CN106144227B

CN106144227B - Square fluid packaging device

Info

Publication number: CN106144227B
Application number: CN201610618955.2A
Authority: CN
Inventors: 聂会平
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2020-09-08
Anticipated expiration: 2036-07-29
Also published as: CN106144227A

Abstract

A square fluid packing device for cushioning at least one object to be packed with fluid, comprising: the fluid packaging main body is formed by plastically connecting a series of plane plastic sealing seams and three-dimensional plastic sealing seams, wherein the fluid packaging main body comprises a plurality of fluid storage units, each fluid storage unit is bent to form a plurality of communicated sub-fluid storage units, the sub-fluid storage units form at least one peripheral wall, at least one bottom wall and two folding walls after the fluid packaging main body is filled with fluid, the peripheral wall and the bottom wall form a square containing cavity, and the two folding walls are suitable for being folded on the peripheral wall or the bottom side and form a flat plane on the side surface or the bottom surface.

Description

Square fluid packaging device

Technical Field

The invention relates to an air-packing device, in particular to a square fluid packing device.

Background

In modern logistics, the most widely used are packaging boxes (boxes). However, the conventional package does not provide the function of preventing collision and falling. That is, the packing box or case is thrown away during transportation or storage, easily causing deformation thereof, and thus possibly causing damage to or deformation of the packed item. Therefore, for some articles with high packaging requirements, such as electronic digital products, plastic ceramics, biochemical products, food and medicine, etc., it is necessary to provide a buffering function for the packaged articles to prevent the packaged articles from being damaged during transportation and storage. Existing solutions, such as traditional paper packaging boxes, may be to fill the interior of the paper packaging box with a cushioning material, such as a foam material, to achieve the purpose of providing cushioning. However, the cost of shipping and storing such packages and filled cushioning materials is very expensive when they are shipped to the packaging site. And the buffering foam material pollutes the environment and is not environment-friendly.

Another improvement is the presently available air-filled package formed from four films through a series of heat-sealing processes, wherein the two outer films form an inflatable chamber therebetween and the two inner films form a one-way fluid-filled valve for inflating a corresponding inflatable chamber and preventing the escape of air from the inflatable chamber. Wherein two-layer outer film forms the chamber that holds that can hold packing article through a series of folding back, like this, packing article can receive gas packaging bag's buffering in each side to prevent that external impact stress from acting on to packing article, thereby prevent packing article's damage. However, the single-layer type air packing bag formed by two outer films still has limited cushioning performance, for example, when one side wall of the air packing bag is impacted, air in the air packing bag cannot be effectively dispersed, and the side wall of the air packing bag cannot be timely restored to the shape, so that impact stress is locally excessively concentrated, and the stress is transmitted to the packed article, thereby causing damage to the packed article.

In order to realize a three-dimensional structure with a certain specific shape, the other inflatable packaging bags are provided with side wings after inflation is finished, and the side wings ensure a certain buffering effect, but protrude out of the surfaces of other parts of the inflatable packaging bags, so that extra space is occupied. In the in-process of transportation and storage, because the existence of flank, the extra space between each inflatable packaging bag causes can not closely laminate each other, has both increased the unnecessary space, has reduced stability moreover, and the influence is to the packing object that holds in the inflatable packaging bag effect of buffering. In addition, when the packaging bags with the side wings are matched with other packaging bags for use, the packaging bags cannot be tightly attached, extra space is added, and the buffering effect is influenced.

Disclosure of Invention

The invention aims to provide a square fluid packaging device, which can ensure the flatness of the outer wall of the square fluid packaging device while providing a buffering effect, can be attached to the surface of a packaged article or other types of packaging devices, and enhances the stability.

Another object of the present invention is to provide a square fluid packaging device, which has a folded wall, and the surface of the folded wall and the surface of the side wall or the bottom wall of the square fluid packaging device can form a flat integral plane, so as to provide a cushioning effect, and at the same time, ensure the flatness of the outer wall of the square fluid packaging device, and can be attached to the surface of a packaged article or other types of packaging devices, thereby enhancing the stability.

Another object of the present invention is to provide a square fluid-packing device having a folding wall which does not occupy additional space, thereby improving stability during transportation, storage, use, etc. of the square fluid-packing device.

Another object of the present invention is to provide a square fluid packing device having a folding wall which does not occupy additional space, thereby improving stability of packed items in the square fluid packing device and enhancing a cushioning effect.

Another object of the present invention is to provide a square fluid packing device having a folding wall which does not occupy additional space, thereby making it possible to fully utilize the accommodation space of the square fluid packing device.

In order to achieve the above object, the present invention provides a square fluid packing device for cushioning at least one object to be packed with fluid, comprising: the fluid packaging main body is formed by plastically connecting a series of plane plastic sealing seams and three-dimensional plastic sealing seams, and comprises a plurality of fluid storage units, wherein each fluid storage unit is bent to form a plurality of communicated sub-fluid storage units, the sub-fluid storage units form at least one peripheral wall and at least one bottom wall after the fluid packaging main body is filled with fluid, and the peripheral wall and the bottom wall form a square containing cavity for packaging the to-be-packaged object.

In some embodiments, the folding wall is located at two ends of the bottom wall, wherein the two folding walls are suitable for being respectively overlapped with the peripheral wall.

In some embodiments, the two folded walls are adapted to form flat planes on the sides of the fluid packaging body when being folded on the peripheral wall.

In some embodiments, the peripheral wall forms an overlap in a position corresponding to the overlap of the folded walls, the overlap having a smaller thickness with respect to the remainder of the peripheral wall.

In some embodiments, the overlap portion has a smaller diameter of the sub fluid storage unit relative to the remaining portion of the peripheral wall.

In some embodiments, the two folded walls are adapted to be respectively folded on the outer sides of the peripheral wall and respectively form flat planes on the outer side surfaces of the fluid packaging main body when being folded with the folding parts of the peripheral wall.

In some embodiments, the two folding walls are respectively overlapped on the inner sides of the peripheral walls and positioned in the containing cavity.

In some embodiments, the folding wall is located at two ends of the bottom wall, wherein the folding walls are suitable for being respectively overlapped with the bottom wall.

In some embodiments, the two folding walls are adapted to form a flat plane on the bottom side of the fluid package body when folded on the bottom wall.

In some embodiments, the bottom wall forms an overlap in a position corresponding to the overlap of the folded walls, the overlap having a reduced thickness with respect to the remainder of the bottom wall.

In some embodiments, the overlap portion has a smaller diameter of the sub-fluid storage unit relative to the remainder of the bottom wall.

