A high-barrier easy-to-tear flavor syrup composite film and a packaging bag thereof

Abstract

The utility model relates to packaging material technical field, especially a kind of composite film for high-barrier easy-to-tear flavor syrup and its packaging bag.The composite film for high-barrier easy-to-tear flavor syrup, its film layer structure is sequentially straight tear aluminizing layer, first adhesive layer, barrier antibacterial layer, second adhesive layer and heat-sealing layer from outside to inside;The straight tear aluminizing layer is composed of straight-line easy-to-tear biaxially oriented polyamide film layer and aluminizing layer, and the aluminizing layer is attached to the side of straight-line easy-to-tear biaxially oriented polyamide film layer towards the outside of composite film.The composite film has good straight-line easy-to-tear property, high-barrier property and antibacterial property, can effectively guarantee flavor syrup quality, is convenient for consumer to open, and is suitable for flavor syrup packaging scene.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, and in particular to a high-barrier, easy-tear composite film for flavored syrups and its packaging bag. Background Technology

[0002] Flavored syrups are syrups made primarily from sugar, starch sugar, or erythritol and stevia, with the addition of water and other auxiliary materials, and with or without food additives. They are produced through processes such as dissolving, filtering, blending, sterilization, and bottling. Primarily used for flavoring food and beverages, they are raw materials specifically for beverages. Common flavored syrups include zero-calorie syrups, caramel-flavored syrups, vanilla-flavored syrups, fruit-flavored syrups, and coffee-flavored syrups.

[0003] With the rise of home-based beverage culture, the market demand for flavored syrups that can give drinks rich colors and aromas is gradually increasing. However, flavored syrups have a high sugar content, are prone to moisture absorption and fermentation, and some flavor substances are sensitive to oxygen and are easily oxidized and deteriorated, which places high demands on packaging.

[0004] In summary, those skilled in the art urgently need a composite film and its packaging bag for flavored syrups that combines high barrier properties and easy tearing, which can effectively block moisture and oxygen, extend the shelf life of the syrup, and at the same time, its easy tearing effect can effectively improve the customer's user experience. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a high-barrier, easy-tear composite film for flavored syrups. The film structure of the composite film includes, from the outside to the inside, a tear-resistant aluminum-plated layer, a first adhesive layer, a barrier antibacterial layer, a second adhesive layer, and a heat-sealing layer. The tearable aluminized layer is composed of a straight-tearable biaxially oriented polyamide film layer and an aluminized layer, wherein the aluminized layer is attached to the side of the straight-tearable biaxially oriented polyamide film layer facing the outside of the composite film.

[0006] Furthermore, it also includes a printing layer, which is disposed on the outer side of the composite film.

[0007] Furthermore, the printed layer is formed by printing ink onto the direct-tear aluminum-plated layer, and the thickness of the printed layer is 1.0-2.0 μm.

[0008] Furthermore, the thickness of the tearable aluminized layer is 40-100μm; wherein, the thickness of the tearable biaxially oriented polyamide film layer is 10-25μm, and the thickness of the aluminized layer is 30-75μm.

[0009] Furthermore, the first adhesive layer and the second adhesive layer are polyurethane adhesive layers, and the thickness of the polyurethane adhesive layer is 1.0-4.5μm.

[0010] Furthermore, the barrier antibacterial layer is a barrier-modified polyamide film layer containing an antibacterial agent.

[0011] Furthermore, the heat-sealing layer is a polyethylene film layer or a polypropylene film layer.

[0012] Furthermore, the thickness of the barrier antibacterial layer is 10-25 μm; the thickness of the heat-sealing layer 16 is 30-80 μm.

[0013] This utility model also provides a packaging bag, which is formed by heat sealing with a composite film for high-barrier, easy-tear flavored syrup as described above.

[0014] Furthermore, the edge of the packaging bag is provided with an easy-tear notch and an extrusion opening, and the direction of the easy-tear notch is consistent with the tearing direction of the direct-tear aluminum-plated layer.

[0015] Based on the above, compared with the prior art, the high-barrier, easy-tear composite film for flavored syrups provided in this application has the following beneficial effects: The packaging bags prepared using the composite film provided in this application have excellent oxygen and water barrier properties, effectively delaying the spoilage process of syrup caused by the penetration of water vapor and oxygen. The aluminum coating also provides a certain degree of light-blocking effect, reducing flavor degradation caused by light exposure and extending the shelf life of the flavored syrup. Furthermore, the packaging bags prepared using this composite film have good tear resistance, providing customers with a superior user experience.

