Packaging sheet and food container
By bonding the high-temperature resistant PET heat seal film layer to the paper substrate to form a packaging sheet suitable for high-temperature environment, the problem of existing packaging materials not resistant to high temperature during heating is solved, and the food container is realized in the microwave oven or The effect of safe use in the oven.
Patent Information
- Application Number
- CN202421336258.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-12
AI Technical Summary
Existing pre-made dishes packaging and packed lunch boxes are not resistant to high temperatures during heating, and may decompose toxic and harmful substances, and cannot be used safely in microwave ovens or ovens.
A high temperature-resistant PET heat seal film layer is bonded to the paper substrate to form a packaging sheet with good high temperature resistance and is used to manufacture food containers. The packaging sheet will not decompose toxic substances during heating and is suitable for use in high-temperature environments such as microwave ovens and ovens.
It realizes the safe use of food containers in high temperature environments, avoids the decomposition of toxic substances, and meets environmentally friendly, convenient, safe and reliable packaging requirements.
Smart Images
Figure CN222523255U_ABST
Abstract
Description
[Technical field]
[0001] The utility model relates to the technical field of packaging materials, in particular to a packaging sheet and a food container. [Background technology]
[0002] Existing pre-prepared food packaging and take-away boxes are all made of aluminum or plastic boxes, but aluminum foil cannot be heated in a microwave oven, and plastic boxes cannot be baked in an oven. In the context of de-aluminization and de-plasticization, a green and environmentally friendly packaging material is needed to replace it. To this end, we need to develop a food container that can be directly placed in a microwave oven or oven for heating, and can withstand high temperatures during the heating process, will not decompose toxic and harmful substances, and is environmentally friendly, convenient, safe, and reliable.
[0003] In view of the above problems, the applicant has proposed a solution. [Contents of the utility model]
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a packaging sheet and a food container, and the technical solution adopted is:
[0005] A packaging sheet comprises a paper substrate, and a PET heat-sealing film layer is bonded to one side surface of the paper substrate.
[0006] According to a packaging sheet material of an embodiment of the utility model, an adhesive layer is provided between the paper substrate and the PET heat-sealing film layer.
[0007] According to a packaging sheet of an embodiment of the utility model, a printing layer or a printed cold stamping layer or a printed laser transfer layer is provided on one side surface of the paper substrate.
[0008] According to a packaging sheet of an embodiment of the utility model, the melting point of the PET heat-sealing film layer is 240-260° C., and the heat-sealing strength is not less than 2.5N.
[0009] According to a packaging sheet material of an embodiment of the utility model, a light-blocking PE layer is provided between the adhesive layer and the PET heat-sealing film layer, and the light transmittance of the light-blocking PE layer is lower than 30%.
[0010] According to a packaging sheet of an embodiment of the utility model, a high barrier layer is provided between the adhesive layer and the PET heat-sealing film layer, and the high barrier layer is a PA layer, an aluminum oxide PET layer and / or a silicon oxide PET layer; an adhesive layer is provided between the high barrier layer and the PET heat-sealing film layer.
[0011] According to a packaging sheet of an embodiment of the utility model, the printing layer or offset cold stamping layer or printed laser transfer layer is made by any one of offset printing, gravure printing, flexographic printing, silk screen printing, printed cold stamping and laser cold transfer, as well as a combination of multiple printing processes.
[0012] According to a packaging sheet material of an embodiment of the utility model, the material for making the adhesive layer includes any one or any combination of PE or glue.
[0013] According to a packaging sheet of an embodiment of the utility model, the weight of the paper substrate is 100-450g, and the thickness is 120-700μm; the weight of the adhesive layer is 10-40g, and the thickness is 10-40μm; the weight of the PET heat-sealing film layer is 7-40g, and the thickness is 5-28μm.
[0014] A food container comprises any one of the packaging sheets described above.
[0015] A food container according to an embodiment of the utility model is a food cup body, comprising a bottom plate portion and cup side walls, wherein the cup side walls are connected by folded edges or cut surfaces.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] The utility model bonds a high-temperature resistant PET heat-sealing film to a paper substrate, so that the packaging sheet has better high-temperature resistance. The utility model provides a food container, which is made of the above packaging sheet. Therefore, the food container also has high-temperature resistance and will not decompose toxic and harmful substances during the heating process. The food container can be used as a food packaging food container and can be directly placed in a microwave oven, an oven and an air fryer for heating. The utility model is environmentally friendly, convenient, safe and reliable.
Brief Description of the Drawings
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 Schematic diagram of food container and enlarged diagram of packaging sheet structure according to some embodiments of the utility model;
[0020] Figure 2 The packaging sheet structure described in the embodiment of the utility model Figure 1 ;
[0021] Figure 3 The packaging sheet structure described in the embodiment of the utility model Figure 2 .
[0022] Description of main component symbols:
[0023] 10. Paper substrate; 20. PET heat-sealing film layer; 30. Adhesive layer; 40. Light-blocking PE layer; 50. High barrier layer; 60. Adhesive layer; 70. Printing layer. [Specific implementation method]
[0024] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.
[0025] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present utility model, and is only provided for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.
[0026] The "connection" described in the specification and the mutual "connection" relationship of the components shown in the drawings can be understood as a fixed connection or a detachable connection or an integral connection; it can be a direct connection or a connection through an intermediate medium. Ordinary technicians in this field can understand the connection relationship according to the specific circumstances and can derive different implementation methods in an appropriate manner such as screwing, riveting, welding, clamping or embedding.
[0027] With respect to the directional words such as up, down, left, right, top, bottom, etc. described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" may mean directly above or obliquely above, or it simply means higher than other objects; other directions may be understood by analogy.
