CN114536920A - Composite membrane and preparation method and application thereof - Google Patents
Composite membrane and preparation method and application thereof Download PDFInfo
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- CN114536920A CN114536920A CN202210178210.4A CN202210178210A CN114536920A CN 114536920 A CN114536920 A CN 114536920A CN 202210178210 A CN202210178210 A CN 202210178210A CN 114536920 A CN114536920 A CN 114536920A
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- 239000002131 composite material Substances 0.000 title claims abstract description 91
- 239000012528 membrane Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 109
- 239000010408 film Substances 0.000 claims abstract description 105
- 239000003292 glue Substances 0.000 claims abstract description 43
- 239000010409 thin film Substances 0.000 claims abstract description 20
- 229920001684 low density polyethylene Polymers 0.000 claims description 12
- 239000004702 low-density polyethylene Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000004806 packaging method and process Methods 0.000 claims description 10
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 9
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 230000006378 damage Effects 0.000 abstract description 5
- 239000012785 packaging film Substances 0.000 abstract description 2
- 229920006280 packaging film Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 198
- 238000000034 method Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000005025 cast polypropylene Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000005022 packaging material Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010330 laser marking Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
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- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- 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
-
- 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
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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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- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a composite membrane and a preparation method and application thereof. The composite film comprises a first polymer layer, a first ink layer, a first glue layer, a second polymer layer, an aluminum-plated thin film layer, a second glue layer, a third polymer layer and a two-dimensional code layer which are sequentially stacked; the aluminized surface of the aluminized film layer is attached to the surface, away from the first glue layer, of the second polymer layer; the two-dimensional code layer comprises a white ink layer and a transparent polymer layer which are attached to each other, and one surface of the white ink layer, which is far away from the transparent polymer layer, is attached to one surface of the third polymer layer, which is far away from the second glue layer; or the two-dimensional code layer is a white polymer layer. The surface of the composite film provided by the invention has a clear two-dimensional code pattern, and the aluminum film in the aluminum-plated film layer is complete and free of damage, so that the composite film is suitable for being used as a product packaging film.
Description
Technical Field
The invention belongs to the technical field of composite membranes, and particularly relates to a composite membrane and a preparation method and application thereof.
Background
The two-dimensional code (also called as two-dimensional bar code) is a bar code which is expanded from one dimension to another dimension and has readability, binary data is represented by black and white rectangular patterns, and information contained in the binary data can be acquired after the binary data is scanned by equipment. It can store more information than the traditional Bar Code Bar Code and can also represent more data types. The two-dimensional code usually has specific positioning marks (for example, the QR code is three large positioning points), and the positioning marks enable a code reader to correctly identify and read the two-dimensional code, so that the two-dimensional code can be identified from any direction.
The two-dimensional code can store various information, mainly including: web address, name card, text information, specific code. According to the application mode of the information, the method can be divided into the following steps: 1. online applications, such as web sites and specific codes, and more online applications; 2. offline applications, such as text messages and business cards, are more offline applications. The two-dimensional bar code has the characteristics of large storage capacity, high confidentiality, high traceability, strong damage resistance, high redundancy, low cost and the like, and the characteristics are particularly suitable for the aspects of forms, security, confidentiality, tracking, license, stock counting, data redundancy and the like.
The laser coding can be used for coding various characters, symbols, patterns and the like, and the size of the characters can be from millimeter to micron, which has special significance for the anti-counterfeiting of products. Therefore, laser coding is also being studied more and more intensively. In the prior art, two-dimensional codes can be prepared on corresponding materials by a laser coding method, and two main forming modes of laser coding are as follows: one is to use infrared laser: the substance on the surface of the material is heated and vaporized (evaporated) to remove the material, which is generally called thermal processing.a YAG laser (wavelength of 1.06 μm) is mainly used; secondly, using ultraviolet laser: the ultraviolet photon with high energy directly destroys the molecular bond on the surface of many non-metal materials to make the molecule break away from the object, this way will not generate high heat, so it is called cold processing, mainly adopts ultraviolet laser (wavelength is 355nm), through comparison, it can be seen that the ultraviolet laser has small focusing spot and very little processing heat affected zone, so it can do fine marking, special material marking, it is the customer selection with high demand for marking effect.
