Folding craft-based sealing bag and method for processing same

Abstract

Disclosed are a folding craft-based sealing bag and a method for processing same, the method comprising: presetting a base folding line (1) on an upper surface of a piece of base paper that has been spread flat, and performing first plastic packaging on a gap between overlapping areas of a second folding part (200) and a first folding part (100) to form a paper roll that is opened at two ends and enclosed on the sides; opening up the paper roll, so as to press the paper roll from a side along a first side-pressing line (31) preset on the paper roll to tuck in the paper roll and form a first gusset (101), and press the paper roll from a side along a second side-pressing line (32) preset on the paper roll to tuck in the paper roll and form a second gusset (102); and, on the basis of a preset bottom folding line (13), performing plastic packaging on the bottom opening of the completely press-fitted paper roll to form a finished sealing bag product. According to the described sealing bag and the method for processing same, both the capacity and quality of the sealing bag are effectively attained by means of the gusset design.

Description

Sealed bags based on folding technology and their processing methods

[0001] This application is based on and claims priority to Chinese Patent Application No. 202410671945.X, filed on May 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of packaging processing, and in particular to a sealing bag based on folding technology and its processing method. Background Technology

[0003] Existing sealing bag design and manufacturing technologies suffer from several problems, including excessive material usage, insufficient sealing performance, complex production processes, and poor user experience. Imbalances in the structural design of existing sealing bag technologies can lead to deformation or breakage during use, affecting overall stability. Furthermore, some sealing bags involve excessive material waste, increasing costs and reducing portability. Sealing performance is another area for improvement; some sealing bags have inadequate bottom seals, leading to leakage and compromising product safety and consumer trust. Complex opening and closing designs also result in a poor user experience, especially in applications requiring rapid and frequent use. Complex production processes can lead to low automation, reducing production efficiency and increasing labor costs. To address these issues, new design solutions and technologies are needed to improve the balance, portability, sealing performance, and production efficiency of sealing bags, thereby enhancing overall technological effectiveness. Application content

[0004] This application provides a sealing bag based on folding technology and its processing method, aiming to solve the problem that the capacity and quality of sealing bags cannot be effectively balanced in existing technologies.

[0005] In one aspect, embodiments of this application disclose a method for processing a sealed bag based on a folding process. A folding baseline is preset on the upper surface of a flat base paper piece. The folding baseline is parallel to a first edge line and a second edge line of the base paper piece. The portion of the surface between the first edge line and the folding baseline forms a first fold, and the portion of the surface between the second edge line and the folding baseline forms a second fold. The portion of the base paper piece located to the left of the folding baseline is folded according to the preset first fold line, so that the first edge line falls to the right of the folding baseline. The portion of the base paper piece located to the right of the folding baseline is folded according to the preset second fold line, so that the second edge line falls to the left of both the folding baseline and the first edge line. A portion of the surface of the second fold is pressed onto the first fold. The gap between the overlapping areas of the second fold and the first fold is firstly sealed to form open sides at both ends. A paper roll is enclosed by a surface; the paper roll is supported and pressed along a preset first side pressure line to form a first closure and a third fold line, the area between the first fold line and the first side pressure line serving as the bottom surface of the first closure, and the area between the first side pressure line and the third fold line serving as the top surface of the first closure; the paper roll is pressed along a preset second side pressure line to form a second closure and a fourth fold line, the area between the second fold line and the second side pressure line serving as the bottom surface of the second closure, and the area between the second side pressure line and the fourth fold line serving as the top surface of the second closure; the paper roll is fully compressed to remove air so that the projection of the third fold line falls on the first fold line, and the projection of the fourth fold line falls on the second fold line; the bottom opening of the fully compressed paper roll is sealed according to a preset bottom fold line to form a finished sealed bag.

[0006] Furthermore, a portion of the surface of the second fold is pressed onto the first fold to form a sealing portion, the width of which is 1-5 cm.

[0007] Furthermore, before the first sealing, the method further includes: setting the area where the second folded part overlaps with the first folded part as an adhesive application area, applying sealing adhesive to the adhesive application area, wherein the width of the adhesive application area is 2-6cm.

[0008] Furthermore, the first molding process includes hot pressing, wherein the hot pressing temperature is 100-350℃ and the hot pressing pressure is 8-20 kg / dm³. 2 .

[0009] Furthermore, the duration of the hot pressing is 1-4 seconds.