In some embodiments, when the two folded walls are overlapped with the overlapping portion of the bottom wall, the two folded walls are adapted to be respectively overlapped on the outer sides of the bottom wall and respectively form flat planes on the bottom side of the fluid packaging main body.

In some embodiments, the two folding walls are respectively overlapped on the inner side of the bottom wall and positioned in the containing cavity.

In some embodiments, it further comprises at least one top wall for sealing the opening of the receiving cavity.

In some embodiments, the peripheral wall, the bottom wall, and the folded wall are integrally formed.

In some embodiments, the top wall, the bottom wall, the peripheral wall, and the folded wall are integrally formed.

In some embodiments, each of the folded walls is formed by folding two portions.

In some embodiments, each of the folded walls is triangular.

In some embodiments, each of the folded walls is arranged in a staggered stack with the sub-fluid storage units of the corresponding lamination portion

In some embodiments, the fluid packaging body is formed from a first fluid storage film and a second fluid storage film by a heat sealing and folding process, the fluid packaging body forms at least one fluid inlet and at least a main channel, and at least one fluid filling valve is disposed in the fluid packaging body, fluid enters the main channel from the fluid inlet, and enters each of the fluid storage units from the main channel via the fluid filling valve.

In some embodiments, the fluid filling valve includes two valve films heat-sealed to the first fluid storage film and the second fluid storage film of the fluid packaging body, respectively, at least one fluid passage is formed between the two valve films, and inner surfaces of the two valve films automatically adhere to each other when the fluid storage unit is filled with fluid through the fluid passage, so as to prevent fluid entering the fluid storage unit from reversely permeating through the fluid passage.

Drawings

Fig. 1 is a schematic view showing an unfolded state of a square fluid-packing device according to a preferred embodiment of the present invention when it is not inflated.

Fig. 2 is a perspective view showing a finished product after the square fluid-packing device according to the above preferred embodiment of the present invention is folded and heat-sealed.

Fig. 3 is a schematic perspective view of a square fluid-packing device according to the above preferred embodiment of the present invention.

Fig. 4 is a perspective view showing the square-shaped fluid packing device according to the above preferred embodiment of the present invention being placed in a packing bag of another type.

Fig. 5 is a schematic view showing the construction of a bottom wall and a folding wall of the square fluid-packing device according to the above preferred embodiment of the present invention.

Fig. 6 is a schematic side perspective view of a square fluid-packing device according to the above preferred embodiment of the present invention.

Fig. 7 is a partially enlarged schematic view of fig. 6.

Fig. 8 is a schematic view showing a developed state of a square fluid-packing device when it is not inflated according to a modified embodiment of the above preferred embodiment of the present invention.

Fig. 9 is a perspective view showing a finished product after the square fluid-packing device according to the above-described embodiment of the present invention is folded and heat-sealed.

Fig. 10 is a schematic perspective view of a square fluid-packing device according to the above-described embodiment of the present invention.

Fig. 11 is a schematic perspective view showing the square-shaped fluid packing device according to the above-described embodiment of the present invention being placed in a packing bag of another type.

Fig. 12 is a schematic side perspective view of a square fluid-packing device according to the above-described embodiment of the present invention.

Fig. 13 is a partially enlarged schematic view of fig. 12.

Fig. 14A is a schematic structural view of a one-way fluid filling valve of the square fluid packing device according to the above-described embodiment of the present invention.

Fig. 14B is a schematic structural view of a one-way fluid filling valve of the square fluid packing device according to the above-described embodiment of the present invention.

Fig. 14C is a schematic structural view of the one-way fluid filling valve of the square fluid packing device according to the above-described embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 7, there is shown a square fluid packing device according to a preferred embodiment of the present invention, which has an inflatable structure for providing a gas buffering effect to various packing articles such as electronic products, foods, medical products, chemical materials, biomaterials, plastic ceramics, fast consumer goods, etc. after being inflated, and is convenient to store and transport without being filled with a fluid when not in use and to fill with a fluid on site when in use, thereby being very convenient to use. Since the fluid packing bag has fluid cushioning properties, it is suitable for providing a fluid cushioning effect to the article to be packed. It will be understood by those skilled in the art that the above-mentioned objects to be packaged are not limited to the examples given herein, and the square fluid packaging device of the present invention can be applied to the packaging of other objects according to the actual needs. The medium for providing a cushioning effect of the square fluid packaging device according to the present invention is a fluid, such as gas, liquid, or the like. In this preferred embodiment of the present invention, the square-shaped fluid-packing device may be implemented as an air cushion material, i.e., the inflated gas is exemplified by air. Of course, it will be appreciated by those skilled in the art that other fluids are possible in the application as desired. In this preferred embodiment, it is inflated to form a three-dimensional package, thereby providing an air cushioning effect to a packaged item.

In the forming process of the square fluid packaging device, in order to form a square three-dimensional shape, the square fluid packaging device provided by the invention is provided with at least one bottom folding wall, and the bottom folding wall can not only ensure the square three-dimensional configuration of the square fluid packaging device and provide a multi-level buffering effect for the packaged articles, but also can ensure the flatness of the side wall where the bottom folding wall is located. That is, the bottom folded wall forms a plane that does not project beyond the side wall. Therefore, in transportation or storage, extra space cannot be increased among the square fluid packaging devices due to the existence of the folding walls at the bottoms, the square fluid packaging devices are arranged more tightly, the respective buffering effect cannot be influenced, and the space can be saved. In addition, when the square fluid packing device needs to be contained in other types of packing bags, the existence of the bottom folding wall does not affect the fitting degree of the outer wall of the square fluid packing device and the inner wall of the other types of packing bags. That is to say, square fluid packaging device is when maintaining the configuration and providing multistage buffering effect, and the outer wall can laminate the inner wall of other types of wrapping bags well, can not influence respective buffering effect, also can save space. The bottom folding wall will be clearly disclosed in detail in the following embodiments.

Specifically, in the above preferred embodiment, the square fluid packaging device includes at least one fluid buffering body 10, that is, one three-dimensional packaging bag is formed by one fluid buffering body 10 or a plurality of fluid buffering bodies 10 are plastically connected, such as bonded or heat-sealed, to form the three-dimensional packaging bag. In the example of the invention shown in fig. 1 to 7, it is formed by one of said fluid cushion bodies 10. More specifically, referring to fig. 1, 2 and 14A, the fluid buffering body 10 includes at least two

fluid storage films

11 and 12 formed into the three-dimensional packaging bag including one or more connected fluid storage units 13 through a series of planar plastic sealing seams 30 and three-dimensional plastic sealing seams 40, wherein each fluid storage unit 13 forms a fluid storage chamber 14 for storing fluid therein.

