Display packaging bag and manufacturing method therefor

Abstract

Disclosed in the present application are a display packaging bag and a manufacturing method therefor. The manufacturing method comprises: providing at least one display window in continuously conveyed bag paper, and applying a heat-sealing adhesive to a peripheral area of the display window, a bonding position on a side surface of each packaging bag, and sealing strip positions; attaching transparent paper to the display window and performing heating, such that the transparent paper tightly adheres to the bag paper; adding elongated sealing strips to the inner side of the continuously conveyed double-layer bag paper; heating the double-layer bag paper, so as to seal the side surface of each packaging bag and sealing strip positions; and cutting the sealed double-layer bag paper, so as to obtain individual display packaging bags. The manufacturing method for a display packaging bag can process continuously conveyed bag paper to obtain a display window, and attach transparent paper to the display window, such that continuous production of display packaging bags is realized, thereby greatly improving the production efficiency and product quality of the display packaging bags.

Description

Display packaging bags and their manufacturing methods

[0001] This application is based on and claims priority to Chinese Patent Application No. 202410983580.4, filed on July 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of packaging bags, and more particularly to a display packaging bag and a method for manufacturing the same. Background Technology

[0003] To improve packaging quality, packaging bags are typically made of opaque materials. However, consumers often want to see the contents before purchasing. To address this, display windows can be added to the packaging bags. Producing bags with display windows requires first cutting the bag body and creating the display window, then sealing the window with a transparent film to obtain the complete bag. However, current techniques usually involve producing individual display bags separately. Because the manufacturing process for this type of bag is complex, producing a single bag is time-consuming, resulting in low efficiency. Therefore, existing techniques suffer from low efficiency in producing display packaging bags. Application content

[0004] This application provides a display packaging bag and a method for manufacturing the same, aiming to solve the problem of low efficiency in the production of display packaging bags using existing methods.

[0005] In a first aspect, embodiments of this application provide a method for manufacturing a display packaging bag, wherein the method includes:

[0006] At least one display window is provided on the continuously conveyed paper bag; the display window is either continuous along the conveying direction or partially closed.

[0007] Heat-sealing adhesive is applied to the area surrounding the display window on the bag paper;

[0008] Transparent paper is attached to the display window and heated to ensure it adheres tightly to the bag paper.

[0009] A long strip sealing strip is added to the inside of the continuously conveyed double-layer bag paper; the double-layer bag paper is formed by covering another bag paper on top of the bag paper with transparent paper attached, or by folding the bag paper with transparent paper attached in half; the transparent paper is sandwiched between the double-layer bag paper;

[0010] Heat-sealing adhesive is applied to the adhesive areas and sealing strips on the sides of each packaging bag on the double-layered bag paper.

[0011] Heating the double-layered paper bag seals the sides and sealing strip of the packaging bag.

[0012] The sealed double-layered paper bag is cut to obtain individual display packaging bags.

[0013] Secondly, this application embodiment also provides a display packaging bag, which is manufactured by the manufacturing method described in the first aspect above, wherein the display packaging bag includes a first bag of paper and a second bag of paper arranged opposite to and overlapping each other, and a sealing strip is disposed between the first bag of paper and the second bag of paper;

[0014] A display window is provided on the first bag of paper and / or the second bag of paper. Each display window is covered with a transparent sheet, and the transparent sheet is sandwiched between the two layers of paper and is tightly attached to the periphery of the display window.

[0015] The sealing strip includes a strip-shaped groove and a strip-shaped protrusion disposed on the first bag paper; the strip-shaped groove and the strip-shaped protrusion are disposed opposite to each other and are both disposed at the opening of the display packaging bag;

[0016] The non-opening sides of the display packaging bag are all sealed, and the sealing edge is obtained by bonding the side of the first bag paper to the side of the second bag paper.

