Aquatic product packaging bag and manufacturing method thereof

Abstract

The embodiment of the invention discloses an aquatic product packaging bag and a manufacturing method of the aquatic product packaging bag. The packaging bag is used for keeping alive and sealing when fresh aquatic products are sold in a physical store, and comprises a first bag body, a second bag body, a first air inlet valve and a second air inlet valve, the first bag body is sleeved with the second bag body, the bottom of the first bag body and the bottom of the second bag body are connected in a sealed mode to form a bottom sealing edge, and a blocking space is formed between the outer periphery of the first bag body and the inner periphery of the second bag body. The first air inlet valve comprises a first air inlet end extending out of the bottom sealing edge and a first air outlet end extending to the aquatic product accommodating space in the first bag body; the second air inlet valve comprises a second air inlet end extending out of the bottom sealing edge and a second air outlet end extending to the blocking space; after fresh aquatic products are contained in the containing space and are sealed in a water filling mode, oxygen is filled into the containing space through the first air inlet valve, and air is filled into the blocking space through the second air inlet valve. The aim of keeping fresh aquatic products alive is fulfilled.

Description

Technical Field

[0001] The present application relates to the technical field of product storage, and in particular to an aquatic product packaging bag and a method for manufacturing the aquatic product packaging bag. Background Art

[0002] Fresh aquatic products are not resistant to storage. After leaving the water, they need to be packed into bags, filled with water and oxygen, and then sealed to reduce the mortality rate of aquatic products during transportation and achieve the purpose of keeping aquatic products fresh. However, when current packaging bags are used to hold aquatic products with sharp thorns such as swimming crabs and mantis shrimps, the sharp thorns often pierce the packaging bags, causing the fresh aquatic products in the bags to die due to lack of water and oxygen.

[0003] How to solve the problem of fresh aquatic products dying due to puncture of packaging bags has become a technical problem that needs to be solved by technicians in this field. Summary of the invention

[0004] The present application provides an aquatic product packaging bag and a method for making an aquatic product packaging bag, which can effectively reduce the probability of death of aquatic products due to leakage of liquid and oxygen in the bag when the packaging bag is punctured, thereby achieving the purpose of keeping fresh aquatic products alive.

[0005] This application provides the following solutions:

[0006] A packaging bag for aquatic products, used for preserving and sealing fresh aquatic products when selling them in a physical store, the packaging bag comprising: a first bag body, a second bag body, a first air inlet valve and a second air inlet valve;

[0007] The first bag body is inserted into the second bag body, and the bottom of the first bag body is sealed and connected with the bottom of the second bag body to form a bottom sealing edge, and a barrier space for separating the two bag bodies is formed between the outer periphery of the first bag body and the inner periphery of the second bag body;

[0008] The first air inlet valve includes a first air inlet end extending beyond the bottom seal and a first air outlet end extending to the aquatic product accommodating space formed inside the first bag body; the second air inlet valve includes a second air inlet end extending beyond the bottom seal and a second air outlet end extending into the barrier space; after the fresh aquatic product is placed in the accommodating space and sealed with water, the accommodating space is oxygenated through the first air inlet valve and the barrier space is inflated through the second air inlet valve.

[0009] The outer periphery of the first air inlet valve is sealed and fixed to the inner side of the bottom of the first bag body, and the outer periphery of the second air inlet valve is sealed and fixed to the outer side of the bottom of the first bag body and the inner side of the bottom of the second bag body.

[0010] Wherein, the distance between the outer circumference of the first bag body and the inner circumference of the second bag body is 1 cm to 2 cm.

[0011] Wherein, the amount of air charged into the blocking space through the second air inlet valve is 20% to 50%.

[0012] The first bag body is made of a multi-layer composite material, and includes, from the inside to the outside, a PE layer, a PA layer and a PE layer.

[0013] Wherein, the thickness of the first bag body is not less than 150 μm.

[0014] The second bag body is made of a multi-layer composite material, which includes, from the inside to the outside, a PE layer, a PA layer and a PET layer.

[0015] Wherein, the thickness of the second bag body is not less than 120 μm.

