Display packaging bag

Abstract

The utility model discloses a display packaging bag which comprises first bag paper and second bag paper which are oppositely arranged and overlapped, and a sealing strip is arranged between the first bag paper and the second bag paper. The first bag paper and / or the second bag paper are / is provided with display windows, each display window is correspondingly provided with a piece of transparent paper in an attached mode, and the transparent paper is clamped between the double-layer bag paper and tightly attached to the peripheral area of the display window; the sealing strip comprises a strip-shaped groove formed in 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 oppositely arranged and are both arranged at an opening of the display packaging bag. The non-open side faces of the display packaging bag are provided with sealing edges, and the sealing edges are obtained by bonding the side face of the first bag paper and the side face of the second bag paper. According to the display packaging bag, products contained in the packaging bag can be displayed through the transparent paper, and the display packaging bag can be manufactured through continuously conveyed bag paper.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to a display packaging bag. Background Art

[0002] To improve the packaging quality, packaging bags are usually made of opaque materials. However, consumers hope to view the items inside the packaging bags before purchase. To solve this problem, a display window can be opened on the packaging bag. To produce a packaging bag with a display window, it is necessary to first cut the bag body of the packaging bag and open the display window, and then use a transparent film to seal the display window to obtain a complete packaging bag. However, in the existing technical methods, usually a single packaging bag with a display function is independently produced. Since the manufacturing process of this type of packaging bag is relatively complex and it takes a long time to produce a single packaging bag, the efficiency of independently producing the packaging bag is low. Therefore, the existing technical methods have the problem of low efficiency when producing display packaging bags. Summary of the Utility Model

[0003] An embodiment of the utility model provides a display packaging bag, aiming to solve the problem of low efficiency existing in the existing technical methods when producing display packaging bags.

[0004] In a first aspect, an embodiment of the utility model provides a manufacturing method of a display packaging bag, wherein the method includes:

[0005] Opening at least one display window on a continuously conveyed bag paper; the display window penetrates along the conveying direction or is a partially closed structure;

[0006] Coating hot melt adhesive on the peripheral area of the bag paper where the display window is located;

[0007] Sticking a transparent paper on the display window and heating to make the transparent paper closely adhere to the bag paper;

[0008] Adding a long strip-shaped sealing strip inside the continuously conveyed double-layer bag paper; the double-layer bag paper is covering another bag paper on the upper layer of the bag paper where the transparent paper is adhered or folding the bag paper where the transparent paper is adhered in half; the transparent paper is clamped between the double-layer bag paper;

[0009] Coating hot melt adhesive on the pasting place and the sealing strip place on each side of the packaging bag on the double-layer bag paper;

[0010] Heating the double-layer bag paper to seal the side and the sealing strip place of the packaging bag;

[0011] Cutting the sealed double-layer bag paper to obtain a single display packaging bag.

[0012] Second aspect, embodiments of the present utility model further provide a display packaging bag, which is manufactured by the manufacturing method as described in the first aspect above. Among them, the display packaging bag includes a first bag paper and a second bag paper that are oppositely arranged and overlapped, and a sealing strip is arranged between the first bag paper and the second bag paper;

[0013] A display window is opened on the first bag paper and / or the second bag paper, and a transparent paper is correspondingly attached to each display window, and the transparent papers are all clamped between the double-layer bag papers and closely adhered to the peripheral area of the display window;

[0014] The sealing strip includes 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 oppositely arranged and are both arranged at the opening of the display packaging bag;

[0015] Sealing edges are provided on the non-opening sides of the display packaging bag, and the sealing edges are obtained by bonding the side surface of the first bag paper and the side surface of the second bag paper.