CN210548870U discloses an automatic positioning laser coding device. The automatic positioning laser coding device comprises: the device comprises a control assembly, a laser coding assembly and a multi-axis motion assembly; the control assembly is electrically connected with the laser coding assembly and used for acquiring positioning information of the workpiece, sending the positioning information to the multi-axis motion assembly, and sending a control instruction for coding the workpiece to the laser coding assembly through an electric signal after receiving a trigger instruction; the laser coding assembly is arranged on the multi-axis movement assembly and used for receiving the control instruction and performing laser coding on the workpiece according to the control instruction; the multi-axis movement assembly is used for receiving the positioning information, and sending the trigger instruction to the control assembly according to the positioning information and the position of the workpiece where the laser coding assembly arranged on the multi-axis movement assembly moves. The automatic positioning laser coding device provided by the technical scheme can accurately realize positioning and save cost.
CN107081970A discloses a method and an apparatus for marking invisible two-dimensional codes on the surface of a metal material by using laser. The apparatus comprises: the system comprises a marking system, a laser, a control system, a beam expanding lens, a galvanometer system, an f-theta lens, an industrial camera system and a code reading system, wherein the laser pulse width of the laser is 1-100 ns; the nominal focal length of the f-theta lens is no greater than 160 mm. According to the technical scheme, the invisible two-dimensional code which cannot be seen by human eyes is marked on the metal material by controlling the pulse width of the laser, the dot diameter of the two-dimensional code dot matrix and the dot spacing, and the invisible two-dimensional code is photographed and read by the industrial camera system and the code reading system, so that the invisible anti-counterfeiting function is realized.
CN207888075U discloses a full-automatic integrated application system of PCB board two-dimensional code laser marking. The full-automatic integrated application system for laser marking of the two-dimension codes of the PCB comprises a transmission mechanism, a PCB interception mechanism, a PCB shooting mechanism, a PCB visual identification mechanism, an upper laser 3D marking mechanism, a lower laser 3D marking mechanism, a visual acquisition system mechanism and a human-computer operation platform. A man-machine operation platform is arranged on one side of the transmission mechanism, the PCB shooting plate mechanism is located on two sides of the transmission mechanism, the PCB intercepting mechanism is located in the middle of the transmission mechanism, the upper laser 3D marking mechanism and the lower laser 3D marking mechanism are located above and below the transmission mechanism respectively, the PCB visual recognition mechanism is located above the PCB intercepting mechanism, the visual collection system mechanism is located above the tail end of the transmission mechanism, a sensor is arranged on the transmission mechanism, and each mechanism is provided with an electric control device. The application system that provides among this technical scheme adopts upper and lower big breadth laser marking technique, can once only mark the monoblock PCB board two-dimensional code.
In the prior art, the method for expressing the two-dimensional code on the composite film generally uses an ink-jet coding technology, which codes on the outermost surface of a product packaging material, and the ink-jet coding technology has the defects that characters printed by ink-jet coding are easy to erase, and UV curing ink is adopted to improve the scratch resistance of the characters and the bonding fastness of the characters and a film, but the technology cannot be applied to food packaging because carcinogenic residual photoinitiator contained in the UV curing ink can migrate to pollute food. The laser coding method can avoid the harm of harmful substances to food safety, but due to the heat effect, the plastic film on the composite film packaging material is easy to carbonize to influence the coding quality, and compared with the films such as polyester, nylon and the like, the absorption rate of the traditional infrared laser energy is very low for polyolefins such as polyethylene, polypropylene and the like.
