Cushion pad and packaging bag

Abstract

The present invention provides a cushion pad (100, 300) including at least one pad unit (10, 30) including at least one die-cut area (12, 320), the die-cut area (12, 320) increases in length when unfolded, the die-cut area (12, 320) expands the second surface (32) in the thickness direction when unfolded to become a buffer layer and play a role of buffer protection, and the die-cut area (12, 320) has a three-dimensional grid structure when unfolded. The present invention also provides a packaging bag (200, 400) including a pad unit, the manufactured packaging bag (200, 400) has a planar structure, and when used after transportation, the packaging bag is filled with an object or a pressing force is applied to the packaging bag to expand the pad unit (100, 300) to become a buffer layer (14, 321), thereby protecting the object contained in the packaging bag and saving transportation costs. When in use, the cushion pad (100, 300) can be inflated by putting an object into or pulling it out of the packaging bag, the cushion pad (100, 300) can be used as a cushioning material to fill an article or wrap an article, and the packaging bag can store the article.

Description

Technical Field

[0001] The present invention relates to the field of express packaging, and specifically to a cushion pad and a packaging bag manufactured using the cushion pad.

Background Art

[0002] In the field of packaging, cushion pads mainly play a role in protecting packaged articles and require a buffering function. For example, existing structures such as air cushion bags can be cited. The reason why a cushion pad functions as a cushion is that the cushion pad has a buffering effect in the thickness direction, but such a cushion pad has a relatively large thickness. Transportation cost is the main factor severely restricting the cost of cushion pads. When transporting a cushion pad or a packaging bag manufactured using a cushion pad to other countries or regions, due to the relatively large thickness of the cushion pad, the volume of the cushion pad increases, and the transportation cost increases due to the large-volume cushion pad and packaging bag.

[0003] A die-cut paper or a die-cut area on paper mainly forms cutting slits of various structures by die-cutting the paper material. Then, by applying an external force to the cutting slits, the cutting slits can be stretched into a three-dimensional network structure, and the three-dimensional network structure can play a role in buffering and protecting.

[0004] Currently, the materials that directly wrap the outer surface of an object and play a buffering role mainly include a bubble cushioning material structure, a plastic foam, etc., but these materials are not environmentally friendly. Of course, the three-dimensional network structure formed by stretching die-cut paper can also directly wrap the outer surface of an object and play a buffering role. However, it is necessary to stretch the die-cut paper, and most of the stretching process is done manually. Since the stretching point is in the hand during the manual stretching process, the applied force is not uniform, and when stretching the die-cut paper, only a part may be stretched while the other part may not be stretched easily, or the stretching force may be too strong when stretching the die-cut paper and it may be damaged.

[0005] Of course, it is also possible to make a packaging bag using die-cut paper. Currently, the packaging bags manufactured using die-cut paper mainly involve installing a three-dimensional network structure formed by stretching die-cut paper inside a paper outer bag body, and pasting the three-dimensional network structure on the inner wall of the outer bag body. In this way, the entire packaging bag can be made of paper, reducing environmental pollution while ensuring the cushioning effect of the packaging bag. However, the manufactured packaging bag has a large thickness, making it difficult to reduce transportation costs. In addition, the die-cut paper needs to be fixed to the inner wall of the outer bag body as a stretched three-dimensional network structure. When manufacturing, the die-cut paper needs to be stretched, and at the same time, a specific structure for maintaining the three-dimensional network structure needs to be fixed inside the outer bag body, making the manufacturing process complicated.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The object of the present invention is to provide a cushion pad in order to solve the technical problems described in the background art.

Means for Solving the Problems

[0007] The present invention is manufactured from a paper material, includes at least one pad unit, each of the pad units includes at least one layer of a third surface, the third surface includes a die-cut region and a transmission region, the transmission region is at the center of the third surface, and is a long-shaped region provided along the short side direction of the third surface. The die-cut region is located on one side of the transmission region. The transmission region is used to transmit a stretching force to the die-cut region to expand the die-cut region. The expanded die-cut region serves as a buffer layer, and the buffer layer expands the third surface in the thickness direction to play a role in buffer protection, and discloses a cushion pad.

[0008] The present invention also is manufactured from a paper material, comprising at least one pad unit, each of the pad units, has a first surface provided with at least one extended region, the extended region being deployable along the longitudinal direction of the first surface, and when the extended region is deployed, the length of the first surface increases; and at least one layer of a second surface having both longitudinal ends fixed to both ends of the first surface respectively, and provided with a die-cut region whose length increases as the extended region is deployed, the die-cut region being deployed to form a buffer layer, and the buffer layer expanding the second surface in the thickness direction to serve as a buffer protection; discloses another cushion pad, where the die-cut region forms a three-dimensional grid structure when deployed.

