CN116176087B - Packaging film material with high antibacterial and high barrier properties, preparation method and application - Google Patents

Packaging film material with high antibacterial and high barrier properties, preparation method and application Download PDF

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Publication number
CN116176087B
CN116176087B CN202310464342.8A CN202310464342A CN116176087B CN 116176087 B CN116176087 B CN 116176087B CN 202310464342 A CN202310464342 A CN 202310464342A CN 116176087 B CN116176087 B CN 116176087B
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layer
film
thickness
aluminum foil
barrier
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CN116176087A (en
Inventor
孙忠杰
汪立辉
薛亚涛
边浩亮
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Ningbo Times Aluminium Foil Technology Corp ltd
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Ningbo Times Aluminium Foil Technology Corp ltd
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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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/09—Layered products comprising a layer of metal comprising metal 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 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C23C14/08—Oxides
    • C23C14/081—Oxides of aluminium, magnesium or beryllium
    • 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
    • C23C14/34—Sputtering
    • C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • 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
    • B32B2307/554—Wear resistance
    • 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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • 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 belongs to the technical field of layered packaging film materials, and particularly relates to a packaging film material with high antibacterial and high barrier properties, a preparation method and application thereof. By arranging an aluminum foil layer, a barrier layer and a protective layer, and arranging the barrier layer into an Al film layer and Al 2 O 3 The laminated circulation structure of the film layer improves the oxygen and water resistance, the antibacterial and bacteriostatic properties and the shock resistance of the packaging film material.

Description

Packaging film material with high antibacterial and high barrier properties, preparation method and application
Technical Field
The invention relates to the technical field of layered packaging film materials, in particular to a packaging film material with high antibacterial and high barrier properties, a preparation method and application thereof.
Background
The food is taken as an indispensable living material in daily life of human beings, and is difficult to store safely for a long time due to the characteristic of being beneficial to the breeding and reproduction of bacteria. On the one hand, the treatment of waste food exceeding the shelf life, which results in a great waste of food resources, becomes a serious social problem facing humans; on the other hand, bacterial contamination of food products also directly leads to a large spread of the disease. Therefore, how to safely and efficiently preserve food has been the subject of continuous research. Traditional food packaging material adopts materials such as aluminium foil, plastics, through setting up multiple functional layer, like barrier layer, additional functional layer such as impact resistance layer promote food packaging material's barrier property and barrier property, stop inside the gas invasion food package that gas such as oxygen, steam are unfavorable for food preservation through food packaging material to improve the quality of food's preservation, prolonged the life of food preservation. With the continuous improvement of the life quality of people, the barrier property of the food packaging material in the prior art to oxygen and water vapor can not provide better barrier property and antibacterial property, and can not meet the diversified demands of food preservation.
The aluminum oxide film layer is a film layer material with a blocking function commonly used in the field of packaging films, has transparent visibility, can be used for microwave heating, and has wide application in the field of food packaging films. The aluminum oxide film layer has the advantages that the film layer is harder, has larger stress, is easy to have the defect of crack and gap, and is not resistant to steaming, so that the application of the aluminum oxide film layer in the field of high-end packaging films is limited.
Thus, there is a need for a solution to the technical problems of the prior art.
Disclosure of Invention
The invention provides a packaging film material with high antibacterial and high barrier properties, a preparation method and application thereof, and at least can solve part of problems in the prior art.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
the packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer, an aluminum foil layer, a base material layer, a barrier layer and a protective layer which are sequentially laminated from inside to outside;
the barrier layer is formed by circularly laminating at least two sub-film layer pairs, and each sub-film layer pair consists of an Al film layer and Al 2 O 3 The membrane layer is formed by a plurality of layers,the Al film layer is contacted with the substrate layer, the thickness of the single-layer Al film layer is 50-100 nanometers, and the single-layer Al film layer is 2 O 3 The thickness of the film layer is 100-200 nanometers, and the thickness of the barrier layer is 300 nanometers to 3 micrometers.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the sub-film layer pair is prepared by a magnetron sputtering method.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the heat sealing layer is a polyethylene resin layer or a polypropylene resin layer.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the aluminum foil layer is doped with 0.5-2.0wt% of Fe, 0.2-1.0wt% of Si and 0.5-4.0wt% of Cu and/or Ag.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the substrate layer is PP, PE or PET.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the protective layer is a water-based polyurethane coating, and a fluororesin hydrophobic material, nano antibacterial powder and nylon are added in the coating.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: the nano antibacterial powder is anatase nano titanium oxide powder or nano zinc oxide powder.
