TWM619693U - Composite sheet and food container - Google Patents

Abstract

A composite sheet is provided and the composite sheet is suitable for applying in food containers. The composite sheet includes 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, wherein the first barrier- material layer is suitable as the inner side of the food container, and the second barrier-material layer is suitable as the outer side 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 material layer faces the first barrier-material layer, and the printed layer faces the second barrier-material layer. A food container using the composite sheet is also provided, and the food container has better appearance quality and food safety.

Description

Composite sheet and food container

This creation is about a composite sheet structure, especially a composite sheet structure applied to food containers.

As people’s pace of life accelerates and the number of people eating out increases, fast-food packaged foods have emerged to provide people with channels for quick access to food. Most of the well-known instant packaged foods, such as bowled instant noodles, cupped instant noodles, or cup soup, have mostly bowl-shaped or cup-shaped food containers. A traditional food container is made by foaming and molding of styrofoam material, but the styrofoam material may release toxins after being heated. Therefore, another food container made of paper has become a consumer's favorite. Another option.

Since the paper will absorb water and become soft after being soaked in water, it is necessary to coat a waterproof layer on the inside of the container when it is applied to the container, so that the paper container will not soften for a long time after it is filled with liquid food. Furthermore, the aesthetics of the printing on the surface of the food container is also one of the indicators that attract consumers to buy. How to make the food container have the functions of waterproof and oil-proof under the design of the printed pattern, and avoid direct contact of the printing ink with the oral cavity, It is a technical issue that the relevant industry must continue to think about.

The invention provides a composite sheet and a food container using the composite sheet. The composite sheet has water-proof, oil-proof and heat-sealable properties, and the food container has better appearance quality and food safety.

The composite sheet provided by this creation is suitable for use in food containers. The composite sheet includes: 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 the inner side of the food container, and the second barrier material layer is suitable for the outer side of the food container; the paper layer and the printing layer are laminated on Between the first barrier material layer and the second barrier material layer, the paper material layer faces the first barrier material layer, and the printed layer faces the second barrier material layer.

In an embodiment of the present creation, the materials of the first barrier material layer and the second barrier material layer are selected from the group consisting of polyolefin (Polyolefin) water-based resin, vinyl acetate (Ethylene vinyl acetate) resin, and water-based wax (Wax base emulsion). ), one or a combination of acrylic acid resin, polyurethane resin, and polyvinyl alcohol aqueous resin.

In an embodiment of the present invention, the materials of the above-mentioned first barrier material layer and the second barrier material layer are used in combination with an inorganic substance.

In an embodiment of the present invention, the above-mentioned first barrier material layer and the second barrier material layer may use different materials respectively.

In an embodiment of the present invention, the coating amount of the above-mentioned first barrier material layer and the second barrier material layer is between 3 g/m ² and 30 g/m ² .

In an embodiment of the present invention, the above-mentioned first barrier material layer and second barrier material layer serve as a water- and oil-proof layer or a water- and oil-proof and heat-sealable layer.

In an embodiment of the present invention, the basis weight of the aforementioned paper layer is between 20 g/m ² and 600 g/m ² .

In an embodiment of the present creation, the thickness of the aforementioned paper layer is between 0.06 mm and 60 mm.

In an embodiment of the present invention, the above-mentioned paper material layer is selected from one of white kraft paper, white card and kraft paper.

In an embodiment of the present creation, the formation of the above-mentioned printing layer is selected from one of ultraviolet printing, gravure printing, and water-based flexographic printing.

The food container provided by this creation includes a bottom and a cylindrical side wall. The cylindrical side wall is ringed on the periphery of the bottom to form a top opening, and the cylindrical side wall is composed of composite sheets.

In an embodiment of the present invention, the above-mentioned bottom part is composed of a composite sheet, and the bottom part and the cylindrical side wall are integrally formed.

In an embodiment of this creation, the above-mentioned bottom is composed of a composite sheet. The bottom includes a flat plate part and a bending part. The bending part is arranged downward along the periphery of the flat plate part. After the bottom is attached, the bottom edge of the cylindrical side wall is folded inward to cover the bent part.

In an embodiment of the present invention, the food container further includes a sealing film covering the top opening, and the sealing film is composed of a composite sheet, and the first barrier material layer of the composite sheet is adapted to face the bottom.

The composite sheet of this creation is composed of a first barrier material layer, a paper material layer, a printing layer, and a second barrier material layer in order. The first barrier material layer and the second barrier material layer are waterproof, oil-proof and waterproof The characteristics of heat sealing. Therefore, the food container formed by the composite sheet can improve the protection of the food, prevent the moisture and oil vapor of the food from being exposed, have a better appearance quality, and the printing ink will not directly contact the oral cavity when the food is stored. food safety.

