Fresh-keeping bag capable of automatically adjusting gas

Abstract

The utility model belongs to the technical field of preservation, and particularly relates to a self-air-adjusting preservation bag. The utility model provides a freshness protection bag capable of automatically adjusting gas. The freshness protection bag comprises a bag body and a sealing assembly. The bag body comprises an aluminum-plated film outer bag and a water-absorbing breathable layer compounded on the inner surface of the aluminum-plated film outer bag; at least two air holes are formed in the aluminum-plated film outer bag, air-permeable films are arranged on the air holes, and the air-permeable films completely cover the surfaces of the air holes in a sealed mode and are used for regulating and controlling the oxygen intake in the bag body; the sealing assembly comprises a first matching part and a second matching part, and the first matching part and the second matching part are arranged on the two sides of the opening of the bag body correspondingly and used for being matched with each other to achieve sealing of the bag body. The self-air-adjusting freshness protection bag is simple in structure, extra freshness protection additives and tool equipment are not needed, and the freshness protection time of fruits and vegetables can be remarkably prolonged at the normal temperature.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fresh-keeping technology, and particularly relates to a self-adjusting gas fresh-keeping bag. BACKGROUND

[0002] With the improvement of living standards, people's demand for food preservation is increasing. As a convenient food storage tool, fresh-keeping bags are widely used in the preservation and storage of various foods such as vegetables, fruits, cooked foods, etc. Traditional fresh-keeping bags are mostly made of polyethylene (PE), polypropylene (PP), polyvinyl chloride and other plastic materials, which can isolate air and moisture through physical sealing. However, there are obvious limitations in functionality and environmental protection. For example, when packaging fruits and vegetables, the fruits and vegetables will continue to respire and release water vapor. The low water vapor transmission rate of traditional fresh-keeping bags causes the water vapor to condense into water droplets inside the bag, which can easily breed bacteria and mold and accelerate the rotting of fruits and vegetables.

[0003] In recent years, some improved fresh-keeping bags have tried to add antibacterial agents or ethylene adsorbents to improve the preservation effect, but there is a risk of migration of chemical additives, which may pose a hidden danger to food safety. At the same time, although the multi-layer composite structure can enhance the barrier property, the too closed environment can cause the fruits and vegetables to perform anaerobic respiration and produce alcohol, which can also accelerate the rotting. Therefore, it is of great significance to develop a new type of fresh-keeping bag that can significantly prolong the preservation time of fruits and vegetables. SUMMARY

[0004] The utility model aims at providing a self-adjusting gas fresh-keeping bag to solve the problem of complex structure of existing fresh-keeping bags and limited preservation time of fresh foods such as fruits and vegetables.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A self-adjusting gas fresh-keeping bag, comprising a bag body and a sealing assembly; the bag body comprises an aluminized film outer bag and a water-absorbing and air-permeable layer compounded on the inner surface of the aluminized film outer bag; at least two air-permeable holes are provided on the aluminized film outer bag, and an air-permeable film is provided on the air-permeable holes, which completely covers the surface of the air-permeable holes in a sealed manner to regulate the oxygen intake in the bag body; the sealing assembly comprises a first cooperating part and a second cooperating part, which are respectively provided on both sides of the opening of the bag body to cooperate with each other to realize the sealing of the bag body.

[0007] In some specific embodiments, the material of the aluminized film outer bag is PET aluminized film.

[0008] In some specific embodiments, a CPP film is compounded between the aluminized film outer bag and the water-absorbing and air-permeable layer.

[0009] In some specific embodiments, each of the two opposite side surfaces of the aluminized film outer bag is provided with a gas-permeable hole, and each of the gas-permeable holes is provided with a gas-permeable film which completely covers the outer surface of the gas-permeable hole in a sealed manner.

[0010] In some specific embodiments, the area of the gas-permeable hole accounts for 0.5-2% of the area of the aluminized film outer bag.

[0011] In some specific embodiments, the number of holes of the gas-permeable film is 60-70 million holes per cm 2 .

[0012] In some specific embodiments, the gas-permeable film is provided with a waterproof and gas-permeable layer on both sides.

[0013] In some specific embodiments, the material of the waterproof and gas-permeable layer is water-repellent non-woven fabric.

[0014] In some specific embodiments, the material of the water-absorbing and gas-permeable layer is PP wood pulp non-woven fabric.

[0015] In some specific embodiments, the first fitting part is fixed to one side of the inner side of the bag opening through a first connecting strip, and the first connecting strip is provided with a clamping groove; the second fitting part is fixed to the other side of the inner side of the bag opening through a second connecting strip, and the second connecting strip is provided with a clamping strip; the clamping strip is embedded in the clamping groove to realize the sealing of the bag body.