It will be understood by those skilled in the art that the planar plastic-sealing seam 30 is used for plastic-sealing the multi-layer film to form a planar cushioning material as shown in fig. 1, and the three-dimensional plastic-sealing seam 40 is used for further plastic-sealing the planar cushioning material to form the square fluid packaging device into the three-dimensional packaging device having a square spatial three-dimensional configuration and capable of accommodating the packaged article, as shown in fig. 2. The planar plastic seam 30 and the three-dimensional plastic seam 40 may be formed by bonding or heat-sealing the multilayer films together, and preferably, in this preferred embodiment, the planar plastic seam 30 and the three-dimensional plastic seam 40 may be formed by a heat-sealing process.

More specifically, as shown in fig. 1, the planar plastic sealing seam 30 includes a plurality of rows of dividing seams 31 that divide the two

fluid storage films

11 and 12 into a plurality of fluid storage cells 13. That is, it is preferable that each row of the separation slits 31 is formed through a heat-sealing process that heat-seals two layers of the

fluid storage films

11 and 12, thereby forming one row of the separation slits 31 between adjacent two fluid storage units 13. The separation seam 31 may be a continuous heat seal line so that a plurality of the fluid storage units 13 are independent of each other. In this way, when one of the fluid storage units 13 is damaged to leak fluid, the other fluid storage units 13 may not be affected. Of course, it should be noted that the fluid storage units 13 may also be in communication with each other, such that only one fluid filling valve 20 is required to fill all of the fluid storage units 13 with fluid. That is, the square fluid packing device of the present invention can form a plurality of the fluid storage cells 13 by heat-sealing the first fluid storage film 11 and the second fluid storage film 12.

It is understood that, as shown in fig. 1, the top and bottom rows of the separation slits 31 may be the top and bottom boundary slits of the fluid buffering body 10, respectively. It is worth mentioning that the top side and the bottom side are relative concepts, which are defined according to the relative position of the square fluid packing device to the horizontal line. That is, the separation slit 31 of the square fluid packing device is defined as a top side and a top side when it is relatively perpendicular to the horizontal line, but is defined as a left side and a right side when the separation slit 31 of the square fluid packing device is relatively parallel to the horizontal line. The separation seam 31 may be an intermittent heat seal line so that a plurality of the fluid storage units 13 communicate with each other. The fluid storage unit 13 may have various shapes such as a bar shape, a circular shape, a polygonal shape, or other irregular shapes. As shown in fig. 1 to 7, the fluid cushion body 10 of the present invention may include a plurality of inflatable pillars of the same size arranged side by side when implemented as an inflatable material, and the fluid cushion body 10 of the present invention may also include a plurality of inflatable pillars of different sizes arranged side by side. In addition, the arrangement of the large and small air columns may be varied, for example, they may be arranged alternately, small air columns may be formed in some areas, and the invention is not limited in this respect.

In the above preferred embodiment, as shown in fig. 14A to 14C, the structure of the fluid filling valve 20 of the square fluid packaging apparatus of the present invention is schematically shown. Referring to fig. 14A, the air-packing device further includes a fluid filling valve 20 formed of at least two

valve films

21 and 22, the

valve films

21 and 22 of the fluid filling valve 20 and the

fluid storage films

11 and 12 are disposed to overlap each other, and a fluid passage 23 for filling the fluid storage chamber 14 with air is formed between the

valve films

21 and 22. It is understood that the

valve films

21 and 22 are shorter in length than the

fluid storage films

11 and 12. When the fluid storage chamber 14 is filled with fluid through the fluid passage 23, such as by inflation, and the air pressure in the fluid storage chamber 14 reaches a predetermined requirement, the air pressure in the fluid storage chamber 14 acts on the

valve films

21 and 22 to cause the

valve films

21 and 22 to adhere to one of the fluid storage films, thereby closing the fluid passage 23 so that the fluid filling valve 20 functions as a one-way valve. When at least one fluid channel 23 is formed in each fluid storage unit 13 and the fluid storage units 13 are independent of each other, when one of the fluid storage units 13 is damaged and leaks air, the other fluid storage units 13 are not affected and can play an air buffering effect. As shown in fig. 14B, the fluid filling valve 20 may further include adding a valve membrane 25 between the two

valve membranes

21 and 22 for enhancing sealing performance. As shown in fig. 14C, the fluid filling valve 20 may further include a valve membrane 26 between the fluid storage membrane 12 and the valve membrane 22, i.e., outside the two

valve membranes

21 and 22, so as to prevent the joint between the valve membrane 22 and the fluid storage membrane 12 from being torn, thereby enhancing the stable joint. It will be appreciated that the specific configuration of the fluid filling valve 20 described above is by way of example only and is not limiting to the present invention. In other variant embodiments, it may also be other mechanical valves.

It is understood that the

fluid storage films

11 and 12 of the fluid buffering body 10 and the

valve films

21 and 22 of the fluid filling valve 20 may be made of various suitable film materials, such as polyethylene film, polypropylene film, polyvinyl chloride film, polyester film, polystyrene film or composite film, etc., and the present invention is not limited in this respect as long as it is a suitable flexible film. It is worth mentioning that the

valve membranes

21 and 22 of the fluid filling valve 20 may also be self-adhesive films modified by adding chemical components to the above films in order to increase the one-way sealing effect.

The fluid buffering body 10 further includes a main channel unit 15 connected to each of the fluid storage units 13, preferably integrally extended from each of the fluid storage units 13. More specifically, in one embodiment, the main channel unit 15 is perpendicular to the extending direction of the fluid storage unit 13. For example, in one embodiment, each of the fluid storage units 13 extends in a longitudinal direction, and the main channel unit 15 extends in a transverse direction. The main passage unit 15 forms a main passage 151, and the main passage 151 has a fluid inlet 152, when the fluid inlet 152 is positioned with an air charging nozzle and performs an air charging operation, air enters the main passage 151 from the fluid inlet 152 in a transverse direction and enters each of the fluid storage units 13 in a longitudinal direction, and when a predetermined air pressure is reached in each of the fluid storage chambers 14, the

valve films

21 and 22 of the fluid filling valve 20 are attached to one of the

fluid storage films

11 or 12, thereby achieving self-sealing to prevent the charged air from re-permeating into the main passage 151.

It is understood that the main passage unit 15 may be formed of two layers of the

fluid storage films

11 and 12, two layers of the

valve films

21 and 22, or one of the

fluid storage films

11 or 12 and one of the

valve films

21 or 22.