[0016] Other features and beneficial effects of this invention will be set forth in the following description, and in part will be obvious from the description or may be learned by practicing the invention. The objectives and other beneficial effects of this invention can be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0017] 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.

[0018] Figure 1 A layer structure diagram of a composite membrane according to an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a packaging bag composed of a composite film according to an embodiment of this utility model.

[0019] Figure label: A-Bag body, B-Easy-tear opening, C-Extrusion opening, 11-Printed layer, 12-Direct-tear aluminized layer, 13-First adhesive layer, 14-Barrier antibacterial layer, 15-Second adhesive layer, 16-Heat-seal layer, 121-Aluminized layer, 122-Straight-line easy-tear biaxially oriented polyamide film layer. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element 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 utility model. "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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise specified, the remaining components in the following embodiments can be commercially available or prepared using existing technology.

[0022] To provide a composite film and packaging bag for flavored syrups that effectively blocks moisture and oxygen, extending the shelf life of syrups, while also offering easy-tear properties to enhance the customer's user experience, this utility model provides the following... Figure 1-2 Examples of the composite film and its packaging bag are shown.

[0023] Example This embodiment provides a high-barrier, easy-tear flavored syrup bag, including a bag body A, an easy-tear opening B, and an extrusion opening C, wherein the bag body A adopts the following... Figure 1 The composite film is heat-sealed; the film layer structure of the composite film includes a printing layer 11, a direct-tear aluminum-plated layer 12, a first adhesive layer 13, a barrier antibacterial layer 14, a second adhesive layer 15 and a heat-sealing layer 16 arranged sequentially from the outside to the inside. The tearable aluminized layer 12 is composed of a straight tearable biaxially oriented polyamide film layer 122 and an aluminized layer 121, wherein the aluminized layer 121 is attached to the side of the straight tearable biaxially oriented polyamide film layer 122 facing the outside of the composite film.

[0024] In this embodiment, the thickness of the printing layer 11 is 2μm, and the printing layer 11 can be printed on the direct-tear aluminum-plated layer 12 using commercially available inks.

[0025] The thickness of the direct-tear aluminized layer 12 is 55μm. In this embodiment, the direct-tear aluminized film disclosed in CN111516334A, "A Straight-Tearable Aluminized Nylon Film and Its Preparation Method", is adopted. The direct-tear aluminized film has the advantages of excellent barrier properties, aroma retention and straight-tearability, and can still have good straight-tear performance after being laminated with PP or PE.

[0026] The aluminum plating layer 121 has a thickness of 40 μm, and the straight-line easy-tear biaxially oriented polyamide film layer 122 has a thickness of 15 μm.

[0027] The thickness of the barrier antibacterial layer 14 is 15 μm. In this embodiment, the nylon substrate layer disclosed in CN112318891A "A high barrier antibacterial nylon composite film and its preparation method" is used. The nylon substrate layer obtains excellent oxygen barrier performance and antibacterial properties by adding an organic-inorganic hybrid antibacterial agent formed by adding a layered metal hydroxide loaded with metal salt.

[0028] The first adhesive layer 13 and the second adhesive layer 15 are polyurethane adhesive layers. The polyurethane can be made using commercially available solvent-free two-component polyurethane adhesives, which have the advantages of being non-toxic, pollution-free, and having high adhesive strength. The thickness of the polyurethane adhesive layer is 2.0 μm.

[0029] The heat-sealing layer 16 is a polyethylene film layer or a polypropylene film layer, and the thickness of the heat-sealing layer 16 is 60 μm.