[0016] Embodiments of the present utility model provide a display packaging bag. The display packaging bag includes a first bag paper and a second bag paper that are oppositely arranged and overlapped, and a sealing strip is 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 transparent paper is correspondingly attached to each display window, and the transparent papers are all clamped between the double-layer bag papers and closely adhered to the peripheral area of the display window; the sealing strip includes 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 oppositely arranged and are both arranged at the opening of the display packaging bag; sealing edges are provided on the non-opening sides of the display packaging bag, and the sealing edges are obtained by bonding the side surface of the first bag paper and the side surface of the second bag paper. The above display packaging bag can display the products contained in the packaging bag through the transparent paper and can be manufactured by continuously conveying the bag paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of the manufacturing method of the display packaging bag provided by the embodiment of the present utility model;

[0019] Figure 2 It is a manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0020] Figure 3 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0021] Figure 4 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of the manufacturing process of the display packaging bag provided by the embodiment of the present utility model;

[0023] Figure 6 Yet another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0024] Figure 7 Yet another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0025] Figure 8 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0026] Figure 9 The subsequent manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0027] Figure 10 Another subsequent manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0028] Figure 11 Yet another subsequent manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0029] Figure 12 Another subsequent manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0030] Figure 13 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0031] Figure 14 The subsequent next manufacturing state diagram of the display packaging bag provided by the embodiment of the present utility model;

[0032] Figure 15 Structural diagram of the display packaging bag provided by the embodiment of the present utility model;

[0033] Figure 16 Another structural diagram of the display packaging bag provided by the embodiment of the present utility model;

[0034] Figure 17 Yet another structural diagram of the display packaging bag provided by the embodiment of the present utility model;

[0035] Figure 18Another structural diagram of the display packaging bag provided by the embodiment of the present utility model;

[0036] Figure 19 A sectional structural diagram of the display packaging bag provided by the embodiment of the present utility model.

[0037] Reference numerals: 10, bag paper; 101, first bag paper; 102, second bag paper; 11, display window; 12, hot melt adhesive; 13, transparent paper; 14, seal edge; 15, through hole; 20, sealing strip; 21, strip-shaped groove; 22, strip-shaped protrusion; 23, connecting film. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0040] It should also be understood that the terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0041] It should be further understood that the term " / and" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] In this embodiment, please refer to Figure 1 , as shown in the figure, the embodiment of the present utility model provides a manufacturing method of a display packaging bag, wherein the method includes steps S110 to S170.

[0043] S110, open at least one display window on the continuously conveyed bag paper.

[0044] The bag paper 10 is continuously conveyed by mechanical equipment. For example, rollers can be arranged on both sides of the bag paper 10, and by rotating the rollers, the bag paper 10 can be horizontally and continuously conveyed. The bag paper 10 is as Figure 2 shown; at least one display window 11 is opened on the continuously conveyed bag paper 10, and the display window 11 penetrates along the conveying direction or is a partially enclosed structure.

[0045] Specifically, the display window 11 opened on the single-layer bag paper 10 can be as Figure 3 or Figure 4 shown, and then the display window 11 penetrates along the conveying direction. The specific manufacturing process of opening this display window 11 is as Figure 5 shown. Two cutting knives arranged side by side can be used to cut the continuously conveyed bag paper 10, and the part of the bag paper 10 between the two cutting knives is cut off, so as to obtain a display window 11 that penetrates along the conveying direction. The display window 11 opened on the single-layer bag paper 10 can also be as Figure 7 shown, and then the display window 11 forms a partially enclosed structure.

[0046] The bag paper 10 can be continuously conveyed in a single layer and the display window 11 can be opened, or it can be continuously conveyed in a double layer and the display window 11 can be opened; for cutting one of the single-layer bag papers 10 of the double-layer bag paper 10 to form a display window 11 with a partially enclosed structure, reference can be made to the patent "Bag Material Cutting Device and Manufacturing Method of Bag Body" applied by the applicant before, and the patent application number is "202410392756.9". For cutting one of the single-layer bag papers 10 of the double-layer bag paper 10 to form a display window 11 that penetrates along the conveying direction, reference can be made to the patent "Dust-proof Bag Production Device for Continuous Production" applied by the applicant before, and the patent application number is "202311521727.X" (in this patent, it is a single cutting knife for cutting, and setting two parallel cutting knives for cutting can achieve this).

