Recyclable packaging film

Abstract

The utility model relates to the technical field of packaging films, in particular to a recoverable packaging film. Comprising an outer protection layer and an inner protection layer, a middle filling layer is arranged between the outer protection layer and the inner protection layer, and the outer protection layer comprises an outer printing layer, an outer side oxygen isolation layer and an outer side blocking layer from the outer layer to the inner layer in sequence; the middle filling layer comprises an outer moisture-proof barrier layer, an inner moisture-proof barrier layer and a middle supporting layer located between the outer moisture-proof barrier layer and the inner moisture-proof barrier layer, and the inner protection layer comprises a heat sealing layer and an inner side blocking layer. The recoverable packaging film provided by the utility model has the advantages of heat resistance, good product barrier property and good tensile tear resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to a recyclable packaging film. Background Art

[0002] Packaging film mainly refers to the film used for packaging articles. It is a material widely used in various packaging fields. It has the advantages of being light, flexible, moisture-proof, anti-oxidation, and fresh-keeping. It is widely used in food, medicine, cosmetics, electronics and other industries.

[0003] The use of packaging films is very wide, and existing packaging films have many defects in use:

[0004] The existing packaging film is made of a single material with relatively simple performance, resulting in many defects during use, and poor heat resistance and product barrier properties. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a recyclable packaging film which is heat-resistant, has good product barrier properties and good tensile and tear resistance.

[0006] The technical solution adopted by the utility model is: a recyclable packaging film, including an outer protective layer and an inner protective layer, an intermediate filling layer is arranged between the outer protective layer and the inner protective layer, the outer protective layer includes, from the outer layer to the inner layer, an outer printing layer, an outer oxygen-isolating layer, and an outer barrier layer, the intermediate filling layer includes an outer moisture-isolating barrier layer, an inner moisture-isolating barrier layer, and an intermediate supporting layer located between the outer moisture-isolating barrier layer and the inner moisture-isolating barrier layer, and the inner protective layer includes a heat-sealing layer and an inner barrier layer.

[0007] As a further solution of the utility model: the material of the outer printed layer is polyethylene terephthalate, the material of the outer oxygen insulation layer is polypropylene, the material of the outer barrier layer is nylon, and the outer printed layer and the outer oxygen insulation layer, as well as the outer oxygen insulation layer and the outer barrier layer are connected by an adhesive.

[0008] As a further solution of the utility model: the material of the middle support layer is polyamide, and the middle support layer and the outer barrier layer are bonded by an outer moisture barrier layer.

[0009] As a further solution of the utility model: the materials of the outer moisture barrier layer and the inner moisture barrier layer are both linear low-density polyethylene, and the thicknesses of the outer moisture barrier layer and the inner moisture barrier layer are the same.

[0010] As a further solution of the utility model: the material of the heat-sealing layer is ethylene-acrylic acid copolymer, and the inner moisture-proof barrier layer and the inner barrier layer are bonded by the heat-sealing layer.

[0011] As a further solution of the utility model: the material of the inner barrier layer is a modified PVA coating liquid, and the coating thickness of the modified PVA coating liquid is 0.65-0.75g / m2.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The material of the outer barrier layer is nylon, which has strong wear resistance, is easy to process, and has good gas and water vapor barrier properties; the outer moisture barrier layer and the inner moisture barrier layer are made of linear low-density polyethylene, which makes the packaging film have higher tensile strength and better puncture and tear resistance, and the tensile strength and elastic modulus of the middle support layer are relatively high, which can be adapted to the tear resistance of the outer moisture barrier layer and the inner moisture barrier layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the overall layered state of a recyclable packaging film of the utility model.

[0016] Figure 2 The utility model is an overall exploded schematic diagram of a recyclable packaging film.

[0017] Figure 3 The utility model is a structural schematic diagram of a recyclable packaging film in a rolled-up state.

[0018] Attached photos

[0019] 1. Outer protective layer; 1.1. Outer printing layer; 1.2. Outer oxygen barrier layer; 1.3. Outer barrier layer; 2. Middle filling layer; 2.1. Outer moisture barrier layer; 2.2. Middle support layer; 2.3. Inner moisture barrier layer; 3. Inner protective layer; 3.1. Heat sealing layer; 3.2. Inner barrier layer. Implementation

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] In order to achieve heat resistance, good product barrier properties and good tensile tear resistance, the utility model provides a recyclable packaging film as shown in the figure, including an outer protective layer 1 and an inner protective layer 3, with an intermediate filling layer 2 provided between the outer protective layer 1 and the inner protective layer 3.

[0023] The outer protective layer 1 in the utility model comprises, from the outer layer to the inner layer, an outer printed layer 1.1, an outer oxygen-insulating layer 1.2, and an outer barrier layer 1.3. The material of the outer printed layer 1.1 is polyethylene terephthalate, the material of the outer oxygen-insulating layer 1.2 is polypropylene, and the material of the outer barrier layer 1.3 is nylon. The outer printed layer 1.1 and the outer oxygen-insulating layer 1.2, and the outer oxygen-insulating layer 1.2 and the outer barrier layer 1.3 are connected by adhesives. The outer printed layer 1.1 uses polyethylene terephthalate to make the packaging film have excellent electrical insulation, friction resistance, and good dimensional stability. The material of the outer barrier layer 1.3 is nylon, which has strong wear resistance, is easy to process, and has good gas and water vapor barrier properties. The adhesive can be a conventional adhesive.