[0030] In summary, the high-barrier, easy-tear flavored syrup bag of this embodiment has the following beneficial effects: The high-barrier, easy-tear flavored syrup bag of this embodiment improves the easy-tear opening experience through the direct-tear aluminized layer 12 used in bag body A. The direct-tear aluminized layer 12 has a total thickness of 55μm and is composed of a 15μm thick straight-tear biaxially oriented polyamide film layer 122 and a 40μm thick aluminized layer 121. The aluminized layer 121 is attached to the side of the film layer facing the outside of the composite film. Combined with the easy-tear opening B set in bag body A, the syrup bag can be smoothly torn in a preset direction, effectively improving the convenience of opening for consumers. At the same time, even after the direct-tear aluminized film is laminated with the subsequent heat-sealing layer 16 of PP or PE material, it can still maintain good straight-tear performance, ensuring a stable easy-tear effect. In terms of barrier and antibacterial preservation, the barrier and antibacterial layer 14 in the composite film of bag A has a thickness of 15μm and adopts a high-barrier antibacterial nylon substrate layer. The layered metal hydroxide organic-inorganic hybrid antibacterial agent loaded with metal salts contained therein can effectively inhibit the growth of microorganisms and ensure the hygiene and safety of syrup. At the same time, the barrier and antibacterial layer 14 works synergistically with the aluminum-plated structure of the direct-tear aluminum-plated layer 12 to strongly block the penetration of external oxygen and water vapor. The aluminum-plated layer 121 also has a light-shielding effect, reducing the impact of light on the flavor of syrup, thereby delaying the deterioration of syrup caused by moisture absorption and oxidation, maintaining the original flavor of syrup for a long time, and significantly extending the shelf life of the product. In terms of structural stability and environmental safety, the first adhesive layer 13 and the second adhesive layer 15 in the composite film are both solvent-free two-component polyurethane adhesive layers with a thickness of 2.0μm. This adhesive is non-toxic, non-polluting, and has high bonding strength. The printed layer 11, the direct-tear aluminized layer 12, the barrier antibacterial layer 14, and the 60μm thick polyethylene or polypropylene heat-sealing layer 16, which are made by printing with existing inks on the market, are tightly bonded together to avoid delamination between layers and ensure the overall structural stability. The polyethylene or polypropylene film selected for the heat-sealing layer 16 has excellent heat-sealing performance, which makes the heat-sealed edge of the bag A firm and reliable, and can ensure the sealing effect when containing syrup to prevent leakage.

[0031] Overall, the synergistic effect of the thickness and material properties of each film layer enables the syrup bag to simultaneously integrate the characteristics of easy tearing and opening, high barrier preservation, structural stability, and environmental safety. This meets the packaging needs of flavored syrups, which are prone to moisture absorption, fermentation, and oxygen sensitivity, thereby enhancing the product's practical value and market competitiveness.

[0032] Although this document frequently uses terms such as printed layer, direct-tear aluminum-plated layer, first adhesive layer, barrier antibacterial layer, second adhesive layer, and heat-sealing layer, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 for high-barrier, easy-tear flavored syrups, characterized in that: The composite membrane has a membrane structure comprising, from the outside to the inside, a tear-off aluminum-plated layer (12), a first adhesive layer (13), a barrier antibacterial layer (14), a second adhesive layer (15), and a heat-sealing layer (16). The direct-tear aluminized layer (12) is composed of a straight-tear biaxially oriented polyamide film layer (122) and an aluminized layer (121). The aluminized layer (121) is attached to the side of the straight-tear biaxially oriented polyamide film layer (122) facing the outside of the composite film.

2. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: It also includes a printing layer (11) disposed on the outer side of the composite film.

3. The composite film for high-barrier, easy-tear flavored syrups according to claim 2, characterized in that: The printed layer (11) is made by printing ink on the direct-tear aluminum-plated layer (12), and the thickness of the printed layer (11) is 1.0-2.0μm.

4. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: The thickness of the tearable aluminum plating layer (12) is 40-100 μm; wherein, the thickness of the tearable biaxially oriented polyamide film layer (122) is 10-25 μm, and the thickness of the aluminum plating layer (121) is 30-75 μm.

5. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: The first adhesive layer (13) and the second adhesive layer (15) are polyurethane adhesive layers, and the thickness of the polyurethane adhesive layer is 1.0-4.5μm.

6. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: The barrier antibacterial layer (14) is a barrier modified polyamide film layer containing antibacterial agents.

7. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: The heat-sealing layer (16) is a polyethylene film layer or a polypropylene film layer.

8. The composite film for high-barrier, easy-tear flavored syrups according to claim 1, characterized in that: The thickness of the barrier antibacterial layer (14) is 10-25 μm; the thickness of the heat-sealing layer (16) is 30-80 μm.

9. A packaging bag, characterized in that: The high-barrier, easy-tear flavored syrup composite film as described in any one of claims 1-8 is formed by heat sealing.

10. The packaging bag according to claim 9, characterized in that: The packaging bag body (A) has an easy-tear notch and an extrusion port (C) on its edge, and the direction of the easy-tear notch is consistent with the tearing direction of the direct-tear aluminum plating layer (12).

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