CN108016203B - aluminum-washing composite packaging film and preparation method thereof - Google Patents
aluminum-washing composite packaging film and preparation method thereof Download PDFInfo
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- CN108016203B CN108016203B CN201711155492.1A CN201711155492A CN108016203B CN 108016203 B CN108016203 B CN 108016203B CN 201711155492 A CN201711155492 A CN 201711155492A CN 108016203 B CN108016203 B CN 108016203B
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- 239000012785 packaging film Substances 0.000 title claims abstract description 61
- 229920006280 packaging film Polymers 0.000 title claims abstract description 61
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000005406 washing Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 208
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 207
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 83
- 239000010410 layer Substances 0.000 claims abstract description 76
- 239000011888 foil Substances 0.000 claims abstract description 59
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 238000000059 patterning Methods 0.000 claims abstract description 7
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011978 dissolution method Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 2
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 2
- 229920006267 polyester film Polymers 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 4
- 238000007738 vacuum evaporation Methods 0.000 abstract description 3
- 238000007639 printing Methods 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical group [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000000463 material Substances 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
- 238000000465 moulding Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
- C23C14/5873—Removal of material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The invention provides an aluminum-washing composite packaging film and a preparation method thereof, relates to the field of packaging, and aims to reduce the evaporation difficulty of an aluminum film layer and ensure that the purity of the evaporated aluminum film layer is higher. The aluminum-washing composite packaging film comprises an aluminum foil layer covering a substrate film on the surface of the substrate film through vacuum evaporation; patterning the aluminum foil layer according to a set pattern to obtain a hollow aluminum film, and forming a cured photoresist in an aluminum foil hollow area of the hollow aluminum film; forming a color resistor on the surface of the hollow aluminum film; and forming a surface layer film on the surface of the color resists and the surface of the cured photoresist. The aluminum washing composite packaging film is prepared by the preparation method, and the aluminum washing composite packaging film and the preparation method thereof provided by the invention are used for aluminum washing packaging bags.
Description
Technical Field
The invention relates to the field of packaging, in particular to an aluminum-washing composite packaging film and a preparation method thereof.
Background
the aluminum-washing composite packaging film is a composite film formed by compounding plastic films and locally hollowing and aluminizing, and has the characteristics of clear image and text, high accuracy, high stereoscopic impression and bright color.
When the aluminum-washing composite packaging film is manufactured, multicolor printing is firstly carried out on the film, so that color ink is printed on a substrate film according to a set pattern, then a high-temperature-resistant gloss oil layer is printed on the patterned color ink, a water-soluble gloss oil layer is printed on the surface of the substrate film without the printed patterned color ink, and then an aluminum film layer is evaporated in vacuum on the high-temperature-resistant gloss oil layer and the water-soluble gloss oil layer to obtain a printed film; the printing film is placed on an unwinding roller of aluminum washing equipment, friction between the printing film and a cleaning roller is increased through an aluminum washing driving roller in a clean water tank, the part of the aluminum film layer corresponding to the water-soluble varnish is stripped from the printing film, so that the aluminum film layer in the printing film is patterned, and finally, a surface film is compounded on the patterned aluminum film layer, so that the aluminum washing composite packaging film is formed.
However, the printed high temperature resistant gloss oil layer and the water soluble gloss oil layer often contain residual organic solvents, so that when the aluminum film layer is evaporated in vacuum, the organic solvents are easily released into the vacuum chamber in a vacuum environment, the vacuum degree of the vacuum chamber is insufficient, and the difficulty of evaporating the aluminum film layer on the high temperature resistant gloss oil layer and the water soluble gloss oil layer is relatively large.
in order to decorate the aluminum-washed composite packaging film, generally, a planarization layer is formed on the surface of a patterned aluminum film layer, then a patterned color resist is formed on the surface of the planarization layer to decorate the patterned aluminum film layer, and finally a surface film is formed on the surface of the color resist and the planarization layer. Although this process can improve the aesthetic properties of aluminum-washed composite packaging films, the color resists are easily peeled from the surface of the planarization layer due to the layered structure.
disclosure of Invention
the invention aims to provide an aluminum-washed composite packaging film and a preparation method thereof, which are used for reducing the evaporation difficulty of an aluminum film layer, improving the purity of the evaporated aluminum film layer and preventing color resists from peeling.