[0017] This application provides a display packaging bag and its manufacturing method. The manufacturing method includes: opening at least one display window on a continuously conveyed bag paper, and applying heat-sealing adhesive to the surrounding area of ​​the display window, the adhesive area on the side of the packaging bag, and the sealing strip; covering the display window with transparent paper and heating it to ensure a tight bond between the transparent paper and the bag paper; adding a long strip sealing strip to the inside of the continuously conveyed double-layer bag paper; heating the double-layer bag paper to seal the side of the packaging bag and the sealing strip; and cutting the sealed double-layer bag paper to obtain a single display packaging bag. This manufacturing method for display packaging bags enables the continuous production of display packaging bags by processing continuously conveyed bag paper to obtain a display window and covering it with transparent paper, thereby significantly improving the production efficiency and product quality of display packaging bags. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a flowchart of a method for manufacturing a packaging bag according to an embodiment of this application;

[0020] Figure 2 is a manufacturing state diagram of the packaging bag provided in the embodiment of this application;

[0021] Figure 3 is another manufacturing state diagram of the packaging bag provided in the embodiment of this application;

[0022] Figure 4 is a diagram showing another manufacturing state of the packaging bag provided in an embodiment of this application;

[0023] Figure 5 is a schematic diagram of the manufacturing process of the packaging bag provided in the embodiment of this application;

[0024] Figure 6 is another manufacturing state diagram of the packaging bag provided in the embodiment of this application;

[0025] Figure 7 is a diagram showing another manufacturing state of the packaging bag provided in an embodiment of this application;

[0026] Figure 8 is a diagram showing the remanufacturing state of the packaging bag provided in the embodiment of this application;

[0027] Figure 9 is a diagram showing the final manufacturing state of the packaging bag provided in the embodiments of this application;

[0028] Figure 10 is a subsequent manufacturing state diagram of the packaging bag provided in the embodiment of this application;

[0029] Figure 11 is a subsequent manufacturing state diagram of the packaging bag provided in the embodiment of this application;

[0030] Figure 12 is a diagram showing the subsequent manufacturing state of the packaging bag provided in the embodiment of this application;

[0031] Figure 13 is a diagram showing the latter manufacturing state of the packaging bag provided in the embodiment of this application;

[0032] Figure 14 is a diagram showing the next manufacturing state of the packaging bag provided in the embodiment of this application;

[0033] Figure 15 is a structural diagram of the packaging bag provided in an embodiment of this application;

[0034] Figure 16 is another structural diagram of the packaging bag provided in an embodiment of this application;

[0035] Figure 17 is another structural diagram of the display packaging bag provided in the embodiment of this application;

[0036] Figure 18 is another structural diagram of the packaging bag provided in the embodiment of this application;

[0037] Figure 19 is a cross-sectional view of the packaging bag provided in the embodiment of this application.

[0038] Reference numerals: 10, paper bag; 101, first paper bag; 102, second paper bag; 11, display window; 12, heat sealant; 13, transparent paper; 14, edge sealing; 15, through hole; 20, sealing strip; 21, strip groove; 22, strip protrusion; 23, connecting film. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0041] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0043] In this embodiment, please refer to Figure 1. As shown in the figure, this application embodiment provides a method for manufacturing a display packaging bag, wherein the method includes steps S110 to S170.

[0044] S110. At least one display window is opened on the continuously conveyed paper bag.

[0045] The paper bag 10 is continuously conveyed by mechanical equipment, such as rollers on both sides of the paper bag 10. By rotating the rollers, the paper bag 10 is continuously conveyed horizontally, as shown in Figure 2. At least one display window 11 is opened on the continuously conveyed paper bag 10. The display window 11 is either continuous along the conveying direction or partially closed.

[0046] Specifically, the display window 11 on the single-layer bag paper 10 can be as shown in Figure 3 or Figure 4, in which case the display window 11 extends through the conveying direction. The specific manufacturing process for creating this display window 11 is shown in Figure 5. Two side-by-side cutters are used to cut the continuously conveyed bag paper 10, thus removing the portion of bag paper 10 between the two cutters, thereby obtaining the display window 11 extending through the conveying direction. Alternatively, the display window 11 on the single-layer bag paper 10 can also be as shown in Figure 7, in which case the display window 11 forms a partially closed structure.

