Composite film for packaging cooking type suction nozzle doypack and cooking type suction nozzle doypack

Abstract

The utility model relates to the technical field of film packaging, in particular to a composite film for packaging a cooking type suction nozzle doypack and the cooking type suction nozzle doypack. The structure of an existing high-temperature cooking suction nozzle self-standing bag generally adopts a polyethylene glycol terephthalate / aluminum foil / nylon / polyethylene (PET / AL / NY / PE) structure, the structure has more film layers and is opaque, and the aluminum foil is not beneficial to later recovery. The barrier layer on the surface layer is designed to be a composite layer of the polyvinyl alcohol coating and the nylon base material layer, good barrier performance is provided for the composite film for packaging the cooking type suction nozzle standing pouch, in addition, the barrier layer / heat sealing layer is used for replacing a traditional PET / AL / NY / PE multi-layer structure, the film layer structure is simplified, and the problems that a traditional film layer is not transparent, and the film layer is not transparent are solved. And the aluminum foil is not favorable for later recovery. The composite film for packaging the cooking type suction nozzle standing pouches has the advantages of being simple in structure, excellent in barrier property, transparent, resistant to cooking and the like, and is particularly suitable for packaging the cooking type standing pouches with high barrier property requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of film packaging, in particular to a composite film for packaging a retort-type suction nozzle stand-up bag and a retort-type suction nozzle stand-up bag. Background Art

[0002] With their stylish and innovative appearance and high-end design, the spout stand-up pouch has become a new favorite in the packaging industry. It is particularly suitable for packaging foods such as juices, beverages, and sauces, providing excellent shelf display. This type of bag is extremely convenient to use: simply twist the spout cap for easy drinking and replace the lid after use, ensuring food freshness and hygiene, and suitable for multiple uses. Furthermore, the spout stand-up pouch excels in environmental protection. Compared with bottles of the same capacity, it reduces raw material consumption by over 30%, reduces storage and transportation costs of packaging materials by over 60%, and significantly reduces waste disposal. This packaging method not only reduces environmental impact but also enhances the consumer experience, making it a popular choice in the market.

[0003] Currently, the structure of high-temperature retort spout stand-up pouches generally uses polyethylene terephthalate / aluminum foil / nylon / polyethylene (PET / AL / NY / PE). This structure has many film layers and is opaque. The presence of aluminum foil also hinders subsequent recycling. Therefore, there is still a need to develop a high-barrier high-temperature retort spout stand-up pouch without aluminum foil for high-temperature retort spout packaging of sauces and other products. Summary of the Invention

[0004] In order to solve the above technical problems: the existing film structure has many film layers, is not transparent, contains aluminum foil and is not conducive to later recycling, etc. The utility model provides a composite film for packaging a retort-type suction nozzle stand-up bag, and its technical solution is as follows:

[0005] The composite film for packaging a retort-type nozzle stand-up bag has a film layer structure comprising a barrier layer, an adhesive layer and a heat-sealing layer arranged in sequence from top to bottom;

[0006] Wherein, the barrier layer includes a polyvinyl alcohol coating layer and a nylon substrate layer arranged in sequence from top to bottom.

[0007] In one embodiment, the barrier layer has a thickness of 15-35 μm.

[0008] In one embodiment, the polyvinyl alcohol coating is a water-resistant modified polyvinyl alcohol coating.

[0009] In one embodiment, the thickness of the polyvinyl alcohol coating is 0.1-1 μm.

[0010] In one embodiment, the nylon base material layer is made of polyamide film.

[0011] Preferably, the polyamide film is prepared by using existing polyamide 6 through a biaxial stretching process.

[0012] In one embodiment, the thickness of the nylon substrate layer is 15-30 μm.

[0013] In one embodiment, the adhesive layer is made of water-based polyurethane glue, and the thickness of the adhesive layer is 1-2 μm.

[0014] In one embodiment, the heat sealing layer is made of polypropylene.

[0015] Preferably, the polypropylene is cast polypropylene.

[0016] In one embodiment, the thickness of the heat-sealing layer is 40-120 μm.

[0017] The utility model also provides a retort-type suction nozzle stand-up bag, which is made of the composite film for packaging the retort-type suction nozzle stand-up bag.

[0018] Based on the above, compared with the prior art, the composite film for packaging a retort-type nozzle stand-up bag provided by the present invention has the following beneficial effects:

[0019] By designing the surface barrier layer as a composite layer of polyvinyl alcohol coating and nylon substrate layer, good barrier properties are provided for the composite film used for retort-type suction nozzle self-supporting pouch packaging. In addition, the use of barrier layer / heat-sealing layer to replace the traditional PET / AL / NY / PE multi-layer structure simplifies the film layer structure and solves the problem that the traditional film layer is opaque and contains aluminum foil, which is not conducive to later recycling.

