CN117089294A - Packaging material with laser effect and preparation process thereof - Google Patents
Packaging material with laser effect and preparation process thereof Download PDFInfo
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- CN117089294A CN117089294A CN202311165304.9A CN202311165304A CN117089294A CN 117089294 A CN117089294 A CN 117089294A CN 202311165304 A CN202311165304 A CN 202311165304A CN 117089294 A CN117089294 A CN 117089294A
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- 239000005022 packaging material Substances 0.000 title claims abstract description 29
- 230000000694 effects Effects 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 143
- 238000000576 coating method Methods 0.000 claims abstract description 143
- 238000012546 transfer Methods 0.000 claims abstract description 51
- 238000001035 drying Methods 0.000 claims abstract description 44
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000011888 foil Substances 0.000 claims abstract description 40
- 230000004888 barrier function Effects 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 12
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 12
- 229920002799 BoPET Polymers 0.000 claims description 41
- 239000003292 glue Substances 0.000 claims description 24
- 239000013154 zeolitic imidazolate framework-8 Substances 0.000 claims description 22
- MFLKDEMTKSVIBK-UHFFFAOYSA-N zinc;2-methylimidazol-3-ide Chemical compound [Zn+2].CC1=NC=C[N-]1.CC1=NC=C[N-]1 MFLKDEMTKSVIBK-UHFFFAOYSA-N 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000013329 compounding Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 239000002966 varnish Substances 0.000 claims description 10
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 9
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 9
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 9
- 239000008103 glucose Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 claims 1
- 239000010410 layer Substances 0.000 description 152
- 239000000203 mixture Substances 0.000 description 8
- 239000003205 fragrance Substances 0.000 description 6
- -1 polyoxyethylene Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses a packaging material with a laser effect, which comprises the following components: the application relates to a preparation process of a packaging material with a laser effect, which comprises an information layer, an ink layer, a transfer layer, a base coat and a substrate layer which are sequentially arranged from top to bottom, wherein the substrate layer is obtained by coating a barrier coating on the lower surface of an aluminum foil and drying the barrier coating, and the barrier coating is prepared by dissolving a Z I F-8 material in a polyethylene glycol and acetone solution.
Description
Technical Field
The application relates to the technical field of packaging materials, in particular to a packaging material with a laser effect and a preparation process thereof.
Background
When the product is sold, the packaging bag is required to be used for packaging, in order to prevent the invasion of counterfeit and inferior products to brands, manufacturers often use packaging materials with laser information for product packaging, so that the packaging attractiveness can be improved, meanwhile, the anti-counterfeiting function is realized, and the commodity identification is increased.
However, the influence of the external environment on the product is also required to be considered in the storage process of the product, so that the anti-counterfeiting function is achieved, and meanwhile, the barrier property of the packaging material to the external environment is improved, so that the influence of the external environment on the product is reduced to the maximum extent, and the problem to be solved is solved.
Disclosure of Invention
The application overcomes the defects of the prior art and provides a packaging material with a laser effect and a preparation process thereof.
In order to achieve the above purpose, the application adopts the following technical scheme: a packaging material with a laser effect, comprising: the information layer, the ink layer, the transfer layer, the bottom coating and the substrate layer are sequentially arranged from top to bottom;
the substrate layer is obtained by coating a barrier coating on the lower surface of an aluminum foil and drying the barrier coating, wherein the barrier coating is prepared by dissolving a ZIF-8 material in polyethylene glycol and acetone solution.
In a preferred embodiment of the present application, the ZIF-8 material is obtained by the following method: zinc ions and 2-methylimidazole are dissolved in acetone and mixed according to a certain weight ratio, heated for 1-3 hours at 50-80 ℃ and stirred, cooled to room temperature and then washed, and then dried by nitrogen.
In a preferred embodiment of the present application, the information layer partially overlaps the ink layer, and the information layer pattern exhibits a laser effect in cooperation with the ink layer at the overlapping portion.
In a preferred embodiment of the present application, the transfer layer material composition comprises an aqueous transfer gum comprising glucose.
In a preferred embodiment of the application, the bottom coating is obtained by coating a light-shielding coating on the upper surface of an aluminum foil and drying, wherein the light-shielding coating comprises the following raw materials in parts by mass: 2-8 parts of adhesive, 0.5-2 parts of solubilizer, 0.5-2 parts of stearic acid and 1-6 parts of light absorbing powder.
In a preferred embodiment of the application, the transfer layer has a thickness of 40-100 μm.
