Air column packaging bag with inner covering film

Abstract

The invention provides an air column packaging bag with an inner covering film, which comprises an air column bag body, the air column bag body is provided with an accommodating cavity and a plurality of air columns arranged around the accommodating cavity, and the plurality of air columns are sequentially connected to form a packaging bag structure; the inner covering film is arranged in the air column bag body; the heat sealing structure is formed on the air column bag body and the inner covering film, the inner covering film is bonded to the inner wall of the air column through the heat sealing structure, and a containing cavity is formed in the containing cavity; the heat sealing structure comprises a fixed heat sealing unit and at least one tightening heat sealing unit, the edge of the inner covering film is bonded to the inner side of the air column through the fixed heat sealing unit, and the tightening heat sealing unit is formed on the inner covering film and enables the containing cavity to be in a tightened and contracted state.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and more particularly to an air column packaging bag with an inner liner. Background Technology

[0002] In the field of logistics and transportation packaging, square air column bags are widely used due to their regular shape, ease of stacking, and compatibility with standard shipping cartons. This type of packaging typically consists of multiple layers of film heat-sealed to form an array of inflatable air columns, creating a bag structure with a cubical containment cavity. Its core technology lies in utilizing the cushioning properties of the air columns to resist external impacts, compression, and other transportation risks.

[0003] Existing square air column packaging bags are usually designed to fit a cubic structure to accommodate three-dimensional packaging cartons or meet transportation needs, thus solving the problem of convenient external transportation of goods to a certain extent.

[0004] However, existing square air column packaging bags still have significant shortcomings in practical applications: when packaging irregularly shaped items or items smaller than the containment cavity, the items are prone to horizontal displacement, rotation, or vertical shaking during transportation. The air column structure can only provide external cushioning and cannot suppress the inertial movement of the internal items. The cubic containment cavity of existing square bags has a low fit with the shape of the items, creating ineffective space. Although filler materials such as bubble wrap can be used to fill the gaps, this increases costs and the filler is prone to displacement and failure. In addition, existing technological solutions focus on optimizing air column density or adding internal partitions, but neither has established an internal mechanical structure to actively constrain the movement of the items, resulting in fragile items still being at risk of wear and collision due to shaking.

[0005] Therefore, how to solve the problem of shaking of items inside square bags, especially irregularly shaped items, and improve their stability during transportation has become an urgent problem to be solved in existing technologies. Summary of the Invention

[0006] A key advantage of this invention is that it provides an air column packaging bag with an inner liner, wherein the air column packaging bag, through a hammock structure and by gluing the two sides, can effectively prevent the inner liner from shaking, while also providing a cushioning effect to prevent the contents from shifting.

[0007] Another advantage of the present invention is that it provides an air column packaging bag with an inner film, wherein the air column packaging bag has heat-sealed sides and multiple bends in the air column design, combined with the heat-sealing line structure adapted at the top, which facilitates the bending of the air column and insertion into the receiving cavity; the air column is slightly longer, which is conducive to stable assembly, can provide cushioning for the items in the receiving cavity, and can hold the items to restrict their movement.

[0008] Another advantage of the present invention is that it provides an air column packaging bag with an inner liner, wherein the inner liner design of the air column packaging bag enhances the wrapping and stability. After the inner liner and the air column bag are heat-sealed, the inner liner is suspended in the receiving cavity, which can wrap the item and prevent it from moving in the cavity. The heat-sealing of the inner liner at two places creates a tight feeling, which can prevent the item from swaying from side to side. Combined with the restraining effect of the upper air column, a good overall stability effect is formed, which further improves the stability of transportation.

[0009] Another advantage of the present invention is that it provides an air column packaging bag with an inner liner, wherein the inner liner of the air column packaging bag has a built-in active restraint structure, which eliminates horizontal swaying and rotation of items inside the square bag through the pre-tension design of the hammock-type inner liner.

[0010] Another advantage of the present invention is that it provides an air column packaging bag with an inner liner, wherein the air column packaging bag utilizes the elastic and taut properties of the inner liner to tightly fit the surface of irregular items, reducing unused space.

