CN114516214A - Packaging composite film and preparation method and application thereof - Google Patents
Packaging composite film and preparation method and application thereof Download PDFInfo
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- CN114516214A CN114516214A CN202210236041.5A CN202210236041A CN114516214A CN 114516214 A CN114516214 A CN 114516214A CN 202210236041 A CN202210236041 A CN 202210236041A CN 114516214 A CN114516214 A CN 114516214A
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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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- 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
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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
- 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
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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
- 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
- B32B27/06—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
- B32B27/32—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
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
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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
- 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
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- 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
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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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4023—Coloured on the layer surface, e.g. ink
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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
- B32B2439/00—Containers; Receptacles
- B32B2439/02—Open containers
- B32B2439/06—Bags, sacks, sachets
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
Abstract
The invention provides a packaging composite film and a preparation method and application thereof. The packaging composite film comprises a first polymer layer, an ink layer, a first glue layer and a two-dimensional code layer which are sequentially overlapped from outside to inside; the two-dimensional code layer is a milky white polymer layer; or the two-dimensional code layer comprises a metal layer, a second glue layer and a milky white polymer layer which are sequentially overlapped, wherein one surface of the metal layer, which is far away from the second glue layer, is attached to one surface of the first glue layer, which is far away from the ink layer; or the two-dimensional code layer is including metal level, second glue layer, white ink layer and the transparent polymer layer that superposes in proper order and set up, the one side that the second glue layer was kept away from to the metal level is laminated mutually with the one side that the printing ink layer was kept away from to first glue layer. According to the invention, the two-dimensional code layer is arranged on the inner layer of the packaging composite film, so that prize winning information can be directly acted in the packaging bag, and the requirements of bag opening and lottery drawing can be met without adding excessive raw materials.
Description
Technical Field
The invention belongs to the technical field of composite films, and particularly relates to a packaging composite film and a preparation method and application thereof.
Background
The lottery ticket, also called scratch lottery, is a sales promotion form used by merchants for selling goods, and is generally made of paper or card and has variable numbers or characters and figures marked with lottery items. The variable digital code or the character and figure are covered by a silver layer, which is called as silver scraping layer or label, and the prize winning information is known by scraping and uncovering. The variable digital code or the character pattern and the silver layer have the anti-counterfeiting function, thereby not only meeting the requirements of consumers on lottery and game psychology, but also achieving the purposes of sales promotion of commodities by merchants and preventing losses caused by counterfeiting lottery tickets by other people.
At present, prize-scraping promotion activities are very popular, especially various food and beverage manufacturers attract consumers by means of scratch activities, under general conditions, the scratch printing mode is to cut an opaque paper, print various gifts such as prize names or prize money numbers on the paper, then print a layer of opaque scratch ink after covering a layer of transparent film, when the consumer scratches the scratch ink, the prize names or prize money numbers can be displayed, and prize activities can be performed, but because the prize-scraping structures are quite complicated in printing, the manufacturing processes such as cutting the paper, covering the film and printing the scratch ink must be firstly carried out, the manufacturing time and the cost are quite high, and the structures cannot be used on a heat-shrinkable film label sleeve, the same prize-scraping activities are hardly found on beverage packages, and the sale quantity of beverages is indirectly influenced, even though some players adopt prize-giving methods such as tearing off a label for communication and checking prizes or pulling off a bottle cap, the effect is not as effective as that of scratch prize-giving methods.
The outermost film layer of scratch cards is typically formed by screen printing silver ink over the security information. In the printing process, silver ink needs to be diluted by chemical solvents such as isophorone, and the chemical solvents such as isophorone have large smell, so that the pollution to the working environment is caused, and the health of printing workers is not facilitated. The scratch-off film layer is formed by printing the security information with silver ink, and the security information is printed with ink, so that the security information and the scratch-off film layer are both ink and are easy to mutually permeate when combined together, and once mutually permeate, the scratch-off film layer is difficult to scrape off. Therefore, the security information must be cured with uv light before a scratch-off film layer can be printed. Even in this way, the shelf life is only about half a year, and the scraped film layer cannot be scraped after the shelf life exceeds half a year, so that the shelf life is not long.