[0016] Wherein, the top opening of the first bag body and the top opening of the second bag body are both in an unfolded state, and after aquatic products are placed in the accommodating space and water is filled in, the top opening of the first bag body and the top opening of the second bag body are sealed and closed.

[0017] Wherein, the top opening of the second bag body is sealed and connected to the outer periphery of the first bag body;

[0018] The top opening of the first bag body is in an unfolded state, and after aquatic products are placed in the accommodating space and the accommodating space is filled with water, the top opening of the first bag body is sealed and closed.

[0019] A method for making an aquatic product packaging bag, which is used to seal fresh aquatic products sold in physical stores through the packaging bag, the method comprising:

[0020] The first bag body is placed inside the second bag body and the bottoms are aligned;

[0021] The first air inlet valve is inserted into the first bag body through the bottom of the first bag body, and the first air inlet end of the first air inlet valve extends out of the bottom of the first bag body; and the second air inlet valve is inserted between the first bag body and the second bag body through the bottom of the second bag body, and the second air inlet end of the second air inlet valve extends out of the bottom of the second bag body;

[0022] The bottom is sealed to seal the bottom of the first bag body and the bottom of the second bag body to form a bottom sealed edge, and to form a water product accommodating space inside the first bag body, and a barrier space between the first bag body and the second bag body, wherein the first air outlet end of the first air inlet valve extends into the accommodating space, and the second air outlet end of the second air inlet valve extends into the barrier space.

[0023] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0024] In the embodiment of the present application, a double-layer aquatic product packaging bag can be provided, in which the first bag body is placed inside the second bag body, and an effective partition area is formed between the two bag bodies by partially inflating the barrier space formed between the two bag bodies. On the one hand, when the first bag body is punctured by the aquatic product contained inside, the barrier space can prevent the second bag body from being punctured, thereby preventing the liquid and oxygen in the first bag body from leaking out of the packaging bag; on the other hand, when the second bag body is punctured by a sharp component of the external environment, the barrier space can prevent the first bag body from being punctured, thereby effectively protecting the first bag body and preventing the liquid and oxygen in the bag body from leaking. In addition, even if both bag bodies are punctured and liquid leaks into the barrier space, since the barrier space itself has a certain pressure after inflation and the leaked liquid is very limited, it is difficult for this part of the liquid to leak out of the packaging bag, effectively reducing the probability of liquid leakage.

[0025] The above double-layer aquatic product packaging bag with a barrier space can effectively improve the puncture resistance of the packaging bag. Moreover, no matter the internal aquatic product punctures the first bag body or the sharp parts in the external environment puncture the second bag body, the barrier space can effectively reduce the probability of death of aquatic products due to leakage of liquid and oxygen in the bag, thereby achieving the purpose of keeping fresh aquatic products alive.

[0026] Of course, any product implementing the present application does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a schematic diagram of aquatic product packaging bag provided in an embodiment of the present application;

[0029] Figure 2is a cross-sectional schematic diagram of the aquatic product packaging bag provided in an embodiment of the present application in use;

[0030] Figure 3 It is a flow chart of a method for making aquatic product packaging bag provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0032] In order to prevent the death of aquatic products due to sharp thorns of aquatic products piercing the packaging bag, and to improve the ability of the packaging bag to preserve and keep fresh aquatic products alive, the inventors found after a lot of research and experiments that for the currently used single-layer packaging bags, whether changing the material type or thickening the material, they cannot meet the requirement of not being punctured. Correspondingly, the embodiment of the present application provides a double-layer design of aquatic product packaging bag, which effectively solves the problem of liquid leakage when the packaging bag is punctured.

[0033] See also Figure 1 As shown, the aquatic product packaging bag of the embodiment of the present application may include: a first bag body 10 , a second bag body 20 , a first air inlet valve 30 and a second air inlet valve 40 .

[0034] The first bag body is mounted inside the second bag body, and the bottom of the first bag body is sealed and connected to the bottom of the second bag body to form a bottom seal, and a barrier space 50 for separating the two bag bodies is formed between the outer periphery of the first bag body and the inner periphery of the second bag body. The first air inlet valve includes a first air inlet end extending outside the bottom seal and a first air outlet end extending to the aquatic product accommodating space 60 formed inside the first bag body; the second air inlet valve includes a second air inlet end extending outside the bottom seal and a second air outlet end extending into the barrier space; after the fresh aquatic product is placed in the accommodating space and sealed with water, the accommodating space is oxygenated through the first air inlet valve and the barrier space is inflated through the second air inlet valve.

