KR20230133800A - Multi-Layer Composite Packaging Box Liners - Google Patents

Abstract

The present invention aims to provide a multi-layer complex packaging box liner, which comprises: an upper-layer cardboard, a few middle-layer cardboards, and a lower-layer cardboard. In accordance with the shape of a product, the upper-layer cardboard is cut into a first sheet and a first adhesion reinforcing unit for supporting the product. In accordance with the shape of a product, the few middle-layer cardboards are cut into a few second sheets for supporting the product. In accordance with the shape of a product, the lower-layer cardboard is cut into a third sheet and a third adhesion reinforcing unit for supporting the product. The first sheet, the few second sheets, and the third sheet jointly form a storage chamber for supporting the product. According to the present invention, the product storage chamber forms a semi-sealed structure to be more beautiful than a semi-hollow storage chamber. By using the die cutting-thermal compression two-step method, the multi-layer cardboard is made complex directly for manufacturing a liner box. Therefore, the actual method includes only two steps to be very simple and efficient. The method is simpler than the whole forming method, and required human labor and physical resources can be reduced. By using the multi-layer cardboard complex method, the stability of the liner box can be more excellent and pressure resistance and vibration resistance can be more superb.

Description

Multi-Layer Composite Packaging Box Liners

The present invention relates to the field of packaging box technology, and more specifically to a multi-layer composite packaging box liner.

In recent years, plastics have been widely used in people's daily lives. According to statistics, the world's plastic production capacity in 2018 is 360 million tons, an increase of more than 20 times from 1964 to now, and by 2035. Global plastic production is expected to increase by another twofold in 2018. According to statistics, the major production centers of world plastics have already moved from developed countries such as Europe and the United States to Asia. Disposable plastic products have a large usage volume, low recycling rate, and cause serious pollution to the marine environment. They cause irreparable damage to the ecological environment and also cause serious harm to human health. Therefore, it has received widespread attention from the international community, and control of plastic pollution has also formed a universal consensus in the international community. Under such circumstances, the development of substitute products such as degradable plastics has become a new technological challenge. For example, replacing plastic products with paper or using degradable plastics has all become a new development trend.

In the prior art, current liner boxes are usually manufactured using an injection molding method, but the method described above is complicated and uses non-degradable plastic, and when using degradable plastic, the price is very high. ; It is possible to use an integrated folding liner, but the construction method is complicated, and the liner manufactured using the above method lacks stability, and not only does the folding process consume a relatively large amount of manpower and material resources, but the shape is also relatively uniform, making it difficult to type. There is a problem of not being able to satisfy the demand for liners with diverse and complex shapes. In addition, it is possible to manufacture the product storage chamber of a packaging box using a simple composite method, but the storage chamber as described above is usually hollow, which has problems with poor aesthetics and poor structural stability.

The purpose of the present invention is to provide a multi-layer composite packaging box liner. The construction method of the current integrally molded liner box is complicated, or the product storage chamber manufactured using a simple composite construction method is hollow, which adversely affects aesthetics. In order to solve the problem, we provide a method of manufacturing liner boxes by directly combining multi-layer cardboard using only the two-step die cutting-thermal pressure window method, but it is very simple and efficient, and provides a product storage chamber of the packaging box liner. Because it can form a semi-closed structure, it has the advantage of more aesthetics and superior structural stability compared to a semi-hollow storage chamber.

It is composed of an upper layer of cardboard, a few layers of middle layer of cardboard, and a lower layer of cardboard;

According to the shape of the product, the upper cardboard is cut into a first sheet and a first adhesive reinforcement to support the product;

According to the shape of the product, a few pieces of multilayer cardboard are cut into a second sheet between stations to support the product;

According to the shape of the product, the lower cardboard is cut into a third sheet and a third adhesive reinforcement to support the product;

The first sheet, some second sheets and third sheets jointly form a storage chamber that supports the product.

Preferably, the shapes and dimensions of the upper cardboard, the slightly middle layer cardboard, and the lower layer cardboard are all identical, thereby improving the overall strength of the packaging box liner.

Preferably, side plates are connected to all four circumferences of the upper cardboard, several layers of middle cardboard, and lower cardboard, so that they can be folded at any angle, but are usually perpendicular to the upper cardboard or lower cardboard.

Preferably, the first sheet and the upper cardboard are connected to each other at least on one side; The second sheet and the middle cardboard are connected to each other at least on one side, and the third sheet and the lower cardboard are connected to each other at least on one side.

Preferably, the first sheet and the third sheet are overlapped vertically to form the main body of the product storage chamber, and in the overlap method, the first sheet is positioned at the top and the third sheet is positioned at the bottom, or the third sheet is positioned at the top. A method is used in which the first sheet is positioned at the top and the first sheet is positioned at the bottom, or the first sheet and the third sheet are alternately positioned at the top.

Preferably, the second sheet is adhered to the first adhesive reinforcement portion and the third adhesive reinforcement portion, and the oblique periphery overlaps the first sheet and the third sheet to form a hollow supplementary surface of the storage chamber.

Preferably, the upper cardboard, middle cardboard, and lower cardboard are configured to further include positioning holes.