[0016] Beneficial effects: the fruits and vegetables that need to be preserved are placed in the self-adjusting gas preservation bag provided by the utility model, the sealing of the preservation bag is realized through the action of the sealing assembly, at this time, the air outside the preservation bag can only enter the preservation bag through the gas-permeable film, which plays a role in adjusting and controlling the oxygen intake amount in the preservation bag body, so that the fruits and vegetables in the preservation bag are in a dormant state, the normal respiration of the fruits and vegetables is greatly reduced, and the preservation time of the fruits and vegetables at normal temperature can be significantly improved; the aluminized film outer bag as the main bag body can not only play a role in shading and reducing the photosynthesis of the fruits and vegetables in the preservation bag, but also block the moisture in the outside world from entering the preservation bag, and has a certain heat preservation effect, so that the influence of the temperature change in the outside world can be reduced, at the same time, the water-absorbing and gas-permeable layer on the inner surface of the aluminized film outer bag can not only make the air that permeates through the gas-permeable film smoothly enter the bag body, but also absorb the moisture generated by the fruits and vegetables, on the one hand, the moisture is prevented from condensing into water droplets and dripping onto the surface of the fruits and vegetables to cause mildew on the surface of the fruits and vegetables, and on the other hand, the humidity in the preservation bag can be maintained, which is beneficial to prolonging the freshness maintenance time of the fruits and vegetables. The self-adjusting gas preservation bag provided by the utility model has a simple structure, does not need additional preservation additives and tool equipment, and can significantly prolong the preservation time of fruits and vegetables at normal temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1It is the plane structure schematic view of the self-adjusting air fresh-keeping bag provided in an embodiment of the utility model.

[0018] Figure 2 Is Figure 1 A-A sectional view.

[0019] The drawings indicate that: 1, bag body, 2, sealing assembly, 11, aluminized film outer bag, 12, water-absorbing and air-permeable layer, 13, air-permeable hole, 14, air-permeable film, 15, waterproof and air-permeable layer, 21, first matching part, 211, first connecting strip, 212, clamping groove, 22, second matching part, 221, second connecting strip, 222, clamping strip. DETAILED DESCRIPTION

[0020] Although the present disclosure can be readily implemented in various forms of embodiments, only some of which are shown in the drawings and described in detail in the present specification, it is to be understood that the present specification is to be considered as an exemplification of the principles of the present disclosure and is not intended to limit the present disclosure to that as set forth herein.

[0021] Therefore, one feature indicated in the present specification will be used to explain one feature of one embodiment of the present disclosure, instead of implying that every embodiment of the present disclosure must have the explained feature. In addition, it should be noted that the present specification describes many features. Although certain features can be combined together to show possible system designs, these features can also be used in other combinations that are not explicitly explained. Therefore, unless otherwise stated, the explained combinations are not intended to be limiting.

[0022] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) are used to explain the structure and movement of various elements of the present disclosure, which are not absolute but relative. When the positions of these elements are changed, the indications of directions are also changed accordingly.

[0023] Please refer to Figure 1 And Figure 2 The self-adjusting air fresh-keeping bag provided by the utility model comprises a bag body 1 and a sealing assembly 2. The bag body 1 comprises an aluminized film outer bag 11 and a water-absorbing and air-permeable layer 12 compounded on the inner surface of the aluminized film outer bag 11. The aluminized film outer bag 11 is provided with at least two air-permeable holes 13, and the air-permeable holes 13 are provided with an air-permeable film 14. The air-permeable film 14 completely covers the surface of the air-permeable holes 13 in a sealed manner, and is used for regulating the oxygen intake amount in the bag body 1. The sealing assembly 2 comprises a first matching part 21 and a second matching part 22. The first matching part 21 and the second matching part 22 are arranged on both sides of the opening of the bag body 1 respectively, and are used for mutual cooperation to realize the sealing of the bag body 1.

