Barrier composite for food products

Abstract

The utility model discloses a kind of barrier composite materials for food, including PET film layer and transparent PE film layer;The PET film layer with the transparent PE film layer between adhesive film layer composite connection is connected.The barrier composite material for food provided by the utility model is formed by PET film layer and transparent PE film layer composite, its permeability has been effectively reduced relative to single PE material layer, after packaging food, it can improve the shelf life effect of food, and then extend the shelf life of food.

Description

Technical Field

[0001] This utility model relates to the field of food packaging technology, and in particular to a barrier composite material for food. Background Technology

[0002] With increasing attention and higher requirements for food safety, food packaging technology is constantly developing. Food packaging protects food from damage caused by biological, chemical, and physical external factors during its distribution from the factory to the consumer. It can also maintain the stable quality of the food itself and facilitate its consumption.

[0003] PE film is widely used in food packaging due to its good flexibility and low-temperature resistance. However, PE film alone is not very effective at blocking gases, which makes its preservation and freshness of packaged food less than ideal.

[0004] Based on this, the present invention proposes a barrier composite material for food to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a barrier composite material for food, which improves the preservation and freshness of food.

[0006] To solve the above-mentioned technical problems, this utility model provides a barrier composite material for food, comprising a PET film layer and a transparent PE film layer;

[0007] The PET film layer and the transparent PE film layer are bonded together by an adhesive film layer.

[0008] Furthermore, the PET film layer is made of GL film.

[0009] Furthermore, the thickness of the PET film layer is 10-15 μm.

[0010] Furthermore, the thickness of the transparent PE film layer is 50-60 μm.

[0011] Furthermore, the adhesive film layer is a dry lamination adhesive.

[0012] Furthermore, the thickness of the adhesive film layer is 2-4 μm.

[0013] Furthermore, it also includes an ink printing layer, which is located between the PET film layer and the transparent PE film layer.

[0014] Furthermore, the ink printing layer is imprinted on the PET film layer.

[0015] Furthermore, the thickness of the ink printing layer is 10-14 μm.

[0016] Furthermore, the light transmittance T of the transparent PE film layer is ≥90%.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The barrier composite material for food provided by this utility model is formed by combining a PET film layer and a transparent PE film layer. Its air permeability is effectively reduced compared to a single PE material layer. After packaging food, it can improve the preservation and freshness of food, thereby extending the shelf life of food. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the barrier composite material used in food according to this utility model.

[0020] In the diagram: 1. PET film layer; 2. Transparent PE film layer; 3. Adhesive film layer; 4. Ink printing layer. Detailed Implementation

[0021] The barrier composite material for food according to this invention will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0022] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0023] like Figure 1 As shown in the figure, this utility model embodiment proposes a barrier composite material for food, including a PET film layer 1 and a transparent PE film layer 2; the PET film layer 1 and the transparent PE film layer 2 are compositely connected by an adhesive film layer 3.

[0024] PE has good flexibility and folding resistance, while PET is relatively stiff. In this embodiment, PET film layer 1 and transparent PE film layer 2 are compositely connected to form PE+PET composite material. This improves the flexibility of the composite material while maintaining a certain stiffness, and can better protect food.

[0025] More importantly, while PE itself has a certain gas barrier property, the addition of PET further enhances its barrier properties against water vapor and oxygen. This allows PE+PET composite materials to improve the preservation and freshness of food after packaging, thereby extending the shelf life of the food.

[0026] In the above embodiments, the PET film layer 1 is a GL film.

[0027] GL film is a transparent vapor-deposited film made by vapor-depositing silicon and aluminum oxide onto PET and ONY substrates. This special process forms a vapor-deposited layer with unique properties on the PET and ONY substrates, giving the film excellent gas barrier properties. Specifically, it has the following advantages:

[0028] (1) Excellent barrier properties: It has a good barrier effect against oxygen and water vapor, which can effectively prevent the contents from oxidizing and getting damp. It has good aroma preservation properties and can preserve the freshness of food and other items for a long time.

[0029] (2) Strong stability: Its barrier properties against oxygen and water vapor are not significantly weakened by changes in temperature and humidity.

[0030] (3) High transparency: High transparency allows consumers to clearly see the contents, which helps to stimulate their desire to buy.

[0031] (4) Environmental protection and safety: It can be heated in an electronic microwave oven. No harmful toxic gases are produced during incineration, and no gas residue is left.

