Sealed packaging bag

Abstract

The utility model discloses a sealed packaging bag which solves the problems of high processing difficulty and the like. The front bag face is provided with a first sawtooth-shaped easy-to-tear line, the first easy-to-tear line forms a plurality of triangular areas which are linearly arranged, and films are pasted in the triangular areas. A first folding area and a second folding area which are adjacently arranged are formed between the bag opening and the first easy-to-tear line, the bag opening is folded for at least two times when the bag opening is closed, the front bag surface is folded forwards along the position between the first folding area and the second folding area during the first folding, the first folding area of the front bag surface is folded to be in contact with the second folding area of the front bag surface, and the second folding area of the front bag surface is folded to be in contact with the second folding area during the second folding. The first folding area of the rear bag surface is folded forwards along the position between the second folding area and the first easy-to-tear line, and is folded and adhered to the film. Through a double-layer folding mechanism, the packaging bag can form a tight multi-layer sealing structure when being closed, the sealing performance of the packaging bag is effectively improved, and leakage or damage of objects packaged in the packaging bag in the transportation process is prevented; and only one-plate forming is needed, so that the complexity in the production process is reduced.

Description

Technical Field

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

[0002] In today's society, packaging bags are an indispensable part of daily life, especially in the takeout and express delivery industries, where they are in huge demand and are used very frequently. Traditionally, the sealing method of packaging bags mainly relies on simple sealing stickers. Although this method is simple, it has limited anti-theft effect and cannot effectively ensure the safety and integrity of items during transportation.

[0003] The prior art discloses CN217674259U, a patent for a packaging bag, which has a fixing sheet on the front side of the bag body, the fixing sheet is fixedly connected to the bag body, and a plurality of connecting sheets are provided on the lower side of the fixing sheet, the connecting sheets are in a convex shape, and the upper side of the connecting sheet includes a necking sheet, the necking sheet is fixedly connected to the lower side of the fixing sheet, and the cover sheet is provided with a strong adhesive film on the side away from the bag body, the strong adhesive film is used to stick to the connecting sheet, and the strong adhesive film is covered with release paper. When placing the takeaway into the bag body, the merchant bends the cover sheet downward so that the cover sheet covers the bag mouth, and tears off the release paper of the strong adhesive film on the cover sheet so that the strong adhesive film sticks to the connecting sheet, because the connecting sheet is connected to the fixing sheet through the necking sheet thereon, and the fixing sheet is fixedly connected to the bag body. However, although this structural scheme improves the anti-theft performance of the packaging bag to a certain extent, there are still some problems that cannot be ignored. First, the addition of the necking piece requires additional cutting and installation, which not only increases the complexity of the production process, but also pushes up the manufacturing cost, which poses a challenge to large-scale production and cost control. Secondly, the sealing method of the packaging bag only relies on the simple covering of the cover sheet, which fails to achieve an ideal sealing effect, which may affect the protection of the contents during transportation, especially for items that need to be sealed, and its protective effect is particularly insufficient. Summary of the invention

[0004] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a sealed packaging bag to solve the problems of high processing difficulty and poor sealing.

[0005] The technical scheme of the utility model comprises: a front pocket surface, a back pocket surface, a pocket opening and a foldable side pocket surface, when the side pocket surface is folded, the front pocket surface and the back pocket surface contact and close the pocket opening; a serrated first easy-tear line is arranged on the front pocket surface, the first easy-tear line forms a plurality of linearly arranged triangular areas, and films are pasted in the triangular areas; a first folding area and a second folding area are formed between the pocket opening and the first easy-tear line, the first folding area is close to the pocket opening, and the second folding area is adjacent to the first easy-tear line; when closing the pocket opening, the pocket is folded at least twice, when folding for the first time, the pocket is folded forward along the position between the first folding area and the second folding area, the first folding area of ​​the front pocket surface is folded to contact the second folding area of ​​the front pocket surface, when folding for the second time, the pocket is folded forward along the position between the second folding area and the first easy-tear line, and the first folding area of ​​the back pocket surface is folded and pasted on the film.

