Improved moisture-proof breathable paper bag

Abstract

The utility model relates to an improved moisture-proof breathable paper bag which comprises a paper bag body, a feeding cuff is arranged in the upper bottom of the paper bag body, a lower connecting outer layer is connected with the lower bottom of the paper bag body through a plurality of glue belts, and the glue belts are divided into continuous glue belts and gap glue belts. The continuous glue tape is arranged from the joint of the lower connecting outer layer and the outer end of the outer folding edge to the joint of the lower connecting outer layer and the inner side of the inner end of the outer folding edge, and the gap glue tape is arranged from the joint of the lower connecting outer layer and the outer side of the inner end of the outer folding edge to the joint of the lower connecting outer layer and the outer end of the inner folding edge. And an air hole ring II is arranged on the pure kraft paper inner layer, the air hole ring I and the air hole ring II are gradually enlarged from bottom to top, and the air hole ring I and the air hole ring II are arranged in a staggered manner. The utility model is breathable and moisture-proof, is reliable to use, and is suitable for various filling speeds.

Description

Technical Field

[0001] The utility model relates to a packaging bag, in particular to a moisture-proof and breathable paper bag. Background Art

[0002] Valve mouth packaging bags are one of the commonly used packaging for powdered materials. They have many advantages, such as light weight, low cost, easy filling, easy stacking, and neat stacking. Existing valve mouth packaging bags have poor air permeability. During the filling and inflation process, the air pressure inside the bag is high, which easily causes the bag to burst. In order to reduce the risk of bag bursting, it is necessary to reduce the filling speed and extend the filling time, which significantly reduces production efficiency. Summary of the invention

[0003] Purpose of the invention: The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an improved moisture-proof and breathable paper bag which is both breathable and moisture-proof, reliable to use, and suitable for various filling speeds.

[0004] Technical solution: In order to solve the above technical problems, the improved moisture-proof and breathable paper bag described in the utility model comprises a paper bag body, a feeding cuff is arranged in the upper bottom of the paper bag body, the paper bag body is folded by a coated paper outer layer, a pure kraft paper middle layer, and a pure kraft paper inner layer, an upper connecting outer layer is arranged on the upper bottom of the paper bag body, and a lower connecting outer layer is arranged on the lower bottom of the paper bag body, and the lower connecting outer layer is connected to the lower bottom by a plurality of glue tapes, and the glue tapes are divided into continuous glue tapes and intermittent glue tapes. A gap glue tape, wherein the continuous glue tape is arranged from the lower connecting outer layer and the outer end of the outer folding edge to the lower connecting outer layer and the inner end of the outer folding edge inner side connection, and the gap glue tape is arranged from the lower connecting outer layer and the outer end of the outer folding edge outer side connection to the lower connecting outer layer and the outer end of the inner folding edge connection, a breathable hole circle I is arranged on the pure kraft paper middle layer, and a breathable hole circle II is arranged on the pure kraft paper inner layer, the breathable hole circle I and the breathable hole circle II gradually increase from bottom to top, and the breathable hole circle I and the breathable hole circle II are staggered.

[0005] Furthermore, an exhaust valve is provided on the paper bag body, and the exhaust valve includes a valve body, a valve core and a valve body spring. An air inlet is provided at one end of the valve body, and an air outlet is provided at the other end of the valve body. A chamber is provided in the valve body, and a valve core is provided in the chamber. A pair of ventilation cavities are provided on both sides of the valve core, and a rubber valve head is installed at one end of the valve core, and a valve ball is provided on one side of the rubber valve head, and a valve body spring is sleeved on the valve ball. An annular fixing piece is installed on the air outlet near the chamber, and one end of the annular fixing piece is connected to the valve body spring, and a plurality of through holes are provided on the surface of the annular fixing piece. The air inlet is provided with an inclination angle on the side near the ventilation cavity, and the diameter of the rubber valve head is slightly larger than the diameter of the air inlet.

[0006] Furthermore, the pure kraft paper middle layer and the pure kraft paper inner layer are bonded and connected.

[0007] Furthermore, the feed cuff is bonded and fixed inside the upper bottom of the paper bag body.

[0008] Furthermore, the valve core is constructed as a hollow columnar structure.

[0009] Furthermore, the exhaust valve is arranged in the upper middle part of the paper bag body.