[0011] Another advantage of the present invention is that it provides an air column packaging bag with an inner liner, wherein the air column packaging bag is integrated with the inner liner by bending and inserting the air column, thereby eliminating the need for additional fillers.

[0012] One objective of this invention is to solve the problem of poor stability and easy shaking of items, especially irregular items, inside square bags during transportation in the prior art. The invention aims to prevent the items inside the bag from shaking through structural design, thereby improving their transportation stability.

[0013] According to one aspect of the present invention, an air column packaging bag with an inner liner, which achieves the aforementioned and other objectives and advantages, comprises:

[0014] An air column bag body, the air column bag body having a receiving cavity and a plurality of air columns arranged around the receiving cavity, the plurality of air columns being connected in sequence to form a packaging bag structure;

[0015] At least one inner lining membrane is embedded in the air column bag body;

[0016] A heat-sealing structure is formed on the air column bag body and the inner lining film. The inner lining film is bonded to the inner wall of the air column through the heat-sealing structure and forms an enclosing cavity within the receiving cavity.

[0017] The heat-sealing structure includes a fixed heat-sealing unit and at least one shrink-sealing unit. The fixed heat-sealing unit bonds the edge of the inner liner to the inside of the air column, and the shrink-sealing unit is formed on the inner liner and makes the enclosing cavity taut and contracted.

[0018] According to one embodiment of the present invention, the inner liner is a single-layer membrane structure, the inner liner includes a membrane body and a membrane edge portion integrally extending from the membrane body, the membrane edge portion is heat-sealed to the air column along the inner edge of the receiving cavity by the fixed heat-sealing unit, and the membrane body is suspended in the receiving cavity to form a hammock-like suspension structure.

[0019] According to one embodiment of the present invention, the membrane body includes a membrane bottom and a membrane connecting portion, the membrane connecting portion connecting the membrane bottom and the membrane edge portion, and the shrink heat sealing unit is formed in the membrane connecting portion.

[0020] According to one embodiment of the present invention, the shrink-sealing unit is a heat-sealing structure arranged symmetrically at two locations. The shrink-sealing unit is formed by heat-sealing a portion of the adjacent film layer structure of the inner covering film after stretching it to a taut state.

[0021] According to one embodiment of the present invention, the membrane body forms multiple heat-sealing edge pleats around the shrink-sealing unit, and the heat-sealing edge pleats extend outward from the shrink-sealing unit along the membrane body in a concave-convex structure.

[0022] According to one embodiment of the present invention, the heat-sealed edge pleats extend in a transverse, longitudinal, or radial manner, wherein the transverse direction is perpendicular to the air column and the longitudinal direction is parallel to the air column.

[0023] According to one embodiment of the present invention, the initial area of ​​the inner liner is larger than the bottom area of ​​the receiving cavity, and the shrinkage heat-sealing unit causes the inner liner to form a permanent prestress. When the article is placed in the receiving cavity, the bottom of the inner liner sinks under the action of gravity and triggers the unfolding of the heat-sealed edge wrinkles.

[0024] According to one embodiment of the present invention, the plurality of air columns include a first air column, a second air column and a third air column. The two sides of the first air column and the second air column are connected by the heat-sealing structure to form the receiving cavity with an opening. The third air column extends integrally from the end of the second air column and can be bent and inserted into the opening of the receiving cavity.

[0025] According to one embodiment of the present invention, the heat-sealing structure further includes a first side heat-sealing unit and a second side heat-sealing unit, the first side heat-sealing unit and the second side heat-sealing unit being formed on both sides of the first air column and the second air column, respectively, and the first side heat-sealing unit and the second side heat-sealing unit being longitudinal heat-sealing lines or intermittent heat-sealing lines.

[0026] According to one embodiment of the present invention, the heat-sealing structure further includes at least one bending heat-sealing unit and at least one folding heat-sealing unit, the bending heat-sealing unit and the folding heat-sealing unit being formed on the third air column, the third air column being divided into a lower air column segment and an upper air column segment by the bending heat-sealing unit, and the folding heat-sealing unit guiding the upper air column segment to fold inward and be inserted into the receiving cavity.

