Combined packaging bag structure

Abstract

The utility model discloses a combined packaging bag structure, which is used for packaging food, the combined packaging bag structure comprises an outer bag and an inner bag which are mutually independent, and the inner bag is arranged in a bag cavity of the outer bag; the outer bag is of a packaging bag structure made of an aluminum foil composite film; the inner bag comprises a boiling-resistant high-barrier PET composite film, a PA film and a PP film which are tightly connected in sequence from top to bottom. The combination mode of the outer bag and the inner bag is adopted, the advantages of the outer bag and the inner bag are complementary, the aluminum foil composite film generally has good moisture-proof, anti-oxidation and heat-insulating performance, food can be effectively prevented from being affected by the outside, and the shelf life of the food is prolonged. The inner bag fully guarantees the sealing performance, and the combination of the inner bag and the outer bag is necessary. And the inner bag can be used in more occasions, for example, after the outer bag is torn, the inner bag can be cooked and heated at high temperature, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging bags, in particular to a combined packaging bag structure. Background Art

[0002] Food packaging bags are bag-shaped containers used to hold and protect food, usually made of various types of materials to meet the packaging needs of different foods. The design and material selection of food packaging bags often depend on factors such as the characteristics of the packaged food, the need for preservation, the mode of transportation, and the consumer's usage habits. At present, for some liquid foods, solid foods, especially meat (braised meat, braised duck, etc.), aluminum-coated composite film packaging bags are commonly used for packaging.

[0003] The Chinese utility model patent with announcement number CN204916518U discloses an aluminum foil packaging bag for milk tea. The purpose is to provide a packaging bag that can ensure hygiene, excellent water-proof performance, and convenient storage and transportation. The technical solution is: the bag body with a sealed inner cavity is made of a composite material, and the sealed inner cavity is filled with liquid milk tea; the packaging bag is in the shape of a wine bottle with a large top and a small bottom, and a concave easy-to-tear opening is symmetrically made on the neck of the wine bottle. The middle layer of the composite material is an aluminum foil layer, the inner surface of the aluminum foil is compounded with a food-grade PE layer, and the outer surface is compounded with a PET layer.

[0004] However, the applicant has found through research that aluminized composite film packaging bags are prone to poor heat sealing and bag leakage, and lack heat sealing strength and sealing performance, resulting in the deterioration or contamination of the food inside. Although aluminized composite film packaging bags are widely used in food products, due to the high requirements for heat sealing technology, it increases the difficulty of food packaging processing, and the packaging sealing performance is prone to problems, resulting in food contamination. Utility Model Content

[0005] In order to overcome the above technical defects, the utility model provides a combined packaging bag structure.

[0006] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0007] The combined packaging bag structure of the utility model is used for packaging food. The combined packaging bag structure comprises an outer bag and an inner bag which are independent of each other. The inner bag is arranged in the bag cavity of the outer bag.

[0008] The outer bag is a packaging bag structure made of an aluminum foil composite film; the film material of the inner bag includes a cooking-resistant high-barrier PET composite film, a PA film and a PP film that are tightly connected in sequence from top to bottom.

[0009] Preferably, an adhesive is provided between the retort-resistant high-barrier PET composite film, the PA film and the PP film, and the retort-resistant high-barrier PET composite film, the PA film and the PP film are compounded into an integrated film structure by high temperature and pressure.

[0010] Preferably, the retort-resistant high-barrier PET composite film comprises a PET base film and a SiOx barrier film composited in sequence from top to bottom, and the SiOx barrier film is connected to the PET composite film.

[0011] Preferably, a resin layer is provided between the PET base film and the SiOx barrier film, and the thickness of the resin layer is 30-40 nm.

[0012] Preferably, the resin layer is a polyurethane adhesive, and the polyurethane adhesive is coated on the PET base film to form a resin layer.

[0013] Preferably, the outer edges of the outer bag and the inner bag are both provided with annular sealing edges so that the bag cavities of the outer bag and the inner bag are airtight.