in order to achieve the purpose, the invention adopts the following technical scheme:
A preparation method of an aluminum-washing composite packaging film comprises the following steps:
step S1: providing a substrate film;
step S2: vacuum evaporating an aluminum foil layer covering the substrate film on the surface of the substrate film;
step S3: patterning the aluminum foil layer according to a set pattern to obtain a hollow aluminum film; the pattern of the hollow aluminum film corresponds to a set pattern;
Step S4: forming a cured photoresist in the aluminum foil hollow area of the hollow aluminum film; the thickness of the cured photoresist is greater than that of the hollow aluminum film;
Step S5: forming a color resistance on the surface of the hollow aluminum film by adopting an ink-jet printing method;
step S7: and forming a surface layer film on the surface of the color resistor and the surface of the solidified photoresist.
compared with the prior art, the preparation method of the aluminum-washing composite packaging film provided by the invention comprises the steps of firstly carrying out vacuum evaporation on the surface of a substrate film to form an aluminum foil layer covering the substrate film, then patterning the aluminum foil layer according to a set pattern to obtain a hollowed-out aluminum film, and enabling the pattern of the hollowed-out aluminum film to correspond to the set pattern; therefore, the preparation method of the aluminum-washing composite packaging film provided by the invention omits the steps of printing the patterned ink on the surface of the substrate film and coating the high-temperature-resistant gloss oil layer and the water-soluble gloss oil layer, and can avoid the influence of a solvent on the evaporated aluminum foil layer when the aluminum foil layer is directly evaporated on the surface of the substrate film in vacuum, so that the evaporation difficulty of the aluminum foil layer is reduced, and the impurities brought into the aluminum foil layer by the solvent are reduced, thereby ensuring the quality of the prepared hollow aluminum film.
Moreover, the solidified photoresist is formed in the aluminum foil hollowed-out area of the hollowed-out aluminum film, so that the solidified photoresist can be used as a packaging film framework to support the hollowed-out aluminum film, and the hollowed-out aluminum film and the solidified photoresist can form a concave structure due to the fact that the thickness of the solidified photoresist is larger than that of the hollowed-out aluminum film; at the moment, the hollow aluminum film is equivalent to the bottom of the recessed structure, and the cured photoresist is equivalent to the side wall of the recessed structure, so that when a color resistor covering the surface of the hollow aluminum film is formed in the recessed structure formed by the cured photoresist and the hollow aluminum film, the cured photoresist can be used as a packaging film framework support and can be used for molding the color resistor, the stability and the strength of the color resistor are improved, the cured photoresist can be used as a part of the recessed structure to enable the color resistor to be embedded into the recessed structure, and the color resistor is prevented from being stripped; moreover, with during the colored colour hinders the embedding to the sunk structure, need not to set up the planarization layer to prior art like the surface at the fretwork aluminium membrane, this thickness that has just also thinned compound washing aluminium packaging film.
The invention also provides an aluminum-washing composite packaging film prepared by the preparation method in the technical scheme, which comprises a substrate film and the hollowed-out aluminum film formed on the surface of the substrate film, wherein the aluminum foil hollowed-out area of the hollowed-out aluminum film is filled with cured photoresist serving as a packaging film framework, a color resist covering the surface of the hollowed-out aluminum film is formed in a recessed structure formed by the cured photoresist and the hollowed-out aluminum film, and surface layer films are formed on the surface of the cured photoresist and the surface of the hollowed-out aluminum film.
Compared with the prior art, the beneficial effects of the aluminum-washing composite packaging film provided by the invention are the same as the preparation method of the aluminum-washing composite packaging film provided by the technical scheme, and the details are not repeated herein.
