Display package and method of manufacturing the same

Abstract

The application discloses a display packaging bag and a manufacturing method thereof. The manufacturing method comprises the following steps: opening at least one display window on continuously conveyed bag paper, and coating heat-seal glue on the peripheral area of the display window, the sticking place of the side of the packaging bag and the sealing strip; pasting transparent paper on the display window and heating to tightly adhere the transparent paper to the bag paper; adding an elongated sealing strip on the inner side 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. The manufacturing method of the display packaging bag can process the continuously conveyed bag paper to obtain the display window and paste the transparent paper, realizes continuous production of the display packaging bag, and greatly improves the production efficiency and product quality of the display packaging bag.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging bags, in particular to a display packaging bag and a manufacturing method thereof. BACKGROUND

[0002] In order to improve the packaging quality, the packaging bag is usually made of non-transparent material, but the consumer wants to see the real object in the packaging bag before purchasing. In order to solve this problem, a display window can be opened on the packaging bag. In order to produce the packaging bag with the display window, the bag body of the packaging bag needs to be cut and the display window needs to be opened, and then a transparent film is used to close the display window to obtain a complete packaging bag. However, in the prior art method, a single packaging bag with a display function is usually independently produced. Since the manufacturing process of this type of packaging bag is relatively complex, a long time is needed to produce a single packaging bag, and therefore the efficiency of independent production of the packaging bag is low. Therefore, the prior art method has the problem of low efficiency in producing the display packaging bag. SUMMARY

[0003] The embodiments of the present application provide a display packaging bag and a manufacturing method thereof, and aim to solve the problem of low efficiency in producing the display packaging bag in the prior art method.

[0004] In a first aspect, the embodiments of the present application provide a manufacturing method of a display packaging bag, and the method comprises the following steps:

[0005] At least one display window is opened on the continuously conveyed bag paper; the display window is through or locally closed along the conveying direction;

[0006] Hot melt adhesive is coated on the peripheral area of the display window on the bag paper;

[0007] The transparent paper is pasted on the display window and heated to tightly adhere the transparent paper to the bag paper;

[0008] A long strip-shaped sealing strip is added to the inner side of the continuously conveyed double-layer bag paper; the double-layer bag paper is another bag paper overlaid on the bag paper with the transparent paper or the bag paper with the transparent paper is folded; the transparent paper is clamped between the double-layer bag paper;

[0009] Hot melt adhesive is coated on the pasting position and the sealing strip position of each packaging bag side of the double-layer bag paper;

[0010] The double-layer bag paper is heated to seal the side of the packaging bag and the sealing strip position;

[0011] The double-layer bag paper after sealing is cut to obtain a single display packaging bag.

[0012] In a second aspect, the present application also provides a display packaging bag manufactured by the manufacturing method of the first aspect, wherein the display packaging bag comprises a first bag paper and a second bag paper oppositely arranged and overlapped, and a sealing strip arranged between the first bag paper and the second bag paper.

[0013] The first bag paper and / or the second bag paper is provided with a display window, and a transparent paper is arranged on each display window.

[0014] 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, and the strip-shaped groove and the strip-shaped protrusion are oppositely arranged and arranged at the opening of the display packaging bag.

[0015] The display packaging bag is provided with an edge sealing on the non-opening side, and the edge sealing is obtained by bonding the side of the first bag paper and the side of the second bag paper.

[0016] The display packaging bag and the manufacturing method thereof are provided, and the manufacturing method comprises the following steps: opening at least one display window on the continuously conveyed bag paper, and coating a heat-seal adhesive on the peripheral area of the display window, the bonding position of the side of the packaging bag and the sealing strip; pasting a transparent paper on the display window and heating to tightly bond the transparent paper and the bag paper; adding a long strip-shaped sealing strip on the inner side 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. The manufacturing method of the display packaging bag can process the continuously conveyed bag paper to obtain the display window and paste the transparent paper, realizes the continuous production of the display packaging bag, and greatly improves the production efficiency and product quality of the display packaging bag. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The method flow chart of the manufacturing method of the display packaging bag provided by the embodiments of the present application is provided.

[0019] Figure 2 The manufacturing state diagram of the display packaging bag provided by the embodiments of the present application is provided.