As shown in fig. 1, the planar plastic sealing seam 30 further includes a continuously sealed side sealing seam 32 and a continuously sealed main channel sealing seam 33 respectively located at the left and right sides of the fluid buffering body 10, wherein the main channel 151 is formed between the side sealing seam 32 at the left side and the main channel sealing seam 33 at the left side. It is to be understood that the side sealing seams 32 are formed by a plastic molding process such as bonding or heat sealing and hermetically connect the two

fluid storage films

11 and 12, and the main channel sealing seams 33 are formed by a plastic molding process such as bonding or heat sealing and connect the two

fluid storage films

11 and 12 and the two

valve films

21 and 22, respectively, as shown in fig. 14A to 14C, and the main channel sealing seams 33 formed at the upper and lower sides, for example, by one heat sealing process, respectively heat-seal the fluid storage film 11 and the valve film 21 at positions corresponding to the fluid channels 23, and heat-seal the fluid storage film 12 and the valve film 22 at other positions integrally heat-seal the multi-layered films and divide the fluid buffer 10 into the main channel unit 15 and the fluid storage unit 13.

As shown in fig. 14A to 14C, each of the fluid storage units 13 is in a position adjacent to the main passage 151, and the

valve films

21 and 22 are further heat-sealed to the fluid storage film 11 by a plurality of connecting seams 35, so that when a predetermined air pressure is reached in the fluid storage chamber 14, the air pressure acts on the

valve films

21 and 22, and is simultaneously pressed toward the fluid storage film 11 and finally attached to the fluid storage film 11 due to the provision of a connecting seam 35, thereby closing the fluid passage 23. That is, the joining seam 35 heat-seals two layers of the

valve films

21 and 22 and one layer of the fluid storage film 11. In addition, as shown in fig. 14A to 14C, the shape of each of the connecting slits 35 is designed such that it further functions to prevent gas from flowing back, that is, when gas in the fluid storage chamber 14 is desired to flow back, it is blocked by the connecting slit 35 and cannot easily permeate back into the main channel 151. In addition, in heat-sealing these planar plastic seams 30, the fluid passages 23 of the

valve films

21 and 22 of the fluid-filled valve 20 may be formed by providing a heat-resistant barrier means that is removed after the heat-sealing process. In one embodiment, a heat resistant layer 24, such as heat resistant ink, is disposed between the

valve films

21 and 22 of the fluid filling valve 20, as shown in fig. 14A to 14C, and is communicated against the main channel 151 without closing its inlet port by heat sealing. In one embodiment, the main channel 151 is formed by two

fluid storage films

11 and 12, the heat-resistant layer 24 and the

valve films

21 and 22 each have an extension entering the main channel 151, the planar plastic sealing seam 30 further includes a row of mutually spaced and longitudinally arranged joint seams 36 corresponding to the position of the extension of the heat-resistant layer 24, because of the arrangement of the heat-resistant layer 24, the joint seams 36 connect the two

fluid storage films

11 and 12 and the two

valve films

21 and 22 respectively, and the two

valve films

21 and 22 are not heat-sealed, and the arrangement of the joint seams 36 is such that after the fluid cushion body 10 is inflated and gas enters the main channel 151, the

adjacent valve films

21 and 22 and the correspondingly connected

fluid storage films

11 and 12 can expand together to open the corresponding fluid channel 23.

The fluid storage units 13 at both ends of the fluid cushion body 10 are folded and connected by end plastic seams 41. A terminal edge 38 is arranged outside the terminal plastic sealing seam 41. The end pinch seal 41 and the end edge 38 together form a non-pneumatic end portion 106.

As shown in fig. 1 and fig. 2, the fluid cushion body 10 is folded along a folding auxiliary line and connected by the end plastic-sealing seams 41 to form the square fluid packaging device with a square space three-dimensional structure. Wherein the square fluid packaging device comprises a packaging wall 101 and a top side wall 102 after being inflated. The package wall 101 further includes a bottom wall 1011, two folding walls 1012 and a perimeter wall 1013. The package wall 101 and the top side wall 102 are formed by the fluid storage cells 13 formed by the planar plastic seams 30. As shown in fig. 2, the folded wall 1012 is triangular in shape and is folded in two parts.

More specifically, as shown in fig. 1, the planar plastic sealing seam 30 further includes a plurality of rows of heat-sealing crease lines 37, and the inflated fluid cushion body 10 is adapted to be folded along the crease lines 37, so that the fluid cushion body 10 forms a plurality of side walls, i.e., the package wall 101 and the top side wall 102. These bending seams 37 do not separate the adjacent sub fluid storage units 131, that is, at least one communication passage is formed between the adjacent sub fluid storage units 131, so that air enters each sub fluid storage unit 131 through the communication passage when being inflated. In the example shown in the drawings, the central portion between the adjacent sub fluid storage units 131 is provided with the bending slits 37 formed by heat sealing, and the communication passages are formed at both sides of the bending slits 37. In another embodiment, the two end portions of the sub fluid storage unit 131 may be heat sealed to form the bending seams 37, and the middle portion may form the communication channel.

More specifically, each of the fluid storage units 13 of the fluid buffering body 10 has at least one pair of sub-folding slits 371, at least one wall separating slit 372 and at least one pair of folding wall folding slits 373, respectively. It should be noted that the positions of the bending seams 37 of the fluid storage units 13 correspond to each other, and the bending seams 37 of the fluid cushion body 10 are arranged at intervals, that is, the bending seams 37 arranged on a plurality of fluid storage units 13 are arranged along a straight line, but are not continuous, so that side walls are formed between the bending seams 37.

Each of the bent slits 37 divides the fluid storage unit 13 into two or more sub-fluid storage units 131. The planar plastic seam 30 also includes a plurality of rows of fluid storage cell divider seams 34. Each of the fluid storage unit partition slits 34 is connected to each of the corresponding folded wall bending slits 373, but may not be connected thereto, and partitions each of the fluid storage units 13 into the sub

fluid storage units

132 and 133 having a smaller width dimension than the sub fluid storage unit 131. That is, in the preferred embodiment of the present invention, the width of each of the sub fluid storage units 131 in fig. 1 is greater in value than the sub fluid storage unit 132 and is also greater than the sub fluid storage unit 133 in terms of dimensional value and relative angle. The width dimension of the sub fluid storage unit 132 is greater in value than the sub fluid storage unit 133. In other words, in this preferred embodiment of the present invention, each of the

sub-fluid storage units

131, 132, and 133 may be implemented as a large gas column, a medium gas column, and a small gas column, respectively, from a relative point of view. It will be understood by those skilled in the art that the large, medium and small are only for illustrating the difference in size of each of the sub

fluid storage units

131, 132 and 133 in the preferred embodiment, and the present invention is not limited thereto.