[0020] The composite film for packaging a retort-type nozzle stand-up bag of the utility model has the advantages of simple structure, excellent barrier performance, transparency and resistance to retort, and is particularly suitable for packaging a retort-type stand-up bag with high barrier performance requirements.

[0021] In a preferred embodiment, the polyvinyl alcohol coating is a water-resistant modified polyvinyl alcohol coating, which can improve the stability of the retort-type suction nozzle stand-up pouch packaging in a high-humidity environment and maintain good barrier properties.

[0022] In a preferred embodiment, the nylon substrate layer is made of polyamide film, produced using a biaxially oriented polyamide 6. Polyamide films produced through biaxial oriented processes have their molecular chains or crystal planes aligned parallel to the film plane, resulting in excellent mechanical and barrier properties. This provides the retort-type spout stand-up pouch with tensile and puncture resistance, excellent gas and odor barrier properties, and good transparency and gloss.

[0023] In a preferred embodiment, the polypropylene is cast polypropylene, which has high heat sealing strength and is less prone to frosting and fogging, making the retort-type nozzle stand-up pouch more resistant to retort. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the membrane layer structure of the composite membrane provided by the present invention.

[0026] Reference numerals:

[0027] DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] The utility model provides Figure 1 The composite film for packaging a retort-type nozzle stand-up pouch shown in the embodiment comprises:

[0031] The film structure includes a barrier layer 10, an adhesive layer 20 and a heat-sealing layer 30 arranged in sequence from top to bottom;

[0032] The barrier layer 10 includes a polyvinyl alcohol coating layer 11 and a nylon substrate layer 12 arranged sequentially from top to bottom.

[0033] The composite film used in this utility model is a composite structure, which can take advantage of the advantages of each layer of film to meet the various performance requirements of the retort-type suction nozzle self-supporting bag packaging:

[0034] By designing the surface barrier layer as a composite layer of polyvinyl alcohol coating and nylon substrate, the composite film for retort-type spout stand-up pouch packaging provides good barrier properties.

[0035] By using a barrier layer / heat-sealing layer to replace the traditional PET / AL / NY / PE multi-layer structure, the film structure is simplified, solving the problem that the traditional film layer is opaque and contains aluminum foil that is not conducive to later recycling.

[0036] The composite film for retort-type nozzle stand-up pouch packaging has the advantages of simple structure, excellent barrier properties, mechanical properties, excellent folding resistance, transparency and retort resistance, and is particularly suitable for retort-type stand-up pouch packaging with high barrier performance requirements.

[0037] On the basis of the above solution, further, the thickness of the barrier layer 10 is 15-35 μm.

[0038] Preferably, the thickness of the barrier layer 10 is 25 μm

[0039] On the basis of the above solution, further, the polyvinyl alcohol coating 11 is a water-resistant modified polyvinyl alcohol coating.

[0040] The polyvinyl alcohol coating of the utility model is a water-resistant modified polyvinyl alcohol coating, which has the advantages of improving the stability of the retort-type suction nozzle stand-up bag packaging in a high-humidity environment and maintaining good barrier properties.

[0041] The water-resistant modified polyvinyl alcohol coating is prepared using existing water-resistant modified polyvinyl alcohol coating materials, and uses the water-resistant modified polyvinyl alcohol coating provided by "A coated high-barrier biaxially oriented polylactic acid film and its preparation method" with publication number CN110774713B.

[0042] On the basis of the above solution, further, the thickness of the polyvinyl alcohol coating 11 is 0.1-1 μm.

[0043] Preferably, the thickness of the polyvinyl alcohol coating 11 is 0.5 μm.

[0044] On the basis of the above solution, further, the material of the nylon base material layer 12 is polyamide film.

[0045] The polyamide film is prepared by adopting existing polyamide films.

[0046] Preferably, the polyamide film is prepared by using existing polyamide 6 through a biaxial stretching process.

[0047] The nylon substrate layer 12 of this utility model is made of polyamide film, produced using a biaxially oriented process using conventional polyamide 6. This biaxially oriented polyamide film aligns its molecular chains or crystal planes in a direction parallel to the film plane, resulting in an orderly arrangement and excellent mechanical properties and barrier properties. This provides the retort-type spout stand-up pouch with tensile strength and puncture resistance, excellent gas and odor barrier properties, and good transparency and gloss.

