PE film packaging bag with double-layer sealing structure

Abstract

The invention relates to the technical field of packaging bags, in particular to a PE (polyethylene) film packaging bag with a double-layer sealing structure, which comprises an HDPE (high-density polyethylene) bag and a lifting belt arranged on the surface of the HDPE bag, and further comprises anti-tamper joint strips, an LDPE (low-density polyethylene) film, a rocking wing and a bonding end, the two anti-tamper joint strips are mounted on two side end surfaces of the HDPE bag, and the LDPE film is arranged in an opening end of the HDPE bag. According to the packaging box, the LDPE film and the HDPE bag are combined for use, efficient sealing and fixing of the packaging box are achieved, the LDPE film can be tightly attached to the joint position of the packaging box, shaking and leakage of food in the transportation process are effectively prevented, and meanwhile the freshness and taste of the food are kept; by means of ingenious combination of the lifting belts, the rocking wings, the anti-tamper joint strips and the like, convenience and safety of packaging are achieved, the lifting belts which are turned in a crossed mode can effectively prevent a packaging bag from sliding down in the lifting process, the width of the rocking wings is larger than one half of that of an HDPE bag, and the rocking wings can completely cover the opening end of the packaging bag.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bags, in particular to a PE film packaging bag with a double-layer sealing structure. Background Art

[0002] PE film packaging bags are plastic packaging bags made of polyethylene (PE) as the main material. They are non-toxic and tasteless, highly transparent, moisture-proof and dust-proof, and easy to process and shape. They are widely used in food, daily necessities, electronics, agriculture and other fields to package, protect and display various items. At the same time, attention should be paid to environmentally friendly recycling to reduce pollution to the environment. PE film is divided into LDPE film and HDPE film, each of which has its own unique application scenarios in the field of food packaging. LDPE film is soft and easy to process into various shapes. It can fit tightly to the corners and gaps of the packaging box to achieve a good sealing effect. This sealing performance effectively prevents liquid or semi-fluid food (such as sauces, soups, etc.) from leaking during transportation, maintaining the integrity and hygiene of the food; HDPE film has high tensile strength and toughness, can withstand large weight and pressure, and is not easy to break. It is an ideal material for making packaging boxes and bags, making take-out food safe and stable during transportation.

[0003] After the takeaway box is packed with food, start from one end of the plastic wrap and wrap it around the four sides of the takeaway box several times to make the plastic wrap fit tightly against the seam between the lid and the box body. Then put the takeaway box wrapped with plastic wrap into the packaging bag, fold the opening of the bag or tie a knot, start from one end of the sealing sticker and stick it along the opening of the bag, and press the sealing sticker with your fingers to ensure that it is firmly stuck to the bag.

[0004] However, the wrapping film relies on its own adsorption force to fit the seam between the lid and the box body of the takeout box. During transportation, due to factors such as bumps and squeezing, the adsorption force will weaken, causing the wrapping film to loosen, which is very likely to cause food leakage in the packaging box, and multiple wrappings waste materials. This packaging method requires merchants to perform multiple steps, including wrapping plastic wrap, putting it in a bag, folding or tying a knot, and sticking sealing stickers, which is time-consuming and labor-intensive. Japanese cuisine such as sushi and sashimi has high requirements for freshness, shape, and placement. After wrapping the plastic wrap, it needs to be placed in a packaging paper box or packaging bag with matching inner dimensions. Otherwise, it is easy to move, squeeze or deform due to excessive storage space, causing the rice and ingredients of the sushi to separate during the takeout delivery process. The bagging method of this type of food is even more time-consuming. In addition, the packaging of sushi requires stable support and clear separation space. Square packaging boxes are usually used to facilitate plating. However, the corners of square packaging boxes are relatively clear, and the contact area with the stretch film is not as uniform as that of round or oval lunch boxes, which can easily cause the stretch film to not fit tightly at the corners and is more likely to become loose.

