Packaging bag film and packaging bag

Abstract

The utility model discloses a packaging bag film. The packaging bag film comprises a boiling-resistant high-barrier PET (polyethylene terephthalate) composite film, a PA (polyamide) film and a PP (polypropylene) film which are sequentially and tightly connected from top to bottom. The packaging bag film not only has excellent gas barrier property on oxygen, carbon dioxide, water vapor and the like, but also has good resistance on high-temperature sterilization treatment such as heating and cooking treatment and the like, and is a composite film which is particularly suitable for cooking and has excellent gas barrier property. The product is resistant to cooking and high in barrier, and the cooking-resistant and high-barrier PET composite film is adopted, so that the cooking-resistant and high-barrier PET base film has good toughness, creep resistance, fatigue resistance and friction resistance. By compounding the PA film and the PP film, the packaging bag film has the advantages of two-way stretchability and good rubbing resistance, and still keeps good rubbing resistance after high-temperature cooking. The packaging film is not only suitable for food packaging, but also suitable for medicine packaging.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging films, in particular to a packaging bag film and a packaging bag. Background Art

[0002] The packaging film of room temperature food usually adopts materials such as PE film. In order to prevent the content from deteriorating and deteriorating, the function required for the packaging material is barrier property. For example, the Chinese utility model patent with announcement number CN217865894U discloses a film and bag body with high barrier performance, including an inner PE layer, one side of the inner PE layer is compounded with an outer PE layer, and the outer PE layer is provided with a heat insulation coating on the side away from the inner PE layer. The heat insulation coating is made of PP material, and the surface of the outer PE layer is formed with concave and convex grooves. This technology has the effect of improving the oxygen barrier performance of the film, extending the shelf life of the built-in food, and also improving the heat resistance of the film.

[0003] However, the applicant has found through research that the traditional PE barrier packaging film has the following technical problems:

[0004] When food needs to be cooked at high temperature, the PE packaging film is not resistant to high temperatures and cannot protect the food after high temperature treatment. At the same time, the mechanical strength of the film decreases after high temperature treatment, making it difficult to prevent perforation of angular foods. Utility Model Content

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

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

[0007] In a first aspect, the utility model provides a packaging bag film, which 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.

[0008] In combination with the first aspect, the utility model also provides a first preferred implementation scheme of the first aspect. Specifically, 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 by pressurizing.

[0009] In combination with the first aspect, the utility model also provides a second preferred implementation manner of the first aspect. Specifically, the cooking-resistant high-barrier PET composite film includes 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.

[0010] In combination with the first aspect, the utility model further provides a third preferred implementation manner of the first aspect. Specifically, a resin layer is provided between the PET base film and the SiOx barrier film, and the thickness of the resin layer is 30 to 40 nm.

[0011] In combination with the first aspect, the utility model further provides a fourth preferred implementation manner of the first aspect, specifically, the resin layer is a polyurethane adhesive, and the polyurethane adhesive is coated on the PET base film to form a resin layer.

[0012] In a second aspect, the utility model further provides a packaging bag, wherein the bag body of the packaging bag is a closed packaging structure made of the packaging bag film described in the first aspect.

[0013] In combination with the second aspect, the utility model also provides a first preferred implementation of the second aspect. Specifically, the four sides of the bag body of the packaging bag are closed to form sealed edges, and the four corners of the bag body of the packaging bag are provided with chamfered corner structures.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a packaging bag film, which 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.

[0016] The packaging bag film of the utility model not only has excellent gas barrier properties against oxygen, carbon dioxide, water vapor, etc., but also has good resistance to high-temperature sterilization treatments such as heating and boiling treatments. It is particularly suitable for composite films with excellent gas barrier properties for boiling purposes. This product is resistant to boiling and has high barrier properties. By adopting a high-barrier PET composite film that is resistant to boiling, 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 boiling. It is not only suitable for food packaging purposes, but also can be used for pharmaceutical packaging purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the layer structure of a packaging bag film of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the packaging bag of the utility model;

[0020] In the figure:

[0021] 10-Retort-resistant high barrier PET composite film, 11-PET base film, 12-SiO x Barrier film, 13-resin layer;

[0022] 20-PA membrane;

[0023] 30-PP film;

[0024] 40-Bag body. DETAILED DESCRIPTION

[0025] 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.

[0026] The packaging film for room temperature food usually uses single-layer materials such as PE film. When the food needs to be cooked at high temperature, the PE packaging film is not resistant to high temperatures and cannot protect the 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 for angular foods. In order to prevent the content from deteriorating and deteriorating, the function required for the packaging material is barrier property. The high oxygen barrier performance after cooking or boiling can extend the shelf life of the product, reduce the number of structural layers, eliminate external packaging, and achieve "transparency" through high barrier properties to increase product value and enhance product attractiveness to meet customer needs.

[0027] To this end, the utility model provides a packaging bag film. The packaging bag film 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 boiling treatments. It is particularly suitable for a composite film with excellent gas barrier properties for boiling purposes. This product is resistant to boiling and has high barrier properties. By adopting a boiling-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 boiling. It is not only suitable for food packaging purposes, but also can be used for pharmaceutical packaging purposes.

[0028] like Figure 1-2 As shown, a preferred structure of a packaging bag film described in the utility model.

[0029] like Figure 1 As shown, the packaging bag film includes a cooking-resistant high-barrier PET composite film, a PA film and a PP film which are tightly connected from top to bottom.

[0030] 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.

[0031] 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.

[0032] In a specific implementation, an adhesive is provided between the retort-resistant high-barrier PET composite film 10, the PA film 20 and the PP film 30, and the retort-resistant high-barrier PET composite film, the PA film and the PP film are compounded into an integrated film structure by pressurization.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In another preferred embodiment, the PET base film 11 and SiO x A resin layer 13 is disposed between the barrier films 12, 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.

[0037] By coating a layer of polyurethane adhesive on the surface of the PET base film as a protective film, it can protect the SiO xThe 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.

[0038] 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.

[0039] like Figure 2 As shown, the utility model also provides a packaging bag, wherein the bag body 40 of the packaging bag is a closed packaging structure made of the above packaging bag film. The interior of the bag body is hollow to accommodate food, beverages, liquid medicine, etc.

[0040] In a specific implementation, the four sides of the bag body of the packaging bag are sealed to form sealed edges, and the four corners of the bag body of the packaging bag are all provided with rounded corner structures.

[0041] For other structures of the packaging bag film and packaging bag described in this embodiment, refer to the prior art.

[0042] 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 packaging bag film, characterized in that: The packaging bag film 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; 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 by pressurizing.

2. The packaging bag film according to claim 1, 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.

3. The packaging bag film according to claim 2, 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.

4. The packaging bag film according to claim 3, characterized in that: The resin layer is a polyurethane adhesive, which is coated on the PET base film to form a resin layer.

5. A packaging bag, characterized in that: The bag body of the packaging bag is a closed packaging structure made of the packaging bag film according to any one of claims 1 to 4.

6. A packaging bag according to claim 5, characterized in that: The four sides of the bag body of the packaging bag are sealed to form sealed edges, and the four corners of the bag body of the packaging bag are all provided with rounded corner structures.

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