[0047] S120. Coat hot melt adhesive on the peripheral area of the bag paper located at the display window.

[0048] Coat hot melt adhesive 12 on the peripheral area of the bag paper 10 located at the display window 11. The structure of one side of the bag paper 10 coated with the hot melt adhesive 12 is as Figure 6 and Figure 7 shown, where Figure 6 corresponds to opening a display window 11 that penetrates along the conveying direction on the bag paper 10, Figure 7A display window 11 with a partial closed structure is correspondingly formed on the bag paper 10. A heat-sealing adhesive 12 is coated on the peripheral area of the display window 11. For a single-layer bag paper 10, the heat-sealing adhesive 12 can be directly coated. For a double-layer bag paper 10, the heat-sealing adhesive 12 needs to be coated on the side of the bag paper 10 where the display window 11 is provided, facing the other bag paper 10. When the heat-sealing adhesive 12 is heated, it quickly spreads and adhesively seals the bag paper 10. In a more specific embodiment, the heat-sealing adhesive 12 is a water-soluble heat-sealing adhesive 12. The water-soluble heat-sealing adhesive 12 can be used to increase the effect of bonding the bag paper 10, thereby increasing the sealing performance after the bag paper 10 is bonded.

[0049] S130. Stick the transparent paper on the display window and heat it to make the transparent paper closely fit the bag paper.

[0050] Stick the transparent paper 13 on the display window 11. The structure after the transparent paper 13 is stuck on the display window 11 is as Figure 8 shown; heat it to make the transparent paper 13 closely fit the bag paper 10. At this time, the structure of the bag paper 10 on the side away from the side where the transparent paper 13 is stuck is as Figure 9 shown. Further, the transparent paper 13 can be stuck inside the display window 11. For the double-layer bag paper 10, the transparent paper 13 is located between the double-layer bag papers 10. Specifically, the transparent paper 13 is a transparent fiber paper; the bag paper 10 is an opaque fiber paper. The transparent paper 13 can be set as a transparent fiber paper, and the bag paper 10 can be set as an opaque fiber paper. The transparent fiber paper part can transmit light and display the products in the packaging bag, and the fiber paper can increase the overall structural strength of the packaging bag.

[0051] Specifically, the display window 11 is a long strip-shaped window that penetrates along the conveying direction. The width of the display window 11 is 1.2 - 6 cm, and the transparent paper 13 is a long strip-shaped transparent paper 13 that penetrates along the conveying direction. The width of the long strip-shaped display window 11 that penetrates along the conveying direction can be set to 1.2 - 6 cm. At this time, it is necessary to synchronously set the transparent paper 13 as a long strip-shaped transparent paper 13 that penetrates along the conveying direction. Then, the width of the long strip-shaped transparent paper 13 is slightly larger than the width of the display window 11. For example, the width of the long strip-shaped transparent paper 13 can be set to 1.15 - 1.4 times the width of the display window 11.

[0052] Alternatively, the display window 11 is a window with a partially enclosed structure, and the display window 11 is circular, oval, rectangular, polygonal, or rounded rectangular. Among them, the transparent paper 13 is a strip-shaped transparent paper 13 that penetrates along the conveying direction or a non-penetrating transparent paper 13 that independently covers the display window 11. For the case where the display window 11 is a window with a partially enclosed structure, the transparent paper 13 can be set as a strip-shaped transparent paper 13 that penetrates along the conveying direction, and then the strip-shaped transparent paper 13 can penetrate and cover part of the display window 11; it can also be set that the transparent paper 13 is a non-penetrating transparent paper 13 that independently covers the display window 11, and then the non-penetrating transparent paper 13 covers a display window 11 alone. For example, for a circular display window 11, a circular non-penetrating transparent paper 13 can be correspondingly set to cover the display window 11.

