CN205327812U - Nitrogen oxygen circulation freshness protection package - Google Patents

Abstract

A nitrogen-oxygen cycle fresh-keeping bag, comprising a fresh-keeping bag main body and a one-way exhaust valve, the one-way exhaust valve being arranged through the side wall of the fresh-keeping bag main body; an opening is provided on the edge of the fresh-keeping bag main body and a sealing portion, the inside of the sealing portion is sandwiched with a curved strip-shaped air intake channel that runs through the width of the sealing portion, one end of the air intake channel is provided with a first opening that communicates with the external environment, and the air intake channel The other end is provided with a second opening communicating with the inner cavity of the main body of the fresh-keeping bag, and the width of the air inlet channel gradually becomes smaller from the outside to the inside. The nitrogen-oxygen cycle fresh-keeping bag has a simple structure, strong gas storage capacity, and is not easy to be damaged, and the gas in the bag can be renewed as required, so as to ensure that seafood or fruit and vegetable products are kept fresh, clean and safe during long-distance transportation.

Description

A nitrogen-oxygen cycle fresh-keeping bag

technical field

The utility model belongs to the technical field of seafood, fruit and vegetable packaging, in particular to a nitrogen-oxygen cycle fresh-keeping bag.

Background technique

During the long-distance transportation, fresh and live seafood is very easy to die in large numbers due to lack of oxygen, pollution and other reasons, thus losing its original economic value. During transportation, it is often necessary to carry a large amount of oxygen supply and power supply equipment to provide the conditions required for the survival of fresh and live seafood. The living environment of the product causes pollution, which leads to a large number of fish kills. Similarly, during the long-distance transportation of fruit and vegetable products, the fruit and vegetable products undergo continuous aerobic respiration, and are prone to ripening, aging and yellowing in a short period of time. Keeping the freshness of the transported products and reducing the loss during long-distance transportation are very important to avoid economic losses during transportation.

Chinese patent document CN103947600A discloses a transport oxygen bag for fresh and live fish. The transport oxygen bag for fresh and live fish is a bag with an opening on one side and a peripheral seal formed by an upper layer and a lower layer. The belt seals the mouth of the bag to prolong the survival time of the fish. But the opening of the transport oxygen bag is relatively large. When injecting oxygen and binding the mouth of the bag after injecting oxygen, air is easily mixed into the oxygen bag, reducing the amount of oxygen in the bag, thereby reducing the survival time of fish, and the oxygen bag The upper layer and the lower layer of the bag are simply sealed by bonding, the peel strength of the bonding part is low, the bag body structure is poor in stability during transportation, and it is easy to be damaged; in addition, it is inconvenient to use a separate strapping strap, which reduces packaging efficiency.

Chinese patent document CN101348181A discloses a modified atmosphere fresh-keeping bag. The bag body of the modified atmosphere fresh-keeping bag is composed of a modified atmosphere fresh-keeping film, a breathable hydrophilic material layer, and a breathable hydrophobic material layer from the outer layer to the inner layer. The modified atmosphere fresh-keeping bag can maintain the concentration of oxygen and carbon dioxide in the bag space at an equilibrium concentration, so as to reduce the respiratory metabolism activity of fresh fruits and vegetables, thereby playing a fresh-keeping role. However, the modified atmosphere fresh-keeping bag is made of a special material with a microscopic gap structure, the bag body structure is complicated, the production operation is cumbersome, and the use cost is too high.

Utility model content

In order to solve the above-mentioned problems in the prior art, the utility model provides a nitrogen-oxygen circulation fresh-keeping bag and its manufacturing and using methods. The nitrogen-oxygen cycle fresh-keeping bag has a simple structure and strong gas storage capacity, and can directionally update the gas in the bag according to needs; in addition, the nitrogen-oxygen cycle fresh-keeping bag can also isolate seafood or fruit and vegetable products from the external environment to prevent pollution. It is easy to carry and use, and can ensure that seafood or fruit and vegetable products remain fresh, clean and safe during long-distance transportation.