[0010] Beneficial effect: Compared with the prior art, the utility model has the following significant advantages: the overall structure of the utility model is reasonably arranged, and the outer layer of the coated paper is adopted to effectively ensure the overall moisture-proof performance. The outer layer of the coated paper and the front surface of the pure kraft paper middle layer are not connected by glue, so as to ensure smooth internal exhaust. The gas during filling is discharged from the staggered air hole ring between the pure kraft paper middle layer and the pure kraft paper inner layer, and then discharged through the channel between the gap glue belts. The gap glue belt is set from the lower connection outer layer and the outer end of the outer folding edge to the lower connection outer layer and the outer end of the inner folding edge. The air venting effect is good at the joint. The air vent rings Ⅰ and Ⅱ gradually increase from bottom to top. During the bagging process, since the material enters the lower part first, it will have an outward support force on the paper bag body, thereby making the lower air vent ring larger. Therefore, when setting, the lower air vent ring is smaller to prevent the material from leaking out. An exhaust valve is provided on the paper bag body. When the filling speed is slow, there is no need to open the exhaust valve, and the air can be exhausted through the air vent ring. When the filling speed is fast, since the air vent ring is slow to exhaust, the exhaust valve can be opened to exhaust in time, so it is suitable for various filling speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0013] Figure 3 It is a schematic diagram of the hierarchical structure of the valve bag body in the utility model;

[0014] Figure 4 It is a structural schematic diagram of the lower bottom of the utility model;

[0015] Figure 5 It is a structural schematic diagram of the exhaust valve in the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0017] like Figure 1 , Figure 3 and Figure 4 As shown, the improved moisture-proof and breathable paper bag of the utility model comprises a paper bag body 1, a feeding cuff 2 is bonded inside the upper bottom of the paper bag body 1, the paper bag body 1 is folded by a coated paper outer layer 1.1, a pure kraft paper middle layer 1.2, and a pure kraft paper inner layer 1.3, the pure kraft paper middle layer 1.2 and the pure kraft paper inner layer 1.3 are bonded and connected, an upper connecting outer layer is provided on the upper bottom of the paper bag body 1, a lower connecting outer layer 3 is provided on the lower bottom of the paper bag body 1, the lower connecting outer layer 3 is connected to the lower bottom by a plurality of glue tapes, and the glue tapes are divided into continuous Glue tape 4 and gap glue tape 5, the continuous glue tape 4 is set from the outer end connection of the lower connecting outer layer 3 and the outer folding edge 6 to the inner side connection of the lower connecting outer layer 3 and the inner end of the outer folding edge 6, the gap glue tape 5 is set from the outer end connection of the lower connecting outer layer 3 and the inner end of the outer folding edge 6 to the outer end connection of the lower connecting outer layer 3 and the inner folding edge 7, a breathable hole circle I8 is provided on the pure kraft paper middle layer 1.2, and a breathable hole circle II9 is ​​provided on the pure kraft paper inner layer 1.3, the breathable hole circle I8 and the breathable hole circle II9 gradually increase from bottom to top, and the breathable hole circle I8 and the breathable hole circle II9 are staggered. Example 2

[0018] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the improved moisture-proof and breathable paper bag described in the utility model comprises a paper bag body 1, a feeding cuff 2 is bonded inside the upper bottom of the paper bag body 1, the paper bag body 1 is folded by a coated paper outer layer 1.1, a pure kraft paper middle layer 1.2, and a pure kraft paper inner layer 1.3, the pure kraft paper middle layer 1.2 and the pure kraft paper inner layer 1.3 are bonded and connected, an upper connecting outer layer is provided on the upper bottom of the paper bag body 1, and a lower connecting outer layer 3 is provided on the lower bottom of the paper bag body 1, and the lower connecting outer layer 3 is connected to the paper bag body 1. The bottom is connected to the bottom through several glue tapes, and the glue tapes are divided into continuous glue tapes 4 and gap glue tapes 5. The continuous glue tape 4 is set from the outer end connection of the lower connecting outer layer 3 and the outer folding edge 6 to the inner side connection of the lower connecting outer layer 3 and the inner end of the outer folding edge 6. The gap glue tape 5 is set from the outer end connection of the lower connecting outer layer 3 and the inner end of the outer folding edge 6 to the outer end connection of the lower connecting outer layer 3 and the inner folding edge 7. A breathable hole circle I8 is provided on the pure kraft paper middle layer 1.2, and a breathable hole circle II9 is ​​provided on the pure kraft paper inner layer 1.3. The vent ring I8 and the vent ring II9 gradually increase in size from bottom to top, and the vent ring I8 and the vent ring II9 are staggered. An exhaust valve is provided on the middle and upper part of the paper bag body 1, and the exhaust valve includes a valve body 10, a valve core 11 and a valve body spring 12. An air inlet 13 is provided at one end of the valve body 10, and an air outlet 14 is provided at the other end of the valve body 10. A chamber is provided in the valve body 10, and a valve core 11 is provided in the chamber. A pair of ventilation cavities 15 are provided on both sides of the valve core 11 on the valve body 10. A rubber valve head 16 is installed at one end of the valve core 11, and a valve ball 17 is provided on one side of the rubber valve head 16, and a valve body spring 12 is mounted on the valve ball 17. An annular fixing part 18 is installed on the air outlet 14 near the chamber side, and one end of the annular fixing part 18 is connected to the valve body spring 12. A plurality of through holes are opened on the surface of the annular fixing part 18. The air inlet 13 is provided with an inclination angle on the side near the ventilation cavity 15, and the diameter of the rubber valve head 16 is slightly larger than the diameter of the air inlet 13.

