CN215477021U - Composite sheet and food container - Google Patents
Composite sheet and food container Download PDFInfo
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- CN215477021U CN215477021U CN202121818477.2U CN202121818477U CN215477021U CN 215477021 U CN215477021 U CN 215477021U CN 202121818477 U CN202121818477 U CN 202121818477U CN 215477021 U CN215477021 U CN 215477021U
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Abstract
A composite sheet suitable for use in a food container includes a first barrier material layer, a paper layer, a print layer, and a second barrier material layer. The first barrier material layer and the second barrier material layer are arranged at intervals, the first barrier material layer is suitable for being used as the inner side face of the food container, and the second barrier material layer is suitable for being used as the outer side face of the food container; the paper layer and the printing layer are laminated between the first barrier material layer and the second barrier material layer, wherein the paper layer faces the first barrier material layer, and the printing layer faces the second barrier material layer. A food container using the composite sheet is also provided, which has better appearance quality and food safety.
Description
Technical Field
The utility model relates to a structure of a composite sheet, in particular to a structure of a composite sheet applied to a food container.
Background
With the pace of people's life accelerating and the increase of the population of the foreign food, the fast food packaged food is produced accordingly, providing a pipeline for people to get food quickly. Generally known fast food packages such as instant noodles in bowls, instant noodles in cups, instant soup in cups, etc. generally have a bowl-shaped or cup-shaped food container. One conventional food container is made of a styrofoam material, but the styrofoam material may release toxins when heated, and therefore, another food container made of paper is an alternative choice for consumers.
Because paper materials absorb water and become soft after being soaked in water, when the paper materials are applied to containers, a waterproof layer is coated on the inner side of the container, so that the paper containers can be kept for a long time without softening after containing liquid food. Moreover, the aesthetic property of the printed surface of the food container is also one of the indexes attracting consumers to purchase, and how to make the food container have the functions of water and oil resistance under the design of printed patterns, and to avoid the direct contact of the printed ink with the oral cavity is a technical subject that the related industry needs to continuously make an effort.
SUMMERY OF THE UTILITY MODEL
The utility model provides a composite sheet and a food container using the same, wherein the composite sheet has water resistance, oil resistance and heat sealability, and the food container has better appearance quality and food safety.
The composite sheet provided by the utility model is suitable for being applied to food containers, and comprises the following components: the paper comprises a first barrier material layer, a paper layer, a printing layer and a second barrier material layer. The first barrier material layer and the second barrier material layer are arranged at intervals, the first barrier material layer is suitable for being used as the inner side face of the food container, and the second barrier material layer is suitable for being used as the outer side face of the food container; the paper layer and the printing layer are laminated between the first barrier material layer and the second barrier material layer, wherein the paper layer faces the first barrier material layer, and the printing layer faces the second barrier material layer.
In an embodiment of the utility model, a material of the first barrier material layer and the second barrier material layer is selected from one or a combination of a Polyolefin (polyofin) water-based resin, a vinyl acetate acrylate (Ethylene vinyl acetate) resin, a Wax base emulsion (Wax base emulsion), an Acrylic acid-containing water-based resin (Acrylic acid resin), a Polyurethane (Polyurethane) resin, and a Polyvinyl alcohol (Polyvinyl alcohol) water-based resin.
In an embodiment of the utility model, the material of the first barrier material layer and the material of the second barrier material layer are further combined with an inorganic substance.
In an embodiment of the utility model, the first barrier material layer and the second barrier material layer may be made of different materials.
In an embodiment of the utility model, the coating weight of the first barrier material layer and the second barrier material layer is between 3g/m2To 30g/m2In the meantime.
In an embodiment of the utility model, the first barrier material layer and the second barrier material layer are used as a waterproof and oil-proof layer or a waterproof and oil-proof heat-sealable layer.
In an embodiment of the utility model, the basis weight of the paper layer is between 20g/m2To 600g/m2In the meantime.
In an embodiment of the utility model, the thickness of the paper layer is between 0.06 mm and 60 mm.
In an embodiment of the utility model, the paper layer is selected from one of white kraft paper, white cardboard and kraft paper.
In an embodiment of the utility model, the printing layer is formed by one selected from uv printing, gravure printing and aqueous flexographic printing.
The food container provided by the utility model comprises a bottom and a cylindrical side wall. The cylindrical side wall is arranged around the periphery of the bottom to form a top opening, and the cylindrical side wall is made of a composite sheet material.
In an embodiment of the utility model, the bottom is made of a composite sheet material, and the bottom and the cylindrical sidewall are integrally formed.
In an embodiment of the utility model, the bottom is made of a composite sheet, the bottom includes a flat plate portion and a bent portion, the bent portion is disposed downward along a periphery of the flat plate portion, and the cylindrical sidewall is formed by inwardly folding a bottom edge of the cylindrical sidewall to cover the bent portion after the composite sheet is attached around the bottom.
In one embodiment of the present invention, the food container further comprises a sealing film covering the top opening, and the sealing film is made of a composite sheet material, and the first barrier material layer of the composite sheet material is adapted to face the bottom.