In a preferred embodiment of the present application, a VC glue layer is disposed at the bottom of the substrate layer, and the raw material of the VC glue layer includes a resin substrate, where the resin substrate is selected from acrylic resin, vinyl chloride-vinyl acetate resin, polyester resin, or a combination thereof.
In a preferred embodiment of the present application, the present application further includes a process for preparing a packaging material having a laser effect, including the steps of:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
dissolving zinc ions and 2-methylimidazole in acetone, mixing, stirring for 1-3 hours at 50-80 ℃, cooling to room temperature, filtering, washing, introducing nitrogen, drying to prepare ZIF-8 material, taking 2-5 parts of ZIF-8 material, 5-10 parts of acetone and 15-20 parts of polyethylene glycol, putting into a container, uniformly mixing to obtain a barrier coating, coating the barrier coating on the lower surface of an aluminum foil, and drying to obtain a substrate layer;
s3, preparing a shading coating, and coating the shading coating on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 2-8 parts by weight of adhesive, 0.5-2 parts by weight of solubilizer, 0.5-2 parts by weight of stearic acid and 1-6 parts by weight of light absorbing powder to obtain a shading coating, coating the shading coating on the upper surface of an aluminum foil layer, and drying for 5-10 min at 70-110 ℃ under hot air to obtain a primer layer;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
coating aqueous transfer glue containing glucose on the upper surface of the bottom coating obtained in the step S3, drying to obtain a transfer layer, wherein the coating dry weight is 1.2-1.5g/m < 2 >, and then drying at 120-160 ℃ for 5-10S;
then laminating the pre-provided laser PET film on the transfer layer, and curing after compounding, wherein the curing environment temperature is 50-60 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (4) stripping the PET film on the surface of the semi-finished film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating varnish coating on the surface of the exposed information layer to form a varnish layer, simultaneously coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing.
The application solves the defects existing in the background technology, and has the following beneficial effects:
ZIF-8 materials have permanent porosity, high surface area, hydrophobicity, open metal sites and excellent water stability, ZIF-8 materials have 1630g/m 2 Is 0.63g/m 3 The ZIF-8 material, polyethylene glycol and acetone are placed into a container to be uniformly mixed to prepare mixed liquid, the mixed liquid is coated on the surface of an aluminum foil layer by coating liquid, so that the moisture and smell of a packaged product are reduced and outwards scattered, the effect of fragrance and moisture retention is achieved, a plurality of layers are added on the traditional aluminum foil, the packaging material is thickened, the fragrance and moisture retention blocking function of the packaging material is further improved, and in addition, a base coat is formed by coating a shading paint on the upper surface of the aluminum foil, so that the product has certain shading property.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
fig. 1 is a schematic view of the structure of a packaging material according to a preferred embodiment of the present application.
In the figure: 1. a laser PET film; 2. a gloss oil layer; 3. an information layer; 4. an ink layer; 5. a transfer layer; 6. a primer layer; 7. a substrate layer; 8. and a VC adhesive layer.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
As shown in fig. 1, a packaging material with laser effect includes: the information layer, the ink layer, the transfer layer, the base coat and the substrate layer which are sequentially arranged from top to bottom are arranged on the traditional aluminum foil, so that a plurality of layers are added, the packaging material is thickened, and the moisture and fragrance retaining barrier function of the aluminum foil packaging material is improved.
The substrate layer is obtained by coating a barrier coating on the lower surface of an aluminum foil and drying, wherein the barrier coating is prepared by dissolving a ZIF-8 material in polyethylene glycol and acetone solution, and the ZIF-8 material is obtained by the following steps: zinc ions and 2-methylimidazole are dissolved in acetone and mixed according to a certain weight ratio, the mixture is heated for 1-3 hours at the temperature of 50-80 ℃ and stirred, the mixture is cooled to room temperature and then washed, then the mixture is dried by nitrogen, ZIF-8 materials, polyethylene glycol and acetone are put into a container and are uniformly mixed to prepare mixed solution, the mixed solution is coated on the surface of an aluminum foil layer by coating solution, so that the outward dissipation of moisture and smell of a packaged product is reduced, and the effects of fragrance preservation and moisture preservation are achieved.
In a preferred embodiment of the present application, the information layer partially overlaps the ink layer, and the information layer pattern exhibits a laser effect in cooperation with the ink layer at the overlapping portion.
In a preferred embodiment of the application, the transfer layer comprises an aqueous transfer gel comprising glucose.
In a preferred embodiment of the application, the bottom coating is obtained by coating a light-shielding coating on the upper surface of an aluminum foil and drying, wherein the light-shielding coating comprises the following raw materials in parts by mass: 2-8 parts of adhesive, 0.5-2 parts of solubilizer, 0.5-2 parts of stearic acid and 1-6 parts of light absorbing powder.