[0027] According to one embodiment of the present invention, the length of the upper air column segment is greater than or equal to the length of the lower air column segment, and the length of the upper air column segment is greater than or equal to the length of the lower air column segment.

[0028] According to an embodiment of the present invention, the heat-sealing structure further includes at least one first air column heat-sealing unit and at least one second air column heat-sealing unit, wherein the first air column heat-sealing unit divides the first air column into at least two first air column segments, and the second air column heat-sealing unit divides the second air column into at least two second air column segments, wherein the first air column segments and the second air column segments can be bent along the corresponding heat-sealing unit.

[0029] According to one embodiment of the present invention, the heat-sealing structure further includes at least two bottom heat-sealing units, the bottom heat-sealing units being formed on the first air column and / or the second air column, such that the first air column and the second air column form a bottom sealing structure.

[0030] According to one embodiment of the present invention, the heat-sealing structure further includes multiple air column heat-sealing lines, which are equally spaced on the air column and divide the air column into multiple air column units, and the air column heat-sealing lines are arranged longitudinally.

[0031] According to one embodiment of the present invention, the air column packaging bag further includes at least one inflation valve, which is disposed on both sides of the lower middle part of the air column, and the inflation valve is used to inflate the air column.

[0032] According to one embodiment of the present invention, the inflation valve is disposed at the end of the first air column.

[0033] According to one embodiment of the present invention, the air column bag body is formed by heat sealing at least two layers of air column film, the air column film including a first air column film and a second air column film disposed opposite to each other, and the heat sealing structure is formed between the first air column film and the second air column film.

[0034] According to one embodiment of the present invention, the heat-sealed edge pleats are strip-shaped or band-shaped. When the article is placed in the enclosing cavity, the inner side of the heat-sealed edge pleats abuts against the article, and the outer side abuts against the inner side of the air column.

[0035] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings.

[0036] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0037] Figure 1A This is a schematic diagram of the overall structure of an air column packaging bag with an inner lining in the open state according to a first preferred embodiment of the present invention.

[0038] Figure 1B This is a schematic diagram of the overall structure of an air column packaging bag with an inner lining in a closed state, according to a first preferred embodiment of the present invention.

[0039] Figure 2 This is a longitudinal sectional view of the air column packaging bag according to the first preferred embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram of the operation of sealing the air column packaging bag according to the first preferred embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the structure of the inner lining of the air column packaging bag according to the first preferred embodiment of the present invention. Detailed Implementation

[0042] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0043] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0044] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0045] Refer to the accompanying drawings in this application specification. Figures 1A to 4As shown, an air column packaging bag with an inner liner according to a first preferred embodiment of this application is described below. The air column packaging bag includes an air column bag body 10 and at least one inner liner 20 embedded within the air column bag body 10. The air column bag body 10 has a receiving cavity 11 for containing articles and a plurality of air columns 12 arranged around the receiving cavity 11. The plurality of air columns 12 are sequentially connected around the receiving cavity 11 to form an annular, cylindrical, or cubic receiving structure. Gas can be injected into the air columns 12, giving the air column packaging bag good cushioning performance. The inner liner 20 is adhered to the inner wall of the air columns 11 to prevent the packaged articles from directly contacting the air column bag body 10, thereby improving the dustproof, moisture-proof, and protective performance of the packaging.

[0046] The air column packaging bag further includes a heat-sealing structure 30, wherein the heat-sealing structure 30 is formed on the air column bag body 10 and the inner liner 20, wherein the inner liner 20 is bonded to the inner wall of the air column 11 by the heat-sealing structure 30, and the inner liner 20 forms a cushioning cavity 201 within the receiving cavity 11, in which the packaged item can be placed, and the air column bag body 10 and the inner liner 20 provide at least two layers of protection. It is understood that, in this preferred embodiment of the present application, the inner liner 20 is spaced between the receiving cavity 11 and the cavity 201.

[0047] It is worth mentioning that the heat-sealing structure 30 is formed on the air column bag body 10 and / or the inner covering film 20 by heat sealing, which can bond two or more film layers together to form, for example, heat-sealing lines, heat-sealing points or heat-sealing blocks.