The composite sheet is formed by sequentially laminating a first barrier material layer, a paper layer, a printing layer and a second barrier material layer, wherein the first barrier material layer and the second barrier material layer have the characteristics of water resistance, oil resistance and heat sealing. When the food container formed by the composite sheet is used for preserving food, the protection of the food can be improved, moisture and oil gas of the food are prevented from being exposed, the appearance quality is better, the printing ink cannot be directly contacted with the oral cavity, and the food safety is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic cross-sectional view of the structure of a composite sheet according to an embodiment of the present invention.
Fig. 2 is a schematic sectional view showing the structure of a food container according to a first embodiment of the present invention.
Fig. 3 is a schematic sectional view showing the structure of a food container according to a second embodiment of the present invention.
Fig. 4 is a schematic sectional view showing the structure of a food container according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic cross-sectional view of a composite sheet according to an embodiment of the present invention, and as shown in fig. 1, a composite sheet 10 includes a first barrier material layer 12, a paper layer 14, a printing layer 16, and a second barrier material layer 18. The first barrier material layer 12 and the second barrier material layer 18 are disposed at intervals, and the paper layer 14 and the printed layer 16 are laminated between the first barrier material layer 12 and the second barrier material layer 18, wherein the paper layer 14 faces the first barrier material layer 12, and the printed layer 16 faces the second barrier material layer 18. That is, the composite sheet 10 according to the embodiment of the present invention is formed by sequentially laminating the first barrier material layer 12, the paper layer 14, the printing layer 16, and the second barrier material layer 18.
The first barrier material layer 12 and the second barrier material layer 18 may be made of the same or different materials, and the first barrier material layer 12 and the second barrier material layer 18 may be made of non-plastic coating. In one embodiment, the material of the first barrier material layer 12 and the second barrier material layer 18 is selected from one or a combination of Polyolefin (POE) water-based resin, vinyl acetate acrylic resin (EVA), water-based wax, acrylic water-based resin, polyurethane resin (PU), and polyvinyl alcohol (PVA) water-based resin. In one embodiment, the first barrier material layer 12 and the second barrier material layer 18 may be further formed by combining the above materials with an inorganic material, such as clay. By selecting the materials, the first barrier material layer 12 and the second barrier material layer 18 can be used as a waterproof and oilproof layer or a waterproof and oilproof heat-sealing layer.
Continuing from the above description, the paper layer 14 is selected from one of white kraft paper, white cardboard and kraft paper, and the basis weight of the paper layer 14 is 20g/m2To 600g/m2The thickness of paper layer 14 is between 0.06 millimeters (mm) and 60 mm. In one embodiment, when the composite sheet 10 is manufactured, a surface of the paper layer 14 may be coated with a non-plastic material in advance to form the first barrier material layer 12; next, a printing layer 16 is formed on the paper material layer 14 on the side away from the first barrier material layer 12, and the printing layer 16 is formed on the paper material layer 14 by, for example, ultraviolet printing, gravure printing, aqueous flexographic printing, or the like; thereafter, a non-plastic material (for use as the second barrier material layer 18) is surface-coated on the printed layer 14, and then the whole is heat-press sealed to constitute the composite sheet 10. In one embodiment, the coating of the non-plastic material is performed by roll coating, and the first barrier material layer 12 and the second barrier material layer are formed by roll coatingThe total coating weight of the barrier material layer 18 is between 3g/m2To 30g/m2In the meantime.
In another embodiment, the composite sheet 10 is manufactured by coating a non-plastic material (for use as the second barrier material layer 18 and the first barrier material layer 12, respectively) on the printing layer 16 and the other side of the paper layer 14 away from the printing layer 16 after the printing layer 16 is formed on the paper layer 14 without forming the first barrier material layer 12 on the paper layer 14, and then performing a heat press sealing on the whole to form the composite sheet 10.
Fig. 2 is a schematic cross-sectional view of the structure of a food container according to a first embodiment of the present invention, and as shown in fig. 2, the food container 20 includes a bottom 22 and a cylindrical sidewall 24, the cylindrical sidewall 24 is disposed around the periphery of the bottom 22 to form a top opening 26, the bottom 22 and the cylindrical sidewall 24 are made of the composite sheet 10 (shown in fig. 1), wherein the first barrier material layer 12 is adapted to serve as an inner side surface of the food container 20, and the second barrier material layer 18 is adapted to serve as an outer side surface of the food container 20. Specifically, the bottom portion 22 includes a flat plate portion 221 and a bent portion 222, and the bent portion 222 is disposed along the periphery of the flat plate portion 221 and is downward surrounded, as shown in fig. 2, so that the cross-sectional view of the bottom portion 22 is schematically and slightly in an inverted U shape; the cylindrical side wall 24 is formed by fitting the composite sheet 10 around the bottom 22 and then folding the bottom edge of the cylindrical side wall 24 inward to cover the bent portion 222.