[0028] The materials for making parts with solid shapes shown in the specification and the drawings may be metal materials, non-metal materials or other synthetic materials; the mechanical processing techniques used for parts with solid shapes may be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precisions, but are not limited to the above-mentioned materials and manufacturing processes.
[0029] The utility model provides a packaging sheet, such as Figure 1 , 2 As shown in 3, it includes a paper substrate 10, and a PET heat-sealing film layer 20 is bonded to one side surface of the paper substrate 10. The melting point of the PET heat-sealing film layer 20 is 240-260°C, and the heat-sealing strength is not less than 2.5N.
[0030] The utility model bonds a high temperature resistant PET heat sealing film to a paper substrate so that the packaging sheet has better high temperature resistance. The utility model also provides a food container, such as Figure 1As shown, the food container is made of the above-mentioned packaging sheet, so it also has high temperature resistance, and will not decompose toxic and harmful substances during the heating process. It can be used as a food packaging food container and can be directly placed in a microwave oven or oven for heating, which is environmentally friendly, convenient, safe and reliable.
[0031] In some embodiments of the present invention, the packaging sheet is folded and bonded at the junction of the rolled pieces, or at the junction of two adjacent packaging sheets, or is cut and bonded.
[0032] In some embodiments of the present invention, Figure 1 , 2 As shown in FIG. 3 , a bonding material layer 30 is provided between the paper substrate 10 and the PET heat-sealing film layer 20 , and the bonding material layer 30 is made of any one or any combination of PE or glue.
[0033] In some embodiments of the present invention, Figure 2 , 3 As shown, a printing layer 70 or a printed cold stamping layer or a printed laser transfer layer is provided on one side of the paper substrate 10, and the printing layer 70 or the offset cold stamping layer or the printed laser transfer layer is made by any one of offset printing, gravure printing, flexographic printing, silk screen printing, printed cold stamping and laser cold transfer, as well as a combination of various printing processes.
[0034] In the utility model, the weight of the paper substrate is 100-450 g, and its thickness is 120-700 μm; the weight of the adhesive layer is 10-40 g, and its thickness is 10-40 μm; the weight of the PET heat-sealing film layer is 7-40 g, and its thickness is 5-28 μm.
[0035] The thickness ratio of the paper substrate 10, the adhesive layer 30, and the PET heat-sealing film layer 20 is 120-700:10-40:5-28.
[0036] Some food containers have requirements for light blocking, such as some food containers for packaging meat, eggs and milk, which need to block light to reduce the invasion of ultraviolet rays in the food. In some embodiments of the present invention, Figure 2 As shown, the packaging sheet includes a paper substrate 10, a PE light-blocking layer 40 is bonded to the paper substrate 10 through a bonding material layer 30, and a PET heat-sealing film 20 is bonded to the PE light-blocking layer 40 through glue. The light transmittance of the light-blocking PE layer 40 is less than 30%, which can provide good light-blocking performance, avoid the oxidation damage caused by light to food, and avoid the damage caused by high temperature and bacteria to food. The thickness ratio of the paper substrate 10, the bonding material layer 30, the PE light-blocking layer 40, and the PET heat-sealing film layer 20 is 120-700:10-40:10-40:5-28.
[0037] Some food containers have high barrier requirements, such as meat, poultry, dairy products, jams, condiments and other food packaging, which need to effectively block the penetration of oxygen, water vapor, odor and other substances, so as to protect the product, extend the shelf life, keep the food fresh and flavor, etc. In some embodiments of the utility model, such as Figure 3 As shown, the packaging sheet includes a paper substrate 10, on which a high barrier layer 50 is bonded through a bonding material layer 30, and the high barrier layer 50 is a PA layer, an aluminum oxide PET layer and / or a silicon oxide PET layer, and a PET heat-sealing film layer 20 is bonded to the high barrier layer 50 through an adhesive layer 60. The thickness ratio of the paper substrate 10, the bonding material layer 30, the high barrier layer 50, and the PET heat-sealing film layer 20 is 120-700:10-40:10-15:5-28.
[0038] Although the utility model is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications can be made to the utility model without departing from the principle and spirit of the utility model defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the utility model, but the scope of protection is limited by the content of the claims.
Claims
1. A packaging sheet, characterized in that: The invention comprises a paper substrate (10), wherein a PET heat-sealing film layer (20) is bonded to one side surface of the paper substrate (10); an adhesive layer (30) is provided between the paper substrate (10) and the PET heat-sealing film layer (20); a printing layer (70) or a printed cold stamping layer or a printed laser transfer layer is provided on one side surface of the paper substrate (10); the melting point of the PET heat-sealing film layer (20) is 240 to 260° C., and the heat-sealing strength is not less than 2.5N. A light-blocking PE layer (40) is provided between the adhesive layer (30) and the PET heat-sealing film layer (20), and the light transmittance of the light-blocking PE layer (40) is less than 30%; a high-barrier layer (50) is provided between the adhesive layer (30) and the PET heat-sealing film layer (20), and an adhesive layer (60) is provided between the high-barrier layer (50) and the PET heat-sealing film layer (20), and the high-barrier layer (50) includes a PA layer, an aluminum oxide PET layer or a silicon oxide PET layer.
2. A packaging sheet according to claim 1, characterized in that: The weight of the paper substrate (10) is 100-450 g, and its thickness is 120-700 μm; the weight of the adhesive layer (30) is 10-40 g, and its thickness is 10-40 μm; the weight of the PET heat-sealing film layer (20) is 7-40 g, and its thickness is 5-28 μm.
3. A food container, characterized in that: The invention comprises the packaging sheet according to any one of claims 1 to 2.
4. A food container according to claim 3, characterized in that: The packaging sheets are folded and bonded at the joints of the wrapping sheets or at the joints of two adjacent packaging sheets, or are cut and bonded.