CN111070829A - High-definition CPP (chlorinated Polypropylene) food packaging film and preparation method thereof - Google Patents
High-definition CPP (chlorinated Polypropylene) food packaging film and preparation method thereof Download PDFInfo
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- CN111070829A CN111070829A CN201911377430.4A CN201911377430A CN111070829A CN 111070829 A CN111070829 A CN 111070829A CN 201911377430 A CN201911377430 A CN 201911377430A CN 111070829 A CN111070829 A CN 111070829A
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- 235000013305 food Nutrition 0.000 title claims abstract description 43
- 239000012785 packaging film Substances 0.000 title claims abstract description 34
- 229920006280 packaging film Polymers 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000004743 Polypropylene Substances 0.000 title abstract description 11
- -1 Polypropylene Polymers 0.000 title abstract description 5
- 229920001155 polypropylene Polymers 0.000 title abstract description 5
- 239000010410 layer Substances 0.000 claims abstract description 43
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 18
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 14
- 229920002749 Bacterial cellulose Polymers 0.000 claims description 28
- PTHCMJGKKRQCBF-UHFFFAOYSA-N Cellulose, microcrystalline Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC)C(CO)O1 PTHCMJGKKRQCBF-UHFFFAOYSA-N 0.000 claims description 28
- 239000005016 bacterial cellulose Substances 0.000 claims description 28
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 239000000155 melt Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 claims description 7
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 6
- 241001122767 Theaceae Species 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229940009662 edetate Drugs 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229960003512 nicotinic acid Drugs 0.000 claims description 6
- 235000001968 nicotinic acid Nutrition 0.000 claims description 6
- 239000011664 nicotinic acid Substances 0.000 claims description 6
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 6
- 235000013824 polyphenols Nutrition 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 239000012748 slip agent Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 239000012745 toughening agent Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 241000894006 Bacteria Species 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004519 grease Substances 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 231100000956 nontoxicity Toxicity 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 244000052616 bacterial pathogen Species 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011091 composite packaging material Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 235000021404 traditional food Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
Abstract
The invention discloses a high-definition CPP (chlorinated Polypropylene) food packaging film and a preparation method thereof, belonging to the technical field of food packaging films, and the high-definition CPP food packaging film comprises a heat sealing layer, a supporting layer and a corona layer, wherein the supporting layer is arranged on the lower surface of the heat sealing layer, the corona layer is arranged on the lower surface of the supporting layer, and the thickness of the film formed by the heat sealing layer, the supporting layer and the corona layer is 20-80 mu m. According to the high-definition CPP food packaging film and the preparation method thereof, the antibacterial solution is added in the preparation process, so that excellent definition and smoothness are formed on the film, the longitudinal and transverse properties are uniform, and the high-definition CPP food packaging film has moderate strength and excellent moisture resistance, so that the high-definition CPP food packaging film has good bacteria inhibition effect, can effectively inhibit the propagation of harmful bacteria, prolongs the quality guarantee period of food, and has good heat sealability and excellent heat resistance; the oil resistance and grease resistance are excellent, and the chemical resistance is good; no toxicity, no odor, good sanitary property, low cost and stronger market competitiveness.
Description
Technical Field
The invention belongs to the technical field of food packaging films, and particularly relates to a high-definition CPP (chlorinated Polypropylene) food packaging film and a preparation method thereof.
Background
The CPP film is an unstretched polypropylene film prepared by a tape casting method, and has the characteristics of light weight, high transparency, mechanical adaptability, strong stress, good moisture resistance, good heat resistance and the like. The film is mainly used as a base material and widely applied to composite packaging materials and is compounded with other films. Because of its good heat resistance, it is often used for packaging of steamed foods, which can be classified into a high-temperature steaming grade and a general steaming grade. The high-temperature cooking-grade CPP film is mainly used for being dry-compounded with other films to prepare various packaging bags, and can resist cooking sterilization at the temperature of more than 120 ℃; the common cooking grade CPP film can be boiled and sterilized only at the temperature of below 120 ℃.