[0047] The bag paper 10 can be continuously conveyed in a single layer and the display window 11 can be opened in a double layer. For cutting one of the single layers of the double-layer bag paper 10 to form a partially closed display window 11, refer to the applicant's previously filed patent "Bag Material Cutting Device and Bag Manufacturing Method," patent application number "202410392756.9". For cutting one of the single layers of the double-layer bag paper 10 to form a display window 11 extending along the conveying direction, refer to the applicant's previously filed patent "Dustproof Bag Production Device for Continuous Production," patent application number "202311521727.X" (this patent uses a single-blade cutting method; two parallel cutting blades can be used for cutting).

[0048] S120. Apply heat-sealing adhesive to the area surrounding the display window on the bag paper.

[0049] Heat-sealing adhesive 12 is applied to the periphery of the display window 11 on the bag paper 10. The structure of one side of the bag paper 10 coated with heat-sealing adhesive 12 is shown in Figures 6 and 7. Figure 6 corresponds to a display window 11 extending along the conveying direction on the bag paper 10, and Figure 7 corresponds to a display window 11 with a partially closed structure on the bag paper 10. For a single-layer bag paper 10, heat-sealing adhesive 12 can be applied directly. For a double-layer bag paper 10, heat-sealing adhesive 12 needs to be applied to the side of the bag paper 10 facing the other bag paper 10 where the display window 11 is located. The heat-sealing adhesive 12 spreads rapidly upon heating and adheres and seals the bag paper 10. In a more specific embodiment, the heat-sealing adhesive 12 is a water-soluble heat-sealing adhesive 12. Using water-soluble heat-sealing adhesive 12 increases the bonding effect on the bag paper 10, thereby increasing the sealing performance of the bag paper 10 after bonding.

[0050] S130. Cover the display window with transparent paper and heat it to make the transparent paper adhere tightly to the bag paper.

[0051] Transparent paper 13 is attached to the display window 11. The structure after attaching transparent paper 13 to the display window 11 is shown in Figure 8. Heating is then applied to ensure the transparent paper 13 adheres tightly to the bag paper 10. The structure of the bag paper 10 on the side opposite to where the transparent paper 13 is attached is shown in Figure 9. Furthermore, the transparent paper 13 can be attached inside the display window 11, so that for a double-layered bag paper 10, the transparent paper 13 is located between the two layers. Specifically, the transparent paper 13 is transparent fiber paper; the bag paper 10 is non-transparent fiber paper. The transparent paper 13 can be made of transparent fiber paper, and the bag paper 10 can be made of non-transparent fiber paper. The transparent fiber paper portion allows light to pass through and displays the product inside the packaging bag, while also increasing the overall structural strength of the packaging bag.

[0052] Specifically, the display window 11 is a long strip window extending along the conveying direction, and the width of the display window 11 is 1.2-6cm. The transparent paper 13 is also a long strip of transparent paper extending along the conveying direction. The width of the long strip display window 11 extending along the conveying direction can be set to 1.2-6cm. In this case, the transparent paper 13 also needs to be set to a long strip of transparent paper extending along the conveying direction. Therefore, the width of the long strip of transparent paper 13 is slightly larger than the width of the display window 11. For example, the width of the long strip of transparent paper 13 can be set to 1.15-1.4 times the width of the display window 11.

[0053] Alternatively, the display window 11 may be a partially enclosed window, and the display window 11 may be circular, elliptical, rectangular, polygonal, or rounded rectangular. The transparent paper 13 may be a long strip of transparent paper extending along the conveying direction or a non-through transparent paper 13 that independently covers the display window 11. For the case where the display window 11 is a partially enclosed window, the transparent paper 13 can be a long strip of transparent paper extending along the conveying direction, thus partially covering the display window 11; alternatively, the transparent paper 13 can be a non-through transparent paper that independently covers the display window 11, thus covering only one display window 11. For example, for a circular display window 11, a corresponding circular non-through transparent paper 13 can be used to cover the display window 11.

[0054] Specifically, the heating temperature is 120-300℃, and the heating time is 1-4 seconds. During the heating process, the pressure applied to the bag paper is 10-24 kg / dm². 2 .