As a preferable scheme of the packaging film material with high antibacterial and high barrier properties, the invention comprises the following steps: and an adhesive layer is further arranged between the heat sealing layer and the aluminum foil layer, between the aluminum foil layer and the base material layer, and between the barrier layer and the protective layer, and the adhesive material for preparing the adhesive layer comprises polyester polyol and triisocyanate with the number average molecular weight of 3000-6000.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
a preparation method of a packaging film material with high antibacterial and high barrier properties is characterized by comprising the following steps: the method comprises the following steps of:
s1: sequentially bonding and manufacturing an aluminum foil layer and a heat sealing layer on one side of the substrate layer;
s2: preparing a barrier layer and a protective layer on the other side of the substrate layer in sequence, wherein the barrier layer comprises an Al film layer and Al 2 O 3 The film layer is prepared by a magnetron sputtering method.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
the application of packaging film material with high antibacterial and high barrier properties in food packaging and medicine packaging is provided.
The beneficial effects of the invention are as follows:
1. the packaging film material with high antibacterial and high barrier properties is provided with the Al/Al with high barrier properties 2 O 3 The aluminum oxide has good barrier property, and the aluminum plating film is a commonly used barrier film layer in the packaging film material field, has good barrier property, can reflect infrared rays and ultraviolet rays, and has good reflection function to Al/Al 2 O 3 The circulating composite membrane layer structure of the (B) can enable the two to cooperatively exert the barrier property. Because the porosity in the membrane layers of different materials is different, the separation membrane layers of two different materials are mutually overlapped, so that the pores in the whole separation layer can not be communicated through, and the separation effect of the membrane layers on water vapor and oxygen is further improved.
Because the metallic aluminum has softer texture, the stress in the aluminizer is very low, and Al/Al is used 2 O 3 The circulating composite film layer structure can exert the adhesive property of the aluminum plating film and eliminate the film layer stress, avoid cracks in the barrier layer caused by the stress generated in the deposition process of the aluminum oxide film layer, and further improve the barrier property and stability of the packaging film material.
The aluminum oxide material also has good high-temperature stability and wear resistance, and can reduce the wear condition of the packaging film material in the process of being used as an outer packaging film layer.
2. The aluminum foil layer arranged in the packaging film material with high antibacterial and high barrier properties contains the additive elements, the addition of the iron element and the silicon element is beneficial to improving the pinhole corrosion resistance of the aluminum foil layer and the extensibility of the aluminum foil, copper and/or silver elements are added to enable copper-rich and/or silver-rich metal phases to be dispersed in the aluminum foil, and metal copper and/or silver atoms can provide good antibacterial and bacteriostatic properties, and particularly have good inhibition effects on staphylococcus aureus and escherichia coli.
3. The protective layer arranged in the packaging film material with high antibacterial and high barrier properties is added with the hydrophobic material, the nano antibacterial powder material and the impact resistant material, the nano titanium oxide and the nano zinc oxide have the effect of killing bacteria attached to the surface of the packaging film material through photocatalysis, and the aluminum foil layer and the Al film layer in the barrier layer also have good reflection function on sunlight, so that the photocatalysis effect of the nano antibacterial powder is improved after the sunlight is reflected, and the antibacterial and bacteriostatic effects of the packaging film material are further improved; the preservation quality of foods and medicines is improved by endowing the packaging film material with a hydrophobic effect, and the storage effect and the storage quality of the foods and medicines in the transportation process are improved.