CN102616034A discloses a scratch card production process. The production process of the scratch card adopts a UV printer, combines a printing process with a subsequent process of applying insulating oil, and utilizes the performance of the machine in one step; spraying codes before printing, printing colors in the front groups and the back group or the two groups of the UV printer, performing isolated oil printing, and then printing, silk-screen printing and scraping ink. By adopting the UV printing machine in the technical scheme, the UV oil for efficiently printing the lottery cards and the upper ink is separated, and the traditional silk-screen printing UV separation oil which is once put in place is improved by 10 times, so that the production cost is greatly reduced, the production period is shortened, and the resource waste is reduced.
At present, in order to improve sales volume and market share, a bag opening lottery mode is usually arranged to attract consumers so as to improve the sales volume. The lottery drawing method is not a good method in view of the required material type, the process complexity, the environmental protection and the like. Therefore, how to develop a lottery drawing method which can directly act on the interior of the packaging bag and does not need to add excessive raw materials and processes is simple, convenient and environment-friendly, and becomes a technical problem to be solved urgently at present.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a packaging composite film, a method of making the same and uses thereof. According to the invention, through the design of the structure of the packaging composite film and the arrangement of the two-dimensional code layer on the inner layer of the packaging composite film, the prize winning information can be directly acted inside the packaging bag, and the packaging composite film meeting the bag opening lottery drawing requirements can be prepared without adding excessive raw materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
In a first aspect, the invention provides a packaging composite film, which is characterized by comprising a first polymer layer, an ink layer, a first glue layer and a two-dimensional code layer which are sequentially overlapped from outside to inside;
the two-dimensional code layer is a milky white polymer layer;
or the two-dimensional code layer comprises a metal layer, a second glue layer and a milky white polymer layer which are sequentially overlapped, wherein one surface of the metal layer, which is far away from the second glue layer, is attached to one surface of the first glue layer, which is far away from the ink layer;
or the two-dimensional code layer is including metal level, second glue layer, white ink layer and the transparent polymer layer that superposes in proper order and set up, the one side that the second glue layer was kept away from to the metal level is laminated mutually with the one side that the printing ink layer was kept away from to first glue layer.
According to the invention, through the design of the packaging composite film structure and the arrangement of the two-dimensional code layer on the inner layer of the packaging composite film, prize winning information can be directly acted in the packaging bag, excessive raw materials and processes are not required to be added, and the requirement of bag opening and lottery drawing can be met.
In the prior art, a lottery drawing card is usually placed in a bag when the bag is opened, a lottery drawing code is covered with a layer of printing ink, and the card needs to be sealed by a plastic bag. When drawing a lottery, firstly, the packaging bag needs to be opened to take out the card, then the sealed plastic bag on the card is removed, the ink on the upper layer of the prize drawing code is scraped, prize information is obtained, and the prize drawing is carried out. The lottery drawing method has the advantages of various required materials, complex preparation process and no environmental protection.
Therefore, the invention provides a packaging composite film with a two-dimensional code on the inner layer, and the two-dimensional code layer is arranged on the inner layer of the packaging composite film, so that prize winning information can be directly applied to the inside of a packaging bag, excessive raw materials and processes are not required to be added, and the requirements of bag opening and lottery drawing can be met. When drawing a lottery, open the wrapping bag after, can see the two-dimensional code that is located the packing inlayer, then sweep the sign indicating number, can obtain prize information, exchange the prize. The packaging composite film provided by the invention simplifies the production process of bag opening and lottery drawing, reduces the waste of raw materials, and avoids the problem of environmental pollution caused by the design of an ink layer; meanwhile, the two-dimensional code of the inner layer of the packaging composite film can be connected with a company website, the propaganda strength of the company is enhanced, and the prize exchange method is simpler and more direct.
According to the invention, the two-dimensional code layer is the milky white polymer layer or the two-dimensional code layer is arranged to comprise the metal layer, the second glue layer and the milky white polymer layer which are sequentially overlapped, or the two-dimensional code layer is arranged to be the metal layer, the second glue layer, the white ink layer and the transparent polymer layer, so that a clear two-dimensional code shape can be obtained, and the winning information can be favorably obtained.
The following are preferred embodiments of the present invention, but not limiting the technical solutions provided by the present invention, and the objects and advantages of the present invention can be better achieved and achieved by the following preferred embodiments.