Preferably, the upper cardboard, middle cardboard, and lower cardboard are cardboard coated with polylactic acid, wherein the upper cardboard and lower cardboard are coated on one side, and the middle cardboard is coated on both sides.

Preferably, the thickness of the polylactic acid is 15 to 35 μm.

The manufacturing method of the multilayer composite packaging box liner includes the following steps.

A first step of carrying out die cutting initial processing on the upper layer cardboard, some middle layer cardboard and lower layer cardboard;

According to the shape of the product, precision die cutting is performed on the top layer cardboard, some middle layer cardboard, and bottom layer cardboard, cutting into the first sheet, first adhesive reinforcement, some second sheets, third sheets, and third adhesive reinforcement. and a second step of removing other excess parts; and,

The upper cardboard, some middle layer cardboard, and lower layer cardboard are arranged in order, combined according to the shape of the product and the positioning hole, and then pressed and molded using a press. The first sheet, some second sheets, and third sheets are used to form the product. The third step is to form a semi-airtight storage chamber and bond the cardboards together through polylactic acid coated thereon.

Preferably, the compression temperature of the compressor is 300 to 500°C, the compression pressure is 0.3T to 0.6T, and the compression time is 7 to 15 s.

1. Since the product storage chamber constructed in the present invention forms a semi-closed structure, it is more aesthetically pleasing compared to a semi-hollow storage chamber.

2. Since the present invention manufactures a liner box by directly combining multilayer cardboard using a two-step die cutting-thermal compression method, the actual method consists of only two steps, making it very simple and efficient, and compared to the integrated molding method. Not only is it simpler, but it also saves human and material resources.

3. Since the present invention uses a multi-layer cardboard composite method, not only is the stability of the liner box more excellent, but also the pressure resistance and vibration resistance performance can be improved.

4. Since the present invention uses eco-friendly paper (cardboard coated with polylactic acid) as a raw material, it meets the new standards of China's plastic restriction laws.

The drawings described below are provided to aid understanding of the present invention and constitute a part of the present application, and the exemplary embodiments of the present invention and their description are only for interpreting the present invention and do not limit the present invention. That's not what I want to do.
Figure 1 is an illustration of the three-dimensional structure of the multilayer composite packaging box liner of Example 1.
Figure 2 is a bird's eye view of the multilayer composite packaging box liner of Example 1.
Figure 3 is an exemplary view of the top layer of cardboard in Example 1.
Figure 4 is an exemplary view of the multilayer cardboard in Example 1.
Figure 5 is an exemplary view of the lower layer cardboard in Example 1.
The above description is only a summary of the technical solution of the present invention, and is provided so that the technical means of the present invention can be clearly understood and the present invention can be realized according to the contents of the specification. Referring to the accompanying drawings, the preferred embodiment of the present invention can be understood. The embodiment will be described in detail as follows. Specific implementation methods of the present invention will be explained in detail through the following examples and drawings.

Hereinafter, the present invention will be described in detail with reference to the attached drawings and examples.

Example 1

As shown in Figures 1 and 3 to 5, the multi-layer composite packaging box liner is comprised of an upper cardboard (1), a middle cardboard (2), and a lower cardboard (3), wherein the upper cardboard (1) , the middle layer cardboard (2) and the lower layer cardboard (3) are cardboard coated with polylactic acid, the thickness of the polylactic acid is 15 to 35 μm, the upper layer cardboard (1) and the lower layer cardboard (3) are coated on one side, and the middle layer cardboard (2) is coated on both sides; As shown in Figures 3 to 5, the dimensions and shapes of the upper cardboard 1, the middle cardboard 2, and the lower cardboard 3 are all identical, the solid lines in the drawings are cutting lines, and the dotted lines are folding lines. According to the shape of the product, the upper cardboard (1) is cut into a first sheet (11) and a first adhesive reinforcement portion (12) for supporting the product, and the first sheet (11) and the upper cardboard (1) are at least One side is connected to each other; According to the shape of the product, a portion of the multilayer cardboard 2 is cut into a few second sheets 21 for supporting the product, and the second sheet 21 and the intermediate cardboard 2 are connected to each other at least on one side; Depending on the shape of the product, the lower cardboard (3) is cut into a third sheet (31) and a third adhesive reinforcement portion (32) to support the product, and the third sheet (31) and the lower cardboard (3) are formed on at least one side. These are connected to each other; The first sheet 11, some second sheets 21 and third sheets 31 jointly form a semi-closed storage chamber 5 that supports the product. The first sheet 11 and the third sheet 31 are overlapped up and down to form the main body of the product storage chamber 5, and in the overlap method, the first sheet 11 and the third sheet 31 are alternately It uses an upper position method; The second sheet 21 is bonded to the first adhesive reinforcement portion 12 and the third adhesive reinforcement portion 32, and the four peripheries overlap the first sheet 11 and the third sheet 31, thereby forming a storage chamber. Forms the hollow supplementary surface 51 of (5). Side plates (4) are connected to all four circumferences of the upper cardboard (1), some middle cardboard (2), and lower cardboard (3), allowing folding at any angle, but usually the upper cardboard (1) or the lower layer. It is perpendicular to the cardboard (3).