[0005] Therefore, a PE film packaging bag with a double-layer sealing structure is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a PE film packaging bag with a double-layer sealing structure, which is initially sealed by stretching the LDPE film to close the seam, then folding the flaps and cross-fixing them with a pull belt, and finally tearing the adhesive strip covering film to bond the LDPE film and the inner surface of the HDPE bag to complete the secondary sealing, so as to solve the packaging problems of loose wrapping film, time-consuming and labor-consuming packaging methods, and unsuitability for special food packaging.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A PE film packaging bag with a double-layer sealing structure comprises a HDPE bag and a lifting strap arranged on the surface of the HDPE bag, and also comprises an anti-tampering sticker, an LDPE film, a rocker and an adhesive end. Two of the anti-tampering stickers are installed on both side end surfaces of the HDPE bag, the LDPE film is arranged inside the open end of the HDPE bag, two of the rockers are installed on both sides of the open end of the HDPE bag, and the lifting strap is arranged on the outer side surface of the rocker. The inverted HDPE bag drives the LDPE film to be located at the upper end of a packaging box, the stretched and deformed LDPE film is attached to the side end surface of the packaging box, the HDPE bag covers the outer end of the packaging box, the LDPE film is attached to the HDPE bag, and two rockers folded inward continuously cover the open end of the HDPE bag and wrap the bottom of the packaging box. The two lifting straps are crossed and flipped and then meet on the opposite side of the opening position.

[0009] From the above scheme, it can be seen that the double-layer design of HDPE bag and LDPE film significantly enhances the sealing and preservation effect of the package. The setting of the anti-tampering strip effectively prevents the packaging bag from being illegally opened, ensuring the safety of the items in the package. At the same time, the clever combination of the swing wing and the pull strap is not only convenient for users to carry and pull, but also realizes the comprehensive wrapping of the bottom of the packaging box, further improving the stability of the packaging. In addition, the packaging bag has a simple structure and convenient operation, which greatly improves the packaging efficiency and user experience, and has broad application prospects and market value.

[0010] Preferably, both ends of the lifting strap are provided with bonding ends, and the lifting strap is connected to the outer surface of the rocker wing through the bonding ends. The bonding ends are located at the side ends of the rocker wing, and the distance between the two bonding ends on one side is greater than the distance between the two bonding ends on the other side.

[0011] It can be seen from the above scheme that by designing the adhesive ends with different spacings on the lifting strap, a flexible connection between the lifting strap and the swing wing is achieved. This design not only enhances the firmness of the packaging bag, but also makes the lifting strap more stable during use and not easy to fall off. At the same time, the adhesive ends with different spacings provide users with more choices and operating space, making it easy to adjust the position and length of the lifting strap according to actual needs, thereby improving the practicality and convenience of the packaging bag. In addition, the design also simplifies the production process of the packaging bag, reduces costs, and has significant economic benefits.

[0012] Preferably, an open groove is provided at the center of the LDPE film, and the open groove is an elliptical smooth structure.

[0013] From the above scheme, we can see that the packaging bag innovatively opens an open groove with an elliptical smooth structure at the center of the LDPE film. This design significantly improves the flexibility and adaptability of the packaging. The existence of the open groove makes it easier for the packaging bag to accommodate packaging boxes of different shapes and sizes, effectively avoiding the problem of poor sealing caused by size mismatch. At the same time, the elliptical smooth structure design is not only beautiful, but also effectively reduces the stress concentration phenomenon of the packaging material when it is stressed, extending the service life of the packaging bag. In addition, the design also makes it easier for users to quickly identify and open the packaging bag, improving the user experience.

[0014] Preferably, the anti-tampering sticker includes a seal and a lift piece, one end of the seal is connected to the side surface of the HDPE bag, and the lift piece is arranged at the other end of the seal.

[0015] From the above scheme, it can be seen that the anti-tampering sticker design including the seal and the flap can significantly enhance the anti-counterfeiting and safety of the packaging. The firm connection between the seal and the side surface of the HDPE bag, as well as the clever setting of the flap, together form a sealing system that is difficult to be illegally destroyed. Once the packaging bag is opened without authorization, the connection state of the seal and the flap will change significantly, thus providing users with intuitive anti-tampering instructions. This design not only effectively prevents the illegal replacement or tampering of the items in the package, but also provides users with a convenient means of inspection, improving the reliability of the packaging and user satisfaction.