Since the introduction and development of the technology began to begin in the 80 s of China, people lacked certain understanding and understanding of the application and processing of CPP films at that time, so that the application of the CPP films was greatly limited. In recent years, with the continuous improvement of food packaging requirements and standards and the further popularization of the application of plastic films in food packaging, people have deeper understanding on cooking-grade CPP films. Wherein the market demand of the cooking grade CPP film with good performance and high quality is in a rapidly increasing state.
At present, meat products, aquatic products, milk products and the like are made from various packaging materials, but the packaging materials cannot store food for a long time, and the food is often not consumed in time after being purchased by consumers and is stored in a refrigerator, so that the food is easily infected again during the storage period of the food, and the body of an eater is uncomfortable, and therefore, a CPP food packaging film capable of inhibiting germs and a preparation method thereof are needed.
Disclosure of Invention
Technical problem to be solved
In order to overcome the defects in the prior art, the invention provides a high-definition CPP food packaging film and a preparation method thereof, and solves the problem that the traditional food packaging film does not inhibit the growth and reproduction of pathogenic bacteria.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the high-definition CPP food packaging film comprises a heat sealing layer, a supporting layer and a corona layer, wherein the supporting layer is arranged on the lower surface of the heat sealing layer, the corona layer is arranged on the lower surface of the supporting layer, the thickness of the film formed by the heat sealing layer, the supporting layer and the corona layer is 20-80 mu m, the heat sealing layer accounts for 15-20% of the film, the supporting layer accounts for 50-70% of the film, and the corona layer accounts for 15-20% of the film.
The heat sealing layer comprises the following components in parts by weight: 100 parts of PP resin and 0.8-1.8 parts of slip agent.
The support layer comprises the following components in parts by weight: 100 parts of PP resin and 5-15 parts of POE and POP compound toughening agent.
The corona layer comprises the following components in parts by weight: 100 parts of PP resin and 0.5-2.0 parts of surfactant.
A preparation method of a high-definition CPP food packaging film comprises the following steps:
s1, antibacterial component: soaking the purified bacterial cellulose gel in an antibacterial solution for 6-24 hours, taking out the bacterial cellulose gel after soaking, washing the bacterial cellulose gel with deionized water, soaking the bacterial cellulose gel in a glycerol solution with the mass concentration of 10-15% for 15-20 minutes, taking out, and drying at a low temperature of 50-70 ℃.
S2, extrusion: raw materials and antibacterial components enter the extruder from a stub bar, the raw materials are conveyed into the heated cylinder under the action of the rotating screw, the raw materials are gradually melted due to the shearing action in the screw in the conveying process, the raw materials are heated and melted more fully when running in the heated cylinder, the melt is gradually extruded by the screw, the melts of the three extruders are converged, the melts are automatically laminated, and the laminated melt flowing in the cylinder is filtered by the filter.
S3, casting quenching: the laminated melt after filtration flows out from the die lip to form a thin and uniform sheet fluid which is quenched and solidified into a film on a cooling roller.
And S4, measuring thickness and defect, adopting β rays to continuously track and measure the thickness and defect of the film, quickly feeding the detected confidence back to extrusion, casting and other related procedures, and quickly and automatically adjusting parameters to keep other related information of the product thickness stable.
S5: trimming and winding; two edges are cut off, so that the thickness of the film becomes more uniform, and the film is rolled by a steel roll core for a rolling machine.
S6: aging and cutting; and (3) placing the rolled film for a set time, aging, and cutting and forming according to a set size to obtain the food packaging film.
As a further scheme of the invention: the purified bacterial cellulose gel is prepared by washing bacterial cellulose gel with deionized water, soaking the bacterial cellulose gel in 0.3-0.41mol/L NaOH solution for 2-5 hours at 60-80 ℃, and repeatedly washing the bacterial cellulose gel with deionized water for 3-5 times until the bacterial cellulose gel is neutral.