[0009] When the pad unit of the present invention is stretched and deployed by an external force, the third surface expands in the thickness direction and functions as a buffer material, capable of wrapping the surface of an article. Moreover, since the cushion pad uses a paper material, the used one is decomposable and environmentally friendly. The manufactured cushion pad is in a planar shape and only expands into a three-dimensional network structure when used after transportation. The planar product saves transportation costs compared to a three-dimensional product of large volume.

[0010] The present invention also provides, an outer bag, and the pad unit provided along the longitudinal direction inside the outer bag and configured such that both short sides in the transverse direction are not connected to the outer bag. Discloses a packaging bag manufactured using the pad unit, where when an object is placed in the packaging bag, the storage direction is consistent with the longitudinal direction of the pad unit, the pad unit unfolds along the storage direction, and expands in the thickness direction of the pad unit to serve as a buffer protection.

Advantages of the Invention

[0011] The packaging bag disclosed in the present invention is manufactured using a pad unit. Since the manufactured packaging bag has a flat structure, transportation costs can be saved. When in use, items can be directly stored in the packaging bag, and the internal pad unit is deployed by the gravity of the items and the pushing force when putting in the items, becoming a buffer layer with a three-dimensional network structure, and the packaging bag has a buffering effect due to the buffer layer. Since it is not necessary to manufacture the buffer layer in the shape of a three-dimensional network structure inside the packaging bag, the manufacturing process is simple. Also, since a buffer layer can be formed on the bag body just by putting in the items, the packaging bag is easy to use.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Figure 27

Figure 28

Figure 29

Figure 30

Figure 31

Figure 32

Figure 33

Figure 34

Figure 35

Figure 36

Figure 37

Figure 38

Figure 39

Figure 40

Figure 41

Figure 42

Figure 43

Embodiments for Carrying Out the Invention

[0013] Hereinafter, the present invention will be further interpreted and described with reference to specific examples and the drawings of the specification. As shown in FIGS. 1 and 2, the present invention discloses a cushion pad 100, which is made of a paper material and can be decomposed or recycled if it has been used as a cushioning filler or an exterior material.

[0014] The cushion pad 100 includes at least one pad unit 10. Each of the pad units 10 includes at least one layer of a third surface 11. The third surface 11 includes a die-cut area 12 and a transmission area 13. The transmission area 13 is at the center of the third surface 11 and is an elongated area provided along the short side direction of the third surface 11. The die-cut area 12 is located on one side of the transmission area 13. The transmission area 13 is used to transmit a stretching force to the die-cut area 12 to fully expand the die-cut area 12. The expanded die-cut area 12 becomes a buffer layer 14. The buffer layer 14 expands the third surface 11 in the thickness direction to play a role in buffer protection.

[0015] In the present invention, the die-cut area 12 obtained by die-cutting is formed by die-cutting a plurality of rows of cutting slits 122 in a paper material. The two adjacent rows of cutting slits 122 are arranged in a staggered manner. When an external force is applied to the die-cut area 12, the cutting slits 122 are stretched into a three-dimensional shape, forming a three-dimensional grid structure. When the cutting slits 122 are stretched, generally, a three-dimensional hexagon or a three-dimensional square is formed. At this time, the length of the die-cut area 12 increases, and it expands in the thickness direction to become the buffer layer 14, thus playing a role in buffer protection.

[0016] One specific structure of the die-cut area 12 includes a plurality of cut lines 121 arranged in a row. Each cut line 121 includes a plurality of cutting slits 122 distributed at intervals. The cutting slits 122 of two adjacent cut lines 121 are arranged in a staggered manner. The lengths and cutting intervals of the cutting slits 122 of each cut line 121 are the same. When such a die-cut area 12 is stretched, the cutting slits 122 form a three-dimensional hexagonal structure.

[0017] In this embodiment, when the cushion pad 100 is not deployed, its thickness is equal to that of paper. At this time, it can be transported to overseas markets through cargo transportation means, and transportation costs can be saved. When the user uses it, the cushion pad 100 is stretched manually or by a stretching device, the die-cut area 12 is deployed, and when it expands in the thickness direction, the expanded cushion pad 100 functions as a buffer material.

[0018] As shown in FIG. 3, a plurality of the pad units 10 are connected end-to-end. In this case, the cushion pad 100 formed by connecting the pad units 10 has a strip-like structure. In this way, while it is advantageous for forming the buffer layer 14 by stretching it into a strip shape, when wrapping the outside of an article, the buffer effect can be further improved by winding it around the outside of the article in multiple layers.

