Heating pressure-resistant packaging film

Abstract

The utility model relates to a heating pressure-resistant packaging film, which comprises a thermal insulation layer, a reinforcing layer, an electric heating layer and a protective layer, the electric heating layer is arranged between the protective layer and the reinforcing layer, the reinforcing layer is arranged between the thermal insulation layer and the electric heating layer, the electric heating layer is connected with a controller through an interface, the electric heating layer comprises a heating wire, the heating wire is arranged in a bending manner, and the protective layer is arranged between the thermal insulation layer and the electric heating layer. The reinforcing layer comprises first reinforcing strips and second reinforcing strips, the first reinforcing strips and the second reinforcing strips are arranged in a staggered mode to form a rhombic cavity, the heat insulation layer comprises an inner layer part and an outer layer part, a cavity is formed between the inner layer part and the outer layer part, balls are arranged in the cavity, and the balls are arranged in the cavity. The inner layer part and the outer layer part are both made of heat insulation materials. According to the heating pressure-resistant packaging film, the food heating capacity can be improved, continuous heating is achieved, the risk that the packaging film is broken is reduced, and meanwhile hands of a user can be prevented from being scalded when the packaging film is taken and placed.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to a heating and pressure-resistant packaging film. Background Art

[0002] In the prior art, food and other items usually need to be packaged using packaging films or packaging bags, and packaging bags can be made of packaging films. When existing foods are heated, they are usually heated using microwave ovens or self-heating packaging bags. For example, the patent with announcement number CN103508092B discloses a self-heating packaging bag for outdoor use, which uses chemical reactions to release heat, but its heat release duration is short and its heating capacity is weak. After the food is heated, the internal pressure will increase. In order to avoid the packaging film from being damaged due to the pressure generated during heating, the patent with announcement number CN103158929B discloses a heating packaging bag and its manufacturing method. The gas in the storage space expands after heating and compresses the two outer films, and multiple pre-broken parts are broken to allow the gas to flow out of the storage space through multiple pre-broken parts. That is, the pressure is reduced by actively opening the packaging bag. However, the above technical solution is prone to cause the outflow of food-related liquids; in addition, the spraying of high-temperature gas has certain safety hazards. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a heating and pressure-resistant packaging film which can improve the heating capacity and has strong pressure resistance.

[0004] The specific technical scheme is as follows: A heating and pressure-resistant packaging film, comprising an insulating layer, a reinforcing layer, an electric heating layer and a protective layer, wherein the electric heating layer is arranged between the protective layer and the reinforcing layer, the reinforcing layer is arranged between the insulating layer and the electric heating layer, the electric heating layer is connected to a controller through an interface, the electric heating layer comprises a heating wire, and the heating wire is arranged in a bent manner, the reinforcing layer comprises a first reinforcing strip and a second reinforcing strip, and a plurality of first reinforcing strips and a second reinforcing strip are staggered to form a diamond-shaped cavity, the insulating layer comprises an inner layer portion and an outer layer portion, a cavity is provided between the inner layer portion and the outer layer portion, a sphere is provided in the cavity, and a plurality of spheres are provided in the cavity, and the inner layer portion and the outer layer portion are both made of insulating material.

[0005] In some embodiments, a temperature measuring line is provided on the protective layer, and the temperature measuring line is connected to the interface.

[0006] In some embodiments, the thermal insulation layer and the protective layer are bonded to each other via a bonding layer.

[0007] In some embodiments, the heating wire is bent to form symmetrically distributed heating areas, and the interface is arranged between two heating areas.

[0008] In some embodiments, the outer layer includes a first base layer, a second base layer and a thermal insulation coating, and the thermal insulation coating is disposed between the first base layer and the second base layer.

[0009] In some embodiments, the second base layer is provided with a pattern layer, and a protective layer is provided on the pattern layer.

[0010] In some embodiments, the pattern layer includes a pattern and a printed coating.

[0011] In some embodiments, the pattern layer has a bottom layer, and an adhesive layer is provided between the bottom layer and the second base layer.

[0012] Technical effect of the utility model: the heating and pressure-resistant packaging film of the utility model can improve the heating capacity of food, realize continuous heating, reduce the risk of packaging film rupture, and at the same time, can prevent users from getting burned when taking and putting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a heated pressure-resistant packaging film according to an embodiment of the utility model.

[0014] Figure 2 It is an exploded view of a heating and pressure-resistant packaging film according to an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the heat insulation layer of an embodiment of the utility model.

[0016] Figure 4 It is a schematic diagram of the connection between the heat insulation layer and the protective layer of an embodiment of the utility model.

[0017] Figure 5 It is a schematic diagram of the outer layer portion of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The essential features and advantages of the present invention are further described below in conjunction with examples, but the present invention is not limited to the examples listed.