As a further scheme of the invention: the antibacterial solution is prepared by dissolving the nicotinic acid, the edetate and the tea polyphenol in 0.005-0.01mol/L of dilute hydrochloric acid solution to prepare the antibacterial solution containing 600-10000IU/ml of the nicotinic acid, the edetate with the mass concentration of 0.15-0.3% and the tea polyphenol with the mass concentration of 0.02-0.1%.
As a further scheme of the invention: the extruder is a double-screw extruder, the head temperature is 120-130 ℃, and the screw rotating speed is 10 r/min.
As a further scheme of the invention: the surface roughness of the cooling roller is not more than 0.15 mm.
(III) advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. according to the high-definition CPP food packaging film and the preparation method thereof, the antibacterial solution is added in the preparation process, so that excellent definition and smoothness are formed on the film, the longitudinal and transverse properties are uniform, and the high-definition CPP food packaging film has moderate strength and excellent moisture resistance, so that the high-definition CPP food packaging film has good bacteria inhibition effect, can effectively inhibit the propagation of harmful bacteria, prolongs the quality guarantee period of food, and has good heat sealability and excellent heat resistance; the oil resistance and grease resistance are excellent, and the chemical resistance is good; no toxicity, no odor, good sanitary property, low cost and stronger market competitiveness.
2. According to the high-definition CPP food packaging film and the preparation method thereof, through formula improvement and process improvement, the wetting tension of the film is improved, the level of inner printing is achieved, the film with low temperature resistance, high transparency and inner printing performance is developed, the application range of the film is expanded, a new variety is increased, the market share of an enterprise is improved, the economic income is increased, and the technical progress of the film packaging industry is promoted.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
The invention provides a technical scheme that: a high-definition CPP food packaging film comprises a heat sealing layer, a supporting layer and a corona layer, wherein the supporting layer is arranged on the lower surface of the heat sealing layer, the corona layer is arranged on the lower surface of the supporting layer, the thickness of the film formed by the heat sealing layer, the supporting layer and the corona layer is 20-80 mu m, the heat sealing layer accounts for 15-20% of the film, the supporting layer accounts for 50-70% of the film, and the corona layer accounts for 15-20% of the film.
The heat sealing layer comprises the following components in parts by weight: 100 parts of PP resin and 0.8-1.8 parts of slip agent.
The support layer comprises the following components in parts by weight: 100 parts of PP resin and 5-15 parts of POE and POP compound toughening agent.
The mass parts of the corona layer are as follows: 100 parts of PP resin and 0.5-2.0 parts of surfactant.
A preparation method of a high-definition CPP food packaging film comprises the following steps:
s1, antibacterial component: soaking the purified bacterial cellulose gel in an antibacterial solution for 6-24 hours, taking out the bacterial cellulose gel after soaking, washing the bacterial cellulose gel with deionized water, soaking the bacterial cellulose gel in a glycerol solution with the mass concentration of 10-15% for 15-20 minutes, taking out, and drying at a low temperature of 50-70 ℃.
S2, extrusion: raw materials and antibacterial components enter the extruder from a stub bar, the raw materials are conveyed into the heated cylinder under the action of the rotating screw, the raw materials are gradually melted due to the shearing action in the screw in the conveying process, the raw materials are heated and melted more fully when running in the heated cylinder, the melt is gradually extruded by the screw, the melts of the three extruders are converged, the melts are automatically laminated, and the laminated melt flowing in the cylinder is filtered by the filter.
S3, casting quenching: the laminated melt after filtration flows out from the die lip to form a thin and uniform sheet fluid which is quenched and solidified into a film on a cooling roller.
