A portable food warming cover which does not fade
By using composite layer materials and an easy-tear design, the portable food insulation cover solves the problems of size limitations and aluminum plating fading in existing technologies, achieving a portable and safe food insulation effect.
Patent Information
- Application Number
- CN202521092889.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-19
- Estimated Expiration
- 2035-05-30
AI Technical Summary
Existing food insulation devices have problems such as size limitations, difficulty in carrying and storing, and the risk of food safety hazards caused by the peeling and fading of the aluminum coating when exposed to high temperature water vapor.
This portable food warming cover is made of composite layer materials, including a polyethylene layer, a metal aluminum layer, and a polyethylene terephthalate layer. It features folded edges and easy-tear tabs, and the opening is tightened by an elastomer, providing good heat retention and colorfastness.
It achieves portable heat preservation without space limitations, avoids fading of the aluminum coating, improves ease of use and safety, reduces space occupation, and meets the need to keep a single food item warm.
Smart Images
Figure CN224369242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food insulation technology, and more specifically to a colorfast portable food insulation cover. Background Technology
[0002] As people's living standards improve, the demand for food insulation is also increasing. Maintaining the temperature of food is an important issue when dining out, having picnics, or having family gatherings. Currently, common food insulation devices on the market mainly include insulated boxes, insulated bags, and insulated covers.
[0003] As a common heat preservation device, food warming covers have been widely used in many fields. Food needs to be kept warm after it is cooked and served but not eaten in time. Currently, the preservation of food or leftovers is basically done by wrapping them with plastic wrap. Although the traditional folding food warming cover can meet certain usage requirements, it also has significant drawbacks. Due to size limitations, it cannot keep a single food warm, it is not easy to carry, and it is inconvenient to store and takes up space. On the other hand, the aluminum-plated food warming cover solves some of the shortcomings of the traditional folding food warming cover, but there is a problem that the aluminum plating layer will peel off and fade when exposed to high temperature water vapor, posing a food safety hazard. Utility Model Content
[0004] The purpose of this invention is to provide a non-fading portable food insulation cover to solve the problems mentioned in the background art. This invention is simple to operate, not limited by space or the size of bowls and plates, easy to carry and store, and will not peel or fade when exposed to high temperature water vapor, and has no food safety issues.
[0005] To achieve the above objectives, this utility model employs the following technical means:
[0006] A colorfast portable food insulation cover includes a bag body made of composite layer material and having an opening. The bag body is folded at the opening to form a folded edge. An elastic body for tightening the opening is heat-sealed inside the folded edge of the bag body. An even number of easy-tear tabs are evenly arranged around the circumference of the opening of the bag body.
[0007] In some embodiments, the composite layer material has at least three layers.
[0008] In some embodiments, the composite layer material consists of a polyethylene layer, an aluminum layer, and a polyethylene terephthalate layer from the inside out.
[0009] In some embodiments, the folded edge is formed by turning the bag opening inward.
[0010] In some embodiments, the folded edge is formed by turning the bag opening outwards.
[0011] In some embodiments, the bag body includes:
[0012] Top of the bag;
[0013] The first curved section is symmetrically arranged along the front and rear edges of the bag.
[0014] The transition section is symmetrically arranged along the left and right edges of the bag body and connected to the first curved section;
[0015] The second curved section connects to the lower edge of the two transition sections and joins with the first curved section to form the opening of the bag body.
[0016] In some embodiments, the first curved portion is disposed on the top edge of the bag and curves inward toward the inside of the bag.
[0017] In some embodiments, the first curved portion is disposed on the top edge of the bag and bends outward toward the bag body.
[0018] In some embodiments, the second curved portion bends inward toward the inside of the bag.
[0019] In some embodiments, the second curved portion bends outward from the bag body.
[0020] In some embodiments, the bag body has evenly distributed creases.
[0021] In some embodiments, the surface of the easy-tear sheet is provided with a serrated pattern.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] 1. The colorless portable food insulation cover of this utility model can be opened by pulling the easy-tear tab and then put down on the food. The elastic body will automatically tighten to effectively keep the food warm. It is simple to operate, efficient, time-saving, labor-intensive, and low-cost. It is not limited by space, location, or bowl size. It can keep a single food item warm, is easy to carry, and effectively meets the usage requirements.
[0024] 2. The composite layer material structure adopted in this utility model, especially the innermost polyethylene layer, forms a water vapor barrier layer, which effectively prevents high-temperature water vapor from contacting the metal aluminum layer and causing the aluminum layer to peel off and fade into food. This solves the problem that traditional PET aluminized film will peel off and fade when exposed to high-temperature water vapor, thus eliminating food safety hazards.
