A manufacturing method of a corrugated container columnar film

Abstract

The present application relates to a method for manufacturing a corrugated container column film, which includes fixing a first air valve film on a first container film; fixing a second container film on the first container film and the first air valve film to form an air passage extending along the first air valve film and container cavities arranged in sequence along the first air valve film; the input end of each one-way channel on the first air valve film is communicated with the air passage, the output end of each one-way channel is communicated with the corresponding container cavity, and deforming the part of the second container film belonging to each container cavity, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity, and the first air valve film is located between the first container film and the second container film. The air column bag made of the corrugated container column film manufactured by the method provided in the present application has a flat outer surface after being inflated, can provide a larger contact area, and can improve the bonding strength and stacking stability.

Description

Technical Field

[0001] This application relates to the technical field of packaging materials, and particularly to a manufacturing method for a corrugated container column film. Background Art

[0002] Air column bags are widely used in the packaging of products such as alcoholic beverages, electronic products, cosmetics, fruits, etc. At present, the inner and outer surfaces of the vast majority of air column bags are wavy structures. During the production process, the designated areas on two layers of container films are directly heat-sealed together. For example, in Korean Patent Application KR1020190105453 (Packaging Box Using an Airbag and Its Manufacturing Method), different parts are also melted and joined to form a bonding part, and then a wavy column is formed after inflation.

[0003] On the outer surface of the above-mentioned traditional wavy air column bags, labels cannot be pasted because the bonding area is small and it is easy to fall off during the logistics transfer process. Therefore, products packaged in such air column bags need to be additionally packaged with another layer, such as a cardboard box, when stacked. Because when directly stacked together, adjacent air column bags will slide relative to each other, resulting in unstable placement of the goods. Summary of the Invention

[0004] This application provides a manufacturing method for a corrugated container column film, which can produce a corrugated container column film with at least one surface being flat or approximately flat. For an air column bag made of such a corrugated container column film, by providing a flat outer surface to increase the contact area, the bonding strength and the stability during stacking can be improved.

[0005] The above object of this application is achieved through the following technical solutions:

[0006] In a first aspect, this application provides a manufacturing method for a corrugated container column film, including:

[0007] Fix a first air valve film on a first container film;

[0008] Fix a second container film on the first container film and the first air valve film to form an air duct extending along the first air valve film and container cavities arranged in sequence along the first air valve film; the input end of each one-way channel on the first air valve film is communicated with the air duct, and the output end of each one-way channel is communicated with the corresponding container cavity. The first air valve film is located between the first container film and the second container film; and

[0009] Deform the part of the second container film belonging to each container cavity so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to this container cavity is greater than the length of the first container film belonging to this container cavity.

[0010] In a possible implementation manner of the first aspect, deforming the part of the second container film belonging to each container cavity includes:

[0011] Adsorb the first container film on the flat surface of the upper suction mold;

[0012] Adsorb the second container film on the deformed surface of the lower suction mold, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity.

[0013] In a possible implementation of the first aspect, the thickness of the first container film is greater than the thickness of the second container film or the tensile strength of the first container film is greater than the tensile strength of the second container film.

[0014] In a second aspect, the present application provides a method for manufacturing a corrugated container column film, including:

[0015] Fix the first air valve film on the first container film;

[0016] Fix the second container film on the first container film and the first air valve film to form an air duct extending along the first air valve film and container cavities arranged in sequence along the first air valve film; the input end of each one-way channel on the first air valve film is communicated with the air duct, and the output end of each one-way channel of the first air valve film is communicated with the corresponding container cavity, and the first air valve film is located between the first container film and the second container film;

[0017] Deform the part of the second container film belonging to each container cavity, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity;

[0018] Fix the second air valve film on the third container film; and

[0019] Fix the second air valve film and the third container film on the second container film to form an air duct extending along the second air valve film and container cavities arranged in sequence along the second air valve film; the input end of each one-way channel on the second air valve film is communicated with the air duct, and the output end of each one-way channel is communicated with the corresponding container cavity, and the second air valve film is located between the second container film and the third container film.