[0048] The inner lining 20 is at least one layer of film, wherein the edge portion of the inner lining 20 is bonded to the inner side of the air column 12 by the heat-sealing structure 30 along the inner edge of the receiving cavity 11, and the remaining portion of the inner lining 20 is suspended in the receiving cavity 11.

[0049] It is worth mentioning that the inner liner 20 and the air column 12 form a cavity 11 with a gap between them. The packaged item is placed in the cavity 201 formed by the inner liner 20. The inner liner 20 and the air column 12 provide cushioning and protection for the packaged item, respectively.

[0050] Specifically, the heat-sealing structure 30 includes a fixed heat-sealing unit 31 and at least one shrink-sealing unit 32. The fixed heat-sealing unit 31 is formed on the edge of the inner liner 20 and the air column 12, and is used to bond the edge of the inner liner 20 to the air column 12, that is, to bond the inner liner 20 to the inside of the air column 12. The shrink-sealing unit 32 is formed on the inner liner 20, and is used to bond and fix a portion of the structure of the inner liner 20, forming a shrink-fitting packaging bag structure, that is, shrinking the containing cavity 201. When an item is placed into the containing cavity 201, the overall volume of the containing cavity 201 is reduced due to the heat-sealing effect of the shrink-sealing unit 32 on the inner liner 20, which is beneficial for wrapping the packaged item.

[0051] The shrink-sealing unit 32 is formed above the bottom of the containment cavity 201, and the shrink-sealing unit 32 heat-seales part of the film structure of the inner cover film 20, so that when the packaged item is placed in the containment cavity 201, the containment cavity 201 formed by the inner cover film 20 is in a tight and contracted state to prevent the packaged item from shaking.

[0052] In a specific example of this application, the heat-sealing structure 30 includes two symmetrically arranged shrink-sealing units 32, wherein the shrink-sealing units 32 are formed by heat-sealing of partially adjacent film layers of the inner liner 20 after being stretched.

[0053] Specifically, the inner cover film 20 includes a film body 21 and a film edge portion 22 extending integrally outward from the film body 21, wherein the film edge portion 22 of the inner cover film 20 is bonded to the inner side of the receiving cavity 11 by the fixing heat sealing unit 31.

[0054] The inner membrane 20 is a single-layer membrane structure, and the hammock structure it forms is achieved in the following way: the edge 22 of the inner membrane 20 is heat-sealed to the inner wall of the air column 12 along the entire inner edge of the receiving cavity 11 through a fixed heat-sealing unit 31, while the membrane body 21 of the inner membrane 20 is completely suspended within the receiving cavity 11, forming a hammock-like suspended structure without additional support. This structure utilizes the inherent tension of the membrane material to adaptively conform to the surface of irregular objects, reducing wasted space.

[0055] The film body 21 of the inner liner 20 is suspended in the receiving cavity 11 to provide cushioning and support for the packaged item. The shrink-sealing unit 32 of the heat-sealing structure 30 is formed in the film body 21, causing the overall space of the receiving cavity 201 formed by the film body 21 to be contracted, which is beneficial for wrapping and protecting the packaged item. The inner liner 20 is arranged in a hammock structure in the receiving cavity 11.

[0056] The membrane body 21 of the inner liner 20 further includes a membrane bottom 211 and a membrane connecting portion 212 integrally extending from the membrane bottom 211, wherein the membrane connecting portion 212 of the membrane body 21 connects the membrane bottom 211 and the membrane edge portion 22, and the shrink heat sealing unit 32 of the heat sealing structure 30 is formed in the membrane connecting portion 212 of the inner liner 20.

[0057] like Figure 2 As shown, the shrink-sealing unit 32 is formed on the film body 21 of the inner liner 20. The film body 21 has multiple heat-sealing edge pleats 213 with an embossed structure around the periphery corresponding to the shrink-sealing unit 32. These heat-sealing edge pleats 213 extend outward from the shrink-sealing unit 32 along the film body 21. It should be noted that the heat-sealing edge pleats 213 formed on the film body 21 by the shrink-sealing unit 32 increase the internal and external resistance of the containing cavity 201, thereby increasing the inner liner 20's ability to enclose the packaged item, preventing the packaged item from rotating or shaking within the containing cavity 201, and improving the stability of the air column packaging bag.