[0010] Secondly, this application also discloses a sealing bag based on a folding process, which is manufactured by the above-mentioned sealing bag processing method based on a folding process. The sealing bag includes a first opening and a second opening on both sides of the bag body. The first opening includes a bottom surface and a top surface symmetrical about a first side pressure line. The two sides of the bottom surface of the first opening are respectively a first side pressure line and a first fold line, and the two sides of the top surface of the first opening are respectively a first side pressure line and a third fold line. The second opening includes a bottom surface and a top surface symmetrical about a second side pressure line. The two sides of the bottom surface of the second opening are respectively a second side pressure line and a second fold line, and the two sides of the top surface of the first opening are respectively a second side pressure line and a fourth fold line.

[0011] Furthermore, the sealed bag includes a bottom sealing area at the bottom of the bag body, which seals the bottom opening of the fully pressed paper roll according to a preset bottom fold line.

[0012] Furthermore, the top and bottom surfaces of the first fold have equal areas, the top and bottom surfaces of the second fold have equal areas, the top surface area of ​​the first fold is equal to the top surface area of ​​the second fold, and the top surface area of ​​the first fold is 10%-20% of the area of ​​the first fold.

[0013] The sealing design of the aforementioned resealable bags plays a crucial role in ensuring both capacity and quality. Its tight structure allows for more compact storage when folded or stacked, saving storage space and reducing transportation costs. This design is particularly suitable for portable products such as cosmetic bags and snack bags, which can be easily placed in a bag or carried on your person, offering greater convenience. It effectively balances capacity and quality, enhancing product practicality and convenience, increasing customer goodwill and loyalty, and contributing to improved brand awareness and image. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a schematic diagram of the basic paper component of the sealed bag based on the folding process provided in the embodiment of this application.

[0016] Figure 2 is a schematic diagram of the sealed bag laid flat after the first sealing process based on the folding process provided in the embodiment of this application;

[0017] Figure 3 is a schematic diagram of the front cross-section of the paper roll provided in an embodiment of this application;

[0018] Figure 4 is a schematic diagram of the front cross section of the paper roll provided in the embodiment of this application under side pressure on both sides;

[0019] Figure 5 is a plan view of a sealing bag based on folding technology provided in an embodiment of this application.

[0020] Icon labels:

[0021] Folding baseline; 11. First edge line; 12. Second edge line; 100. First fold;

[0022] 200. Second fold; 21. First fold line; 22. Second fold line; 31. First side pressure line; 101. First closing; 23. Third fold line; 32. Second side pressure line; 102. Second closing; 24. Fourth fold line; 13. Bottom fold line; 110. Position of the first edge line after the first sealing; 120. Position of the second edge line after the first sealing; 300. Sealing part; 400. Bottom sealing area. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] As shown in Figures 1 to 5, in a first aspect, embodiments of this application disclose a method for processing a sealed bag based on a folding process. A folding baseline 1 is preset on the upper surface of a flat base paper piece. The folding baseline 1 is parallel to the first edge line 11 and the second edge line 12 of the base paper piece. The portion of the surface between the first edge line 11 and the folding baseline 1 forms a first fold 100, and the portion of the surface between the second edge line 12 and the folding baseline 1 forms a second fold 200. The portion of the base paper piece located to the left of the folding baseline 1 is folded according to the preset first fold line 21, so that the first edge line 11 falls to the right of the folding baseline 1. The portion of the base paper piece located to the right of the folding baseline 1 is folded according to the preset second fold line 22, so that the second edge line 12 falls to the left of both the folding baseline 1 and the first edge line 11. A portion of the surface of the second fold 200 is pressed onto the first fold 100. The gap between the overlapping areas of the second fold 200 and the first fold 100 is firstly sealed to form an open-end design. A paper roll is formed by side-enclosing the opening; the paper roll is supported to press it along a pre-set first side pressure line 31 so that the paper roll is embedded to form a first closing 101 and a third fold line 23, the area between the first fold line 21 and the first side pressure line 31 is the bottom surface of the first closing 101, and the area between the first side pressure line 31 and the third fold line 23 is the top surface of the first closing 101; the paper roll is pressed along a pre-set second side pressure line 32 so that the paper roll is embedded to form a second closing 102 and a third fold line 23. The area between the fourth fold line 24, the second fold line 22 and the second side pressure line 32 serves as the bottom surface of the second closing line 102, and the area between the second side pressure line 32 and the fourth fold line 24 serves as the top surface of the second closing line 102. The paper roll is fully pressed to remove air so that the projection of the third fold line 23 falls on the first fold line 21 and the projection of the fourth fold line 24 falls on the second fold line 22. The bottom opening of the fully pressed paper roll is sealed according to the preset bottom fold line 13 to form a finished sealed bag.