[0020] In a possible implementation of the second aspect, deforming the part of the second container film belonging to each container cavity includes:

[0021] Adsorb the first container film on the flat surface of the upper suction mold;

[0022] Adsorb the second container film on the deformed surface of the lower suction mold, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity.

[0023] In a possible implementation of the second aspect, the thickness of the second container film is less than the thicknesses of the first container film and the third container film, or the tensile strength of the second container film is less than the tensile strengths of the first container film and the third container film.

[0024] In a third aspect, the present application provides a method for manufacturing a corrugated container column film, including:

[0025] Fixing the first air valve film on the first container film;

[0026] Fixing the second container film on the first container film and the first air valve film, and the output end of each one-way channel on the first air valve film communicates with the corresponding container cavity;

[0027] Deforming the part of the second container film belonging to each container cavity, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to this container cavity is greater than the length of the first container film belonging to this container cavity; obtaining a single-sided corrugated column film;

[0028] Fixing the second air valve film on the third container film; and

[0029] Fixing the second air valve film and the third container film on the single-sided corrugated column film to form an air duct extending along the second air valve film and container cavities arranged in sequence along the second air valve film;

[0030] The output end of each one-way channel of the second air valve film communicates with the corresponding container cavity, and the input end of each one-way channel communicates with the air duct; the second air valve film is located between the second container film and the third container film;

[0031] The input end of each one-way channel on the first air valve film communicates with the air duct.

[0032] In a possible implementation of the third aspect, deforming the part of the second container film belonging to each container cavity includes:

[0033] Using the flat surface on the upper suction mold to adsorb the first container film;

[0034] Using the deformation surface on the lower suction mold to adsorb the second container film, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to this container cavity is greater than the length of the first container film belonging to this container cavity.

[0035] In a possible implementation of the third aspect, the thickness of the second container film is less than the thicknesses of the first container film and the third container film, or the tensile strength of the second container film is less than the tensile strengths of the first container film and the third container film.

[0036] Generally speaking, for the method for manufacturing a corrugated container column film provided in this application, the air column bag made of the corrugated container column film produced has a flat outer surface after inflation, can provide a larger contact area, and can improve the bonding strength and the stability during stacking. Description of the Drawings

[0037] Figure 1 It is a flowchart of the steps of a method for manufacturing a corrugated container column film provided in this application.

[0038] Figure 2 It is a process flowchart of a method for manufacturing a corrugated container column film provided in this application.

[0039] Figure 3 It is a schematic diagram of the position of the heat seal line when the first container film and the first air valve film are heat-sealed.

[0040] Figure 4 It is a schematic diagram of the position of the heat seal line when the first container film, the first air valve film and the second container film are heat-sealed.

[0041] Figure 5 It is a schematic diagram of the position of the first air valve film.

[0042] Figure 6 It is a schematic diagram of the position of the air duct and the container cavity.

[0043] Figure 7 It is a schematic diagram of the principle when the container cavity is inflated.

[0044] Figure 8 It is a schematic diagram of the principle of airtightness after the container cavity is inflated.

[0045] Figure 9 It is a process schematic diagram when the second container film is deformed using a down-drawing mold.

[0046] Figure 10 Based on Figure 9 the given schematic diagram of the principle.

[0047] Figure 11 It is a flowchart of the steps of another method for manufacturing a corrugated container column film provided in this application.

[0048] Figure 12 Based on Figure 11 the given schematic diagram of the principle.

[0049] Figure 13 It is a schematic diagram where there are container cavities on both sides of the second container film.

[0050] Figure 14It is a schematic diagram of a corrugated container column film provided by this application. The thick line in the figure indicates the heat-sealing position.

[0051] Figure 15 It is a schematic diagram of another corrugated container column film provided by this application. The thick line in the figure indicates the heat-sealing position.