[0053] Specifically, the heating temperature is 120 - 300 °C, and the heating duration is 1 - 4 seconds. Among them, the pressure applied to the bag paper during heating is 10 - 24 kg / dm 2 。

[0054] To achieve the bonding of the transparent paper 13 and the bag paper 10 through the hot melt adhesive 12, the bonding part of the transparent paper 13 and the bag paper 10 can be heated. Specifically, the heating temperature is 120 - 300 °C, and the heating duration is 1 - 4 seconds. After heating, the hot melt adhesive 12 can diffuse into the transparent paper 13 and the bag paper 10 to achieve tight bonding of the transparent paper 13 and the bag paper 10. Further, 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 while heating, and the applied pressure is 10 - 24 kg / dm 2 。

[0055] S140. Add a strip-shaped sealing strip inside the continuously conveyed double-layer bag paper.

[0056] Add a strip-shaped sealing strip 20 inside the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is formed by covering another bag paper 10 on the upper layer of the bag paper 10 that fits the transparent paper 13 or folding the bag paper 10 that fits the transparent paper 13 in half; the transparent paper 13 is sandwiched between the double-layer bag paper 10.

[0057] Among them, steps S110 to S130 can be used to separately process and manufacture a single-layer bag paper 10 or to process and manufacture a certain single-layer bag paper 10 in the double-layer bag paper 10. If a single-layer bag paper 10 is separately processed and manufactured, another bag paper 10 can be covered on the upper layer of the bag paper 10 that fits the transparent paper 13 to form a double-layer bag paper 10, or the bag paper 10 that fits the transparent paper 13 can be folded in half (such as Figure 4The shown 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 be to process and manufacture a single-layer bag paper 10 in the double-layer bag paper 10, that is, first fold the bag paper 10 or first overlap two bag papers 10 to form a double-layer bag paper 10, and then execute steps S110 to S130.

[0058] Add a long strip-shaped sealing strip 20 inside the continuously conveyed double-layer bag paper 10. Align the double-layer bag paper 10 and conduct continuous conveyance. Then there is a gap between the double-layer bag papers 10, and the long strip-shaped sealing strip 20 can be inserted into the gap between the double-layer bag papers 10, so that the double-layer bag paper 10 and the long strip-shaped sealing strip 20 are superposed and combined. The processing process of inserting the long strip-shaped sealing strip 20 between the double-layer bag papers 10 is as Figure 10 shown, and the structure of the double-layer bag paper 10 with the long strip-shaped sealing strip 20 completely inserted is as Figure 11 shown.

[0059] S150. Coat hot melt adhesive at the pasting positions and the sealing strip positions on the side of each packaging bag on the double-layer bag paper.

[0060] Coat hot melt adhesive 12 at the pasting positions and the sealing strip 20 positions on the side of each packaging bag on the double-layer bag paper 10. Coat hot melt adhesive 12 at the pasting positions on the side of each packaging bag on the double-layer bag paper 10, and also coat hot melt adhesive 12 at the sealing strip 20 position on the double-layer bag paper 10. For the case of overlapping two bag papers 10 to form a double-layer bag paper 10, in addition to coating hot melt adhesive 12 at the sealing strip 20 position, it is necessary to coat hot melt adhesive 12 at the pasting positions on both sides and the bottom pasting position of each packaging bag on the bag paper 10. Then the structure after coating the hot melt adhesive 12 is as Figure 12 shown. For the case of folding the bag paper 10 to form a double-layer bag paper 10, in addition to coating hot melt adhesive 12 at the sealing strip 20 position, it is only necessary to coat hot melt adhesive 12 at the pasting positions on both sides of each packaging bag on the bag paper 10. Then the structure after coating the hot melt adhesive 12 is as Figure 13 shown. The sealing strip 20 has a certain distance from the edge of the upper bag paper 10, and 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.