[0025] 3. The bag design of this utility model is reasonable. Through the evenly distributed fold design, the heat preservation cover can be folded and stored when not in use, which takes up little space and is easy to carry, thus solving the problem of inconvenient storage of traditional heat preservation covers.
[0026] 4. This utility model improves ease of use by providing an easy-tear tab at the opening of the bag and having a serrated surface on the easy-tear tab, making it easier for users to open the insulation cover. Attached image description:
[0027] Figure 1 This is a schematic diagram of one embodiment of the colorfast portable food insulation cover of this utility model.
[0028] Figure 2 This is a schematic diagram of one embodiment of the composite layer material in this utility model.
[0029] Figure 3 This is a schematic diagram of the product structure in an embodiment of this utility model;
[0030] Figure 4 This is a schematic diagram of the product structure in an embodiment of this utility model;
[0031] Figure 5 This is a schematic diagram of the product structure in an embodiment of this utility model;
[0032] Figure 6 This is a schematic diagram of the product structure in an embodiment of this utility model. Detailed implementation method:
[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. The following embodiments and drawings are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. The drawings only schematically show the parts related to the technical solution of this application, and do not represent their actual structure as a product.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0038] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0040] As people's living standards improve, the demand for food insulation is also increasing. Maintaining the temperature of food is an important issue when dining out, having picnics, or having family gatherings. Currently, common food insulation devices on the market mainly include insulated boxes, insulated bags, and insulated covers.
[0041] Insulated bags, as a common insulation device, have been widely used in many fields. Food needs to be kept warm after it is cooked and served, but if it is not eaten in time. At present, the preservation of food or leftovers is basically accomplished by wrapping it with plastic wrap. This can meet certain usage requirements by using traditional folding insulated food covers, but it also has significant drawbacks. Due to size limitations, it cannot keep a single food item warm, it is not easy to carry, and it is inconvenient to store and takes up space. On the other hand, aluminum-plated insulated food covers solve some of the shortcomings of traditional folding insulated food covers, but there is a problem that the aluminum plating layer will peel off and fade when exposed to high temperature water vapor, posing a food safety hazard.
[0042] See Figure 1 This utility model discloses a colorfast portable food insulation cover, which includes a bag body 1 made of composite layer material and having an opening 5. The bag body 1 is folded at the opening 5 to form a folded edge 3. An elastic body 2 for tightening the opening 5 is heat-sealed inside the folded edge 3 of the bag body 1. An even number of easy-tear tabs 4 are evenly arranged around the opening 5 of the bag body 1.
[0043] In some possible embodiments, the composite layer material has at least three layers. Specifically, in this embodiment, see [link to relevant documentation]. Figure 2 The composite layer material consists of three layers, from the inside out: a polyethylene layer 13, an aluminum layer 12, and a polyethylene terephthalate layer 11. During preparation, the polyethylene terephthalate layer 11 and the aluminum layer 12 are bonded together using a direct plating method, and then coated with the polyethylene layer 13 via a casting process to form the bag body 1. The polyethylene layer 13 has a thickness of 0.003-0.01 mm, the aluminum layer 12 has a thickness of 0.002-0.005 mm, and the polyethylene terephthalate layer 11 has a thickness of 0.004-0.01 mm. This three-layer structure design gives the heat insulation cover excellent heat preservation performance and durability. The inner polyethylene layer 13 has good food contact safety, the middle aluminum layer 12 provides heat insulation function, and the outer polyethylene terephthalate layer 11 provides wear resistance and anti-fading properties. The innermost polyethylene layer 13 forms a water vapor barrier layer, which effectively prevents high-temperature water vapor from contacting the aluminum layer and causing the aluminum layer to peel off and fade into the food, thus causing food safety problems.
[0044] In some possible embodiments, the bag body 1 includes a top 101, a first curved portion 102, a transition portion 103, and a second curved portion 104. The first curved portion 102 is symmetrically arranged along the front and rear edges of the top 101. The transition portion 103 is symmetrically arranged along the left and right edges of the bag body 1 and connects to the first curved portion 102. The second curved portion 104 connects to the lower edges of the two transition portions 103 and connects to the first curved portion 102 to form the opening 5 of the bag body 1. To adapt to different insulation conditions, the present invention provides the following implementation examples illustrating the structure and shape of the first curved portion 102 and the second curved portion 104.
