One-way valve type packaging bag

Abstract

The utility model discloses a one-way valve type packaging bag which comprises a bag body and a one-way valve. The bag body is provided with a containing cavity, and the one-way valve is arranged on the bag body and enables the containing cavity to be communicated with the outside in a one-way mode. The bag body comprises an inner bag and an outer bag; the inner bag is a waterproof breathable adhesive film, and the containing cavity is defined by the inner bag; the outer bag is an airtight adhesive film and is coated outside the inner bag; the one-way valve comprises a base plate, a valve element body, an elastic waterproof breathable film and a protective cover. The structure of the one-way valve is improved, the one-way valve is composed of the base plate, the valve element body, the elastic waterproof breathable film and the protective cover, the elastic waterproof breathable film can promote the valve element body to move inwards to block the containing hole on one hand, the elastic waterproof breathable film can prevent water vapor from entering the containing hole on the other hand, and meanwhile the inner bag is matched with the waterproof breathable adhesive film. Therefore, double waterproof ventilation is achieved, water vapor is effectively prevented from entering the containing cavity, articles are prevented from being affected with damp, and convenience is brought to use.

Description

Technical Field

[0001] The utility model relates to the field of packaging bags, in particular to a one-way valve type packaging bag. Background Art

[0002] Plastic packaging bags are made of plastic and used to produce a variety of daily necessities. They are widely used in daily life and industrial production, but this temporary convenience can bring long-term harm. Commonly used plastic packaging bags are mostly made of polyethylene film, which is non-toxic and can be used to store food. Another type of film is made of polyvinyl chloride. PVC itself is also non-toxic, but the additives added to the film depending on its application are often harmful to the human body and have certain toxicity. Therefore, these films and plastic bags made from them are not suitable for storing food. Plastic packaging bags can be divided into OPP, CPP, PP, PE, PVA, EVA, composite bags, co-extruded bags, etc.

[0003] To allow for degassing of packaging bags, some current packaging bags are equipped with a one-way valve. This valve allows the accommodating cavity within the packaging bag to communicate with the outside world in one direction. However, once the one-way valve is opened, moisture from the outside can easily enter the accommodating cavity, causing moisture in the accommodating cavity and causing inconvenience in use. Therefore, it is necessary to improve current packaging bags. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a one-way valve packaging bag, which can effectively solve the problem that the existing packaging bags with one-way valves easily allow external water vapor to enter the accommodating cavity, causing the items in the accommodating cavity to become damp.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A one-way valve packaging bag comprises a bag body and a one-way valve; the bag body has a accommodating cavity, the one-way valve is arranged on the bag body, and the one-way valve enables the accommodating cavity to be connected to the outside in one direction; the bag body comprises an inner bag and an outer bag; the inner bag is a waterproof and breathable film, and the inner bag surrounds and forms the aforementioned accommodating cavity; the outer bag is an airtight film, and the outer bag is covered with an outer layer of the inner bag; the one-way valve comprises a base plate, a valve core, an elastic waterproof and breathable film, and a protective cover; the base plate is made of hard plastic material, and the base plate is fixed to the outer bag by hot melt. The inner and outer side surfaces of the substrate are penetrated by a receiving hole, which communicates between the outer side of the inner bag and the outer side of the outer bag, and the inner diameter of the receiving hole gradually increases from the inside to the outside; the valve core body is adapted to the receiving hole and can be arranged in the receiving hole so as to be movable inward and outward; the elastic waterproof and breathable film is fitted and fixed on the outer side surface of the substrate and prompts the valve core body to keep moving inward to block the receiving hole; the protective cover is made of a hard material, is fixed on the substrate and covers the elastic waterproof and breathable film, and a plurality of air holes are penetrated by the inner and outer side surfaces of the protective cover.

[0007] As a preferred solution, a hollow chamber is formed between the inner bag and the outer bag, and a plurality of cushioning airbags are provided in the hollow chamber to protect the items in the accommodating cavity and prevent the items from being easily crushed.

[0008] As a preferred solution, the multiple cushioning airbags are all bonded and fixed between the outer wall of the inner bag and the inner wall of the outer bag, which has a simple structure and is easy to manufacture.

[0009] As a preferred solution, the opening of the accommodating cavity faces upward, and a first sealing strip is hot-melt fixed between the top of one side of the inner bag and the inner wall of one side of the outer bag, and a second sealing strip is hot-melt fixed between the top of the other side of the inner bag and the inner wall of the other side of the outer bag. The second sealing strip and the first sealing strip are detachably sealed to seal the opening of the accommodating cavity, which is convenient for resealing after opening.

[0010] As a preferred solution, a dovetail groove is concavely provided on the inner side of the first sealing strip, and a dovetail block is convexly provided on the inner side of the second sealing strip. The dovetail block and the dovetail groove are clamped and sealed, with a simple structure, easy assembly and disassembly, and a stable connection.