[0019] As shown in FIGS. 4 to 6, the present invention also manufactures a packaging bag 200 using the cushion pad 100. Since the thickness of the manufactured packaging bag 200 before use is thin, transportation costs can be significantly saved. Only when it is deployed by an external force when used after transportation, the thickness increases to obtain a packaging structure with a buffer effect. As the deployment method, most preferably, when an article is placed into the packaging bag 200, the pad unit 10 is deployed inside the packaging bag 200 by the gravity of the article or the pushing force when the article is placed, to form the buffer layer 14 and achieve the buffer effect.

[0020] Specifically, the packaging bag 200 includes an outer bag body and one pad unit 10. The pad unit 10 is provided inside the outer bag body along the longitudinal direction, and both side edges in the short direction of the pad unit 10 are configured not to be connected to the outer bag body, thereby facilitating the deployment of the die-cut area 12. When an object is placed into the packaging bag 200, the storage direction is consistent with the longitudinal direction of the pad unit 10, and the pad unit 10 expands along the storage direction and expands in its thickness direction, thereby fulfilling the role of buffer protection.

[0021] In this embodiment, both ends of the pad unit 10 in the longitudinal direction are respectively provided near the inner wall of the opening of the outer bag body 20, and the center of the pad unit 10 is in the hollow part within the outer bag body 20. When the pad unit 10 is deployed along the storage direction, its center moves to the bottom of the inner bag body, whereby the buffer layer 14 covers substantially the entire side surface of the outer bag body 20, ensuring the buffer effect of the protective bag.

[0022] As shown in FIGS. 7 and 8, in another embodiment of the present invention, each pad unit 10 includes two die-cut regions 12, and the two die-cut regions 12 are respectively located on both sides of the transmission region 13. When it is necessary to deploy the pad unit 10, one die-cut region 12 is stretched by an external force. One die-cut region 12 uniformly transmits the stretching force to the other die-cut region 12 through the transmission region 13, thereby deploying the other die-cut region 12. By providing the transmission region 13, it is possible to avoid the occurrence of twisting due to uneven stretching force when deploying the other die-cut region 12. For example, some regions are deployed to form a three-dimensional network structure, while the remaining parts cannot be deployed. Further, when the two die-cut regions 12 are deployed, the buffer utilization rate is higher than that of the structure with only one die-cut region 12. When used as a packaging material or a filling material, the wrapping range of the buffer layer 14 becomes larger, and the buffer effect is further improved.

[0023] As shown in FIG. 9, a plurality of pad units 10 having two die-cut regions 12 are connected end-to-end to form a cushion pad 100. When such a cushion pad 100 is stretched to wrap the surface of an article, the buffer effect is further improved as compared with a cushion pad 100 having only one die-cut region 12.

[0024] In FIGS. 10 and 11, a packaging bag 200 is manufactured using the pad unit 10 of the present embodiment. Specifically, the packaging bag 200 includes an outer bag body 20 and one pad unit 10 having two die-cut regions 12. When an object is placed in the packaging bag 200, the storage direction is the same as the longitudinal direction of the pad unit 10. The two die-cut regions 12 of the pad unit 10 are unfolded along the storage direction, and two buffer layers 14 are formed on both side surfaces of the packaging bag 200. The two buffer layers 14 expand in the thickness direction of the pad unit 10, thereby playing a role of buffer protection. Such a structure can resist the breaking force from any direction on both side surfaces of the packaging bag 200.

[0025] Similarly, both ends in the longitudinal direction of the pad unit 10 are respectively provided near the inner wall of the opening of the outer bag body 20, and the center of the pad unit 10 is in the hollow part inside the outer bag body 20. When the pad unit 10 is unfolded along the storage direction, the center of the pad unit 10 moves to the bottom of the inner bag body. Thereby, the buffer layer 14 covers substantially the entire side surface of the outer bag body 20, and moreover, the entire two side surfaces are all covered, ensuring the buffer effect of the protective bag.

[0026] As shown in FIG. 12, in another embodiment of the present invention, the pad unit 10 may include a plurality of third surfaces 11. Both ends of the plurality of layers of the third surfaces 11 are connected to each other. In this case, the plurality of third surfaces 11 may have only one die-cut region 12, may have two die-cut regions 12, or may be a combination of a pad unit 10 having one die-cut region 12 and a pad unit 10 having two die-cut regions 12. In this embodiment, all of the plurality of third surfaces 11 become a buffer layer 14 having a three-dimensional network structure when the die-cut region 12 is stretched, that is, a plurality of buffer layers 14 are obtained. When the plurality of buffer layers 14 are laminated, the buffer effect becomes higher.