4. The adhesive material provided by the invention has excellent adhesive adhesion strength and good barrier property and ductility, so that the packaging film material has a stable structure and more excellent barrier property.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a packaging film material with high antibacterial and high barrier properties according to the present invention;
reference numerals illustrate:
1-heat seal layer, 2-aluminum foil layer, 3-substrate layer, 4-barrier layer, 4-1-Al film layer, 4-2-Al 2 O 3 Film layer, 5-protective layer.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a packaging film material with high antibacterial and high barrier properties, a preparation method and application thereof, wherein an aluminum foil layer, a barrier layer and a protective layer are arrangedProviding a barrier layer as an Al film layer and Al with multiple cycles 2 O 3 The film layer structure improves the oxygen and water resistance, the antibacterial and bacteriostatic performance and the shock resistance of the packaging film material, thereby improving the preservation life and the preservation quality of foods and medicines.
The packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer, an aluminum foil layer, a base material layer, a barrier layer and a protective layer which are sequentially laminated from inside to outside;
the barrier layer is formed by circularly laminating at least two sub-film layer pairs, and each sub-film layer pair consists of an Al film layer and Al 2 O 3 The Al film layer is in contact with the base material layer.
Preferably, the sub-film layer pair is prepared by a magnetron sputtering method, and a pure aluminum target and an oxygen-containing process gas are adopted in the sputtering process.
Preferably, the thickness of the single Al film layer is 50-100 nanometers, and the single Al film layer 2 O 3 The thickness of the film layer is 100-200 nanometers, and the thickness of the barrier layer is 300 nanometers to 3 micrometers.
Preferably, the heat-sealing layer is a polyethylene resin layer or a polypropylene resin layer.
Preferably, the heat-seal layer is made of a low-density polyethylene resin material or a low-density polypropylene resin material.
Preferably, the thickness of the heat seal layer is 40-100 micrometers, and the thickness of the heat seal layer can be adjusted according to the requirement of heat seal strength.
Preferably, the aluminum foil layer is doped with 0.5-2.0wt% of Fe, 0.2-1.0wt% of Si, and 0.5-4.0wt% of Cu and/or Ag.
The addition of the iron element and the silicon element is beneficial to improving the pinhole corrosion resistance of the aluminum foil layer and the extensibility of the aluminum foil, and the copper and/or silver element is added to ensure that copper-rich and/or silver-rich metal phases are dispersed in the aluminum foil, so that metal copper and/or silver atoms can provide good antibacterial and bacteriostatic properties, and particularly have good inhibition effects on staphylococcus aureus and escherichia coli.
Preferably, the thickness of the aluminum foil layer is 8-20 micrometers, and the aluminum foil cannot play a good role in blocking and supporting due to excessive thickness, so that the production cost is not controlled.
Preferably, the substrate layer is PE, PP or PET.
Preferably, the thickness of the substrate layer is 20-80 microns.
Preferably, the protective layer is a water-based polyurethane coating, and a fluororesin hydrophobic material, nano antibacterial powder and nylon are added in the coating.
Preferably, the fluororesin hydrophobic material in the protective layer is selected from polytetrafluoroethylene and polytrifluoroethylene, and the content of the fluororesin hydrophobic material in the protective layer is 10-20wt%.
Preferably, the nano antibacterial powder is anatase type nano titanium oxide powder or nano zinc oxide powder, and the content of the nano antibacterial powder in the protective layer is 5-10wt%.
Preferably, the nylon, which plays a role in impact resistance, is contained in the protective layer in an amount of 4-8wt%.
Preferably, the thickness of the protective layer is 8-20 microns.
Preferably, an adhesive layer is further arranged between the heat sealing layer and the aluminum foil layer, between the aluminum foil layer and the base material layer, and between the barrier layer and the protective layer, and the adhesive material for preparing the adhesive layer comprises polyester polyol and triisocyanate with the number average molecular weight of 3000-6000.
Preferably, the adhesive may further comprise at least one of a coupling agent, a leveling agent, a defoaming agent, an organic solvent, a filler, and a pigment.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
a preparation method of a packaging film material with high antibacterial and high barrier properties comprises the following steps:
s1: sequentially bonding and manufacturing an aluminum foil layer and a heat sealing layer on one side of the substrate layer;
s2: preparing a barrier layer and a protective layer on the other side of the substrate layer in sequence, wherein the barrier layer comprises an Al film layer and Al 2 O 3 The film layer is prepared by a magnetron sputtering method.