More specifically, in this preferred embodiment of the present invention, the wall separation seam 372 is used to separate the top sidewall 102 and the package wall 101 of the square fluid package device. When the lid portion of the square fluid packaging device is opened, the top side wall 102 is bent along the wall separation seam 372. As shown in fig. 1, the peripheral wall 1013 is formed between the wall separation slit 372 and the

sub-bending slits

371 and 373 on the right side, and between the edge sealing slit 32 and the

sub-bending slits

371 and 373 on the left side. Of course, it is understood that the peripheral wall 1013 is a square ring shape in fig. 2 formed by three-dimensional molding of the planar buffer body in fig. 1 through the end molding slit 41. That is, after the three-dimensional plastic encapsulation, the sub-fluid storage units 131 forming the peripheral wall 1013 in fig. 2 are air columns and are arranged in a ring shape.

It is understood that the bottom wall 1011 and the folded wall 1012 are formed between the sub bent slit 371 and the folded wall bent slit 373 on the left side and the sub bent slit 371 and the folded wall bent slit 373 on the right side of the planar buffer body in fig. 1. More specifically, the folded wall 1012 is formed between the folded wall bending slits 373, and the bottom wall 1011 is formed between the sub-bending slits 371. In other words, each of the sub fluid storage units 133 forms the folded wall 1012. The sub fluid storage unit 131 and each of the sub fluid storage units 132 formed between the sub bend lines 371 on the left and right sides form the bottom wall 1011. It will be understood by those skilled in the art that the number of the sub

fluid storage units

131, 132 and 133 forming the bottom wall 1011 and the folding wall 1012 is merely an example in this embodiment, and the present invention is not limited thereto. Preferably, the number of the fluid storage units 13 partitioned by the fluid storage unit partition slits 34 to form the sub fluid storage units 132 corresponds to the number of the sub fluid storage units 133 partitioned by the fluid storage unit partition slits 34. For example, in the preferred embodiment of the present invention, there are 4 fluid storage units 13 in fig. 1, which are separated by the fluid storage unit separation slit 34 to form a plurality of the sub fluid storage units 132, and correspondingly, there are 4 fluid storage units 13, which are separated by the fluid storage unit separation slit 34 to form a plurality of the sub fluid storage units 133. Of course, the number of fluid storage unit dividing slits 34 is not limited, and is provided in this preferred embodiment of the invention by way of example only.

It should be noted that, as shown in fig. 5, the fluid cushion body 10 further includes four folding lines 47. Each of the folding lines 47 extends obliquely between the connecting heat-seal point 44 and the sub-bent slits 371. Each of the folding lines 47 and each of the sub-bending slits 371 meet at a bending point 471. A bend line 48 is formed between the two corresponding bend points 471 of the fold lines 47. It is worth mentioning that the bending line 48 can be provided separately or can be folded through the separation slit 31. That is, each of the folded walls 1012 is formed between the two folding lines 47 and the folding line 48. After being folded along two

respective fold lines

47 and 48, the four fold points 471 form the bottom wall 1011 of the package wall 101 therebetween.

It is worth mentioning that, as shown in fig. 6 and 7, after the square fluid packaging device is inflated through the fluid filling valve 20, due to the balance of the gas pressure inside the square fluid packaging device, the sum of the thickness of each sub-fluid storage unit 133 forming the folding wall 1012 and the thickness of each sub-fluid storage unit 132 forming the bottom wall 1011 and provided with the fluid storage unit separation slit 34 is equal to or similar to the thickness of each sub-fluid storage unit 131 forming the bottom wall 1011, so that, when the folding wall 1012 is arranged at the bottom side of the bottom wall 1011, the folding wall 1012 does not protrude out of the plane of the bottom wall 1011. That is, when the square fluid packing device is placed in other types of packing bags in fig. 4, the folding wall 1012 not only provides multi-level buffering effect, but also enables the outer wall of the bottom of the square fluid packing device to be attached to the inner wall of other types of packing devices, such as square packing boxes, thereby saving space, not affecting buffering effect, and having stability. When the square fluid packing device is not combined with other types of packing bags in fig. 5 but used alone as a packing device, the square fluid packing device can stably stand on a plane even if the folded wall 1012 is provided at the bottom. Moreover, when a plurality of the square fluid-packing devices are put together for transportation or storage, the space between each of the square fluid-packing devices is not increased due to the existence of each of the folding walls 1012, and each of the square fluid-packing devices is more close to each other and has more stability.

It should be noted that, in the preferred embodiment of the present invention, the folding walls 1012 on both sides are disposed at the lower end of the bottom wall 1011. The folding wall 1012 and the bottom wall 1011 have different air column extending directions, so that the folding wall and the bottom wall are arranged in a stacked and crossed manner, the buffering performance of the bottom of the fluid packaging bag is enhanced, and the plane of the folding wall 1012 is the plane of the bottom wall 1011, so that the stability is enhanced, and meanwhile, the space is saved.

It should be noted that, according to a variant embodiment of the preferred embodiment of the present invention, the relative positions of the folding wall 1012 and the bottom wall 1011 can be implemented in a variant manner. That is, unlike the preferred embodiment in which the two-sided folding wall 1012 is fixed to the lower end of the bottom wall 1011, the two-sided folding wall 1012 may be fixed to the upper end of the bottom wall 1011, i.e., the bottom side of the interior of the square fluid packaging device, and the present invention is not limited thereto, as long as the outer walls of the bottom wall 1011 and the folding wall 1012 formed by the

sub-fluid storage units

131, 132 and 133 partitioned by the fluid storage unit partition seams 34 are in the same plane.

It is understood that, in this embodiment of the present invention, two overlapping portions 1011a corresponding to the folded walls 1012 are formed on the bottom wall 1011, and the remaining portions 1011b are formed. Wherein the overlapping portion 1011a has a smaller thickness than the remaining portion 1011b, such as may be formed by providing another heat sealing seam, schematically illustrated as the fluid storage unit separation seam 34 in the drawings, it will be understood that the position and shape of the heat sealing are not limited, such as extending in a transverse, longitudinal or oblique direction, and may be a strip, circle or polygon shape, and communicating the adjacent sub fluid storage units in the longitudinal direction. And, further, after the overlapping portion 1011a and the folding wall 1012 are overlapped, the sum of the thicknesses thereof may be equivalent to the thickness of the remaining portion 1011b, so that a flat surface is formed on the bottom side of the square fluid packing device. It will be understood that in other variants, the thickness of the folded portion 1011a, after it has been superimposed on the folded wall 1012, may be slightly less than that of the remaining portion 1011b, so that the folded wall 1012 does not protrude so as to form a large space with the container. Like this, the air packing device can be levelly and smoothly laminated with the packing box, forms compact structure. The overlapping portion 1011a overlaps the folded wall 1012, and the cushioning ability is still ensured.