[0045] In some embodiments, the first curved portion 102 is disposed on the edge of the bag top 101 and bends inward toward the bag body 1 to form a concave arc-shaped structure. This design allows the heat insulation cover to better fit the edge of the container when it is closed. The second curved portion 104 bends inward toward the bag body 1, forming a coordinated inward curved structure with the first curved portion 102, thereby enhancing the sealing performance of the heat insulation cover.
[0046] In some possible embodiments, the first curved portion 102 is arranged on the edge of the bag top 101 and bends outward toward the bag body 1 to form an outwardly convex arc structure. This design allows the heat insulation cover to provide a larger coverage area when covering larger food containers. Similarly, the second curved portion 104 bends outward toward the bag body 1 to form a coordinated outwardly curved structure with the first curved portion 102, enhancing the adaptability of the heat insulation cover.
[0047] In some possible embodiments, the first curved portion 102 is arranged on the edge of the bag top 101 and bends inward toward the bag body 1 to form a concave arc structure, and the second curved portion 104 bends outward toward the bag body 1 to form a structure combining inward and outward bending. This design allows the heat preservation cover to better adapt to the irregularly shaped container edges when covering food containers.
[0048] In some possible embodiments, the first curved portion 102 is arranged on the edge of the bag top 101 and bends outward from the bag body 1, while the second curved portion 104 bends inward from the bag body 1, forming a structure combining outward and inward bending. This design allows the heat insulation cover to better adapt to the edges of square or rectangular food containers when covering them.
[0049] In some embodiments, the bag body 1 has evenly distributed creases 105. In this embodiment, a distribution pattern of the creases 105 is provided, see [link to relevant documentation]. Figure 6 These creases 105 are evenly distributed on the bag body 1. These creases 105 are arranged horizontally, vertically or obliquely, which enhances the applicability and portability of the product. Moreover, the creases 105 facilitate the condensation of high-temperature water vapor on the inner wall of the bag body 1.
[0050] In some possible embodiments, other crease distributions 105 are also provided, such as creases 105 extending radially outward from the center of the bag body 1, so that the insulation cover can be stretched and adjusted according to food containers of different shapes and sizes, enhancing the applicability and portability of the product. The crease spacing 105 is 5-10mm and the crease depth 105 is 0.001-0.005mm. This design ensures sufficient stretchability without affecting the overall strength of the material.
[0051] In this embodiment, a crease distribution pattern 105 is provided. These creases 105 are distributed in a grid pattern, which allows the heat preservation cover to better adapt to square or rectangular food containers. The spacing between the creases 105 is 7 mm and the depth of the creases 105 is 0.003 mm. This design not only ensures sufficient elasticity but also enhances the adaptability to square containers and facilitates the condensation of water vapor into water droplets at high temperatures.
[0052] In some other possible embodiments, these creases 105 are distributed in a grid pattern, which allows the insulation cover to adapt more flexibly to food containers of different shapes, ensuring sufficient elasticity without affecting the overall strength of the material.
[0053] In some possible embodiments, these creases 105 are distributed concentrically, extending outward from the center of the bag body 1, allowing the insulation cover to better adapt to round food containers. The spacing of the creases 105 gradually increases from the center outward, with 6 mm in the central area and 10 mm at the edge area, and the depth of the creases 105 is 0.002 mm. This design ensures both sufficient flexibility and enhanced adaptability to round containers.
[0054] In some possible embodiments, the surface of the easy-tear sheet 4 is provided with serrated patterns, the height of which is 0.3-0.8 mm, the width of which is 0.2-0.5 mm, and the spacing between the serrations is 1-2 mm.
[0055] This serrated design increases the friction of the tear strip 4, making it easier for users to grip and pull, facilitating the opening and closing of the insulation cover. The tear strip 4 is made of the same composite layer material as the bag body 1, but its increased thickness enhances its durability.
[0056] In some embodiments, the easy-tear tabs 4 are evenly distributed around the opening 5 of the bag body 1, such as in this embodiment, where a total of 2 sets are provided.
[0057] In some other possible embodiments, the easy-tear tabs 4 are provided in 4 sets, each set being 90 degrees apart, which facilitates multiple people to keep the food warm when it is in a large container, ensures that the force is evenly distributed at the opening 5, and makes the operation convenient.
[0058] In some other possible embodiments, the easy-tear tabs 4 are evenly distributed around the opening 5 of the bag body 1, with a total of 10 sets, each set spaced 36 degrees apart, to ensure that the force at the opening 5 is more even, which is suitable for frequent opening and closing scenarios.