In a preferred embodiment of the present invention, the first polymer layer is selected from any one of a PET layer, a BOPP layer, and a PA layer.
The PET layer is a polyethylene terephthalate layer, the BOPP layer is a biaxially oriented polypropylene film layer, and the PA layer is a polyacrylate layer.
Preferably, the thickness of the first polymer layer is 10 to 15 μm, for example, 10 μm, 10.5 μm, 11 μm, 11.5 μm, 12 μm, 12.5 μm, 13 μm, 13.5 μm, or 15 μm.
In a preferred embodiment of the present invention, the ink layer has a thickness of 1 μm or less, and may be, for example, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.
In a preferred embodiment of the present invention, the thickness of the first glue layer is 1 to 2 μm, and may be, for example, 1 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm, or 2 μm.
As a preferred embodiment of the present invention, the opal polymer layer is selected from an opal PE layer or an opal CPP layer.
Illustratively, PE is polyethylene and CPP is polypropylene produced by cast extrusion.
Preferably, the thickness of the milky white polymer layer is 30 μm or more, and may be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm or the like, for example.
In a preferred embodiment of the present invention, the metal layer is selected from any one of an aluminum layer, a VMPET layer, and a VMOPP layer.
The VMPET layer is a polyester aluminizer, and the VMOPP layer is a polypropylene aluminizer; meanwhile, it should be noted that if the VMPET layer or the VMOPP layer is selected as the metal layer, the aluminized surface is attached to the surface of the first glue layer away from the ink layer.
Preferably, the thickness of the metal layer is 7 to 10 μm, and may be 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, or 10 μm, for example.
In a preferred embodiment of the present invention, the thickness of the second glue layer is 1 to 2 μm, and may be, for example, 1 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm, or 2 μm.
As a preferable embodiment of the present invention, the thickness of the white ink layer is 1 μm or less, and may be, for example, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.
Preferably, the thickness of the transparent polymer layer ≧ 30 μm may be, for example, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, or the like.
It should be noted that, in the present invention, the material of the transparent polymer layer is not limited in any way, and the transparent polymer layer commonly used in the art is applicable, and examples include but are not limited to: transparent PE, transparent CPP.
In a second aspect, the present invention provides a method of making a packaging composite film according to the first aspect, the method comprising the steps of:
and after the first polymer layer, the ink layer, the first glue layer and the two-dimensional code layer are compounded, laser coding is carried out on one side, away from the first glue layer, of the two-dimensional code layer, and the packaging composite film is obtained.
It should be noted that, in the present invention, there is no particular limitation on the power and time of laser coding, and the power and time of laser coding commonly used in the art are applicable, and exemplary ones include but are not limited to: the laser coding power is 70%, the time is 10-20 mu s, wherein the laser coding power of 70% refers to the setting of the laser coding power on the basis of 15W of the total power, and the 15W is 100%.
In a third aspect, the present invention provides the use of a packaging laminate according to the first aspect in a coded lottery package.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the design of the structure of the packaging composite film, the material and the structure of the two-dimensional code are further designed, and the two-dimensional code layer is arranged on the inner layer of the packaging composite film, the two-dimensional code with clear shape can be obtained, the prize winning information can be directly acted in the packaging bag, and the packaging composite film meeting the lottery drawing requirement of the inner code can be obtained without adding excessive raw materials.
Drawings
FIG. 1 is a schematic structural view of a packaging composite film provided in examples 1-2 of the present invention;
FIG. 2 is a schematic structural view of a packaging composite film provided in examples 3-5 of the present invention;
FIG. 3 is a schematic structural view of a packaging composite film provided in examples 6-8 of the present invention;
the ink comprises, by weight, 1-a first polymer layer, 2-an ink layer, 3-a first glue layer, 4-a two-dimensional code layer, 41-a metal layer, 42-a second glue layer, 43-a milky polymer layer, 44-a white ink layer and 45-a transparent polymer layer.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Some of the component sources in the following examples and comparative examples are as follows:
PET: national style PET, common type;
milky white PE: shanghai Zijiang color printing;
transparent PE: shanghai Zijiang color printing.