[0052] Figure 16 It is a schematic diagram of the position of a coating provided by this application.

[0053] Figure 17 It is a schematic diagram of the position of another coating provided by this application.

[0054] In the figure, 11 is the first container film, 12 is the second container film, 13 is the third container film, 21 is the first air valve film, 22 is the second air valve film, 31 is the air duct, 32 is the container cavity, and 4 is the coating. Detailed implementation manners

[0055] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0056] Please refer to Figure 1 and Figure 2 , which is the first manufacturing method of the corrugated container column film disclosed in this application, mainly including the following steps:

[0057] S101, fix the first air valve film 21 on the first container film 11;

[0058] S102, fix the second container film 12 on the first container film 11 and the first air valve film 21 to form an air duct 31 extending along the first air valve film 21 and container cavities 32 arranged in sequence along the first air valve film 21; the input end of each one-way channel on the first air valve film 21 communicates with the air duct 31, and the output end of each one-way channel communicates with the corresponding container cavity 32; and

[0059] S103, deform the part of the second container film 12 belonging to each container cavity 32 so that in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to this container cavity 32 is greater than the length of the first container film 11 belonging to this container cavity 32.

[0060] In step S101, the first air valve film 21 is fixed on the first container film 11 by heat-sealing. In Figure 2 , the first container film 11 and the first air valve film 21 simultaneously enter between the heat-sealing die Ⅰ and the lower template Ⅰ, and the heat-sealing die Ⅰ presses the first container film 11 and the first air valve film 21 on the lower template Ⅰ to heat-seal the two together.

[0061] It should be understood that both the first air valve film 21 and the first container film 11 are made of plastic. The two are pressed onto the first lower template using the first heat-sealing die. When the predetermined area on the first air valve film 21 or the predetermined area on the first container film 11 comes into contact with the high-temperature area on the first lower template, the first air valve film 21 and the first container film 11 will be bonded together.

[0062] It should also be understood that the bonding here refers to partial bonding rather than complete bonding together. From the perspective of the product, the area where the two films are bonded together is called the heat-sealing line, as Figure 3 shown by the dashed line in

[0063] The first air valve film 21 is located between the first container film 11 and the second container film 12; the first air valve film 21 consists of two layers of films, with multiple one-way channels evenly distributed at equal intervals. The first layer of the two layers of films is bonded to the first container film 11, and the second layer will be bonded to the second container film 12. This part will be specifically described in step S102.

[0064] In step S102, the second container film 12 is fixed onto the first container film 11 and the first air valve film 21. Here, the fixing is still carried out by heat-sealing. The second container film 12 will be bonded to the first container film 11 and the first air valve film 21, as Figure 4 shown. In this step, the second heat-sealing die and the second lower template are used. The working principles of the second heat-sealing die and the second lower template are the same as those of the first heat-sealing die and the first lower template, so they will not be elaborated here.

[0065] Please refer to Figure 5 and Figure 6 , at this time, an air passage 31 extending along the short side of the first air valve film 21 and container cavities 32 arranged in sequence along the long side of the first air valve film 21 will be formed between the first container film 11 and the second container film 12. The number of container cavities 32 is multiple, and at the same time, the width of the container cavities 32 also matches the spacing of the one-way channels on the first air valve film 21.

[0066] The input end of each one-way channel on the first air valve film 21 is in communication with the air passage 31, and the output end of each one-way channel is in communication with the corresponding container cavity 32. The number of one-way channels is the same as the number of container cavities 32. When the air passage 31 is inflated, the gas in the air passage 31 will flow into the container cavities 32 through the one-way channels on the first air valve film 21, causing the volume of the container cavities 32 to increase, as Figures 6 to 8 shown.