[0035] That is to say, the circumferential dimension of the first bag body is smaller than that of the second bag body. For example, after the first bag body is inserted into the second bag body, the distance between the outer circumference of the first bag body and the inner circumference of the second bag body can be 1cm to 2cm. In this way, it can ensure that the barrier space is large enough to form an effective partition area between the two bag bodies after the barrier space is inflated, which has a good anti-puncture and anti-leakage effect. It can also avoid the barrier space being too large, resulting in an increase in the cost of the bag body and the unstable placement of the packaging bag after the aquatic products are filled.

[0036] The bottoms of the assembled first bag body and the second bag body are sealed, and it is ensured that the outer periphery of the first air inlet valve is sealed and fixed to the inner side of the bottom of the first bag body, and the outer periphery of the second air inlet valve is sealed and fixed to the outer side of the bottom of the first bag body and the inner side of the bottom of the second bag body, thereby forming a double-layer aquatic product packaging bag according to the embodiment of the present application.

[0037] As an example, the first bag body and the second bag body can be rectangular transparent sealable plastic packaging bags, and the cross-section of the packaging bags is Figure 2 Shape shown.

[0038] Specifically, after the bottoms of the two bag bodies are sealed, a storage space for fresh aquatic products can be formed inside the first bag body, and a barrier space can be formed between the first bag body and the second bag body. In this way, when a physical store sells fresh aquatic products, the fresh aquatic products can be placed in the storage space through the top opening of the first bag body, and water can be injected into the storage space through the top opening. Of course, the injected water can also contain appropriate nutrients, which can be determined according to usage requirements.

[0039] After the aquatic products are placed and filled with water, the top opening in the expanded state can be sealed and closed, so that the accommodating space and the barrier space are in a closed state, and then oxygen is added to the accommodating space through the first air inlet valve to ensure the oxygen content of the aquatic products in the accommodating space, and the barrier space is partially inflated through the second air inlet valve to ensure that an effective partition area is formed between the two bag bodies after the barrier space expands.

[0040] The partially inflated barrier space in the embodiment of the present application can provide an effective isolation space and an appropriate isolation pressure between the two bag bodies. In this way, when the first bag body is punctured by the sharp thorns of aquatic products, the sharp thorns can be prevented from further puncturing the second bag body, effectively preventing the liquid and oxygen inside the first bag body from leaking out of the packaging bag, thereby ensuring the freshness of the aquatic products. When the second bag body is punctured by a sharp component in the external environment of the packaging bag, the sharp component can also be prevented from further penetrating the first bag body, effectively protecting the first bag body. For example, when delivering goods in scenarios such as supermarkets and new retail, a single delivery task may deliver multiple items at the same time. When the aquatic product packaging bag is packed in the same delivery box as other goods, the sharp components of other goods may puncture the second bag body of the packaging bag. The partially inflated barrier space can effectively protect the first bag body from being punctured by sharp components.

[0041] In addition, when both the first bag body and the second bag body are punctured, the liquid in the first bag body may leak into the barrier space because the pressure of the accommodating space is greater than the pressure of the barrier space. However, since the liquid leaked into the barrier space is relatively limited and the barrier space itself also has a certain pressure, this part of the liquid is difficult to leak to the outside of the packaging bag, which can also prevent the liquid from leaking out and effectively reduce the probability of liquid leakage.

[0042] As a preferred solution, the amount of gas charged into the barrier space through the second air inlet valve can be 20% to 50%. In practical applications, the gas charged can be oxygen or other gases determined according to usage requirements, which is not limited in the present embodiment.

[0043] In addition, the embodiment of the present application also optimizes the design of the material of the double-layer bag body. Among them, the first bag body can be embodied as a multi-layer composite material, and includes, from the inside to the outside, a PE layer (Polyethylene), a PA layer (Polyamide) and a PE layer, and each layer is compounded together by a multi-layer co-extrusion technology. Preferably, the thickness of the first bag body is not less than 150μm. Such a material can achieve double-sided heat sealing and minimize the probability of puncture, thereby enhancing the anti-puncture ability of the first bag body from the perspective of material design.