[0028] In actual implementation, plastic sealing refers to plastic encapsulation, which can be applied to most flexible materials. First, the base paper is laid flat on the operating platform, and a folding baseline 1 is preset on the upper surface of the film. The folding baseline 1 can be flexibly preset and adjusted according to the requirements of the finished product. These center lines need to be parallel to the first edge line 11 and the second edge line 12 of the base paper. The preset folding baseline 1 will guide the subsequent folding operations. Next, according to the preset first fold line 21, the part of the base paper located to the left of the folding baseline 1 is folded over, so that the first edge line 11 is folded to the right of the folding baseline 1. Then, according to the preset second fold line 22, the part of the base paper located to the right of the folding baseline 1 is folded over, so that the second edge line 12 is folded to the left of the folding baseline 1 and the first edge line 11. In this way, the first fold 100 and the second fold 200 are formed. Then, a portion of the surface of the second fold 200 is pressed onto the first fold 100 to form a sealing part 300. This sealing part 300 is a key part of the sealed bag, used to ensure the airtightness of the sealed bag. Next, the gap between the overlapping areas of the second fold 200 and the first fold 100 is first sealed with plastic to form a paper roll with open ends and closed sides. This step can be performed by heat pressing, gluing, or other methods. Then, the paper roll is stretched so that the closed paper roll can be subjected to lateral force. Air introduction can be achieved using specialized equipment, such as a cylindrical platform, to place the paper roll on the outside of the platform, ensuring the forming and stability of the paper roll. Next, the paper roll is pressed laterally along the preset first side pressure line 31 to form the first closing line 101 and the third fold line 23. The area between the first fold line 21 and the first side pressure line 31 serves as the bottom surface of the first closing line 101, and the area between the first side pressure line 31 and the third fold line 23 serves as the top surface of the first closing line 101. Similarly, the paper roll is pressed laterally along the preset second side pressure line 32 to form the second closing line 102 and the fourth fold line 24. The area between the second fold line 22 and the second side pressure line 32 serves as the bottom surface of the second closing 102, and the area between the second side pressure line 32 and the fourth fold line 24 serves as the top surface of the second closing 102. Then, the paper roll is fully pressed together, and the air in the center of the paper roll is removed. This step can be performed by heat pressing, mechanical pressing, or other methods. After full pressing, the projections of the third fold line 23 and the fourth fold line 24 fall on the first fold line 21 and the second fold line 22, respectively. That is, the third fold line 23 is attached to the first fold line 21, and the fourth fold line 24 is attached to the second fold line 22, forming a complete sealed bag structure. Finally, according to the preset bottom fold line 13, the bottom opening of the fully pressed paper roll is sealed with plastic to form the finished sealed bag. This step can be performed by heat pressing, gluing, or other methods to ensure the bottom sealing of the sealed bag. Through the above steps, a sturdy and well-sealed sealed bag can be produced, suitable for various packaging needs. At the same time, this method can also improve production efficiency and reduce costs.

[0029] In conclusion, the closure design of resealable bags plays a crucial role in ensuring both capacity and quality. Through its tight structure, the closure allows the bags to be stored more compactly when folded or stacked, saving storage space and reducing transportation costs. This design is particularly suitable for portable products such as cosmetic bags and snack bags, which can be easily placed in a bag or carried on your person, offering greater convenience.

[0030] Meanwhile, the sealing design also ensures the quality of the resealable bag. By adding extra folds or reinforcing layers at the sealing point, the structural strength of the bag when used to hold items is enhanced, making the bag more durable and wear-resistant. This design not only improves the product's practicality but also better suits customer usage habits. Furthermore, the sealing design considers aesthetics. A carefully designed sealing shape and placement can make the bag look more refined and layered, thus attracting consumer attention. A unique and clever sealing design can leave a lasting impression and help build brand recognition. The sealing design is also relatively simple and easy to implement in the production process, requiring no complex machinery or materials. Precise creases and stitching allow the bag to be easily folded into the desired shape and size. At the same time, the sealing area is easy to clean and maintain during bag use. In conclusion, the sealing design of resealable bags plays a crucial role in ensuring capacity and quality. It not only improves the product's practicality and convenience but also enhances customer goodwill and loyalty, while also contributing to improved brand awareness and image.

[0031] Furthermore, a portion of the surface of the second fold 200 is pressed onto the first fold 100 to form a sealing portion 300, the width of which is 1-5 cm.