[0067] Please refer to Figure 9 and Figure 10, finally, step S103 is executed. In this step, the upper suction mold (providing a flat surface) is used to adsorb the first container film 11, and the lower suction mold (providing a wavy surface) is used to adsorb the second container film 12. After the adsorption deformation of the upper suction mold and the lower suction mold is completed, in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to the container cavity 32 is greater than the length of the first container film 11 belonging to the container cavity 32;

[0068] The function of the deformation is to make the first container film 11 a flat surface or an approximate flat surface after the container cavity 32 is inflated. It should be understood that the existing production technology uses the method of directly thermally bonding the first container film 11 and the second container film 12 together to manufacture the air duct 31 and the container cavity 32. During the inflation process, part of the first container film 11 and part of the second container film 12 belonging to the same container cavity 32 will deform simultaneously. In this case, the cross-sectional shape of the container cavity 32 is circular or approximately circular.

[0069] In this application, first, the part of the second container film 12 belonging to each container cavity 32 is deformed, so that in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to the container cavity 32 is greater than the length of the first container film 11 belonging to the container cavity 32.

[0070] In the subsequent inflation process, the degree of deformation (becoming arc-shaped) of part of the second container film 12 belonging to the container cavity 32 is much greater than the degree of deformation (slightly bending or basically remaining unchanged) of part of the first container film 11 belonging to the container cavity 32.

[0071] The air column bag made of the corrugated container column film manufactured by the corrugated container column film manufacturing method disclosed in this application has a flat outer surface after inflation, can provide more contact area, can improve the bonding firmness and the stability during stacking, and simplifies the packaging process.

[0072] Please refer to Figure 9 and Figure 10 , the steps of deforming the part of the second container film 12 belonging to each container cavity 32 are as follows:

[0073] S201, use the flat surface on the upper suction mold to adsorb the first container film 11;

[0074] S202, use the deformed surface on the lower suction mold to adsorb the second container film 12, so that in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to the container cavity 32 is greater than the length of the first container film 11 belonging to the container cavity 32.

[0075] Specifically, two molds (upper suction mold and lower suction mold) are used to process the first container film 11 and the second container film 12 respectively. The flat surface on the upper suction mold adsorbs the first container film 11 to keep the shape of the first container film 11 unchanged, and the deformed surface on the lower suction mold adsorbs the second container film 12 to deform the part of the second container film 12 belonging to each container cavity 32, and finally obtain as shown in Figure 10 shown.

[0076] The principle of deformation is to make the second container film 12 fit on the deformed surface of the lower suction mold by means of negative pressure adsorption.

[0077] In the above process, for the selection of the first container film 11 and the second container film 12, there are the following two cases:

[0078] First, the thickness of the first container film 11 is greater than the thickness of the second container film 12;

[0079] Second, the tensile strength of the first container film 11 is greater than the tensile strength of the second container film 12.

[0080] Both of these two methods can make the deformation degree (become arc-shaped) of the part of the second container film 12 belonging to the container cavity 32 much greater than the deformation degree (slightly bent or basically unchanged) of the part of the first container film 11 belonging to the container cavity 32 during the inflation process.

[0081] Please refer to Figure 2 , 6 , Figures 11 - 13 , this application also discloses a second method for manufacturing the corrugated container column film. On the basis of the first manufacturing method, a third container film 13 symmetrical to the first container film 11 is added, and the specific steps are as follows:

[0082] S301, fix the first air valve film 21 on the first container film 11;

[0083] S302, fix the second container film 12 on the first container film 11 and the first air valve film 21 to form an air passage 31 extending along the first air valve film 21 and container cavities 32 arranged in sequence along the first air valve film 21; the input end of each one-way channel on the first air valve film 21 is communicated with the air passage 31, and the output end of each one-way channel of the first air valve film 21 is communicated with the corresponding container cavity 32;

[0084] S303, deform the part of the second container film 12 belonging to each container cavity 32 so that in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to the container cavity 32 is greater than the length of the first container film 11 belonging to the container cavity 32;

[0085] S304. Fix the second air valve film 22 on the third container film 13; and

[0086] S305. Fix the second air valve film 22 and the third container film 13 on the second container film 12 to form an air passage 31 extending along the second air valve film 22 and container cavities 32 arranged in sequence along the second air valve film 22; the input end of each one-way passage on the second air valve film 22 communicates with the air passage 31, and the output end of each one-way passage communicates with the corresponding container cavity 32.