The manufacturing method of the multi-layer composite packaging box liner includes the following steps.

A first step of performing initial die cutting processing on the upper cardboard (1), middle cardboard (2), and lower cardboard (3);

Precision die cutting is performed on the upper cardboard (1), middle cardboard (2), and lower cardboard (3) according to the shape of the product to form the first sheet 11, the first adhesive reinforcement portion 12, and the second sheet. (21), a second step of cutting into the third sheet 31 and the third adhesive reinforcement portion 32, and removing other excess parts; and,

The upper layer cardboard (1), some middle layer cardboard (2), and lower layer cardboard (3) are arranged in order, combined according to the shape of the product, and then pressed and molded using a press. The pressing temperature of the press is 400°C, The pressing pressure is 0.4T, and the pressing time is 10 s; The first sheet 11, the second sheet 21, and the third sheet 31 form a semi-closed storage chamber for the product, of which the first sheet 11 and the third sheet 31 are alternately It overlaps and is positioned above the furnace, and the second sheet 21 is bonded to the first adhesive reinforcement part 12 and the third adhesive reinforcement part 32, and the four peripheral areas are the first sheet 11 and the third sheet ( 31), forming a hollow supplementary surface 51 of the storage chamber 5; All cardboards are bonded through polylactic acid coated on them.

The above content is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious to those skilled in the art that the present invention can be modified and changed in various ways. All modifications, equivalent replacements and improvements without departing from the spirit and principles of the present invention are included in the protection scope of the present invention.

1: Upper layer carton
2:Middle layer cardboard
3: Lower layer cardboard
4: side plate
5: storage chamber
11: first sheet
12: first adhesive reinforcement portion
21: second sheet
31: 3rd sheet
32: second adhesive reinforcement portion
51: hollow supplementary side

Claims (10)

It is composed of an upper layer of cardboard, a few layers of middle layer of cardboard, and a lower layer of cardboard;
According to the shape of the product, the upper cardboard is cut into a first sheet and a first adhesive reinforcement portion to support the product;
According to the shape of the product, a few pieces of multilayer cardboard are cut into some second sheets to support the product;
According to the shape of the product, the lower cardboard is cut into a third sheet and a third adhesive reinforcement to support the product;
A multi-layer composite packaging box liner wherein the first sheet, some second sheets and a third sheet jointly form a storage chamber supporting the product. According to paragraph 1,
A multi-layer composite packaging box liner, characterized in that side plates are connected to all four peripheries of the upper cardboard, a few layers of middle layer cardboard, and the lower layer cardboard, and can be folded at any angle. According to paragraph 1,
The first sheet and the upper cardboard are connected to each other at least on one side; A multi-layer composite packaging box liner, wherein the second sheet and the middle layer cardboard are connected to each other at one side, and the third sheet and the lower layer cardboard are connected to each other at least one side. According to paragraph 1,
The first sheet and the third sheet are overlapped up and down to form the main body of the product storage chamber. In the overlap method, the first sheet is located at the top and the third sheet is located at the bottom, or the third sheet is located at the top, A multi-layer composite packaging box liner, characterized in that the first sheet is positioned at the bottom or the first sheet and the third sheet are alternately positioned at the top. According to paragraph 1,
The second sheet is bonded to the first adhesive reinforcement portion and the third adhesive reinforcement portion, and the four peripheries overlap with the first sheet and the third sheet to form a hollow supplementary surface of the storage chamber. Box liner. According to paragraph 1,
A multi-layer composite packaging box liner, characterized in that the upper layer cardboard, middle layer cardboard, and lower layer cardboard further include a positioning hole. According to paragraph 1,
The upper cardboard, middle cardboard, and lower cardboard are polylactic acid-coated cardboard, and the upper cardboard and lower cardboard are coated on one side, and the middle cardboard is coated on both sides. A multi-layer composite packaging box liner. In clause 7,
A multi-layer composite packaging box liner, characterized in that the thickness of the polylactic acid is 15 to 35 μm. A first step of carrying out die cutting initial processing on the upper layer cardboard, some middle layer cardboard and lower layer cardboard;
According to the shape of the product, precision die cutting is performed on the top layer cardboard, some middle layer cardboard, and bottom layer cardboard, cutting into the first sheet, first adhesive reinforcement, some second sheets, third sheets, and third adhesive reinforcement. and a second step of removing other excess parts; and,
The upper cardboard, some middle layer cardboard, and lower layer cardboard are arranged in order, combined according to the shape of the product and the positioning hole, and then pressed and molded using a press. The first sheet, some second sheets, and third sheets are used to form the product. A third step of forming a semi-closed storage chamber and bonding the cardboards together through polylactic acid coated thereon; A method for manufacturing a multi-layer composite packaging box liner according to any one of claims 1 to 8, comprising: According to clause 9,
A method of manufacturing a multi-layer composite packaging box liner, characterized in that the compression temperature of the compressor is 300 to 500 ℃, the compression pressure is 0.3T to 0.6T, and the compression time is 7 to 15 s.