Example 1
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 1, wherein the packaging composite film comprises a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked from outside to inside;
the first polymer layer 1 is a PET layer with a thickness of 12 μm;
the thickness of the ink layer 2 is 0.8 μm;
the thickness of the first glue layer 3 is 1.5 mu m;
the two-dimensional code layer 4 is a milky PE layer and has a thickness of 70 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 2
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 1, wherein the packaging composite film comprises a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked from outside to inside;
The first polymer layer 1 is a PET layer with the thickness of 10 μm;
the thickness of the ink layer 2 is 0.5 μm;
the thickness of the first glue layer 3 is 1 μm;
the two-dimensional code layer 4 is a milky PE layer with the thickness of 50 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 3
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 2, wherein the packaging composite film comprises a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked from outside to inside;
the first polymer layer 1 is a PET layer with a thickness of 14 μm;
the thickness of the ink layer 2 is 0.7 μm;
the thickness of the first glue layer 3 is 1.6 mu m;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42 and a milky white polymer layer 43 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
The metal layer 41 is an aluminum layer and has a thickness of 8 μm;
the thickness of the second glue layer 42 is 1.5 μm;
the opal polymer layer 43 is an opal PE layer having a thickness of 30 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 4
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 2, wherein the packaging composite film comprises a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked from outside to inside;
the first polymer layer 1 is a PET layer with a thickness of 15 μm;
the thickness of the ink layer 2 is 1 μm;
the thickness of the first glue layer 3 is 2 μm;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42 and a milky white polymer layer 43 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
the metal layer 41 is an aluminum layer and has a thickness of 7 μm;
The thickness of the second glue layer 42 is 1 μm;
the opal polymer layer 43 is an opal PE layer with a thickness of 50 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 5
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 2, wherein the packaging composite film comprises a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked from outside to inside;
the first polymer layer 1 is a PET layer with a thickness of 12 μm;
the thickness of the ink layer 2 is 0.8 μm;
the thickness of the first glue layer 3 is 1.2 mu m;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42 and a milky white polymer layer 43 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
the metal layer 41 is an aluminum layer and has a thickness of 10 μm;
the thickness of the second glue layer 42 is 2 μm;
The opal polymer layer 43 is an opal PE layer having a thickness of 30 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 6
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 3, the packaging composite film comprises, from outside to inside, a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked;
the first polymer layer 1 is a PET layer with a thickness of 14 μm;
the thickness of the ink layer 2 is 0.7 μm;
the thickness of the first glue layer 3 is 1.6 mu m;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42, a white ink layer 44 and a transparent polymer layer 45 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
the metal layer 41 is an aluminum layer and has a thickness of 8 μm;
the thickness of the second glue layer 42 is 1.5 μm;
The thickness of the white ink layer 44 is 0.7 μm
The transparent polymer layer 45 is a transparent PE layer with a thickness of 50 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 7
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 3, the packaging composite film comprises, from outside to inside, a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked;
the first polymer layer 1 is a PET layer with a thickness of 15 μm;
the thickness of the ink layer 2 is 1 μm;
the thickness of the first glue layer 3 is 2 μm;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42, a white ink layer 44 and a transparent polymer layer 45 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
the metal layer 41 is an aluminum layer and has a thickness of 7 μm;
the thickness of the second glue layer 42 is 1 μm;
The thickness of the white ink layer 44 is 0.8 μm;
the transparent polymer layer 45 is a transparent PE layer having a thickness of 30 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Example 8
The embodiment provides a packaging composite film, a schematic structural diagram of which is shown in fig. 3, the packaging composite film comprises, from outside to inside, a first polymer layer 1, an ink layer 2, a first glue layer 3 and a two-dimensional code layer 4 which are sequentially stacked;
the first polymer layer 1 is a PET layer with a thickness of 12 μm;
the thickness of the ink layer 2 is 0.8 μm;
the thickness of the first glue layer 3 is 1.2 mu m;
the two-dimensional code layer 4 comprises a metal layer 41, a second glue layer 42, a white ink layer 44 and a transparent polymer layer 45 which are sequentially stacked, wherein one surface of the metal layer 41, which is far away from the second glue layer 42, is attached to one surface of the first glue layer 3, which is far away from the ink layer 2;
the metal layer 41 is an aluminum layer and has a thickness of 10 μm;
the thickness of the second glue layer 42 is 2 μm;
The thickness of the white ink layer 44 is 1 μm;
the transparent polymer layer 45 is a transparent PE layer with a thickness of 60 μm.