[0048] On the basis of the above solution, further, the thickness of the nylon base material layer 12 is 15-30 μm.

[0049] Preferably, the thickness of the nylon base material layer 12 is 25 μm.

[0050] On the basis of the above solution, further, the material of the adhesive layer 20 is water-based polyurethane glue.

[0051] The adhesive layer 20 of the present invention preferably adopts water-based polyurethane glue, which has the advantages of high bonding strength, uniform and transparent film formation, good water resistance, and non-toxicity and pollution-free, making the composite film for the cooking-type suction nozzle self-supporting bag packaging safer and more environmentally friendly.

[0052] The water-based polyurethane glue can be an existing water-based polyurethane glue, specifically a water-based polyurethane glue produced by Anhui Dawei Huatai New Materials Co., Ltd. This water-based polyurethane glue is non-toxic and pollution-free, and has high bonding strength. It should be noted that other existing non-toxic and pollution-free water-based polyurethane glues with high bonding strength can also be used, including but not limited to the above-mentioned embodiments.

[0053] On the basis of the above solution, further, the thickness of the adhesive layer 20 is 1-2 μm.

[0054] Preferably, the thickness of the adhesive layer 20 is 1.5 μm.

[0055] On the basis of the above solution, further, the heat sealing layer 30 is made of polypropylene.

[0056] Preferably, the polypropylene is cast polypropylene.

[0057] The cast polypropylene can adopt existing cast polypropylene, specifically cast polypropylene (CPP) composite film produced by Zhejiang Dahui New Materials Co., Ltd., which has high heat sealing strength and is less prone to frosting and fogging, making the retort-type nozzle self-supporting bag more resistant to retort.

[0058] On the basis of the above solution, further, the thickness of the heat sealing layer 30 is 40-120 μm.

[0059] Preferably, the thickness of the heat sealing layer 30 is 80 μm.

[0060] The utility model provides a composite film for packaging a retort-type suction nozzle stand-up bag. By designing the surface barrier layer as a composite layer of a polyvinyl alcohol coating and a nylon base material layer, the composite film for packaging a retort-type suction nozzle stand-up bag has good barrier properties. In addition, the use of a barrier layer / heat-sealing layer to replace the traditional PET / AL / NY / PE multi-layer structure simplifies the film layer structure and solves the problem that the traditional film layer is opaque and contains aluminum foil, which is not conducive to later recycling.

[0061] It should be noted that the water-resistant modified polyvinyl alcohol coating, water-based polyurethane glue and cast polypropylene are all existing materials that can be obtained by those skilled in the art.

[0062] The composite film for packaging retort-type suction nozzle stand-up pouches has the advantages of simple structure, excellent barrier properties, transparency and resistance to retort, and is particularly suitable for packaging retort-type stand-up pouches with high barrier properties requirements.

[0063] The retort-type suction nozzle stand-up bag provided by the utility model is made of the composite film for packaging the retort-type suction nozzle stand-up bag as described above, and its beneficial effects are as described above.

[0064] Although terms such as barrier layer, adhesive layer, and heat seal layer are frequently used herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite film for packaging a retort-type nozzle stand-up pouch, characterized by: The film layer structure comprises a barrier layer (10), an adhesive layer (20) and a heat-sealing layer (30) arranged in sequence from top to bottom; The barrier layer (10) comprises a polyvinyl alcohol coating (11) and a nylon substrate layer (12) arranged in sequence from top to bottom.

2. The composite film for packaging a retort-type nozzle stand-up pouch according to claim 1, characterized in that: The thickness of the barrier layer (10) is 15-35 μm.

3. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The polyvinyl alcohol coating (11) is a water-resistant modified polyvinyl alcohol coating (11).

4. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The thickness of the polyvinyl alcohol coating (11) is 0.1-1 μm.

5. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The material of the nylon base material layer (12) is polyamide film.

6. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The thickness of the nylon substrate layer (12) is 15-30 μm.

7. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The material of the adhesive layer (20) is water-based polyurethane glue, and the thickness of the adhesive layer (20) is 1-2 μm.

8. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The heat sealing layer (30) is made of polypropylene.

9. The composite film for packaging a retort-type spout stand-up pouch according to claim 1, characterized in that: The thickness of the heat-sealing layer (30) is 40-120 μm.

10. A retort-type spout stand-up pouch, characterized by: The composite film for packaging a retort-type suction nozzle stand-up bag according to any one of claims 1 to 9 is used.

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