CN114771064B - High-low temperature resistant non-deformable packaging film and preparation method thereof - Google Patents
High-low temperature resistant non-deformable packaging film and preparation method thereof Download PDFInfo
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- CN114771064B CN114771064B CN202210360507.2A CN202210360507A CN114771064B CN 114771064 B CN114771064 B CN 114771064B CN 202210360507 A CN202210360507 A CN 202210360507A CN 114771064 B CN114771064 B CN 114771064B
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- 239000012785 packaging film Substances 0.000 title claims abstract description 70
- 229920006280 packaging film Polymers 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 120
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims abstract description 47
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims abstract description 47
- 239000011229 interlayer Substances 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 238000003851 corona treatment Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000013329 compounding Methods 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 2
- 230000001954 sterilising effect Effects 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 238000002834 transmittance Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 5
- 238000010025 steaming Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- 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
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
-
- 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
- B32B2439/00—Containers; Receptacles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses a novel high-low temperature resistant non-deformable packaging film and a preparation method thereof, wherein the novel high-low temperature resistant non-deformable packaging film comprises: the BOPP layer is an outer layer film of the packaging film; an ALOX PET layer which is an interlayer film of the packaging film; the PE layer is an inner layer film of the packaging film; BOPP layer, ALOXPET layers and PE layer are laminated in proper order from outside to inside. The novel high-low temperature resistant non-deforming packaging film can be steamed and boiled in water bath at 85 ℃ for 30min, then cooled to 0 ℃ rapidly, the original shape of the packaging film is not changed, the oxygen transmittance is less than or equal to 2 percent at (23 ℃) (cm < 3/(. Square meter for 24 h)), and the water vapor transmittance is less than or equal to 1 percent at (38 ℃), 90%RH) g/(. Square meter for 24 h). Can be cooled and refrigerated rapidly without changing shape after high temperature steaming and sterilizing, and meets the requirements of beautiful appearance, shelf life and convenient storage and transportation.
Description
Technical Field
The application relates to the technical field of packaging materials, in particular to a novel high-low temperature resistant non-deformable packaging film and a preparation method thereof.
Background
Packaging films are of a large variety of products, and among them, plastic packaging films for food grade are widely used.
The plastic packaging film in the traditional market has the problem of easy deformation at high temperature, and has serious restrictions on the aesthetic degree of the product and the control of microorganisms of the product. Moreover, because the surface hardness of the container is low, the container is easy to wear or scratch, the stability of product transportation, whether consumers can eat or not, and the like are all the same with serious potential safety hazard problems.
In addition, the packaging film has strong restrictions on the shelf life, storage conditions, transportation radius and the like of the product due to poor light and oxygen blocking performance.
Therefore, there is an urgent need to develop a novel packaging film which can withstand high and low temperatures and is not deformed.
Disclosure of Invention
The application mainly aims to provide a novel high-low temperature resistant non-deformable packaging film and a preparation method thereof, so as to solve the problem of rapid cooling and refrigeration without shape change after high-temperature cooking sterilization and meet the requirements of beautiful appearance, shelf life and convenient storage and transportation of products.
In order to achieve the above object, the present application provides the following techniques:
the first aspect of the application provides a novel high-low temperature resistant non-deformable packaging film, comprising:
The BOPP layer is an outer layer film of the packaging film;
an ALOX PET layer which is an interlayer film of the packaging film;
the PE layer is an inner layer film of the packaging film;
the BOPP layer, the ALOX PET layer and the PE layer are sequentially attached from outside to inside.
As an optional embodiment of the present application, the thickness adding amounts of the BOPP layer, the ALOX PET layer and the PE layer are, optionally, respectively as follows:
The BOPP layer has the following ratio: 28-30%;
the ALOX PET layer has the following ratio: 12-13%;
the PE layer has the following ratio: 50-51%.
As an optional embodiment of the present application, the thickness of BOPP layer, ALOX PET layer and PE layer is optionally:
The thickness of the BOPP layer is as follows: 28.2 μm;
the thickness of the ALOX PET layer is as follows: 12.61 μm;
The thickness of the PE layer is as follows: 50.46 μm.
