Waterproof A-type packaging bag

Abstract

The utility model relates to the technical field of packaging bags, and particularly discloses a waterproof A-type packaging bag which comprises a bag body, an opening is formed in one end of the bag body, the opening comprises two sets of straight ends and two sets of bent ends, the two sets of bent ends are symmetrically arranged, the two sets of bent ends are arranged between the two sets of straight ends, and a waterproof coating is arranged on the inner wall of the bag body. The end, away from the opening, of the bag body is subjected to hot-pressing edge sealing treatment, and sealing pieces are arranged at the two straight ends and the two bent ends. Food is placed in the bag body through the opening, the opening is sealed through the sealing pieces on the two sets of straight ends and the two sets of bent ends, compared with an 8-shaped folding opening in the prior art, the end, away from the opening, of the bag body is further subjected to hot-pressing edge sealing treatment, and the sealing performance of the bag body is further improved; the waterproof coating can improve the waterproofness, so that the possibility that the bag body is broken when liquid leaks into the bag body is reduced, and the influence of the broken bag body on food conveying is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of packaging bags, in particular to a waterproof A-shaped packaging bag. BACKGROUND

[0002] The packaging bag is a flexible container for containing, protecting, transporting and displaying articles, usually made of plastic, paper, composite material or degradable material, the waterproof packaging bag is a special packaging category designed to resist liquid water penetration, through material modification, structure sealing or composite lamination process, a barrier is formed to prevent water molecules from penetrating, ensuring that the contents remain dry in humid, rainy, soaking and other environments, the waterproof packaging bag is widely used in food industry, electronic appliances and medical health fields.

[0003] In the prior art, the packaging bag generally comprises a packaging bag body and a handle rope, the packaging bag body is made of kraft paper, the handle rope is fixedly bonded to the inner wall of the packaging bag body, and the end of the packaging bag body away from the handle rope is folded to form an "8"-shaped fold; food is placed in the packaging bag body, the "8"-shaped fold can bear the food, the kraft paper packaging bag body has certain waterproofness and heat preservation function, and the packaging bag body can be lifted by the handle rope, so that the packaging and transportation of the food are realized.

[0004] For the related technology in the above, since the material of the packaging bag body is kraft paper, and one end of the packaging bag body is an "8"-shaped fold, the "8"-shaped fold usually has many gaps, and the end of the packaging bag body close to the handle rope is not closed, therefore, the waterproofness and sealing property of the packaging bag body are relatively poor, when liquid is spilled in the packaging bag, the packaging bag may be broken, thereby affecting the normal packaging and transportation of the food. Utility model content

[0005] In order to improve the sealing property and waterproofness of the packaging bag, the application provides a waterproof A-shaped packaging bag.

[0006] The waterproof A-shaped packaging bag provided by the application adopts the following technical scheme:

[0007] A waterproof A-shaped packaging bag, comprising a bag body, one end of the bag body is provided with an opening, the opening comprises a straight end and a bent end, the bent end comprises a first bent edge and a second bent edge, the straight end and the bent end are symmetrically provided with two groups, the two groups of bent ends are arranged between the two groups of straight ends, a waterproof coating is arranged on the inner wall of the bag body, one end of the bag body away from the opening is subjected to heat pressing edge sealing treatment, and the two groups of straight ends and the two groups of bent ends are provided with sealing pieces for sealing the opening.

[0008] By adopting the above technical solution, food is placed inside the bag through the opening, and the opening is sealed by the seals on two sets of straight ends and two sets of bent ends. Compared with the prior art which only has an "8" fold opening, the end of the bag body away from the opening in this application is also heat-sealed, which further improves the sealing performance of the bag body. The waterproof coating in this application can improve water resistance, thereby reducing the possibility of the bag body breaking when liquid leaks into the bag body, and thus reducing the impact of bag body breakage on food transportation.

[0009] Optionally, the waterproof coating is a PE coating.

[0010] By adopting the above technical solutions, the PE coating can improve the sealing and waterproof properties of the bag, and also improve the heat preservation effect of the bag on food.

[0011] Optionally, the bag body is provided with a handle, which is located on the outer wall of the bag body near the opening, and two sets of handles are symmetrically arranged.

