Labyrinth exhaust paper bag

Abstract

The utility model relates to the technical field of labyrinth exhaust paper bags, in particular to a labyrinth exhaust paper bag which comprises an outer bag body and an exhaust device, an inner bag body is arranged on the inner wall of the outer bag body, hanging belts are arranged on the surface of the outer bag body, an exhaust area is arranged on the surface of the outer bag body, and the exhaust device is arranged in the inner wall of the inner bag body. The exhaust device comprises an anti-adhesion layer, an exhaust layer and a reinforcing layer, the anti-adhesion layer, the exhaust layer and the reinforcing layer are sequentially arranged from inside to outside, and the exhaust layer comprises a non-woven fabric layer. By arranging the exhaust device and the anti-adhesion layer, powder particles are difficult to adhere to the non-woven fabric layer, and the first conical micro-pores are matched with the second micro-pores, so that the anti-adhesion layer and the non-woven fabric layer are not easy to adhere to the non-woven fabric layer; multi-stage interception and blocking of powder particles can be achieved, gas exhaust resistance can be reduced and exhaust efficiency can be improved through the second micropores, deformation or damage of the first micropores and the second micropores caused by external force can be reduced through the reinforcing layers, and therefore the overall exhaust stability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of maze-style venting paper bags, and more particularly to maze-style venting paper bags. Background Technology

[0002] Maze-style venting paper bags typically have a double-layer membrane structure. The outer and inner membranes have micropores at designated locations, but the micropores in the inner and outer membranes are staggered and not directly connected. This design makes the flow path of gas and solid materials inside the bag resemble a maze, thus achieving the effect of gas venting.

[0003] Existing technologies, such as the utility model with publication number CN218617996U, relate to a maze-style one-way venting aluminum foil bag. It includes a bag body comprising a PE composite layer, a non-woven fabric layer outside the PE composite layer, and a PET layer outside the non-woven fabric layer. The PE composite layer includes an inner PE layer, an aluminum foil layer, and an outer PE layer. A dotted line area is provided on the PE composite layer, a microporous area is provided on the PET layer above the dotted line area, and a non-woven fabric venting area is provided on the non-woven fabric layer. The microporous area, the non-woven fabric venting area, and the dotted line area constitute a one-way venting area, which is located along the length of the bag body. The bag body has an inlet and outlet. This utility model allows for venting without powder leakage, has wear-resistant straps, and high strength. It solves the problems of aluminum foil bags, which are generally difficult to vent due to the aluminum film layer, resulting in a bulging bag body after filling, causing inconvenience in transportation and stacking; and the problem that the straps on the outer bag of aluminum foil bags are easily worn locally, resulting in generally low overall strength.

[0004] In daily work, it was found that existing labyrinth venting paper bags, due to the uniform micropore diameter, can only intercept particles larger than the micropore diameter during venting. This limited interception method makes it easy for smaller particles to enter the paper bag, causing blockage. Furthermore, the uniform micropore diameter results in greater resistance during gas expulsion, leading to low venting efficiency and poor overall venting performance. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of poor exhaust performance in existing technologies by proposing a labyrinth exhaust paper bag.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a maze-style vented paper bag, comprising an outer bag body and a venting device. An inner bag body is formed on the inner wall of the outer bag body. Straps are provided on the surface of the outer bag body, and a venting area is formed on the surface of the outer bag body. The venting device is disposed within the inner wall of the inner bag body. The venting device includes an anti-adhesion layer, a venting layer, and a reinforcing layer, arranged sequentially from the inside to the outside. The venting layer includes a non-woven fabric layer, the surface of which is provided with micropore one and micropore two. Micropore one is conical, with the larger inner diameter side of the cone closer to the inner bag body. Micropore two is cylindrical. The micropores are configured such that the second micropore is connected to the smallest inner diameter end of the first micropore, and the inner diameter of the second micropore is consistent with the maximum inner diameter of the first micropore. Through the above components, during exhaust, the conical structure of the first micropore, with its larger inner diameter close to the inner bag body, allows the gas to enter the first micropore more smoothly from the inner bag body when the gas needs to be discharged, thereby classifying and filtering the powder or impurities. Finally, the gas enters the second micropore. Because the inner diameter of the second micropore is the same as the maximum inner diameter of the first micropore, the exhaust efficiency is effectively improved, while reducing pressure loss. The anti-adhesion layer can reduce the adhesion of substances to the exhaust device, and the reinforcing layer can improve the overall strength of the exhaust system.