Drawings
the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a process diagram of the aluminum-washed composite packaging film according to an embodiment of the present invention;
FIG. 2 is a first flow chart of an aluminum-washed composite packaging film according to an embodiment of the present invention;
FIG. 3 is a second flow chart of the aluminum-washed composite packaging film provided by the embodiment of the present invention;
wherein:
1-substrate film, 2-hollow aluminum film;
20-aluminum foil layer, 200-photoresist;
21-curing photoresist, 3-color resistance;
4-color protective film, 5-surface film;
6-cold sealing glue, A-hollowed-out area of aluminum foil.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the preparation method of the aluminum-washed composite packaging film provided by the embodiment of the invention comprises the following steps:
step S1: providing a substrate film 1;
Step S2: vacuum evaporating an aluminum foil layer 20 covering the substrate film 1 on the surface of the substrate film 1;
step S3: patterning the aluminum foil layer 20 according to a set pattern to obtain a hollow aluminum film 2; the pattern of the hollow aluminum film 2 corresponds to a set pattern;
Step S4: forming a cured photoresist 21 in the aluminum foil hollow area A of the hollow aluminum film 2, wherein the thickness of the cured photoresist 21 is greater than that of the hollow aluminum film 2;
step S5: forming a color resistor 3 on the surface of the hollow aluminum film 2;
Step S7: a surface layer film 5 is formed on the surface of the color resists 3 and the surface of the cured resist 21.
wherein, the substrate film 1 and the surface film 5 are both biaxially oriented polypropylene films or polyester films.
Based on the process of the preparation method of the aluminum washing composite packaging film, the aluminum foil layer 20 covering the substrate film 1 is evaporated in vacuum on the surface of the substrate film 1, then the aluminum foil layer 20 is patterned according to the set pattern to obtain the hollowed-out aluminum film 2, the pattern of the hollowed-out aluminum film 2 corresponds to the set pattern, and finally the surface film 5 covering the hollowed-out aluminum film 2 and the aluminum foil hollowed-out area A of the hollowed-out aluminum film 2 is formed on the surface of the hollowed-out aluminum film 2, so that the preparation method of the aluminum washing composite packaging film provided by the embodiment of the invention omits the steps of printing patterned ink on the surface of the substrate film 1 and coating a high-temperature-resistant gloss oil layer and a water-soluble gloss oil layer, and can avoid the influence of a solvent on the evaporated foil layer 20 when the aluminum foil layer 20 is directly evaporated in vacuum on the surface of the substrate film 1, thereby reducing the evaporation difficulty of the aluminum foil layer, thereby ensuring the quality of the manufactured hollow aluminum film 2.
Moreover, the solidified photoresist 21 is formed in the aluminum foil hollowed-out area A of the hollowed-out aluminum film 2, so that the solidified photoresist 21 can be used as a packaging film framework to support the hollowed-out aluminum film 2, and the hollowed-out aluminum film 2 and the solidified photoresist 21 can form a concave structure because the thickness of the solidified photoresist 21 is greater than that of the hollowed-out aluminum film 2; at this time, the hollow aluminum film 2 is equivalent to the bottom of the recessed structure, and the cured photoresist 21 is equivalent to the side wall of the recessed structure, so that when the color resistor 3 covering the surface of the hollow aluminum film 2 is formed in the recessed structure formed by the cured photoresist 21 and the hollow aluminum film 2, the cured photoresist 21 can be used as a packaging film framework support and can mold the color resistor 3, so that the stability and the strength of the color resistor 3 are improved, and the color resistor 3 can be embedded into the recessed structure as a part of the recessed structure, so that the color resistor 3 is prevented from being peeled off; moreover, with the colored color resistance 3 embedded into the sunk structure, need not to set up the planarization layer to prior art like in the surface of fretwork aluminium membrane 2, this thickness that has just also thinned compound washing aluminium packaging film.
It can be known that, since the hollow aluminum film 2 and the cured photoresist 21 can form a recessed structure as shown in fig. 1, and the bottom of the recessed structure is actually the hollow aluminum film 2, the color resists 3 formed on the hollow aluminum film 2 can also be colorized.
Optionally, as shown in fig. 1 and fig. 2, after step S6, the method for preparing the aluminum-washed composite packaging film further includes step S8: and forming patterned cold sealing glue 6 on the surface of the surface layer film 5, so that the aluminum-washed composite packaging film has a cold sealing function by utilizing the cold sealing glue 6.
specifically, as shown in fig. 1 and 3, the step of patterning the aluminum foil layer 20 according to the set pattern to obtain the hollow aluminum film 2 specifically includes the following steps:
Step S31: forming a hollow protection layer corresponding to the set pattern on the surface of the aluminum foil layer 20; the stencil mask is typically a patterned photoresist.
