Composite packaging film for blocking transparent powder and packaging bag

Abstract

The utility model discloses a barrier transparent powder composite packaging film and a packaging bag, the barrier transparent powder composite packaging film comprises a printing PET film layer, a nylon film layer, a basic PET film layer, a corona PE film layer, an anti-powder-absorption PE film core layer and an anti-powder-absorption PE film heat sealing layer, the anti-powder-absorption PE film heat sealing layer and the corona PE film layer are respectively arranged on two sides of the anti-powder-absorption PE film core layer; the nylon film layer and the corona PE film layer are arranged on the two sides of the basic PET film layer respectively, and the printing PET film layer and the basic PET film layer are arranged on the two sides of the nylon film layer respectively. The utility model further discloses a packaging bag prepared from the composite packaging film.

Description

Technical Field

[0001] The utility model relates to the field of packaging materials, in particular to a barrier transparent powder composite packaging film and a packaging bag. Background Art

[0002] Currently, many items are packaged using packaging films (and packaging bags made from packaging films). The structure of the commonly used packaging films is shown in patent publication CN213006989U. The innermost side of the packaging film of this structure is a layer of PE film (i.e., a heat-sealing layer). This packaging film has a problem when packaging some contents containing powders. That is, the heat-sealing layer of the packaging film of this structure is prone to adsorb powders due to static electricity. Once powders are adsorbed on the heat-sealing layer, powders will stick between the heat-sealing layers during heat sealing. Once powders stick, the heat-sealing strength will be reduced. In severe cases, it may cause bag leakage in the finished product stage. Utility Model Content

[0003] In response to the above-mentioned problems, the utility model proposes a barrier transparent powder composite packaging film and packaging bag. When the composite packaging film is heat-sealed, no powder will remain between the anti-powder absorption PE film heat-sealing layer and the anti-powder absorption PE film heat-sealing layer, which can ensure the heat sealing strength between the anti-powder absorption PE film heat-sealing layer and the anti-powder absorption PE film heat-sealing layer, and reduce the probability of bag leakage in the finished product stage.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] A barrier transparent powder composite packaging film comprises a printed PET film layer, a nylon film layer, a base PET film layer, a corona PE film layer, an anti-powder absorption PE film core layer, and an anti-powder absorption PE film heat-sealing layer, wherein the anti-powder absorption PE film heat-sealing layer and the corona PE film layer are respectively arranged on both sides of the anti-powder absorption PE film core layer, the nylon film layer and the corona PE film layer are respectively arranged on both sides of the base PET film layer, and the printed PET film layer and the base PET film layer are respectively arranged on both sides of the nylon film layer.

[0006] When preparing packaging bags with this composite packaging film, the anti-powder absorption PE film heat-sealing layer is used for heat sealing. Since the anti-powder absorption PE heat-sealing film layer will not stick to powder during use, no powder will remain between the anti-powder absorption PE film heat-sealing layers during heat sealing. This ensures the heat sealing strength between the anti-powder absorption PE film heat-sealing layers and reduces the probability of bag leakage in the finished product stage.

[0007] Specifically, in this composite packaging film, the preparation method of the anti-powder absorption PE film core layer and the anti-powder absorption PE film heat sealing layer is to add a certain amount of antistatic agent (the specific antistatic agent can be polyethylene glycol) to the PE resin material when extruding it into a film. After adding the antistatic agent, the powder will not adhere to the anti-powder absorption PE film heat sealing layer due to the electrostatic effect, ensuring that the entire composite film is not easily adsorbed and bonded by the powder during use.

[0008] Specifically, in this composite packaging film, the printed PET film layer is used for printing. At the same time, the printed PET film layer, the nylon film layer and the basic PET film layer are composited together to act as the skeleton of the entire composite film, ensuring that the entire composite film has good stiffness and barrier properties.

[0009] At the same time, this composite film is made of PET film, nylon film and PE film, so the whole composite film is transparent.

[0010] When heat sealing, no powder will remain between the anti-powder absorption PE film heat sealing layer and the anti-powder absorption PE film heat sealing layer, which can ensure the heat sealing strength between the anti-powder absorption PE film heat sealing layer and the anti-powder absorption PE film heat sealing layer, and reduce the probability of bag leakage in the finished product stage.

[0011] Optionally, it further includes a matte oil layer and an ink layer, wherein the matte oil layer and the ink layer are respectively arranged on both sides of the printed PET film layer, and the ink layer is located between the printed PET film layer and the nylon film layer.