In a preferred embodiment of the application, the transfer layer has a thickness of 40-100 μm.
In a preferred embodiment of the present application, a VC glue layer is disposed at the bottom of the substrate layer, and the VC glue layer includes a resin substrate selected from an acrylic resin, a vinyl chloride-vinyl acetate resin, a polyester resin, or a combination thereof.
In a preferred embodiment of the present application, the present application further includes a process for preparing a packaging material having a laser effect, including the steps of:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
zinc ions and 2-methylimidazole are dissolved in acetone and mixed, the mixture is stirred for 1 to 3 hours at the temperature of 50 to 80 ℃, the mixture is cooled to room temperature, filtered and washed, nitrogen is introduced to blow the mixture to prepare ZIF-8 material, 2 to 5 parts of ZIF-8 material and 5 to 10 parts of acetone are taken, 15 to 20 parts of polyethylene glycol are put into a container and uniformly mixed, the mixture reacts for 40 to 50 hours at the constant temperature of 100 to 150 ℃ to obtain barrier coating, the barrier coating is coated on the lower surface of an aluminum foil, and the substrate layer is obtained after drying;
s3, preparing a shading material, and coating the shading material on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 2-8 parts of adhesive, 0.5-2 parts of solubilizer, 0.5-2 parts of stearic acid and 1-6 parts of light absorbing powder to obtain a shading coating, coating the shading coating on the upper surface of an aluminum foil layer, and then drying for 5-10 min under the hot air of 70-110 ℃ to obtain a bottom coating;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
coating a transfer layer on the upper surface of the bottom coating obtained in the step S3, wherein the transfer layer comprises aqueous transfer glue containing glucose, the coating dry weight is 1.2-1.5g/m < 2 >, and then drying is carried out, the drying temperature is 120-160 ℃, and the time is 5-10S;
compounding the pre-provided laser PET film with the substrate layer through the transfer layer, and curing after compounding, wherein the curing environment temperature is 50-60 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (3) placing the semi-finished film obtained in the step (4) on a PET film stripping device, stripping the laser PET film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating varnish coating on the surface of the exposed information layer to form a varnish layer, simultaneously spot-coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing for a certain time.
The process of the present application is illustrated by the following specific examples, it being understood that these examples are illustrative of the basic principles, main features and advantages of the present application, and the present application is not limited by the scope of the following examples; the implementation conditions employed in the examples may be further adjusted according to specific requirements, and the implementation conditions not specified are generally those in routine experiments.
Example 1:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
dissolving zinc ions and 2-methylimidazole in 2:10 parts by weight into acetone, mixing, heating at 60 ℃ for 2.5 hours, stirring, cooling to room temperature, flushing, drying with nitrogen to prepare ZIF-8 material, taking 5 parts by weight of ZIF-8 material, 10 parts by weight of acetone and 20 parts by weight of polyethylene glycol, placing into a container, uniformly mixing and reacting for 50 hours to obtain a barrier coating, coating the barrier coating on the lower surface of an aluminum foil, and drying at 95 ℃ to obtain a substrate layer;
s3, preparing a shading coating, and coating the shading coating on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 6 parts by weight of adhesive, 1 part by weight of solubilizer, 1 part by weight of stearic acid and 4 parts by weight of light-absorbing powder to obtain a light-shielding coating (wherein the adhesive is polyvinyl alcohol, the solubilizer is polyoxyethylene fatty acid ester and the light-absorbing powder is black nano particles), coating the light-shielding coating on the upper surface of an aluminum foil layer by using a coating machine, and drying for 8min under 80 ℃ hot air to obtain a base coat;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
the upper surface of the bottom coating layer obtained in the step S3 is coated with a transfer layer coating material by a coater, and the coating dry weight of the coater is 1.2g/m 2 The transfer layer comprises aqueous transfer glue containing glucose, and is put into a drying box with the drying temperature of 120 ℃ for drying after coating is finished, and the drying time is 8S, so that the transfer layer is obtained;
compounding the transfer layer and the substrate layer which are obtained by the laser PET film in advance, and curing after compounding, wherein the curing environment temperature is 55 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (3) placing the semi-finished film obtained in the step (S4) on a PET film stripping device, stripping the laser PET film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating a gloss oil coating on the surface of the exposed information layer to form a gloss oil layer, simultaneously coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing.