For example: a photoresist layer is formed on the surface of the aluminum foil layer 20, and then the photoresist layer is subjected to photolithography by using a mask process and finally developed to form a patterned photoresist, i.e., a hollow protective layer.
step S32: dissolving the part of the aluminum foil layer 20 which is not formed with the hollow protection layer by adopting an anode dissolution method to obtain a hollow aluminum film 2, wherein the hollow protection layer covers the surface of the hollow aluminum film 2; wherein, the part of the aluminum foil layer 20 not formed with the hollowed-out protection layer becomes the aluminum foil hollowed-out area a of the hollowed-out aluminum film 2.
illustratively, the anode is the portion of the aluminum foil layer 20 where no hollowed-out protective layer is formed, the cathode is copper metal, and the electrolyte is copper sulfate.
step S33: and removing the hollow protection layer.
In order to solve the problem, as shown in fig. 1 and 3, the step of forming a cured photoresist 21 in the aluminum foil hollow area a of the hollow aluminum film 2 includes the following steps:
step S41: forming a photoresist layer 200 on the hollow aluminum film 2 and the hollow part of the hollow aluminum film 2; the method for forming the photoresist layer 200 may be a coating process or a vacuum evaporation process, and it can be understood that the thickness of the formed photoresist layer 200 should be greater than the thickness of the hollow aluminum film 2;
Step S42: carrying out ultraviolet curing on the photoresist filled in the aluminum foil hollowed-out area A of the hollowed-out aluminum film 2 by adopting a photomask process, so that a cured photoresist 21 is formed in the aluminum foil hollowed-out area A of the hollowed-out aluminum film 2; the pattern of the mask plate used in the photomask process is the same as the set pattern, so that the formed cured photoresist 21 is formed in the aluminum foil hollow area A of the hollow aluminum film 2; because the thickness of the photoresist layer 200 should be greater than the thickness of the hollow-out aluminum film 2, after the ultraviolet light is cured, the thickness of the formed cured photoresist 21 is greater than the thickness of the hollow-out aluminum film 2.
Step S43: the portions of the photoresist 200 that are not uv cured are removed.
In order to enable the aluminum-washed composite packaging film prepared by the preparation method of the aluminum-washed composite packaging film to realize the cold sealing function, after the step S43, hollowing out the aluminum foil hollow-out area A of the aluminum film 2 to form the cured photoresist 21 further comprises
Step S44: judging whether a gap exists between the cured photoresist 21 and the hollow aluminum film 2;
if the pattern is absent, the pattern of the hollowed aluminum film 2 is absent due to the anode dissolution method, and step S45 is executed;
If the pattern is not missing, the anode dissolution method does not cause the pattern missing of the hollow aluminum film 2, namely the pattern of the hollow aluminum film 2 is complete, and S5 is executed;
step S45: electroplating aluminum in a gap between the cured photoresist 21 and the hollow aluminum film 2 to ensure that the pattern of the hollow aluminum film 2 is complete; the thickness of the electroplated aluminum is the same as that of the hollowed-out aluminum film 2, so that the pattern missing part of the hollowed-out aluminum film 2 can be completely filled by the electroplated aluminum.
As can be found from the above description, in the embodiment of the present invention, after the photoresist 200 is formed in the hollow aluminum film 2 and the aluminum foil hollow area a of the hollow aluminum film 2, the photo-mask process is adopted to perform ultraviolet curing on the photoresist filled in the aluminum foil hollow area a of the hollow aluminum film 2, and the pattern of the mask plate used in the photo-mask process is defined to be the same as the set pattern, so that the formed cured photoresist 21 is located in the aluminum foil hollow area a of the hollow aluminum film 2, and the cured photoresist 21 is used to support the hollow aluminum film 2 to a certain extent, thereby improving the strength and stiffness of the hollow aluminum film 2.