[0016] Preferably, two opposite sides of the HDPE bag are provided with slits, the slits are connected to the inside of the HDPE bag, and the HDPE bag and the anti-tampering sticker are located opposite to each other.

[0017] From the above scheme, it can be seen that by opening slits connected to the inside on opposite sides of the HDPE bag and cleverly setting the anti-tampering stickers at a position opposite to the slits, the sealing and safety of the packaging are both improved. The design of the slits not only facilitates users to perform local operations without destroying the overall structure of the packaging bag, such as pasting anti-tampering stickers, but also enhances the air permeability and visibility of the packaging bag. At the same time, the relative position relationship between the anti-tampering stickers and the slits ensures that once the packaging bag is illegally opened, the integrity of the anti-tampering stickers will be destroyed, thereby providing users with a clear anti-tampering warning and effectively ensuring the safety of the items in the package.

[0018] Preferably, a rubber strip is installed on the inner surface of the seal, the height of the rubber strip matches the groove height of the slit, and the width of the rubber strip is greater than the groove width of the slit.

[0019] From the above scheme, we can know that: by designing the rubber strip installed on the inner surface of the seal to match the seam groove on the HDPE bag, and the innovative structure that the rubber strip height is consistent with the groove height and the width is slightly larger than the groove width, the sealing and anti-tampering properties of the packaging are significantly enhanced. This design not only ensures that the rubber strip can fit tightly in the seam groove to form a firm sealing effect to prevent external air, moisture, etc. from entering the packaging bag, but also ensures that once the packaging bag is illegally opened, the rubber strip will break or deform due to the force, thereby providing users with intuitive anti-tampering evidence. In addition, this design also improves the reliability and durability of the packaging and extends the service life of the packaging bag.

[0020] Preferably, the width of the rocker wing is greater than half the width of the HDPE bag.

[0021] From the above solution, we can see that the innovative structure of designing the width of the swing wing to be greater than half the width of the HDPE bag significantly improves the stability and sealing effect of the packaging. The wider swing wing not only enhances the structural strength of the packaging bag during the folding and sealing process, allowing the packaging bag to better wrap and fix the packaging box to prevent it from shifting or breaking during transportation or storage, but also improves the sealing of the open end of the packaging bag, effectively preventing external contaminants from entering the interior of the packaging bag. In addition, the design also provides users with a larger operating space, facilitating operations such as packaging, sealing and carrying, and improving user experience and practicality of packaging.

[0022] Preferably, two side ends of the LDPE film are connected to the inner wall surface of the HDPE bag, and gaps are provided between the other two side ends of the LDPE film and the inner wall surface of the HDPE bag.

[0023] From the above scheme, it can be seen that the innovative structure of connecting the two ends of the LDPE film to the inner wall of the HDPE bag and setting slots on the other two ends significantly improves the adaptability and sealing performance of the packaging. This design enables the LDPE film to expand and deform to a certain extent when subjected to external forces, so as to better adapt to packaging boxes of different shapes and sizes and ensure the tightness and stability of the packaging. At the same time, the setting of the slot also makes it easier for users to quickly open the packaging bag when needed, improving the convenience and practicality of the packaging. In addition, this design also helps to reduce the use of packaging materials and achieve the goal of environmental protection and energy saving.

[0024] Preferably, the length of the slit groove is greater than the shortest distance between the inner groove surface of the open groove and the inner groove surface of the gap groove.

[0025] From the above scheme, it can be seen that: by designing an innovative structure in which the length of the slit is greater than the shortest distance between the inner groove surface of the open groove and the inner groove surface of the gap groove, the flexibility and sealing of the packaging are significantly enhanced. This design allows the adhesive strip of the anti-tampering sticker to pass through the slit more easily and fit tightly with the LDPE film during the packaging process, forming a firm sealing effect. At the same time, due to the increase in the length of the slit, it provides users with a larger operating space and fault tolerance, reduces the difficulty of packaging, and improves packaging efficiency. In addition, this design also helps to improve the overall strength and durability of the packaging bag, extend its service life, and bring users a more convenient and reliable packaging experience.

