Packaging bag and packaging structure

Abstract

The present disclosure provides a packaging bag and a packaging structure, belonging to the technical field of packaging, which can solve the problem that the existing packaging bag is easily affected by external air pressure changes, causing damage to the liquid crystal display panel therein. The packaging bag of the present disclosure has a fixing area and an air pressure adjusting area; the packaging bag comprises: a first packaging layer and a second packaging layer arranged in the fixing area and the air pressure adjusting area, respectively; the elastic coefficient of the first packaging layer is less than that of the second packaging layer.

Description

Technical Field

[0001] This disclosure belongs to the field of packaging technology, specifically relating to a packaging bag and packaging structure. Background Technology

[0002] Packaging bags are used to package various items and are widely used in daily life and industrial production to facilitate the transportation of goods. For example, in the field of display technology, packaging bags can be used to package and transport finished liquid crystal display panels. Because liquid crystal display panels are sensitive to moisture, bags made of multi-layer composite films are usually used to seal the products during long-distance transportation to ensure their performance.

[0003] Currently, the horizontal or vertical tensile strength of packaging bags is usually not much different. When there is an altitude difference between the customer's location and the product location, the sealed packaging bag cannot maintain its initial fixed state due to the difference in external altitude. This can easily lead to problems such as gas expansion or excessive pressure on the packaging, causing packaging failure and affecting the performance of the LCD display panel inside. Summary of the Invention

[0004] This disclosure aims to solve at least one of the technical problems existing in the prior art by providing a packaging bag and packaging structure.

[0005] In a first aspect, embodiments of this disclosure provide a packaging bag having a fixing area and an air pressure regulating area; the packaging bag includes: a first packaging layer and a second packaging layer respectively disposed in the fixing area and the air pressure regulating area;

[0006] The elastic coefficient of the first packaging layer is less than that of the second packaging layer.

[0007] Optionally, the thickness of the first packaging layer is greater than the thickness of the second packaging layer.

[0008] Optionally, the first packaging layer includes: a first stretch film layer and a multilayer fixing film layer located on the first stretch film layer;

[0009] The second packaging layer includes: a second stretch film layer.

[0010] Optionally, the material of the first stretch film layer includes polyethylene; the material of the fixing film layer includes metal.

[0011] The material of the second stretch film layer includes polyethylene.

[0012] Optionally, the first stretch film layer and the second stretch film layer are integrally formed.

[0013] Optionally, the packaging bag further has an edge region surrounding the fixing area and the air pressure regulating area, and the packaging bag further includes a sealing layer disposed in the edge region;

[0014] The sealing layer includes: a third stretch film layer; the third stretch film layer and the first stretch film layer are integrally formed.

[0015] Optionally, the third stretch film layer is sealed by heat sealing.

[0016] Secondly, embodiments of this disclosure provide a packaging structure, which includes the packaging bag as described above.

[0017] Optionally, the packaging structure further includes: a plurality of support trays stacked inside the packaging bag; the support trays include: protrusions and recesses;

[0018] The first packaging layer is disposed corresponding to the protrusion, and the second packaging layer is disposed corresponding to the recess.

[0019] Optionally, the recess includes: a plurality of support portions;

[0020] The heights of the multiple support portions are equal and less than the height of the protrusion. Attached Figure Description

[0021] Figure 1a This is a schematic diagram of the initial state of an exemplary packaging bag.

[0022] Figure 1b for Figure 1a The diagram shows the inflated state of the packaging bag.

[0023] Figure 1c for Figure 1a The diagram shows the over-compression state of the packaging bag.

[0024] Figure 2 This is a schematic diagram of the planar structure of a packaging bag provided in an embodiment of the present disclosure.

[0025] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the packaging bag along the A-A' direction.

[0026] Figure 4 This is a schematic diagram of a packaging structure provided in an embodiment of the present disclosure.

[0027] Figure 5a This is a schematic diagram of the initial state of a packaging structure provided in an embodiment of this disclosure.

[0028] Figure 5b for Figure 5aA schematic diagram of the inflated state of the packaging structure shown.