The second aspect of the application provides a method for preparing the novel high-low temperature resistant non-deformable packaging film, which comprises the following steps:
S1, carrying out corona treatment on raw materials of a BOPP layer;
S2, coating the BOPP layer subjected to corona treatment in the step S1 with an AC agent, and drying under a first temperature condition;
S3, extruding an amorphous film from the BOPP layer coated with the AC agent and the ALOX PET layer subjected to plasticizing treatment in the step S2 through a T-shaped film in an extruder at a second temperature, and performing first compounding to obtain a binary compound;
s4, coating an AC agent on the binary compound, and drying at a third temperature;
S5, extruding the amorphous film from the binary compound coated with the AC agent and the plasticized resin PE prepared in the step S4 through a T-shaped film in an extruder under the fourth temperature condition, and performing secondary compounding;
s6, curing the secondary composite amorphous film at a fifth temperature to obtain the novel high-low temperature resistant non-deformable packaging film.
As an optional embodiment of the present application, optionally, in step S1, after subjecting the raw material of the BOPP layer to corona treatment, the method further includes:
And printing character information on the corona surface subjected to corona treatment according to the preset character information.
As an alternative embodiment of the present application, optionally, in step S2 and step S4, the conditions for using the AC agent are: the solid content of the solution is 5-10%, and the coating amount is 0.03-0.6 g/m.
As an alternative embodiment of the present application, optionally, in step S2, the first temperature condition is: 50-80 ℃; in step S4, the third temperature condition is: 50-80 ℃.
As an optional embodiment of the present application, optionally, in step S3, the method for preparing the ALOX PET layer includes:
melting and evaporating aluminum metal at 1100-1200deg.C under high vacuum to deposit aluminum vapor on the extruded PET, and plasticizing to obtain ALOX PET.
As an alternative embodiment of the present application, optionally, in step S3, the second temperature condition is: 260-280 ℃; in step S5, the fourth temperature condition is: 140-220 ℃.
As an alternative embodiment of the present application, optionally, in step S6, the fifth temperature condition is: 50-60 ℃ for 48 hours.
Compared with the prior art, the application can bring the following technical effects:
The novel high-low temperature resistant non-deformable packaging film prepared by the application can be used for high-temperature sterilization and low-temperature refrigeration and is non-deformable. The novel high-low temperature resistant non-deformable packaging film includes: the BOPP layer is an outer layer film of the packaging film; an ALOX PET layer which is an interlayer film of the packaging film; the PE layer is an inner layer film of the packaging film; the BOPP layer, the ALOX PET layer and the PE layer are sequentially attached from outside to inside. The novel high-low temperature resistant non-deforming packaging film can be steamed and boiled in a water bath at 85 ℃ for 30min, then cooled to 0 ℃ rapidly, the original shape of the packaging film is not changed, the oxygen transmittance is less than or equal to 2 percent at (23 ℃) (cm/(. Square meter 24 h)), and the water vapor transmittance is less than or equal to 1 percent at (38 ℃), 90%RH) g/(. Square meter 24 h). Can be cooled and refrigerated rapidly without changing shape after high temperature steaming and sterilizing, and meets the requirements of beautiful appearance, shelf life and convenient storage and transportation. Meanwhile, the glass has the performances of attractive appearance, hardness, transparency, oxygen permeability, practicability and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
FIG. 1 is a schematic cross-sectional structure of a novel high and low temperature resistant non-deformable packaging film of the present invention;
FIG. 2 is a schematic diagram of the preparation flow of the novel high and low temperature resistant non-deformable packaging film.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
The first aspect of the application provides a novel high-low temperature resistant non-deformable packaging film, comprising:
The BOPP layer is an outer layer film of the packaging film;
an ALOX PET layer which is an interlayer film of the packaging film;
the PE layer is an inner layer film of the packaging film;
the BOPP layer, the ALOX PET layer and the PE layer are sequentially attached from outside to inside.
As shown in figure 1, the novel packaging film for high-temperature sterilization and low-temperature refrigeration, provided by the application, is formed by sequentially compounding a first BOPP layer, a second ALOX PET layer and a third PE layer from outside to inside. The ALOX PET layer is arranged between the BOPP layer and the PE layer and is clamped at the middle position.
The BOPP layer provides stretching property for the packaging film; the ALOX PET layer provides rigidity to the packaging film; the PE layer provides food safety assurance for the packaging film and meets the requirements of the sanitation standard of the material contacting food.
