A high temperature and high pressure resistant and retortable packaging film

Abstract

The utility model discloses a packaging film that is resistant to high temperature and high pressure and can be boiled, and relates to the technical field of packaging films. The utility model includes a film body wound around the circumference of a collection roll, the film body includes an outer film, an aluminum foil and an inner film, the aluminum foil is fixed between the outer film and the inner film, the inner film is in a flat state, the aluminum foil is provided with a plurality of bent cavities, the outer film is attached to the aluminum foil, and the surface of the inner film, the bottom of the outer film and the bottom of the aluminum foil are provided with a plurality of groups of explosion-proof grooves. In the utility model, during the heating or boiling process of the film body, after the film body expands, the aluminum foil can have a better stretching effect, which is convenient for heating the food inside and preventing the expansion and explosion during heating. At the same time, explosion-proof grooves are provided on the outer film, the filter membrane and the inner film. When the film body expands to a certain extent, the explosion-proof grooves can tear the outer film, the filter membrane and the inner film apart, further preventing the film body from exploding and improving the safety of use.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging films, in particular to a packaging film which is resistant to high temperature and high pressure and can be steamed and boiled. Background Art

[0002] As the name implies, packaging film mainly refers to the film used for packaging items. Depending on the content of the packaging, the materials used are also different. When packaging food, the material process requirements are more stringent. The composite plastic packaging film that can be heated and steamed is also a kind of food packaging film and is the main raw material for making steaming bags.

[0003] In the process of packaging food, existing packaging films usually use negative pressure vacuum to package and preserve food, and the food can be directly heated using the packaging bag. However, the bag body supported by the existing packaging film is prone to expansion during the heating and cooking process. After the pressure continues to increase, it is easy to explode. Therefore, a high temperature and high pressure resistant and steamable packaging film is proposed. Utility Model Content

[0004] The utility model aims to provide a packaging film which is resistant to high temperature and high pressure and can be steamed. During the heating or steaming process of the film body, after the film body expands, the aluminum foil can have a good stretching effect, which is convenient for heating the food inside and prevents expansion and explosion during heating. At the same time, explosion-proof grooves are arranged on the outer film, the filter membrane and the inner film. When the film body expands to a certain extent, the explosion-proof grooves can tear the outer film, the filter membrane and the inner film, further preventing the film body from exploding, improving the safety of use, and solving the existing technical problems.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] A packaging film that is resistant to high temperature and high pressure and can be steamed, comprising: a film body wound around the circumference of a collection roll, the film body comprising an outer film, an aluminum foil and an inner film, the aluminum foil being fixed between the outer film and the inner film, the inner film being in a flat state, the aluminum foil being provided with a plurality of bent cavities, the outer film being bonded to the aluminum foil, and by providing a plurality of cavities on the aluminum foil, during the process of heating or steaming the film body, after the film body expands, the aluminum foil can have a better stretching effect, thereby facilitating the heating of the food inside and preventing expansion and explosion during heating.

[0007] As a further solution of the utility model, a plurality of groups of explosion-proof grooves are provided on the surface of the inner membrane, the bottom of the outer membrane and the bottom of the aluminum foil, and the plurality of groups of explosion-proof grooves are respectively located at the same horizontal plane as the plurality of cavities. By providing explosion-proof grooves on the outer membrane, the filter membrane and the inner membrane, when the membrane body expands to a certain extent, the explosion-proof grooves can tear the outer membrane, the filter membrane and the inner membrane, thereby further preventing the membrane body from exploding and improving the safety of use.

[0008] As a further solution of the present invention, the outer film is a polyester film.

[0009] As a further solution of the present invention, the inner layer film is a polypropylene film.

[0010] As a further solution of the utility model, the explosion-proof groove is narrow in the middle and wide at both ends.

[0011] As a further solution of the present invention, the thickness of the aluminum foil is 0.005mm-0.01mm.

[0012] The embodiments of the present invention have the following beneficial effects:

[0013] In the utility model, by arranging a plurality of cavities on the aluminum foil, when the membrane body is heated or steamed, after the membrane body expands, the aluminum foil can have a better stretching effect, which is convenient for heating the food inside and prevents expansion and explosion during heating;

[0014] In the utility model, by setting explosion-proof grooves on the outer membrane, the filter membrane and the inner membrane, when the membrane expands to a certain extent, the explosion-proof grooves can tear the outer membrane, the filter membrane and the inner membrane apart, further preventing the membrane from exploding and improving the safety of use;

[0015] In the utility model, during the process of heating or steaming the membrane body, after the membrane body expands, the aluminum foil can have a better stretching effect, which is convenient for heating the food inside and preventing expansion and explosion during heating. At the same time, explosion-proof grooves are arranged on the outer membrane, the filter membrane and the inner membrane. When the membrane body expands to a certain extent, the explosion-proof grooves can tear the outer membrane, the filter membrane and the inner membrane, further preventing the membrane body from exploding and improving the safety of use.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of a three-dimensional structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the membrane structure of an embodiment of the utility model;

[0020] Figure 3 The figure is a schematic diagram of the cross-sectional structure of a membrane body according to an embodiment of the present invention.