When traditional infrared laser coding carries out laser coding to the top layer for transparent polymer layer and the middle complex film that contains aluminized structure, probably because the top layer is transparent polymer's design, make it can't obtain clear two-dimensional code shape, if increase the energy of laser, probably make the complex film beat through, harm its structure, make it unable use. Therefore, how to perform laser coding on the composite film with the surface layer being the transparent polymer layer and the middle containing the aluminum plating structure to make the composite film have a clear two-dimensional code shape without damaging the composite film with the middle containing the aluminum plating structure is a technical problem to be solved urgently.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a composite membrane and a preparation method and application thereof. According to the invention, through the design of the composite film structure, the white ink layer or the white polymer layer is further arranged, and after the code is printed by ultraviolet laser or optical fiber laser, the color of the white ink layer or the white polymer layer can be reversed, so that a clear two-dimensional code pattern is formed on the surface of the composite film, and an aluminum film in the aluminum-plated thin film layer is not damaged, so that the prepared composite film is suitable for being used as a packaging film.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a composite film, which includes a first polymer layer, a first ink layer, a first glue layer, a second polymer layer, an aluminum-plated thin film layer, a second glue layer, a third polymer layer and a two-dimensional code layer, which are sequentially stacked;
the aluminized surface of the aluminized film layer is attached to the surface, away from the first glue layer, of the second polymer layer;
the two-dimensional code layer comprises a white ink layer and a transparent polymer layer which are attached to each other, wherein one surface of the white ink layer, which is far away from the transparent polymer layer, is attached to one surface of the third polymer layer, which is far away from the second glue layer;
or the two-dimensional code layer is a white polymer layer.
In the prior art, a method for printing a two-dimensional code on a composite film is generally to use an ink-jet or laser coding technology to code the outermost surface of a product packaging material. The traditional infrared laser coding burning volatilization method is easy to burn out the composite film packaging material, especially a composite film with a plastic/plastic structure, and when the composite film with a transparent polymer layer on the surface layer and an aluminum-plated thin film layer in the middle is subjected to laser coding, clear two-dimensional code patterns cannot be obtained due to the fact that the transparent polymer layer is on the surface layer; however, increasing the energy of the laser may cause the composite film to be punched through, damage the aluminum film in the aluminum-plated thin film layer, and finally cause the performance of the prepared composite film to be reduced due to barrier property loss.
Therefore, the composite film structure with the transparent polymer layer on the surface layer and the aluminum-plated thin film layer in the middle is designed, and the white ink layer or the white polymer layer is further arranged, so that when the composite film is subjected to laser coding, light beams irradiate the middle of the composite film through the transparent polymer layer, and molecular chains of the light beams are broken when the light beams pass through the white ink layer or the white polymer layer in the process of laser coding, so that photochromism is caused, and a two-dimensional code with clear patterns is further formed; in addition, the white ink layer or the white polymer layer is arranged, so that the problem that an aluminum film in the aluminum-plated film layer is damaged during laser coding is avoided, the complete and nondestructive composite film with clear two-dimensional code patterns can be prepared, and the composite film is suitable for the field of packaging.
The invention does not need to add too many raw materials, can obtain relevant information by scanning the two-dimensional code, and can achieve the aim of environmental protection. The invention provides a technical scheme for solving the problem of difficult code printing when the middle layer of the composite film is an aluminizer, and if the two-dimensional code layer is made of white polymer, the two-dimensional code with clear patterns can be obtained without arranging a white ink layer, and the scanning state is better.
The following is a preferred technical solution of the present invention, but not a limitation to the technical solution provided by the present invention, and the object and advantageous effects of the present invention can be better achieved and achieved by the following preferred technical solution.
In a preferred embodiment of the present invention, the material of the first polymer layer is selected from BOPP, PET, and PA.
It should be noted that BOPP is a biaxially oriented polypropylene film, PET is polyethylene terephthalate, and PA is nylon.
The thickness of the first polymer layer is preferably 10 to 30 μm, and may be, for example, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 23 μm, 25 μm, 27 μm, or 30 μm, and more preferably 10 to 25 μm.
In a preferred embodiment of the present invention, the thickness of the first ink layer is not more than 1 μm, 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 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, 2 μm, or the like.
As a preferred embodiment of the present invention, the second polymer layer is an LDPE layer.
The LDPE is low density polyethylene.
Preferably, the thickness of the second polymer layer is 10 to 15 μm, and may be, 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 aluminum-plated thin film layer is VMPET or VMOPP.
The VMPET is a polyester aluminum-plated film, and the VMOPP layer is a polypropylene aluminum-plated film.
The thickness of the aluminum-plated thin film layer is preferably 10 to 20 μm, and may be, for example, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, or 20 μm.
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.
Preferably, the third polymer layer is an LDPE layer.
Preferably, the thickness of the third polymer layer is 10 to 15 μm, and may be, 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 thickness of the white ink layer is not more than 1 μm, 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.