[0044] The second bag body can be embodied as a multi-layer composite material, and includes, from the inside to the outside, a PE layer, a PA layer and a PET layer (Polyethylene terephthalate), and each layer is compounded together by a multi-layer co-extrusion technology. Preferably, the thickness of the second bag body is not less than 120 μm. Such a material can facilitate heat sealing and reduce the cost of the bag body. Because the packaging bag of the embodiment of the present application achieves the preservation of fresh aquatic products through a double-layer design and partially inflating the barrier space in the middle, the anti-puncture protection capability of the outer layer of the second bag body is not required to be high, so the thickness of the bag body can be relatively thin, which also helps to save the cost of the packaging bag.

[0045] Correspondingly, the embodiment of the present application can also provide a method for making aquatic product packaging bags, which is used to seal fresh aquatic products sold in physical stores through the made packaging bags. Figure 3 The flow chart shown may include the following processing steps:

[0046] S301: The first bag body is inserted into the second bag body and the bottoms are aligned.

[0047] S302: The first air inlet valve is inserted into the first bag body through the bottom of the first bag body, and the first air inlet end of the first air inlet valve extends out of the bottom of the first bag body; and the second air inlet valve is inserted between the first bag body and the second bag body through the bottom of the second bag body, and the second air inlet end of the second air inlet valve extends out of the bottom of the second bag body.

[0048] S303: The bottom is sealed to seal the bottom of the first bag body and the bottom of the second bag body to form a bottom sealed edge, and a water product accommodating space is formed inside the first bag body, and a barrier space is formed between the first bag body and the second bag body, wherein the first air outlet end of the first air inlet valve extends into the accommodating space, and the second air outlet end of the second air inlet valve extends into the barrier space.

[0049] In the embodiment of the present application, the packaging bag manufacturing equipment can also be modified in hardware so that it can realize the function of putting two bag bodies in a set, and installing and inserting two air inlet valves at appropriate positions at the bottom of the set bag bodies. In this way, during the packaging bag manufacturing process, the first bag body can be put into the second bag body through the manufacturing equipment and the bottoms can be aligned, and the first air inlet valve can be inserted into the bag body through the bottom of the first bag body, and the second air inlet valve can be inserted between the first bag body and the second bag body through the bottom of the second bag body, and then the bottom area can be sealed, so that the accommodation space and the barrier space in the embodiment of the present application can be naturally formed.

[0050] The air intake valve in the embodiment of the present application may be a one-way air intake valve from outside to inside. Figure 1 As shown, they are distributed up and down at the bottom of the packaging bag.

[0051] In addition, it should be noted that there are two ways to deal with the top openings of the first bag body and the second bag body:

[0052] Method 1: During the packaging bag manufacturing stage, the two openings may not be pre-processed, that is, the first bag body and the second bag body are only sealed and connected together at the bottom, and the top openings of both are in an open state. Correspondingly, during the packaging bag use stage, after the aquatic product is placed in the accommodating space and filled with water, the top openings of the two bag bodies are sealed together to form a closed accommodating space and a barrier space.

[0053] Method 2: During the packaging bag manufacturing stage, in addition to sealing the bottoms of the first bag body and the second bag body together, the top opening of the second bag body can also be sealed and connected to the periphery of the first bag body. In other words, a closed barrier space is formed during the manufacturing stage, and only the top opening of the first bag body is left unsealed and in an unfolded state. After the aquatic products are placed in the accommodating space and filled with water during the packaging bag use stage, the top opening of the first bag body is sealed and closed to form a closed accommodating space.

[0054] The following uses method 1 as an example to explain the use process of the double-layer packaging bag in the embodiment of the present application.

[0055] During specific use, the top openings of the first bag body and the second bag body are both in an unfolded state. First, the operator can place the aquatic product in the containing space, that is, inside the first bag body, through the opening of the first bag body, and inject a proper amount of water; then, the top openings of the first bag body and the second bag body can be heat-sealed after being heated for an appropriate time and temperature by a heat-sealing device, so that the tops of the two bag bodies are sealed and connected together; finally, the containing space and the barrier space can be oxygenated respectively through the first air inlet valve and the second air inlet valve to complete the aquatic product packaging process.