[0024] The middle filling layer 2 in the utility model comprises an outer moisture barrier layer 2.1, an inner moisture barrier layer 2.3, and an intermediate support layer 2.2 located between the outer moisture barrier layer 2.1 and the inner moisture barrier layer 2.3. The material of the intermediate support layer 2.2 is polyamide. The intermediate support layer 2.2 and the outer barrier layer 1.3 are bonded by the outer moisture barrier layer 2.1. The materials of the outer moisture barrier layer 2.1 and the inner moisture barrier layer 2.3 are both linear low-density polyethylene. The thickness of the layers 2.3 is the same. The outer moisture barrier layer 2.1 and the inner moisture barrier layer 2.3 are made of linear low-density polyethylene, which makes the packaging film have higher tensile strength and better puncture resistance and tear resistance. The material of the middle support layer 2.2 is polyamide. Since polyamide has excellent mechanical properties and has high strength and hardness, the tensile strength and elastic modulus of the middle support layer 2.2 are relatively high, which can be used to match the tear resistance of the outer moisture barrier layer 2.1 and the inner moisture barrier layer 2.3.

[0025] The inner protective layer 3 includes a heat-sealing layer 3.1 and an inner barrier layer 3.2. The material of the heat-sealing layer 3.1 is ethylene-acrylic acid copolymer. The inner moisture barrier layer 2.3 and the inner barrier layer 3.2 are bonded by the heat-sealing layer 3.1. The material of the heat-sealing layer 3.1 is ethylene-acrylic acid copolymer, which can make the packaging film have excellent heat-sealing, tearing resistance, and adhesion, and can isolate air and water vapor. In addition, it has excellent bending cracking resistance and environmental stress cracking resistance and higher thermal stability. The material of the inner barrier layer 3.2 is a modified PVA coating liquid. The coating thickness of the modified PVA coating liquid is 0.65-0.75g / m2. The modified PVA coating liquid can make the part of the packaging film that contacts the packaging resistant to the contents and non-toxic. After the usable part is recovered, the modified PVA coating liquid can also be pollution-free, degradable, and cost-effective.

[0026] In this embodiment, the outer protective layer 1, the middle filling layer 2, and the inner protective layer 3 are bonded together by layer-by-layer adhesion. Figure 3 The product is supplied in the form of a recycling system. After the product has been used up, it can be recycled to make membrane products with relatively low hygiene requirements.

[0027] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A recyclable packaging film, characterized in that: The invention comprises an outer protective layer (1) and an inner protective layer (3); an intermediate filling layer (2) is arranged between the outer protective layer (1) and the inner protective layer (3); the outer protective layer (1) comprises, in order from the outer layer to the inner layer, an outer printing layer (1.1), an outer oxygen-isolating layer (1.2), and an outer barrier layer (1.3); the intermediate filling layer (2) comprises an outer moisture-isolating barrier layer (2.1), an inner moisture-isolating barrier layer (2.3), and an intermediate supporting layer (2.2) located between the outer moisture-isolating barrier layer (2.1) and the inner moisture-isolating barrier layer (2.3); and the inner protective layer (3) comprises a heat-sealing layer (3.1) and an inner barrier layer (3.2).

2. The recyclable packaging film according to claim 1, characterized in that: The material of the outer printed layer (1.1) is polyethylene terephthalate, the material of the outer oxygen-isolating layer (1.2) is polypropylene, and the material of the outer barrier layer (1.3) is nylon. The outer printed layer (1.1) and the outer oxygen-isolating layer (1.2), and the outer oxygen-isolating layer (1.2) and the outer barrier layer (1.3) are connected by adhesive.

3. The recyclable packaging film according to claim 1, characterized in that: The material of the intermediate support layer (2.2) is polyamide, and the intermediate support layer (2.2) and the outer barrier layer (1.3) are bonded via an outer moisture barrier layer (2.1).

4. The recyclable packaging film according to claim 1, characterized in that: The materials of the outer moisture barrier layer (2.1) and the inner moisture barrier layer (2.3) are both linear low-density polyethylene, and the thicknesses of the outer moisture barrier layer (2.1) and the inner moisture barrier layer (2.3) are the same.

5. The recyclable packaging film according to claim 1, characterized in that: The material of the heat-sealing layer (3.1) is ethylene-acrylic acid copolymer, and the inner moisture-proof barrier layer (2.3) and the inner barrier layer (3.2) are bonded via the heat-sealing layer (3.1).

6. The recyclable packaging film according to claim 1, characterized in that: The material of the inner barrier layer (3.2) is a modified PVA coating liquid, and the coating thickness of the modified PVA coating liquid is 0.65-0.75 g / m2.

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