[0012] The specific function of the matte oil layer is to reduce the light reflection on the surface and improve the printing effect of the entire packaging film.

[0013] The ink layer is formed after the ink is printed on the printed PET film layer. The ink layer will reduce the light transmittance of the entire film to a certain extent, but it will not completely block light like aluminum foil. Polyurethane ink can be used as the ink.

[0014] Specifically, the thickness of the matte oil layer is 0.5 μm, and the thickness of the ink layer is 2 μm.

[0015] Optionally, a first polyurethane adhesive layer is provided between the ink layer and the nylon membrane layer.

[0016] Optionally, a second polyurethane adhesive layer is provided between the nylon film layer and the base PET film layer.

[0017] Optionally, a third polyurethane adhesive layer is provided between the base PET film layer and the corona PE film layer.

[0018] Optionally, the thickness of the printed PET film layer is 12 μm.

[0019] Optionally, the thickness of the nylon membrane layer is 15um.

[0020] Optionally, the thickness of the base PET film layer is 12 μm.

[0021] Specifically, the thickness of the first, second, and third polyurethane adhesive layers is 3.5 μm. They all utilize two-component polyurethane. The corona-resistant PE film layer is 18 μm thick, the anti-powder absorption PE film core layer is 24 μm thick, and the anti-powder absorption PE film heat seal layer is 18 μm thick.

[0022] A packaging bag comprises the barrier transparent powder composite packaging film described above.

[0023] This packaging bag is made of the composite packaging film shown above. During the preparation, the anti-powder absorption PE film heat-sealing layers of two composite packaging films are matched together by thermal bonding.

[0024] The beneficial effect of the utility model is that no powder will remain between the anti-powder absorption PE film heat sealing layer and the anti-powder absorption PE film heat sealing layer during heat sealing, which can ensure the heat sealing strength between the anti-powder absorption PE film heat sealing layer and the anti-powder absorption PE film heat sealing layer, and reduce the probability of bag leakage in the finished product stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the structure of a barrier transparent powder composite packaging film.

[0027] The reference numerals in the figure are: 1. matt oil layer; 2. printed PET film layer; 3. ink layer; 4. first adhesive layer; 5. nylon layer; 6. second adhesive layer; 7. base PET film layer; 8. third adhesive layer; 901. corona PE film layer; 902. anti-powder absorption PE film core layer; 903. anti-powder absorption PE film heat sealing layer. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0031] Example 1

[0032] As attached Figure 1 As shown, a barrier transparent powder composite packaging film includes a printed PET film layer 2, a nylon film layer, a base PET film layer 7, a corona PE film layer 901, an anti-powder absorption PE film core layer 902, and an anti-powder absorption PE film heat sealing layer 903. The anti-powder absorption PE film heat sealing layer 903 and the corona PE film layer 901 are respectively arranged on both sides of the anti-powder absorption PE film core layer 902, the nylon film layer and the corona PE film layer 901 are respectively arranged on both sides of the base PET film layer 7, and the printed PET film layer 2 and the base PET film layer 7 are respectively arranged on both sides of the nylon film layer.

[0033] When preparing packaging bags with this composite packaging film, the anti-powder absorption PE film heat-sealing layer 903 is used for heat sealing. Since the anti-powder absorption PE heat-sealing film layer will not stick to powder during use, no powder will remain between the anti-powder absorption PE film heat-sealing layer 903 and the anti-powder absorption PE film heat-sealing layer 903 during heat sealing. This ensures the heat sealing strength between the anti-powder absorption PE film heat-sealing layer 903 and the anti-powder absorption PE film heat-sealing layer 903, and reduces the probability of bag leakage in the finished product stage.

[0034] Specifically, in this type of composite packaging film, the preparation method of the anti-powder absorption PE film core layer 902 and the anti-powder absorption PE film heat sealing layer 903 is to add a certain amount of antistatic agent (the specific antistatic agent can be polyethylene glycol) to the PE resin material when extruding it into a film. After adding the antistatic agent, the powder will not adhere to the anti-powder absorption PE film heat sealing layer 903 due to the electrostatic effect, ensuring that the entire composite film is not easily adsorbed and adhered by the powder during use.

[0035] Specifically in this composite packaging film, the printed PET film layer 2 is used for printing. At the same time, the printed PET film layer 2, the nylon film layer and the base PET film layer 7 are combined together to act as the skeleton of the entire composite film, ensuring that the entire composite film has good stiffness and barrier properties.

[0036] At the same time, this composite film is made of PET film, nylon film and PE film, so the whole composite film is transparent.