[0058] The shrink-sealing heat-sealing unit 32 is a heat-sealing structure formed at the membrane connection 212 by heat sealing a part of the membrane body 21 under tension.

[0059] The shrink-sealing heat-sealing unit 32 consists of two symmetrically arranged heat-sealing structures. Specifically, it is formed by stretching adjacent film layers in the film body 21 of the inner covering film 20 to a taut state along the transverse or longitudinal direction and then heat-sealing them. After heat-sealing, the inner covering film 20 generates a pre-tension force towards the center due to the two symmetrical constraints, which can prevent the item from swaying left and right in the horizontal direction. Combined with the suspension tension of the film body 21, it forms an integrated effect of wrapping and constraining the item, solving the problem in the prior art that relying solely on external air columns cannot suppress internal inertial motion.

[0060] In a specific example of this application, the shrink-sealing unit 32 is formed by heat sealing a portion of the membrane body 21 under a lateral tension perpendicular to the air column direction. The heat-sealing edge wrinkles 213 are concave-convex structures extending laterally from the shrink-sealing unit 32 along the membrane body 21. That is, the shrink-sealing unit 32 is formed by heat sealing a portion of the membrane body 21 under lateral tension, and concave-convex heat-sealing edge wrinkles 213 are formed on both sides of the heat-sealing unit 32 in the lateral direction.

[0061] In another specific example of this application, the shrink-sealing heat-sealing unit 32 is formed by heat sealing a portion of the membrane body 21 under tension in the longitudinal direction parallel to the air column direction. The heat-sealing edge wrinkles 213 are concave-convex structures extending longitudinally from the shrink-sealing heat-sealing unit 32 along the membrane body 21. That is, the shrink-sealing heat-sealing unit 32 is formed by heat sealing a portion of the membrane body 21 under tension in the longitudinal direction, and concave-convex heat-sealing edge wrinkles 213 are formed on both sides of the heat-sealing unit 32 in the longitudinal direction.

[0062] In a specific example of this application, the shrink-sealing heat-sealing unit 32 is formed by heat-sealing a portion of the membrane body 21 while it is being stretched towards the center of the shrink-sealing heat-sealing unit. The heat-sealing edge wrinkles 213 are convex-concave structures extending radially from the shrink-sealing heat-sealing unit 32 along the membrane body 21. That is, the shrink-sealing heat-sealing unit 32 is formed by heat-sealing a portion of the membrane body 21 stretched towards a central location, and convex-concave heat-sealing edge wrinkles 213 are formed around the periphery of the heat-sealing unit 32.

[0063] It is understood that the location of the heat-sealing unit 32 and the specific shape of the heat-sealing edge folds 213 are merely exemplary and not limiting.

[0064] It is worth mentioning that the heat-sealing edge folds 213 formed by the shrink-sealing unit 32 on the membrane body 21 are strip-shaped or band-shaped membrane layer structures.

[0065] It is understood that the heat-sealing pleats 213 formed on the membrane body 21 present an uneven membrane structure extending outward from the shrink heat-sealing unit 32. When the packaged item is placed in the containment cavity 201, the inner side of the heat-sealing pleats 213 abuts against the packaged item, the outer side of the heat-sealing pleats 213 abuts against the inner side of the air column 12, and the heat-sealing pleats 213 prevent the packaged item from rotating or moving within the containment cavity 201, thereby improving the protective effect of the packaged item.

[0066] It should be noted that the initial area of ​​the inner lining 20 is larger than the bottom area of ​​the receiving cavity 11. The shrink-sealing heat-sealing unit 32 heat-seals the film connection portion 212 of the inner lining 20 in a pre-stretched state, forming permanent pre-stress. When an item is placed inside, the bottom 211 of the elastic film sinks under gravity, triggering the heat-sealed edge folds 213 to unfold outwards, generating radial tension and keeping the item in a dynamically wrapped state. This design is particularly suitable for irregular items with a shifted center of gravity, automatically adjusting the direction of the restraint force.