[0027] As shown in FIGS. 13 and 14, a packaging bag 200 is manufactured using a pad unit 10 having a plurality of third surfaces 11. Such a packaging bag 200 has a better buffering effect than a packaging bag 200 manufactured using a pad unit 10 having only one layer of the third surface 11.

[0028] As a preferred embodiment of the present invention, the pad unit 10 has a plurality of third surfaces 11, and the transmission regions 13 of two adjacent layers of the third surfaces 11 are provided in a staggered manner or do not completely overlap. In this case, when the die-cut regions 12 of two layers are developed, at least one layer of the buffer layer 14 faces the transmission region 13 of another layer. The transmission region 13 is a paper material that has not been die-cut and can function as a support surface for the buffer layer 14 of another layer. When the buffer layer 14 receives a force, it acts on the support surface. When the support surface reacts, the resilience of the buffer layer 14 is improved, and a better buffering effect is shown.

[0029] In the above embodiments of the present invention, when manufacturing the pad unit 10, it is not necessary to stretch the die-cut region 12 into a three-dimensional network structure, so the transportation cost can be saved. Also, when manufacturing the packaging bag 200 using the pad unit 10, it is not necessary to fix it inside the packaging bag 200 as a three-dimensional network structure. It is only necessary to directly connect or adhere the flat paper material. In this way, the transportation cost can be saved, and the manufacturing process can be simplified.

[0030] As shown in FIG. 15, the present invention also discloses another cushion pad 300, which is made of a paper material and includes one pad unit 30. The pad unit 30 includes a first surface 31 and a second surface 32. The first surface 31 is provided with an extension area 311, and the extension area 311 can be expanded along the longitudinal direction of the first surface 31. When the extension area 311 expands, the length of the first surface 31 increases. Both longitudinal ends of the second surface 32 are respectively fixed to both ends of the first surface 31, and a die-cut area 320 is provided whose length increases as the extension area 311 expands. When the die-cut area 320 expands to form a buffer layer, the buffer layer expands the second surface 32 in the thickness direction to play a role in buffer protection. When the die-cut area 320 expands, it becomes a three-dimensional grid structure.

[0031] The die-cut area 320 includes a plurality of cut lines 322 arranged in a columnar shape. Each cut line 322 includes a plurality of cutting slits 323 distributed at intervals. The cutting slits 323 of two adjacent cut lines 322 are arranged in a staggered manner. The lengths and cutting intervals of the cutting slits 323 of each cut line 322 are the same. When the die-cut area 320 is stretched, such cut lines 322 and cut openings become three-dimensional hexagonal openings, whereby the die-cut area 320 becomes a buffer layer and plays a role in buffer protection.

[0032] In this embodiment, the extension area 311 is an area that can be stretched. The expansion length of the extension area 311 is the same as the length by which the die-cut area 320 is stretched on the second surface 32. The expanded die-cut area 320 also becomes a buffer layer with a three-dimensional network structure and plays a role in buffering. Such a pad unit 30 can also wrap the outside of an article to play a role in protection.

[0033] As shown in FIG. 16, in another embodiment of the present invention, there are two of the extension regions 311, and the two extension regions 311 are each close to both ends of the first surface 31. When the first surface 31 is stretched by an external force, the two extension regions 311 are synchronously deployed on the second surface 32. Compared with the embodiment having only one extension region 311, it is easier to stretch, and the stretching length of the extension region 311 is large, and a higher stretching rate can be imparted to the second surface 32.

[0034] As shown in FIG. 17, in the present embodiment, the cushion pad 300 may have a plurality of pad units 30 connected end-to-end, and the first surface 31 and the second surface 32 are fixed to each other at the ends of the pad unit 30. In this case, the cushion pad 300 connecting the plurality of pad units 30 has a strip-like structure. In this way, while it is advantageous for forming a buffer layer by stretching in a strip shape, when wrapping the outside of an article, the buffer effect can be further improved by winding a plurality of layers around the outside of the article.

[0035] As shown in FIG. 18, in the present embodiment, the pad unit 30 may include a plurality of second surfaces 32, the plurality of second surfaces 32 are connected to each other at both ends of the first surface 31, and when the plurality of second surfaces 32 are stretched, a multi-layer buffer layer structure is formed, and the buffer effect becomes better. Preferably, a plurality of cutting lines 322 of the plurality of second surfaces 32 are provided in a staggered pattern. In this way, when the plurality of second surfaces 32 are stretched, the formed three-dimensional network structure also becomes staggered. In this case, the plurality of buffer layers act on each other or mesh with each other to obtain a greater supporting force, thereby ensuring a better buffer effect.

