TWI592343B - Insulation and environmental meal boxes - Google Patents

Description

Insulation and environmental protection lunch box

The invention relates to a lunch box, in particular to an insulated and environmentally friendly lunch box.

With the development of economic construction, people's life rhythm is getting faster and faster, fast food has been widely accepted, and the use of disposable fast food packaging boxes is increasing. At present, the disposable food box on the market has two kinds of plastic and paper;

Disposable lunch boxes made of plastic are mainly PP polypropylene and PS polystyrene. They are non-toxic, tasteless and odorless. PP is soft. Generally, the PP temperature is -6 degrees to +120 degrees, so it is especially suitable. Hot rice hot dishes can be heated in a microwave oven or even cooked in a steam cabinet. The modified PP can be used at temperatures ranging from -18 degrees to +110 degrees. The lunch box made of this PP can be heated until 100 degrees use, it can be put into the refrigerator for cold storage, has the advantage of low price, but it is easy to be reused, and can not be naturally degraded, causing serious pollution to the ecological environment, and this pollution has long-term effects and is difficult to eliminate. It has become a serious problem in China's environmental protection.

At the same time, the existing paper fast food box is made of 300-350 grams of bleached sulphate wood pulp paperboard, which is made by die-cutting or die-cutting, setting and other processes through a stamping forming process similar to enamel processing. High, and affected by the structure, low strength, easy to bend, deform or even break during use, and does not have heat preservation function, so it is inconvenient to use.

The technical problem to be solved by the invention is to provide an insulated and environmentally friendly lunch box with high structural strength and good thermal insulation effect.

In order to solve the above technical problem, the present invention provides a heat-insulating and environmentally-friendly lunch box, comprising a box body, wherein the box body is formed with an opening chamber having an opening upward, and the edge of the box body is rotatably provided with a cover capable of covering the receiving chamber a side wall of the cover body is provided with a buckle, a side wall of the box body is provided with a card slot corresponding to the buckle, and the box body and the cover body are made of lunch box paper, the meal The box paper is formed by stacking a first paperboard layer, a corrugated paper and a second paperboard layer, the surface of the second paperboard layer is provided with a first waterproof layer, and the first waterproof layer is located at an inner surface of the receiving cavity and Describe the lower surface of the cover.

Further, the first paperboard layer and/or the second paperboard layer is a cup paper.

Further, the waterproof layer is a PE coating layer.

Further, the box body and the cover body are bent from the same lunch box paper.

Further, the connection between the box body and the cover body is provided with a fold.

Further, the corrugated paper is F-type corrugated paper.

Further, a surface of the first paperboard layer is provided with a second waterproof layer.

Further, the second waterproof layer is a PE coating layer.

The invention has the advantages that the heat preservation and environmental protection lunch box of the invention has high structural strength, is not easy to be deformed and damaged during use, has good heat insulation function, can heat the internal food, and is environmentally friendly and easily degraded.

Embodiment 1 Referring to FIG. 1 , FIG. 2 and FIG. 4 , the present invention provides an insulated and environmentally-friendly lunch box, comprising a box body 1 . The housing 1 is formed with an opening chamber 11 having an opening upward, and is rotatably disposed at an edge of the box body 1 . There is a cover body 2 capable of covering the accommodating cavity, and a buckle 21 is disposed on the side wall of the cover body 2, and correspondingly, a card slot 12 corresponding to the buckle 21 is disposed on the side wall of the case body 1 when the cover body is closed When the buckle can be snapped into the card slot, the case 1 and the cover 2 in the present application are made of lunch box paper, which is composed of the first paperboard layer 31, the corrugated cardboard 32 and the second cardboard layer 33. The first waterproof layer 34 is disposed on the inner surface of the accommodating cavity and the lower surface of the cover body, that is, on the inner surface of the lunch box; In the example, the first paperboard layer 31 and/or the second paperboard layer 33 are made of food grade paper; preferably, the first paperboard layer 31 and the second paperboard layer 33 are both food grade cup paper, and the first The waterproof layer 34 is a PE coating layer, and the corrugated paper 32 is made of F-shaped corrugated paper; in this embodiment, the box body 1 and the lid body 2 are bent from the same lunch box paper, and the rectangular shape is The lunch box paper is bent into the first part and the second part, and then the edge of the first part is bent toward the side of the waterproof layer to form a cover body, and the edge of the second part is bent toward the side of the waterproof layer to form a box. At the same time, at high temperature, the PE coating layer melts and has viscosity, and the bent portion is bonded to form a whole to complete the processing; in order to improve the overall strength, the ribs are folded on the box body and the cover body. At the same time, a crease is provided at the joint of the casing 1 and the lid 2. In this embodiment, the meal box paper is a single-sided film, and the film layer is located on the inner surface of the lunch box.