Preferably, the substrate layer is subjected to ion etching in advance before the preparation of the barrier layer, so that the bonding adhesion strength between the subsequent barrier layer and the protective layer and the substrate layer is improved.
Preferably, after each sub-film layer is prepared, the sub-film layer is subjected to ion etching, so that the bonding strength of the whole barrier layer is improved.
Preferably, the gas used for ion etching is helium or argon.
Preferably, the substrate layer is corona treated in advance before the aluminum foil layer is manufactured.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
the application of packaging film material with high antibacterial and high barrier properties in food packaging and medicine packaging is provided.
Example 1
The packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside, as shown in figure 1;
the heat sealing layer 1 is made of low-density polypropylene resin material and has a thickness of 60 micrometers.
The aluminum foil layer 2 contained 1.5wt% of Fe, 0.6wt% of Si, 1.0wt% of Ag, and had a thickness of 12. Mu.m.
The substrate layer 3 is a PP film layer with a thickness of 80 microns.
The barrier layer 4 comprises eight pairs of sub-layers of cyclic structure, each of which has a thickness of 100 nm for the Al film layer 4-1, each Al 2 O 3 The thickness of the film layer 4-2 was 200 nm, the total thickness of the barrier layer 4 was 2.4 microns, and the Al film layer 4-1 was in contact with the substrate layer.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene, nano titanium oxide powder and nylon, wherein the polytetrafluoroethylene content in the coating is 10wt%, the nano titanium oxide powder content is 10wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 12 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
Example 2
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of a low-density polyethylene resin material and has a thickness of 40 micrometers.
The aluminum foil layer 2 contained 2.0wt% of Fe, 1.0wt% of Si, 0.5wt% of Cu, and had a thickness of 20. Mu.m.
The substrate layer 3 is a PET film layer with a thickness of 50 microns.
The barrier layer 4 comprises ten sub-film layer pairs with a cyclic structure, the thickness of the Al film layer 4-1 in each sub-film layer pair is 100 nanometers, and each Al 2 O 3 The thickness of the film layer 4-2 was 200 nm, the total thickness of the barrier layer 4 was 3.0 microns, and the Al film layer 4-1 was in contact with the substrate layer.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene, nano zinc oxide powder and nylon, wherein the polytetrafluoroethylene content in the coating is 20wt%, the nano zinc oxide powder content is 5wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 8 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
Example 3
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of a low-density polyethylene resin material and has a thickness of 40 micrometers.
The aluminum foil layer 2 contained 2.0wt% of Fe, 1.0wt% of Si, 0.5wt% of Cu, and had a thickness of 20. Mu.m.
The substrate layer 3 is a PE film layer with a thickness of 30 μm.
The barrier layer 4 comprises four sub-film layer pairs with a circulating structure, the thickness of the Al film layer 4-1 in each sub-film layer pair is 100 nanometers, and each Al 2 O 3 The thickness of the film layer 4-2 was 200 nm, the total thickness of the barrier layer 4 was 1.2 microns, and the Al film layer 4-1 was in contact with the substrate layer.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene, nano titanium oxide powder and nylon, wherein the content of the polytrifluoroethylene in the coating is 10wt%, the content of the nano titanium oxide powder is 10wt%, the content of the nylon is 4wt%, and the thickness of the protective layer 5 is 20 microns.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
Comparative example 1
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of low-density polypropylene resin material and has a thickness of 60 micrometers.
The aluminum foil layer 2 contained 1.5wt% of Fe, 0.6wt% of Si, 1.0wt% of Ag, and had a thickness of 12. Mu.m.
The substrate layer 3 is a PP film layer with a thickness of 80 microns.
The barrier layer 4 is continuously deposited Al 2 O 3 Film layer 4-2, thickness 2.4 microns.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene, nano titanium oxide powder and nylon, wherein the polytetrafluoroethylene content in the coating is 10wt%, the nano titanium oxide powder content is 10wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 12 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
Comparative example 2
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of low-density polypropylene resin material and has a thickness of 60 micrometers.