[0014] Preferably, the outer contour of the inner bag is matched with the bag cavity of the outer bag, and the inner surface of the outer bag is tightly attached to the outer surface of the inner bag.

[0015] Preferably, when the outer contour of the inner bag is a rectangle, four corners of the inner bag are provided with rounded corner structures.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides a combined packaging bag structure for packaging food, the combined packaging bag structure comprising an outer bag and an inner bag which are independent of each other, the inner bag being arranged in a bag cavity of the outer bag; the outer bag being a packaging bag structure made of an aluminum foil composite film; the film material of the inner bag comprising a cooking-resistant high-barrier PET composite film, a PA film and a PP film which are tightly connected in sequence from top to bottom.

[0018] In the utility model, the outer bag is a packaging bag structure made of an aluminum foil composite film. The aluminum foil composite film generally has good moisture-proof, anti-oxidation and heat-insulating properties, and can effectively protect food from external influences and extend its shelf life.

[0019] The utility model provides an additional inner bag in the aluminum foil composite film packaging bag, and the inner bag is made of a specific composite film, which simply and efficiently solves the problem of insufficient heat sealing strength and sealing of the aluminum foil composite film packaging bag. On the other hand, the inner bag has high barrier properties and boiling resistance, and its heat sealing strength and sealing are superior to those of the aluminum foil composite film packaging bag. The inner bag has good heat sealing strength at the edge, and there is no problem of poor sealing.

[0020] The combination of outer bag and inner bag complements each other. Aluminum foil composite film usually has good moisture-proof, anti-oxidation and heat-insulating properties, which can effectively protect food from external influences and extend its shelf life. The inner bag fully guarantees the sealing performance, so the combination of the two is necessary. In addition, the inner bag can be used in more scenarios, such as after tearing open the outer bag, the inner bag can be heated by high-temperature steaming, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 It is a three-dimensional schematic diagram of the combined packaging bag structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the assembly of the combined packaging bag structure of the utility model;

[0024] Figure 3 This is a schematic diagram of tearing open the outer bag of the combined packaging bag structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the layer structure of the inner bag film material of the utility model;

[0026] In the figure:

[0027] 10-Outer bag;

[0028] 20-inner bag, 21-rounded corner structure;

[0029] 30-Retort-resistant high barrier PET composite film, 31-PET base film, 32-SiO x Barrier film, 33-resin layer;

[0030] 40-PA membrane;

[0031] 50-PP film. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] At present, aluminized composite film packaging bags are prone to poor heat sealing and bag leakage, and lack of heat sealing strength and sealing, which leads to the deterioration or contamination of the food inside. Although aluminized composite film packaging bags are widely used in food products, due to the high requirements for heat sealing technology, it increases the difficulty of food packaging processing, and the packaging sealing performance is prone to problems, resulting in food contamination.

[0034] To this end, this patent retains the aluminum-coated composite film packaging bag and has a built-in inner bag with good sealing, good barrier properties and resistance to retorting.

[0035] like Figure 1 to Figure 4 As shown, a preferred structure of a combined packaging bag structure described in the utility model.

[0036] like Figure 1 As shown, the combined packaging bag structure of the utility model is used for packaging food, and the combined packaging bag structure includes an outer bag 10 and an inner bag 20 which are independent of each other, and the inner bag is arranged in the bag cavity of the outer bag; the outer bag is a packaging bag structure made of an aluminum foil composite film; the inner bag includes a cooking-resistant high-barrier PET composite film, a PA film and a PP film which are tightly connected in sequence from top to bottom.

[0037] It can be understood that the outer bag is used to package the inner bag, and the inner bag is used to package food, and the inner bag is in direct contact with the food.

[0038] The utility model provides an additional inner bag in the aluminum foil composite film packaging bag, and the inner bag is made of a specific composite film, which simply and efficiently solves the problem of insufficient heat sealing strength and sealing of the aluminum foil composite film packaging bag. On the other hand, the inner bag has high barrier properties and boiling resistance, and its heat sealing strength and sealing are superior to those of the aluminum foil composite film packaging bag. The inner bag has good heat sealing strength at the edge, and there is no problem of poor sealing.