It is worth mentioning that according to the preferred embodiment of the present invention, the package walls 101 form a stacked and crossed structure, which enhances the cushioning property of the bottom of the fluid packing bag. However, it will be understood by those skilled in the art that such a structure may be formed not only at the bottom of the square fluid packing device but also at a gas portion of the square fluid packing device, such as the top, side, etc.

Thus, the square fluid-packing device forms a receiving chamber 100 for packing an article to be packed. The accommodating cavity 100 is square in shape and can be used for packaging square articles to be packaged.

Fig. 8 to 13 show the square fluid packing device according to another embodiment of the present invention. Unlike the preferred embodiment of the present invention, the folding wall 1012A of the square-shaped fluid packaging device is not provided to the bottom wall 1011A but is provided to the peripheral wall 1013A of the square-shaped fluid packaging device. That is, as shown in fig. 9, the structure of the folding wall 1012A of the above-described preferred embodiment is applied to the side of the square-shaped fluid packing device of this embodiment.

Therefore, the square fluid packing device of the present invention forms a containing chamber 100A for packing the articles to be packed. The shape of the containing cavity 100A is square, and the containing cavity can be used for packaging square articles to be packaged, but it is understood that other shapes of articles to be packaged can be packaged, and the invention is not limited thereto.

As shown in fig. 8, the planar plastic sealing seam 30A further includes a continuously sealed side sealing seam 32A and a continuously sealed main channel sealing seam 33A respectively located at the left and right sides of the fluid buffering body 10A, wherein the main channel 151A is formed between the side sealing seam 32A at the left side and the main channel sealing seam 33A at the left side. It will be appreciated that the fluid filling valve 20A, the side sealing seam 32A, the main channel sealing seam 33A and the main channel 151A in this embodiment are formed identically to those in the preferred embodiment of the invention. The fluid storage units 13A at both ends of the fluid cushion body 10A are folded and connected by one end plastic-sealed seam 41A. And a terminal edge 38A is arranged outside the terminal plastic sealing seam 41A. The end pinch seal 41A and the end edge 38A together form a non-pneumatic end 106A.

As shown in fig. 8 and 9, the fluid cushion body 10A is folded along a folding auxiliary line and connected by the end plastic seam 41A to form the square fluid packaging device with a square space three-dimensional structure. Wherein the square fluid packaging device comprises a packaging wall 101A and a top side wall 102A. The package wall 101A further includes a bottom wall 1011A, two folding walls 1012A and a perimeter wall 1013A. The package wall 101A and the top side wall 102A are formed by each of the fluid storage cells 13A formed by each of the planar plastic seams 30A.

More specifically, as shown in fig. 1, the planar plastic sealing seam 30A further includes a plurality of rows of crease lines 37A that are heat sealed intermittently, and the inflated fluid cushion body 10A is adapted to be folded along the crease lines 37A, so that the fluid cushion body 10A forms a plurality of side walls, i.e., the package wall 101A and the top side wall 102A. These bending slits 37A do not separate the adjacent sub fluid storage units 131A, that is, at least one communication passage is formed between the adjacent sub fluid storage units 131A, so that air enters each sub fluid storage unit 131A through the communication passage when inflated. In the example shown in the drawings, the central portion between the adjacent sub fluid storage units 131A is provided with the bending slits 37A formed by heat sealing, and the communication passages are formed at both sides of the bending slits 37A. In another embodiment, the two end portions of the sub-fluid storage unit 131A may be heat sealed to form the bending seams 37A, and the middle portion may form the communication channel.

More specifically, each of the fluid storage units 13A of the fluid cushion body 10A has at least one pair of sub-folding slits 371A, at least one wall separation slit 372A, and at least one pair of folding wall folding slits 373A, respectively. It should be noted that the positions of the bending seams 37A of the fluid storage units 13A correspond to each other, and the bending seams 37A of the fluid cushion body 10A are arranged at intervals, that is, the bending seams 37A arranged on the fluid storage units 13A are arranged along a straight line, but are not continuous, so that side walls are formed between the bending seams 37A.

Each of the bent slits 37A divides the fluid storage unit 13A into two or more sub-fluid storage units 131A. The planar plastic seam 30A also includes a plurality of rows of fluid storage cell divider seams 34A. Each of the fluid-storing unit partition slits 34A is connected to each of the corresponding folded-wall bent slits 373A and partitions each of the fluid-storing units 13A into

sub-fluid storing units

132A and 133A having a smaller width dimension than the sub-fluid storing unit 131A. That is, in this embodiment of the present invention, the width of each of the sub fluid storage units 131A in fig. 8 is greater in value than the sub fluid storage unit 132A and is also greater than the sub fluid storage unit 133A in terms of the width dimension value and the relative angle. The width dimension of the sub fluid storage unit 132A is greater in value than the sub fluid storage unit 133A. In other words, in this embodiment of the present invention, each of the

sub-fluid storage units

131A, 132A, and 133A may be implemented as a large gas column, a medium gas column, and a small gas column, respectively, from a relative perspective. It will be understood by those skilled in the art that the large, medium and small are only for illustrating the difference in the width dimension of each of the sub

fluid storage units

131A, 132A and 133A in the preferred embodiment, and the present invention is not limited thereto.

More specifically, in this embodiment of the present invention, the wall separation seam 372A is used to separate the top sidewall 102A and the package wall 101A of the square fluid package device. When the lid portion of the square fluid packaging device is opened, the top side wall 102A is folded along the wall separation slit 372A. As shown in fig. 8, the peripheral wall 1013A is formed between the wall separation seam 372A and the sub-bending seam 371A and the folded wall bending seam 373A on the right side, and between the edge sealing seam 32A and the sub-bending seam 371A and the folded wall bending seam 373A on the left side.

It should be noted that, unlike the preferred embodiment of the present invention, the peripheral wall 1013A in fig. 9 is formed by the sub

fluid storage units

131A and 132A after three-dimensional molding and is arranged in a ring shape, but is not formed by all the sub fluid storage units 131A in the preferred embodiment. That is, as shown in fig. 9, the upper portion of the peripheral wall 1013A is formed for each of the sub fluid storage units 131A, and the lower portion near the bottom wall 1011A is formed for each of the sub fluid storage units 132A.