[0011] As a preferred solution, the top of one side of the outer bag has a first tearable sealing sheet, which is located above the first sealing strip, and the top of the other side of the outer bag has a second tearable sealing sheet, which is located above the second sealing strip. In the closed state, the second tearable sealing sheet overlaps with the first tearable sealing sheet and is hot-melt fixed together to achieve a better sealing packaging effect.

[0012] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0013] By improving the one-way valve structure, the one-way valve is composed of a base plate, a valve core body, an elastic waterproof and breathable film and a protective cover. The elastic waterproof and breathable film can, on the one hand, prompt the valve core body to keep moving inward to block the accommodating hole, and on the other hand, the elastic waterproof and breathable film can prevent water vapor from entering. At the same time, the inner bag adopts a waterproof and breathable rubber film to achieve double waterproof and breathable properties, so as to more effectively prevent water vapor from entering the accommodating cavity, prevent items from getting damp, and bring convenience to use.

[0014] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of a preferred embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 A magnified schematic diagram of position A in the middle;

[0017] Figure 3 yes Figure 2 Diagram of the open state.

[0018] Description of the accompanying drawings:

[0019] 10. Bag body 11. Inner bag

[0020] 12. Outer bag 121. First tearable sealing sheet

[0021] 122, second tearable sealing sheet 13, cushioning airbag

[0022] 14. First sealing strip 141, dovetail groove

[0023] 15. Second sealing strip 151. Dovetail block

[0024] 101, accommodating chamber 102, hollow chamber

[0025] 20. One-way valve 21. Base plate

[0026] 22. Valve core 23. Elastic waterproof and breathable film

[0027] 24. Protective cover 201, receiving hole

[0028] 202. Stomata. DETAILED DESCRIPTION

[0029] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the present utility model, including a bag body 10 and a one-way valve 20.

[0030] The bag body 10 has a storage cavity 101, which includes an inner bag 11 and an outer bag 12. The inner bag 11 is a waterproof, breathable film that surrounds the aforementioned storage cavity 101 and is used to store items. The outer bag 12 is an airtight film that covers the outer surface of the inner bag 11. In this embodiment, a hollow chamber 102 is formed between the inner bag 11 and the outer bag 12. Multiple cushioning airbags 13 are provided in the hollow chamber 102 to protect the items in the storage cavity 101 and prevent them from being easily crushed. In addition, the multiple cushioning airbags 13 are adhesively fixed between the outer wall of the inner bag 11 and the inner wall of the outer bag 12, resulting in a simple structure and easy production. In addition, the opening of the accommodating cavity 101 faces upward, and a first sealing strip 14 is hot-melt-fixed between the top of one side of the inner bag 11 and the inner wall of one side of the outer bag 12. A second sealing strip 15 is hot-melt-fixed between the top of the other side of the inner bag 11 and the inner wall of the other side of the outer bag 12. The second sealing strip 15 and the first sealing strip 14 are removably sealed to seal the opening of the accommodating cavity 101, facilitating resealing after opening. Furthermore, a dovetail groove 141 is concavely provided on the inner side of the first sealing strip 14, and a dovetail block 151 is convexly provided on the inner side of the second sealing strip 15. The dovetail block 151 and the dovetail groove 141 are locked and sealed, resulting in a simple structure, easy assembly and disassembly, and a stable connection. In addition, a first tearable sealing sheet 121 is provided at the top of one side of the outer bag 12, and the first tearable sealing sheet 121 is located above the first sealing strip 14. A second tearable sealing sheet 122 is provided at the top of the other side of the outer bag 12, and the second tearable sealing sheet 122 is located above the second sealing strip 15. In the closed state, the second tearable sealing sheet 122 overlaps with the first tearable sealing sheet 121 and is hot-melt fixed together to achieve a better sealing packaging effect.

[0031] The one-way valve 20 is provided on the bag body 10, and the one-way valve 20 enables the accommodating chamber 101 to be connected to the outside in one direction; specifically, the one-way valve 20 includes a base plate 21, a valve core body 22, an elastic waterproof and breathable film 23 and a protective cover 24; the base plate 21 is made of hard plastic material, and the base plate 21 is fixed to the outer bag 12 by hot melt, and an accommodating hole 201 is formed through the inner and outer sides of the base plate 21, and the accommodating hole 201 communicates between the outer side of the inner bag 11 and the outer side of the outer bag 12. 01 gradually increases in inner diameter from the inside out; the valve core 22 is adapted to the receiving hole 201 and is disposed in the receiving hole 201 so as to be movable inward and outward; the elastic waterproof and breathable film 23 is affixed to the outer side of the base plate 21 and forces the valve core 22 to remain movable inward, thereby blocking the receiving hole 201; the protective cover 24 is made of a hard material and is fixed to the base plate 21 and covers the elastic waterproof and breathable film 23. A plurality of air holes 202 are formed through the inner and outer sides of the protective cover 24. In this embodiment, there are multiple receiving holes 201, each of which is provided with a valve core 22. The elastic waterproof and breathable film 23 forces each valve core 22 to remain movable inward, thereby blocking each receiving hole 201.

