CN216507260U - Composite flexible packaging film - Google Patents
Composite flexible packaging film Download PDFInfo
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- CN216507260U CN216507260U CN202121293426.2U CN202121293426U CN216507260U CN 216507260 U CN216507260 U CN 216507260U CN 202121293426 U CN202121293426 U CN 202121293426U CN 216507260 U CN216507260 U CN 216507260U
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Abstract
The utility model discloses a composite flexible packaging film, which comprises a composite adhesive film positioned at the lower layer and a digital printing film positioned at the upper layer, wherein a hot adhesive layer is arranged between the composite adhesive film and the digital printing film, and the composite adhesive film and the digital printing film are combined into a whole through the hot adhesive layer; the composite heat pasting film sequentially comprises a basal layer, a composite adhesive layer and an aluminum film layer from bottom to top; the digital printing film sequentially comprises a bottom coating, an ink layer and a film coating layer from bottom to top. The utility model effectively ensures the stability of the image after digital printing and the composite firmness of the flexible packaging film, avoids the problem of peeling and layering of the finished film and shortens the production time of processing enterprises.
Description
Technical Field
The utility model relates to a soft package film for food or cosmetics, in particular to a composite soft package hot-sticking film, belonging to the technical field of film composite processing.
Background
The soft packing film is one kind of common packing material for food and cosmetics and is produced with several kinds of film material of different material and through dry compounding, solvent-free compounding and other technological process. In order to achieve better display effect and highlight the characteristics of products, the part of the flexible packaging film also uses a gravure printing process for the outermost film material of the flexible packaging film, so that the final package shows a three-dimensional effect.
And in the specific processing process, the unused patterns need to be respectively carved with 4-7 printing screen plates according to the color register patterns, and then the printing screen plates are utilized to perform subsequent printing operation. It is expected that such a conventional processing method has advantages of stability and high efficiency in a large-scale production scenario, but once the packaging pattern needs to be adjusted or changed, a processing enterprise needs to manufacture the corresponding printing screen again, thereby increasing the production cost and prolonging the delivery time.
At present, digital printing equipment capable of directly printing on the film is also continuously available in the market, and the equipment can directly print patterns on the flexible packaging film, so that the manufacturing link of a printing screen plate in the traditional processing mode is omitted, and the printing efficiency is improved. However, another problem that is troublesome to the processing enterprises is that the bonding strength between the electronic ink for digital printing and the film material is low.
In contrast, some film manufacturers propose new film materials to improve the bonding strength between the electronic ink and the film material, but most of the new film materials are easily inconsistent in the bonding force between films and cause the problems of peeling and delamination of the film finished product and the like when the new film materials are bonded with the traditional film materials due to the particularity of the materials. If the bonding force between the film layers is improved and the composite firmness of the flexible packaging film is stabilized, the glue used in the composite process needs to be cured, so that the process is not environment-friendly, and the additional time of several days is needed.
In view of the above, how to provide a novel composite flexible package heat-sealing film for food or cosmetics in order to solve the above technical problems is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a composite flexible packaging film, which is described in detail below.
A composite flexible packaging film comprises a composite adhesive film positioned at a lower layer and a digital printing film positioned at an upper layer, wherein a hot adhesive layer is arranged between the composite adhesive film and the digital printing film, and the composite adhesive film and the digital printing film are combined into a whole through the hot adhesive layer;
the composite adhesive film sequentially comprises a substrate layer, a composite adhesive layer and an aluminum film layer from bottom to top;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film coating layer from bottom to top.
Preferably, in the composite film, the substrate layer is linear low-density polyethylene, the composite adhesive layer is waterborne polyurethane or polyacrylate, and the aluminum film layer is aluminum-plated polyethylene terephthalate.
Preferably, in a combined state of the composite adhesive film and the digital printing film, the hot adhesive layer is adhered to the upper part of the aluminum film layer; the hot-melt adhesive layer is hot-melt resin, and the hot-melt resin comprises any one of polyethylene, ethylene-vinyl acetate copolymer, ethylene acrylic acid copolymer or polyethylene oxide.
Preferably, in the digital printing film, the primer layer is a layer of water-based primer coated on the thermal adhesive layer, the water-based primer comprises one of modified polyurethane, polyacrylate or polyimide, the ink layer is a layer of digital printing ink coated on the primer layer, and the film coating layer is polyethylene terephthalate or biaxially oriented polypropylene.
Preferably, the composite flexible packaging film sequentially comprises a composite adhesive film and a digital printing film from bottom to top, and the composite adhesive film and the digital printing film are combined into a whole through a hot adhesive layer;
the composite film sequentially comprises a substrate layer, a composite adhesive layer and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layer is waterborne polyurethane, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is biaxially-oriented polypropylene.