[0036] As shown in FIGS. 19 and 20, the extension region 311 is formed by corrugating or folding the first surface 31 in the short side direction, and the increased length when the extension region 311 is deployed is the same as the increased lengths of the first surface 31 and the second surface 32.

[0037] Manufacturing methods such as wrinkling or folding are simple, can reduce the requirements for the manufacturing process of the first surface 31, ensure the production efficiency of the pad unit 30, and can reduce costs. As shown in FIGS. 21 to 24, the present invention also discloses a packaging bag 400 manufactured using the pad unit 30 in this embodiment. Specifically, the packaging bag 400 includes an outer bag body 40 and one pad unit 30. The pad unit 30 is provided inside the outer bag body 40 along the longitudinal direction, and both side edges in the short direction of the pad unit 30 are configured not to be connected to the outer bag body 40. When an object is placed in the packaging bag 400, the storage direction is consistent with the longitudinal direction of the pad unit 30, and the pad unit 30 expands along the storage direction and expands in the thickness direction of the pad unit 30, thereby playing a role of buffer protection.

[0038] The width of the pad unit 30 is less than the width of the packaging bag 400. After the pad unit 30 is expanded, both side edges in the short direction of the pad unit 30 abut against two inner side edges of the outer bag body 40, and a relatively sealed space is formed between the outer bag body 40 and the pad unit 30.

[0039] Both ends in the longitudinal direction of the pad unit 30 are respectively provided near the inner wall of the opening of the outer bag body 40, the center of the pad unit 30 is in the hollow part of the outer bag body 40, and when the pad unit 30 expands along the storage direction, its center moves to the bottom of the inner bag body.

[0040] When an object is placed in the packaging bag 400, the storage direction is consistent with the longitudinal direction of the pad unit 30, the die-cutting area 320 of the second surface 32 expands along the storage direction, and two buffer layers 321 are formed on both side surfaces of the packaging bag 400. The two buffer layers 321 expand in the thickness direction of the pad unit 30, thereby playing a role of buffer protection. Such a structure can resist the destructive force from any direction on both side surfaces of the packaging bag 400.

[0041] The shape of the packaging bag 400 when the pad unit 30 inside the packaging bag 400 is not deployed is shown in FIG. 21, and the structure of the packaging bag 400 with the pad unit 30 inside the packaging bag 400 deployed is shown in FIG. 22. As can be seen from the figures, when the second surface 32 is deployed, the extension area 311 of the first surface 31 also synchronously deploys, forming a smooth inner wall structure, which makes it easier to put an object in.

[0042] As shown in FIGS. 23 and 24, preferably, the distance from one end of the first surface 31 to one of the extension areas 311 is different from the distance from the other end of the first surface 31 to the other extension area 311. In this case, when the first surface 31 is deployed, the two extension areas 311 are displaced from each other, so that there is no interference between them during deployment in a narrow space such as the inside of the packaging bag 400, the resistance during deployment of the extension area 311 is reduced, it becomes easier to put an object in, and the effectiveness of deployment is further ensured.

[0043] The deployment lengths of the two extension areas 311 are the same. When putting an object in, by making the deployment lengths the same, displacement of the contact position between the object and the first surface 31 is avoided, putting the object in becomes smoother, and problems such as the object being difficult to put in due to the frictional force between the object and the first surface 31 and the force required to deploy the second surface 32 are solved. Here, when the pushing force is large, there is a possibility of causing damage to the first surface 31.

[0044] More preferably, the extension area 311 is formed by folding the first surface 31 in the short side direction, and the folding widths of the two extension areas 311 are small, so that the extension area 311 is easier to deploy even in a narrow space.

[0045] By making the folding width small, the deployment in a narrow space becomes smoother and the required pushing force becomes smaller.

[0046] As shown in FIGS. 25 and 26, in a preferred embodiment, the width of the second surface 32 is slightly smaller than the width of the first surface 31. As can be seen from the figure, in this case, when the second surface 32 is fully unfolded, the second surface 32 acts on the outer bag body 40 and the first surface 31, bringing the outer bag body 40 and the first surface 31 into contact near the side edges in the object storage direction. That is, the two longitudinal side edges of the first surface 31 abut against the inner wall of the outer bag body 40. On the other hand, both ends in the longitudinal direction of the second surface 32 are connected near the opening of the outer bag body 40. Thereby, the second surface 32 is within a space sealed by the first surface 31 and the outer bag body 40. The second surface 32 itself has a buffer layer 321, which plays a buffering role. Meanwhile, a cavity containing air is formed within the second surface 32. When the outer bag body 40 is subjected to an external force, the air in the cavity can also play a buffering role, thereby further improving the buffering effect.