The aluminum foil layer 2 contained 1.5wt% of Fe, 0.6wt% of Si, 1.0wt% of Ag, and had a thickness of 12. Mu.m.
The substrate layer 3 is a PP film layer with a thickness of 80 microns.
The barrier layer 4 comprises eight pairs of sub-layers of cyclic structure, each of which has a thickness of 100 nm for the Al film layer 4-1, each Al 2 O 3 The thickness of the film layer 4-2 was 200 nm, the total thickness of the barrier layer 4 was 2.4 microns, and the Al film layer 4-1 was in contact with the substrate layer.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene, nano titanium oxide powder and nylon, wherein the polytetrafluoroethylene content in the coating is 10wt%, the nano titanium oxide powder content is 10wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 12 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer is prepared by uniformly mixing polyurethane modified by isocyanate and an organic solvent, wherein the polyurethane adhesive material is commonly used in the prior art.
Comparative example 3
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of low-density polypropylene resin material and has a thickness of 60 micrometers.
The aluminum foil layer 2 contained 1.5wt% of Fe, 0.6wt% of Si, 1.0wt% of Ag, and had a thickness of 12. Mu.m.
The substrate layer 3 is a PP film layer with a thickness of 80 microns.
The barrier layer 4 comprises eight pairs of sub-layers of cyclic structure, each of which has a thickness of 100 nm for the Al film layer 4-1, each Al 2 O 3 The thickness of the film layer 4-2 was 200 nm, the total thickness of the barrier layer 4 was 2.4 microns, and the Al film layer 4-1 was in contact with the substrate layer.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene and nylon, wherein the polytetrafluoroethylene content in the coating is 10wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 12 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
Comparative example 4
A packaging film material with high antibacterial and high barrier properties comprises a heat sealing layer 1, an aluminum foil layer 2, a base material layer 3, a barrier layer 4 and a protective layer 5 which are sequentially laminated from inside to outside;
the heat sealing layer 1 is made of low-density polypropylene resin material and has a thickness of 60 micrometers.
The aluminum foil layer 2 contained 1.5wt% of Fe, 0.6wt% of Si, 1.0wt% of Ag, and had a thickness of 12. Mu.m.
The substrate layer 3 is a PP film layer with a thickness of 80 microns.
The barrier layer 4 is continuously deposited Al 2 O 3 Film layer 4-2, thickness 2.4 microns.
The protective layer 5 is a water-based polyurethane coating containing polytetrafluoroethylene and nylon, wherein the polytetrafluoroethylene content in the coating is 10wt%, the nylon content is 8wt%, and the thickness of the protective layer 5 is 12 micrometers.
And an adhesive layer is arranged between the heat sealing layer 1 and the aluminum foil layer 2, between the aluminum foil layer 2 and the base material layer 3, and between the barrier layer 4 and the protective layer 5.
The adhesive material for preparing the adhesive layer comprises 80wt% of a polyester polyol solution with a number average molecular weight of 5000, 15wt% of triisocyanate and 5wt% of KH550, wherein the polyester polyol solution adopts N, N-dimethylformamide as a solvent, and the content of the polyester polyol is 65wt%.
The polyester polyol adopts maleic anhydride, triethylene glycol and butanol as raw materials, the maleic anhydride, the triethylene glycol and the butanol are added into a reaction container, the reaction is carried out under the constant temperature condition to form an esterification product, the negative pressure distillation is carried out under the same temperature condition to remove water and alcohol substances after the reaction is completed, and finally the reaction product is diluted into a solution with the polyester polyol content of 65wt% by adopting N, N-dimethylformamide for preparing the adhesive.
The packaging film materials with high antibacterial and high barrier properties obtained in example 1 and comparative examples 1 to 4 were cut to obtain a plurality of 50mm×50mm packaging film material samples, and each sample was subjected to the same test method and test conditions, respectively, to perform the moisture vapor transmission test, the oxygen transmission test, the peel strength test, and the antibacterial property test.
