Double-layer liquid packaging bag

Abstract

The utility model relates to a double-layer liquid packaging bag which comprises a bag body, the bag body is provided with a front bag piece and a rear bag piece which are identical in structure, each of the front bag piece and the rear bag piece comprises an inner-layer membrane and an outer-layer membrane, the ratio of the thickness of the inner-layer membrane to the thickness of the outer-layer membrane is 1.3-1.5, and the ratio of the thickness of the inner-layer membrane to the thickness of the outer-layer membrane is 1.3-1.5. The edge of the inner-layer membrane and the edge of the outer-layer membrane are hot-pressed to form heat-sealing edges, and the heat-sealing edges of the front bag piece and the rear bag piece are in hot-pressing sealing fit. Due to the fact that the thickness of the inner layer membrane is 1.3-1.5 of the thickness of the outer layer membrane, the pressure bearing capacity of the packaging bag is improved, and the packaging bag is prevented from being broken in the isobaric liquid injection process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of liquid packing bag, and particularly relates to a double-layer liquid packing bag. BACKGROUND

[0002] In order to make the liquid in the packing bag, such as beer, not easy to bubble, the liquid is generally injected by the way of isobaric injection, and the packing bag is generally inflated and pressurized first, and then the liquid is injected, and the existing packing bag for isobaric injection is single-layer, and in the process of inflation and pressurization, the liquid packing bag is prone to rupture. UTILITY MODEL CONTENT

[0003] The utility model discloses a double-layer liquid packing bag, which enhances the pressure-bearing capacity and avoids rupture of the liquid packing bag during isobaric injection.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A double-layer liquid packing bag, comprising a bag body, the bag body has a front bag piece and a rear bag piece with the same structure, the front bag piece and the rear bag piece each comprise an inner film piece and an outer film piece, the thickness ratio of the inner film piece to the outer film piece is 1.3-1.5, the edges of the inner film piece and the outer film piece are heat-pressed to form a heat-sealed edge, and the heat-sealed edges of the front bag piece and the rear bag piece are heat-pressed and sealed.

[0006] As a preferred mode, the thickness of the inner film piece is 0.15-0.70 mm, and the thickness of the outer film piece is 0.1-0.45 mm.

[0007] As a preferred mode, the thickness of the inner film piece is 1.5 times the thickness of the outer film piece.

[0008] As a preferred mode, the inner film piece is composed of a first heat-sealed layer, a first pressure-bearing layer and a second heat-sealed layer in sequence.

[0009] As a preferred mode, the outer film piece is composed of a temperature-resistant layer, a second pressure-bearing layer and a third heat-sealed layer in sequence, and one side of the temperature-resistant layer is exposed outside the bag body.

[0010] As a preferred mode, the capacity of the bag body is 2.5-3 L.

[0011] As a preferred mode, the margin of the heat-sealed edge is 10-12 mm.

[0012] As a preferred mode, the first heat-sealed layer, the second heat-sealed layer and the third heat-sealed layer are all polyethylene, the first pressure-bearing layer and the second pressure-bearing layer are NY, and the temperature-resistant layer is PE.

[0013] As a preferred way, the upper end of the bag body is provided with a chamfer, and the chamfer is provided with a liquid outlet nozzle.

[0014] As a preferred way, the upper end of the bag body is provided with a hand carrying part.

[0015] The utility model discloses beneficial effect:

[0016] The utility model discloses beneficial effect:

[0017] For more clearly set forth the structure characteristics, technical means and the concrete purpose and function that it reached of the utility model, the following with specific embodiment to the utility model is further detailedly explained: DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is the section schematic diagram of the utility model;

[0020] Figure 3 It is Figure 2 The local enlarged view of position A in it;

[0021] Figure 4 It is Figure 2 The local enlarged view of position B in it;

[0022] Figure 5 It is Figure 2 The local enlarged view of position C in it;

[0023] Drawing mark explanation:

[0024] 10-bag body;11-inner layer diaphragm;111-first heat seal layer;112-pressure bearing layer;113-second heat seal layer;12-outer layer diaphragm;121-temperature resistant layer;122-second pressure bearing;123-third pressure bearing layer;13-heat seal edge;14-hand carrying part;15-chamfer;16-liquid outlet nozzle. CONCRETE IMPLEMENTATION

[0025] In the description of the utility model, need explanation, the orientation or position relation that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. indicate is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the position or element that is pointed to must have the specific orientation, with the specific orientation constructs and operates, therefore can not be understood as the restriction of the utility model.