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

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

[0022] Figure 5 A manufacturing process diagram of the display packaging bag provided by the embodiment of the present application;

[0023] Figure 6 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present application;

[0024] Figure 7 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present application;

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

[0026] Figure 9 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present application;

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

[0028] Figure 11 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present application;

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

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

[0031] Figure 14 Another manufacturing state diagram of the display packaging bag provided by the embodiment of the present application;

[0032] Figure 15 A structure diagram of the display packaging bag provided by the embodiment of the present application;

[0033] Figure 16 Another structure diagram of the display packaging bag provided by the embodiment of the present application;

[0034] Figure 17 Another structure diagram of the display packaging bag provided by the embodiment of the present application;

[0035] Figure 18 Another structure diagram of the display packaging bag provided by the embodiment of the present application;

[0036] Figure 19 A cross-sectional structure diagram of the display packaging bag is provided for the embodiments of the present application.

[0037] Reference signs: 10, bag paper; 101, first bag paper; 102, second bag paper; 11, display window; 12, heat-sealing glue; 13, transparent paper; 14, edge sealing; 15, through hole; 20, sealing strip; 21, strip-shaped groove; 22, strip-shaped protrusion; 23, connecting film. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0039] It should be understood that, when used in the specification and the appended claims, the terms “comprise” and “include” indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

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

[0041] It should be further understood that the term “and / or” used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0042] In the present embodiment, please refer to Figure 1 As shown in the figure, the present embodiment provides a manufacturing method of a display packaging bag, wherein the method comprises steps S110-S170.

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

[0044] The bag paper 10 is continuously conveyed by a mechanical device, for example, rollers can be arranged on both sides of the bag paper 10, and the bag paper 10 is horizontally continuously conveyed by rotating the rollers, as shown in the figure; at least one display window 11 is opened on the continuously conveyed bag paper 10, and the display window 11 is through or partially closed along the conveying direction. Figure 2 S120, a transparent paper is arranged on the display window of the bag paper.

[0045] Specifically, the display window 11 opened on the single-layer bag paper 10 can be Figure 3 Or Figure 4 As shown, the display window 11 is through in the conveying direction. The specific manufacturing process of opening the display window 11 is as shown Figure 5 As 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, thereby obtaining the display window 11 through in the conveying direction. The display window 11 opened on the single-layer bag paper 10 can also be as shown Figure 7 As shown, the display window 11 forms a partially closed structure.

[0046] The bag paper 10 can be continuously conveyed and opened with the display window 11, or it can be continuously conveyed and opened with the display window 11. One of the single-layer bag papers 10 of the double-layer bag paper 10 is cut and forms a display window 11 with a partially closed structure. Please refer to the patent "Bag cutting device and bag manufacturing method" applied by the applicant before, with the patent application number "202410392756.9". One of the single-layer bag papers 10 of the double-layer bag paper 10 is cut and forms a display window 11 through in the conveying direction. Please refer to the patent "Dustproof bag production device for continuous production" applied by the applicant before, with the patent application number "202311521727.X" (in this patent, single cutting knife cutting, setting two cutting knives arranged in parallel can achieve it).

[0047] S120, coating heat seal adhesive on the periphery of the display window on the bag paper.

[0048] Coating heat seal adhesive 12 on the periphery of the display window 11 on the bag paper 10, the structure of the side of the bag paper 10 coated with heat seal adhesive 12 is as shown Figure 6 And Figure 7 As shown Figure 6 Corresponding to the display window 11 through in the conveying direction opened on the bag paper 10, Figure 7 Corresponding to the display window 11 with a partially closed structure opened on the bag paper 10. Coating heat seal adhesive 12 on the periphery of the display window 11, for single-layer bag paper 10, heat seal adhesive 12 can be coated directly, for double-layer bag paper 10, heat seal adhesive 12 needs to be coated on the side of the bag paper 10 facing the other bag paper 10. Heat seal adhesive 12 is quickly spread and adhered and sealed to the bag paper 10 after being heated. In a more specific embodiment, the heat seal adhesive 12 is water-soluble heat seal adhesive 12. Water-soluble heat seal adhesive 12 can be used to increase the effect of adhering the bag paper 10, thereby increasing the sealing performance of the bag paper 10 after being adhered.

[0049] S130, the transparent paper is pasted on the display window, and heated to tightly adhere the transparent paper to the bag paper.