[0024] When the fruit and vegetable needing preservation is put into the self-adjusting gas preservation bag, the sealing of the preservation bag is realized through the mutual cooperation of the first cooperation part 21 and the second cooperation part 22, and since the aluminized film outer bag 11 is airproof, the air outside the preservation bag can only enter the preservation bag through the air-permeable film 14, so that the oxygen intake amount in the self-adjusting gas preservation bag body 1 is adjusted and controlled, the fruit and vegetable in the preservation bag is in a dormant state, the normal respiration of the fruit and vegetable is greatly reduced, and the preservation time of the fruit and vegetable can be obviously prolonged at normal temperature. The aluminized film outer bag 11 as the main bag body 1 also has the effects of shading to reduce the photosynthesis of the fruit and vegetable in the preservation bag and blocking the moisture in the outside from entering the preservation bag. Meanwhile, the water absorption and air permeable layer 12 on the inner surface of the aluminized film outer bag 11 can absorb the moisture generated by the fruit and vegetable, so that the moisture is not condensed into water droplets and dripped onto the surface of the fruit and vegetable to cause the mildew of the surface of the fruit and vegetable, and the humidity in the preservation bag is maintained, which is beneficial to prolonging the freshness maintenance time of the fruit and vegetable.

[0025] In addition, based on similar principles, the self-adjusting gas preservation bag also has the effect of prolonging the preservation of the living fresh food such as crabs.

[0026] In the utility model, the water absorption and air permeable layer 12 can be compounded on the inner surface of the aluminized film outer bag 11 through the way of sticking or hot pressing, and the area of the compounded position can be partial or total. Preferably, the way of sticking is adopted for compounding.

[0027] In the utility model, the material of the aluminized film outer bag 11 is preferably PET aluminized film. Each of the opposite sides of the aluminized film outer bag 11 is provided with one air-permeable hole 13, and the air-permeable film 14 is arranged at each air-permeable hole 13 in a sealed way and completely covers the outer surface of the air-permeable hole 13. Since the fruit and vegetable is in a dormant state and also produces a certain amount of carbon dioxide through respiration, the air-permeable film 14 is arranged on the opposite sides of the aluminized film outer bag 11, which is more beneficial to keeping the air in the preservation bag circulating moderately, controlling the oxygen intake amount and also discharging the carbon dioxide, and reducing the influence of the high temperature in the bag or the anaerobic respiration on the freshness of the fruit and vegetable due to the accumulation of carbon dioxide.

[0028] In the utility model, the CPP film can be compounded between the aluminized film outer bag 11 and the water absorption and air permeable layer 12, and the CPP film has the effect of assisting the adhesion between the bag body 1 and the sealing assembly 2 and reducing the air leakage. The CPP film can be compounded between the aluminized film outer bag 11 and the water absorption and air permeable layer 12 through the way of sticking or hot pressing.

[0029] In the utility model, the air vent 13 can be circular, square or other shapes. The area of the air vent 13 is preferably 0.5-2% of the area of the aluminized film outer bag 11, such as 0.5%, 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2% or any value therebetween. Controlling the area of the air vent 13 within the above preferred range is more conducive to regulating the amount of air entering the fresh-keeping bag after installing the air-permeable film 14 at the air vent 13, achieving the purpose of regulating the oxygen intake in the fresh-keeping bag.

[0030] In the utility model, the number of holes of the air-permeable film 14 is preferably 60-70 million holes / cm 2 , such as 60, 62, 65, 68, 70 million holes / cm 2 . Controlling the number of holes of the air-permeable film 14 within the above preferred range is more conducive to regulating the oxygen intake in the fresh-keeping bag to put the fruits and vegetables in a dormant state, thereby improving the fresh-keeping time of the fruits and vegetables.

[0031] In the utility model, the air-permeable film 14 can be provided with a waterproof air-permeable layer 15 on both sides, which can prevent the water vapor outside and inside the fresh-keeping bag from blocking the air holes of the air-permeable film 14. The waterproof air-permeable layer 15 can be provided on both sides of the air-permeable film 14 by means of sticking. The material of the waterproof air-permeable layer 15 is preferably water-repellent non-woven fabric.

[0032] In the utility model, the material of the water-absorbing air-permeable layer 12 is preferably PP wood pulp non-woven fabric.

[0033] In the utility model, the bag body 1 can also include a bacteriostatic sheet, which is compounded on the surface of the water-absorbing air-permeable layer 12 away from the aluminized film outer bag 11. The bacteriostatic sheet can be compounded on the surface of the water-absorbing air-permeable layer 12 by means of sticking or hot pressing. At this time, the fresh-keeping bag can inhibit the growth of bacteria in a humid environment, not only can prolong the fresh-keeping time of fresh fruits and vegetables, but also can delay or inhibit the rotting trend of fruits and vegetables that have been mildewed.