The thickness of the transparent polymer layer is preferably not less than 30 μm (for example, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, or the like is possible), and more preferably 30 to 50 μm.
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 (polyethylene), transparent CPP (cast polypropylene film).
The thickness of the white polymer layer is preferably 30 to 80 μm, and may be, for example, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, or 80 μm.
Meanwhile, in the present invention, the material of the white polymer layer is not limited in any way, and the white polymer layer commonly used in the art is applicable, and examples include but are not limited to: white PE.
In a second aspect, the present invention provides a method for preparing a composite membrane according to the first aspect, comprising the steps of:
and after the first polymer layer, the first ink layer, the first glue layer, the second polymer layer, the aluminized film layer, the second glue layer, the third polymer layer and the two-dimensional code layer which are sequentially overlapped are compounded, performing laser coding on one side of the two-dimensional code layer away from the third polymer to obtain the packaging composite film.
In a preferred embodiment of the present invention, the laser coding power is 70 to 90%, and may be, for example, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, or 90%.
In the invention, the laser coding power is 70-90%, which means that the total power 15W is 100%, and the laser coding power is 70-90% of 15W.
Preferably, the laser coding time is 15-25 μ s, for example, 15 μ s, 16 μ s, 17 μ s, 18 μ s, 19 μ s, 20 μ s, 21 μ s, 22 μ s, 23 μ s, 24 μ s, or 25 μ s.
In the invention, the composite film with a clear two-dimensional code pattern on the surface can be obtained by controlling the power and time of laser coding within a specific range. If the laser coding power is too high or the laser coding time is too long, the composite film is easy to burn out, a scorching trace is generated on the surface of the composite film, and the prepared composite film cannot be used; if the laser coding power is too low or the laser coding time is too short, a composite film with a clear two-dimensional code pattern on the surface cannot be obtained.
Preferably, the power of the laser coding is 70%, and the time of the laser coding is 15 mus.
In a third aspect, the present invention provides the use of a composite film according to the first aspect in product packaging.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the design of the composite film structure, the white ink layer or the white polymer layer is further arranged, and the power and time of laser coding are controlled within a specific range, the composite film with a clear two-dimensional code pattern on the surface can be obtained, and meanwhile, an aluminum film in the aluminum-plated film layer can not be damaged, so that the prepared composite film is suitable for the field of product packaging.
Drawings
FIG. 1 is a schematic structural diagram of a composite membrane provided in example 1 of the present invention;
FIG. 2 is a schematic structural view of a composite membrane provided in example 13 of the present invention;
the ink comprises, by weight, 1-a first polymer layer, 2-a first ink layer, 3-a first glue layer, 4-a second polymer layer, 5-an aluminum-plated thin film layer, 6-a second glue layer, 7-a third polymer layer, 8-a two-dimensional code layer, 81-a white ink layer and 82-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:
BOPP: national style, conventional type;
LDPE (Low-Density polyethylene): hanhua, model LD 955; arkema, model OE 850;
VMPET: the type is conventional;
CPP: shuangjin, model extrusion and replication;
white PE: shanghai Zijiang color printing.
Example 1
The embodiment provides a composite film, a schematic structural diagram of which is shown in fig. 1, where the composite film includes a first polymer layer 1, a first ink layer 2, a first glue layer 3, a second polymer layer 4, an aluminum-plated thin film layer 5, a second glue layer 6, a third polymer layer 7, and a two-dimensional code layer 8, which are sequentially stacked;
the first polymer layer 1 is made of BOPP (biaxially-oriented polypropylene) and has the thickness of 25 mu m;
the thickness of the first ink layer 2 is 0.8 μm, and the thickness of the first glue layer 3 is 1.5 μm;
the second polymer layer 4 is an LDPE layer (prepared from LD955 and OE850 at a mass ratio of 4: 1) and has a thickness of 12 μm;
the aluminized surface of the aluminized thin film layer 5 is attached to the surface, away from the first glue layer 3, of the second polymer layer 4, the material is VMPET, and the thickness is 12 micrometers;
the thickness of the second glue layer 6 is 2 μm;
the third polymer layer 7 is an LDPE layer (LD955) with a thickness of 15 μm;
the two-dimensional code layer 8 comprises a white ink layer 81 and a transparent PE layer 82 which are attached to each other, wherein one surface of the white ink layer 81, which is far away from the transparent polymer layer 82, is attached to one surface of the third polymer layer 7, which is far away from the second glue layer 6;
the thickness of the white ink layer 81 is 1 μm;
the transparent polymer layer 82 is made of CPP and has a thickness of 40 μm.