The preparation method of the packaging composite film comprises the following steps:
and compounding the first polymer layer 1, the ink layer 2, the first glue layer 3 and the two-dimensional code layer 4, and then performing laser coding on one side, away from the first glue layer 3, of the two-dimensional code layer 4 to obtain the packaging composite film, wherein the laser coding power is 70%, and the laser coding time is 18 mu s.
Comparative example 1
This comparative example provides a packaging composite film differing from example 1 only in that the milky-white PE layer was replaced with a transparent PE layer, and the other conditions were the same as in example 1.
The performance of the packaging composite films provided in the above examples and comparative examples was tested as follows:
the two-dimensional code shape: observing whether the shapes of the two-dimensional codes formed on the two-dimensional code layers of the inner layers of the packaging composite films provided by the embodiment and the comparative example are complete and clear;
code scanning state: and scanning the two-dimensional code layer on the inner layer of the packaging composite film provided by the embodiment and the comparative example, and checking whether related information is obtained.
The above examples and comparative examples provide performance test results for the packaging composite films as shown in table 1 below:
TABLE 1
As can be seen from the content in table 1, the two-dimensional code with clear shape can be obtained by designing the structure of the packaging composite film, further designing the material and the structure of the two-dimensional code, and arranging the two-dimensional code layer on the inner layer of the packaging composite film, and the prize winning information can be directly applied to the interior of the packaging bag without adding excessive raw materials and processes. When drawing a lottery, the packaging composite film meeting the requirement of the inner code drawing of lottery can be obtained without adding excessive raw materials after the packaging bag is opened.
Compared with example 1, if the two-dimensional code layer is a transparent polymer layer (comparative example 1), the two-dimensional code shape of the inner layer of the prepared packaging composite film is unclear, and the scanning cannot be completed to obtain the prize winning information.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The packaging composite film is characterized by comprising a first polymer layer, an ink layer, a first glue layer and a two-dimensional code layer which are sequentially overlapped from outside to inside;
the two-dimensional code layer is a milky white polymer layer;
or the two-dimensional code layer comprises a metal layer, a second glue layer and a milky white polymer layer which are sequentially overlapped, wherein one surface of the metal layer, which is far away from the second glue layer, is attached to one surface of the first glue layer, which is far away from the ink layer;
or the two-dimensional code layer is including metal level, second glue layer, white ink layer and the transparent polymer layer that superposes in proper order and set up, the one side that the second glue layer was kept away from to the metal level is laminated mutually with the one side that the printing ink layer was kept away from to first glue layer.
2. The packaging composite film according to claim 1, wherein the first polymer layer is selected from any one of a PET layer, a BOPP layer or a PA layer;
preferably, the thickness of the first polymer layer is 10 to 15 μm.
3. The packaging composite film according to claim 1 or 2, wherein the ink layer has a thickness of 1 μm or less.
4. A packaging composite film according to any of claims 1-3 wherein the first glue layer has a thickness of 1-2 μm.
5. A packaging composite film according to any of claims 1-4 wherein said opal polymer layer is selected from an opal PE layer or an opal CPP layer;
preferably, the thickness of the milky white polymer layer is more than or equal to 30 μm.
6. Packaging composite film according to any of claims 1-5, wherein the metal layer is selected from any of an aluminium layer, a VMPET layer or a VMOPP layer;
preferably, the thickness of the metal layer is 7-10 μm.
7. A packaging composite film according to any of claims 1-6 wherein the second glue layer has a thickness of 1-2 μm.
8. A packaging composite film according to any of claims 1-7, characterised in that the thickness of the white ink layer is less than or equal to 1 μm;
preferably, the thickness of the transparent polymer layer is ≧ 30 μm.
9. A method of manufacturing a packaging composite film according to any of claims 1-8, characterised in that the method comprises the steps of:
and after the first polymer layer, the ink layer, the first glue layer and the two-dimensional code layer are compounded, laser coding is carried out on one side, away from the first glue layer, of the two-dimensional code layer, and the packaging composite film is obtained.
10. Use of a packaging laminate according to any one of claims 1 to 8 in a coded lottery package.
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