[0047] As shown in FIGS. 27 and 28, as an embodiment of the present invention, the pad unit 30 includes two layers of the second surface 32. The two layers of the second surface 32 are connected to each other at the end of the pad unit 30. When the packaging bag 400 is manufactured using the pad unit 30, two layers of buffer layers 321 are formed on each side surface inside the packaging bag 400, thereby improving the buffering effect of the packaging bag 400.

[0048] As shown in FIGS. 29 and 30, the pad unit 30 of the present invention also has another embodiment.

[0049] The second surface 32 includes a first sub - surface 33 and a second sub - surface 34. The first sub - surface 33 and the second sub - surface 34 are die - cut areas 320, and the first sub - surface 33 and the second sub - surface 34 jointly constitute the second surface 32. One end of the first sub - surface 33 is connected to one end of the first surface 31, and the other end of the first sub - surface 33 is connected to the center line in the longitudinal direction of the first surface 31. The second sub - surface 34 is connected to the other end of the first surface 31, and the other end of the second sub - surface 34 is connected to the center line in the longitudinal direction of the first surface 31.

[0050] As shown in FIGS. 31 and 32, in this embodiment, the pad unit 30 is used to manufacture the packaging bag 400. By folding the pad unit 30 in half, it is ensured that the position of the center line of the first surface 31 coincides with the bottom of the outer bag body 40. When manufacturing the packaging bag 400 using this pad unit 30, since the packaging bag 400 itself is thin, the transportation cost can be reduced. When an object is placed in the packaging bag 400 or the first sub-surface 33 and the second sub-surface 34 of the second surface 32 are pushed and expanded by an external force, the first sub-surface 33 and the second sub-surface 34 expand in the thickness direction to form the buffer layer 321. When the first sub-surface 33 and the second sub-surface 34 expand, the first sub-surface 33 is affected by the tensile forces from both ends of itself, that is, the tensile forces at one end of the first surface 31 and the center line of the second surface 31 respectively. Therefore, it is easy to pull and expand the first sub-surface 33, and the expansion of the second sub-surface 34 also becomes easier.

[0051] As shown in FIGS. 33 and 34, the pad unit 30 of the present invention also has another embodiment.

[0052] The first surface 31 has a transmission region 312 at the center of the first surface 31, which is an elongated region provided along the short side direction of the first surface 31. The second surface 32 includes a first sub-surface 33 and a second sub-surface 34. The first sub-surface 33 and the second sub-surface 34 are die-cut regions 320, and the first sub-surface 33 and the second sub-surface 34 jointly constitute the second surface 32. One end of the first sub-surface 33 is connected to one end of the first surface 31, and the other end of the first sub-surface 33 is connected to one end of the transmission region 312. The second sub-surface 34 is connected to the other end of the first surface 31, and the other end of the second sub-surface 34 is connected to the other end of the transmission region 312.

[0053] As shown in FIGS. 35 and 36, the present invention also manufactures a packaging bag 400 using the present pad unit 30. In the manufactured packaging bag 400, since it is thin itself, the transportation cost can be reduced. When an object is placed in the packaging bag 400, the object directly abuts against the transmission area 312. The transmission area 312 presses and unfolds the first surface 31, and the first surface 31 unfolds the first sub-surface 33 and the second sub-surface 34. In particular, when unfolded, there is no die-cut area 320 at the position corresponding to the transmission area 312, so the transmission area 312 can easily directly abut against the bottom of the packaging bag 400. Thereby, the buffer area formed by unfolding the first sub-surface 33 and the second sub-surface 34 across the two side surfaces of the outer bag body 40 is covered, further increasing the storage depth. Also, the pressing force required to unfold the first surface 31 is small, making its unfolding easier. Furthermore, it is possible to unfold the first sub-surface 33 and the second sub-surface 34 only by the gravity of the placed article. Compared with the case where the second surface 32 entirely covers the first surface 31, when unfolding, the transmission area 312 does not rub against the second surface 32, so the unfolding is ensured to be smoother.

[0054] As shown in FIGS. 37 and 38, the pad unit 30 of the present invention also has another embodiment.

[0055] The first surface 31 has a transmission area 312 at the center of the first surface 31. The second surface 32 has a blank area 324 facing the transmission area 312. The transmission area 312 is an elongated area provided along the short side direction of the first surface 31. The second surface 32 includes a first sub-surface 33 and a second sub-surface 34. The first sub-surface 33 and the second sub-surface 34 are respectively located on both sides of the blank area 324. The first sub-surface 33, the second sub-surface 34, and the blank area 324 jointly constitute the second surface 32. The side of the first sub-surface 33 away from the blank area 324 is connected to one end of the first surface 31, and the opposite side of the second sub-surface 34 away from the blank area 324 is connected to the other end of the first surface 31.