[0012] By adopting the above technical solution, compared with the prior art in which the handle rope is fixedly glued to the inner wall of the packaging bag, the handle in this application is fixedly glued to the outer wall of the bag near the opening, which can reduce the impact of the handle on the sealing of the bag opening, thereby further improving the sealing performance of the bag; the two sets of handles can improve the stability and balance when using the bag.

[0013] Optionally, the end of the bag away from the opening is heat-sealed and then folded to form an "8" shaped seal.

[0014] By adopting the above technical solution, the possibility of liquid flowing out of the bag and liquid entering the bag from the outside can be reduced after the end heat sealing treatment, thereby improving the sealing and waterproof performance of the bag. In addition, the figure-eight seal formed by cross folding and bonding can improve the load-bearing capacity and structural stability of the bottom of the bag.

[0015] Optionally, a horizontal plate is provided on the side of the figure-eight seal away from the bag opening.

[0016] By adopting the above technical solution, the horizontal plate fixedly glued to the side of the figure-eight seal away from the bag opening can further improve the load-bearing capacity and structural stability of the bottom of the bag.

[0017] Optionally, the outer wall of the bag is provided with a reinforcing cardboard, the reinforcing cardboard is provided with two layers, the two ends of the handle are provided between the two layers of the reinforcing cardboard, and a waterproof membrane is provided on the side of the reinforcing cardboard away from the bag body.

[0018] By adopting the above technical solution, compared with the prior art in which the handle rope is fixedly bonded to the inner wall of the packaging bag, the two ends of the handle in this application are fixedly bonded between two layers of reinforcing cardboard, and the reinforcing cardboard is fixedly bonded to the outer wall of the bag, which can improve the stability and durability of the handle bonding; the waterproof membrane on the side of the reinforcing cardboard away from the bag can improve the waterproofness of the handle and the reinforcing cardboard, and reduce the impact of liquid on the handle and the reinforcing cardboard.

[0019] Optionally, the sealing element is a rubber strip, which is disposed on the inner wall of the two sets of straight ends and the two sets of bent ends.

[0020] By adopting the above technical solution, the two sets of bent ends and the two sets of straight ends are first bonded together, and then the remaining two sets of straight ends that are not bonded are bonded together, thereby achieving a seal on the opening of the bag and improving the sealing performance of the bag.

[0021] Optionally, the sealing element is a hook and loop fastener assembly, which is provided in three sets. One set of the hook and loop fastener assembly is provided on the inner wall of the two sets of straight ends, and the other two sets of the hook and loop fastener assembly are symmetrically provided on the inner wall of the two sets of bent ends. The hook and loop fastener assembly on the first bent edge of the two sets is rough-surfaced, and the hook and loop fastener assembly on the second bent edge of the two sets is hook-surfaced. The hook and loop fastener assembly on the straight end of the set closer to the first bent edge is hook-surfaced, and the hook and loop fastener assembly on the other set of straight ends is rough-surfaced.

[0022] By adopting the above technical solution, the rough surface of the two sets of first bent edge hook and loop fasteners is bonded to the hook surface of the straight end hook and loop fasteners, the hook surface of the two sets of second bent edge hook and loop fasteners is bonded to the rough surface of the straight end hook and loop fasteners, and then the rough surface and hook surface of the remaining two sets of straight end hook and loop fasteners that are not bonded are bonded together, thereby achieving a seal on the bag opening and improving the bag's sealing performance.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The waterproof coating in this application can improve the sealing and waterproof performance of the bag, and also improve the heat preservation effect of the bag on food, thereby reducing the possibility of the bag breaking when liquid leaks into the bag, and thus reducing the impact of bag breakage on food transportation; the waterproof membrane on the side of the reinforcing cardboard away from the bag can improve the waterproof performance of the handle and the reinforcing cardboard, and reduce the impact of liquid on the handle and the reinforcing cardboard.

[0025] 2. The sealing elements at the opening end and the heat-sealing treatment of the bag body away from the opening end in this application can improve the sealing performance of the bag body. The opening is sealed by the sealing elements on two sets of straight ends and two sets of bent ends. The end of the bag body away from the opening is also heat-sealed, which can reduce the possibility of liquid flowing out of the bag body and liquid entering the bag body from the outside, thereby achieving the sealing of the bag body and improving the sealing performance of the bag body.