[0026] In the description of the utility model, it is to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the above-mentioned term can be understood according to the specific meaning in the utility model.

[0027] As Figures 1-5 The utility model discloses a double-layer liquid packaging bag, including bag body 10, the bag body 10 has the same structure front bag piece and rear bag piece, the front bag piece and rear bag piece all include inner layer film piece 11 and outer layer film piece 12, the thickness ratio of inner layer film piece 11 and outer layer film piece 12 is 1.3~1.5, the edge of inner layer film piece 11 and the edge of outer layer film piece 12 are heat-pressed to form heat seal edge 13, and the heat seal edge 13 of the front bag piece and rear bag piece is heat-pressed sealing cooperation.In the utility model, the capacity of bag body 10 is 2.5~3L, and the margin of heat seal edge 13 is 10~12mm.

[0028] The thickness of the inner layer film piece 11 is 0.15~0.70mm, the thickness of the outer layer film piece 12 is 0.1~0.45mm, preferably, the thickness of the inner layer film piece 11 is 1.5 times the thickness of the outer layer film piece 12.

[0029] The inner layer film piece 11 is composed of a first heat seal layer 111, a first pressure bearing layer 112 and a second heat seal layer 113 in sequence.The outer layer film piece 12 is composed of a temperature-resistant layer 121, a second pressure bearing layer 122 and a third heat seal layer 123 in sequence, and one side of the temperature-resistant layer 121 is exposed outside the bag body 10.

[0030] In order to load the drinkable liquid, the first heat seal layer 111, the second heat seal layer 113 and the third heat seal layer 123 are all polyethylene, the first pressure bearing layer 112 and the second pressure bearing layer 122 are NY, and the temperature-resistant layer 121 is PE.

[0031] In order to facilitate pouring out the liquid, one side of the upper end of the bag body 10 is provided with a chamfer 15, and the chamfer 15 is provided with a liquid outlet nozzle 16.

[0032] In order to facilitate use, the upper end of the bag body 10 is provided with a hand-held part 14.

[0033] In summary, the thickness of the inner layer film piece is 1.3~1.5 times the thickness of the outer layer film piece, which increases the pressure-bearing capacity of the packaging bag and prevents the packaging bag from breaking during the process of equal-pressure liquid injection.

[0034] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and thus any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical spirit of the present application still falls within the scope of the technical scheme of the present application.

Claims

1. A double-layered liquid packaging bag comprising a bag body having a front bag sheet and a rear bag sheet of the same structure, characterized in that: the front bag sheet and the rear bag sheet each comprise an inner film sheet and an outer film sheet, and the ratio of the thickness of the inner film sheet to the thickness of the outer film sheet is 0.5 to 0.

9. 1.3-1.5, the edge of the inner film sheet and the edge of the outer film sheet are heat-pressed to form a heat-sealed edge, and the heat-sealed edges of the front bag sheet and the rear bag sheet are heat-sealed and matched.

2. A dual layer liquid packaging bag according to claim 1, characterized in that: The thickness of the inner film sheet is 0.15-0.70 mm, and the thickness of the outer film sheet is 0.1-0.45 mm.

3. A dual layer liquid packaging bag according to claim 1 or 2, characterized in that: The thickness of the inner film sheet is 1.5 times the thickness of the outer film sheet.

4. The dual layer liquid packaging bag of claim 1, wherein: The inner film sheet is composed of a first heat-sealed layer, a first pressure-bearing layer, and a second heat-sealed layer in sequence.

5. A dual layer liquid packaging bag according to claim 4, characterized in that: The outer film sheet is composed of a temperature-resistant layer, a second pressure-bearing layer, and a third heat-sealed layer in sequence, and one side of the temperature-resistant layer is exposed outside the bag body.

6. The dual layer liquid packaging bag of claim 1, wherein: The capacity of the bag body is 2.5-3 L.

7. The dual layer liquid packaging bag of claim 1, wherein: The margin of the heat-sealed edge is 10-12 mm.

8. A dual layer liquid packaging bag according to claim 5, characterized in that: The first heat-sealed layer, the second heat-sealed layer, and the third heat-sealed layer are all polyethylene, the first pressure-bearing layer and the second pressure-bearing layer are NY, and the temperature-resistant layer is PE.

9. The dual layer liquid packaging bag of claim 1, wherein: One side of the upper end of the bag body is provided with a chamfer, and a liquid outlet nozzle is arranged on the chamfer.

10. The dual layer liquid packaging bag of claim 1, wherein: The upper end of the bag body is provided with a hand-held part.

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