[0056] In this embodiment, the second surface 32 is complete, the first sub-surface 33 and the second sub-surface 34 are parts of the second surface 32. For the second surface 32, similarly, it is only necessary to connect both ends of the second surface 32 to both ends of the first surface 31 respectively, and there is no need to cut, paste, and fix the first sub-surface 33 and the second sub-surface 34 respectively.

[0057] When unfolding the first sub-surface 33 and the second sub-surface 34, it is only necessary to push or pull the transmission area 312 or the blank area 324. Also, since the blank area 324 of the second surface 32 does not rub against the first surface 31, the unfolding of the first sub-surface 33 and the second sub-surface 34 becomes even smoother.

[0058] As shown in FIGS. 39 and 40, in the present invention, a packaging bag 400 is manufactured using the pad unit 30 of this embodiment. Here, when the pad unit 30 is fixed to the packaging bag 400, a complete buffer layer 321 is formed on two side surfaces of the outer bag body 40. Further, the blank area 324 and the transmission area 312 can abut against the bottom of the packaging bag 400. Therefore, the storage depth increases.

[0059] As shown in FIGS. 41 and 42, the pad unit 30 of the present invention also has another embodiment.

[0060] The extension area 311 of the first surface 31 may be the die-cut area 320. The first surface 31 has a transmission area 312, and there are two extension areas 311. Both ends of the two extension areas 311 are connected to the longitudinal end of the first surface 31 and the blank area 324 respectively. The transmission area 312 is at the center of the first surface 31, and the transmission area 312 is an elongated area provided along the short side direction of the first surface 31.

[0061] At this time, by pushing or pulling the transmission area 312 with an external force, the extension area 311 can be unfolded to form the buffer layer 321, and the second surface 32 can also be unfolded to form the buffer layer 321. In this case, the pad unit 30 comes to have two layers of buffer layer 321.

[0062] As shown in FIG. 43, the packaging bag 400 is manufactured using the pad unit 30 of the present embodiment. Here, when an object is placed in the packaging bag 400, the extension region 311 of the first surface 31 expands, and the die-cut region 320 of the second surface 32 expands, forming a two-layer structure. When manufacturing this pad unit 30, in one step of die-cutting, both the first surface 31 and the second surface 32 can be cut, eliminating the need for additional pasting, wrinkling, or folding operations. Thus, the manufacturing process is simple and cost can be reduced.

[0063] Note that the above examples are only for explaining the technical solution of the present invention and do not limit the patent scope of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, as can be understood by those skilled in the art, for the technical solution of the present invention, modifications and equivalent substitutions can be made without departing from the spirit and scope of the technical solution of the present invention.

Explanation of Reference Numerals

[0064] 30 Pad unit 31 First surface 32 Second surface 311 Extension region 320 Die-cut region 322 Cut line 323 Cutting slit

Claims

**Claim 1** A cushion pad, manufactured from a paper material and including a plurality of pad units, each of the pad units having a first surface provided with a plurality of extended regions, both ends of each extended region being connected to the first surface, the extended region being deployable along the longitudinal direction of the first surface, and the length of the first surface increasing when the extended region is deployed; a first surface, a plurality of second surfaces each having both longitudinal ends fixed to both ends of the first surface respectively and provided with a die-cut region whose length increases as the extended region is deployed, at least one layer of the die-cut regions being deployed to form a buffer layer, and the buffer layer expanding the second surface in the thickness direction to serve as a buffer protection; at least one layer of a plurality of second surfaces, and a three-dimensional grid structure formed by deploying the die-cut region, the pad units being connected at both ends, and the first surface and the second surface being fixed to each other at the ends of the pad units, the die-cut region including a plurality of cut lines arranged in a row, each cut line including a plurality of cutting slits distributed at intervals, the cutting slits of two adjacent cut lines being arranged in a staggered manner, and the lengths and cutting intervals of the cutting slits of each cut line being the same, the extended region being formed by corrugating or folding the first surface in the short direction, and the increased length when the extended region is deployed being the same as the increased lengths of the first surface and the second surface, **Claim 2** There are two extended regions, and the two extended regions are respectively close to both ends of the first surface, the distance from one of the extended regions from one end of the first surface being different from the distance from the other extended region from the other end of the first surface, **Claim 3** the extended region being formed by folding the first surface in the short direction, and the extended region being deployable in a narrow space, the second surface having two layers, and both ends of the two layers of the second surface being connected to both ends of the first surface respectively, **Claim 4** The second surface includes a first sub-surface and a second sub-surface. The first sub-surface and the second sub-surface are die-cut areas. The first sub-surface and the second sub-surface jointly constitute the second surface. One end of the first sub-surface is connected to one end of the first surface, the other end of the first sub-surface is connected to the center line in the longitudinal direction of the first surface, the second sub-surface is connected to the other end of the first surface, and the other end of the second sub-surface is connected to the center line in the longitudinal direction of the first surface. The cushion pad according to claim 1, characterized in that.