The technical scheme adopted in the utility model is:

A nitrogen-oxygen cycle fresh-keeping bag, comprising a fresh-keeping bag main body and a one-way exhaust valve, and the one-way exhaust valve is arranged through the side wall of the fresh-keeping bag main body;

The edge of the main body of the fresh-keeping bag is provided with an opening and a sealing part, and inside the sealing part is a curved strip-shaped air intake channel that runs through the width of the sealing part. One end of the air intake channel is provided with a The other end of the air intake channel is provided with a second opening communicating with the inner cavity of the main body of the fresh-keeping bag, and the width of the air intake channel gradually decreases from the outside to the inside.

The curved strip-shaped air intake passage is an s-shaped or reverse-s-shaped passage; the width of the first opening is 5.5-9.5mm, and the width of the second opening is 1mm-2.5mm; the sealing part is The sealing structure is equal in width, and the width of the sealing part is 15-25mm.

The one-way exhaust valve includes an air outlet plastic hose, a first fixing part, a one-way ventilation part and a second fixing part in order from the outside to the inside of the side wall of the fresh-keeping bag main body; the one-way ventilation part is Hollow tubular structure, the outer surface of the side wall of the one-way ventilation part is provided with a fixed clamping plate, the lower surface of the fixed clamping plate is set close to the outer surface of the side wall of the main body of the fresh-keeping bag, and the tubular structure is located on the The part of the lower end of the fixing clip penetrates through the side wall of the main body of the fresh-keeping bag and is connected and fixed with the second fixing part. The inner wall of the upper end of the tubular structure is provided with a circle of small blades along the horizontal direction. The central axis of the tubular structure converges and slightly protrudes toward the upper end of the tubular structure.

The tubular structure is connected and fixed to the first fixing part and the second fixing part through threads, and a first elastic sealing ring is arranged between the first fixing part and the plastic hose of the air outlet, and the fixing clip A second elastic sealing ring is provided between the plate and the outer surface of the side wall of the main body of the fresh-keeping bag, and a third elastic sealing ring is provided between the second fixing part and the inner surface of the side wall of the main body of the fresh-keeping bag.

A handle is also provided on the sealing part.

The main body of the fresh-keeping bag is made of a composite film material, and the composite film material sequentially includes a biaxially stretched nylon film layer, an adhesive layer and a low-density polyethylene film layer from the outside to the inside.

The thickness of the biaxially stretched nylon film layer is 1.3-1.8 μm, and the biaxial tensile strength is ≥ 180 MPa; the thickness of the low-density polyethylene film layer is 15-20 μm, and the biaxial tensile strength is ≥ 10 MPa; the bonding layer It is a polyurethane adhesive layer uniformly coated between the biaxially stretched nylon film layer and the low-density polyethylene film layer; the composite film material is used to manufacture the nitrogen-oxygen circulation fresh-keeping bag after aging treatment.

The beneficial effects of the utility model are:

1. The nitrogen-oxygen cycle fresh-keeping bag is provided with a curved strip-shaped air intake channel, and the air intake channel gradually narrows from the outside to the inside. When the nitrogen-oxygen cycle fresh-keeping bag is filled with oxygen, the bag body expands and the bag body expands. The edge of the bag is deformed, and the deformed edge of the bag squeezes and closes the second opening with a small width, and closes the air inlet channel, thereby sealing the nitrogen-oxygen cycle fresh-keeping bag; the inside of the nitrogen-oxygen cycle fresh-keeping bag It can store a large amount of oxygen or nitrogen at a higher concentration, and has high gas storage efficiency, which can increase the survival time of seafood in the bag or the preservation time of fruits and vegetables. When using the nitrogen-oxygen cycle fresh-keeping bag, there is no need to carry bulky oxygen supply, nitrogen supply and power supply equipment, which saves transportation space and transportation costs, and facilitates long-distance fresh transportation.

2. The nitrogen-oxygen cycle fresh-keeping bag is equipped with a one-way exhaust valve, and the gas can only flow from the inside of the bag to the outside of the bag. When the gas in the bag needs to be replaced, remove the plastic hose clamped at the outlet of the gas outlet. The clip, the gas is discharged from the one-way exhaust valve, and then the clip is clamped at the outlet of the plastic hose at the gas outlet, and nitrogen or oxygen is filled through the air inlet channel until the bag body is fully expanded to realize the inside of the bag. Gas one-way flow update. The setting of the one-way exhaust valve prevents the air outside the bag from entering the bag through the one-way exhaust valve, ensuring that the gas in the bag has a higher purity.