[0034] In the utility model, referring to Figure 2 , the first matching part 21 is fixed to one side of the inside of the opening of the bag body 1 through the first connecting strip 211, and the first connecting strip 211 is provided with a clamping groove 212; the second matching part 22 is fixed to the other side of the inside of the opening of the bag body 1 through the second connecting strip 221, and the second connecting strip 221 is provided with a clamping strip 222; the clamping strip 222 is embedded in the clamping groove 212 to realize the sealing of the bag body 1. The first connecting strip 211 or the second connecting strip 221 can be fixed to the inside of the opening of the bag body 1 by means of sticking or hot pressing. The first connecting strip 211 and the clamping groove 212 can be integrally formed. The second connecting strip 221 and the clamping strip 222 can be integrally formed.

[0035] In addition, the sealing assembly 2 can be other existing sealing structures 2, such as a zipper type, a suction cup type, etc. in addition to the snap type sealing structure 2 mentioned above.

[0036] The utility model will be described in detail through specific embodiments. The examples of the embodiments are intended to explain the utility model and cannot be understood as a limitation of the utility model. The specific technology or conditions not mentioned in the embodiments are carried out according to the technology or conditions described in the literature in the field or according to the product manual. The reagents or instruments not mentioned by the manufacturer are all conventional products that can be obtained in the market.

[0037] Embodiment 1

[0038] This embodiment is used to illustrate a self-adjusting air fresh-keeping bag provided by the utility model, as shown in Figure 1 and Figure 2 It comprises a bag body 1 and a sealing assembly 2.

[0039] The bag body 1 comprises an aluminized film outer bag 11 and a water-absorbing and air-permeable layer 12 which is compounded on the inner surface of the aluminized film outer bag 11 by pasting. The size of the aluminized film outer bag 11 is 270mm*195mm*280mm, and the material of the aluminized film outer bag 11 is PET aluminized film. The size of the water-absorbing and air-permeable layer 12 is 450mm*185mm*265mm, and the material of the water-absorbing and air-permeable layer 12 is PP wood pulp non-woven fabric. There is one air-permeable hole 13 on each of the two opposite surfaces of the aluminized film outer bag 11, and the diameter of the air-permeable hole 13 is 45mm. The two surfaces of the air-permeable film 14 are pasted with a waterproof and air-permeable layer 15 to form an air-permeable film 14 label with a size of 80mm*80mm, which is pasted on the air-permeable hole 13 in a sealed manner. The number of holes of the air-permeable film 14 is 60 million holes / cm 2 , and the material of the waterproof and air-permeable layer 15 is water-repellent non-woven fabric.

[0040] The sealing assembly 2 comprises a first matching part 21 and a second matching part 22. The first matching part 21 is pasted on one side of the inner side of the opening of the bag body 1 through a first connecting strip 211, and a clamping groove 212 is arranged on the first connecting strip 211. The second matching part 22 is pasted on the other side of the inner side of the opening of the bag body 1 through a second connecting strip 221, and a clamping strip 222 is arranged on the second connecting strip 221. The clamping strip 222 is embedded in the clamping groove 212 to realize the sealing of the bag body 1.

[0041] Embodiment 2

[0042] This embodiment is used to illustrate a self-adjusting air fresh-keeping bag provided by the utility model, as shown in Figure 1 and Figure 2 It comprises a bag body 1 and a sealing assembly 2.

[0043] The bag body 1 comprises an aluminized film outer bag 11 and a water-absorbing and air-permeable layer 12 which is compounded on the inner surface of the aluminized film outer bag 11 by means of adhesion. The aluminized film outer bag 11 has a size of 470mm*195mm*280mm, and the material of the aluminized film outer bag 11 is PET aluminized film. The water-absorbing and air-permeable layer 12 has a size of 450mm*185mm*265mm, and the material of the water-absorbing and air-permeable layer 12 is PP wood pulp non-woven fabric. The aluminized film outer bag 11 is provided with an air-permeable hole 13 on each of the opposite surfaces, and the diameter of the air-permeable hole 13 is 45mm. The air-permeable film 14 is provided with a waterproof and air-permeable layer 15 on each of the surfaces, and the air-permeable film 14 label with a size of 80mm*80mm is formed and adhered to the air-permeable hole 13 in a sealed manner. The air-permeable film 14 has a hole number of 70 million holes / cm 2 , and the material of the waterproof and air-permeable layer 15 is water-repellent non-woven fabric.

[0044] The sealing assembly 2 comprises a first fitting part 21 and a second fitting part 22. The first fitting part 21 is adhered to one side of the inner side of the opening of the bag body 1 through a first connecting strip 211, and the first connecting strip 211 is provided with a clamping groove 212. The second fitting part 22 is adhered to the other side of the inner side of the opening of the bag body 1 through a second connecting strip 221, and the second connecting strip 221 is provided with a clamping strip 222. The clamping strip 222 is embedded in the clamping groove 212 to realize the sealing of the bag body 1.