The preparation method of the composite membrane comprises the following steps:
compounding a first polymer layer 1, a first ink layer 2, a first glue layer 3, a second polymer layer 4, an aluminum-plated thin film layer 5, a second glue layer 6, a third polymer layer 7 and a two-dimensional code layer 8 which are sequentially stacked, and then performing laser coding on one side, away from the third polymer layer 7, of the two-dimensional code layer 8 to obtain the packaging composite film; wherein the laser coding power is 70% and the time is 15 mus.
Example 2
This example provides a composite film, which differs from example 1 in that:
the thickness of the first polymer layer is 30 μm; the thickness of the first ink layer is 0.5 mu m, and the thickness of the first glue layer 3 is 1 mu m; the thickness of the second polymer layer is 10 μm; the thickness of the aluminized film layer is 15 micrometers; the thickness of the second glue layer is 1.2 mu m; the thickness of the third polymer layer is 14 μm; the thickness of the white ink layer is 0.9 mu m; the thickness of the transparent polymer layer is 30 μm; the laser coding power is 70%, and the time is 25 mu s;
other conditions were the same as in example 1.
Example 3
This example provides a composite film, which differs from example 1 in that:
the first polymer layer has a thickness of 25 μm; the thickness of the first ink layer is 0.7 mu m, and the thickness of the first glue layer 3 is 2 mu m; the thickness of the second polymer layer is 15 μm; the thickness of the aluminized film layer is 10 micrometers; the thickness of the second glue layer is 1 mu m; the thickness of the third polymer layer is 10 μm; the thickness of the white ink layer is 0.6 mu m; the thickness of the transparent polymer layer is 25 μm; the laser coding power is 80%, and the time is 20 mus;
other conditions were the same as in example 1.
Example 4
This example provides a composite film, which differs from example 1 in that:
the first polymer layer has a thickness of 20 μm; the thickness of the first ink layer is 1 μm, and the thickness of the first glue layer 3 is 1.8 μm; the thickness of the second polymer layer is 13 μm; the thickness of the aluminized film layer is 12 micrometers; the thickness of the second glue layer is 2 mu m; the thickness of the third polymer layer is 15 μm; the thickness of the white ink layer is 1 mu m; the thickness of the transparent polymer layer is 50 μm; the laser coding power is 70%, and the time is 20 mus;
other conditions were the same as in example 1.
Example 5
This example provides a composite film, which is different from example 1 only in that the laser coding power is 80%, and the other conditions are the same as example 1.
Example 6
This example provides a composite film, which is different from example 1 only in that the laser coding power is 90%, and the other conditions are the same as example 1.
Example 7
This example provides a composite film differing from example 1 only in that the laser coding power is 60%, and the other conditions are the same as example 1.
Example 8
This example provides a composite film, which is different from example 1 only in that the laser coding power is 95%, and the other conditions are the same as example 1.
Example 9
This example provides a composite film differing from example 1 only in that the laser coding time was 20 μ s, and the other conditions were the same as example 1.
Example 10
This example provides a composite film differing from example 1 only in that the laser coding time was 25 μ s, and the other conditions were the same as example 1.
Example 11
This example provides a composite film, which is different from example 1 only in that the laser coding time is 10 μ s, and other conditions are the same as example 1.
Example 12
This example provides a composite film differing from example 1 only in that the laser coding time was 30 μ s, and the other conditions were the same as example 1.