Preferably, the composite flexible packaging film sequentially comprises a composite adhesive film and a digital printing film from bottom to top, and the composite adhesive film and the digital printing film are combined into a whole through a hot adhesive layer;
the composite adhesive film sequentially comprises a substrate layer, two composite adhesive layers and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layers are waterborne polyurethane, a layer of aluminum foil is arranged between the two composite adhesive layers, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is polyethylene glycol terephthalate.
Compared with the prior art, the utility model has the advantages that:
the composite flexible packaging film provided by the utility model effectively solves the problems of difficult absorption and adhesion of electronic ink on a film material, and ensures the stability of images after digital printing. Meanwhile, the utility model also reasonably utilizes the hot melt adhesive, so that the binding force between the film layers is improved and the consistency is ensured, thereby not only effectively ensuring the composite firmness of the flexible packaging film and avoiding the problem of peeling and layering of the finished film, but also avoiding the curing link in the traditional process, ensuring the processing process to be more environment-friendly and shortening the production time of processing enterprises.
Moreover, the film layer structure of the utility model is simple and intuitive, and the film materials used by the film layers are mostly common and easily available products in the market, so that the overall manufacturing cost of the flexible packaging film is greatly reduced, and the utility model is very suitable for large-scale popularization and application of enterprises.
In addition, the film structure can be optimized and adjusted according to different characteristics of products to be packaged, the structure is high in flexibility and adaptability, reference basis is provided for other product schemes related to flexible packaging films in the same field, expansion and extension can be conducted according to the reference basis, and the idea of the utility model is applied to related technical schemes, so that the film structure has high reference significance.
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of facilitating understanding and understanding of the technical solutions of the present invention.
Drawings
FIG. 1 is a schematic diagram showing a hierarchical structure of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the hierarchical structure of embodiment 2 of the present invention.
Detailed Description
The utility model provides a composite flexible package hot-sticking film for food or cosmetics, and the specific scheme is as follows.
A composite flexible packaging film comprises a composite adhesive film positioned on a lower layer and a digital printing film positioned on an upper layer, and the specific film thickness and the refined hierarchical structure can be adjusted according to the actual use requirement.
The composite film sequentially comprises a basal layer, a composite adhesive layer and an aluminum film layer from bottom to top. In terms of material selection, the substrate layer is Linear Low Density Polyethylene (LLDPE), the composite adhesive layer is waterborne polyurethane or polyacrylate, and the aluminum film layer is aluminum-plated polyethylene terephthalate (aluminum-plated PET).
Through the use of the composite glue layer, the bonding strength of the film layer can reach the level of 1.5N/15 mm-3.0N/15 mm, so that the peeling and delamination of the film finished product are avoided.
The digital printing film sequentially comprises a bottom coating, an ink layer and a film coating layer from bottom to top. In terms of material selection, the base coat is a layer of water-based base coat coated on the hot-adhesive layer, the water-based base coat comprises one of modified polyurethane, polyacrylate or polyimide, the ink layer is a layer of digital printing ink coated on the base coat, and the film coating layer is polyethylene terephthalate (PET) or biaxially oriented polypropylene (BOPP).
The water-based primer used here is amphiphilic, i.e., soluble in both water and oil, has good dispersibility, has good physical properties of an oleoresin, and can be molecularly bonded to the resin in the ink particles.
A hot-paste adhesive layer is arranged between the composite adhesive film and the digital printing film, and the composite adhesive film and the digital printing film are combined into a whole through the hot-paste adhesive layer. In the combined state of the composite adhesive film and the digital printing film, the hot adhesive layer is adhered to the upper part of the aluminum film layer; the hot-melt adhesive layer is a hot-melt resin with a melting point of 80-105 ℃, and the hot-melt resin comprises any one of Polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), ethylene acrylic acid copolymer (EAA) or polyethylene oxide (PEO).
Because the hot-melt resin is used in the hot-adhesive layer, the solid content is 100 percent, the hot-melt resin does not show viscosity at normal temperature, the hot-melt resin can be melted only by heating at a certain temperature, VOC is not generated, bag making processing can be directly carried out after coating, curing is not needed, and the process flow can be shortened to the maximum extent.
The above scheme is additionally illustrated below with reference to two specific examples:
example 1
As shown in fig. 1, a composite flexible packaging film for food packaging sequentially comprises a composite adhesive film and a digital printing film from bottom to top, wherein the composite adhesive film and the digital printing film are combined into a whole through a hot adhesive layer;
the composite film sequentially comprises a substrate layer, a composite adhesive layer and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layer is waterborne polyurethane, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is a biaxially oriented polypropylene film.
Example 2
As shown in fig. 2, a composite flexible packaging film for facial mask packaging (high barrier property requirement and high heat seal strength) comprises a composite adhesive film and a digital printing film from bottom to top, wherein the composite adhesive film and the digital printing film are combined into a whole through a heat adhesive layer;
the composite adhesive film sequentially comprises a substrate layer, two composite adhesive layers and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layers are waterborne polyurethane, a layer of aluminum foil is arranged between the two composite adhesive layers, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is a polyethylene glycol terephthalate film.