5. The first surface has a transmission area which is a long-shaped area provided along the short-side direction of the first surface and is at the center of the first surface. The other end of the first sub-surface is connected to one end of the transmission area, the second sub-surface is connected to the other end of the first surface, and the other end of the second sub-surface is connected to the other end of the transmission area. The cushion pad according to claim 4, characterized in that.

6. The first surface has a transmission area at the center of the first surface, the second surface has a margin area facing the transmission area, and the transmission area is a long-shaped area provided along the short-side direction of the first surface. The second surface includes a first sub-surface and a second sub-surface. The first sub-surface and the second sub-surface are respectively located on both sides of the margin area. The first sub-surface, the second sub-surface and the margin area jointly constitute the second surface. The side of the first sub-surface away from the margin area is connected to one end of the first surface, and the opposite side of the second sub-surface away from the margin area is connected to the other end of the first surface. The cushion pad according to claim 1, characterized in that.

7. A packaging bag, An outer bag body, A plurality of pad units provided in the outer bag body along the longitudinal direction and configured such that both side edges in the short-side direction are not connected to the outer bag body. Each of the pad units A first surface provided with a plurality of extension areas, the extension areas being deployable along the longitudinal direction of the first surface, and when the extension areas are deployed, the length of the first surface increases. A plurality of second surfaces having die-cut areas with both longitudinal ends fixed to both ends of the first surface respectively and the length increasing with the deployment of the extension areas. When the die-cut areas are deployed, they form a buffer layer, and the buffer layer expands the second surface in the thickness direction to play a role in buffer protection. The die-cut area expands to form a three-dimensional grid structure. When an object is stored in the packaging bag, the storage direction coincides with the longitudinal direction of the pad unit. The pad unit expands along the storage direction and expands in the thickness direction of the pad unit to serve as a buffer for protection. The extension area is formed by corrugating or folding the first surface in the short direction. The increased length when the extension area expands is the same as the increased lengths of the first surface and the second surface. A packaging bag characterized by this.

8. A packaging bag, including an outer bag body, and a pad unit provided in the outer bag body along the longitudinal direction and configured such that both side edges in the short direction are not connected to the outer bag body. Each of the pad units has a first surface provided with at least one extension area and at least one transmission area. The extension area can expand along the longitudinal direction of the first surface. When the extension area expands, the length of the first surface increases. The transmission area is located in the middle of the first surface and is an elongated area provided along the short direction of the first surface. A second surface including a first sub-surface and a second sub-surface. The first sub-surface and the second sub-surface are die-cut areas. The first sub-surface and the second sub-surface jointly form the second surface. One end of the first sub-surface is connected to one end of the first surface, the other end of the first sub-surface is connected to one end of the transmission area, one end of the second sub-surface is connected to the other end of the first surface, and the other end of the second sub-surface is connected to the other end of the transmission area. The length of the die-cut area increases as the extension area expands. The die-cut area expands to form a buffer layer, and the buffer layer expands the second surface in the thickness direction to serve as a buffer for protection. The die-cut area expands to form a three-dimensional grid structure. When an object is stored in the packaging bag, the storage direction coincides with the longitudinal direction of the pad unit. The pad unit expands along the storage direction and expands in the thickness direction of the pad unit to serve as a buffer for protection. The extension area is formed by corrugating or folding the first surface in the short direction. The increased length when the extension area expands is the same as the increased lengths of the first surface and the second surface. A packaging bag characterized by this.

9. The width of the pad unit is less than the width of the packaging bag. After the pad unit is unfolded, both sides in the short side direction of the pad unit abut against the two inner sides of the outer bag body, and a sealed space is formed between the outer bag body and the pad unit. The packaging bag according to claim 7 or claim 8, characterized in that.

10. Both ends in the longitudinal direction of the pad unit are respectively provided near the inner wall of the opening of the outer bag body, and the center of the pad unit is in the hollow part inside the outer bag body. When the pad unit is unfolded along the storage direction, its center moves to the bottom of the inner bag body. The packaging bag according to claim 7 or 8, characterized in that.

Images