[0067] As an example, in a specific example of this application, the heat-sealing edge pleats 213 formed by the shrink-sealing unit 32 extend upward from the shrink-sealing unit 32 to the film body connection portion 212 and downward to the bottom 211 of the film body. That is, the shrink-sealing unit 32 makes the film body 21 in a pre-tightened state. When the packaged item is placed in the containing cavity 201, the film body 21 of the inner covering film 20 is in a taut state, and the heat-sealing edge pleats 213 formed on the film body 21 also provide the effect of preventing the packaged item from moving or rotating.

[0068] like Figure 2 and Figure 3 As shown, the air column 12 includes a first air column 121, a second air column 122 and a third air column 123, wherein the first air column 121, the second air column 122 and the third air column 123 are an integral structure, and the first air column 121 extends from one end of the second air column 122 and the third air column 123 extends from the other end of the second air column 122.

[0069] The heat-sealing structure 30 is formed on the first air column 121, the second air column 122 and the third air column 123 of the air column 12, and the heat-sealing structure 30 connects the first air column 121, the second air column 122 and the third air column 123 to form an air column bag structure suitable for packaging the packaged item.

[0070] Specifically, the two sides of the first air column 121 are respectively connected to the two sides of the second air column 122, forming the receiving cavity 11 with an opening. The first side of the first air column 121 is connected to the first side of the second air column 122, and the second side of the first air column 121 is connected to the second side of the second air column 122. As an example, in a specific example of this application, the first air column 121 and the second air column 122 form a square bag structure. It is understood that the specific shape of the bag is merely an example and not a limitation.

[0071] The heat-sealing structure 30 includes a first side heat-sealing unit 33 and a second side heat-sealing unit 34, wherein the first side heat-sealing unit 33 is formed on the first side of the first air column 121 and the second air column 122, and the second side heat-sealing unit 34 is formed on the second side of the first air column 121 and the second air column 122. As an example, the first side heat-sealing unit 33 and the second side heat-sealing unit 34 are implemented as longitudinal or vertical heat-sealing lines or intermittent heat-sealing lines.

[0072] The heat-sealing structure 30 further includes at least one first air column heat-sealing unit 35 and at least one second air column heat-sealing unit 36. The at least one first air column heat-sealing unit 35 is formed on the first air column 121, dividing the first air column 121 into at least two interconnected first air column segments. The at least two first air column segments can be bent along the first air column heat-sealing unit 35 to form a specific desired structure or shape. The at least one second air column heat-sealing unit 36 ​​is formed on the second air column 122, dividing the second air column 122 into at least two interconnected second air column segments. The at least two second air column segments can be bent along the second air column heat-sealing unit 36 ​​to form a specific desired structure or shape.

[0073] It is understood that the first air column heat sealing unit 35 and the second air column heat sealing unit 36 ​​may be, but are not limited to, transverse or longitudinal heat sealing lines or heat sealing sections.

[0074] The heat-sealing structure 30 further includes at least two bottom heat-sealing units 37, wherein the bottom heat-sealing units 37 are formed on the first air column 121 and / or the second air column 122, and after being heat-sealed by the bottom heat-sealing units 37, the first air column 121 and the second air column 122 form a bottom sealing mechanism.

[0075] It is worth mentioning that the first air column 121 and the second air column 122 are bent after being heat-sealed by the heat-sealing structure 30 to form an air column packaging bag with an opening at the top.

[0076] The third air column 123 extends integrally from the end of the second air column 122, wherein the third air column 123 can be bent and inserted into the opening formed by the first air column 121 and the second air column 122, serving as the lid of the air column packaging bag.

[0077] The heat-sealing mechanism 30 further includes at least one bending heat-sealing unit 38 and at least one folding heat-sealing unit 39, wherein the at least one bending heat-sealing unit 38 and the at least one folding heat-sealing unit 39 are formed in the third air column 123. The third air column 123 can be bent along the bending heat-sealing unit 38 and folded along the folding heat-sealing unit 39 to insert the third air column 123 into the receiving cavity formed by the first air column 121 and the second air column 122.