[0026] Preferably, the middle ends of the two lifting straps are flush with the vertical height of the rocking wing.

[0027] From the above solution, it can be seen that the innovative structure of designing the middle position of the two lifting straps to be level with the vertical height of the swing wing significantly improves the convenience of user carrying and operation. This design enables the lifting straps to evenly distribute the weight when subjected to force, reduces the shaking and instability of the packaging bag during carrying, and improves the user experience. At the same time, the level position of the lifting straps also makes it easier for users to quickly identify and grasp them, reduces the difficulty of operation, and improves the practicality and convenience of packaging.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A PE film packaging bag with a double-layer sealing structure, through the combination of LDPE film and HDPE bag, realizes efficient sealing and fixing of the packaging box. The LDPE film can fit tightly to the seam position of the packaging box, effectively preventing the shaking and leakage of food during transportation, while maintaining the freshness and taste of the food. The size of the packaging bag matches the packaging box, avoiding the problem of movement, squeezing or deformation caused by too large a space, thereby ensuring the safety and integrity of the food during the distribution process.

[0030] 2. A PE film packaging bag with a double-layer sealing structure achieves convenience and safety of packaging through the ingenious combination of components such as lifting straps, rocking wings and anti-tampering stickers. The design of the lifting straps makes the packaging bag easy to carry and lift. At the same time, the cross-flipped lifting straps can effectively prevent the packaging bag from slipping during the lifting process. The width of the rocking wings is greater than half of the HDPE bag and can completely cover the open end of the packaging bag to ensure that the packaging box is completely wrapped. The use of anti-tampering stickers further enhances the anti-theft and anti-tampering functions of the packaging bag. Once an external force attempts to destroy the packaging, the anti-tampering sticker will immediately appear, effectively protecting the rights and interests of buyers.

[0031] 3. A PE film packaging bag with a double-layer sealing structure, by providing components such as slots and rubber strips, enables the packaging bag to be quickly and conveniently unpacked, while avoiding the damage and waste that may be caused by traditional packaging bags during the unpacking process. After unpacking, the LDPE film can be divided into two and hung on the two inner sides of the HDPE bag, increasing the thickness of the bag body, facilitating subsequent use, thereby improving the reuse rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the HDPE bag of the present invention in an inverted state;

[0034] Figure 3 This is a schematic diagram of the structure of the lifting belts in the crossed state of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the lifting belt of the present invention in a flipping state;

[0036] Figure 5 It is a schematic diagram of the structure of the anti-tampering sticker of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of the rubber strip of the present invention;

[0038] Figure 7 It is a schematic diagram of the slot structure of the present invention;

[0039] Figure 8 It is a schematic diagram of the planar structure of the present invention.

[0040] In the figure: 1. HDPE bag; 11. seam groove; 2. anti-tampering sticker; 21. seal; 22. lift piece; 23. adhesive strip; 3. LDPE film; 31. open groove; 32. gap groove; 4. swing wing; 5. lifting strap; 6. bonding end. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 8 The present invention provides a PE film packaging bag with a double-layer sealing structure, and the technical solution is as follows:

[0043] A PE film packaging bag with a double-layer sealing structure comprises a HDPE bag 1 and a lifting strap 5 arranged on the surface of the HDPE bag 1, and also comprises an anti-tampering strip 2, a LDPE film 3, a rocker wing 4 and an adhesive end 6, wherein two of the anti-tampering strips 2 are installed on both side end surfaces of the HDPE bag 1, the LDPE film 3 is arranged inside the open end of the HDPE bag 1, and the two rockers 4 are installed on both sides of the open end of the HDPE bag 1, and the lifting strap 5 is arranged on the outer surface of the rocker wing 4. The inverted HDPE bag 1 drives the LDPE film 3 to be located at the upper end of the packaging box, and the LDPE film 3 after extension and deformation is attached to the side end surface of the packaging box, the HDPE bag 1 covers the outer end of the packaging box, the LDPE film 3 is attached to the HDPE bag 1, and the two rockers 4 folded inward continuously cover the open end of the HDPE bag 1 and wrap the bottom of the packaging box. The two lifting straps 5 are crossed and flipped and then meet on the opposite side of the opening position.