[0055] To achieve bonding of the transparent paper 13 and the bag paper 10 using the heat-sealing adhesive 12, the bonding area of ​​the transparent paper 13 and the bag paper 10 can be heated. The specific heating temperature is 120-300℃, and the heating time is 1-4 seconds. After heating, the heat-sealing adhesive 12 diffuses into the transparent paper 13 and the bag paper 10, achieving a tight bond. Furthermore, to improve the bonding effect between the transparent paper 13 and the bag paper 10, the transparent paper 13 and the bag paper 10 can be pressed together while heating, with an applied pressure of 10-24 kg / dm². 2 .

[0056] S140. Add a long strip sealing strip to the inside of the continuously conveyed double-layer paper bag.

[0057] A long strip sealing strip 20 is added to the inside of the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is formed by covering another bag paper 10 on top of the bag paper 10 with the transparent paper 13 attached, or by folding the bag paper 10 with the transparent paper 13 attached in half; the transparent paper 13 is sandwiched between the double-layer bag paper 10.

[0058] Steps S110 to S130 can involve processing and manufacturing a single-layer bag paper 10 separately, or processing and manufacturing one of the single-layer bag paper 10s in a double-layer bag paper 10. If processing and manufacturing a single-layer bag paper 10 separately, another bag paper 10 can be placed on top of the bag paper 10 with the transparent paper 13 to form a double-layer bag paper 10, or the bag paper 10 with the transparent paper 13 can be folded in half (as shown in Figure 4, the bag paper 10 is folded in half along the horizontal center line to form a double-layer bag paper 10). Steps S110 to S130 can also involve processing and manufacturing one of the single-layer bag paper 10s in a double-layer bag paper 10, that is, first folding the bag paper 10 in half or first overlapping two bags paper 10s to form a double-layer bag paper 10, and then performing steps S110 to S130.

[0059] A long strip sealing strip 20 is added to the inner side of the continuously conveyed double-layer paper bag 10. When the double-layer paper bags 10 are aligned and continuously conveyed, there is a gap between them. The long strip sealing strip 20 can be inserted into this gap, allowing the double-layer paper bags 10 and the long strip sealing strip 20 to be stacked and combined. The process of inserting the long strip sealing strip 20 into the gap between the double-layer paper bags 10 is shown in Figure 10, and the structure of the double-layer paper bag 10 with the long strip sealing strip 20 fully inserted is shown in Figure 11.

[0060] S150. Apply heat-sealing adhesive to the pasting area and sealing strip on the side of each packaging bag on the double-layer bag paper.

[0061] Heat-sealing adhesive 12 is applied to the adhesive areas on the sides of each packaging bag and the sealing strip 20 of the double-layer bag paper 10. Heat-sealing adhesive 12 is also applied to the adhesive areas on the sides of each packaging bag and the sealing strip 20 of the double-layer bag paper 10. When two bags 10 are overlapped to form a double-layer bag paper 10, in addition to applying heat-sealing adhesive 12 to the sealing strip 20, heat-sealing adhesive 12 needs to be applied to the adhesive areas on both sides and the bottom of each packaging bag. The structure after applying heat-sealing adhesive 12 is shown in Figure 12. When the bag paper 10 is folded in half to form a double-layer bag paper 10, in addition to applying heat-sealing adhesive 12 to the sealing strip 20, heat-sealing adhesive 12 only needs to be applied to the adhesive areas on both sides of each packaging bag. The structure after applying heat-sealing adhesive 12 is shown in Figure 13. The sealing strip 20 has a certain distance from the edge of the upper bag paper 10. The distance between the sealing strip 20 and the edge of the upper bag paper 10 can be 0.5-2 times the width of the sealing strip 20.

[0062] S160. Heating the double-layered paper bag to seal the sides and sealing strip of the packaging bag.

[0063] Heating the double-layered paper bag 10 seals the sides of the packaging bag and the sealing strip 20, thus forming the sealing edge 14.

[0064] Furthermore, before cutting the sealed double-layer bag paper 10 to obtain a single display packaging bag, the method further includes: opening a through hole 15 on the double-layer bag paper 10 above the sealing strip 20. The specific structure after opening the through hole 15 on the double-layer bag paper 10 above the sealing strip 20 is shown in Figure 14. The through hole 15 can be used to hang the packaging bag on a horizontally arranged support rod, which facilitates the display and sale of the items inside the packaging bag.