[0050] The transparent paper 13 is pasted on the display window 11, and the structure after the transparent paper 13 is pasted on the display window 11 is as shown in Figure 8 The transparent paper 13 is pasted on the display window 11, and the structure after the transparent paper 13 is pasted on the display window 11 is as shown in Figure 9 Further, the transparent paper 13 can be pasted in the display window 11, and for the double-layer bag paper 10, the transparent paper 13 is located between the double-layer bag paper 10. Specifically, the transparent paper 13 is transparent fiber paper, and the bag paper 10 is non-transparent fiber paper. The transparent paper 13 can be set as transparent fiber paper, and the bag paper 10 can be set as non-transparent fiber paper. The transparent fiber paper part can be translucent and display the product 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 penetrating in 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 penetrating in the conveying direction. The width of the long strip-shaped display window 11 penetrating in the conveying direction can be set to 1.2-6 cm, and at this time, the transparent paper 13 needs to be set as a long strip-shaped transparent paper 13 penetrating in the conveying direction, and 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 closed structure, and the display window 11 is circular, elliptical, rectangular, polygonal or round rectangular. Among them, the transparent paper 13 is a long strip-shaped transparent paper 13 penetrating in the conveying direction or a non-penetrating transparent paper 13 independently covering the display window 11. For the case that the display window 11 is a window with a partially closed structure, the transparent paper 13 can be set as a long strip-shaped transparent paper 13 penetrating in the conveying direction, and the long strip-shaped transparent paper 13 can penetrate and cover part of the display window 11. Alternatively, the transparent paper 13 can be set as a non-penetrating transparent paper 13 independently covering the display window 11, and the non-penetrating transparent paper 13 independently covers one display window 11. 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℃, and the heating time is 1-4 seconds. During the heating process, the pressure applied to the bag paper is 10-24 kg / dm 2 .

[0054] In order to realize the lamination of the transparent paper 13 and the bag paper 10 by the heat-seal adhesive 12, the lamination position of the transparent paper 13 and the bag paper 10 can be heated, and the specific heating temperature is 120-300°C, and the heating time is 1-4 seconds. After heating, the heat-seal adhesive 12 can diffuse into the transparent paper 13 and the bag paper 10, so as to realize the close bonding of the transparent paper 13 and the bag paper 10. Further, in order to improve the bonding effect of the transparent paper 13 and the bag paper 10, the transparent paper 13 and the bag paper 10 can be pressed at the same time. The pressure applied is 10-24 kg / dm 2 .

[0055] S140, increasing a long strip-shaped sealing strip in the inner side of the continuously conveyed double-layer bag paper.

[0056] A long strip-shaped sealing strip 20 is added to the inner side of the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is formed by covering another bag paper 10 on the bag paper 10 to which the transparent paper 13 is laminated or folding the bag paper 10 to which the transparent paper 13 is laminated. The transparent paper 13 is clamped between the double-layer bag paper 10.

[0057] In the step S110 to the step S130, a single-layer bag paper 10 can be processed and manufactured alone, or a single-layer bag paper 10 in the double-layer bag paper 10 can be processed and manufactured. If the single-layer bag paper 10 is processed and manufactured alone, another bag paper 10 can be covered on the bag paper 10 to which the transparent paper 13 is laminated to form a double-layer bag paper 10, or the bag paper 10 to which the transparent paper 13 is laminated can be folded (for example, the bag paper 10 shown in FIG. 1 is folded along the transverse center line to form a double-layer bag paper 10). Figure 4 The step S110 to the step S130 can also be to process and manufacture a single-layer bag paper 10 in the double-layer bag paper 10, that is, the bag paper 10 is folded or two bag papers 10 are overlapped to form a double-layer bag paper 10 first, and then the step S110 to the step S130 is performed.