[0039] The combination of outer bag and inner bag complements each other. Aluminum foil composite film usually has good moisture-proof, anti-oxidation and heat-insulating properties, which can effectively protect food from external influences and extend its shelf life. The inner bag fully guarantees the sealing performance, so the combination of the two is necessary. In addition, the inner bag can be used in more scenarios, such as after tearing open the outer bag, the inner bag can be heated by high-temperature steaming, etc.

[0040] (1) About the outer bag of the utility model:

[0041] The outer bag is a packaging bag structure made of aluminum foil composite film. Aluminum foil composite film usually has good moisture-proof, anti-oxidation and heat-insulating properties, which can effectively protect food from external influences and extend its shelf life.

[0042] In terms of structure, the outer bag and the inner bag have the same shape, and adopt a rectangular outer contour commonly used in the industry. The outer contour of the inner bag is adapted to the bag cavity of the outer bag. In a specific implementation, Figure 2 As shown, the outer contour of the inner bag is a rectangle. When the outer contour of the inner bag is a rectangle, the four corners of the inner bag are provided with rounded corner structures 21. Because the inner bag is wrapped by the outer bag, in order to avoid the sharp corners of the inner bag piercing the outer bag and causing the loss of barrier performance, the rounded corner structure can be provided to simply improve and realize the combined packaging of the two groups.

[0043] On the other hand, the inner surface of the outer bag and the outer surface of the inner bag are tightly attached to each other. Such a design is to prevent the inner bag from rolling and shifting inside the outer bag. Because the inner bag has different shapes when packaging solid food, it is necessary to reduce the problem of the outer bag being pierced by the inner bag. In a specific implementation, through the vacuum sealing process, the bag cavity of the outer bag is set with a vacuum so that the inner surface of the outer bag and the outer surface of the inner bag are tightly attached. The outer bag and the inner bag are tightly attached by vacuum packaging.

[0044] (2) About the inner bag of the utility model:

[0045] When food needs to be cooked at high temperature, aluminum foil composite film packaging bags cannot be cooked at high temperature, and traditional PE packaging film packaging bags are not resistant to high temperatures and cannot protect food after high temperature treatment. At the same time, the mechanical strength of the film after high temperature treatment decreases, and it is difficult to prevent perforation of angular foods.

[0046] To this end, the present application provides an inner bag, the film material of the inner bag includes a cooking-resistant high-barrier PET composite film, a PA film and a PP film that are tightly connected in sequence from top to bottom. The film material of the inner bag of the utility model not only has excellent gas barrier properties to oxygen, carbon dioxide, water vapor, etc., but also has good resistance to high-temperature sterilization treatments such as heating and cooking treatments. In particular, it is a composite film with excellent gas barrier properties suitable for cooking purposes. This product is cooking-resistant and high-barrier. By adopting a cooking-resistant high-barrier PET composite film, it has a PET base film with good toughness, creep resistance, fatigue resistance and friction resistance. By composite PA film and PP film, the packaging bag film has biaxial stretchability and good rubbing resistance, and still maintains good rubbing resistance after high-temperature cooking.

[0047] like Figure 3 As shown, the packaging bag film includes a cooking-resistant high-barrier PET composite film 30, a PA film 40 and a PP film 50 which are tightly connected in sequence from top to bottom.

[0048] In a specific implementation, PA film is an existing film material in the art, which generally has excellent tear resistance, temperature resistance and chemical corrosion resistance, and is often used in food packaging. During the sterilization process, ordinary nylon film is easily corroded by oxygen, causing physical damage. Therefore, the utility model isolates oxygen corrosion by compounding PA film with other film materials, and PA provides good physical properties.

[0049] In a specific implementation, PP film is an existing film material in the art. Polypropylene (PP) film has good heat resistance, chemical resistance and mechanical strength, and is often used in food packaging, medical packaging and other fields.

[0050] In a specific implementation, an adhesive is provided between the retort-resistant high-barrier PET composite film, the PA film and the PP film, and the retort-resistant high-barrier PET composite film, the PA film and the PP film are compounded into an integrated film structure by pressurizing.