In addition, when the photo-resist filled in the aluminum foil hollowed-out area a of the hollowed-out aluminum film 2 is subjected to ultraviolet light curing by using the photo-mask process, the pattern of the mask plate used in the photo-mask process is the same as the set pattern, so that the pattern of the formed cured photo-resist 21 is exactly complementary to the set pattern, therefore, if an anode dissolution method is adopted, when the aluminum material corresponding to the aluminum foil hollowed-out area a in the aluminum foil layer 20 is dissolved, a part of aluminum formed with a hollowed-out protective layer is dissolved, and after the part of the photo-resist 200 which is not subjected to ultraviolet light curing is removed in step S43, a gap exists between the cured photo-resist 21 and the hollowed-out aluminum film 2; based on this, step S43: after the photoresist without ultraviolet light curing is removed, image acquisition is carried out through image acquisition equipment, the image is identified and compared with a preset pattern, and whether a gap exists between the cured photoresist 21 and the hollow aluminum film 2 can be found out; when the gap exists, the aluminum with the same thickness as that of the hollow aluminum film 2 is formed at the gap part, and considering that a half gap is particularly small, the electroplating process is adopted, so that the position and the thickness of the formed aluminum are controllable.
Further, the thickness d of the color resists 3 can be limited3=d2-d1（d1Is hollowed out the thickness of the aluminum film 2, d2To cure the thickness of the photoresist 21), the color resists 3 are used to fill the recessed structure shown in fig. 1, that is, the color resists 3 and the cured photoresist 21 together form a similar planarization layer structure, so that the surface layer 5 can be formed flatly on the surface of the planarization structure formed by the color resists 3 and the cured photoresist 21.
In order to prevent color leakage of the color resists 3, as shown in fig. 1 and 2, a step S6 is included between the step S5 and the step S7: a color protection film 4 is formed on the surface of the photoresist cured pattern 21 and the surface of the color resists 3 such that the top film 5 indirectly covers the surface of the photoresist cured pattern 21 and the surface of the color resists 3 through the color protection film 4.
As shown in fig. 1, an embodiment of the present invention further provides an aluminum-washed composite packaging film prepared by the above preparation method, which includes a substrate film 1 and a hollow aluminum film 2 formed on a surface of the substrate film 1, a cured photoresist 21 serving as a framework of the packaging film is filled in an aluminum foil hollow area a of the hollow aluminum film 2, a color photoresist 3 covering a surface of the hollow aluminum film 2 is formed in a hollow structure formed by the cured photoresist 21 and the hollow aluminum film 2, and a surface film 5 is formed on a surface of the cured photoresist 21 and a surface of the hollow aluminum film 2.
Compared with the prior art, the beneficial effects of the aluminum-washing composite packaging film provided by the invention are the same as those of the aluminum-washing composite packaging film provided by the technical scheme, and the details are not repeated herein.
further, as shown in fig. 1, the surface film 5 indirectly covers the surface of the cured photoresist 21 and the surface of the color resistor 3 through the color protection film 4, the surface of the surface film 5 is formed with the cold sealing glue 6, and the aluminum foil hollow-out area a of the hollow aluminum film 2 is filled with the cured photoresist serving as a packaging film framework.
the aluminum washing composite packaging film provided by the embodiment of the invention is used for preparing the aluminum washing composite packaging bag, the aluminum washing composite packaging bag is subjected to a load bearing test, and the load bearing test result (visual observation) is listed in the table 1
TABLE 1 results of 500g load-bearing test of aluminum-washed composite packaging films of the examples of the present invention
As can be seen from table 1, in the embodiment of the present invention, the photoresist curing pattern is formed in the aluminum foil hollow area a of the hollow aluminum film 2, and the thickness d of the cured photoresist 21 is defined2Thickness d greater than hollow aluminum film 21And the color resistor 3 formed on the surface of the hollow aluminum film 2 is positioned in a concave structure formed by the hollow aluminum film 2 and the cured photoresist 21, so that the strength and the stiffness of the aluminum-washing composite packaging film are improved, and the aluminum-washing composite packaging film is obviously improved compared with the prior art.