The ALOX PET layer is prepared by melting and evaporating metallic aluminum through high temperature of 1100-1200 ℃ under high vacuum state of ALOX, depositing vapor deposition of aluminum on extruded PET, and plasticizing.
At present, more BOPP, AL, ALOX PET, PE and other composite plastic materials are available on the market, but the packaging is easy to deform under high-temperature and low-temperature environments, and the packaging film performance is very low, and cannot have the performances of beauty, hardness, transparency, oxygen permeability, practicability and the like.
The application aims to solve the problem that the shape is not changed after the high-temperature steaming and sterilizing and the cooling and refrigerating are carried out rapidly, meets the requirements of beautiful appearance, shelf life and convenient storage and transportation of products, and is a special material composition and a special adding proportion of a packaging film.
As an optional embodiment of the present application, the thickness adding amounts of the BOPP layer, the ALOX PET layer and the PE layer are, optionally, respectively as follows:
The BOPP layer has the following ratio: 28-30%;
the ALOX PET layer has the following ratio: 12-13%;
the PE layer has the following ratio: 50-51%.
As a preferable scheme, the packaging film is formed by compounding 30% of BOPP material providing stretching performance and 12% of ALOX PET material providing hardness, 50% of PE material providing food safety, and the specific adding proportion of the packaging film not only maintains the stretching performance of the film, but also maintains the hardness to play a synergistic effect.
The following is a comparative table of the packaging film of the present application and two commercially available packaging materials:
From the above table, it can be seen that: the existing packages in the market are made of BOPP, AL, ALOX PET, PE and other composite plastic materials, the service performance is poor, good stability cannot be maintained at high temperature or low temperature, and the package is easy to deform.
The novel high-low temperature resistant non-deformable packaging film formed by specific materials and specific addition proportion provided by the application comprises the following BOPP layers in percentage: 28-30%; the ALOX PET layer has the following ratio: 12-13%; the PE layer has the following ratio: 50-51% ", can cook in 85 ℃ water bath for 30min, then cool to 0 ℃ rapidly, the packaging film does not change the original shape, the oxygen transmittance is less than or equal to 2 percent (23 ℃) (cm/(squaremeter 24 h)), the water vapor transmittance is less than or equal to 1 percent (38 ℃), and the g/((90%RH) 24 h)) detection value. Meanwhile, the glass has the performances of attractive appearance, hardness, transparency, oxygen permeability, practicability and the like.
A composition structure of the present application having the best performance in thickness will be given below.
As an optional embodiment of the present application, the thickness of BOPP layer, ALOX PET layer and PE layer is optionally:
The thickness of the BOPP layer is as follows: 28.2 μm;
the thickness of the ALOX PET layer is as follows: 12.61 μm;
The thickness of the PE layer is as follows: 50.46 μm.
In this example, one of the preferred embodiments is: the first layer is BOPP layer with thickness of 28.2 μm, and has the advantages of stretching resistance, high temperature resistance and easy printing; the second layer is an ALOX PET layer with the thickness of 12.61 mu m, and has the characteristics of stretch resistance, high temperature resistance and high barrier property; the third layer is PE film with thickness of 50.46 μm meeting the requirements of food material sanitation standard.
When the novel packaging film is used for high-temperature sterilization and low-temperature refrigeration, the novel packaging film can be flexibly sized according to the product requirements, or the novel packaging film can be directly provided for a user to use.
Example 2
A method for preparing the novel high-low temperature resistant non-deformable packaging film is provided below to prepare the product in example 1.
The second aspect of the application provides a method for preparing the novel high-low temperature resistant non-deformable packaging film, which comprises the following steps:
S1, carrying out corona treatment on raw materials of a BOPP layer;
Firstly, the BOPP film raw material of the outermost layer is subjected to corona treatment to break chemical bonds of plastic molecules to degrade, so that the surface roughness and the surface area are increased.
As an optional embodiment of the present application, optionally, in step S1, after subjecting the raw material of the BOPP layer to corona treatment, the method further includes: and printing character information on the corona surface subjected to corona treatment according to the preset character information.
After the BOPP film raw material is subjected to corona treatment, the roughness and the surface area of the surface are increased, so that character information can be printed conveniently, and the corona treatment device consists of an electrode, a high potentiometer and a silica gel roller, and when voltage passes through an air gap of 25w, continuous discharge can be generated. The text information is preset and set by a user or in a customized mode.