It is understood that the bottom wall 1011A is formed between the sub-bent slits 371A on the left side and the sub-bent slits 371A on the right side of the planar buffer body in fig. 8, and the folded wall 1012A is formed between the folded wall bent slits 373A. In other words, each of the sub fluid storage units 133A forms the folded wall 1012A. The sub fluid storage unit 131A formed between the sub bend lines 371A on the left and right sides forms the bottom wall 1011A. It will be understood by those skilled in the art that the number of the sub

fluid storage units

131A, 132A and 133A forming the peripheral wall 1013A and the folded wall 1012A is merely an example in this embodiment, and the present invention is not limited thereto. It should be noted that, as shown in fig. 10, the fluid cushion body 10A further includes four folding lines 47A. Each of the folding lines 47A extends obliquely between the connecting heat-seal point 44A and the sub-bent slits 371A. Each folding line 47A and each sub-bending seam 371A meet at a bending point 471A. A bend line 48A is formed between the two corresponding bend points 471A of the fold line 47A. It is noted that the bending line 48A may be provided separately, or may be folded through the separation slit 31A or the fluid storage unit separation slit 34A. That is, each of the folding walls 1012A is formed between the two folding lines 47A and the folding line 48A. After being folded along the two corresponding folding lines 47A and the corresponding bending lines 48A, the four bending points 471A form the bottom wall 1011A of the package wall 101A therebetween.

It is to be noted that, as shown in fig. 12 and 13, after the square fluid packing device is inflated by the fluid filling valve 20A, the sum of the thickness value of each of the sub fluid storage units 133A forming the folded wall 1012A and the thickness value of each of the sub fluid storage units 132A forming the peripheral wall 1013A is equal to or similar to the thickness value of each of the sub fluid storage units 131A forming the peripheral wall 1013A due to the balance of the gas pressure inside the square fluid packing device, so that, when the folded wall 1012A is disposed on the side of the peripheral wall 1013A, the folded wall 1012A does not protrude out of the plane in which the peripheral wall 1013A is located. That is, when the square fluid packing device is placed in other types of packing bags in fig. 11, the folding wall 1012A provides a multi-stage buffering effect, and enables the outer wall of the side portion of the square fluid packing device to be attached to the inner wall of the other types of packing bags, thereby saving space, not affecting the buffering effect, and having stability. When the square fluid packing device is not combined with other types of packing bags in fig. 10, but is used as a packing device alone, even if the folding walls 1012A are arranged on the side, when a plurality of square fluid packing devices are put together for transportation or storage, the space between the square fluid packing devices is not increased due to the existence of the folding walls 1012A, and the square fluid packing devices are more fit and stable.

Preferably, in order to achieve that the sum of the thickness value of each of the sub-fluid storage units 133A of the folded wall 1012A and the thickness value of each of the sub-fluid storage units 132A forming the peripheral wall 1013A is equal to or similar to the thickness value of each of the sub-fluid storage units 131A forming the peripheral wall 1013A, the length of the corresponding fluid storage unit partition seam 34A partitioning each of the sub-fluid storage units 132A is greater than or equal to twice the length of the corresponding fluid storage unit partition seam 34A partitioning each of the sub-fluid storage units 133A, i.e., the fluid storage unit partition seams 34A extending in length include the sub-fluid storage unit 133A having a middle portion 341A for forming a small air column and the sub-fluid storage unit 132A having two side portions 342A for forming a small air column, and the other air columns of the peripheral wall 1013A may be formed by the sub-fluid storage unit 131A having a larger air column . Of course, the length of the fluid storage unit partition 34A in this preferred embodiment of the invention is by way of example only, as long as the outer wall of the folded wall 1012A after the stereolithography is planar with the outer wall of the peripheral wall 1013A. It is understood that the division slit portions of the sub fluid storage unit 132A, which are used to form both ends of the fluid storage unit division slit 34A, may also be provided separately from the folded wall 1012A without extending integrally therewith, so long as it functions to form a small air column at the portion of the peripheral wall 1013A corresponding to the folded wall 1012A, thereby forming an integral flat surface at the side when the folded wall 1012A is folded to overlap the peripheral wall 1013A. It can also be said that the portions of the folded wall 1012A and the peripheral wall 1013A that overlap each other are small air columns, and the portions of the peripheral wall 1013A that do not overlap the folded wall 1012A are large air columns, so that the folded wall 1012A and the peripheral wall 1013A that overlap each other can form a substantially flat surface with other air columns of the peripheral wall 1013A, and thus the folded wall 1012A and the peripheral wall 1013A can be placed in a square storage package.

It should be noted that, according to the modified embodiment of the preferred embodiment of the present invention, the relative positions of the folded wall 1012A and the peripheral wall 1013A may be modified. That is, unlike the preferred embodiment in which the folded walls 1012A are disposed on the outside of the peripheral wall 1013A, the folded walls 1012A may be disposed on the inside of the peripheral wall 1013A, and the present invention is not limited thereto as long as the inner walls of the peripheral wall 1013A and the folded walls 1012A formed by the

sub-fluid storage units

131A, 132A, and 133A partitioned by the fluid storage unit partition seams 34A are on the same plane. Thus, when a packaged article is placed in the containing cavity 100A, the outer surface of the packaged article can fit the inner surface of the square fluid packaging device without affecting the cushioning effect or reducing the containing space due to the extra gap added by the folded wall 1012.

It will be appreciated that in this embodiment of the invention, two overlapping portions 1013A corresponding to the folded wall 1012A are formed in the peripheral wall 1013A, and the remaining portions 1013b are formed. Wherein the overlapping portion 1013a has a smaller thickness than the remaining portion 1013b, for example, may be formed by providing another heat-sealing seam, schematically illustrated in the figure as the fluid storage unit separation seam 34A including a middle portion 341A and two end portions 342A, the two end portions 342A providing the overlapping portion 1013a with a smaller thickness. It will be understood that the position and shape of the heat seal are not limited, and may be, for example, a strip, a circle or a polygon extending in a transverse, longitudinal or oblique direction, and may be formed to communicate the adjacent sub fluid storage units in the longitudinal direction. And, further, the sum of the thicknesses of the overlapped part 1013a and the folded wall 1012A after being overlapped may be equivalent to the thickness of the remaining part 1013b, so that a flat plane is formed at the bottom side of the square fluid packing device. It is understood that in other variations, the thickness of the overlapped part 1013a and the folded wall 1012A may be slightly smaller than that of the remaining part 1013b after being overlapped, so that the folded wall 1012A does not protrude to form a large gap with the packing box, and the fluid packing device is prevented from shaking in the packing box.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A square fluid packaging apparatus for cushioning at least one object to be packaged by fluid, comprising: at least one fluid packaging main body formed by plastic packaging connection of a series of plane plastic packaging seams and three-dimensional plastic packaging seams, wherein the fluid package body comprises a plurality of fluid storage units, wherein each fluid storage unit is bent to form a plurality of sub-fluid storage units which are communicated with each other, wherein the fluid package body is formed with at least one peripheral wall and at least one bottom wall by the sub-fluid storage unit after being filled with the fluid, the peripheral wall and the bottom wall form a square accommodating cavity for packaging the to-be-packaged articles, wherein the square fluid packaging device further comprises two folding walls which are respectively positioned at two ends of the bottom wall, wherein two of the folded walls are adapted to be respectively folded on the peripheral wall, wherein the peripheral wall forms an overlapping portion at a position corresponding to the overlapping of the folded walls, and the overlapping portion has a smaller thickness with respect to the remaining portion of the peripheral wall.