In order to make the above-mentioned and other purposes, features and advantages of this creation more obvious and understandable, the following examples are specially cited, in conjunction with the accompanying drawings, which are described in detail as follows.

Figure 1 is a schematic cross-sectional view of the structure of a composite sheet according to an embodiment of the invention. As shown in Figure 1, the 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 arranged at intervals, and the paper layer 14 and the printing layer 16 are laminated between the first barrier material layer 12 and the second barrier material layer 18, wherein the paper material layer 14 faces the first barrier material layer. A barrier material layer 12, and the printed layer 16 faces the second barrier material layer 18. That is to say, the composite sheet 10 of this creative embodiment is composed of a first barrier material layer 12, a paper material layer 14, a printing layer 16, and a second barrier material layer 18 laminated in order.

The first barrier material layer 12 and the second barrier material layer 18 can use the same or different materials, and the first barrier material layer 12 and the second barrier material layer 18 use non-plastic coatings. In one embodiment, the materials of the first barrier material layer 12 and the second barrier material layer 18 are selected from polyolefin (POE) water-based resins, vinyl acetate acrylic resins (EVA), water-based waxes, water-based acrylic resins, One or a combination of 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 can be used in combination with the above-mentioned materials and inorganic substances, such as clay. Through the selection of materials, the first barrier material layer 12 and the second barrier material layer 18 can be used as a water- and oil-proof layer or a water- and oil-proof and heat-sealable layer.

Following the above description, the paper layer 14 is selected from one of white kraft paper, white card and kraft paper. The basis weight of the paper layer 14 is between 20 g/m ² and 600 g/m ² , and the thickness of the paper layer 14 is between 0.06 Between millimeters (mm) and 60 millimeters. In one embodiment, during the production of the composite sheet 10, one surface of the paper layer 14 can be pre-coated with a non-plastic material to form the first barrier material layer 12; A printing layer 16 is formed on one side of the material layer 12. The printing layer 16 is formed on the paper layer 14 by, for example, ultraviolet printing, gravure printing, or water-based flexographic printing; after that, a non-plastic material is coated on the surface of the printing layer 14 (Supplied as the second barrier material layer 18), and then heat and pressure seal the whole to form the composite sheet 10. In one embodiment, the coating of the non-plastic material is carried out by roll coating, and the total coating amount of the first barrier material layer 12 and the second barrier material layer 18 is between 3 g/m ² and 30 g/m Between ^2.

In another embodiment, when the composite sheet 10 is produced, the paper layer 14 may not be pre-formed with the first barrier material layer 12. After the printing layer 16 is formed on the paper layer 14, the paper The other side of the layer 14 away from the printing layer 16 is coated with a non-plastic material (used as the second barrier material layer 18 and the first barrier material layer 12 respectively), and then the whole is heat-press sealed to form the composite sheet 10.

2 is a schematic cross-sectional view of the structure of the food container according to the first embodiment of the present invention. As shown in FIG. 2, the food container 20 includes a bottom 22 and a cylindrical side wall 24. The cylindrical side wall 24 is arranged around the periphery of the bottom 22. To form the top opening 26, the bottom 22 and the cylindrical side wall 24 are composed of the above-mentioned composite sheet 10 (indicated in FIG. 1), wherein the first barrier material layer 12 is suitable as the inner side of the food container 20, and the second barrier material layer 18 is suitable as the outer side of the food container 20. Specifically, the bottom 22 includes a flat portion 221 and a bending portion 222. The bending portion 222 is surrounded downward along the periphery of the flat portion 221. As shown in FIG. 2, the cross-sectional view of the bottom 22 is slightly inverted U shape The cylindrical side wall 24 is formed by folding the bottom edge of the cylindrical side wall 24 to cover the bent portion 222 after the composite sheet 10 is attached around the bottom 22.

FIG. 3 is a schematic cross-sectional view of the structure of a food container according to a second embodiment of the invention. As shown in FIG. (Marked in Figure 1) In addition to the structure, the bottom 22A of the food container 20A can also be composed of the composite sheet 10, and the bottom 22A and the cylindrical side wall 24 are integrally formed, wherein the first barrier material layer 12 is suitable for the food container 20A On the inner side, the second barrier material layer 18 is suitable as the outer side of the food container 20A.

