Compound film lock fresh bag for fruit juice

Abstract

This utility model discloses a composite film fresh-locking bag for packaging fruit juice, comprising a bag body and a cap; the bag body is formed by heat sealing a composite film; the film layer structure of the composite film includes a barrier antibacterial substrate layer, an adhesive layer, and a heat-sealing layer arranged sequentially from the outside to the inside; wherein, the barrier antibacterial substrate layer is a five-layer co-extruded biaxially oriented nylon film, arranged sequentially from the outside to the inside as a printed composite layer, a first barrier layer, a barrier core layer, a second barrier layer, and an antibacterial composite layer. This utility model packaging bag has good oxygen barrier and antibacterial properties, effectively reducing the contact between fruit juice and outside air, slowing down the oxidative decomposition and spoilage of nutrients in the fruit juice, and maintaining its nutritional components and fresh taste. Furthermore, the barrier antibacterial substrate layer of the biaxially oriented nylon film using the structure of this utility model has good puncture resistance, effectively reducing losses caused by bag bursting, which is beneficial for the storage and transportation of bagged fruit juice.

Description

Technical Field

[0001] This utility model belongs to the field of food packaging bag technology, specifically relating to a composite film fresh-locking bag for packaging fruit juice. Background Technology

[0002] As people's living standards improve, fruit juice beverages are becoming increasingly popular among consumers. Compared with metal cans, plastic bottles, and paper-plastic packaging, bagged fruit juice packaging has advantages such as being lightweight and portable, low cost, and easy to produce, and has shown great potential in the consumer market in recent years.

[0003] Nutrients in fruit juice, such as vitamin C, phenolic compounds, and organic acids, are easily oxidized and deteriorate under the influence of oxygen, severely affecting the taste of the juice. To protect the nutrients in fruit juice from oxidative degradation as much as possible, heat sterilization, hot filling, vacuum packaging, and the use of additives are often used to maintain its sensory quality and extend its shelf life, but this also greatly increases the processing cost of fruit juice. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a composite film fresh-locking bag for packaging fruit juice. This composite film for packaging fruit juice has good oxygen barrier and antibacterial properties, which can effectively reduce the contact between fruit juice and the outside air, slow down the oxidation, decomposition and deterioration of nutrients such as vitamins in the fruit juice, and reduce the processing cost of fruit juice while maintaining its nutritional value and fresh taste, thus solving the problems in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a composite film fresh-locking bag for packaging fruit juice is provided, including a bag body and a cap; the bag body is made of composite film heat-sealed; the film layer structure of the composite film includes a barrier antibacterial substrate layer, an adhesive layer and a heat-sealing layer arranged sequentially from the outside to the inside; wherein, the barrier antibacterial substrate layer is a five-layer co-extruded biaxially stretched nylon film, which is arranged sequentially from the outside to the inside as a printed composite layer, a first barrier layer, a barrier core layer, a second barrier layer and an antibacterial composite layer.

[0006] In a preferred embodiment of this utility model, the total thickness of the barrier antibacterial substrate layer is 15-25 μm.

[0007] In a preferred embodiment of this utility model, the printed composite layer is a nylon resin layer containing a surface tension enhancer, an anti-adhesion agent, and a slip agent, and the thickness of the printed composite layer is 2-4 μm.

[0008] In a preferred embodiment of this utility model, the first barrier layer and the second barrier layer are a mixture of nylon 6 resin and layered nanoparticles, and the thickness of the first barrier layer and the second barrier layer is 3-5 μm.

[0009] In a preferred embodiment of this utility model, the barrier core layer is a mixture of nylon 6 resin and MXD6 resin, and the thickness of the barrier core layer is 5-7 μm.

[0010] In a preferred embodiment of this utility model, the antibacterial composite layer is a nylon resin layer containing an anti-adhesive, a slip agent and an inorganic antibacterial agent, and the thickness of the antibacterial composite layer is 2-4 μm.

[0011] In a preferred embodiment of this utility model, a corona layer is provided on the outer surface of the printed composite layer and the inner surface of the antibacterial composite layer.

[0012] In a preferred embodiment of this utility model, the adhesive layer is a two-component polyurethane adhesive layer with a thickness of 1-4 μm.

[0013] In a preferred embodiment of this utility model, the heat-sealing layer is a polyethylene film layer or a polypropylene film layer with a thickness of 50-80μm.

[0014] In a preferred embodiment of the present invention, the cover includes an upper cover and a lower cover. The lower cover is located at the only opening at the top of the bag. The upper cover has a cylindrical structure with a top seal and a bottom opening. The upper cover and the lower cover are sealed together.

[0015] In a preferred embodiment of this utility model, the cover is a screw cap, and the inner wall of the upper cover and the outer wall of the lower cover have internal and external threads that are screwed together.