In conclusion, the composite flexible packaging film provided by the utility model effectively solves the problems that electronic ink is difficult to absorb and adhere on a film material, and ensures the stability of images after digital printing. Meanwhile, the utility model also reasonably utilizes the hot melt adhesive, so that the binding force between the film layers is improved and the consistency is ensured, thereby not only effectively ensuring the composite firmness of the flexible packaging film and avoiding the problem of peeling and layering of the finished film, but also avoiding the curing link in the traditional process, ensuring the processing process to be more environment-friendly and shortening the production time of processing enterprises.
Moreover, the film layer structure of the utility model is simple and intuitive, and the film materials used by the film layers are mostly common and easily available products in the market, so that the overall manufacturing cost of the flexible packaging film is greatly reduced, and the utility model is very suitable for large-scale popularization and application of enterprises.
In addition, the film structure can be optimized and adjusted according to different characteristics of products to be packaged, the structure is high in flexibility and adaptability, reference basis is provided for other product schemes related to flexible packaging films in the same field, expansion and extension can be conducted according to the reference basis, and the idea of the utility model is applied to related technical schemes, so that the film structure has high reference significance.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Finally, it should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should integrate the description, and the technical solutions in the embodiments can be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (6)
1. A composite flexible packaging film is characterized by comprising a composite adhesive film positioned at a lower layer and a digital printing film positioned at an upper layer, wherein a hot adhesive layer is arranged between the composite adhesive film and the digital printing film, and the composite adhesive film and the digital printing film are combined into a whole through the hot adhesive layer;
the composite adhesive film sequentially comprises a substrate layer, a composite adhesive layer and an aluminum film layer from bottom to top;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film coating layer from bottom to top.
2. A composite flexible packaging film according to claim 1, wherein: in the composite film, the substrate layer is linear low-density polyethylene, the composite adhesive layer is waterborne polyurethane or polyacrylate, and the aluminum film layer is aluminized polyethylene terephthalate.
3. A composite flexible packaging film according to claim 1, wherein: in the combined state of the composite adhesive film and the digital printing film, the hot adhesive layer is adhered to the upper part of the aluminum film layer; the hot-melt adhesive layer is hot-melt resin, and the hot-melt resin comprises any one of polyethylene, ethylene-vinyl acetate copolymer, ethylene acrylic acid copolymer or polyethylene oxide.
4. A composite flexible packaging film according to claim 1, wherein: in the digital printing film, the base coat is a layer of water-based base coat agent coated on the hot-sticking adhesive layer, the water-based base coat agent comprises one of modified polyurethane, polyacrylate or polyimide, the ink layer is a layer of digital printing ink coated on the base coat, and the laminating layer is polyethylene terephthalate or biaxially oriented polypropylene.
5. The composite flexible packaging film is characterized by sequentially comprising a composite adhesive film and a digital printing film from bottom to top, wherein the composite adhesive film and the digital printing film are combined into a whole through a hot adhesive layer;
the composite film sequentially comprises a substrate layer, a composite adhesive layer and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layer is waterborne polyurethane, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is biaxially-oriented polypropylene.
6. The composite flexible packaging film is characterized by sequentially comprising a composite adhesive film and a digital printing film from bottom to top, wherein the composite adhesive film and the digital printing film are combined into a whole through a hot adhesive layer;
the composite adhesive film sequentially comprises a substrate layer, two composite adhesive layers and an aluminum film layer from bottom to top, wherein the substrate layer is a linear low-density polyethylene film, the composite adhesive layers are waterborne polyurethane, a layer of aluminum foil is arranged between the two composite adhesive layers, and the aluminum film layer is aluminized polyethylene terephthalate;
the hot-sticking adhesive layer is a polyethylene and ethylene acrylic acid copolymer;
the digital printing film sequentially comprises a bottom coating, an ink layer and a film covering layer from bottom to top, wherein the bottom coating is made of modified polyurethane, the ink layer is digital printing ink, and the film covering layer is polyethylene glycol terephthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121293426.2U CN216507260U (en) | 2021-06-10 | 2021-06-10 | Composite flexible packaging film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121293426.2U CN216507260U (en) | 2021-06-10 | 2021-06-10 | Composite flexible packaging film |
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| Publication Number | Publication Date |
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| CN216507260U true CN216507260U (en) | 2022-05-13 |
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|---|---|---|---|
| CN202121293426.2U Active CN216507260U (en) | 2021-06-10 | 2021-06-10 | Composite flexible packaging film |
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| CN (1) | CN216507260U (en) |
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- 2021-06-10 CN CN202121293426.2U patent/CN216507260U/en active Active
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