[0029] Figure 5c for Figure 5a The diagram shows the over-compression state of the packaging structure. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0032] The packaging bag can be used to package liquid crystal display panels or other items. In the embodiments of this disclosure and the following description, the packaging of liquid crystal display panels will be used as an example for explanation. The implementation principle of packaging other items is similar and will not be described in detail. Furthermore, the application scenarios of the packaging bag are not limited.

[0033] Figure 1a This is a schematic diagram illustrating the initial state of an exemplary packaging bag. Figure 1b for Figure 1a The diagram shown illustrates the inflated state of the packaging bag. Figure 1c for Figure 1a The diagram shown illustrates the over-compression state of the packaging bag. Figure 1a As shown, the packaging bag is typically used in conjunction with multiple support trays, which can be used to support the display panel. In its initial state, the packaging bag is relatively full, and the sealed LCD display panels can be neatly arranged within it. The packaging bag provides good support and packaging for the LCD display panels.

[0034] When a sealed LCD panel is transported from a low-altitude location to a high-altitude location, the packaging bag becomes inflated due to the decrease in external air pressure (e.g., ...). Figure 1b As shown in the figure, this causes some of the support plates to warp up, losing their support and sealing effect on the LCD panel, which can easily damage the LCD panel.

[0035] When a sealed LCD panel is transported from a high-altitude location to a low-altitude location, the increased external air pressure causes the packaging bag to be under excessive pressure (e.g., Figure 1c As shown in the figure, this causes some of the support plates to contract and squeeze the liquid crystal display panel, which can easily damage the liquid crystal display panel.

[0036] To at least solve one of the aforementioned technical problems, this disclosure provides a packaging bag and packaging structure. The packaging bag and packaging structure provided by this disclosure will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0037] In a first aspect, embodiments of this disclosure provide a packaging bag, Figure 2 This is a schematic diagram of the planar structure of a packaging bag provided in an embodiment of the present disclosure. Figure 3 for Figure 2 The diagram shown is a cross-sectional view of the packaging bag along the A-A' direction. Figure 2 and Figure 3 As shown, the packaging bag has a fixing area and an air pressure regulating area; the packaging bag includes a first packaging layer 101 and a second packaging layer 102 respectively disposed in the fixing area and the air pressure regulating area; wherein, the elastic coefficient of the first packaging layer 101 is smaller than the elastic coefficient of the second packaging layer 102. It should be noted that the fixing area in the above-mentioned packaging bag is strip-shaped and intersecting, and the area defined by the intersection is the air pressure regulating area. This design is based on the product being packaged. In practical applications, the shape and arrangement of the fixing area and the air pressure regulating area can be set according to the type of product being packaged and actual needs, which will not be described in detail here.

[0038] In the packaging bag provided in this embodiment, the first packaging layer 101 and the second packaging layer 102 can achieve a sealing effect, isolating moisture and preventing damage to the liquid crystal display panel. The first packaging layer 101 has a low elastic modulus and primarily serves to fix the liquid crystal display panel during packaging and transportation, preventing relative movement. The second packaging layer 102 has a high elastic modulus and can contract or stretch when the external air pressure changes, adjusting the air pressure inside the packaging bag to prevent excessive or insufficient pressure. Therefore, the sealing and support effect of the packaging bag on the liquid crystal display panel can be improved, preventing damage to the liquid crystal display panel due to changes in external air pressure, thereby improving packaging and transportation efficiency and reducing packaging and transportation costs.

[0039] In some embodiments, the thickness of the first packaging layer 101 is greater than the thickness of the second packaging layer 102.

[0040] The first packaging layer 101 can be formed using a thicker film layer, while the second packaging layer 102 can be formed using a thinner film layer. This difference in thickness provides greater shrinkage or stretching space for the second packaging layer 102, ensuring good shrinkage or stretching performance and regulating the air pressure within the packaging bag to prevent excessive or insufficient pressure. Therefore, the sealing and support effect of the packaging bag on the liquid crystal display panel can be improved, preventing damage to the liquid crystal display panel due to changes in external air pressure. This, in turn, improves packaging and transportation efficiency and reduces packaging and transportation costs.

