Anti-flatulence food packaging bag

Abstract

The utility model discloses an anti-flatulence food packaging bag which comprises a bag body, a gas one-way valve is tightly installed on the bag body, gas in the bag body can be exhausted outwards through the gas one-way valve, and the bag body sequentially comprises a PE polyethylene film layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer and a kraft paper layer from inside to outside. The PE polyethylene film layer and the aluminum foil layer are bonded together through a first adhesive layer, the aluminum foil layer and the kraft paper layer are bonded together through a second adhesive layer, the thickness of the PE polyethylene film layer is 28-32 microns, the thickness of the aluminum foil layer is 18-22 microns, and the thickness of the kraft paper layer is 80-150 microns. According to the utility model, the problems of over-high pressure and explosion in the food packaging bag can be avoided; the food packaging bag is simple in structure, good in barrier property, capable of effectively preventing permeation of moisture, oxygen and light rays and ensuring that food is not affected by moisture, oxidation and light rays in the storage and transportation process, high in bag body strength, good in toughness and tensile strength and not prone to being torn and damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing bag technical field, especially in a kind of anti-inflating food packing bag. BACKGROUND

[0002] Food packing bag is mainly to directly contact with food, for the packing bag of food storage and protection.In prior art, food packing bag is usually made of single layer or multi-layer composite plastic material, mainly for the food storage at normal temperature.The food packing bag in prior art mainly exists following problem: (1) when the hot food food that is obviously higher than room temperature is contained or the food packing bag is heated directly, the inflation hot gas in food packing bag can not be discharged, and the pressure in food packing bag is too high, food packing bag is prone to burst phenomenon, not only can produce piercing noise and make people frightened, but also can damage food;(2) the barrier property of traditional food packing bag is not good enough, difficult to prevent moisture, oxygen and light penetration, food is prone to be affected by moisture, oxidation and light during storage and transportation, in addition, the strength and toughness of traditional food packing bag are not high enough, and it is easy to tear and break. SUMMARY

[0003] The utility model solves the technical problem according to the insufficient of prior art, provide a kind of anti-inflating food packing bag, the gas one-way valve is closely installed on the bag body of the food packing bag, the gas in bag body can be discharged outside through the gas one-way valve, when the hot food food that is obviously higher than room temperature is contained in bag body or the food packing bag is heated directly, the inflation hot gas in food packing bag can be discharged in time through the gas one-way valve, avoid the problem that the pressure in food packing bag is too high, avoid the problem that food packing bag produces burst phenomenon;On the other hand, the barrier property of the food packing bag is good, can effectively prevent moisture, oxygen and light penetration, ensure that food will not be affected by moisture, oxidation and light during storage and transportation, and the bag body of the food packing bag is high in strength, and the toughness and tensile strength are good, not easy to tear and break.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: an anti-inflating food packing bag, comprising a bag body, a gas one-way valve is closely installed on the bag body, the gas in the bag body can be discharged outside through the gas one-way valve, the bag body comprises a PE polyethylene film layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer and a kraft paper layer from inside to outside, the PE polyethylene film layer and the aluminum foil layer are bonded together through the first adhesive layer, the aluminum foil layer and the kraft paper layer are bonded together through the second adhesive layer, the thickness of the PE polyethylene film layer is 28-32 μm, the thickness of the aluminum foil layer is 18-22 μm, and the thickness of the kraft paper layer is 80-150 μm.

[0005] Preferably, the PE polyethylene film layer has a thickness of 30 μm, the aluminum foil layer has a thickness of 20 μm, and the kraft paper layer has a thickness of 110-120 μm.

[0006] Preferably, the bag body comprises a front bag piece, a rear bag piece, a left bag piece and a right bag piece, the left end of the front bag piece is integrally connected with the front end of the left bag piece, the right end of the front bag piece is integrally connected with the front end of the right bag piece, the left end of the rear bag piece is integrally connected with the rear end of the left bag piece, the right end of the rear bag piece is integrally connected with the rear end of the right bag piece, and the lower ends of the front bag piece, the rear bag piece, the left bag piece and the right bag piece are heat-sealedly connected, and the heat-sealedly connected part has a heat-sealed edge.

[0007] Preferably, the middle part of the left bag piece is folded to the inside of the bag body to the right, the middle part of the right bag piece is folded to the inside of the bag body to the left, the rear bag piece comprises a rear bag piece left part and a rear bag piece right part, the rear bag piece left part is integrally connected with the rear end of the left bag piece, the rear bag piece right part is integrally connected with the rear end of the right bag piece, and the rear bag piece left part and the rear bag piece right part are heat-sealedly connected, and the heat-sealedly connected part has a heat-sealed strip.

