Multi-layer composite paperboard for forming folding container

Abstract

The utility model discloses a multi-layer composite paperboard for forming a folding container. The multi-layer composite paperboard comprises an inner film layer and an outer film layer, wherein a heat-resistant waterproof coating is adopted for preventing liquid from permeating outwards; the inner base layer is used as a coating base material of the inner film layer; the shaping base layer is formed by foaming polyurethane laminates; and the outer base layer is used as a coating base layer of the shaping base layer. The inner film layer, the inner base layer, the shaping base layer and the outer base layer are sequentially compounded, the paperboard for forming the container through folding is subjected to hot pressing processing, the hardness of the surface is high, meanwhile, indentation thin ribs are formed, on the other hand, due to the elastic property after curing, under good support, compared with traditional corrugated paper, the corrugated paper has the advantages that the hardness is high, and the packaging effect is good. Better stability performance is realized.

Description

Technical Field

[0001] The utility model relates to the field of paperboard materials, in particular to a multi-layer composite paperboard used for folding container molding. Background Art

[0002] A cup is a special vessel for holding water. Its main function is to drink alcohol or tea. With the diversification of modern life forms, traditional three-dimensional cups take up a certain amount of space when carried outdoors. Therefore, current outdoor sports are popular with the intensiveness and portability of various products, which take up little space. At present, there are a series of folding cups or containers on the market. For example, telescopic folding containers generally use a silicone telescopic sleeve structure for folding, so their shapes are relatively simple. At present, portable paper cups on the market are generally envelope-type paper cups, and the structural form is still relatively simple and simple, which is not easy to attract some outdoor groups pursuing individuality. The inventor found that there are very few cups with different shapes formed by folding with a plane structure on the market. Through the creases of the plane, folding in a specific way can realize a variety of different three-dimensional shapes of cups or containers. The inventor found through actual operation that the container formed by embossing creases using traditional corrugated paper has certain deficiencies in forming stability (although corrugated paper is easy to form a press due to its porous structure, its porous material is easy to puncture the surface, and it is also easy to form new creases during multiple uses or folding, affecting use), and thermal insulation. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a multi-layer composite paperboard for folding container forming.

[0004] The technical solution adopted by the utility model to solve the above problems is: a multi-layer composite paperboard for forming a folding container, comprising:

[0005] Inner membrane layer: heat-resistant and waterproof coating is used to prevent liquid from penetrating outwards;

[0006] Inner base layer: used as the coating substrate for the inner film layer;

[0007] Shaping base: Made of foamed polyurethane laminate;

[0008] Outer base layer: It serves as the covering base layer for the shaping base layer.

[0009] The inner membrane layer, inner base layer, shaping base layer and outer base layer are compounded in sequence.

[0010] Preferably, the inner base layer and the outer base layer are made of paper made of bamboo fiber or wood fiber.

[0011] Preferably, the outer base layer is provided with a PLA coating.

[0012] Preferably, the inner base layer is a water-based acrylic coating.

[0013] Preferably, a magnetic rubber layer is provided on the outer layer or the inner layer of the shaping base layer.

[0014] Compared with the prior art, the utility model has the following advantages and effects: the paperboard folded to form a container involved in the product has a high surface hardness through hot pressing, and the indented thin ribs formed at the same time have good support due to the elastic properties after curing, and have better stability performance than traditional corrugated paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 3 It is a structural schematic diagram of an embodiment of the utility model.

[0018] Figure numbers: inner film layer 101, inner base layer 102, shaping base layer 103, magnetic rubber layer 104, outer base layer 105, PLA coating 106, hot pressing plate 107, rib 1087, sub-strip 109. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0020] See also Figure 1-Figure 3 The present embodiment provides a multi-layer composite paperboard for forming a foldable container, characterized by comprising:

[0021] Inner membrane layer 101: adopts heat-resistant and waterproof coating to prevent liquid from penetrating outwards;

[0022] Inner base layer 102: serving as a coating substrate for the inner film layer 101;

[0023] The shaping base layer 103 is composed of a foamed polyurethane layer;

[0024] Outer base layer 105 : serves as a covering base layer for the shaping base layer 103 .