Moreover, in another embodiment of the present invention, by appropriately adjusting the thickness of each layer of the first barrier material layer 12, the paper layer 14, the printing layer 16, and the second barrier material layer 18, the composite sheet 10 can be used as a Sealing film. 4 is a schematic cross-sectional view of the structure of a food container according to an embodiment of the invention. As shown in FIG. 4, the food container 20B further includes a sealing film 28, which is composed of a composite sheet 10 (marked in FIG. 1), and The sealing film 28 is disposed on the top edge of the cylindrical side wall 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 this creative embodiment, the composite sheet is used as the side wall or bottom of the food container, and the first barrier material layer and the second barrier material layer have excellent water vapor barrier properties and oil vapor barrier properties, so that when food is stored in the food container, It can improve the protection of food, prevent the moisture and oil gas of the food from being exposed, and has better appearance quality and food safety. On the other hand, the composite sheet is heat-sealable, so it can be used as a sealing film for food containers by hot pressing, which can further increase the application range of the composite sheet of this invention.

Although this creation has been disclosed in the above examples, it is not used to limit this creation. Those with ordinary knowledge in the technical field to which this creation belongs can make some changes and modifications without departing from the spirit and scope of this creation. Therefore, the scope of protection of this creation shall be subject to the scope of the attached patent application.

10: Composite sheet 12: The first barrier material layer 14: paper layer 16: printing layer 18: The second barrier material layer 20, 20A, 20B: food container 22, 22A: bottom 221: Flat part 222: Bending part 24: Cylindrical side wall 26: top opening 28: Sealing film

Figure 1 is a schematic cross-sectional view of the structure of a composite sheet according to an embodiment of the invention. Fig. 2 is a schematic cross-sectional view of the structure of a food container according to a first embodiment of the invention. Fig. 3 is a schematic cross-sectional view of the structure of a food container according to a second embodiment of the invention. Fig. 4 is a schematic cross-sectional view of the structure of a food container according to an embodiment of the invention.

10: Composite sheet

12: The first barrier material layer

14: paper layer

16: printing layer

18: The second barrier material layer

Claims (14)

A composite sheet suitable for use in food containers, the composite sheet comprising: A first barrier material layer and a second barrier material layer are arranged at intervals, the first barrier material layer is suitable for being an inner side of the food container, and the second barrier material layer is suitable for being an outer side of the food container; as well as A paper material layer and a printing layer are laminated between the first barrier material layer and the second barrier material layer, wherein the paper material layer faces the first barrier material layer, and the printing layer faces the second barrier material layer. The composite sheet according to claim 1, wherein the materials of the first barrier material layer and the second barrier material layer are selected from the group consisting of polyolefin water-based resins, vinyl acetate acrylic resins, water-based waxes, acrylic-containing water-based resins, and polyolefins. One or a combination of urethane resin and polyvinyl alcohol water-based resin. The composite sheet according to claim 2, wherein the materials of the first barrier material layer and the second barrier material layer are used in combination with an inorganic substance. The composite sheet according to claim 2, wherein the first barrier material layer and the second barrier material layer can use different materials, respectively. The composite sheet according to claim 1, wherein the coating amount of the first barrier material layer and the second barrier material layer is between 3 g/m ² and 30 g/m ² . The composite sheet according to claim 1, wherein the first barrier material layer and the second barrier material layer serve as a water- and oil-proof layer or a water- and oil-proof and heat-sealable layer. The composite sheet according to claim 1, wherein the basis weight of the paper layer is between 20 g/m ² and 600 g/m ² . The composite sheet according to claim 1, wherein the thickness of the paper layer is between 0.06 mm and 60 mm. The composite sheet according to claim 1, wherein the paper layer is selected from one of white kraft paper, white card and kraft paper. The composite sheet according to claim 1, wherein the formation of the printing layer is selected from one of ultraviolet printing, gravure printing, and water-based flexographic printing. A food container, including: A bottom; and A cylindrical side wall is arranged around the periphery of the bottom to form a top opening, and the cylindrical side wall is composed of the composite sheet according to any one of claims 1 to 10. The food container according to claim 11, wherein the bottom is composed of the composite sheet, and the bottom and the cylindrical side wall are integrally formed. The food container according to claim 11, wherein the bottom part is composed of the composite sheet, the bottom part includes a flat plate part and a bent part, and the bent part is arranged downwardly along the periphery of the flat plate part, and the The cylindrical side wall is formed by folding a bottom edge of the cylindrical side wall inwardly to cover the bent portion after the composite sheet is attached around the bottom. The food container according to claim 11, further comprising a sealing film covering the top opening, and the sealing film is composed of the composite sheet, and the first barrier material layer of the composite sheet is adapted to face the bottom.

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