[0006] By adopting the above technical scheme, through the double-layer folding mechanism, the packaging bag can form a tight multi-layer sealing structure when closed, which effectively improves the sealing of the packaging bag and prevents leakage or damage of the inner packaging items during transportation; a serrated first tear line and a film pasting design are adopted, once the packaging bag is opened, it will be torn at the first tear line, leaving obvious traces, which increases the difficulty of illegal opening and improves the anti-theft effect; in addition, compared with the prior art that requires the additional installation of a neck shrinking piece, the packaging bag design of the utility model is simpler, does not require complicated plate cutting and installation steps, and only requires one plate molding, which reduces the complexity of the production process, and also reduces the manufacturing cost, which is conducive to large-scale production and market promotion.

[0007] In one possible design, the film is positioned close to the bottom tip of the triangle.

[0008] With the above design, since the bottom tip of the triangular area is the easiest part to tear in the entire area, the film is arranged close to the bottom tip of the triangular area. The triangular area is easy to tear starting from the bottom tip and then gradually enlarges the tear, so that any attempt to illegally open the packaging bag will leave obvious traces, further increasing the difficulty of opening.

[0009] In a possible design, a serrated second tear line is provided on the rear pocket surface, the second tear line is located on the first folding area, and the shape and size of the second tear line are consistent with those of the first tear line.

[0010] With the above design, when the patch is pasted, the second tear line and the first tear line correspond to each other in shape and position. Together with the first tear line and the film, the second tear line will also become a weak point for tearing, thereby forming a multi-level anti-theft barrier and effectively preventing unauthorized opening.

[0011] In a possible design, the first folding area of ​​the front pocket surface is provided with a height piece, the height of the height piece is consistent with the height of the first folding area, and the height piece is integrally formed with the front pocket surface.

[0012] With the above design, the height sheet provides a clear folding reference point, which means that when folding, the height of the height sheet is referenced for folding, so that the first tear line and the second tear line can basically correspond accurately, thereby improving the folding accuracy and helping to enhance the anti-theft effect.

[0013] In a possible design, pre-pressed crease lines are respectively provided between the first folding area and the second folding area, and between the second folding area and the first easy tear line.

[0014] With the above design, the pre-pressed crease lines provide a clear folding guide for the user, so that when closing the packaging bag, the user can accurately fold along these crease lines, avoiding the problem of poor sealing caused by random folding, and ensuring the corresponding degree of folding in each area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model before folding;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model after being folded for the first time;

[0017] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A;

[0018] Among them, 1. front pocket surface; 2. back pocket surface; 3. side pocket surface; 4. pocket opening; 11. first tear line; 12. triangle area; 13. film; 51. first folding area; 52. second folding area; 53. crease line; 21. second tear line; 14. height piece. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 3A sealed packaging bag shown in the figure comprises a front bag surface 1, a rear bag surface 2, a bag opening 4 and a foldable side bag surface 3. The front bag surface 1, the rear bag surface 2 and the top of the side bag surface 3 are enclosed to form the bag opening 4. When the top of the side bag surface 3 is folded, the front bag surface 1 and the rear bag surface 2 are in contact to close the bag opening 4. A serrated first tear line 11 is provided on the front bag surface 1. The first tear line 11 forms ten to twenty straight-lined triangular areas 12. A film 13 is pasted in each triangular area 12. The film 13 is covered with adhesive tape when not in use. A first folding area 51 and a second folding area 52 are formed between the bag opening 4 and the first tear line 11. The first folding area 51 is close to the bag opening 4, and the second folding area 52 is adjacent to the first tear line 11. The first folding area 51 is annular and is formed by part of the front bag surface 1, the rear bag surface 2 and the side bag surface 3. Similarly, the second folding area 52 is also the same. Pre-stressed crease lines 53 are respectively arranged between the first folding area 51 and the second folding area 52, and between the second folding area 52 and the first tear line 11. Before closing the bag opening 4, the side bag surface 3 is folded first, and folded at least twice when closing the bag opening 4. During the first folding, the fold line 53 between the first folding area 51 and the second folding area 52 is folded forward, and the first folding area 51 of the front bag surface 1 is folded to contact the second folding area 52 of the front bag surface 1. Of course, the first folding area 51 of the back bag surface 2 will be folded accordingly; during the second folding, the fold line 53 between the second folding area 52 and the first tear line 11 is folded forward, and the first folding area 51 of the back bag surface 2 is folded and pasted on the film 13, so that the first folding area 51 is folded to the inside of the second folding area 52. From the perspective of sealing, after folding and pasting, two sealing areas are formed at the positions of the two folding lines 53 to reduce the occurrence of leakage. From the perspective of anti-theft and anti-abnormal opening packaging, the first tear line 11 is serrated, and the film 13 is pasted on the first folding area 51 of the rear bag surface 2. Once the packaging bag is opened, it will be torn at the first tear line 11, leaving obvious traces, which increases the difficulty of illegal opening and improves the anti-theft effect. In addition, from the processing perspective, the packaging bag does not require complicated plate cutting and installation steps, only one plate is needed for forming, and the processing and forming is convenient and fast.