[0032] (5) Easy to process: After a protective layer is applied to the barrier layer, it can be directly processed by lamination, printing and other operations.

[0033] Furthermore, the thickness of the PET film layer 1 is 10-15 μm, which meets the usage requirements and performance requirements of composite materials while reasonably controlling costs.

[0034] In the above embodiments, the thickness of the transparent PE film layer 2 is 50-60μm, which meets the usage requirements and performance requirements of composite materials while reasonably controlling costs.

[0035] Specifically, the transparent PE film layer 2 is made using a casting process to ensure that the transparent PE film layer 2 has good strength, toughness and transparency.

[0036] In the above embodiments, the adhesive film layer 3 is a dry lamination adhesive.

[0037] Specifically, dry laminating adhesive is an adhesive used in dry lamination processes to bond two materials together. Its main components include resin, curing agent, solvent, and additives. Dry laminating adhesive has the following characteristics:

[0038] (1) High bonding strength: It can form a strong bond between different materials, ensuring that the composite material will not delaminate during use.

[0039] (2) Good flexibility: The cured adhesive layer has a certain elasticity and flexibility, which can adapt to the expansion and contraction of different materials in different environments. It is not easy to crack or delaminate, and it is especially suitable for composite materials that need to be folded, bent and other processes.

[0040] (3) Good weather resistance and chemical stability: It has good water resistance, oil resistance, acid and alkali resistance and high and low temperature resistance, and can maintain stable bonding performance under different environmental conditions, thus extending the service life of composite materials.

[0041] (4) High adaptability: It can adapt well to different materials, thicknesses and composite processes by adjusting the formula and process parameters according to different composite needs.

[0042] (5) Good operation performance: During the coating process, it has good leveling and wetting properties, can be evenly coated on the surface of the substrate, and has a moderate drying speed, which is convenient for continuous production on dry laminating equipment and improves production efficiency.

[0043] In the above embodiments, preferably, the thickness of the adhesive film layer 3 is 2-4 μm to ensure effective bonding strength.

[0044] In one specific embodiment, the barrier composite material for food also includes an ink printing layer 4 for displaying food-related information; the ink printing layer 4 is located between the PET film layer 1 and the transparent PE film layer 2 to provide effective protection for the ink printing layer 4.

[0045] Specifically, the ink printing layer 4 is imprinted on the PET film layer 1.

[0046] The surface of PET material is relatively smooth but has a microscopic uneven structure. These microscopic structures can increase the contact area between the ink printing layer 4 and the PET film layer 1, forming a mechanical anchoring effect and allowing the ink to adhere better.

[0047] Preferably, the thickness of the ink printing layer 4 is 10-14μm, which ensures that the colors of the patterns, texts and other information are bright, clear and highly recognizable, while avoiding the impact of excessive thickness of the ink printing layer 4 on the flexibility and adhesion of the composite material.

[0048] Furthermore, the light transmittance T of the transparent PE film layer 2 is ≥90%, so as to avoid the transparent PE film layer 2 from affecting the display of the ink printing layer 4 and the food.

[0049] In summary, compared with the prior art, this utility model has at least the following advantages:

[0050] The barrier composite material for food provided by this utility model is formed by combining a PET film layer and a transparent PE film layer. Its air permeability is effectively reduced compared to a single PE material layer. After packaging food, it can improve the preservation and freshness of food, thereby extending the shelf life of food.

[0051] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A barrier composite material for food, characterized in that, Includes PET film layer and transparent PE film layer; The PET film layer and the transparent PE film layer are bonded together by an adhesive film layer; the PET film layer is a GL film, which is a transparent vapor-deposited film made by vapor-depositing silicon and aluminum oxide onto PET and ONY; the light transmittance T of the transparent PE film layer is ≥90%; It also includes an ink printing layer, which is located between the PET film layer and the transparent PE film layer; the ink printing layer is imprinted on the PET film layer.

2. The barrier composite material for food as described in claim 1, characterized in that, The thickness of the PET film is 10-15µm.

3. The barrier composite material for food as described in claim 1, characterized in that, The thickness of the transparent PE film is 50-60µm.

4. The barrier composite material for food as described in claim 1, characterized in that, The adhesive film layer is a dry lamination adhesive.

5. The barrier composite material for food as described in claim 1, characterized in that, The thickness of the ink printing layer is 10-14µm.

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