[0026] 3. The figure-eight seal formed by cross-folding and bonding in this application can improve the load-bearing capacity and structural stability of the bottom of the bag. The horizontal plate fixedly bonded to the side of the figure-eight seal away from the bag opening can further improve the load-bearing capacity and structural stability of the bottom of the bag. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0029] Figure 2 yes Figure 1 Another perspective illustration;

[0030] Figure 3 yes Figure 2 Partial structural diagram;

[0031] Figure 4 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0032] Reference numerals: 1. Bag body; 2. Handle; 21. Reinforcing cardboard; 22. Waterproof membrane; 3. Straight end; 4. Bent end; 41. First bend edge; 42. Second bend edge; 5. Sealing element; 6. Figure-eight seal; 7. Horizontal plate. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0034] Example 1

[0035] This application discloses a waterproof type A packaging bag, as shown in the embodiments below. Figures 1-3The bag includes a bag body 1, with an opening at one end. The opening includes a straight end 3 and a bent end 4. The bent end 4 includes a first bent edge 41 and a second bent edge 42. Two sets of straight ends 3 and bent ends 4 are symmetrically arranged, and the two sets of bent ends 4 are located between the two sets of straight ends 3. The inner wall of the bag body 1 is coated with a waterproof coating. The end of the bag body 1 away from the opening is heat-sealed. Sealing elements 5 are fixedly bonded to the two sets of straight ends 3 and the two sets of bent ends 4.

[0036] Food is placed inside the bag body 1 through the opening, and the opening is sealed by the sealing elements 5 on the two sets of straight ends 3 and the two sets of bent ends 4. Compared with the prior art which only has an "8" fold opening, the end of the bag body 1 away from the opening in this embodiment is also heat-sealed, which further improves the sealing performance of the bag body 1. The waterproof coating in this embodiment can improve water resistance, thereby reducing the possibility of the bag body 1 breaking when liquid is spilled inside, and thus reducing the impact of the bag body 1 breaking on food transportation.

[0037] Reference Figure 1 To improve the waterproofness of the bag body 1 and reduce the possibility of the bag body 1 breaking when liquid leaks inside, the waterproof coating in this embodiment is a PE coating. The PE coating can improve the sealing and waterproofness of the bag body 1, and also improve the heat preservation effect of the bag body 1 on food. The waterproof coating in this embodiment can also be set as a PLA coating, an aluminized film layer, tin foil, a plastic-free coating, etc. Among them, the PLA coating and the plastic-free coating are biodegradable and relatively environmentally friendly, reducing environmental pollution. The aluminized film layer and the tin foil have good sealing and heat preservation properties, and are suitable for foods with high requirements for heat preservation and sealing.

[0038] Reference Figure 1 Compared to the prior art where the handle 2 is fixedly glued to the inner wall of the packaging bag body 1, in this embodiment, the handle 2 is fixedly glued to the bag body 1. The handle 2 is fixedly glued to the outer wall of the bag body 1 near the opening, and there are two sets of handles symmetrically glued to it. Since the handle 2 is fixedly glued to the outer wall of the bag body 1 near the opening, the impact of the handle 2 on sealing the opening of the bag body 1 can be reduced, thereby further improving the sealing performance of the bag body 1. In this embodiment, the handle is made of paper, which is more environmentally friendly and recyclable. If there are other requirements in practical applications, it can be replaced with plastic or other materials, which have better waterproof properties.

[0039] Reference Figure 3When packaging and transporting food, the bottom of the bag 1 needs to be airtight, waterproof, and load-bearing. Therefore, in this embodiment, the end of the bag 1 away from the opening is heat-sealed and then folded to form an "8"-shaped seal 6. After the end is heat-sealed, the possibility of liquid flowing out of the bag 1 and liquid entering the bag 1 from outside can be reduced, thereby improving the airtightness and waterproofness of the bag 1. Furthermore, the "8"-shaped seal 6 formed by cross-folding and bonding can improve the load-bearing capacity and structural stability of the bottom of the bag 1.