[0078] In this preferred embodiment of the present application, the bending heat sealing unit 38 is implemented as two transverse heat sealing lines, which divide the third air column 123 into at least two interconnected air column segments.

[0079] Specifically, the third air column 123 is divided into a lower air column segment 1231 and an upper air column segment 1232 by the bending heat-sealing unit 38. The upper air column segment 1232 is bent to fit into the receiving cavity, and the lower air column segment 1231 covers the opening of the receiving cavity. It is worth mentioning that the lower air column segment 1231 is connected to the second air column 122, that is, the lower air column segment 1231 is located between the upper air column segment 1232 and the second air column 122.

[0080] Preferably, the length of the upper air column segment 1232 is greater than or equal to the length of the lower air column segment 1231, so that a longer air column can be inserted into the receiving cavity to improve stability. In addition, when the upper air column segment 1232 is inserted into the receiving cavity, the upper air column segment 1232 can provide cushioning and support for the packaged item in the receiving cavity, thereby preventing the item from moving.

[0081] The folded heat-sealing unit 39 is formed between the two bent heat-sealing units 38, and the folded heat-sealing unit 39 is located on both sides of the third air column 123. The third air column 123 can be folded along the folded heat-sealing unit 39 so that the folded third air column 123 can be inserted into the receiving cavity 11.

[0082] As an example, in this preferred embodiment of the present application, the folding heat-sealing unit 39 has a “《》” or “<>” type structure. When folded, the air column units on both sides of the third air column 123 are flipped and folded inward along the folding heat-sealing unit 39, so that the upper air column section 1232 of the third air column 123 is suitable for being inserted into the receiving cavity.

[0083] The third air column 123 adopts a heat-sealing line structure similar to the " " type, namely the folded heat-sealing unit 39. This structure guides the bending direction of the air column through symmetrical inclined heat-sealing lines on both sides, so that the upper air column section 1232 of the third air column 123 can be precisely folded and inserted into the receiving cavity 11. Further specified, the length of the upper air column section 1232 is at least 10% longer than the lower air column section 1231. Its length design not only ensures a tight fit with the inner wall of the receiving cavity after insertion to stabilize the structure, but also utilizes the elastic deformation of the air column after inflation to hold the top of the item vertically, forming a three-dimensional stable system with the horizontal constraint of the inner covering film 20, jointly suppressing the up-down, left-right and rotational shaking of the item.

[0084] It should be noted that when inserted, the interference of the upper air column section 1232 compresses the heat-sealed folds 213 of the inner lining membrane 20, forcing the folds to unfold and increase the contact area with the item, forming a dual locking mechanism of 'rigid air column support + elastic membrane wrapping'.

[0085] The heat-sealing structure 30 further includes multiple air column heat-sealing lines 310, wherein the air column heat-sealing lines 310 are equally spaced on the air column 12, and the air column heat-sealing lines 310 divide the air column 12 into multiple air column units. In this preferred embodiment of the present application, the air column heat-sealing lines 310 are arranged longitudinally, and the formed air column unit is a longitudinally extending air column structure.

[0086] It should be noted that the air column bag body 10 adopts a multi-segment heat sealing and bending integrated design on both sides: the two sides of the air column 12 are sealed by the first side heat sealing unit 33 and the second side heat sealing unit 34 to form a rigid support frame; at the same time, the air column 12 has multiple discontinuous heat sealing lines along its length, so that the air column can be flexibly bent along the heat sealing lines to adapt to the needs of accommodating items of different sizes.

[0087] like Figure 2 As shown, the air column packaging bag is a packaging bag structure formed by at least two layers of air column film through a series of heat seals. The air column packaging bag includes a first air column film 110 and a second air column film 120, wherein the first air column film 110 and the second air column film 120 are arranged opposite to each other, and the heat sealing mechanism 30 is formed on the first air column film 110 and the second air column film 120 to form the air column 12.

[0088] The air column packaging bag further includes at least one inflation valve 40, which is disposed on the air column 12, and inflation is performed on the air column 12 through the at least one inflation valve 40.