[0044] In this embodiment, the LDPE film 3 is made of LDPE material, and the remaining components except the rubber strip 23 are all made of HDPE material. The LDPE film 3 is an integrated structure. After the edge surface of the packaging box is wrapped and bonded, it not only seals the seam position to maintain the freshness, but also has an effective fixing effect, and there will be no looseness problem, and no need for multiple turns of winding, which reduces material waste. The packaging bag is completely matched with the size of the packaging box, and there will be no movement, extrusion or deformation due to excessive accommodating space. This packaging method is simple and convenient, and the bag body, sealing film and sealing sticker are an integrated structure, which effectively shortens the packaging time.

[0045] As an embodiment of the present invention, refer to Figure 1 and Figure 2 Both ends of the lifting strap 5 are provided with bonding ends 6, and the lifting strap 5 is connected to the outer surface of the rocking wing 4 through the bonding ends 6. The bonding ends 6 are located at the side ends of the rocking wing 4, and the distance between the two bonding ends 6 on one side is greater than the distance between the two bonding ends 6 on the other side.

[0046] In this embodiment, the distance difference between the bonding ends 6 of the two lifting belts 5 is utilized to facilitate the crossing of the two lifting belts 5, so as to facilitate finding the center position of the lifting.

[0047] As an embodiment of the present invention, refer to Figure 5 An open groove 31 is provided at the center of the LDPE film 3, and the open groove 31 is an elliptical smooth structure.

[0048] In this embodiment, the open groove 31 becomes a stress concentration area. When subjected to external forces such as tension or compression, the stress in this area will increase significantly, so that the LDPE film 3 can be stretched and deformed, and the LDPE film 3 can quickly wrap the seam position of the box body. The smooth elliptical structure is used to prevent cracks from occurring during the stretching process.

[0049] As an embodiment of the present invention, refer to Figure 5 The anti-tampering sticker 2 includes a seal 21 and a lift piece 22 . One end of the seal 21 is connected to the side surface of the HDPE bag 1 , and the lift piece 22 is arranged at the other end of the seal 21 .

[0050] In this embodiment, one end of the anti-tampering sticker 2 is integrated with the HDPE bag 1, and the lifting piece 22 is convenient for the operator to lift and stick.

[0051] As an embodiment of the present invention, refer to Figure 6 The HDPE bag 1 is provided with slits 11 on opposite sides thereof, the slits 11 are connected to the inside of the HDPE bag 1 , and the HDPE bag 1 is opposite to the anti-tampering sticker 2 .

[0052] In this embodiment, the tamper-evident sticker 2 is connected to the LDPE film 3 via the slit 11 to facilitate the lamination between the HDPE bag 1 and the LDPE film 3 .

[0053] As an embodiment of the present invention, refer to Figure 6 A rubber strip 23 is installed on the inner surface of the seal 21 , the height of the rubber strip 23 matches the groove height of the slot 11 , and the width of the rubber strip 23 is greater than the groove width of the slot 11 .

[0054] In this embodiment, the inner side of the lift tab 22 is not provided with the adhesive strip 23 , and the lift tab 22 is always in a convenient pinching state, and the adhesive strip 23 can simultaneously bond the outer edge surface of the slot 11 and the surface of the LDPE film 3 .

[0055] As an embodiment of the present invention, refer to Figure 3 The width of the rocker 4 is greater than half the width of the HDPE bag 1 .

[0056] In this embodiment, when the two flaps 4 are folded successively, since the width is greater than half of the HDPE bag 1, no gap will appear at the bottom of the packaging box, so that the whole packaging box can be fully wrapped.

[0057] As an embodiment of the present invention, refer to Figure 7 The two side ends of the LDPE film 3 are connected to the inner wall surface of the HDPE bag 1 , and a gap 32 is provided between the other two side ends of the LDPE film 3 and the inner wall surface of the HDPE bag 1 .