[0065] S170. Cut the sealed double-layer paper bag to obtain a single display packaging bag.

[0066] The sealed double-layered paper bag 10 is cut to obtain a single display packaging bag. The double-layered paper bag 10 is cut using a cutter perpendicular to the conveying direction. This cutter cuts the joint between adjacent display packaging bags, separating them into individual display packaging bags. The resulting single display packaging bags are shown in Figures 15 and 18. Figure 15 shows the case where two sheets of paper bag 10 are overlapped to form a double-layered paper bag 10, and Figure 18 shows the case where the paper bag 10 is folded in half to form a double-layered paper bag 10.

[0067] Furthermore, during the cutting process of the sealed double-layer bag paper 10, the top corners of the display packaging bag can be rounded simultaneously to obtain the bag structure shown in Figure 17. For the case where two bags 10 are overlapped to form a double-layer bag paper 10, the excess portion of the bag at the bottom can be cut off to obtain the bag structure shown in Figure 16.

[0068] Steps S110 to S170 are all performed during the continuous conveying of the paper bag 10, which means that the display packaging bag can be manufactured during continuous conveying, greatly improving the production efficiency of the packaging bag.

[0069] This application also discloses a display packaging bag, which is manufactured by the manufacturing method described in the above embodiments. The display packaging bag includes a first bag paper 101 and a second bag paper 102 that are arranged opposite to and overlap each other. A sealing strip 20 is disposed between the first bag paper 101 and the second bag paper 102. Display windows 11 are opened on the first bag paper 101 and / or the second bag paper 102. Each display window 11 is covered with a transparent paper 13, and the transparent paper 13 is sandwiched between the two layers of bag paper and is tightly fitted to the periphery of the display window 11. The sealing strip 20 includes a strip-shaped groove 21 and a strip-shaped protrusion 22 disposed on the first bag paper 101. The strip-shaped groove 21 and the strip-shaped protrusion 22 are arranged opposite to each other and are both disposed at the opening of the display packaging bag. The non-opening side of the display packaging bag is provided with a sealing edge 14, which is obtained by bonding the side of the first bag paper 101 and the side of the second bag paper 102.

[0070] Please refer to Figure 19. As shown in the figure, the display packaging bag includes a first bag paper 101 and a second bag paper 102 that are arranged opposite to and overlap each other. A sealing strip 20 is disposed between the first bag paper 101 and the second bag paper 102. The sealing strip 20 includes a strip-shaped groove 21 and a strip-shaped protrusion 22 disposed on the first bag paper 101. The strip-shaped groove 21 and the strip-shaped protrusion 22 are arranged opposite to each other and are both disposed at the opening of the display packaging bag. The non-opening side of the display packaging bag is provided with a sealing edge 14, which is obtained by bonding the side of the first bag paper 101 and the side of the second bag paper 102 together.

[0071] Specifically, the sealing strip 20 includes a strip-shaped groove 21 and a strip-shaped protrusion 22. To improve the stability of the adhesion between the sealing strip 20 and the bag paper (first bag paper 101 or second bag paper 102), a wider connecting film 23 can be provided on the side of the sealing strip 20 closest to the bag paper. The width of the connecting film 23 is 3-10 times the width of the sealing strip 20. The connecting film 23 is bonded and fixed to the bag paper using heat-sealing adhesive 12, thereby achieving a stable fixation between the sealing strip 20 and the bag paper. By providing the connecting film 23, the area for bonding and fixing the sealing strip 20 to the hot air curtain on the bag paper can be increased, thereby improving the stability of the adhesion between the sealing strip 20 and the bag paper.

[0072] To improve the tightness of the engagement between the strip groove 21 and the strip protrusion 22, a buckle is provided on the side of the strip protrusion 22 facing the strip groove 21, and the width of the outer opening of the strip groove 21 is set to be smaller than the width of the bottom of the strip groove 21, as shown in Figure 19. The above structure can greatly improve the tightness of the engagement between the strip groove 21 and the strip protrusion 22, that is, improve the sealing performance of the sealing strip 20 in sealing the opening of the display packaging bag.

