High-covering dyeing-resistant film and packaging bag

Abstract

The utility model discloses a high-covering dyeing-resistant film and a packaging bag. The high-covering dyeing-resistant film comprises a surface printing layer, a covering layer, a blocking layer and a bottom heat-sealing layer which are sequentially arranged from top to bottom, the printing layer is a biaxially oriented polypropylene film, and patterns are printed on the surface layer of the biaxially oriented polypropylene film; the covering layer is a milk-white polypropylene film, the blocking layer is a biaxially oriented polypropylene film coated with a blocking material, and the heat sealing layer is a casting polypropylene film. When the packaging bag made of the high-covering anti-staining film is used for containing sauce, the covering layer of the polypropylene film is arranged at the position close to the surface printing layer, so that the sauce can reach the bottom heat-sealing layer firstly and then reach the barrier layer with certain barrier property when being migrated, further migration of the sauce can be effectively blocked, and the sauce can be prevented from being damaged. The remaining small part of the sauce migrated to the covering layer can be covered by the milky polypropylene film, and then the printing ink is printed on the printing layer, so that the covering degree of the whole product is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging bags, and in particular to a high-coverage anti-dyeing film and packaging bag. Background Technology

[0002] Food packaging bags are designed to protect food from biological, chemical, and physical damage during the journey from the factory to the consumer. They need to maintain the food's consistent quality while also possessing an attractive appearance to appeal to consumers. However, existing packaging bags are ineffective at concealing dark-colored sauces, which remain visible through the film, negatively impacting the printing quality and overall aesthetics of the packaging. Utility Model Content

[0003] The purpose of this utility model is to provide a high-coverage anti-staining film and packaging bag, which has the advantage of fully covering dark sauces and preventing them from affecting the appearance of the packaging bag.

[0004] To achieve the above objectives, the solution of this utility model is:

[0005] A high-opacity anti-dyeing film includes, from top to bottom, a surface printing layer, a masking layer, a barrier layer, and a bottom heat-sealing layer; the printing layer is a biaxially oriented polypropylene film with a pattern printed on its surface; the masking layer is a milky-white polypropylene film; the barrier layer is a biaxially oriented polypropylene film coated with a barrier material, wherein the barrier material is alumina or silica; and the heat-sealing layer is a cast polypropylene film.

[0006] Furthermore, the thickness of the printed layer is 18-28 μm.

[0007] Furthermore, the thickness of the covering layer is 30-50 μm.

[0008] Furthermore, the thickness of the barrier layer is 18-28 μm.

[0009] Furthermore, the thickness of the heat-sealing layer is 60-100 μm.

[0010] After adopting the above technical solution, when packaging bags made with this high-opacity anti-dyeing film are used to hold dark-colored sauces, the oval polypropylene film (CPP) covering layer is placed near the surface printing layer. When the sauce migrates, it first reaches the bottom heat-sealing layer, and then the barrier layer. The barrier layer is coated with a barrier material that has a certain barrier property, which can block oxygen and water vapor, effectively preventing further migration of the sauce. The remaining small portion of sauce that migrates to the covering layer will also be covered by the oval polypropylene film. Then, ink is printed on the printing layer, further improving the overall opacity of the product. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the layer structure of the high-coverage anti-dyeing film according to an embodiment of the present invention.

[0012] Labeling explanation: Printing layer 1, Covering layer 2, Barrier layer 3, Underlying heat-sealing layer 4. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] like Figure 1 As shown, a high-opacity anti-dyeing film of this embodiment includes a surface printing layer 1, a cover layer 2, a barrier layer 3, and a bottom heat-sealing layer 4 arranged sequentially from top to bottom; the printing layer 1 is a biaxially oriented polypropylene film with a pattern printed on its surface; the cover layer 2 is a milky white polypropylene film; the barrier layer 3 is a biaxially oriented polypropylene film coated with a barrier material, which can be alumina or silicon dioxide; and the heat-sealing layer is a cast polypropylene film.

[0015] Therefore, when packaging bags made with this high-coverage anti-dyeing film contain dark-colored sauces, the milky white polypropylene film (CPP) covering layer 2 is positioned near the surface printing layer 1. When the sauce migrates, it first reaches the bottom heat-sealing layer 4, and then the barrier layer 3. The barrier layer 3 is coated with barrier materials such as alumina or silicon dioxide, which has a certain barrier property and can block oxygen and water vapor, effectively preventing further migration of the sauce. The remaining small portion of sauce that migrates to the covering layer 2 is also covered by the milky white polypropylene film. Then, ink is printed on the printing layer 1, further improving the overall coverage of the product.

[0016] The covering layer 2 is milky white and can be prepared by adding a milky white masterbatch to a polypropylene film.

[0017] In this embodiment, the thickness of the printed layer can be 18-28 μm. The thickness of the masking layer can be 30-50 μm. The thickness of the barrier layer can be 18-28 μm. The thickness of the heat-sealing layer can be 60-100 μm.

[0018] In summary, the high-octane dyeing film of this embodiment can be mainly applied to sauce packaging bags to prevent dark sauce from seeping through, and can have a good appearance and achieve a good visual expression effect.

[0019] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0020] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.

Claims

1. A high-opacity anti-dyeing film, characterized in that: It includes, from top to bottom, a surface printing layer, a masking layer, a barrier layer, and a bottom heat-sealing layer; the printing layer is a biaxially oriented polypropylene film with a pattern printed on its surface; the masking layer is a milky white polypropylene film; the barrier layer is a biaxially oriented polypropylene film coated with a barrier material, which is alumina or silicon dioxide; and the heat-sealing layer is a cast polypropylene film.

2. The high-opacity anti-dyeing film according to claim 1, characterized in that: The thickness of the printed layer is 18-28 μm.

3. The high-opacity anti-dyeing film according to claim 1, characterized in that: The thickness of the covering layer is 30-50 μm.

4. The high-opacity anti-dyeing film according to claim 1, characterized in that: The thickness of the barrier layer is 18-28 μm.

5. The high-opacity anti-dyeing film according to claim 1, characterized in that: The thickness of the heat-sealing layer is 60-100 μm.

6. A packaging bag, characterized in that: It is made using the high-coverage anti-dyeing film as described in any one of claims 1-5.

Images