[0058] The long strip-shaped sealing strip 20 is added to the inner side of the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is aligned and continuously conveyed, and has a gap between the double-layer bag paper 10. The long strip-shaped sealing strip 20 can be inserted into the gap between the double-layer bag paper 10, so that the double-layer bag paper 10 and the long strip-shaped sealing strip 20 are combined. The process of inserting the long strip-shaped sealing strip 20 into the gap between the double-layer bag paper 10 is shown in FIG. 2, and the structure of the double-layer bag paper 10 into which the long strip-shaped sealing strip 20 is completely inserted is shown in FIG. 3. Figure 10 The long strip-shaped sealing strip 20 is added to the inner side of the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is aligned and continuously conveyed, and has a gap between the double-layer bag paper 10. The long strip-shaped sealing strip 20 can be inserted into the gap between the double-layer bag paper 10, so that the double-layer bag paper 10 and the long strip-shaped sealing strip 20 are combined. The process of inserting the long strip-shaped sealing strip 20 into the gap between the double-layer bag paper 10 is shown in FIG. 2, and the structure of the double-layer bag paper 10 into which the long strip-shaped sealing strip 20 is completely inserted is shown in FIG. 3. Figure 11 The long strip-shaped sealing strip 20 is added to the inner side of the continuously conveyed double-layer bag paper 10. The double-layer bag paper 10 is aligned and continuously conveyed, and has a gap between the double-layer bag paper 10. The long strip-shaped sealing strip 20 can be inserted into the gap between the double-layer bag paper 10, so that the double-layer bag paper 10 and the long strip-shaped sealing strip 20 are combined. The process of inserting the long strip-shaped sealing strip 20 into the gap between the double-layer bag paper 10 is shown in FIG. 2, and the structure of the double-layer bag paper 10 into which the long strip-shaped sealing strip 20 is completely inserted is shown in FIG. 3.

[0059] S150, coating the heat-seal adhesive on the double-layer bag paper at the pasting position and the sealing strip on each side of the packaging bag.

[0060] The heat seal adhesive 12 is coated on the double-layered bag paper 10 at the adhesive position of each packaging bag side and the sealing strip 20. The heat seal adhesive 12 is coated on the double-layered bag paper 10 at the adhesive position of each packaging bag side, and the heat seal adhesive 12 is also coated on the double-layered bag paper 10 at the sealing strip 20. For the case of overlapping two pieces of bag paper 10 to form the double-layered bag paper 10, in addition to coating the heat seal adhesive 12 at the sealing strip 20, the heat seal adhesive 12 needs to be coated on the bag paper 10 at the adhesive position of each packaging bag side and the bottom adhesive position, and the structure after coating the heat seal adhesive 12 is as shown in FIG. 2. Figure 12 For the case of folding the bag paper 10 to form the double-layered bag paper 10, in addition to coating the heat seal adhesive 12 at the sealing strip 20, the heat seal adhesive 12 needs to be coated on the bag paper 10 at the adhesive position of each packaging bag side, and the structure after coating the heat seal adhesive 12 is as shown in FIG. 3. Figure 13 The sealing strip 20 is spaced apart from the edge of the upper bag paper 10 by a certain distance, 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, heating the double-layered bag paper to seal the side of the packaging bag and the sealing strip.

[0062] The double-layered bag paper 10 is heated to seal the side of the packaging bag and the sealing strip 20, and the sealing forms the sealing edge 14.

[0063] Further, before the double-layered bag paper 10 after being sealed is cut to obtain a single display packaging bag, it further includes: a through hole 15 is formed on the double-layered bag paper 10 above the sealing strip 20. The specific structure after the through hole 15 is formed on the double-layered bag paper 10 above the sealing strip 20 is as shown in FIG. 4. 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 goods in the packaging bag.

[0064] S170, cutting the double-layered bag paper after being sealed to obtain a single display packaging bag.

[0065] The double-layered bag paper 10 after being sealed is cut to obtain a single display packaging bag. The double-layered bag paper 10 after being sealed is cut by a cutter perpendicular to the conveying direction, and the cutter perpendicular to the conveying direction is used to cut the connection between adjacent display packaging bags, so as to cut and separate the adjacent display packaging bags and obtain a single display packaging bag. The single display packaging bag obtained after cutting is as shown in FIG. 5 and FIG. 6. Figure 15 Figure 18 As shown in FIG. 5 and FIG. 6, Figure 15 for the case of overlapping two pieces of bag paper 10 to form the double-layered bag paper 10, Figure 18 for the case of folding the bag paper 10 to form the double-layered bag paper 10. ​

[0066] Further, in the process of cutting the sealed double-layered bag paper 10, the top corners of the display packaging bag can also be simultaneously rounded to obtain a bag structure as shown in Figure 17 . For the case of overlapping two bag papers 10 to form a double-layered bag paper 10, the excess part of the bag body at the bottom can also be cut to obtain a bag structure as shown in Figure 16 .