[0032] Furthermore, before the first sealing, the method also includes: setting the area where the second fold 200 overlaps with the first fold 100 as the adhesive application area, applying sealing adhesive to the adhesive application area, the width of the adhesive application area being 2-6cm.

[0033] Furthermore, the first molding process includes hot pressing, with a temperature of 100-350℃ and a pressure of 8-20 kg / dm². 2 .

[0034] Furthermore, the hot pressing time is 1-4 seconds.

[0035] The width of the sealing portion 300 is designed to be 1-5cm. This range ensures the sealing performance of the bag while also facilitating user operation and sealing. An adhesive application area is provided in the area where the second fold overlaps with the first fold, and a sealing adhesive is applied to the area where the second fold overlaps above the first fold. This design improves the adhesive strength of the sealing portion 300, ensuring long-term sealing performance. The width of the adhesive application area is 2-6cm, sufficient to cover the overlapping area to ensure a good adhesive bond.

[0036] The first sealing is usually done by hot pressing, with the temperature and pressure parameters set at 100-350℃ and 8-20 kg / dm³. 2 These conditions ensure that the paper material deforms and bonds well during the sealing process, forming a robust seal. The heat-sealing time is 1-4 seconds, depending on the material properties of the paper and the required adhesion strength. These detailed process parameters and technical measures together constitute the folding-based sealing bag processing method, ensuring the sealing performance, durability, and user-friendliness of the bags, while also improving production efficiency and product quality. Through these precise controls, sealing bags that meet the needs of various application scenarios can be produced, whether for food packaging, cosmetic packaging, or industrial product packaging.

[0037] Secondly, this application also discloses a sealing bag based on a folding process, which is manufactured by the above-mentioned sealing bag processing method based on a folding process. The sealing bag includes a first closing 101 and a second closing 102 disposed on both sides of the bag body. The first closing 101 includes a bottom surface and a top surface symmetrical about the first side pressure line 31. The two sides of the bottom surface of the first closing 101 are the first side pressure line 31 and the first fold line 21, respectively. The two sides of the top surface of the first closing 101 are the first side pressure line 31 and the third fold line 23, respectively. The second closing 102 includes a bottom surface and a top surface symmetrical about the second side pressure line 32. The two sides of the bottom surface of the second closing 102 are the second side pressure line 32 and the second fold line 22, respectively. The two sides of the top surface of the first closing 101 are the second side pressure line 32 and the fourth fold line 24, respectively.

[0038] Furthermore, the sealed bag includes a bottom sealing area 400 located at the bottom of the bag body, which seals the bottom opening of the fully pressed paper roll according to a preset bottom fold line 13.

[0039] Preferably, after the bottom sealing area 400 is sealed, it is folded up again along the original bottom edge line, making the bottom sealing area 400 more flexible and convenient for bag transportation.

[0040] Furthermore, the top and bottom surfaces of the first fold 101 have equal areas, the top and bottom surfaces of the second fold 102 have equal areas, the top surface area of ​​the first fold 101 is equal to the top surface area of ​​the second fold 102, and the top surface area of ​​the first fold 101 is 10%-20% of the area of ​​the first fold 100.

[0041] The aforementioned resealable bags are manufactured using the processing method described in the first aspect. The structural design of the resealable bags aims to provide an optimized packaging solution that meets functional requirements while offering a good user experience.

[0042] The resealable bag includes a first sealing opening 101 and a second sealing opening 102 located on both sides of the bag body. These sealing openings are key parts of the resealable bag, formed through folding and pressing processes to ensure the bag's sealing performance. The first sealing opening 101 includes a bottom surface and a top surface symmetrical about a first side pressure line 31. The two sides of the bottom surface are the first side pressure line 31 and the first fold line 21, respectively, and the two sides of the top surface are the first side pressure line 31 and the third fold line 23, respectively. This design gives the first sealing opening 101 a stable structure while facilitating the removal of contents. The second sealing opening 102 also includes a bottom surface and a top surface symmetrical about a second side pressure line 32. The two sides of the bottom surface are the second side pressure line 32 and the second fold line 22, respectively, and the two sides of the top surface are the second side pressure line 32 and the fourth fold line 24, respectively. The design of the second sealing opening 102 is similar to that of the first sealing opening 101, ensuring the overall structural strength and sealing performance of the resealable bag.