[0019] like Figures 1 to 5As shown, a heating and pressure-resistant packaging film 100 of this embodiment includes an insulation layer 1, a reinforcement layer 2, an electric heating layer 3 and a protective layer 4. The electric heating layer 3 is arranged between the protective layer 4 and the reinforcement layer 2, and the electric heating layer 3 can generate heat by electricity. The reinforcement layer 2 is arranged between the insulation layer 1 and the electric heating layer 3, and the reinforcement layer 2 can increase the strength of the packaging film. The insulation layer 1 is located at the outermost side and is used to isolate the heat generated by the electric heating layer 3. The electric heating layer 3 is connected to the controller 6 through the interface 5, and the electric heating layer 3 can be controlled to generate heat through the controller 6. The interface 5 and the controller 6 can be connected by existing wires or plug-in wires, such as USB cables. The electric heating layer 3 includes a heating wire 31, and the heating wire 31 is bent and arranged to increase the heating area. The reinforcement layer 2 includes a first reinforcement strip 21 and a second reinforcement strip 22. A plurality of first reinforcement strips 21 and second reinforcement strips 22 are staggered to form a rhombus cavity 23, so that the weight can be reduced and the structural strength can be enhanced at the same time. The heat-insulating layer 1 includes an inner layer 11 and an outer layer 12, and a cavity 13 is provided between the inner layer 11 and the outer layer 12, and a sphere 14 is provided in the cavity 13, and a plurality of spheres 14 are arranged in the cavity 13. The inner layer 11 and the outer layer 12 are both made of heat-insulating materials, and the inner and outer layers can be used to isolate the heat from being transferred outward, and the spheres 14 can further prevent the heat from being lost, and the spheres 14 are formed of foaming materials, such as EVA and other materials. In the above technical scheme, when the packaging film 100 is used for food packaging or forming a packaging bag, it can generate heat through the electric heating layer 3 to heat the food. At the same time, due to the provision of the reinforcement layer 2, its structural strength can be enhanced, and the risk of the packaging film rupture can be reduced. By providing the heat-insulating layer 1, it can prevent users from getting hot when taking and putting. Through the above technical scheme, it is possible to achieve heating and heat preservation of food, reduce the risk of packaging film rupture, and at the same time, it can prevent users from getting hot when taking and putting.

[0020] In this embodiment, the protective layer 4 is provided with a temperature measuring line 7, which is connected to the interface 5, so that the temperature of the electric heating layer can be obtained, which is convenient for controlling the temperature. The protective layer 4 can be made of a heat-conducting material to facilitate heat conduction. The thermal insulation layer 1 and the protective layer 4 are bonded by an adhesive layer 8, so that the packaging film structure is more stable. The heating line 31 is bent to form symmetrically distributed heating areas 32, and the interface 5 is arranged between the two heating areas 32.

[0021] In this embodiment, the outer layer 12 includes a first base layer 121, a second base layer 122 and a heat-insulating coating 123. The heat-insulating coating 123 is arranged between the first base layer 121 and the second base layer 122. The first and second base layers can be supported by existing materials such as PET, and the heat-insulating coating 123 can be made of existing coatings. The second base layer 122 is provided with a pattern layer 124, and a protective layer 125 is provided on the pattern layer 124. The protective layer 125 is used to protect the pattern layer 124. The pattern layer 124 is a printed pattern to increase the aesthetics of the packaging film. The pattern layer 124 includes a pattern 1241 and a printed coating 1242. The pattern layer 124 has a bottom layer 126, and an adhesive layer 127 is provided between the bottom layer 126 and the second base layer 122 to make the pattern layer printing more firm.

[0022] The heating and pressure-resistant packaging film of the present embodiment can improve the heating capacity of food, realize continuous heating, reduce the risk of packaging film rupture, and at the same time, can prevent users from getting burned when taking or putting food.

[0023] It should be pointed out that the above preferred embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A heating and pressure-resistant packaging film, characterized in that: It includes a heat-insulating layer, a reinforcing layer, an electric heating layer and a protective layer, wherein the electric heating layer is arranged between the protective layer and the reinforcing layer, the reinforcing layer is arranged between the heat-insulating layer and the electric heating layer, the electric heating layer is connected to a controller via an interface, the electric heating layer includes a heating wire, and the heating wire is arranged in a bent manner, the reinforcing layer includes a first reinforcing bar and a second reinforcing bar, and a plurality of first reinforcing bars and second reinforcing bars are staggered to form a diamond-shaped cavity, the heat-insulating layer includes an inner layer portion and an outer layer portion, a cavity is provided between the inner layer portion and the outer layer portion, a sphere is provided in the cavity, and a plurality of spheres are provided in the cavity, and the inner layer portion and the outer layer portion are both made of heat-insulating material.

2. The heating and pressure-resistant packaging film according to claim 1, characterized in that: A temperature measuring line is arranged on the protective layer and is connected with the interface.

3. The heating and pressure-resistant packaging film according to claim 2, characterized in that: The heat insulation layer and the protective layer are bonded to each other via a bonding layer.

4. The heating and pressure-resistant packaging film according to claim 3, characterized in that: The heating wire is bent to form symmetrically distributed heating areas, and the interface is arranged between the two heating areas.

5. The heating and pressure-resistant packaging film according to claim 1, characterized in that: The outer layer portion includes a first base layer, a second base layer and a heat-insulating coating layer, wherein the heat-insulating coating layer is arranged between the first base layer and the second base layer.

6. The heating and pressure-resistant packaging film according to claim 5, characterized in that: The second base layer is provided with a pattern layer, and a protective layer is provided on the pattern layer.

7. The heating and pressure-resistant packaging film according to claim 6, characterized in that: The pattern layer includes pattern and printing coating.

8. The heating and pressure-resistant packaging film according to claim 7, characterized in that: The pattern layer comprises a bottom layer, and an adhesive layer is arranged between the bottom layer and the second base layer.

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