[0067] Steps S110 to S170 are all implemented in the process of continuously conveying the bag paper 10, that is, the display packaging bag can be manufactured in the continuous conveying process, greatly improving the production efficiency of the packaging bag.

[0068] The application further discloses a display packaging bag manufactured by the manufacturing method.

[0069] Please refer to Figure 19 . As shown in the figure, the display packaging bag comprises a first bag paper 101 and a second bag paper 102 which 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 comprises 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 side of the display packaging bag is provided with an edge 14, and the edge 14 is obtained by bonding the side of the first bag paper 101 and the side of the second bag paper 102.

[0070] Specifically, the sealing strip 20 includes a strip-shaped groove 21 and a strip-shaped protrusion 22. In order to improve the stability of the sealing strip 20 and the bag paper (the first bag paper 101 or the second bag paper 102) in adhesion, a wider 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, and the connecting film 23 and the bag paper are adhered and fixed by the heat-sealing adhesive 12, so as to realize the stable fixation of the sealing strip 20 and the bag paper. By arranging the connecting film 23, the area of the sealing strip 20 and the hot air curtain on the bag paper in adhesion and fixation can be increased, so as to improve the stability of the sealing strip 20 and the bag paper in adhesion.

[0071] In order to improve the tightness of the strip-shaped groove 21 and the strip-shaped protrusion 22 in clamping connection, a buckle 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 less than the bottom width of the strip-shaped groove 21, and the specific arrangement structure is as shown in Figure 19 The above structure can greatly improve the tightness of the strip-shaped groove 21 and the strip-shaped protrusion 22 in clamping connection, that is, the sealing performance of the sealing strip 20 in sealing the bag opening of the display packaging bag.

[0072] When a user uses the above packaging bag, the sealing edge 14 (formed by the adhesion of the first bag body and the second bag body) above the sealing strip 20 can be torn off first, and then external force is used to make the strip-shaped groove 21 and the strip-shaped protrusion 22 out of contact, so as to open the packaging bag and take out the articles contained therein from the opening of the display packaging bag.

[0073] The display packaging bag and the manufacturing method thereof provided in the embodiment of the present application, the manufacturing method comprises the following steps: opening at least one display window on the continuously conveyed bag paper, and coating heat-sealing adhesive on the peripheral area of the display window, the pasting place of the side of the packaging bag, and the sealing strip; pasting transparent paper on the display window and heating to make the transparent paper closely adhere to the bag paper; increasing a long strip-shaped sealing strip on the inner side 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. The manufacturing method of the display packaging bag can process the continuously conveyed bag paper to obtain a display window and paste transparent paper, realizes the continuous production of the display packaging bag, and greatly improves the production efficiency and product quality of the display packaging bag.

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

Claims

1. A method for manufacturing a display packaging bag, characterized in that, The manufacturing method includes: At least one display window is provided on the continuously conveyed paper bag; the display window extends through the conveying direction; Heat-sealing adhesive is applied to the periphery of the display window on the bag paper; heat-sealing adhesive is applied to the side of the bag paper with the display window facing the other side in the double-layer bag paper; Transparent paper is applied to the display window and heated to ensure it adheres tightly to the bag paper; the transparent paper is a long strip of transparent paper that runs through the conveying direction. The display window is a long strip-shaped window that runs through the conveying direction; 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; 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. Heating the double-layered paper bag seals the sides and sealing strip of the packaging bag. The sealed double-layered paper bag is cut to obtain individual display packaging bags.

2. The method for manufacturing a display packaging bag according to claim 1, characterized in that, The heat sealant is a water-soluble heat sealant.

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

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

5. The method for manufacturing a display packaging bag according to any one of claims 1-4, characterized in that, Before cutting the sealed double-layered paper bag to obtain a single display packaging bag, the process also includes: A through hole is made on the double-layered bag paper above the sealing strip.

6. A display packaging bag, said display packaging bag being manufactured by the manufacturing method according to any one of claims 1-5, characterized in that, The display packaging bag includes a first bag of paper and a second bag of paper that are arranged opposite to and overlap each other, and a sealing strip is disposed between the first bag of paper and the second bag of paper; 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. 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; 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.

7. The display packaging bag according to claim 6, characterized in that, The transparent paper is transparent fiber paper; the bag paper is non-transparent fiber paper.

8. The display packaging bag according to claim 6 or 7, characterized in that, The width of the display window is 1.2-6cm.

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