[0020] The film 13 is arranged near the bottom tip of the triangular area 12. When the packaging bag is opened, the film 13 will tear the first tear line 11 from the bottom tip of the triangular area 12, and the tear will gradually expand. Therefore, as long as the film 13 is applied to the bottom tip of the triangular area 12, the first tear line 11 can be torn when opening.

[0021] A serrated second tear line 21 is provided on the back pocket surface 2. The second tear line 21 is located on the first folding area 51. The shape and size of the second tear line 21 are consistent with the first tear line 11. When the patch is pasted, the second tear line 21 corresponds to the first tear line 11 in shape and position. With the first tear line 11 and the film 13, the second tear line 21 will also become a weak point for tearing. Even if the first tear line 11 is not torn, the second tear line 21 will be torn, ensuring the anti-theft effect.

[0022] The first folding area 51 of the front pocket surface 1 is provided with a height piece 14, the height of the height piece 14 is consistent with the height of the first folding area 51, and the height piece 14 is formed integrally with the front pocket surface 1. In fact, the height of the height piece 14 is substantially the same as the first folding area 51 and the second folding area 52, and the height piece 14 can be used as a folding ruler, and the first easy tear line 11 and the second easy tear line 21 can be accurately and substantially corresponded to each other by referring to the height of the height piece 14 when folding.

Claims

1. A sealed packaging bag, comprising a front bag surface (1), a rear bag surface (2), a bag opening (4), and a foldable side bag surface (3), wherein when the side bag surface (3) is folded, the front bag surface (1) and the rear bag surface (2) contact to close the bag opening (4); characterized in that: The front pocket surface (1) is provided with a serrated first tear line (11), the first tear line (11) forming a plurality of linearly arranged triangular areas (12), and a film (13) is pasted in the triangular areas (12); a first folding area (51) and a second folding area (52) are formed between the pocket opening (4) and the first tear line (11), the first folding area (51) being close to the pocket opening (4), and the second folding area (52) being adjacent to the first tear line (11); when closing the pocket opening (4), the pocket is folded at least twice, and during the first folding, the pocket is folded forward along a position between the first folding area (51) and the second folding area (52), the first folding area (51) of the front pocket surface (1) is folded forward to contact the second folding area (52) of the front pocket surface (1), and during the second folding, the pocket is folded forward along a position between the second folding area (52) and the first tear line (11), and the first folding area (51) of the rear pocket surface (2) is folded and pasted on the film (13).

2. The sealed packaging bag according to claim 1, characterized in that: The film (13) is arranged close to the bottom tip of the triangular area (12).

3. The sealed packaging bag according to claim 1 or 2, characterized in that: A serrated second tear line (21) is provided on the rear pocket surface (2); the second tear line (21) is located on the first folding area (51); the shape and size of the second tear line (21) are consistent with those of the first tear line (11).

4. The sealed packaging bag according to claim 3, characterized in that: The first folding area (51) of the front pocket surface (1) is provided with a height piece (14), the height of the height piece (14) is consistent with the height of the first folding area (51), and the height piece (14) and the front pocket surface (1) are integrally formed.

5. The sealed packaging bag according to claim 1 or 2, characterized in that: Pre-pressed crease lines (53) are respectively arranged between the first folding area (51) and the second folding area (52), and between the second folding area (52) and the first easy tear line (11).

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