[0041] Specifically, such as Figure 3 As shown, the first packaging layer 101 includes a first stretch film layer 1011 and a multilayer fixing film layer 1012 located on the first stretch film layer 1011; the second packaging layer 102 includes a second stretch film layer 1021.

[0042] The first packaging layer 101 can be a composite film structure consisting of a first stretch film layer 1011 and multiple fixing film layers 1012. The first stretch film layer 1011 can be made of a material with a high elastic modulus, such as polyethylene, while the fixing film layers 1012 can be made of a material with a low elastic modulus, such as metal, specifically aluminum foil. Adjacent first stretch film layers 1011 and fixing film layers 1012, as well as adjacent fixing film layers 1012, are bonded together using adhesives. The composite material structure of the first packaging layer 101 ensures good fixation. During packaging and transportation, it primarily serves to fix the liquid crystal display panel, preventing relative movement during transport. The second packaging layer 102 can be a single-layer film structure consisting of a second stretch film layer 1021, which can be made of a material with a high elastic modulus, such as polyethylene. The second packaging layer 102 is made of a single material with a high elastic modulus, such as a second stretch film layer 1021 made of polyethylene. This ensures that the second packaging layer 102 has good shrinkage and stretching effects. It can shrink or stretch when the external air pressure changes to regulate the air pressure inside the packaging bag and prevent the air pressure inside the packaging bag from being too high or too low. Therefore, it can improve the sealing and support effect of the packaging bag on the liquid crystal display panel, prevent damage to the liquid crystal display panel due to changes in external air pressure, thereby improving packaging and transportation efficiency and reducing packaging and transportation costs.

[0043] It is understood that the materials of the first stretch film layer 1011 and the second stretch film layer 1021, in addition to the polyethylene material mentioned above, can also be other materials with stretching effect. Similarly, the materials of the fixing film layer 1012, in addition to the metal material mentioned above, can also be other materials, which will not be listed here. The implementation principle is similar to that described above, and will not be described in detail here.

[0044] In some embodiments, the first stretch film layer 1011 and the second stretch film layer 1021 are integrally formed structures.

[0045] The first stretch film layer 1011 and the second stretch film layer 1021 can be made of the same material and using the same process. For example, both can be made of polyethylene material and can be integrally molded, which can reduce process steps, reduce process difficulty, and save preparation costs.

[0046] In some embodiments, the packaging bag further has an edge region surrounding the fixing area and the air pressure regulating area, and the packaging bag further includes: a sealing layer 103 disposed in the edge region; the sealing layer 103 includes: a third stretch film layer 1031; the third stretch film layer 1031 and the first stretch film layer 1011 are integrally formed.

[0047] The third stretch film layer 1031 and the first stretch film layer 1011 can be made of the same material and using the same process. For example, both can be made of polyethylene and molded as a single piece, which can reduce process steps, lower process difficulty, and save manufacturing costs. In practical applications, the third stretch film layer 1031 can be sealed by heat sealing to seal the liquid crystal display panel in the packaging bag. Of course, other sealing methods can also be used, such as snap-on sealing, etc., which will not be listed here.

[0048] Secondly, embodiments of this disclosure provide a packaging structure that includes a packaging bag as provided in any of the above embodiments. Figure 4 This is a schematic diagram of a packaging structure provided in an embodiment of the present disclosure, such as... Figure 4 As shown, the packaging structure also includes: a plurality of support trays 104 stacked inside the packaging bag; the support trays 104 include: protrusions 1041 and recesses 1042; the first packaging layer 101 is correspondingly disposed with the protrusions 1041, and the second packaging layer 102 is correspondingly disposed with the recesses 1042.