[0051] In the specific implementation, the adhesive can be any commercially available adhesive for packaging film lamination. The boiling-resistant high-barrier PET composite film is pressurized and laminated with PA and PP under the action of the adhesive under heating and drying conditions to prepare a packaging bag film.

[0052] In a preferred embodiment, the cooking-resistant high-barrier PET composite film comprises a PET base film and a SiO x Barrier film, the SiO x The barrier film is connected to the PET composite film.

[0053] In this technology, SiO x The preparation of barrier film is mainly carried out by plasma assisted chemical vapor deposition method to deposit barrier layer SiO x This barrier material has good barrier properties. The main advantages are high water and oxygen barrier properties, and the water and gas barrier properties can reach 0.1cm 3 / m 2 / day, transparent and visible, suitable for microwave heating, fragrance preservation, resistance to boiling, barrier properties are not affected by temperature and humidity, environmental protection and other comprehensive performance advantages. PET base film is used as the evaporation substrate.

[0054] In another preferred embodiment, the PET base film 31 and SiO x A resin layer 33 is disposed between the barrier films 32, and the thickness of the resin layer is 30-40 nm. The resin layer is a polyurethane adhesive, and the polyurethane adhesive is coated on the PET base film to form a resin layer.

[0055] By coating a layer of polyurethane adhesive on the surface of the PET base film as a protective film, it can protect the SiO x The protective effect of the barrier film. Polyurethane adhesive has good sealing properties and can be used to improve SiO x Adhesion of barrier film to SiO x Barrier films provide better gas barrier properties.

[0056] The composite structure of the cooking-resistant high-barrier PET composite film helps to improve the strength and puncture resistance of the packaging film, and is more conducive to use in high-temperature cooking situations.

[0057] In the specific implementation, the inner bag is made of transparent material, and it needs to be irradiated and sterilized before packaging the food. On the other hand, because it is transparent, it is more intuitive to see whether there are impurities inside and whether the food will deteriorate after filling.

[0058] For other structures of the combined packaging bag structure described in this embodiment, refer to the prior art.

[0059] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A combined packaging bag structure for food packaging, characterized in that: The combined packaging bag structure comprises an outer bag and an inner bag which are independent of each other, and the inner bag is arranged in the bag cavity of the outer bag; The outer bag is a packaging bag structure made of an aluminum foil composite film; The film material of the inner bag comprises a cooking-resistant high-barrier PET composite film, a PA film and a PP film which are tightly connected in sequence from top to bottom.

2. A combined packaging bag structure according to claim 1, characterized in that: An adhesive is arranged between the retort-resistant high-barrier PET composite film, the PA film and the PP film, and the retort-resistant high-barrier PET composite film, the PA film and the PP film are compounded into an integrated film structure through high temperature and pressure.

3. A combined packaging bag structure according to claim 2, characterized in that: The cooking-resistant high-barrier PET composite film comprises a PET base film and a SiO x Barrier film, the SiO x The barrier film is connected to the PET composite film.

4. A combined packaging bag structure according to claim 3, characterized in that: The PET base film and SiO x A resin layer is arranged between the barrier films, and the thickness of the resin layer is 30-40 nm.

5. The combined packaging bag structure according to claim 4, characterized in that: The resin layer is a polyurethane adhesive, which is coated on the PET base film to form a resin layer.

6. The combined packaging bag structure according to any one of claims 1 to 5, characterized in that: The outer edges of the outer bag and the inner bag are both provided with annular sealing edges so as to make the bag cavities of the outer bag and the inner bag airtight.

7. The combined packaging bag structure according to any one of claims 1 to 5, characterized in that: The outer contour of the inner bag is matched with the bag cavity of the outer bag, and the inner surface of the outer bag is tightly attached to the outer surface of the inner bag.

8. The combined packaging bag structure according to claim 7, characterized in that: When the outer contour of the inner bag is a rectangle, four corners of the inner bag are provided with rounded corner structures.

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