S2, coating the BOPP layer subjected to corona treatment in the step S1 with an AC agent, and drying under a first temperature condition;
The BOPP layer subjected to corona treatment in the step S1 is coated with an AC agent, so that the firmness of the BOPP layer is improved. And then the solvent is volatilized after the drying temperature is 50-80 ℃, so that the semisolid adhesive with the real adhesive effect is left. The first temperature condition is: 50-80 ℃.
S3, extruding an amorphous film from the BOPP layer coated with the AC agent and the ALOX PET layer subjected to plasticizing treatment in the step S2 through a T-shaped film in an extruder at a second temperature, and performing first compounding to obtain a binary compound;
extruding an amorphous film with the plasticized ALOX PET in an extruder through a T-shaped film under the condition that the semi-solid adhesive is in a dry state, and then compounding for the first time to obtain a binary compound.
The second temperature condition is: 260-280 ℃.
The preparation method of the ALOX PET comprises the following steps:
As an optional embodiment of the present application, optionally, in step S3, the method for preparing the ALOX PET layer includes: melting and evaporating aluminum metal at 1100-1200deg.C under high vacuum to deposit aluminum vapor on the extruded PET, and plasticizing to obtain ALOX PET.
S4, coating an AC agent on the binary compound, and drying at a third temperature;
The first composite binary compound is coated with an AC agent by adopting a smooth roll, the solid content of the solution is 5% -10%, the coating amount is 0.03-0.6g/m, the firmness is improved, then the solvent is volatilized by drying treatment, and a semisolid adhesive which really plays a role in adhesion is left, wherein the semisolid adhesive is in a dry state. The third temperature condition is: 50-80 ℃.
S5, extruding the amorphous film from the binary compound coated with the AC agent and the plasticized resin PE prepared in the step S4 through a T-shaped film in an extruder under the fourth temperature condition, and performing secondary compounding;
In the "dry" state, the resin PE which is plasticized by extrusion and extrusion is subjected to secondary compounding after extruding an amorphous film through a T-line film in an extruder. The fourth temperature condition is: 140-220 ℃.
S6, curing the secondary composite amorphous film at a fifth temperature to obtain the novel high-low temperature resistant non-deformable packaging film.
The fifth temperature condition is: 50-60 ℃ for 48 hours.
And curing the film after secondary compounding to obtain the novel high-low temperature resistant non-deforming packaging film.
As an alternative embodiment of the present application, optionally, in step S2 and step S4, the conditions for using the AC agent are: the solid content of the solution is 5-10%, and the coating amount is 0.03-0.6 g/m.
The novel high-low temperature resistant non-deformable packaging film prepared by the preparation steps is formed by combining three layers, wherein the first layer is a BOPP layer, the thickness of the BOPP layer is 28.2 mu m, and the novel high-low temperature resistant non-deformable packaging film has the characteristics of stretch resistance, high temperature resistance and easiness in printing; the second layer is an ALOX PET layer with the thickness of 12.61 mu m, and has the characteristics of stretch resistance, high temperature resistance and high barrier property; the third layer is PE film with thickness of 50.46 μm meeting the requirements of food material sanitation standard.
The thickness of the adhesive layer of the composite three-layer material such as AC agent is not described in this embodiment.
In a specific embodiment, as long as the novel high-low temperature resistant non-deforming packaging film is formed by the following ratio of the BOPP layer: 28-30%; the ALOX PET layer has the following ratio: 12-13%; the PE layer has the following ratio: 50-51% "apart from the above preferred thickness values, different feasibility scheme selections may be made depending on the chemical raw materials such as AC agent chosen for replacement in the manufacturing process flow and the manufacturing method of the selected manufacturing process such as ALOX PET.
The use of an extruder, which is merely one option for one of the extrusion devices of the present embodiment, is not meant to be limiting as to the use of an extruder alone.