[0061] S160. Heat the double-layer bag paper to seal the side and the sealing strip position of the packaging bag.

[0062] Heat the double-layer bag paper 10 to seal the side and the sealing strip 20 position of the packaging bag, and a sealing edge 14 can be formed after sealing.

[0063] Further, before cutting the sealed double-layer bag paper 10 to obtain a single display packaging bag, it further includes: opening a through hole 15 above the sealing strip 20 on the double-layer bag paper 10. The specific structure after opening the through hole 15 above the sealing strip 20 on the double-layer bag paper 10 is as shown in Figure 14 shown. The through hole 15 can be used to hang the packaging bag on a horizontally arranged support rod, facilitating the display and sale of the items in the packaging bag.

[0064] S170. Cut the sealed double-layer bag paper to obtain a single display packaging bag.

[0065] Cut the sealed double-layer bag paper 10 to obtain a single display packaging bag. The sealed double-layer bag paper 10 is cut by a cutter perpendicular to the conveying direction. The cutter perpendicular to the conveying direction is used to cut the connection between adjacent display packaging bags, so as to cut and separate adjacent display packaging bags and obtain a single display packaging bag. The single display packaging bag obtained after cutting is as shown in Figure 15 and Figure 18 shown. Among them, Figure 15 shows the case where two pieces of bag paper 10 are overlapped to form a double-layer bag paper 10, Figure 18 shows the case where the bag paper 10 is folded in half to form a double-layer bag paper 10.

[0066] Further, during the process of cutting the sealed double-layer bag paper 10, the top corners of the display packaging bag can also be cut into rounded corners simultaneously, obtaining a bag body structure as shown in Figure 17 shown. For the case where two pieces of bag paper 10 are overlapped to form a double-layer bag paper 10, the redundant part of the bottom bag body can also be cut, thereby obtaining a bag body structure as shown in Figure 16 shown.

[0067] Steps S110 to S170 are all realized by operating during the continuous conveying process of the bag paper 10, that is, it can realize the manufacture of display packaging bags during the continuous conveying process, greatly improving the production efficiency of the packaging bags.

[0068] In an embodiment of the present application, a display packaging bag is also disclosed. The display packaging bag is manufactured by the manufacturing method described in the above embodiment. Among them, the display packaging bag includes a first bag paper 101 and a second bag paper 102 that are oppositely arranged and overlapped, and a sealing strip 20 is arranged between the first bag paper 101 and the second bag paper 102; a display window 11 is opened on the first bag paper 101 and / or the second bag paper 102, and a transparent paper 13 is correspondingly attached to each display window 11, and the transparent paper 13 is clamped between the double-layer bag papers and is closely attached to the peripheral area of the display window 11; the sealing strip 20 includes a strip-shaped groove 21 arranged on the first bag paper 101 and a strip-shaped protrusion 22 arranged on the first bag paper 101; the strip-shaped groove 21 and the strip-shaped protrusion 22 are oppositely arranged and are both arranged at the opening of the display packaging bag; the non-opening sides of the display packaging bag are all provided with sealing edges 14, and the sealing edges 14 are obtained by bonding the side surface of the first bag paper 101 and the side surface of the second bag paper 102.

[0069] 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 oppositely arranged and overlapped, and a sealing strip 20 is arranged between the first bag paper 101 and the second bag paper 102; the sealing strip 20 includes a strip-shaped groove 21 arranged on the first bag paper 101 and a strip-shaped protrusion 22 arranged on the first bag paper 101; the strip-shaped groove 21 and the strip-shaped protrusion 22 are oppositely arranged and are both arranged at the opening of the display packaging bag; the non-opening sides of the display packaging bag are all provided with sealing edges 14, and the sealing edges 14 are obtained by bonding the side surface of the first bag paper 101 and the side surface of the second bag paper 102.