[0040] Reference Figure 2 If the food placed inside the bag 1 is heavy, the bottom of the bag 1 needs to have strong load-bearing capacity and structural stability. Therefore, in this embodiment, a horizontal plate 7 is fixedly glued to the side of the figure-eight seal 6 away from the bag opening. The horizontal plate 7 can further improve the load-bearing capacity and structural stability of the bottom of the bag 1. In this embodiment, the horizontal plate 7 is made of paper, which is a preferred material in this embodiment. In other embodiments, the horizontal plate 7 can be made of rigid plastic or other materials.

[0041] Reference Figure 4 Compared to the prior art where the handle 2 is fixedly bonded to the inner wall of the packaging bag body 1, the handle 2 in this embodiment can improve the stability and durability of the bonding. A reinforcing cardboard 21 is fixedly bonded to the outer wall of the bag body 1, and the reinforcing cardboard 21 has two layers. The two ends of the handle 2 are fixedly bonded between the two layers of reinforcing cardboard 21, thereby improving the stability and durability of the handle 2 bonding. A waterproof membrane 22 is fixedly bonded to the side of the reinforcing cardboard 21 away from the bag body 1, which can improve the waterproofness of the handle 2 and the reinforcing cardboard 21 and reduce the impact of liquid on the handle 2 and the reinforcing cardboard 21. In this embodiment, the reinforcing cardboard 21 is made of paper, which is a preferred material in this embodiment. In other embodiments, the reinforcing cardboard 21 can be made of rigid plastic, etc.

[0042] Reference Figure 1 To seal the opening of the bag body 1 and improve its sealing performance, the sealing element 5 in this embodiment is an adhesive strip, which is fixedly bonded to the inner walls of the two sets of straight ends 3 and the two sets of bent ends 4. First, the two sets of bent ends 4 are bonded to the adhesive strips of the two sets of straight ends 3 adjacent to them, and then the adhesive strips of the remaining two sets of straight ends 3 that are not bonded are bonded together, thereby achieving the sealing of the opening of the bag body 1 and improving the sealing performance of the bag body 1.

[0043] The implementation principle of a waterproof type A packaging bag in this application embodiment is as follows:

[0044] The waterproof coating can improve the sealing and waterproof performance of the bag body 1, and also improve the heat preservation effect of the bag body 1 on food, thereby reducing the possibility of the bag body 1 breaking when liquid leaks into the inside of the bag body 1, and thus reducing the impact of the bag body 1 breaking on food transportation; the waterproof membrane 22 is fixedly bonded to the side of the reinforcing cardboard 21 away from the bag body 1, and the waterproof membrane 22 can improve the waterproof performance of the handle 2 and the reinforcing cardboard 21, and reduce the impact of liquid on the handle 2 and the reinforcing cardboard 21;

[0045] The end of the bag body 1 away from the opening is heat-sealed, which reduces the possibility of liquid flowing out of the bag body 1 and liquid entering the bag body 1 from the outside, thereby improving the sealing and waterproof performance of the bag body 1. The two sets of bent ends 4 are respectively bonded to the adhesive strips of the two sets of straight ends 3 adjacent to them, and then the adhesive strips of the remaining two sets of straight ends 3 that are not bonded are bonded together, thereby sealing the bag body 1 and improving the sealing performance of the bag body 1.

[0046] After the end of the bag body 1 is heat-sealed, it is folded and glued to form an "8" shaped seal 6. The "8" shaped seal 6 can improve the load-bearing capacity and structural stability of the bottom of the bag body 1. In addition, the horizontal plate 7 is fixedly glued to the side of the "8" shaped seal 6 away from the bag opening. The fixedly glued horizontal plate 7 can further improve the load-bearing capacity and structural stability of the bottom of the bag body 1.