[0019] The overall structure of the utility model is reasonably set up, and the outer layer of the laminated paper is adopted to effectively ensure the overall moisture-proof performance. The front of the laminated paper outer layer and the pure kraft paper middle layer is not connected by glue, which ensures that the internal exhaust is unobstructed. The gas during filling is discharged from the dislocated air hole circle between the pure kraft paper middle layer and the pure kraft paper inner layer, and then discharged through the channel between the gap glue belt. The gap glue belt is set from the lower connection outer layer and the outer end of the inner end of the outer fold to the lower connection outer layer and the outer end of the inner fold, which has a good exhaust effect and the air holes The size of the ring Ⅰ and the air hole ring Ⅱ gradually increases from bottom to top. During the bagging process, since the material enters the lower part first, it will exert an outward support force on the paper bag body, thereby making the lower air hole ring larger. Therefore, when setting, the lower air hole ring is smaller to prevent the material from leaking out. An exhaust valve is provided on the paper bag body. When the filling speed is slow, there is no need to open the exhaust valve, and the air can be exhausted through the air hole ring. When the filling speed is fast, since the air exhaust of the air hole ring is slow, the exhaust valve can be opened to exhaust in time, so it is suitable for various filling speeds.

[0020] The present invention provides a thought and method. There are many methods and ways to implement the technical solution. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. Improved moisture-proof and breathable paper bag, characterized by: The invention comprises a paper bag body (1), wherein a feeding cuff (2) is provided in the upper bottom of the paper bag body (1), wherein the paper bag body (1) is folded from a coated paper outer layer (1.1), a pure kraft paper middle layer (1.2), and a pure kraft paper inner layer (1.3), wherein an upper connecting outer layer is provided on the upper bottom of the paper bag body (1), and a lower connecting outer layer (3) is provided on the lower bottom of the paper bag body (1), wherein the lower connecting outer layer (3) is connected to the lower bottom by a plurality of glue tapes, wherein the glue tapes are divided into a continuous glue tape (4) and a gap glue tape (5), wherein the continuous glue tape (4) is connected from the lower connecting outer layer (3) to the lower bottom. ) and the outer end connection of the outer folding edge (6) are arranged to the inner side connection of the lower connecting outer layer (3) and the inner end of the outer folding edge (6), the gap glue tape (5) is arranged from the outer side connection of the lower connecting outer layer (3) and the inner end of the outer folding edge (6) to the outer end connection of the lower connecting outer layer (3) and the inner end of the inner folding edge (7), a breathable hole circle I (8) is arranged on the pure kraft paper middle layer (1.2), and a breathable hole circle II (9) is arranged on the pure kraft paper inner layer (1.3), the breathable hole circle I (8) and the breathable hole circle II (9) gradually increase from bottom to top, and the breathable hole circle I (8) and the breathable hole circle II (9) are staggered.

2. The improved moisture-proof and breathable paper bag according to claim 1, characterized in that: The paper bag body (1) is provided with an exhaust valve, the exhaust valve comprising a valve body (10), a valve core (11) and a valve body spring (12); an air inlet (13) is provided at one end of the valve body (10), and an air outlet (14) is provided at the other end of the valve body (10); a chamber is provided in the valve body (10), and a valve core (11) is provided in the chamber; a pair of ventilation cavities (15) are provided on both sides of the valve core (11) and on the valve body (10); a rubber valve head (16) is installed at one end of the valve core (11), and the A valve ball (17) is provided on one side of the rubber valve head (16), and a valve body spring (12) is sleeved on the valve ball (17); an annular fixing member (18) is installed on the air outlet (14) on the side close to the chamber; one end of the annular fixing member (18) is connected to the valve body spring (12); a plurality of through holes are provided on the surface of the annular fixing member (18); an inclination angle is provided on the side close to the ventilation cavity (15); and the diameter of the rubber valve head (16) is slightly larger than the diameter of the air inlet (13).

3. The improved moisture-proof and breathable paper bag according to claim 1, characterized in that: The pure kraft paper middle layer (1.2) and the pure kraft paper inner layer (1.3) are bonded and connected.

4. The improved moisture-proof breathable paper bag according to claim 1, characterized in that: The feed cuff (2) is bonded and fixed inside the upper bottom of the paper bag body (1).

5. The improved moisture-proof breathable paper bag according to claim 2, characterized in that: The valve core (11) is constructed as a hollow columnar structure.

6. The improved moisture-proof breathable paper bag according to claim 2, characterized in that: The exhaust valve is arranged at the upper middle part of the paper bag body (1).

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