[0025] The inner film layer 101, the inner base layer 102, the shaping base layer 103 and the outer base layer 105 are compounded in sequence.

[0026] The present embodiment relates to a folding container for forming, which is based on the shortcomings of the folding container constructed by traditional corrugated paper. In the structure of the multi-layer composite paperboard, a shaping base layer 103 is provided. The special shaping base layer 103 is composed of a foamed polyurethane layer. When processing the multi-layer composite paperboard, it is necessary to perform indentation according to the paper cup structure to be formed. The indentation is performed by hot embossing to form folds. For the convenience of explanation, the present embodiment provides a simple structure of an indentation tool. The actual production tooling field personnel carry out industrial development based on the simple structure provided and the existing technology. The foamed polyurethane layer can be compressed and solidified during hot pressing, and the surface has a certain hardness and a certain elasticity. Therefore, two sets of upper and lower hot pressing plates 107 are designed in the indentation tool to perform hot pressing on the polyurethane layer to solidify its surface, thereby improving the support and hardness of the surface. At the same time, due to the low thermal conductivity of the polyurethane layer, it is not easy to get burned when held during use as a container / water cup, and it also has a certain thermal insulation performance. In this embodiment, Figure 2 As shown, in order to form creases / indentations for easy bending, a rib plate 1087 (as shown in the figure) with a composite indentation track that generates heat (actually, heat transfer can be achieved by laminating the hot pressing plates 107) is set on either of the two sets of hot pressing plates 107. At the same time, a cutting edge can be set on the ribs that need to be cut and separated for synchronous cutting, and the polyurethane layer is further hot-pressed (thinned) to form indentations / creases. The hot pressing process of this tooling is adapted to the multi-layer composite paperboard, and the formed paperboard that can be folded to form a container has a high surface hardness. At the same time, the formed indentation thin ribs have good support due to the elastic properties after curing. Compared with traditional corrugated paper, it has better stability. This embodiment provides an example of using Figure 2 The rib layout forms an indentation of a rectangular container to form a bend, which can form Figure 3 The container is in the form of a rectangular parallelepiped, and an additional sub-strip 109 is provided at the bottom for bending to perform hemming.

[0027] Specifically, in this embodiment, the inner base layer 102 and the outer base layer 105 are made of paper composed of bamboo fiber or wood fiber, the outer base layer 105 is provided with a PLA coating 106, and the inner base layer 102 is made of a water-based acrylic coating. The inner coating of the water-based acrylic emulsion coating can effectively prevent leakage and has excellent adhesion, heat resistance and medium resistance. Furthermore, the outer layer or the inner layer of the shaping base layer 103 is provided with a magnetic rubber layer 104. On the one hand, it can realize adaptive adsorption of the connecting edge to form a three-dimensional container, and on the other hand, it can adsorb customized magnetic decorations to enhance individuality.

[0028] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. A multi-layer composite paperboard for folding container forming, characterized in that: include: Inner membrane layer: heat-resistant and waterproof coating is used to prevent liquid from penetrating outwards; Inner base layer: used as the coating substrate for the inner film layer; Shaping base: Made of foamed polyurethane laminate; Outer base layer: as the covering base layer of the shaping base layer; The inner membrane layer, inner base layer, shaping base layer and outer base layer are compounded in sequence.

2. The multi-layer composite paperboard for folding container forming according to claim 1, characterized in that: The inner base layer and the outer base layer are made of paper made of bamboo fiber or wood fiber.

3. The multi-layer composite paperboard for folding container forming according to claim 1, characterized in that: The outer base layer is provided with a PLA coating.

4. The multi-layer composite paperboard for folding container forming according to claim 1, characterized in that: The inner base layer adopts water-based acrylic coating.

5. The multi-layer composite paperboard for folding container forming according to claim 1, characterized in that: The outer layer or the inner layer of the shaping base layer is provided with a magnetic rubber layer.

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