When the novel packaging film is used for high-temperature sterilization and low-temperature refrigeration, the novel packaging film can be flexibly sized according to the product requirements, or the novel packaging film can be directly provided for a user to use.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. A high and low temperature resistant non-deformable packaging film comprising:
The BOPP layer is an outer layer film of the packaging film;
ALOx PET layers which are interlayer films of the packaging film;
the PE layer is an inner layer film of the packaging film;
the BOPP layer, the ALOx PET layer and the PE layer are sequentially laminated from outside to inside;
The thicknesses of the BOPP layer, the ALOx PET layer and the PE layer are respectively as follows:
The thickness of the BOPP layer is as follows: 28.2 μm;
the ALOx PET layers have the thickness of: 12.61 μm;
The thickness of the PE layer is as follows: 50.46 μm;
The preparation method of the high-low temperature resistant non-deformable packaging film comprises the following steps:
S1, carrying out corona treatment on raw materials of a BOPP layer;
S2, coating the BOPP layer subjected to corona treatment in the step S1 with an AC agent, and drying under a first temperature condition;
s3, extruding the BOPP layer coated with the AC agent and the ALOx PET layer subjected to plasticizing treatment in the step S2 into an amorphous film through a T-shaped film in an extruder at a second temperature, and performing first compounding to obtain a binary compound;
s4, coating an AC agent on the binary compound, and drying at a third temperature;
S5, extruding the amorphous film from the binary compound coated with the AC agent and the plasticized resin PE prepared in the step S4 through a T-shaped film in an extruder under the fourth temperature condition, and performing secondary compounding;
The use conditions of the AC agent are as follows: the solid content of the solution is 5-10%, and the coating amount is 0.03-0.6g/m 2;
s6, curing the secondary composite amorphous film at a fifth temperature to obtain the high-temperature and low-temperature resistant non-deformable packaging film.
2. The high and low temperature resistant non-deformable packaging film of claim 1, wherein in step S1, after subjecting the BOPP layer raw material to corona treatment, further comprising:
And printing character information on the corona surface subjected to corona treatment according to the preset character information.
3. The high and low temperature resistant non-deformable packaging film of claim 1, wherein in step S2, the first temperature condition is: 50-80 ℃; in step S4, the third temperature condition is: 50-80 ℃.
4. The high and low temperature resistant non-deformable packaging film of claim 1, wherein in step S3, the ALOx PET layers are prepared by the following method:
and melting and evaporating ALOx metallic aluminum at a high temperature of 1100-1200 ℃ under a high vacuum state, depositing aluminum vapor on the extruded PET, and plasticizing to obtain ALOx PET.
5. The high and low temperature resistant non-deformable packaging film of claim 1, wherein in step S3, the second temperature condition is: 260-280 ℃; in step S5, the fourth temperature condition is: 140-220 ℃.
6. The high and low temperature resistant non-deformable packaging film of claim 1 wherein in step S6, the fifth temperature condition is: 50-60 ℃ for 48 hours.
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| CN111516335A (en) * | 2020-04-22 | 2020-08-11 | 江阴宝柏包装有限公司 | High-temperature-digestion packaging film with high solvent resistance and low precipitation |
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| JP5047678B2 (en) * | 2007-04-26 | 2012-10-10 | トーホー加工株式会社 | Packaging material having aluminum vapor deposition film and packaging bag using the same |
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| CN206217302U (en) * | 2016-11-24 | 2017-06-06 | 湖北宏裕新型包材股份有限公司 | Transparent boiling level composite package film |
| CN107310237A (en) * | 2017-06-15 | 2017-11-03 | 东莞市华源包装股份有限公司 | A kind of production technology of aluminized complex film and products thereof |
| CN108673989A (en) * | 2018-05-21 | 2018-10-19 | 黄山永新股份有限公司 | A kind of high-barrier transparency film and its production method suitable for High-Speed Automatic packaging |
| CN114193879B (en) * | 2021-11-24 | 2023-07-07 | 成都众恒印务有限责任公司 | High-barrier aluminized composite film and preparation method thereof |
| CN114274636B (en) * | 2021-12-31 | 2023-09-19 | 青岛东海包装产业有限公司 | High-heat-resistance high-low-temperature toughness plastic film and preparation method thereof |
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| CN103287019A (en) * | 2013-05-29 | 2013-09-11 | 黄山永新股份有限公司 | Plateau bag packaging film and production process thereof |
| CN111516335A (en) * | 2020-04-22 | 2020-08-11 | 江阴宝柏包装有限公司 | High-temperature-digestion packaging film with high solvent resistance and low precipitation |
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