[0037] During heat sealing, no powder will remain between the anti-powder absorption PE film heat sealing layer 903 and the anti-powder absorption PE film heat sealing layer 903, which can ensure the heat sealing strength between the anti-powder absorption PE film heat sealing layer 903 and the anti-powder absorption PE film heat sealing layer 903 and reduce the probability of bag leakage in the finished product stage.

[0038] As attached Figure 1 As shown, it also includes a matte oil layer 1 and an ink layer 3. The matte oil layer 1 and the ink layer 3 are respectively arranged on both sides of the printed PET film layer 2, and the ink layer 3 is located between the printed PET film layer 2 and the nylon film layer.

[0039] The specific function of the matte oil layer 1 is to reduce the light reflection on the surface and improve the printing effect of the entire packaging film.

[0040] The ink layer 3 is formed after the ink is printed on the printed PET film layer 2. The ink layer 3 will reduce the light transmittance of the entire film to a certain extent, but it will not completely block light like aluminum foil. The ink can be polyurethane ink.

[0041] Specifically, the thickness of the matte oil layer 1 is 0.5 μm, and the thickness of the ink layer 3 is 2 μm.

[0042] As attached Figure 1 As shown, a first polyurethane adhesive layer is provided between the ink layer 3 and the nylon film layer.

[0043] As attached Figure 1 As shown, a second polyurethane adhesive layer is provided between the nylon film layer and the base PET film layer 7 .

[0044] As attached Figure 1 As shown, a third polyurethane adhesive layer is provided between the base PET film layer 7 and the corona PE film layer 901 .

[0045] As attached Figure 1 As shown, the thickness of the printed PET film layer 2 is 12 μm.

[0046] As attached Figure 1 As shown, the thickness of the nylon membrane layer is 15 μm.

[0047] As attached Figure 1 As shown, the thickness of the base PET film layer 7 is 12 μm.

[0048] Specifically, the thickness of the first, second, and third polyurethane adhesive layers is 3.5 μm. Each of the first, second, and third polyurethane adhesive layers utilizes a two-component polyurethane. The thickness of the corona-resistant PE film layer 901 is 18 μm, the thickness of the anti-powder absorption PE film core layer 902 is 24 μm, and the thickness of the anti-powder absorption PE film heat seal layer 903 is 18 μm.

[0049] Example 2

[0050] A packaging bag is prepared using the composite packaging film shown in Example 1. During the preparation, the anti-powder absorption PE film heat-sealing layers of two composite packaging films are matched together by thermal bonding.

[0051] The above-described embodiments only express some embodiments of the present invention. The description is relatively specific and detailed, but it should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, it is still possible to modify the technical solutions described in the above-mentioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model should be included in the scope of protection of this utility model.

Claims

1. A barrier transparent powder composite packaging film, characterized in that: It includes a printed PET film layer, a nylon film layer, a basic PET film layer, a corona PE film layer, an anti-powder absorption PE film core layer, and an anti-powder absorption PE film heat sealing layer. The anti-powder absorption PE film heat sealing layer and the corona PE film layer are respectively arranged on both sides of the anti-powder absorption PE film core layer, the nylon film layer and the corona PE film layer are respectively arranged on both sides of the basic PET film layer, and the printed PET film layer and the basic PET film layer are respectively arranged on both sides of the nylon film layer.

2. The barrier transparent powder composite packaging film according to claim 1, characterized in that: It also includes a matting oil layer and an ink layer, which are respectively arranged on both sides of the printed PET film layer, and the ink layer is located between the printed PET film layer and the nylon film layer.

3. The barrier transparent powder composite packaging film according to claim 2, characterized in that: A first polyurethane adhesive layer is provided between the ink layer and the nylon film layer.

4. The barrier transparent powder composite packaging film according to claim 1, characterized in that: A second polyurethane adhesive layer is provided between the nylon film layer and the base PET film layer.

5. The barrier transparent powder composite packaging film according to claim 1, characterized in that: A third polyurethane adhesive layer is provided between the base PET film layer and the corona PE film layer.

6. The barrier transparent powder composite packaging film according to claim 1, characterized in that: The thickness of the printed PET film layer is 12 μm.

7. The barrier transparent powder composite packaging film according to claim 1, characterized in that: The thickness of the nylon membrane layer is 15 μm.

8. The barrier transparent powder composite packaging film according to claim 1, characterized in that: The thickness of the base PET film layer is 12 μm.

9. A packaging bag, characterized in that: The invention comprises the barrier transparent powder composite packaging film according to any one of claims 1 to 8.

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