[0059] In some possible embodiments, the folded edge 3 is formed by folding inward at the opening 5 of the bag body 1, with a fold width of 10-15 mm. An elastomer 2 is heat-sealed inside the folded edge 3. The elastomer 2 is made of natural rubber material with a tensile strength of not less than 15 MPa and an elongation at break of not less than 600%. The cross-sectional shape of the elastomer 2 is circular with a diameter of 2-3 mm, and the circumference of the ring is 10%-15% smaller than the circumference of the opening 5 of the bag body 1. This design allows the elastomer 2 to effectively tighten the opening 5 of the bag body 1 without putting excessive pressure on the food container. The elastomer 2 is fixed inside the folded edge 3 by a heat-sealing process. The heat-sealing temperature is controlled at 120-150℃, and the heat-sealing time is 1-3 seconds to ensure a firm bond between the elastomer 2 and the folded edge 3.
[0060] In some possible embodiments, the folded edge 3 is formed by folding outwards at the opening 5 of the bag body 1, with a fold width of 10-15 mm. An elastomer 2 is heat-sealed within the folded edge 3. The elastomer 2 is made of thermoplastic elastomer material with a tensile strength of not less than 20 MPa and an elongation at break of not less than 550%. The elastomer 2 has a D-shaped cross-section, with a planar portion width of 3 mm and an arc portion height of 2.5 mm. Its annular circumference is 15% smaller than the circumference of the opening 5 of the bag body 1. This design allows the elastomer 2 to provide a more uniform tightening force while reducing pressure concentration at the container edge. The elastomer 2 is fixed within the folded edge 3 by a heat-sealing process. The heat-sealing temperature is controlled at 145°C, and the heat-sealing time is 2.8 seconds, ensuring a firm bond between the elastomer 2 and the folded edge 3.
[0061] The specific embodiments disclosed in this utility model fall within the protection scope of the claims of this utility model and are specific subordinate implementations of the feature parts of this utility model. The protection content of the specific embodiments is merely an explanation of the protection scope of the claims of this utility model. The protection scope of this utility model is not limited to the protection content of the specific embodiments, and the protection content of the specific embodiments should not be construed as a limitation on the protection scope of the claims of this utility model.
Claims
1. A non-fading portable food warmer cover, characterized by: The bag includes a bag body made of composite layer material and having an opening, the bag body being folded at the opening to form a folded edge, an elastic body for tightening the opening being heat-sealed inside the folded edge of the bag body, and an even number of easy-tear tabs being evenly arranged around the circumference of the opening of the bag body.
2. The colorfast portable food insulation cover according to claim 1, characterized in that: The composite layer material has no fewer than three layers.
3. The colorfast portable food insulation cover according to claim 2, characterized in that: The composite layer material consists of a polyethylene layer, an aluminum layer, and a polyethylene terephthalate layer from the inside out. The polyethylene layer 13 has a thickness of 0.003-0.01 mm, the aluminum layer 12 has a thickness of 0.002-0.005 mm, and the polyethylene terephthalate layer 11 has a thickness of 0.004-0.01 mm.
4. The colorfast portable food insulation cover according to claim 1, characterized in that: The bag body includes: Top of the bag; The first curved section is symmetrically arranged along the front and rear edges of the bag. The transition section is symmetrically arranged along the left and right edges of the bag body and connected to the first curved section; The second curved section connects to the lower edge of the two transition sections and joins with the first curved section to form the opening of the bag body.
5. The colorfast portable food insulation cover according to claim 4, characterized in that: The first curved portion is arranged on the top edge of the bag and curves inward toward the inside of the bag.
6. The colorfast portable food insulation cover according to claim 4, characterized in that: The first curved portion is arranged on the top edge of the bag and curves outward from the bag body.
7. The colorfast portable food insulation cover according to claim 4, characterized in that: The second curved portion bends inward toward the inside of the bag.
8. The colorfast portable food insulation cover according to claim 4, characterized in that: The second curved portion bends outward from the bag body.
9. A colorfast portable food insulation cover according to claim 4, characterized in that: The bag has evenly distributed creases.
10. A colorfast portable food insulation cover according to claim 1, characterized in that: The surface of the easy-tear sheet is provided with serrated patterns, the height of which is 0.3-0.8mm, the width of which is 0.2-0.5mm, and the spacing between the serrations is 1-2mm.