[0089] It should be noted that the inflation valve 40 is not located at the top of the bag body, but rather on both sides of the lower middle part of the air column 12. Preferably, the inflation valve 40 is located at the end of the first air column 121 of the air column 12. This position design allows the gas to be filled more evenly into each air column unit, ensuring consistent overall cushioning performance of the air column 12. At the same time, inflation in the lower middle part avoids bending difficulties caused by over-inflation of the upper air column, ensuring the stability of the insertion of the third air column 123.

[0090] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. An air column packaging bag with an inner liner, characterized in that, include: An air column bag body, the air column bag body having a receiving cavity and a plurality of air columns arranged around the receiving cavity, the plurality of air columns being connected in sequence to form a packaging bag structure; At least one inner lining membrane is embedded in the air column bag body; A heat-sealing structure is formed on the air column bag body and the inner lining film. The inner lining film is bonded to the inner wall of the air column through the heat-sealing structure and forms an enclosing cavity within the receiving cavity. The heat-sealing structure includes a fixed heat-sealing unit and at least one shrink-sealing unit. The fixed heat-sealing unit bonds the edge of the inner liner to the inside of the air column, and the shrink-sealing unit is formed on the inner liner and makes the enclosing cavity taut and contracted.

2. The air column packaging bag according to claim 1, characterized in that, The inner liner is a single-layer membrane structure, comprising a membrane body and a membrane edge portion integrally extending from the membrane body. The membrane edge portion is heat-sealed to the air column along the inner edge of the receiving cavity by the fixed heat-sealing unit. The membrane body is suspended in the receiving cavity to form a hammock-like suspension structure.

3. The air column packaging bag according to claim 2, characterized in that, The membrane body includes a membrane bottom and a membrane connecting portion, the membrane connecting portion connecting the membrane bottom and the membrane edge portion, and the shrink heat sealing unit is formed in the membrane connecting portion.

4. The air column packaging bag according to claim 1, characterized in that, The shrink-sealing unit consists of two symmetrically arranged heat-sealing structures. The shrink-sealing unit is formed by heat-sealing a portion of the adjacent film layers of the inner liner after stretching them to a taut state.

5. The air column packaging bag according to claim 4, characterized in that, The membrane body forms multiple heat-sealing edge pleats around the shrink-sealing unit, and the heat-sealing edge pleats extend outward from the shrink-sealing unit along the membrane body in a concave-convex structure.

6. The air column packaging bag according to claim 5, characterized in that, The heat-sealed edge pleats extend laterally, longitudinally, or radially, with the lateral direction being perpendicular to the air column and the longitudinal direction being parallel to the air column.

7. The air column packaging bag according to claim 1, characterized in that, The initial area of ​​the inner lining is larger than the bottom area of ​​the receiving cavity. The shrinking heat-sealing unit causes the inner lining to form permanent prestress. When the item is placed in the receiving cavity, the bottom of the inner lining sinks under the action of gravity and triggers the unfolding of the heat-sealed edge wrinkles.

8. The air column packaging bag according to claim 1, characterized in that, The plurality of air columns include a first air column, a second air column, and a third air column. The two sides of the first air column and the second air column are connected by the heat-sealing structure to form the receiving cavity with an opening. The third air column extends integrally from the end of the second air column and can be bent and inserted into the opening of the receiving cavity.

9. The air column packaging bag according to claim 8, characterized in that, The heat-sealing structure further includes a first side heat-sealing unit and a second side heat-sealing unit, which are respectively formed on both sides of the first air column and the second air column. The first side heat-sealing unit and the second side heat-sealing unit are longitudinal heat-sealing lines or intermittent heat-sealing lines.

10. The air column packaging bag according to claim 8, characterized in that, The heat-sealing structure further includes at least one bending heat-sealing unit and at least one folding heat-sealing unit, the bending heat-sealing unit and the folding heat-sealing unit are formed on the third air column, the third air column is divided into a lower air column segment and an upper air column segment by the bending heat-sealing unit, and the folding heat-sealing unit guides the upper air column segment to fold inward and insert into the receiving cavity.

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