[0087] Compared with the content described in steps S101 to S103, the difference is that the second air valve film 22 and the third container film 13 are added. Specifically, in step S304, the second air valve film 22 is fixed on the third container film 13 through the heat-sealing die III and the lower template III.

[0088] In step S305, the second air valve film 22 and the third container film 13 are fixed (using the heat-sealing die IV and the lower template IV) on the second container film 12 to form an air passage 31 extending along the second air valve film 22 and container cavities 32 arranged in sequence along the second air valve film 22.

[0089] The input end of each one-way passage on the second air valve film 22 communicates with the air passage 31, and the output end of each one-way passage communicates with the corresponding container cavity 32.

[0090] Please refer to Figure 12 and Figure 13 , in the description of the above content, the number of air passages 31 is two, and the number of container cavities 32 is two groups. The first group of container cavities 32 communicates with the first air passage 31 through the first air valve film 21, and the second group of container cavities 32 communicates with the second air passage 31 through the second air valve film 22.

[0091] The second container film 12 is located between the first container film 11 and the third container film 13. For the convenience of description here, the two surfaces of the second container film 12 are respectively called the inner side surface and the outer side surface. The inner side surface of the second container film 12 faces the first container film 11, and the outer side surface of the second container film 12 faces the third container film 13.

[0092] In this way, when the air column bag made of the corrugated container column film manufactured by the corrugated container column film manufacturing method disclosed in the present application is inflated, the inner surface and the outer surface of the air column bag are both flat.

[0093] The present application also discloses a third corrugated container column film manufacturing method, and the specific steps are as follows:

[0094] S401. Fix the first air valve film 21 on the first container film 11;

[0095] Fix the second container film 12 to the first container film 11 and the first air valve film 21 to obtain a single-sided corrugated column film; the container cavities 32 on the single-sided corrugated column film are arranged in sequence along the first air valve film 21, and the output end of each one-way channel on the first air valve film 21 communicates with the corresponding container cavity 32;

[0096] S402, deform the part of the second container film 12 belonging to each container cavity 32 such that, in the cross-sectional direction of the container cavity 32, the length of the second container film 12 belonging to this container cavity 32 is greater than the length of the first container film 11 belonging to this container cavity 32; obtain a single-sided corrugated column film;

[0097] S403, fix the second air valve film 22 to the third container film 13; and

[0098] S404, fix the second air valve film 22 and the third container film 13 to the single-sided corrugated column film to form an air duct 31 extending along the second air valve film 22 and container cavities 32 arranged in sequence along the second air valve film 22;

[0099] S405, the output end of each one-way channel of the second air valve film 22 communicates with the corresponding container cavity 32, and the input end of each one-way channel communicates with the air duct 31; the input end of each one-way channel on the first air valve film 21 communicates with the air duct 31.

[0100] Compare Figure 14 and Figure 15 With the content described in steps S301 to S305, adjust the number of air ducts 31 to one.

[0101] Please refer to Figure 16 and Figure 17 In the second and third manufacturing methods, in the process of heat-sealing the third container film 13, it is necessary to pre-apply a coating 4 on the first container film 11 or the second air valve film 22. The function of the coating 4 is to prevent the corresponding parts of the first container film 11 and the second air valve film 22 from sticking together when the second air valve film 22 is heat-sealed to the third container film 13.

[0102] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A method for manufacturing a corrugated container column film, characterized in that, Comprising: Fixing the first air valve film on the first container film; Fixing the second container film on the first container film and the first air valve film to form an air passage extending along the first air valve film and container cavities arranged in sequence along the first air valve film; the input end of each one-way passage on the first air valve film communicates with the air passage, and the output end of each one-way passage communicates with the corresponding container cavity, and the first air valve film is located between the first container film and the second container film; Deforming the part of the second container film belonging to each container cavity such that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity; Wherein, after the air column bag made of corrugated container column film is inflated, the outer surface of the air column bag is flat.