[0070] Specifically, the sealing strip 20 includes a strip-shaped groove 21 and a strip-shaped protrusion 22. To improve the bonding stability between the sealing strip 20 and the bag paper (the first bag paper 101 or the second bag paper 102), a relatively wide connecting film 23 can be arranged on the side of the sealing strip 20 close 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 and the bag paper are bonded and fixed through a hot melt adhesive 12, so as to realize the firm fixation of the sealing strip 20 and the bag paper. By arranging the connecting film 23, the bonding area between the sealing strip 20 and the hot air curtain on the bag paper can be increased, thereby improving the bonding stability between the sealing strip 20 and the bag paper.

[0071] To improve the tightness of the snap connection between the strip-shaped groove 21 and the strip-shaped protrusion 22, a snap is arranged on the side of the strip-shaped protrusion 22 facing the strip-shaped groove 21, and the outer opening width of the strip-shaped groove 21 is set to be smaller than the bottom width of the strip-shaped groove 21. The specific setting structure is as Figure 19As shown in the figure; the above structure can greatly improve the tightness of the snap connection between the strip-shaped groove 21 and the strip-shaped protrusion 22, that is, improve the sealing performance of the sealing strip 20 for sealing the bag mouth of the display packaging bag.

[0072] When a user uses the above packaging bag, the user can first tear off the sealing edge 14 above the sealing strip 20 (the sealing edge 14 formed by bonding the first bag body and the second bag body), and then use an external force to separate the strip-shaped groove 21 from the strip-shaped protrusion 22, so as to open the packaging bag and take out the items contained therein from the opening of the display packaging bag.

[0073] In an embodiment of the present invention, there is provided a display packaging bag and a manufacturing method thereof. The manufacturing method includes: opening at least one display window in a continuously conveyed bag paper, and coating hot melt adhesive on the peripheral area of the display window, the pasting position on the side of the packaging bag, and the sealing strip; pasting a transparent paper on the display window and heating it to make the transparent paper closely adhere to the bag paper; adding a long strip-shaped sealing strip inside the continuously conveyed double-layer bag paper; heating the double-layer bag paper to seal the side and the sealing strip of the packaging bag; cutting the sealed double-layer bag paper to obtain a single display packaging bag. The above manufacturing method of the display packaging bag can process the continuously conveyed bag paper to obtain a display window and paste a transparent paper, realizing the continuous production of the display packaging bag, thereby greatly improving the production efficiency and product quality of the display packaging bag.

[0074] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A display packaging bag, characterized in that, The display packaging bag includes a first bag paper and a second bag paper which are oppositely arranged and overlapped, and a sealing strip is arranged between the first bag paper and the second bag paper; A display window is formed on the first bag paper and / or the second bag paper, and a transparent paper is correspondingly attached to each display window. Each transparent paper is clamped between the double-layer bag papers and is closely attached to the peripheral area of the display window; The sealing strip includes 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 oppositely arranged and are both arranged at the opening of the display packaging bag; Sealing edges are provided on the non-opening sides of the display packaging bag, and the sealing edges are obtained by bonding the side surface of the first bag paper and the side surface of the second bag paper.

2. The display packaging bag according to claim 1, wherein, The transparent paper is a transparent fiber paper; the bag paper is a non-transparent fiber paper.

3. The display packaging bag according to claim 1 or 2, characterized in that, The display window is a long strip-shaped window that penetrates along the conveying direction, the width of the display window is 1.2 - 6 cm, and the transparent paper is a long strip-shaped transparent paper that penetrates along the conveying direction.

4. The display packaging bag according to claim 1 or 2, characterized in that, The display window is a window with a partially closed structure, and the display window is circular, oval, rectangular, polygonal or round-cornered rectangular.

5. The display packaging bag according to claim 4, wherein The transparent paper is a long strip-shaped transparent paper that penetrates along the conveying direction or a non-penetrating transparent paper that independently covers the display window.

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