The water vapor transmission rate test was performed using an AQUATRA Model 1 moisture permeation meter from MOCON. The test result is excellent (the water vapor transmittance is less than or equal to 5 mg/m) 2 ˑ d), good（5mg/m 2 ˑd<The water vapor transmittance is less than or equal to 20mg/m 2 ˑ d), middle (20 mg/m) 2 ˑd<The water vapor transmittance is less than or equal to 100mg/m 2 ˑ d), difference (water vapor transmission rate)>100mg/m 2 ˑ d) was evaluated.
Oxygen permeability test was performed using an Ox-Tran 2/21 type oxygen permeation instrument from MOCON corporation. The test result is excellent (oxygen transmittance is less than or equal to 2 multiplied by 10) -3 cc/m 2 ˑ d), good (2×10 -3 cc/m 2 ˑd<The oxygen transmittance is less than or equal to 5 multiplied by 10 -3 cc/m 2 ˑ d), middle (5×10) - 3 cc/m 2 ˑd<The oxygen transmittance is less than or equal to 10 multiplied by 10 -3 cc/m 2 ˑ d), difference (oxygen transmittance)>10×10 -3 cc/m 2 ˑ d) was evaluated.
The peel strength was tested using a cross-hatch test. The test results were evaluated as excellent (no peeling phenomenon of the grid), good (5% < 15% of the area peeled off at the intersection of the scribe edge and the grid), medium (15% < 35% of the area peeled off at the intersection of the scribe edge and the grid), and poor (35% of the area peeled off at the intersection of the scribe edge and the grid).
The bacteria for testing the antibacterial performance are staphylococcus aureus, and the test results are excellent (the antibacterial rate is more than or equal to 95%), good (the antibacterial rate is more than or equal to 90% and less than or equal to 95%), medium (the antibacterial rate is more than or equal to 80% and less than 90%), and poor (the antibacterial rate is more than or equal to 80%).
The different test results of the above samples are summarized as follows:
comparing the test results of different performance indexes of the embodiment 1 and the comparative examples 1-4, it can be seen that the packaging film material with high antibacterial and high barrier properties provided by the invention has a multi-layer barrier protection structure of an aluminum foil layer, a barrier layer and a protective layer, so that the packaging film material reaches an excellent level in various performance tests. Due to a plurality of Al film layers and Al 2 O 3 The arrangement of the membrane layer structure may be disadvantageous for the continuous penetration of the pores in the different kinds of membrane layers, such thatThe water vapor passing rate and the oxygen passing rate are extremely low, so that bacteria in food are difficult to propagate rapidly, the aluminum foil layer and the Al film layer also have the effect of reflecting sunlight, and the aluminum foil layer and the Al film layer cooperate with nano antibacterial materials arranged in the protective layer to jointly inhibit bacteria and resist bacteria, thereby being beneficial to long-term high-quality preservation of the food. Meanwhile, due to the common use of the high-quality polyester polyol adhesive material and the impact-resistant nylon material arranged in the protective layer, the film stability of the packaging film material is greatly improved. The arrangement of the Al film layer is also beneficial to eliminating Al 2 O 3 The stress generated during the continuous deposition of the film layer improves the peeling strength of the packaging film material.
Comparative example 1 compared with example 1, since the barrier layer in comparative example 1 did not employ a plurality of Al film layers and Al of the present invention 2 O 3 A film layer structure, which adopts Al deposited completely continuously 2 O 3 The membrane layer structure is beneficial to the passing of water vapor and oxygen due to the possible existence of through micro holes and gaps in the membrane layer, so that the water vapor passing rate and the oxygen passing rate are reduced. Meanwhile, the passage of water vapor and oxygen is also beneficial to the propagation of aerobic bacteria, and the antibacterial effect is reduced to a certain extent compared with the invention as can be seen from the antibacterial rate result. In addition, since the Al film layer was not provided, the peel strength of the packaging film material obtained in comparative example 1 was reduced as compared with example 1.