And S4, measuring thickness and defect, adopting β rays to continuously track and measure the thickness and defect of the film, quickly feeding the detected confidence back to extrusion, casting and other related procedures, and quickly and automatically adjusting parameters to keep other related information of the product thickness stable.
S5: trimming and winding; two edges are cut off, so that the thickness of the film becomes more uniform, and the film is rolled by a steel roll core for a rolling machine.
S6: aging and cutting; and (3) placing the rolled film for a set time, aging, and cutting and forming according to a set size to obtain the food packaging film.
The purified bacterial cellulose gel is prepared by washing bacterial cellulose gel with deionized water, soaking the bacterial cellulose gel in 0.3-0.41mol/L NaOH solution for 2-5 hours at 60-80 ℃, and repeatedly washing the bacterial cellulose gel with deionized water for 3-5 times until the gel is neutral.
The antibacterial solution is prepared by dissolving nicotinic acid, edetate and tea polyphenol in 0.005-0.01mol/L dilute hydrochloric acid solution to obtain antibacterial solution containing 600-10000IU/ml of nicotinic acid, 0.15-0.3% of edetate and 0.02-0.1% of tea polyphenol.
The extruder is a double-screw extruder, the head temperature is 120-130 ℃, and the screw rotating speed is 10 r/min.
The surface roughness of the cooling roll is not more than 0.15 mm.
By adding the antibacterial solution in the preparation process, excellent definition and finish degree are formed on the film, the longitudinal and transverse properties are uniform, and the film has moderate strength and excellent moisture resistance, so that the film has good bacteria inhibition effect, can effectively inhibit the propagation of harmful bacteria, prolongs the quality guarantee period of food, and has good heat sealability and excellent heat resistance; the oil resistance and grease resistance are excellent, and the chemical resistance is good; no toxicity, no odor, good sanitary property, low cost and stronger market competitiveness.
Through formula improvement and process improvement, the wetting tension of the film is improved, the level of inner printing is achieved, the film with low temperature resistance, high transparency and inner printing performance is developed, the application range of the film is expanded, new varieties are increased, the market share of enterprises is improved, the economic income is increased, and the technical progress of the film packaging industry is promoted.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (6)
1. The utility model provides a high-definition CPP food packaging film, includes heat-seal layer, supporting layer and corona layer, the lower surface on heat-seal layer is provided with the supporting layer, the lower surface on supporting layer is provided with corona layer, the thickness that heat-seal layer, supporting layer and corona layer three constitute the film is 20-80 mu m, heat-seal layer accounts for 15-20% of film, support accounts for 50-70% of film, corona layer accounts for 15-20% of film, its characterized in that:
the heat sealing layer comprises the following components in parts by weight: 100 parts of PP resin and 0.8-1.8 parts of slip agent.
The support layer comprises the following components in parts by weight: 100 parts of PP resin and 5-15 parts of POE and POP compound toughening agent.
The corona layer comprises the following components in parts by weight: 100 parts of PP resin and 0.5-2.0 parts of surfactant.
2. The method for preparing a high definition CPP food packaging film according to claim 1, comprising the steps of:
s1, antibacterial component: soaking the purified bacterial cellulose gel in an antibacterial solution for 6-24 hours, taking out the bacterial cellulose gel after soaking is finished, washing the bacterial cellulose gel by using deionized water, soaking the bacterial cellulose gel in a glycerol solution with the mass concentration of 10-15% for 15-20 minutes, taking out the bacterial cellulose gel, and drying the bacterial cellulose gel at a low temperature of 50-70 ℃;
s2, extrusion: raw materials and antibacterial components enter an extruder from a stub bar, the raw materials are conveyed into a heated cylinder under the action of a rotating screw, the raw materials are gradually melted due to the shearing action in the screw in the conveying process, the raw materials run in the heated cylinder, the heating and melting are more sufficient, melts are gradually extruded by the screw, the melts of three extruders are converged, the melts are automatically laminated, and the laminated melts flowing in the cylinder are filtered by a filter;
s3, casting quenching: filtering the laminated melt, discharging from a die head lip to form a thin and uniform sheet fluid, and quenching and solidifying the sheet fluid on a cooling roller to form a film;
s4, thickness measurement and defect detection, wherein β rays are adopted to continuously track and measure the thickness and the defects of the film, the detected confidence is quickly fed back to extrusion, casting and other relevant processes, and parameters are quickly and automatically adjusted to keep other relevant information of the product thickness stable;
s5: trimming and winding; cutting off two edges to enable the thickness of the film to be more uniform, and winding the film by using a steel winding core;
s6: aging and cutting; and (3) placing the rolled film for a set time, aging, and cutting and forming according to a set size to obtain the food packaging film.