[0073] Users can first tear off the sealing edge 14 above the sealing strip 20 (the sealing edge 14 formed by the bonding of the first bag body and the second bag body), and then use external force to disengage the strip groove 21 from the strip protrusion 22, thereby opening the packaging bag and taking out the items contained therein from the opening of the display packaging bag.

[0074] This application provides a display packaging bag and its manufacturing method. The manufacturing method includes: opening at least one display window on a continuously conveyed bag paper, and applying heat-sealing adhesive to the surrounding area of ​​the display window, the adhesive area on the side of the packaging bag, and the sealing strip; attaching transparent paper to the display window and heating it to ensure a tight bond between the transparent paper and the bag paper; adding a long strip sealing strip to the inside of the continuously conveyed double-layer bag paper; heating the double-layer bag paper to seal the side of the packaging bag and the sealing strip; and cutting the sealed double-layer bag paper to obtain a single display packaging bag. This method of manufacturing display packaging bags enables the continuous production of display packaging bags by processing continuously conveyed bag paper to obtain a display window and attaching transparent paper, thereby significantly improving the production efficiency and product quality of display packaging bags.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of manufacturing a display package, characterized by, The manufacturing method comprises: opening at least one display window on the continuously conveyed bag paper; the display window is through or partially closed along the conveying direction; applying heat-seal glue on the peripheral area of the display window on the bag paper; applying transparent paper to the display window and heating to tightly adhere the transparent paper to the bag paper; adding a long strip-shaped sealing strip on the inner side of the continuously conveyed double-layer bag paper; the double-layer bag paper is another bag paper layered on the bag paper with the transparent paper or the bag paper with the transparent paper is folded in half; the transparent paper is sandwiched between the double-layer bag paper; applying heat-seal glue on the double-layer bag paper at the side of each packaging bag and the sealing strip; heating the double-layer bag paper to seal the side of the packaging bag and the sealing strip; cutting the sealed double-layer bag paper to obtain single display packaging bags.

2. The method of manufacturing a display packaging bag according to claim 1, characterized by, The heat-seal glue is water-soluble heat-seal glue.

3. The method of manufacturing a display packaging bag according to claim 2, characterized by, The heating temperature is 120-300℃, and the heating time is 1-4 seconds.

4. The method of manufacturing a display packaging bag according to claim 3, characterized by, The pressure applied to the sack paper during heating is 10-24 kg / dm 2 .

5. The method of manufacturing a display package according to any one of claims 1 to 4, characterized in that, Before cutting the sealed double-layer bag paper to obtain single display packaging bags, the method further comprises: opening a through hole above the sealing strip on the double-layer bag paper.

6. A display package produced by the production method according to any one of claims 1 to 5, characterized in that, The display packaging bag comprises a first bag paper and a second bag paper arranged oppositely and overlapping each other, and a sealing strip arranged between the first bag paper and the second bag paper; a display window is opened on the first bag paper and / or the second bag paper, and a piece of transparent paper is applied to each display window, and the transparent paper is sandwiched between the double-layer bag paper and tightly adheres to the peripheral area of the display window; the sealing strip comprises a strip-shaped groove arranged on the first bag paper and a strip-shaped protrusion arranged on the first bag paper; the strip-shaped groove and the strip-shaped protrusion are arranged oppositely and are arranged at the opening of the display packaging bag; the non-opening side of the display packaging bag is provided with an edge, and the edge is obtained by bonding the side of the first bag paper and the side of the second bag paper.

7. The display package of claim 6, wherein The transparent paper is transparent fiber paper, and the bag paper is non-transparent fiber paper.

8. The display package of claim 6 or 7, wherein, The display window is a long strip-shaped window through along the conveying direction, the width of the display window is 1.2-6cm, and the transparent paper is a long strip-shaped transparent paper through along the conveying direction.

9. The display package of claim 6 or 7, wherein, The display window is a partially closed window, and the display window is circular, elliptical, rectangular, polygonal or round rectangular.

10. The display package of claim 9, wherein, The transparent paper is a long strip-shaped transparent paper through along the conveying direction or a non-through transparent paper independently covering the display window.

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