[0043] Furthermore, the sealed bag also includes a bottom sealing area 400 located at the bottom of the bag body. This area seals the bottom opening of the fully pressed paper roll according to a preset bottom fold line 13 to ensure a bottom seal and prevent the contents (such as rice) inside from bursting through the bottom of the bag under gravity and leaking out. In addition, the top and bottom areas of the first sealing opening 101 and the second sealing opening 102 are equal, ensuring the stability and balance of the sealing. The equal top area of ​​the first sealing opening 101 and the second sealing opening 102 means that the two sealing openings are structurally balanced, contributing to the overall stability of the bag. The top area of ​​the first sealing opening 101 is 10%-20% of the area of ​​the first fold 100; this design ensures that the sealing portion is neither too thin nor too heavy, thus optimizing the overall packaging's lightness and strength. In summary, the sealing bag design based on folding technology provided in this application achieves optimized structure and balanced sealing performance through precise folding and pressing processes. It is less likely to break when holding heavy objects, improves the load-bearing capacity of the bag, and ensures user-friendliness and packaging efficiency.

[0044] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of processing a sealed bag based on a folding process, characterized by, The method comprises the following steps: predetermined folding base line is set on the upper surface of the laid flat base paper, the folding base line is parallel to the first edge line and the second edge line of the base paper, the part of the surface between the first edge line and the folding base line is the first folding part, and the part of the surface between the second edge line and the folding base line is the second folding part; the part of the base paper on the left side of the folding base line is folded according to the predetermined first folding line, so that the first edge line falls on the right side of the folding base line, and the part of the base paper on the right side of the folding base line is folded according to the predetermined second folding line, so that the second edge line falls on the left side of the folding base line and the first edge line, and part of the surface of the second folding part is pressed on the first folding part; the gap between the overlapping area of the second folding part and the first folding part is first plastic-wrapped to form a paper roll with open ends on the side surface; the paper roll is supported and side-pressed along the first side pressing line pre-set on the paper roll to make the paper roll inlaid to form a first closing part and a third folding line, the area between the first folding line and the first side pressing line serves as the bottom surface of the first closing part, and the area between the first side pressing line and the third folding line serves as the top surface of the first closing part; the paper roll is side-pressed along the second side pressing line pre-set on the paper roll to make the paper roll inlaid to form a second closing part and a fourth folding line, the area between the second folding line and the second side pressing line serves as the bottom surface of the second closing part, and the area between the second side pressing line and the fourth folding line serves as the top surface of the second closing part; the paper roll is completely pressed to remove air, so that the projection of the third folding line falls on the first folding line, and the projection of the fourth folding line falls on the second folding line; the bottom opening of the completely pressed paper roll is plastic-wrapped according to the pre-set bottom folding line to form a finished sealed bag.

2. The method of claim 1, wherein, Part of the surface of the second folding part is pressed on the first folding part to form a sealing part, and the width of the sealing part is 1-5 cm.

3. The method of claim 1, wherein the method further comprises: Before the first plastic wrapping, the method further comprises: setting the overlapping area of the second folding part and the first folding part as a glue applying area, plastic-wrapping the glue applying area, and the width of the glue applying area is 2-6 cm.

4. The method of claim 3, wherein the method further comprises: The first plastic sealing includes hot pressing, the temperature of the hot pressing is 100-350℃, the pressure of the hot pressing is 8-20kg / dm 2 .

5. The method of claim 4, wherein the method further comprises: The hot pressing time is 1-4 seconds.

6. A sealed bag based on a folding process, manufactured by the method for manufacturing a sealed bag based on a folding process according to any one of claims 1 to 5, characterized in that, The sealed bag comprises a first closing part and a second closing part arranged on both sides of the bag body, the first closing part comprises a bottom surface and a top surface symmetrical to the first side pressing line, the two sides of the bottom surface of the first closing part are the first side pressing line and the first folding line respectively, and the two sides of the top surface of the first closing part are the first side pressing line and the third folding line respectively; the second closing part comprises a bottom surface and a top surface symmetrical to the second side pressing line, the two sides of the bottom surface of the second closing part are the second side pressing line and the second folding line respectively, and the two sides of the top surface of the second closing part are the second side pressing line and the fourth folding line respectively.

7. The sealed bag based on a folding process according to claim 6, characterized in that, The sealed bag comprises a bottom plastic-wrapped area arranged at the bottom of the bag body, and the bottom plastic-wrapped area plastic-wraps the bottom opening of the completely pressed paper roll according to the pre-set bottom folding line.

8. The sealed bag based on a folding process according to claim 6, characterized in that, The top surface of the first pocket is equal in area to the bottom surface, the top surface of the second pocket is equal in area to the bottom surface, the top surface of the first pocket is equal in area to the top surface of the second pocket, and the top surface of the first pocket is 10-20% of the area of the first fold.

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