[0021] In the figure: 1. collecting roll; 2. membrane body; 3. outer membrane; 4. aluminum foil; 5. inner membrane; 6. cavity; 7. explosion-proof groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "opening", "upper", "middle", "length", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0025] Embodiment 1

[0026] See also Figure 1-Figure 3As shown, in this embodiment, a high-temperature and high-pressure resistant packaging film that can be steamed and cooked is provided, including: a film body 2 wound around the circumference of a collection roll 1, the film body 2 is made into a bag after being processed, and then the food is packaged and protected, the film body 2 includes an outer film 3, an aluminum foil 4 and an inner film 5, the aluminum foil 4 has good water resistance, gas resistance, light shielding and flavor retention, and has a light shielding effect, and can better protect the food, the aluminum foil 4 is fixed between the outer film 3 and the inner film 5, the inner film 5 is in a flat state, the aluminum foil 4 is provided with a plurality of bent cavities 6, the outer film 3 is attached to the aluminum foil 4, during the steaming process, when the film body 2 expands, the inner film 5 is first stretched when the internal air pressure increases, and at the same time the cavity 6 on the aluminum foil 4 is expanded, so as to facilitate the heating of the internal food.

[0027] Embodiment 2

[0028] Improved on the basis of embodiment 1: Refer to attached Figure 1-Figure 3 ,

[0029] In the utility model, a plurality of groups of explosion-proof grooves 7 are provided on the surface of the inner film 5, the bottom of the outer film 3 and the bottom of the aluminum foil 4. The plurality of groups of explosion-proof grooves 7 are respectively located at the same horizontal plane as the plurality of cavities 6. The internal pressure of the film body 2 continues to increase, and the expanded inner film 5, the aluminum foil 4 and the outer film 3 are torn apart under the action of the explosion-proof grooves 7, thereby avoiding explosion and improving the safety of use.

[0030] In particular, the outer film 3 is a polyester film.

[0031] In the present invention, the inner film 5 is a polypropylene film.

[0032] It should be noted that the explosion-proof groove 7 is narrow in the middle and wide at both ends, which is conducive to tearing the membrane body 2 when the membrane body 2 expands.

[0033] In the present invention, the thickness of the aluminum foil 4 is 0.005mm, 0.007mm or 0.01mm.

[0034] The use process and working principle of the technical solution of this utility model are as follows:

[0035] The membrane body 2 is composed of an outer membrane 3, an aluminum foil 4 and an inner membrane 5. After the membrane body 2 is processed, the food is packaged by utilizing the aluminum foil 4 therein. The aluminum foil 4 has good water resistance, gas resistance, light shielding and flavor retention properties, and also has a light shielding effect, which can better protect the food. During the cooking process of the membrane body 2 and the food, when the membrane body 2 expands, the inner membrane 5 is first stretched when the internal air pressure increases, and at the same time, the cavity 6 on the aluminum foil 4 is expanded, which is convenient for heating the internal food. If the internal pressure of the membrane body 2 continues to increase, the expanded inner membrane 5, aluminum foil 4 and outer membrane 3 are torn apart under the action of the explosion-proof groove 7, thereby avoiding the explosion and improving the safety of use.

[0036] It should be noted that, in the description of this specification, descriptions such as "first", "second", etc. are merely used to distinguish between various features and have no actual order or directional meaning, and this application is not limited to this.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A packaging film resistant to high temperature and high pressure and capable of being retorted, characterized in that: include: A film body (2) is wound around the circumference of a collection roll (1), the film body (2) comprising an outer film (3), an aluminum foil (4) and an inner film (5), the aluminum foil (4) being fixed between the outer film (3) and the inner film (5), the inner film (5) being in a flat state, the aluminum foil (4) being provided with a plurality of bent cavities (6), and the outer film (3) being bonded to the aluminum foil (4).

2. The high temperature and high pressure resistant and retortable packaging film according to claim 1, characterized in that: The surface of the inner film (5), the bottom of the outer film (3) and the bottom of the aluminum foil (4) are all provided with a plurality of groups of explosion-proof grooves (7), and the plurality of groups of explosion-proof grooves (7) are respectively located on the same horizontal plane as the plurality of cavities (6).

3. A high temperature and high pressure resistant and retortable packaging film according to any one of claims 1 to 2, characterized in that: The outer film (3) is a polyester film.

4. A high temperature and high pressure resistant and retortable packaging film according to any one of claims 1 to 2, characterized in that: The inner layer film (5) is a polypropylene film.

5. The high temperature and high pressure resistant and retortable packaging film according to claim 2, characterized in that: The explosion-proof groove (7) is narrow in the middle and wide at both ends.

6. The high temperature and high pressure resistant and retortable packaging film according to claim 1, characterized in that: The thickness of the aluminum foil (4) is 0.005mm-0.01mm.

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