[0045] Test Example

[0046] The test example is used to illustrate the preservation effect of the self-adjusting air fresh-keeping bag provided in the above embodiments on fruits and vegetables.

[0047] 1. The same number and size of carambolas were respectively placed in the self-adjusting air fresh-keeping bags provided in Example 1 and Example 2, and were placed at room temperature for 12 days after being sealed. The carambolas in Example 1 and Example 2 were not rotten or dry, and maintained about 85% of the freshness before being placed.

[0048] 2. The same number and size of peppers were respectively placed in the self-adjusting air fresh-keeping bags provided in Example 1 and Example 2, and were placed in the conventional fresh-keeping bag (commonly sold on the market, similar in size to the examples) provided in Comparative Example 1, and were placed at room temperature for 12 days after being sealed. The peppers in Example 1 and Example 2 were not rotten or dry, and maintained about 90% of the freshness before being placed. However, the peppers in Comparative Example 1 were rotten, 30% of the peppers turned red, and 50% of the peppers turned yellow.

[0049] 3. The same number and size of eggplants were respectively placed in the self-adjusting air fresh-keeping bags provided in Example 1 and Example 2, and were placed at room temperature for 12 days after being sealed. The eggplants were not rotten or dry, and maintained about 95% of the freshness before being placed, and were difficult to distinguish from the freshly picked eggplants when they were placed together.

[0050] 4. The same number, size similar crabs are respectively put into the self-regulating gas preservation bags provided by example 1 and example 2, and after being sealed, they are placed at normal temperature for 7 days, and after 7 days, the crabs are still very active.

[0051] Through the above test results, compared with the existing preservation bags, without additional tools and equipment and additives, the self-regulating gas preservation bag can significantly prolong the preservation time of fruits and vegetables and similar crabs and other fresh foods at normal temperature.

[0052] Although the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terms used are terms of description and illustration and not of limitation. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics thereof, it is understood that the above-described embodiments are not limited to any of the aforementioned details but are to be construed broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A self-regulating gas fresh-keeping bag, characterized in that, The bag comprises a bag body and a sealing assembly; the bag body comprises an aluminized film outer bag and a water-absorbing and air-permeable layer combined with the inner surface of the aluminized film outer bag; the aluminized film outer bag is provided with at least two air-permeable holes, and the air-permeable holes are provided with air-permeable films which completely cover the surfaces of the air-permeable holes in a sealed manner to regulate the oxygen intake in the bag body; the sealing assembly comprises a first fitting part and a second fitting part, and the first fitting part and the second fitting part are respectively arranged on the two sides of the opening of the bag body to be matched with each other to realize the sealing of the bag body.

2. The self-regulating gas fresh-keeping bag according to claim 1, characterized in that, The material of the aluminized film outer bag is PET aluminized film.

3. The self-regulating gas fresh-keeping bag according to claim 1, characterized in that, The aluminized film outer bag and the water-absorbing and air-permeable layer are combined with a CPP film.

4. The self-regulating gas fresh-keeping bag according to claim 1, characterized in that, Each of the opposite surfaces of the aluminized film outer bag is provided with an air-permeable hole, and each of the air-permeable holes is provided with an air-permeable film which completely covers the outer surface of the air-permeable hole in a sealed manner.

5. The self-regulating gas fresh-keeping bag according to claim 4, characterized in that, The area of the air-permeable hole accounts for 0.5-2% of the area of the aluminized film outer bag.

6. The self-tightening fresh-keeping bag according to claim 1, wherein, The air permeable film has a number of pores of 60 to 70 million pores / cm 2 .

7. The self-tightening fresh-keeping bag according to claim 1, characterized in that, The air-permeable film is provided with water-proof and air-permeable layers on both sides.

8. The self-tightening fresh-keeping bag according to claim 7, characterized in that, The material of the water-proof and air-permeable layer is water-repellent non-woven fabric.

9. The self-tightening fresh-keeping bag according to claim 1, characterized in that, The material of the water-absorbing and air-permeable layer is PP wood pulp non-woven fabric.

10. The self-tightening fresh-keeping bag according to claim 1, characterized in that, The first fitting part is fixed to one side of the inner side of the opening of the bag body through a first connecting strip, and the first connecting strip is provided with a clamping groove; the second fitting part is fixed to the other side of the inner side of the opening of the bag body through a second connecting strip, and the second connecting strip is provided with a clamping strip; the clamping strip is embedded in the clamping groove to realize the sealing of the bag body.

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