Example 2:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
dissolving zinc ions and 2-methylimidazole in 2:10 parts by weight into acetone, mixing, heating at 60 ℃ for 2.5 hours, stirring, cooling to room temperature, flushing, drying with nitrogen to prepare ZIF-8 material, putting 3 parts of ZIF-8 material, 6 parts of acetone and 15 parts of polyethylene glycol into a container, uniformly mixing and reacting for 46 hours to obtain a barrier coating, coating the barrier coating on the lower surface of an aluminum foil, and drying at 85 ℃ to obtain a substrate layer;
s3, preparing a shading material, and coating the shading material on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 6 parts by weight of adhesive, 1 part by weight of solubilizer, 1 part by weight of stearic acid and 4 parts by weight of light-absorbing powder to obtain a light-shielding coating (wherein the adhesive is polyvinyl alcohol, the solubilizer is polyoxyethylene fatty acid ester and the light-absorbing powder is black nano particles), coating the light-shielding coating on the upper surface of an aluminum foil layer by using a coating machine, and drying for 8min under 80 ℃ hot air to obtain a base coat;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
the upper surface of the bottom coating layer obtained in the step S3 is coated with a transfer layer coating material by a coater, and the coating dry weight of the coater is 1.2g/m 2 The transfer layer comprises aqueous transfer glue containing glucose, and is put into a drying box with the drying temperature of 120 ℃ for drying after coating is finished, and the drying time is 8S, so that the transfer layer is obtained;
compounding the transfer layer and the substrate layer which are obtained by the laser PET film in advance, and curing after compounding, wherein the curing environment temperature is 50 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (3) placing the semi-finished film obtained in the step (S4) on a PET film stripping device to strip the laser PET film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating varnish coating on the surface of the exposed information layer to form a varnish layer, simultaneously coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing.
Example 3:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
dissolving zinc ions and 2-methylimidazole in 2:10 parts by weight into acetone, mixing, heating at 60 ℃ for 2.5 hours, stirring, cooling to room temperature, flushing, drying with nitrogen to prepare ZIF-8 material, taking 4 parts by weight of ZIF-8 material, 8 parts by weight of acetone and 17 parts by weight of polyethylene glycol, placing into a container, uniformly mixing and reacting for 48 hours to obtain a barrier coating, coating the barrier coating on the lower surface of an aluminum foil, and drying at 85 ℃ to obtain a substrate layer;
s3, preparing a shading material, and coating the shading material on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 8 parts by weight of adhesive, 2 parts by weight of solubilizer, 2 parts by weight of stearic acid and 6 parts by weight of light-absorbing powder to obtain a light-shielding coating (wherein the adhesive is polyvinyl alcohol, the solubilizer is polyoxyethylene fatty acid ester and the light-absorbing powder is black nano particles), coating the light-shielding coating on the upper surface of an aluminum foil layer by using a coating machine, and drying for 10min under hot air at 100 ℃ to obtain a base coat;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
the upper surface of the bottom coating layer obtained in the step S3 is coated with a transfer layer coating material by a coater, and the coating dry weight of the coater is 1.2g/m 2 The transfer layer comprises aqueous transfer glue containing glucose, and is put into a drying box with the drying temperature of 120 ℃ for drying after coating is finished, and the drying time is 8S, so that the transfer layer is obtained;
compounding the transfer layer and the substrate layer which are obtained by the laser PET film in advance, and curing after compounding, wherein the curing environment temperature is 50-60 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (3) placing the semi-finished film obtained in the step (S4) on a PET film stripping device to strip the laser PET film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating varnish coating on the surface of the exposed information layer to form a varnish layer, simultaneously coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing for a certain time.
Comparative example 1: the difference from example 1 is that the barrier coating is not applied to the lower surface of the aluminum foil layer.
Comparative example 2: the difference from example 1 is that the upper surface of the aluminum foil layer is not coated with a light-shielding paint.
The packaging materials prepared in example 1, example 2, example 3 and comparative examples 1 and 2 were subjected to the tests of barrier properties and light shielding properties.
The water and oxygen permeability test method is tested according to YBB 000152002-2015;
the transmittance was measured by a spectrophotometer with pure water as a reference, and at this time, the transmittance of pure water was set to 100%.
The test results are shown in the following table:
| project | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Water permeable WTR (g/mday) | 0.07 | 0.09 | 0.10 | 0.35 | 0.18 |
| Oxygen permeable OTR (cc/mday) | 0.12 | 0.14 | 0.17 | 0.40 | 0.22 |
| Transmittance of light | 8％ | 10％ | 5％ | 30％ | 60％ |
By combining the test results, the laser aluminum foil packaging material prepared by the method has good light shielding performance and fragrance and moisture preserving performance, and can solve the problems of poor light shielding performance and poor fragrance and moisture preserving effect of the packaging material in the prior art.