Comparative example 2 in comparison with example 1, the packaging film material of comparative example 2 did not use the three-layer adhesive layer made of the adhesive provided by the present invention, resulting in some decrease in the barrier properties against moisture and oxygen and decrease in the antibacterial rate. More disadvantageously, the traditional polyurethane adhesive layer is adopted, so that the packaging film material has poor performance in a scribing test, and a large-area stripping phenomenon occurs at scribing positions and in grids, so that the stability of the packaging film material is not facilitated.
Comparative example 3 compared with example 1, the protective layer of comparative example 3 was not added with nano-antibacterial powder, and the result shows that the addition or non-addition of nano-antibacterial powder has little influence on the water vapor passing rate, oxygen passing rate and peeling resistance of the packaging film material, but has a certain adverse effect on the antibacterial performance of the packaging film material.
Comparative example 4 in comparison with example 1, neither a plurality of Al film layers nor Al were provided in comparative example 4 2 O 3 The film layer structure is also free from arranging nano antibacterial powder in the protective layer, and the water vapor passing rate, the oxygen passing rate and the peeling strength of the packaging film material are directly affected in the same way as the analysis. The packaging film material in comparative example 4 was the least effective in inhibiting bacteria in terms of the bacteriostatic properties of the packaging film material.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (2)

1. The packaging film material with high antibacterial and high barrier properties is characterized by comprising a heat sealing layer (1), an aluminum foil layer (2), a base material layer (3), a barrier layer (4) and a protective layer (5) which are sequentially laminated from inside to outside;
the barrier layer (4) is formed by laminating at least two sub-film layer pairs circularly, and each sub-film layer pair consists of an Al film layer (4-1) and Al 2 O 3 The film layer (4-2) is formed, the Al film layer (4-1) is contacted with the substrate layer (3), the thickness of the single Al film layer is 50-100 nanometers, and the single Al film layer is formed 2 O 3 The thickness of the film layer is 100-200 nanometers, and the thickness of the barrier layer is 300 nanometers to 3 micrometers;
the heat sealing layer (1) is a polyethylene resin layer or a polypropylene resin layer, and the thickness of the heat sealing layer (1) is 40-100 micrometers;
the aluminum foil layer (2) is doped with 0.5-2.0wt% of Fe, 0.2-1.0wt% of Si and 0.5-4.0wt% of Cu and/or Ag, and the thickness of the aluminum foil layer (2) is 8-20 micrometers;
the substrate layer (3) is PP, PE or PET, and the thickness of the substrate layer (3) is 20-80 microns;
the protective layer (5) is a water-based polyurethane coating, the thickness of the protective layer (5) is 8-20 microns, and a fluorine-containing resin hydrophobic material, nano antibacterial powder and nylon are added into the water-based polyurethane coating; the content of the fluorine-containing resin hydrophobic material in the protective layer (5) is 10-20wt%, the content of the nano antibacterial powder in the protective layer (5) is 5-10wt%, and the content of the nylon in the protective layer (5) is 4-8wt%;
the fluorine-containing resin hydrophobic material is selected from polytetrafluoroethylene or polytrifluoroethylene;
the nano antibacterial powder is anatase nano titanium oxide powder or nano zinc oxide powder;
the adhesive material for preparing the adhesive layer comprises polyester polyol with the number average molecular weight of 3000-6000 and triisocyanate, wherein the polyester polyol is prepared by adopting maleic anhydride, triethylene glycol and butanol as raw materials;
the preparation of the packaging film material comprises the following steps:
s1: sequentially bonding and manufacturing an aluminum foil layer (2) and a heat sealing layer (1) on one side of a base material layer (3);
s2: preparing a barrier layer (4) and a protective layer (5) on the other side of the substrate layer (3) in sequence, wherein the barrier layer (4) comprises an Al film layer (4-1) and Al 2 O 3 The film layer (4-2) is prepared by a magnetron sputtering method;
respectively carrying out ion etching on the substrate layer and each sub-film layer before preparing the barrier layer (4) and after preparing each sub-film layer, wherein the gas adopted by the ion etching is helium or argon;
the base material layer (3) is corona-treated in advance before the aluminum foil layer (2) is produced.
2. Use of the packaging film material with high antibacterial and high barrier properties according to claim 1 in food packaging and pharmaceutical packaging.
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