3. The high-definition CPP food packaging film and the preparation method thereof according to claim 1, wherein the high-definition CPP food packaging film comprises the following components in percentage by weight: the purified bacterial cellulose gel is prepared by washing bacterial cellulose gel with deionized water, soaking the bacterial cellulose gel in 0.3-0.41mol/L NaOH solution for 2-5 hours at 60-80 ℃, and repeatedly washing the bacterial cellulose gel with deionized water for 3-5 times until the bacterial cellulose gel is neutral.
4. The high-definition CPP food packaging film and the preparation method thereof according to claim 1, wherein the high-definition CPP food packaging film comprises the following components in percentage by weight: the antibacterial solution is prepared by dissolving the nicotinic acid, the edetate and the tea polyphenol in 0.005-0.01mol/L of dilute hydrochloric acid solution to prepare the antibacterial solution containing 600-10000IU/ml of the nicotinic acid, the edetate with the mass concentration of 0.15-0.3% and the tea polyphenol with the mass concentration of 0.02-0.1%.
5. The high-definition CPP food packaging film and the preparation method thereof according to claim 1, wherein the high-definition CPP food packaging film comprises the following components in percentage by weight: the extruder is a double-screw extruder, the head temperature is 120-130 ℃, and the screw rotating speed is 10 r/min.
6. The high-definition CPP food packaging film and the preparation method thereof according to claim 1, wherein the high-definition CPP food packaging film comprises the following components in percentage by weight: the surface roughness of the cooling roller is not more than 0.15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377430.4A CN111070829A (en) | 2019-12-27 | 2019-12-27 | High-definition CPP (chlorinated Polypropylene) food packaging film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911377430.4A CN111070829A (en) | 2019-12-27 | 2019-12-27 | High-definition CPP (chlorinated Polypropylene) food packaging film and preparation method thereof |
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| CN102212209A (en) * | 2011-04-29 | 2011-10-12 | 钟春燕 | Packaging film for refrigerated foods and preparation method thereof |
| CN205413471U (en) * | 2015-12-15 | 2016-08-03 | 津泽塑料实业（天津）有限公司 | Antibiotic polyethylene film's manufacture equipment |
| CN108357174A (en) * | 2017-12-28 | 2018-08-03 | 安徽双津实业有限公司 | A kind of oxygen uptake active packing boiling film |
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2019
- 2019-12-27 CN CN201911377430.4A patent/CN111070829A/en active Pending
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|---|---|---|---|---|
| CN101798425A (en) * | 2010-04-08 | 2010-08-11 | 福州佳通第一塑料有限公司 | Low temperature resistant high-transparency CPP packaging film capable of printing internally |
| CN102212209A (en) * | 2011-04-29 | 2011-10-12 | 钟春燕 | Packaging film for refrigerated foods and preparation method thereof |
| CN205413471U (en) * | 2015-12-15 | 2016-08-03 | 津泽塑料实业（天津）有限公司 | Antibiotic polyethylene film's manufacture equipment |
| CN108357174A (en) * | 2017-12-28 | 2018-08-03 | 安徽双津实业有限公司 | A kind of oxygen uptake active packing boiling film |
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