[0056] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0057] The above is a detailed introduction to the scheme provided by the present application. The principles and implementation methods of the present application are described in detail using specific examples. The description of the above embodiments is only used to help understand the scheme of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A packaging bag for aquatic products, characterized in that: Used for selling fresh aquatic products in physical stores through the packaging bag to keep them alive and seal, the packaging bag comprising: a first bag body, a second bag body, a first air inlet valve and a second air inlet valve; The first bag body is inserted into the second bag body, and the bottom of the first bag body is sealed and connected with the bottom of the second bag body to form a bottom sealing edge, and a barrier space for separating the two bag bodies is formed between the outer periphery of the first bag body and the inner periphery of the second bag body; The first air inlet valve includes a first air inlet end extending beyond the bottom seal and a first air outlet end extending to the aquatic product accommodating space formed inside the first bag body; the second air inlet valve includes a second air inlet end extending beyond the bottom seal and a second air outlet end extending into the barrier space; after the fresh aquatic product is placed in the accommodating space and sealed with water, the accommodating space is oxygenated through the first air inlet valve and the barrier space is inflated through the second air inlet valve.

2. The aquatic product packaging bag according to claim 1, characterized in that: The outer periphery of the first air inlet valve is sealed and fixed to the inner side of the bottom of the first bag body, and the outer periphery of the second air inlet valve is sealed and fixed to the outer side of the bottom of the first bag body and the inner side of the bottom of the second bag body.

3. The aquatic product packaging bag according to claim 1, characterized in that: The distance between the outer circumference of the first bag body and the inner circumference of the second bag body is 1 cm to 2 cm.

4. The aquatic product packaging bag according to claim 1, characterized in that: The amount of air charged into the blocking space through the second air inlet valve is 20% to 50%.

5. The aquatic product packaging bag according to any one of claims 1 to 4, characterized in that: The first bag body is made of a multi-layer composite material, and includes, from the inside to the outside, a PE layer, a PA layer and a PE layer.

6. The aquatic product packaging bag according to claim 5, characterized in that: The thickness of the first bag body is not less than 150 μm.

7. The aquatic product packaging bag according to any one of claims 1 to 4, characterized in that: The second bag body is made of a multi-layer composite material, and includes, from the inside to the outside, a PE layer, a PA layer and a PET layer.

8. The aquatic product packaging bag according to claim 7, characterized in that: The thickness of the second bag body is not less than 120 μm.

9. The aquatic product packaging bag according to any one of claims 1 to 4, characterized in that: The top opening of the first bag body and the top opening of the second bag body are both in an unfolded state, and after aquatic products are placed in the accommodating space and water is filled in, the top opening of the first bag body and the top opening of the second bag body are sealed and closed.

10. The aquatic product packaging bag according to any one of claims 1 to 4, characterized in that: The top opening of the second bag body is sealed and connected to the outer periphery of the first bag body; The top opening of the first bag body is in an unfolded state, and after aquatic products are placed in the accommodating space and the accommodating space is filled with water, the top opening of the first bag body is sealed and closed.

11. A method for making aquatic product packaging bag, characterized in that: The method is used for sealing fresh aquatic products sold in physical stores by using the packaging bag, and the method comprises: The first bag body is placed inside the second bag body and the bottoms are aligned; The first air inlet valve is inserted into the first bag body through the bottom of the first bag body, and the first air inlet end of the first air inlet valve extends out of the bottom of the first bag body; and the second air inlet valve is inserted between the first bag body and the second bag body through the bottom of the second bag body, and the second air inlet end of the second air inlet valve extends out of the bottom of the second bag body; The bottom is sealed to seal the bottom of the first bag body and the bottom of the second bag body to form a bottom sealed edge, and to form a water product accommodating space inside the first bag body, and a barrier space between the first bag body and the second bag body, wherein the first air outlet end of the first air inlet valve extends into the accommodating space, and the second air outlet end of the second air inlet valve extends into the barrier space.

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