts of crosslinking agents;
the wear-resistant antibacterial packaging paper is prepared according to the following method:
(1) Crushing bagasse, corn stalks and dried straws in a crusher, putting the crushed mixture in a boiler, adding 2000 times of sodium hydroxide with the concentration of 20% by weight for soaking for 8 hours, steaming with small fire for 2 hours, washing insoluble matters to be neutral, filtering and drying to obtain mixed plant fibers;
(2) Dispersing the mixed plant fiber obtained in the step (1) in water, adding a dispersing agent, an antiwear agent, an antibacterial modified composite fiber, an antioxidant, an inorganic flame retardant and an antibacterial agent into paper pulp, pulping in a pulping machine, and obtaining mixed paper pulp with a beating degree of 28-34 DEG SR;
(3) Removing impurities in the mixed paper pulp by using a double-layer filter screen, standing for layering, removing supernatant, making the lower-layer raw material into paper sheets by using a paper making machine, and drying at 50-60 ℃ for 3-4 hours to obtain semi-finished paper;
(4) And (3) coating a polyurethane coating layer on the paper semi-finished product by using a coating machine, performing waterproof treatment, and finally, performing calendaring on a calendar, and taking out to obtain the food packaging paper.
2. A wear resistant antimicrobial wrapper for food packaging according to claim 1, wherein the selected dispersant is sodium dodecyl sulfate.
3. The abrasion-resistant and antibacterial wrapping paper for food packaging according to claim 1, wherein the selected abrasion-resistant agent is silica aerogel powder, and the crosslinking agent is dicyclopentadiene sodium diformate.
4. A wear resistant and antibacterial wrapper for food packaging according to claim 1, wherein the selected antioxidant is tea polyphenols.
5. The abrasion resistant and antibacterial wrapper for food packaging according to claim 1, wherein the selected inorganic flame retardant is any one of a proportional mixture of antimony trioxide and magnesium oxide.
6. The abrasion resistant antimicrobial packaging paper for food packaging according to claim 1, wherein the selected antimicrobial agent is silver nanoparticles.
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- 2021-11-05 CN CN202111303971.XA patent/CN113981742B/en active Active
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|---|---|---|---|---|
| CN101349027A (en) * | 2008-09-08 | 2009-01-21 | 曲丰蕴 | Plant primary fiber wrapping paper |
| CN105088855A (en) * | 2015-08-13 | 2015-11-25 | 合肥龙发包装有限公司 | High-temperature-resistant packaging paper |
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