Example 13
The embodiment provides a composite film, a schematic structural diagram of which is shown in fig. 2, where the composite film includes a first polymer layer 1, a first ink layer 2, a first glue layer 3, a second polymer layer 4, an aluminum-plated thin film layer 5, a second glue layer 6, a third polymer layer 7, and a two-dimensional code layer 8, which are sequentially stacked;
the first polymer layer 1 is made of BOPP (biaxially-oriented polypropylene) and has the thickness of 18 mu m;
the thickness of the first ink layer 2 is 0.8 μm, and the thickness of the first glue layer 3 is 1.5 μm;
the second polymer layer 4 is a layer of LDPE (OE850) with a thickness of 12 μm;
the aluminized surface of the aluminized thin film layer 5 is attached to the surface, away from the first glue layer 3, of the second polymer layer 4, the material is VMPET, and the thickness is 12 micrometers;
the thickness of the second glue layer 6 is 2 μm;
the third polymer layer 7 is an LDPE layer with a thickness of 15 μm;
the two-dimensional code layer 8 is white PE and has a thickness of 50 μm.
The preparation method of the composite membrane comprises the following steps:
compounding a first polymer layer 1, a first ink layer 2, a first glue layer 3, a second polymer layer 4, an aluminum-plated thin film layer 5, a second glue layer 6, a third polymer layer 7 and a two-dimensional code layer 8 which are sequentially stacked, and then performing laser coding on one side, away from the third polymer layer 7, of the two-dimensional code layer 8 to obtain the packaging composite film; wherein the laser coding power is 70% and the time is 15 mus.
Comparative example 1
This comparative example provides a composite film, which is different from example 1 only in that the two-dimensional code layer does not include a white ink layer, and the other conditions are the same as example 1.
The composite membranes provided in the above examples and comparative examples were tested for their performance by the following methods:
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 composite films provided by the embodiment and the comparative example are complete and clear;
code scanning state: scanning the two-dimensional code layer on the inner layer of the composite film provided by the embodiment and the comparative example to check whether relevant information can be obtained.
The performance test results of the composite membranes provided in the above examples and comparative examples are shown in table 1 below:
TABLE 1
As can be seen from the content in table 1, the composite film with a clear two-dimensional code pattern on the surface can be obtained by designing the composite film structure, further setting the white ink layer or the white polymer layer, and controlling the power and time of laser coding within a specific range, and meanwhile, the aluminum film in the aluminum-plated film layer is not damaged, so that the prepared composite film is suitable for the product packaging field.
Compared with the embodiment 1, if the laser coding power is too low (embodiment 7), the two-dimensional code pattern obtained on the surface of the composite film is shallow, and the relevant information can be obtained through multiple times of scanning; if the laser coding power is too high (example 8), the two-dimensional code pattern obtained on the surface of the composite film is deep and cannot be scanned to obtain relevant information, and the composite film prepared by the method cannot be used.
Compared with the embodiment 1, if the laser coding time is too short (embodiment 11), the two-dimensional code pattern obtained on the surface of the composite film is shallow, and the relevant information can be obtained through multiple scanning; if the laser coding time is too long (example 12), the two-dimensional code pattern obtained on the surface of the composite film is too deep and cannot be scanned to obtain relevant information, and the composite film prepared by the method cannot be used.
In comparison with example 1, if the white ink layer is not provided in the composite film (comparative example 1), the aluminum film in the aluminum-plated thin film layer is perforated, and the composite film is damaged.
In summary, by designing the composite film structure, the white ink layer or the white polymer layer is further arranged, and the power and time of laser coding are controlled within a specific range, so that the composite film with a clear two-dimensional code pattern on the surface can be obtained, and meanwhile, the aluminum film in the aluminum-plated thin film layer is not damaged, and the prepared composite film is suitable for the product packaging field.
The applicant states that the present invention is illustrated by the above embodiments to show the detailed structural features and the detailed process flow of the present invention, but the present invention is not limited to the above detailed structural features and the detailed process flow, that is, the present invention is not meant to be implemented by relying on the above detailed structural features and the detailed process flow. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The composite film is characterized by comprising a first polymer layer, a first ink layer, a first glue layer, a second polymer layer, an aluminized film layer, a second glue layer, a third polymer layer and a two-dimensional code layer which are sequentially stacked;
the aluminized surface of the aluminized film layer is attached to the surface, away from the first glue layer, of the second polymer layer;
the two-dimensional code layer comprises a white ink layer and a transparent polymer layer which are attached to each other, wherein one surface of the white ink layer, which is far away from the transparent polymer layer, is attached to one surface of the third polymer layer, which is far away from the second glue layer;
or the two-dimensional code layer is a white polymer layer.