in addition, the aluminum-washed composite packaging films provided in the first to third examples and the comparative example are subjected to 1000 times of bending tests, and it is visually found that the aluminum-washed composite packaging films provided in the first to third examples are basically bright in color and have no color cast phenomenon, while the aluminum-washed composite packaging films provided in the comparative example are obviously faded and have obvious color cast compared with the aluminum-washed composite packaging films before bending, which also illustrates from the side that the aluminum-washed composite packaging films provided in the embodiments of the present invention have high strength of color resistance, and are not easy to fade and have color cast problems.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The preparation method of the aluminum-washing composite packaging film is characterized by comprising the following steps:
Step S1: providing a substrate film;
step S2: vacuum evaporating an aluminum foil layer covering the substrate film on the surface of the substrate film;
Step S3: patterning the aluminum foil layer according to a set pattern to obtain a hollow aluminum film; the pattern of the hollow aluminum film corresponds to a set pattern;
Step S4: forming a cured photoresist in the aluminum foil hollow area of the hollow aluminum film; the thickness of the cured photoresist is greater than that of the hollow aluminum film;
step S5: forming a color resistor on the surface of the hollow aluminum film; the thickness d3= d 2-d 1 of the color resistor, d1 is the thickness of the hollow aluminum film, and d2 is the thickness of the cured photoresist;
Step S7: and forming a surface layer film on the surface of the color resistor and the surface of the solidified photoresist.
2. The method for preparing the aluminum-washed composite packaging film according to claim 1, wherein the substrate film and the surface film are both biaxially oriented polypropylene films or polyester films.
3. The method for preparing the aluminum-washing composite packaging film according to claim 1, wherein the step of patterning the aluminum foil layer according to a set pattern to obtain the hollowed-out aluminum film comprises the following steps:
step S31: forming a hollow protection layer corresponding to the set pattern on the surface of the aluminum foil layer;
Step S32: dissolving the part of the aluminum foil layer, which is not provided with the hollow protection layer, by adopting an anode dissolution method to obtain a hollow aluminum film, wherein the hollow protection layer covers the surface of the hollow aluminum film;
Step S33: and removing the hollowed-out protective layer.
4. The method for preparing the aluminum-washed composite packaging film according to claim 1 ~ 3, wherein the step of forming the cured photoresist in the aluminum foil hollow area of the hollow aluminum film comprises:
Step S41: forming a photoresist layer in the hollow aluminum films and the aluminum foil hollow area of the hollow aluminum films;
step S42: carrying out ultraviolet light curing on the photoresist filled in the aluminum foil hollowed-out area of the hollowed-out aluminum film by adopting a photomask process, so that a cured photoresist is formed in the aluminum foil hollowed-out area of the hollowed-out aluminum film; the patterns of the mask plate used in the photomask process are the same as the set patterns;
Step S43: and removing the photoresist which is not cured by the ultraviolet light.
5. The method for preparing an aluminum-washed composite packaging film according to claim 4, wherein after the step S43, the step of forming a cured photoresist in the aluminum foil hollow-out area of the hollow-out aluminum film further comprises:
step S44: judging whether a gap exists between the cured photoresist and the hollow aluminum film;
If so, indicating that the hollow aluminum film has pattern missing, and executing step S45;
if not, the hollowed-out aluminum film pattern is complete, and S5 is executed;
step S45: electroplating aluminum in a gap between the cured photoresist and the hollowed-out aluminum film to ensure that the pattern of the hollowed-out aluminum film is complete; the thickness of the electroplated aluminum is the same as that of the hollow aluminum film.
6. the method for preparing the aluminum-washed composite packaging film according to claim 1,
the step S6 is included between the step S5 and the step S7:
And forming a color protection film on the surface of the cured photoresist and the surface of the color resistor, so that the surface film indirectly covers the surface of the cured photoresist and the surface of the color resistor through the color protection film.
7. the method for preparing the aluminum-washed composite packaging film according to claim 1, wherein after the step S7, the method for preparing the aluminum-washed composite packaging film further comprises:
Step S8: and forming patterned cold sealing glue on the surface of the surface film.
8. the aluminum-washed composite packaging film prepared by the preparation method of any one of claims 1 to 7, which comprises a substrate film and a hollowed-out aluminum film formed on the surface of the substrate film, wherein the aluminum foil hollowed-out area of the hollowed-out aluminum film is filled with a cured photoresist serving as a packaging film framework, a color resist covering the surface of the hollowed-out aluminum film is formed in a concave structure formed by the cured photoresist and the hollowed-out aluminum film, and a surface film is formed on the surface of the cured photoresist and the surface of the hollowed-out aluminum film.
9. the aluminum-washed composite packaging film of claim 8, wherein the top film indirectly covers the surface of the cured photoresist and the surface of the color resist through a color protection film, and a cold seal is formed on the surface of the top film.
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