[0058] In this embodiment, due to the presence of the slots 32 , only two side ends of the LDPE film 3 are connected to the HDPE bag 1 , so that the LDPE film 3 can be easily disassembled when the package is unpacked.

[0059] As an embodiment of the present invention, refer to Figure 5 The length of the slot 11 is greater than the shortest distance between the inner slot surface of the open slot 31 and the inner slot surface of the gap slot 32 .

[0060] In this embodiment, the shortest distance is smaller than the height of the slot 11 and smaller than the length of the adhesive strip 23, so that the adhesive strip 23 can fully adhere to the shortest distance, and during the disassembly process of the LDPE film 3, the LDPE film 3 can be quickly divided into two.

[0061] As an embodiment of the present invention, refer to Figure 1-Figure 4 as well as Figure 8 The middle ends of the two lifting belts 5 are aligned with the vertical height of the rocker 4 .

[0062] In this embodiment, during the delivery process, the lifting position is located in the middle of the top of the packaging box, which is at the center of gravity. The packaging box can remain stable during the lifting process, and the box body will not tilt. The shape and placement of Japanese food such as sushi and sashimi are effectively maintained, and the takeaway quality of the food is improved. The safety of this packaging method no longer depends on the strong seal of the sealing sticker, and the unpacking method is fast and convenient. When the deliveryman has malicious intentions towards the takeaway, he can only remove it through the anti-tampering sticker 2. This removal method will definitely attract the attention of buyers.

[0063] Working principle: turn the HDPE bag 1 upside down and place it just above the packaging box, press downward to push the packaging box into the HDPE bag 1, and the LDPE film 3 will stretch and deform to fit tightly against the seam between the box cover and the box body to complete the initial sealing; the two flaps 4 are folded successively at the opening of the HDPE bag 1, and the bottom of the packaging box is sealed. A lifting strap 5 is inserted into the inner side of another lifting strap 5, and the two are turned over and meet on the opposite side of the opening, which can be used for lifting, tearing off the covering film of the adhesive strip 23, and the adhesive strip 23 is bonded to the LDPE film 3 through the seam groove 11, and the LDPE film 3 and the inner surface of the HDPE bag 1 are fitted and fixed to complete the secondary sealing.

[0064] Specifically, a packaging box containing Japanese food such as sushi and sashimi is placed on a table, and the HDPE bag 1 is turned upside down and gradually covers the surface of the packaging box. Under the action of the pulling force, the open groove 31 is a stress concentration area, and the LDPE film 3 gradually stretches and deforms from the open groove 31 until it is wrapped around the side end surface of the packaging box. At this time, the packaging box has been completely stored inside the HDPE bag 1;

[0065] The packing personnel lift up the box body and the bag body, and fold the two flaps 4 at the bottom successively. Since the width of the flaps 4 is greater than half the width of the HDPE bag 1, the two flaps 4 after folding can completely cover the open end of the HDPE bag 1, that is, the surface of the packaging box is completely wrapped;

[0066] The lifting tape 5 with the shorter distance between the two bonding ends 6 is inserted into the inner side of the lifting tape 5 with the longer distance between the two bonding ends 6, and then the box body and the bag body are placed on the table, and the two lifting tapes 5 are placed on both sides thereof, and the covering film of the adhesive strip 23 is torn off, and the adhesive strip 23 is bonded to the two side end surfaces of the slot 11 and the LDPE film 3 inside the slot 11, and the packaging box is wrapped and sealed;

[0067] The lifting belts 5 on both sides are combined to form a lifting state, which is convenient for the deliveryman to pick up and deliver;

[0068] After receiving the takeaway, the buyer spreads the cross-shaped lifting straps 5 to both sides of the HDPE bag 1, pinches the lifting tab 22, and tears the sealing strip 21 along the slit 11. Due to the material density of the HDPE bag 1 and the LDPE film 3, the adhesive strip 23 can be gently separated from the surface of the HDPE bag 1, and the adhesive part of the LDPE film 3 and the adhesive strip 23 will be split during the tearing process. The LDPE film 3 no longer has a tightly fitting wrapping effect on the packaging box. The packaging box can be smoothly separated from the HDPE bag 1 by gently lifting the corners of the HDPE bag 1.