2. The composite film according to claim 1, wherein the first polymer layer is made of a material selected from the group consisting of BOPP, PET, and PA;
preferably, the thickness of the first polymer layer is 10 to 30 μm, and more preferably 10 to 25 μm.
3. Composite film according to claim 1 or 2, wherein the thickness of the first ink layer is less than or equal to 1 μm;
preferably, the thickness of the first glue layer is 1-2 μm.
4. A composite film according to any of claims 1 to 3 wherein the second polymer layer is an LDPE layer;
preferably, the thickness of the second polymer layer is 10 to 15 μm.
5. The composite film according to any one of claims 1 to 4, wherein the material of the aluminum-plated thin film layer is VMPET or VMOPP;
preferably, the thickness of the aluminum-plated thin film layer is 10-20 μm.
6. The composite film according to any one of claims 1 to 5, wherein the thickness of the second glue layer is 1 to 2 μm;
preferably, the third polymer layer is an LDPE layer;
preferably, the thickness of the third polymer layer is 10 to 15 μm.
7. A composite film according to any of claims 1 to 6 wherein the thickness of the layer of white ink is < 1 μm;
preferably, the thickness of the transparent polymer layer is more than or equal to 30 μm, and more preferably is 30-50 μm;
preferably, the thickness of the white polymer layer is 30 to 80 μm.
8. A method of making a composite membrane according to any of claims 1 to 7, comprising the steps of:
after a first polymer layer, a first ink layer, a first glue layer, a second polymer layer, an aluminum-plated thin film layer, a second glue layer, a third polymer layer and a two-dimensional code layer which are sequentially stacked are compounded, laser coding is carried out on one side, away from the third polymer, of the two-dimensional code layer, and the composite film is obtained.
9. The preparation method according to claim 8, wherein the laser coding power is 70-90% based on 100% of total laser coding power of 15W;
preferably, the laser coding time is 15-25 mu s;
preferably, the power of the laser coding is 70%, and the time of the laser coding is 15 mus.
10. Use of a composite film according to any of claims 1 to 7 in product packaging.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115958866A (en) * | 2023-03-16 | 2023-04-14 | 江苏康辉新材料科技有限公司 | Flame-retardant PET film suitable for laser coding and preparation method and application thereof |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203997433U (en) * | 2014-05-29 | 2014-12-10 | 江阴升辉包装材料有限公司 | A kind of digestion resistant food packing composite film |
| CN204210108U (en) * | 2014-09-24 | 2015-03-18 | 江阴申隆包装材料有限公司 | A kind of can laser coding easily tear packaging film and packaging bag |
| CN204406451U (en) * | 2014-12-31 | 2015-06-17 | 河南省卫群科技发展有限公司 | The holographic thermoprinted Quick Response Code mark of multimedia with miniature code |
| CN204659110U (en) * | 2015-02-11 | 2015-09-23 | 广东南海星格新型包装材料有限公司 | A kind of packaging film |
| CN105121173A (en) * | 2012-12-13 | 2015-12-02 | 角田新一郎 | Information writing film and sample storage body |
| CN205788864U (en) * | 2016-05-23 | 2016-12-07 | 李峰 | A kind of structure gilding film being suitable to cold wave |
| CN106695121A (en) * | 2017-01-09 | 2017-05-24 | 上海交通大学 | Cladding layer removing device and method through laser melting assisted by compressed air |
| CN206470800U (en) * | 2016-09-18 | 2017-09-05 | 天津市阿波罗信息技术有限公司 | A kind of structure for being suitable to label endowed adhesive sticker mark |
| CN107138859A (en) * | 2017-05-24 | 2017-09-08 | 江苏华工激光科技有限公司 | A kind of laser on-line marking method and apparatus of packaging material for surface coating |