3. The sealing part of the nitrogen-oxygen circulation fresh-keeping bag is also provided with a handle, so that the nitrogen-oxygen circulation fresh-keeping bag is easy to carry and carry, and has a high degree of comfort.

4. The nitrogen-oxygen circulation fresh-keeping bag is made of a composite membrane material. The composite membrane material has undergone aging reaction treatment, and the interlayer peeling strength is high. During use, material delamination will not occur. All composite membrane materials The above-mentioned fish transport bag has excellent low air permeability, the bag body has good puncture resistance and impact resistance, is not easy to be damaged during transportation and use, and has good stability. The outward side of the composite film material is a biaxially stretched nylon film layer, and patterns, patterns or other marks can be printed on the biaxially stretched nylon film layer as required, so as to beautify the appearance of the nitrogen-oxygen cycle fresh-keeping bag conveniently. And can play a certain role in advertising.

Description of drawings

Fig. 1 is the structural representation of described nitrogen-oxygen circulation fresh-keeping bag;

Fig. 2 is the structural representation of described composite film material;

Fig. 3 is the structural representation of described one-way exhaust valve;

Fig. 4 is a top view of the leaflet structure.

In the figure: 1. Main body of fresh-keeping bag; 2. Opening edge; 3. Plastic hose at air outlet; 4. Curved strip-shaped air intake channel; 5. One-way exhaust valve; 6. Handle handle; 7. Two-way stretched nylon Film layer; 8. Adhesive layer; 9. Low-density polyethylene film layer; 10. First fixing part; 11. First opening; 12. Second opening; 13. One-way ventilation part; 14. Second fixing part ; 15, small blade; 16, fixed clamping plate; 17, the first elastic sealing ring; 18, the second elastic sealing ring; 19, the third elastic sealing ring.

detailed description

The following specific embodiments can describe the utility model in more detail, but do not limit the utility model in any form.

As shown in Figure 1, the utility model provides a nitrogen-oxygen circulation fresh-keeping bag. A nitrogen-oxygen cycle fresh-keeping bag, comprising a fresh-keeping bag main body 1 and a one-way exhaust valve 5 , the one-way exhaust valve 5 is arranged through the side wall of the fresh-keeping bag main body 1 .

The edge of the fresh-keeping bag main body 1 is provided with an opening 2 and a sealing portion, and inside the sealing portion is a curved strip-shaped air intake passage 4 that runs through the width of the sealing portion, and one end of the air intake passage 4 is provided with a The first opening 11 communicating with the external environment, the other end of the air intake channel 4 is provided with a second opening 12 communicating with the inner cavity of the fresh-keeping bag main body 1, the width of the air intake channel 4 is from the outside to The inner side gradually becomes smaller; it should be noted that the outer here and later refers to the direction pointing to the outside of the fresh-keeping bag main body 1, and the inner refers to the direction pointing to the inner cavity of the fresh-keeping bag main body 1. Further, the curved strip-shaped air intake channel 4 is an s-shaped or reverse s-shaped channel; the width of the first opening 11 is 5.5-9.5 mm, and the width of the second opening 12 is 1 mm-2.5 mm; The sealing part is a sealing structure with equal width everywhere, and the width of the sealing part is 15-25 mm.

The one-way exhaust valve 5 is disposed through the side wall of the fresh-keeping bag main body 1 . As shown in FIG. 3 , the one-way exhaust valve 5 includes an air outlet plastic hose 3, a first fixing part 10, a one-way ventilation part 13 and a first Two fixed parts 14; the one-way ventilation part 13 is a hollow tubular structure, the outer surface of the side wall of the one-way ventilation part 13 is provided with a fixed clamping plate 16, and the lower surface of the fixed clamping plate 16 is close to the fresh-keeping bag The outer surface of the side wall of the main body 1 is arranged, and the part of the tubular structure located at the lower end of the fixing clamp 16 passes through the side wall of the fresh-keeping bag main body 1 and is connected and fixed with the second fixing part 14. The inner wall of the upper end of the structure is provided with a circle of small blades 15 along the horizontal direction, and the tops of the small blades 15 converge at the central axis of the tubular structure and slightly protrude toward the upper end of the tubular structure (see Figures 3 and 4); When the air pressure in the bag increases, the gas in the bag pushes the small blades 15 from the inside to the outside, and opens the gap between the small blades 15, so that the gas flows out of the bag; Squeeze the small blades 15 from the outside to the inside to close the gaps between the small blades 15, so that the gas cannot enter the bag and ensure that the gas in the bag has a higher purity.