[0008] Preferably, the gas one-way valve is tightly mounted on the inner side of the front bag piece, and the front bag piece is provided with a gas hole communicating with the gas one-way valve.

[0009] The utility model discloses a gas inflation prevention food packaging bag, which comprises a bag body, a gas one-way valve and a gas hole. (1) the gas one-way valve is tightly mounted on the bag body, so that the gas in the bag body can be discharged outward through the gas one-way valve, when the bag body contains hot food whose temperature is obviously higher than room temperature or the food packaging bag is heated directly, the expanded hot gas in the food packaging bag can be discharged in time through the gas one-way valve, the problem of excessively high pressure in the food packaging bag is avoided, and the problem of explosion of the food packaging bag is avoided. (2) the bag body comprises, from inside to outside, a PE polyethylene film layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer and a kraft paper layer, the PE polyethylene film layer can improve the heat-sealing performance of the bag body, the aluminum foil layer can improve the barrier performance of the bag body, can effectively prevent the penetration of moisture, oxygen and light, and can ensure that the food is not affected by moisture, oxidation and light during storage and transportation, and the kraft paper layer can improve the strength, toughness and tensile strength of the bag body, and the bag body is not easy to tear and damage. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Front view of the gas inflation prevention food packaging bag.

[0011] Figure 2 Inside view of the gas inflation prevention food packaging bag after being unfolded.

[0012] Figure 3 Top view of the gas inflation prevention food packaging bag after the bag opening is opened.

[0013] Figure 4 A schematic diagram of the layered structure of a food packaging bag designed to prevent bloating.

[0014] In the diagram: 1. Bag body; 2. Gas one-way valve; 3. PE polyethylene film layer; 4. First adhesive layer; 5. Aluminum foil layer; 6. Second adhesive layer; 7. Kraft paper layer; 11. Front bag panel; 12. Back bag panel; 13. Left bag panel; 14. Right bag panel; 15. Heat-sealed edge; 16. Heat-sealing strip. Detailed Implementation

[0015] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] like Figures 1-4 As shown, this utility model is an anti-bloating food packaging bag, including a bag body 1. A gas one-way valve 2 is tightly installed on the bag body 1, allowing gas inside the bag body 1 to be discharged outward through the gas one-way valve 2. The bag body 1 includes, from the inside out, a PE polyethylene film layer 3, a first adhesive layer 4, an aluminum foil layer 5, a second adhesive layer 6, and a kraft paper layer 7. The PE polyethylene film layer 3 and the aluminum foil layer 5 are bonded together by the first adhesive layer 4, and the aluminum foil layer 5 and the kraft paper layer 7 are bonded together by the second adhesive layer 6. The thickness of the PE polyethylene film layer 3 is 28-32 μm, preferably 30 μm; the thickness of the aluminum foil layer 5 is 18-22 μm, preferably 20 μm; and the thickness of the kraft paper layer 7 is 80-150 μm, preferably 110-120 μm.

[0017] Because a gas one-way valve 2 is tightly installed on the bag body 1, the gas inside the bag body 1 can be discharged outward through the gas one-way valve 2. When the bag body 1 contains hot food that is significantly hotter than room temperature, or when the food packaging bag is directly heated, the hot gas generated inside the food packaging bag can be discharged in time through the gas one-way valve 2, avoiding the problem of excessive pressure inside the food packaging bag and preventing the food packaging bag from bursting. The bag body 1 of this invention includes, from the inside out, a PE polyethylene film layer 3, a first adhesive layer 4, an aluminum foil layer 5, a second adhesive layer 6, and a kraft paper layer 7. Among them, the PE polyethylene film layer 3 provides good heat sealing performance of the bag body 1; the aluminum foil layer 5 provides good barrier performance of the bag body 1, effectively preventing the penetration of moisture, oxygen, and light, ensuring that the food is not affected by moisture, oxidation, and light during storage and transportation; the kraft paper layer 7 provides the bag body 1 with high strength, good toughness and tensile strength, and is not easy to tear or break.

[0018] like Figure 2 and Figure 3As shown, the bag body 1 includes a front bag piece 11, a rear bag piece 12, a left bag piece 13 and a right bag piece 14, the left end of the front bag piece 11 is integrally connected with the front end of the left bag piece 13, the right end of the front bag piece 11 is integrally connected with the front end of the right bag piece 14, the left end of the rear bag piece 12 is integrally connected with the rear end of the left bag piece 13, the right end of the rear bag piece 12 is integrally connected with the rear end of the right bag piece 14, the lower ends of the front bag piece 11, the rear bag piece 12, the left bag piece 13 and the right bag piece 14 are heat-sealedly connected, and the heat-sealedly connected part has a heat-sealed edge 15; by adopting this structure, the volume of the bag body 1 is large, and more food can be contained, and the whole front bag piece 11, the whole rear bag piece 12, the whole left bag piece 13 and the whole right bag piece 14 are integrally connected in a one-piece forming mode, so that the whole strength is better and the processing is easier.