Embodiment 2, referring to FIG. 1 , FIG. 3 and FIG. 4 , in this embodiment, the lunch box paper adopts a double-sided coating film, that is, the inner surface and the outer surface of the lunch box are both waterproof coating layers; The meal box paper in the example is formed by sequentially stacking the first paperboard layer 31, the corrugated paper 32 and the second paperboard layer 33, while the first waterproof layer 34 is provided on the surface of the second paperboard layer 33, in the first paperboard layer 31. The surface is provided with a second waterproof layer 35, that is, the lunch box paper is sequentially formed by superposing the second waterproof layer 35, the first cardboard layer 31, the corrugated cardboard 32, the second cardboard layer 33 and the first waterproof layer 34, and therefore, the meal is The inner and outer surfaces of the lunch box made of the box paper have a waterproof layer; in this embodiment, the first paperboard layer 31 and/or the second paperboard layer 33 are made of food grade paper; preferably, the first paperboard layer 31 and The second paperboard layer 33 is made of food grade paper, while the first waterproof layer 34 and the second waterproof layer 35 are PE coating layers, and the corrugated paper 32 is made of F-shaped corrugated paper.

The following production process of the lunch box is briefly described;

A. Cutting a single-layer coated lunch box paper or a double-layer coated lunch box paper into a lunch box paper embryo by using a mold, and having a box body and a lid on the paper embryo;

B, feeding into the steam chamber, so that the surface of the paper box embryo adsorbs steam and softens;

C. taking out the paper box embryo and folding it into a box body and a cover body. When the lunch box paper is a single layer of coated paper, the film layer is placed on the inner surface of the lunch box;

D. Hot press forming with a mold, since the PE coating layer is viscous after being melted by heat, it acts as an adhesive during hot pressing; when hot pressing, a reinforcing surface of the concave or convex body is pressed on the casing or the cover to Improve the structural strength of the lunch box;

E. After the hot pressing is completed, take out and cool, and finally check the shape and surface humidity of the lunch box to judge whether it is qualified.

The heat preservation and environmental protection lunch box of the invention has high structural strength, is not easy to be deformed and damaged during use, has good heat insulation function, can heat the internal food; and is environmentally friendly and easily degraded.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and retouchings without departing from the technical principles of the present invention. It should also be considered as the scope of protection of the present invention.

1‧‧‧Box
11‧‧‧ accommodating chamber
12‧‧‧ card slot
2‧‧‧ cover
21‧‧‧ buckle
31‧‧‧First cardboard layer
32‧‧‧Corrugated paper
33‧‧‧Second board layer
34‧‧‧First waterproof layer
35‧‧‧Second waterproof layer

[Fig. 1] Fig. 1 is a schematic structural view of an insulated and environmentally friendly lunch box of the present invention. 2 is a schematic structural view of a first embodiment of a lunch box paper of the heat-insulating and environmentally-friendly lunch box of the present invention. [Fig. 3] Fig. 3 is a schematic structural view of a second embodiment of a lunch box paper of the heat-insulating and environmentally-friendly lunch box of the present invention. [Fig. 4] is a schematic view showing the development of the heat preservation and environmental protection lunch box of the present invention.

31‧‧‧First cardboard layer

32‧‧‧Corrugated paper

33‧‧‧Second board layer

34‧‧‧First waterproof layer

35‧‧‧Second waterproof layer

Claims (8)

The invention relates to a heat-insulating and environmentally-friendly lunch box, comprising: a box body, wherein the box body is formed with an opening-up receiving cavity, and the box body is rotatably provided with a cover body capable of covering the receiving cavity, the cover a side wall of the body is provided with a buckle, a side wall of the box body is provided with a card slot corresponding to the buckle, the box body and the cover body are made of lunch box paper, and the lunch box paper is first The paperboard layer, the corrugated paper and the second paperboard layer are sequentially stacked, and the surface of the second paperboard layer is provided with a first waterproof layer, the first waterproof layer being located under the inner surface of the receiving cavity and the cover surface. The heat-insulating and environmentally-friendly lunch box of claim 1, wherein the first paperboard layer and/or the second paperboard layer is a cup paper. The heat-insulating and environmentally-friendly lunch box according to the first aspect of the invention, wherein the first waterproof layer is a PE coating layer. The heat-insulating and environmentally-friendly lunch box according to claim 1, wherein the box body and the cover body are formed by bending the same lunch box paper. The heat-insulating and environmentally-friendly lunch box according to the first aspect of the invention, wherein the connection between the box body and the cover body is provided with a crease. In the heat-insulating and environmentally-friendly lunch box according to Item 1, the corrugated paper is F-type corrugated paper. The heat-insulating and environmentally-friendly lunch box according to the first aspect of the invention, wherein the surface of the first paperboard layer is provided with a second waterproof layer. In the heat-insulating and environmentally-friendly lunch box according to Item 7, the second waterproof layer is a PE coating layer.