[0032] The method of using this embodiment is described in detail as follows:

[0033] When packaging items (such as tea, food or spices), first, the items are placed into the accommodating cavity 101 from the opening of the accommodating cavity 101, then the second sealing strip 15 and the first sealing strip 14 are sealed closed, and then the second tearable sealing sheet 122 and the first tearable sealing sheet 121 are overlapped and fixed together by hot melt.

[0034] When the item is unopened in this product, the user can press the product or put the nose close to the protective cover 24 to inhale, so that the valve core body 22 moves outward, the elastic waterproof breathable film 23 is deformed, and the accommodating hole 201 is opened, so that the gas in the accommodating cavity 101 is discharged from the accommodating hole 201. The user can smell the odor of the item by putting the nose close to the protective cover 24 to determine what kind of item it is. When the pressure stops or the nose is no longer close to the protective cover 24 to inhale, the elastic waterproof breathable film 23 resumes its deformation, so as to prompt the valve core body 22 to move inward and re-block the accommodating hole 101, preventing gas and water vapor from entering the accommodating cavity 101, thereby achieving the purpose of moisture-proofing.

[0035] When an item needs to be used, the second tearable sealing sheet 122 and the first tearable sealing sheet 121 can be torn off and removed, and then the second sealing strip 15 and the first sealing strip 14 can be separated by force. At this time, the opening of the accommodating cavity 101 is opened, and the items in the accommodating cavity 101 can be taken out. After taking out the items, the second sealing strip 15 and the first sealing strip 14 can be sealed again to prevent the items from getting damp.

[0036] The design focus of the utility model is that: by improving the one-way valve structure, the one-way valve is composed of a base plate, a valve core body, an elastic waterproof and breathable film and a protective cover. The elastic waterproof and breathable film can, on the one hand, prompt the valve core body to keep moving inward to block the accommodating hole, and on the other hand, the elastic waterproof and breathable film can prevent water vapor from entering. At the same time, the inner bag adopts a waterproof and breathable film to achieve double waterproof and breathable properties, so as to more effectively prevent water vapor from entering the accommodating cavity, prevent articles from getting damp, and bring convenience to use.

[0037] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A one-way valve packaging bag comprising a bag body and a one-way valve; the bag body having a receiving cavity, the one-way valve being disposed on the bag body, the one-way valve causing the receiving cavity to be in one-way communication with the outside world; characterized in that: The bag body includes an inner bag and an outer bag; the inner bag is a waterproof and breathable film, and the inner bag is constructed to form the aforementioned accommodating cavity; the outer bag is an airtight film, and the outer bag is covered on the outside of the inner bag; the one-way valve includes a substrate, a valve core body, an elastic waterproof and breathable film and a protective cover; the substrate is made of hard plastic material, and the substrate is hot-melt fixed to the outer bag, and an accommodating hole is formed through the inner and outer sides of the substrate, and the accommodating hole connects the outer side of the inner bag and the outer side of the outer bag, and the inner diameter of the accommodating hole gradually increases from the inside to the outside; the valve core body is adapted to the accommodating hole and can be movably arranged in the accommodating hole inward and outward; the elastic waterproof and breathable film is fitted and fixed to the outer side of the substrate and prompts the valve core body to keep moving inward and block the accommodating hole; the protective cover is made of hard material, and the protective cover is fixed on the substrate and covers the elastic waterproof and breathable film, and a plurality of air holes are formed through the inner and outer sides of the protective cover.

2. The one-way valve packaging bag according to claim 1, characterized in that: A hollow chamber is formed between the inner bag and the outer bag, and a plurality of cushioning airbags are arranged in the hollow chamber.

3. The one-way valve packaging bag according to claim 2, characterized in that: The plurality of cushioning airbags are all bonded and fixed between the outer wall of the inner bag and the inner wall of the outer bag.

4. The one-way valve packaging bag according to claim 1, characterized in that: The opening of the accommodating cavity faces upward, and a first sealing strip is hot-melt fixed between the top of one side of the inner bag and the inner wall of one side of the outer bag, and a second sealing strip is hot-melt fixed between the top of the other side of the inner bag and the inner wall of the other side of the outer bag. The second sealing strip and the first sealing strip are detachably sealed to seal the opening of the accommodating cavity.

5. The one-way valve packaging bag according to claim 4, characterized in that: A dovetail groove is concavely provided on the inner side of the first sealing strip, and a dovetail block is convexly provided on the inner side of the second sealing strip. The dovetail block is clamped and sealed in the dovetail groove.

6. The one-way valve packaging bag according to claim 4, characterized in that: The top of one side of the outer bag is provided with a first tearable sealing sheet, which is located above the first sealing strip. The top of the other side of the outer bag is provided with a second tearable sealing sheet, which is located above the second sealing strip. In the closed state, the second tearable sealing sheet overlaps with the first tearable sealing sheet and is fixed together by hot melt.

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