2. The method for manufacturing a corrugated container column film according to claim 1, wherein Deforming the part of the second container film belonging to each container cavity includes: Using the flat surface on the upper suction mold to adsorb the first container film; Using the deformed surface on the lower suction mold to adsorb the second container film such that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity.

3. The method for manufacturing a corrugated container column film according to claim 1 or 2, characterized in that The thickness of the first container film is greater than the thickness of the second container film or the tensile strength of the first container film is greater than the tensile strength of the second container film.

4. A method for manufacturing a corrugated container column film, characterized in that, Comprising: Fixing the first air valve film on the first container film; Fixing the second container film on the first container film and the first air valve film to form an air passage extending along the first air valve film and container cavities arranged in sequence along the first air valve film; the input end of each one-way passage on the first air valve film communicates with the air passage, and the output end of each one-way passage on the first air valve film communicates with the corresponding container cavity; the first air valve film is located between the first container film and the second container film; Deforming the part of the second container film belonging to each container cavity such that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity; Fixing the second air valve film on the third container film; And Fixing the second air valve film and the third container film on the second container film to form an air passage extending along the second air valve film and container cavities arranged in sequence along the second air valve film; The input end of each one-way passage on the second air valve film communicates with the air passage, and the output end of each one-way passage communicates with the corresponding container cavity; the second air valve film is located between the second container film and the third container film; Wherein, after the air column bag made of corrugated container column film is inflated, both the inner surface and the outer surface of the air column bag are flat.

5. The method for manufacturing a corrugated container column film according to claim 4, characterized in that, Deforming the part of the second container film belonging to each container cavity includes: Using the flat surface on the upper suction mold to adsorb the first container film; Using the deformed surface on the lower suction mold to adsorb the second container film such that in the cross-sectional direction of the container cavity, the length of the second container film belonging to the container cavity is greater than the length of the first container film belonging to the container cavity.

6. The method for manufacturing a corrugated container column film according to claim 4 or 5, characterized in that, The thickness of the second container film is less than the thickness of the first container film and the third container film or the tensile strength of the second container film is less than the tensile strength of the first container film and the third container film.

7. A method for manufacturing a corrugated container column film, characterized in that, Comprising: Fixing the first air valve film on the first container film; Fix the second container film on the first container film and the first air valve film, and the output end of each one-way channel on the first air valve film communicates with the corresponding container cavity; the first air valve film is located between the first container film and the second container film; Deform the part of the second container film belonging to each container cavity, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to this container cavity is greater than the length of the first container film belonging to this container cavity; Obtain a single-sided corrugated column film; Fix the second air valve film on the third container film; And Fix the second air valve film and the third container film on the single-sided corrugated column film to form an air channel extending along the second air valve film and container cavities arranged in sequence along the second air valve film; The output end of each one-way channel of the second air valve film communicates with the corresponding container cavity, and the input end of each one-way channel communicates with the air channel; the second air valve film is located between the second container film and the third container film; The input end of each one-way channel on the first air valve film communicates with the air channel; Among them, after the air column bag made of the corrugated container column film is inflated, the inner surface and the outer surface of the air column bag are both flat.

8. The method for manufacturing a corrugated container column film according to claim 7, wherein Deforming the part of the second container film belonging to each container cavity includes: Use the flat surface on the upper suction mold to adsorb the first container film; Use the deformed surface on the lower suction mold to adsorb the second container film, so that in the cross-sectional direction of the container cavity, the length of the second container film belonging to this container cavity is greater than the length of the first container film belonging to this container cavity.

9. The method for manufacturing a corrugated container column film according to claim 7 or 8, characterized in that, The thickness of the second container film is less than the thickness of the first container film and the third container film or the tensile strength of the second container film is less than the tensile strength of the first container film and the third container film.

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