Further, the tubular structure is connected and fixed to the first fixing part 10 and the second fixing part 14 through threads; a first elastic spring is provided between the first fixing part 10 and the air outlet plastic hose 3 A sealing ring 17, a second elastic sealing ring 18 is arranged between the fixed clamping plate 16 and the side wall outer surface of the fresh-keeping bag main body (1), and the second fixing part 14 and the fresh-keeping bag main body (1) ) is provided with a third elastic sealing ring 19 between the inner surface of the side wall, the setting of the above-mentioned elastic sealing ring can ensure that the one-way exhaust valve 5 is connected with the nitrogen-oxygen cycle fresh-keeping bag and the one-way exhaust valve 5 The airtightness of the upper part is good to avoid air leakage.

A carrying handle 6 is also arranged on the sealing part. The carrying handle 6 makes the nitrogen-oxygen cycle fresh-keeping bag easy to carry and carry, and has a higher degree of comfort in use.

As shown in Figure 2, the fresh-keeping bag main body 1 is made of a composite film material, and the composite film material includes a biaxially stretched nylon film layer 7, an adhesive layer 8 and a low-density polyethylene film layer 9 sequentially from the outside to the inside , the thickness of the biaxially stretched nylon film layer 7 is 1.3-1.8 μm, and the biaxial tensile strength is ≥ 180 MPa; the thickness of the low-density polyethylene film layer 9 is 15-20 μm, and the biaxial tensile strength is ≥ 10 MPa; The bonding layer 8 is a polyurethane adhesive layer evenly coated between the biaxially stretched nylon film layer 7 and the low-density polyethylene film layer 9 . The composite membrane material has undergone aging reaction treatment, the interlayer peeling strength is high, and material delamination will not occur during use, and the fish transport bag made of composite membrane material has low air permeability, and the oxygen in the bag is not easy to leak ;The bag body has good puncture resistance and impact resistance, is not easy to be damaged during transportation and use, and has good stability. The outward side of the composite film material is a biaxially stretched nylon film layer 7, on which the biaxially stretched nylon film layer 7 can print decorative patterns, patterns or other signs as required, so as to beautify the surface of the nitrogen-oxygen cycle fresh-keeping bag conveniently. Appearance, and can play a certain role in advertising.

When in use, put seafood or fruits and vegetables that need to be kept fresh into the bag. For seafood products, add a certain amount of water according to actual needs, and use high-temperature hot-pressing to seal the two sides of the opening. Use clips or binding tapes to close the opening of the plastic hose 3 at the air outlet; fill nitrogen or oxygen into the nitrogen-oxygen cycle fresh-keeping bag through the air intake channel 4, and the expansion of the bag will cause the edge of the bag to deform, resulting in a deformed bag The edge of the body squeezes and closes the second opening 12 with a small width, and closes the air intake passage 4, thereby sealing the nitrogen-oxygen cycle fresh-keeping bag. The nitrogen-oxygen cycle fresh-keeping bag can store a large amount of oxygen or nitrogen at a relatively high concentration, has high gas storage efficiency, and has a long survival time of seafood or fresh-keeping time of fruits and vegetables in the bag. After a period of transportation, if the oxygen in the bag is insufficient, or the seafood product and the fruit and vegetable product carry out respiration and discharge a certain amount of moisture and carbon dioxide, and when the gas in the bag needs to be replaced, open the opening of the plastic hose 3 at the air outlet, and pass The one-way exhaust valve 5 discharges the waste gas in the bag, then closes the opening of the plastic hose 3 at the air outlet, and injects fresh nitrogen or oxygen into the bag again through the air inlet channel 4 until the bag body is fully expanded. The nitrogen-oxygen cycle fresh-keeping bag can be inflated repeatedly, is convenient to use, saves transportation space and transportation cost, and is convenient for long-distance transportation.

The edges of the nitrogen-oxygen cycle fresh-keeping bag that need to be sealed can be processed and sealed by high-temperature hot pressing. The treatment temperature is 150-200°C. Layer 9 melts and combines with each other, and after cooling, the two low-density polyethylene film layers 9 are tightly combined, so that the sealing edge has good airtightness and greater peel strength; the high-temperature hot-pressing treatment speed is fast, and can be Continuous mass production.