[0069] The sealing strip 21 is re-attached to the position of the slit 11 to seal the slit 11. The HDPE bag 1 is still a complete bag body. After the bonding part of the LDPE film 3 is torn, the LDPE film 3 is divided into two. Since the adhesive strip 23 of the LDPE film 3 is not connected to the HDPE bag 1, the split LDPE film 3 hangs on the two inner sides of the HDPE bag 1 to increase the thickness of the bag body, so as to facilitate subsequent use and improve the reuse rate.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PE film packaging bag with a double-layer sealing structure, comprising a HDPE bag (1) and a lifting strap (5) arranged on the surface of the HDPE bag (1), characterized in that: The packaging box also includes an anti-tampering strip (2), an LDPE film (3), a swing wing (4) and an adhesive end (6). The two anti-tampering strips (2) are installed on both side end surfaces of the HDPE bag (1). The LDPE film (3) is arranged inside the open end of the HDPE bag (1). The two swing wings (4) are installed on both sides of the open end of the HDPE bag (1). The pull belt (5) is arranged on the outer surface of the swing wing (4). The inverted HDPE bag (1) drives the LDPE film (3) to be located at the upper end of the packaging box. The stretched and deformed LDPE film (3) is attached to the side end surface of the packaging box. The HDPE bag (1) covers the outer end of the packaging box. The LDPE film (3) is attached to the HDPE bag (1). The two swing wings (4) folded inward continuously cover the open end of the HDPE bag (1) and wrap the bottom of the packaging box. The two pull belts (5) are crossed and turned over and then meet on the opposite side of the opening position.

2. The PE film packaging bag with a double-layer sealing structure according to claim 1, characterized in that: Both ends of the lifting strap (5) are provided with bonding ends (6), and the lifting strap (5) is connected to the outer surface of the rocker wing (4) through the bonding ends (6). The bonding ends (6) are located at the side ends of the rocker wing (4), and the distance between the two bonding ends (6) on one side is greater than the distance between the two bonding ends (6) on the other side.

3. The PE film packaging bag with a double-layer sealing structure according to claim 1, characterized in that: An open groove (31) is provided at the center of the LDPE film (3), and the open groove (31) is an elliptical smooth structure.

4. The PE film packaging bag with a double-layer sealing structure according to claim 3, characterized in that: The anti-tampering sticker (2) comprises a seal (21) and a lift piece (22); one end of the seal (21) is connected to the side surface of the HDPE bag (1), and the lift piece (22) is arranged on the other end of the seal (21).

5. The PE film packaging bag with a double-layer sealing structure according to claim 4, characterized in that: The HDPE bag (1) is provided with slits (11) on opposite sides thereof, the slits (11) are connected to the interior of the HDPE bag (1), and the HDPE bag (1) and the anti-tampering sticker (2) are located opposite to each other.

6. The PE film packaging bag with a double-layer sealing structure according to claim 5, characterized in that: A rubber strip (23) is installed on the inner surface of the seal strip (21), the height of the rubber strip (23) matches the groove height of the slit (11), and the width of the rubber strip (23) is greater than the groove width of the slit (11).

7. The PE film packaging bag with a double-layer sealing structure according to claim 1, characterized in that: The width of the rocker wing (4) is greater than half the width of the HDPE bag (1).

8. The PE film packaging bag with a double-layer sealing structure according to claim 5, characterized in that: The two side ends of the LDPE film (3) are connected to the inner wall surface of the HDPE bag (1), and gap grooves (32) are provided between the other two side ends of the LDPE film (3) and the inner wall surface of the HDPE bag (1).

9. The PE film packaging bag with a double-layer sealing structure according to claim 8, characterized in that: The length of the slit groove (11) is greater than the shortest distance between the inner groove surface of the open groove (31) and the inner groove surface of the gap groove (32).

10. The PE film packaging bag with a double-layer sealing structure according to claim 1, characterized in that: The middle ends of the two lifting belts (5) are aligned with the vertical height of the rocking wing (4).

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