The above-described preferred embodiments according to the present application are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. A packaging material with a laser effect, comprising: the information layer, the ink layer, the transfer layer, the bottom coating and the substrate layer are sequentially arranged from top to bottom;
the substrate layer is obtained by coating a barrier coating on the lower surface of an aluminum foil and drying the barrier coating, wherein the barrier coating is prepared by dissolving a ZIF-8 material in polyethylene glycol and acetone solution.
2. The packaging material with laser effect according to claim 1, wherein: the ZIF-8 material is obtained by the following method: zinc ions and 2-methylimidazole are dissolved in acetone and mixed according to a certain weight ratio, heated for 1-3 hours at 50-80 ℃ and stirred, cooled to room temperature and then washed, and then dried by nitrogen.
3. The packaging material with laser effect according to claim 1, wherein: the information layer is partially overlapped with the ink layer, and the information layer pattern is matched with the ink layer to present a laser effect at the overlapped part.
4. The packaging material with laser effect according to claim 1, wherein: the raw material component of the transfer layer is aqueous transfer glue containing glucose.
5. The packaging material with laser effect according to claim 1, wherein: the base coat is obtained by coating a light-shielding coating on the upper surface of an aluminum foil and drying, wherein the light-shielding coating comprises the following raw materials in parts by mass: 2-8 parts of adhesive, 0.5-2 parts of solubilizer, 0.5-2 parts of stearic acid and 1-6 parts of light absorbing powder.
6. The packaging material with laser effect according to claim 4, wherein: the thickness of the transfer layer is 40-100 mu m.
7. The packaging material with laser effect according to claim 4, wherein: the base material layer is characterized in that a VC glue layer is arranged at the bottom of the base material layer, and the raw material of the VC glue layer comprises a resin base material, wherein the resin base material is selected from acrylic resin, vinyl chloride-vinyl acetate copolymer, polyester resin or a combination thereof.
8. A process for preparing a packaging material with laser effect according to any one of claims 1-7, comprising the steps of:
s1, a laser PET film is provided in advance, an information layer and an ink layer are sequentially arranged on the bottom surface of the laser PET film, and the information layer and the ink layer are combined to form a laser layer;
s2, preparing a barrier coating, and coating the barrier coating on the lower surface of the aluminum foil to obtain a substrate layer:
dissolving zinc ions and 2-methylimidazole in acetone, mixing, stirring for 1-3 hours at 50-80 ℃, cooling to room temperature, filtering, washing, introducing nitrogen, drying to prepare ZIF-8 material, taking 2-5 parts of ZIF-8 material, 5-10 parts of acetone and 15-20 parts of polyethylene glycol, putting into a container, uniformly mixing to obtain a barrier coating, coating the barrier coating on the lower surface of an aluminum foil, and drying to obtain a substrate layer;
s3, preparing a shading coating, and coating the shading coating on the upper surface of the aluminum foil layer to obtain a bottom coating:
uniformly mixing 2-8 parts by weight of adhesive, 0.5-2 parts by weight of solubilizer, 0.5-2 parts by weight of stearic acid and 1-6 parts by weight of light absorbing powder to obtain a shading coating, coating the shading coating on the upper surface of an aluminum foil layer, and drying for 5-10 min at 70-110 ℃ under hot air to obtain a primer layer;
s4, compounding the laser PET film with the substrate layer through the transfer layer to obtain a semi-finished film:
coating aqueous transfer gum containing glucose on the upper surface of the bottom coating obtained in the step S3, and drying to obtain a transfer layer, wherein the coating dry weight is 1.2-1.5g/m 2 Then drying, wherein the drying temperature is 120-160 ℃ and the drying time is 5-10S;
then laminating the pre-provided laser PET film on the transfer layer, and curing after compounding, wherein the curing environment temperature is 50-60 ℃, the curing environment humidity is controlled to be less than or equal to 50%, and the curing time is 24 hours, so as to obtain a semi-finished film;
s5, stripping the laser PET film:
and (4) stripping the PET film on the surface of the semi-finished film, transferring the stripped information layer and the stripped ink layer to the upper part of the transfer layer, then coating varnish coating on the surface of the exposed information layer to form a varnish layer, simultaneously coating VC glue on the bottom surface of the substrate layer to form a VC glue layer, and cutting to the required specification after curing.
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| CN202311165304.9A CN117089294A (en) | 2023-09-11 | 2023-09-11 | Packaging material with laser effect and preparation process thereof |
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| CN202311165304.9A CN117089294A (en) | 2023-09-11 | 2023-09-11 | Packaging material with laser effect and preparation process thereof |
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