The utility model is not limited to the above-mentioned best implementation mode, anyone can draw other various forms of products under the enlightenment of the utility model, but no matter make any changes in its shape or structure, all have the same features as the application Or similar technical schemes all fall within the protection scope of the present utility model.

Claims (7)

1. A nitrogen-oxygen cycle fresh-keeping bag, characterized in that, comprises a fresh-keeping bag main body (1) and a one-way exhaust valve (5), and the one-way exhaust valve (5) runs through and is arranged on the fresh-keeping bag main body ( 1) on the side wall; The edge of the fresh-keeping bag main body (1) is provided with an opening (2) and a sealing portion, and inside the sealing portion is a curved strip-shaped air intake passage (4) that runs through the width of the sealing portion, and the air intake passage One end of (4) is provided with the first opening (11) that communicates with the external environment, and the other end of the air inlet channel (4) is provided with the second opening that communicates with the inner cavity of the fresh-keeping bag main body (1). The opening (12), the width of the air intake channel (4) gradually decreases from the outside to the inside. 2. The nitrogen-oxygen cycle fresh-keeping bag according to claim 1, characterized in that, the curved strip-shaped air intake channel (4) is an s-shaped or reverse s-shaped channel; the width of the first opening (11) is 5.5-9.5mm, the width of the second opening (12) is 1mm-2.5mm; the sealing part is a sealing structure with equal width everywhere, and the width of the sealing part is 15-25mm. 3. The nitrogen-oxygen cycle fresh-keeping bag according to claim 1, characterized in that, the one-way exhaust valve (5) includes plastic air outlets in sequence from the outside to the inside of the side wall of the main body (1) of the fresh-keeping bag. The hose (3), the first fixing part (10), the one-way ventilation part (13) and the second fixing part (14); the one-way ventilation part (13) is a hollow tubular structure, and the one-way ventilation part The outer surface of the side wall of (13) is provided with a fixed clamp (16), and the lower surface of the fixed clamp (16) is arranged close to the outer surface of the side wall of the main body of the fresh-keeping bag. The part of the lower end of the fixing clamp (16) passes through the side wall of the main body (1) of the fresh-keeping bag and is connected and fixed with the second fixing part (14). The upper inner wall of the tubular structure is provided with a circle of small blades along the horizontal direction. (15), the tips of the small blades (15) converge at the central axis of the tubular structure and slightly protrude toward the upper end of the tubular structure. 4. The nitrogen-oxygen circulation fresh-keeping bag according to claim 3, characterized in that, the tubular structure is connected and fixed with the first fixing part (10) and the second fixing part (14) by threads; A first elastic sealing ring (17) is arranged between a fixed part (10) and the plastic hose (3) of the air outlet, and the side wall of the fixed clamp (16) and the fresh-keeping bag main body (1) A second elastic sealing ring (18) is arranged between the outer surfaces, and a third elastic sealing ring (19) is arranged between the second fixing part (14) and the inner surface of the side wall of the fresh-keeping bag main body (1). . 5. The nitrogen-oxygen circulation fresh-keeping bag according to any one of claims 1-4, characterized in that, a carrying handle (6) is also provided on the sealing part. 6. The nitrogen-oxygen cycle fresh-keeping bag according to any one of claims 1-4, characterized in that, the main body (1) of the fresh-keeping bag is made of a composite film material, and the composite film material is sequentially arranged from the outside to the inside It includes a biaxially stretched nylon film layer (7), an adhesive layer (8) and a low-density polyethylene film layer (9). 7. The nitrogen-oxygen cycle fresh-keeping bag according to claim 6, characterized in that, the thickness of the biaxially stretched nylon film layer (7) is 1.3-1.8 μm, and the biaxial tensile strength is ≥180MPa; the low-density polyamide The thickness of the ethylene film layer (9) is 15-20 μm, and the biaxial tensile strength is ≥ 10 MPa; the adhesive layer (8) is uniformly coated on the biaxially oriented nylon film layer (7) and the low-density polyethylene film A polyurethane adhesive layer between the layers (9); the composite membrane material is used to manufacture the nitrogen-oxygen circulation fresh-keeping bag after being cured.