Fig. 3 is a schematic cross-sectional view of the structure of a food container according to a second embodiment of the present invention, and as shown in fig. 3, a food container 20A includes a bottom portion 22A and a cylindrical sidewall 24, wherein, in addition to the cylindrical sidewall 24 being formed of the composite sheet 10 (shown in fig. 1), the bottom portion 22A of the food container 20A may also be formed of the composite sheet 10, and the bottom portion 22A and the cylindrical sidewall 24 are integrally formed, wherein the first barrier material layer 12 is suitable for being an inner side surface of the food container 20A, and the second barrier material layer 18 is suitable for being an outer side surface of the food container 20A.
In another embodiment of the present invention, the composite sheet 10 can be used as a sealing film by properly adjusting the thickness of each of the first barrier material layer 12, the paper layer 14, the printing layer 16 and the second barrier material layer 18. Fig. 4 is a schematic cross-sectional view of the structure of a food container according to an embodiment of the present invention, as shown in fig. 4, the food container 20B further includes a sealing film 28, the sealing film 28 is made of the composite sheet 10 (shown in fig. 1), and the sealing film 28 is disposed on the top edge of the cylindrical sidewall 24 in a hot-pressing manner to cover the top opening 26 of the food container 20B, wherein the first barrier material layer 12 of the composite sheet 10 is adapted to face the bottom 22.
In the embodiment of the utility model, the composite sheet is used as the side wall or the bottom of the food container, and the moisture barrier property and the oil-gas barrier property of the first barrier material layer and the second barrier material layer are excellent, so that when food is stored in the food container, the protection property of the food can be improved, the moisture and the oil-gas of the food are prevented from being exposed, and the food container has better appearance quality and food safety. On the other hand, the composite sheet has heat-sealing property, so that the composite sheet can be used as a sealing film of a food container by hot pressing, and the application range of the composite sheet can be further increased.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (14)
1. A composite sheet suitable for use in a food container, the composite sheet comprising:
the first barrier material layer and the second barrier material layer are arranged at intervals, the first barrier material layer is suitable for being used as an inner side face of the food container, and the second barrier material layer is suitable for being used as an outer side face of the food container; and
a paper layer and a printing layer are laminated between the first barrier material layer and the second barrier material layer, wherein the paper layer faces the first barrier material layer, and the printing layer faces the second barrier material layer.
2. The composite sheet according to claim 1, wherein the material of the first barrier material layer and the second barrier material layer is selected from one or a combination of polyolefin water-based resin, vinyl acetate acrylic resin, water-based wax, acrylic water-based resin, polyurethane resin, and polyvinyl alcohol water-based resin.
3. The composite sheet of claim 2, wherein the material of the first and second barrier layers is further compounded with an inorganic.
4. The composite sheet of claim 2, wherein the first and second barrier material layers are each made of a different material.
5. The composite sheet of claim 1, wherein the first barrier material layer and the second barrier material layer are coated at a weight of between 3g/m2 and 30g/m 2.
6. The composite sheet material of claim 1, wherein the first barrier material layer and the second barrier material layer act as a water and oil repellent layer or a water and oil repellent heat sealable layer.
7. The composite sheet material of claim 1 wherein the paper layer has a basis weight of between 20g/m2 and 600g/m 2.
8. The composite sheet material of claim 1 wherein the paper layer has a thickness of between 0.06 mm and 60 mm.
9. The composite sheet according to claim 1, wherein the paper layer is selected from one of white kraft paper, white cardboard and kraft paper.
10. The composite sheet of claim 1, wherein the print layer is formed by one selected from the group consisting of uv printing, gravure printing, and aqueous flexographic printing.
11. A food container, comprising:
a bottom portion; and
a cylindrical side wall disposed around a periphery of the bottom to form a top opening, the cylindrical side wall being formed from the composite sheet material of any one of claims 1 to 10.
12. The food container of claim 11 wherein the bottom is formed from the composite sheet material and the bottom and the cylindrical sidewall are integrally formed.
13. The food container of claim 11 wherein the bottom portion is formed from the composite sheet material, the bottom portion includes a flat portion and a bent portion, the bent portion is downwardly disposed around the periphery of the flat portion, and the cylindrical sidewall is formed by folding a bottom edge of the cylindrical sidewall inwardly to cover the bent portion after the composite sheet material is attached around the bottom portion.
14. The food container of claim 11, further comprising a sealing film covering the top opening, wherein the sealing film is formed of the composite sheet material, and wherein the first barrier material layer of the composite sheet material is adapted to face the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121818477.2U CN215477021U (en) | 2021-08-05 | 2021-08-05 | Composite sheet and food container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121818477.2U CN215477021U (en) | 2021-08-05 | 2021-08-05 | Composite sheet and food container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215477021U true CN215477021U (en) | 2022-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121818477.2U Active CN215477021U (en) | 2021-08-05 | 2021-08-05 | Composite sheet and food container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215477021U (en) |
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2021
- 2021-08-05 CN CN202121818477.2U patent/CN215477021U/en active Active
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