[0049] The support tray 104 supports the liquid crystal display panel, which is housed in the recess 1042 and surrounded by the protrusions 1041, providing good support and fixation. Generally, the first support tray 104 does not hold the liquid crystal display panel. The protrusions 1041 and recesses 1042 are opposite each other; for example, a recess 1042 can be formed between adjacent protrusions 1041, and a recess 1042 can also be formed on the back of the protrusions 1041. The first packaging layer 101 can be correspondingly arranged with the protrusions 1041, providing good fixation. The second packaging layer 102 can be correspondingly arranged with the recesses 1042, and can contract or stretch when the external air pressure changes to regulate the air pressure inside the packaging bag, preventing excessive or insufficient air pressure. In practical applications, the recessed portion 1042 in the support tray 104 may include multiple support portions 1042a, all of equal height, to form a larger support plane for effective support of the liquid crystal display panel. Furthermore, the height of the support portions 1042a is less than the height of the protrusions 1041 to secure the liquid crystal display panel and prevent relative movement during transportation.

[0050] The implementation principle of the packaging structure provided in the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. Figure 5a This is a schematic diagram of the initial state of a packaging structure provided in an embodiment of this disclosure. Figure 5b for Figure 5a The diagram shows the inflated state of the packaging structure. Figure 5c for Figure 5aThis diagram illustrates the over-compression state of the packaging structure. Figure 5a As shown, in the initial state of the packaging structure, the packaging bag is relatively full, and the sealed LCD display panels can be neatly arranged. The packaging bag can provide good support and packaging effect for the LCD display panels.

[0051] When a sealed LCD panel is transported from a low-altitude location to a high-altitude location, the packaging bag becomes inflated due to the decrease in external air pressure (e.g., ...). Figure 5b As shown in the figure, the second packaging layer 102 is in a stretched state, while the first packaging layer 101 is not affected by the external air pressure and its shape remains basically unchanged, so it can still effectively support the liquid crystal display panel. The second packaging layer 102 can adjust the air pressure inside the packaging bag to avoid damage to the liquid crystal display panel due to changes in external air pressure, thereby ensuring the packaging effect.

[0052] When a sealed LCD panel is transported from a high-altitude location to a low-altitude location, the increased external air pressure causes the packaging bag to be under excessive pressure (e.g., Figure 5c As shown in the figure, the second packaging layer 102 is in a contracted state, the first packaging layer 101 is not affected by the external air pressure, its shape remains basically unchanged, and it can still effectively support the liquid crystal display panel. The second packaging layer 102 can regulate the air pressure inside the packaging bag, so as to avoid damage to the liquid crystal display panel due to changes in external air pressure, thereby ensuring the packaging effect.

[0053] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A packaging bag, characterized in that, The packaging bag has a fixing area and an air pressure regulating area; the packaging bag includes: a first packaging layer and a second packaging layer respectively disposed in the fixing area and the air pressure regulating area; The elastic coefficient of the first packaging layer is less than that of the second packaging layer.

2. The packaging bag according to claim 1, characterized in that, The thickness of the first packaging layer is greater than the thickness of the second packaging layer.

3. The packaging bag according to claim 2, characterized in that, The first packaging layer includes: a first stretch film layer, and a multilayer fixing film layer located on the first stretch film layer; The second packaging layer includes: a second stretch film layer.

4. The packaging bag according to claim 3, characterized in that, The material of the first stretch film layer includes polyethylene; the material of the fixed film layer includes metal. The material of the second stretch film layer includes polyethylene.

5. The packaging bag according to claim 3, characterized in that, The first stretch film layer and the second stretch film layer are integrally formed.

6. The packaging bag according to claim 5, characterized in that, The packaging bag also has an edge region surrounding the fixing area and the air pressure regulating area, and the packaging bag further includes a sealing layer disposed in the edge region; The sealing layer includes: a third stretch film layer; the third stretch film layer and the first stretch film layer are integrally formed.

7. The packaging bag according to claim 6, characterized in that, The third stretch film layer is sealed by heat sealing.

8. A packaging structure, characterized in that, The packaging structure includes the packaging bag as described in any one of claims 1 to 7.

9. The packaging structure according to claim 8, characterized in that, The packaging structure further includes: a plurality of support trays stacked inside the packaging bag; the support trays include: protrusions and recesses; The first packaging layer is disposed corresponding to the protrusion, and the second packaging layer is disposed corresponding to the recess.

10. The packaging structure according to claim 9, characterized in that, The recessed portion includes: multiple support portions; The heights of the multiple support portions are equal and less than the height of the protrusion.

Images