| CN207302109U (en) * | 2017-07-27 | 2018-05-01 | 上海紫泉标签有限公司 | A kind of wrap-around label |
| CN110091567A (en) * | 2018-01-30 | 2019-08-06 | 上海久诚包装有限公司 | A kind of identification code anti-counterfeit stamping brush layer and printing process |
| CN110183930A (en) * | 2019-05-21 | 2019-08-30 | 福建合润包装涂料有限公司 | A kind of gloss oil and composite coating of Laser Jet |
| CN211968714U (en) * | 2019-12-25 | 2020-11-20 | 苏州昆岭薄膜工业有限公司 | High-barrier white BOPP aluminized film |
| CN213108497U (en) * | 2020-06-11 | 2021-05-04 | 上海福助工业有限公司 | Novel YOPP-VMPE composite membrane |
| CN213706338U (en) * | 2020-11-16 | 2021-07-16 | 内蒙古伊利实业集团股份有限公司 | Aluminum-free packaging structure with two-dimensional code |
| CN214730896U (en) * | 2021-01-13 | 2021-11-16 | 拍拍看(海南)人工智能有限公司 | Laser white bottom two-dimensional code packing material |
| CN113815280A (en) * | 2021-08-05 | 2021-12-21 | 黄山永新股份有限公司 | Easily-recycled high-barrier low-temperature heat-seal packaging composite film and production method thereof |
-
2022
- 2022-02-25 CN CN202210178210.4A patent/CN114536920B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121173A (en) * | 2012-12-13 | 2015-12-02 | 角田新一郎 | Information writing film and sample storage body |
| CN203997433U (en) * | 2014-05-29 | 2014-12-10 | 江阴升辉包装材料有限公司 | A kind of digestion resistant food packing composite film |
| CN204210108U (en) * | 2014-09-24 | 2015-03-18 | 江阴申隆包装材料有限公司 | A kind of can laser coding easily tear packaging film and packaging bag |
| CN204406451U (en) * | 2014-12-31 | 2015-06-17 | 河南省卫群科技发展有限公司 | The holographic thermoprinted Quick Response Code mark of multimedia with miniature code |
| CN204659110U (en) * | 2015-02-11 | 2015-09-23 | 广东南海星格新型包装材料有限公司 | A kind of packaging film |
| CN205788864U (en) * | 2016-05-23 | 2016-12-07 | 李峰 | A kind of structure gilding film being suitable to cold wave |
| CN206470800U (en) * | 2016-09-18 | 2017-09-05 | 天津市阿波罗信息技术有限公司 | A kind of structure for being suitable to label endowed adhesive sticker mark |
| CN106695121A (en) * | 2017-01-09 | 2017-05-24 | 上海交通大学 | Cladding layer removing device and method through laser melting assisted by compressed air |
| CN107138859A (en) * | 2017-05-24 | 2017-09-08 | 江苏华工激光科技有限公司 | A kind of laser on-line marking method and apparatus of packaging material for surface coating |
| CN207302109U (en) * | 2017-07-27 | 2018-05-01 | 上海紫泉标签有限公司 | A kind of wrap-around label |
| CN110091567A (en) * | 2018-01-30 | 2019-08-06 | 上海久诚包装有限公司 | A kind of identification code anti-counterfeit stamping brush layer and printing process |
| CN110183930A (en) * | 2019-05-21 | 2019-08-30 | 福建合润包装涂料有限公司 | A kind of gloss oil and composite coating of Laser Jet |
| CN211968714U (en) * | 2019-12-25 | 2020-11-20 | 苏州昆岭薄膜工业有限公司 | High-barrier white BOPP aluminized film |
| CN213108497U (en) * | 2020-06-11 | 2021-05-04 | 上海福助工业有限公司 | Novel YOPP-VMPE composite membrane |
| CN213706338U (en) * | 2020-11-16 | 2021-07-16 | 内蒙古伊利实业集团股份有限公司 | Aluminum-free packaging structure with two-dimensional code |
| CN214730896U (en) * | 2021-01-13 | 2021-11-16 | 拍拍看(海南)人工智能有限公司 | Laser white bottom two-dimensional code packing material |
| CN113815280A (en) * | 2021-08-05 | 2021-12-21 | 黄山永新股份有限公司 | Easily-recycled high-barrier low-temperature heat-seal packaging composite film and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115958866A (en) * | 2023-03-16 | 2023-04-14 | 江苏康辉新材料科技有限公司 | Flame-retardant PET film suitable for laser coding and preparation method and application thereof |
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|---|---|
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