[0016] Compared with the prior art, this technical solution has the following advantages:

[0017] This freshness-locking bag solution features excellent oxygen barrier properties and antibacterial properties, effectively reducing the contact between fruit juice and outside air, slowing down the oxidative decomposition and spoilage of nutrients in the juice, and preserving its nutritional components and fresh taste. The barrier and antibacterial substrate layer is a five-layer co-extruded biaxially oriented high-barrier antibacterial nylon film, which has excellent puncture resistance, effectively reducing losses caused by bag bursting, and facilitating the storage and transportation of bagged fruit juice. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a diagram showing the membrane structure of the composite film for a bag according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a fresh-locking bag according to an embodiment of the present invention;

[0021] Reference numerals: 10-composite film, 20-screw cap, 11-barrier antibacterial substrate layer, 12-adhesive layer, 13-heat seal layer, 111-printed composite layer, 112-first barrier layer, 113-barrier core layer, 114-second barrier layer, 115-antibacterial composite layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the term "inner" refers to the side in contact with the contents of the packaging, and "outer" refers to the side in contact with the external environment. Unless otherwise specified, the remaining components in the following embodiments can be commercially available or prepared using existing technology.

[0024] Example

[0025] This embodiment provides a composite film fresh-locking bag for packaging fruit juice, including a bag body and a cap, wherein the bag body is made of... Figure 1 The composite film is heat-sealed; the film structure of the composite film includes a barrier antibacterial substrate layer 11, an adhesive layer 12 and a heat-sealing layer 13 arranged sequentially from the outside to the inside; wherein, the barrier antibacterial substrate layer 11 is a five-layer co-extruded biaxially stretched nylon film, which is arranged sequentially from the outside to the inside as a printed composite layer 111, a first barrier layer 112, a barrier core layer 113, a second barrier layer 114 and an antibacterial composite layer 115.

[0026] In this embodiment, the printed composite layer 111 is a nylon resin layer containing a surface tension enhancer, an anti-adhesion agent, and a slip agent, which has good ink adhesion and interlayer adhesion, and can be printed or laminated with other films; the thickness of the printed composite layer 111 is 2μm.

[0027] The first barrier layer 112 and the second barrier layer 114 are a mixture of nylon 6 resin and layered nanoparticles. The layered nanoparticles can extend the gas permeation path in the film, hinder the diffusion of gas in the film collective, and improve the barrier properties of the film. The thickness of the first barrier layer 112 and the second barrier layer 114 is 3 μm.

[0028] The barrier core layer 113 is a mixture of nylon 6 resin and MXD6 resin. MXD6 has excellent oxygen and water barrier properties, which can give the film good barrier properties. The thickness of the barrier core layer 113 is 5μm.

[0029] The antibacterial composite layer 115 is a nylon resin layer containing an anti-adhesive, a slip agent, and an inorganic antibacterial agent, which can provide good antibacterial properties for the film. The thickness of the antibacterial composite layer 115 is 2 μm.

[0030] In addition, both the printed composite layer 111 and the antibacterial composite layer 115 of the barrier antibacterial substrate layer 11 have undergone corona treatment.

[0031] In this embodiment, the adhesive layer 12 is a solvent-free two-component polyurethane adhesive layer, which has the advantages of being non-toxic, pollution-free, and having high adhesive strength. The thickness of the adhesive layer 12 is 2 μm. The heat-sealing layer 13 is a polyethylene film layer or a polypropylene film layer, and the thickness of the heat-sealing layer is 60 μm.

[0032] In this embodiment, the cap is a screw cap 20, which includes an upper cap and a lower cap. The lower cap is located at the only opening at the top of the bag. The upper cap has a cylindrical structure with a top seal and a bottom opening. The inner wall of the upper cap and the outer wall of the lower cap have internal and external threads that are screwed together. The upper cap and the lower cap are sealed together by the threaded structure.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A composite film freshness retaining bag for fruit juice, characterized by: It includes a bag body and a cap body; the bag body is made of composite film heat-sealed; the film layer structure of the composite film includes a barrier antibacterial substrate layer, an adhesive layer and a heat-sealing layer arranged sequentially from the outside to the inside; wherein, the barrier antibacterial substrate layer is a five-layer co-extruded biaxially stretched nylon film, which is arranged sequentially from the outside to the inside as a printed composite layer, a first barrier layer, a barrier core layer, a second barrier layer and an antibacterial composite layer.

2. The composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The total thickness of the barrier antibacterial substrate layer is 15-25 μm.

3. The composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The thickness of the printed composite layer is 2-4 μm; the thickness of the first barrier layer is 3-5 μm; the thickness of the barrier core layer is 5-7 μm; the thickness of the second barrier layer is 3-5 μm; and the thickness of the antibacterial composite layer is 2-4 μm.

4. The composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The outer surface of the printed composite layer and the inner surface of the antibacterial composite layer are provided with a corona layer.

5. A composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The adhesive layer is a two-component polyurethane adhesive layer with a thickness of 1-4 μm.

6. The composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The heat-sealing layer is a polyethylene film layer or a polypropylene film layer with a thickness of 50-80 μm.

7. A composite film fresh-locking bag for packaging fruit juice according to claim 1, characterized in that: The cover includes an upper cover and a lower cover. The lower cover is located at the top of the bag. The upper cover has a cylindrical structure with a top seal and a bottom opening. The upper cover and the lower cover are sealed together.

8. A composite film fresh-locking bag for packaging fruit juice according to claim 7, characterized in that: The inner wall of the upper cover and the outer wall of the lower cover have internal and external threads that fit together for screwing.

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