2. The square fluid packing device as claimed in claim 1, wherein said folded walls are adapted to form flat planes on the side surfaces of said fluid packing body, respectively, when being overlapped with said peripheral wall.

3. The square fluid packing device of claim 1, wherein the overlapping portion has the sub fluid storage unit of a smaller diameter with respect to the remaining portion of the peripheral wall.

4. A square fluid packaging device as defined in claim 1, wherein said folded walls, when overlapped with said overlapping portions of said peripheral wall, are adapted to be respectively overlapped outside said peripheral wall and to form flat planes respectively at outside surfaces of said fluid packaging main body.

5. The square fluid packing device as claimed in any one of claims 1 to 3, wherein two of said folded walls are adapted to be respectively folded on the inner sides of said peripheral walls and located in said containing chamber.

6. The square shaped fluid packing device as claimed in any one of claims 1 to 3, further comprising at least one top wall for closing the opening of said containing chamber.

7. The square shaped fluid packaging device of claim 5, further comprising at least one top wall for sealing the opening of said containing cavity.

8. The square fluid packaging device as claimed in any one of claims 1 to 3, wherein the peripheral wall, the bottom wall and the folded wall are integrally formed.

9. The square fluid packing device of claim 5, wherein the peripheral wall, the bottom wall and the folded wall are integrally formed.

10. A square shaped fluid packaging device as claimed in any one of claims 1 to 3, wherein each of said folded walls is folded in two.

11. A square shaped fluid packaging device as claimed in claim 10, wherein each of said folded walls is triangular in shape.

12. The square fluid packing device as claimed in any one of claims 1 to 3, wherein each of the folded walls is arranged in a staggered stack with the sub fluid storage units of the corresponding lamination portion.

13. The square fluid packaging device according to any one of claims 1 to 3, wherein the fluid packaging body is formed by heat-sealing and folding a first fluid storage film and a second fluid storage film, the fluid packaging body forms at least one fluid inlet and at least one main channel, and at least one fluid filling valve is provided in the fluid packaging body, fluid enters the main channel from the fluid inlet, and enters each of the fluid storage units from the main channel via the fluid filling valve.

14. The square fluid packaging device of claim 13, wherein the fluid filling valve comprises two valve films heat-sealed to the first fluid storage film and the second fluid storage film of the fluid packaging body, respectively, at least one fluid passage is formed between the two valve films, and inner surfaces of the two valve films automatically adhere to each other when the fluid storage unit is filled with fluid through the fluid passage, so as to prevent fluid entering the fluid storage unit from reversely permeating through the fluid passage.

15. A square fluid packaging apparatus for cushioning at least one object to be packaged by fluid, comprising: at least one fluid packaging main body formed by plastic packaging connection of a series of plane plastic packaging seams and three-dimensional plastic packaging seams, wherein the fluid package body comprises a plurality of fluid storage units, wherein each fluid storage unit is bent to form a plurality of sub-fluid storage units which are communicated with each other, wherein the fluid package body is formed with at least one peripheral wall and at least one bottom wall by the sub-fluid storage unit after being filled with the fluid, the peripheral wall and the bottom wall form a square accommodating cavity for packaging the to-be-packaged articles, wherein the square fluid packaging device further comprises two folding walls which are respectively positioned at two ends of the bottom wall, wherein the two folded walls are suitable for being respectively overlapped on the bottom wall, and the bottom wall forms an overlapping part at the position corresponding to the overlapping of the folded walls, and the overlapping part has smaller thickness relative to the rest part of the bottom wall.

16. A square fluid packaging device as defined in claim 15, wherein said two folded walls are adapted to form flat planes on the bottom side of said fluid packaging body when folded on said bottom wall, respectively.

17. The square fluid packaging device of claim 15, wherein the overlap has a smaller diameter of the sub fluid storage unit relative to the remaining portion of the bottom wall.

18. The square fluid packaging device as claimed in claim 15, wherein said folded walls, when overlapped with said overlapped portion of said bottom wall, are adapted to be respectively overlapped on the outer sides of said bottom wall and respectively form flat planes on the bottom side of said fluid packaging body.

19. The square fluid packaging device as claimed in any one of claims 15 to 17, wherein two of said folding walls are adapted to be respectively folded on the inner sides of said bottom wall and located in said containing chamber.

20. The square shaped fluid packing device as claimed in any one of claims 15 to 17, further comprising at least one top wall for sealing the opening of the containing chamber.

21. The square fluid packaging device as claimed in any one of claims 15 to 17, wherein the peripheral wall, the bottom wall and the folded wall are integrally formed.

22. The square shaped fluid packaging device as claimed in claim 20, wherein said top wall, said bottom wall, said peripheral wall and said folded wall are integrally formed.

23. A square shaped fluid packaging device as claimed in any one of claims 15 to 17, wherein each of said folded walls is folded in two.

24. The square shaped fluid packaging device of claim 23, wherein each of said folded walls is triangular in shape.

25. The square fluid packaging device as claimed in any one of claims 15 to 17, wherein each of the folded walls is arranged in a staggered stack with the sub fluid storage units of the corresponding lamination portion.

26. The square fluid packaging device according to any one of claims 15 to 17, wherein the fluid packaging body is formed by heat-sealing and folding a first fluid storage film and a second fluid storage film, the fluid packaging body forms at least one fluid inlet and at least one main channel, and at least one fluid filling valve is provided in the fluid packaging body, fluid enters the main channel from the fluid inlet, and enters each of the fluid storage units from the main channel via the fluid filling valve.

27. The square fluid packaging device of claim 26, wherein the fluid filling valve comprises two valve films heat-sealed to the first fluid storage film and the second fluid storage film of the fluid packaging body, respectively, at least one fluid passage is formed between the two valve films, and inner surfaces of the two valve films automatically adhere to each other when the fluid storage unit is filled with fluid through the fluid passage, so as to prevent fluid entering the fluid storage unit from reversely permeating through the fluid passage.