[0047] Example 2

[0048] The difference between this embodiment and Embodiment 1 is that:

[0049] Reference Figure 1 To seal the opening of the bag body 1 and improve its sealing performance, the sealing element 5 in this embodiment can also be a Velcro assembly. Three Velcro assemblies are provided. One set of Velcro assemblies is fixedly adhered to the inner walls of the two straight ends 3, and the other two sets of Velcro assemblies are symmetrically fixedly adhered to the inner walls of the two bent ends 4. The Velcro assemblies on the two first bent edges 41 are all rough-surfaced, while the Velcro assemblies on the two second bent edges 42 are all hook-surfaced. The Velcro assemblies closest to the first bent edge 41... One set of hook and loop fasteners on the straight end 3 has a hook side, and the other set of hook and loop fasteners on the straight end 3 has a rough side. The rough sides of the hook and loop fasteners on the two sets of first bent edges 41 are glued to the hook sides of the hook and loop fasteners on the straight end 3. The hook sides of the hook and loop fasteners on the two sets of second bent edges 42 are glued to the rough sides of the hook and loop fasteners on the straight end 3. Then the rough sides and hook sides of the remaining two sets of hook and loop fasteners on the straight end 3 that are not glued are glued together, thereby sealing the opening of the bag body 1 and improving the sealing performance of the bag body 1.

[0050] The implementation principle of a waterproof type A packaging bag in this application embodiment is as follows:

[0051] The rough surfaces of the hook and loop fasteners on the two sets of first bent edges 41 are bonded to the hook surfaces of the hook and loop fasteners on the straight end 3. The hook surfaces of the hook and loop fasteners on the two sets of second bent edges 42 are bonded to the rough surfaces of the hook and loop fasteners on the straight end 3. Then, the rough surfaces and hook surfaces of the remaining two sets of unbonded hook and loop fasteners on the straight end 3 are bonded together, thereby sealing the opening of the bag body 1 and improving the sealing performance of the bag body 1.

[0052] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar terms mean that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof type A packaging bag, characterized in that: The bag includes a bag body (1), one end of which has an opening. The opening includes a straight end (3) and a bent end (4). The bent end (4) includes a first bent edge (41) and a second bent edge (42). The straight end (3) and the bent end (4) are symmetrically arranged in two sets. The two sets of bent ends (4) are located between the two sets of straight ends (3). The inner wall of the bag body (1) is provided with a waterproof coating. The end of the bag body (1) away from the opening is heat-sealed. The two sets of straight ends (3) and the two sets of bent ends (4) are provided with sealing elements (5) for sealing the opening.

2. The waterproof type A packaging bag according to claim 1, characterized in that: The waterproof coating is a PE coating.

3. A waterproof type A packaging bag according to claim 1, characterized in that: The bag body (1) is provided with a handle (2), which is located on the outer wall of the bag body (1) near the opening, and two sets of handles (2) are symmetrically arranged.

4. A waterproof type A packaging bag according to claim 1, characterized in that: The end of the bag (1) away from the opening is heat-sealed and then folded to form an "8" shaped seal (6).

5. A waterproof type A packaging bag according to claim 4, characterized in that: A horizontal plate (7) is provided on the side of the figure-eight seal (6) away from the opening.

6. A waterproof type A packaging bag according to claim 3, characterized in that: The outer wall of the bag body (1) is provided with a reinforcing cardboard (21), which has two layers. The two ends of the handle (2) are located between the two layers of the reinforcing cardboard (21). A waterproof membrane (22) is provided on the side of the reinforcing cardboard (21) away from the bag body (1).

7. A waterproof type A packaging bag according to claim 1, characterized in that: The sealing element (5) is a rubber strip, which is disposed on the inner wall of the two sets of straight ends (3) and the two sets of bent ends (4).

8. A waterproof type A packaging bag according to claim 1, characterized in that: The sealing element (5) is a hook and loop fastener assembly. The hook and loop fastener assembly is provided in three sets. One set of the hook and loop fastener assembly is provided on the inner wall of the two sets of straight ends (3). The other two sets of the hook and loop fastener assembly are symmetrically provided on the inner wall of the two sets of bent ends (4). The hook and loop fastener assembly on the first bent edge (41) of the two sets is rough surface, and the hook and loop fastener assembly on the second bent edge (42) of the two sets is hook surface. The hook and loop fastener assembly on the straight end (3) near the first bent edge (41) is hook surface, and the hook and loop fastener assembly on the other set of straight end (3) is rough surface.

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