[0019] As shown in the drawings, Figures 1-3 As shown, as a preferred mode of the utility model, the gas one-way valve 2 is tightly installed on the inner side of the front bag piece 11, and the front bag piece 11 is provided with a gas hole communicating with the gas one-way valve 2.

[0020] The processing method of the anti-gas-expanding food packaging bag is as follows: firstly, PE polyethylene continuous films, aluminum foil continuous films and kraft paper continuous films are respectively manufactured; then, the PE polyethylene continuous films and the aluminum foil continuous films are glued together by an adhesive, and the aluminum foil continuous films and the kraft paper continuous films are glued together by an adhesive, so as to form a multi-layer connecting film with a PE polyethylene film layer 3, a first adhesive layer 4, an aluminum foil layer 5, a second adhesive layer 6 and a kraft paper layer 7; then, according to the size of the bag body, the gas one-way valve 2 is tightly installed by punching at a set position of the multi-layer connecting film; then, the multi-layer connecting film with the gas one-way valve 2 is folded, hot-pressed and cut to form a single anti-gas-expanding food packaging bag. It should be noted that after the single anti-gas-expanding food packaging bag is manufactured and formed, the upper end bag opening part of the bag body 1 is in an open state, and after food is filled into the bag body 1 from the bag opening, the upper end bag opening is heat-sealed and closed by a hot melting machine.

[0021] The above is only the preferred embodiment of the present application, and any slight modification, equivalent change and modification made to the above embodiment according to the technical scheme of the present application are within the scope of the technical scheme of the present application.

Claims

1. An anti-gassing food packaging bag, characterized by: The bag body (1) is tightly installed with a gas one-way valve (2) on the top, the gas in the bag body (1) can be discharged outwards through the gas one-way valve (2), the bag body (1) comprises, from inside to outside, a PE polyethylene film layer (3), a first adhesive layer (4), an aluminum foil layer (5), a second adhesive layer (6) and a kraft paper layer (7), the PE polyethylene film layer (3) and the aluminum foil layer (5) are bonded together through the first adhesive layer (4), the aluminum foil layer (5) and the kraft paper layer (7) are bonded together through the second adhesive layer (6), the thickness of the PE polyethylene film layer (3) is 28-32 mu m, the thickness of the aluminum foil layer (5) is 18-22 mu m, and the thickness of the kraft paper layer (7) is 80-150 mu m.

2. The anti-gassing food packaging bag according to claim 1, characterized in that: The thickness of the PE polyethylene film layer (3) is 30 mu m, the thickness of the aluminum foil layer (5) is 20 mu m, and the thickness of the kraft paper layer (7) is 110-120 mu m.

3. The anti-gassing food packaging bag according to claim 1, characterized in that: The bag body (1) comprises a front bag piece (11), a rear bag piece (12), a left bag piece (13) and a right bag piece (14), the left end of the front bag piece (11) is integrally connected with the front end of the left bag piece (13), the right end of the front bag piece (11) is integrally connected with the front end of the right bag piece (14), the left end of the rear bag piece (12) is integrally connected with the rear end of the left bag piece (13), the right end of the rear bag piece (12) is integrally connected with the rear end of the right bag piece (14), and the lower ends of the front bag piece (11), the rear bag piece (12), the left bag piece (13) and the right bag piece (14) are heat-sealed, and the heat-sealed connection part has a heat-sealed edge (15).

4. The anti-gassing food packaging bag according to claim 3, characterized in that: The middle part of the left bag piece (13) is folded to the inside of the bag body (1) to the right, the middle part of the right bag piece (14) is folded to the inside of the bag body (1) to the left, the rear bag piece (12) comprises a rear bag piece left part (121) and a rear bag piece right part (122), the rear bag piece left part (121) is integrally connected with the rear end of the left bag piece (13), the rear bag piece right part (122) is integrally connected with the rear end of the right bag piece (14), and the rear bag piece left part (121) and the rear bag piece right part (122) are heat-sealed, and the heat-sealed connection part has a heat-sealed strip (16).

5. The anti-gassing food packaging bag according to claim 3, characterized in that: The gas one-way valve (2) is tightly installed on the inner side of the front bag piece (11), and the front bag piece (11) is provided with a gas hole communicating with the gas one-way valve (2).

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