[0007] Preferably, the maximum inner diameter of the first micropore is 3 μm and the minimum inner diameter is 1 μm, and the inner diameter of the second micropore is 3 μm.

[0008] A non-stick layer made of polytetrafluoroethylene is sprayed onto the non-woven fabric layer. It has extremely low surface energy, making it very difficult for powder and impurities to adhere to its surface and preventing clogging.

[0009] Preferably, the reinforcing layer is made of plastic material. The plastic is made into a frame and bonded to the non-woven fabric by hot melting. Through the above components, the plastic frame reinforcing layer can strengthen the non-woven fabric layer and reduce the stress deformation damage to micropores one and micropore two in the non-woven fabric layer.

[0010] Preferably, the surface of the outer bag is provided with an auxiliary device, which includes a support strap. The support strap is fixedly connected to the bottom of the outer bag, and the four ends of the support strap are fixedly connected to the surfaces of four lifting straps respectively. With the above components, when the outer bag is lifted by the lifting straps, the lifting straps and the support strap can support and lift the bottom of the outer bag, thereby improving the overall strength.

[0011] Preferably, the support belt includes a first wear-resistant layer, a nylon belt layer, and a second wear-resistant layer, with the nylon belt layer located between the first and second wear-resistant layers. The first and second wear-resistant layers are made of polyurethane material. Through the above components, the nylon belt layer has high strength and toughness, and can withstand greater tensile force and weight. The addition of the first and second wear-resistant layers made of polyurethane material further enhances the overall strength and stability of the support belt.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting an exhaust device and using an anti-adhesion layer, it is difficult for powder particles to adhere to the non-woven fabric layer. Furthermore, the combination of conical micropore one and micropore two can achieve multi-level interception and blocking of powder particles. In addition, the addition of micropore two can reduce the resistance to gas exhaust and improve exhaust efficiency. The reinforcing layer can reduce the deformation or damage of micropore one and micropore two caused by external forces, thereby ensuring the overall stability of exhaust.

[0014] 2. In this utility model, by setting an auxiliary device, the outer bag can be supported by a support strap when the outer bag is lifted by the sling, thereby improving the bottom strength. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the labyrinth ventilation paper bag is provided for this utility model;

[0016] Figure 2 A side view structural diagram of the labyrinth ventilation paper bag proposed in this utility model;

[0017] Figure 3 A schematic diagram of the ventilation device structure of the labyrinth ventilation paper bag proposed in this utility model;

[0018] Figure 4 A schematic diagram of the ventilation layer structure of the labyrinth ventilation paper bag proposed in this utility model;

[0019] Figure 5 A schematic diagram of the auxiliary device structure for the maze-shaped air-venting paper bag proposed in this utility model;

[0020] Figure 6 This is a cross-sectional structural diagram of the auxiliary device for the labyrinth ventilation paper bag proposed in this utility model.

[0021] Legend:

[0022] 1. Outer bag body; 2. Inner bag body; 3. Lifting straps; 4. Venting device; 41. Anti-adhesion layer; 42. Venting layer; 421. Non-woven fabric layer; 422. Micropore one; 423. Micropore two; 43. Reinforcing layer; 5. Venting area; 6. Auxiliary device; 61. Support belt; 611. First abrasion-resistant layer; 612. Nylon belt layer; 613. Second abrasion-resistant layer. Detailed Implementation

[0023] Please see Figures 1-6 This utility model provides a technical solution: a maze-shaped venting paper bag, including an outer bag body 1 and a venting device 4. An inner bag body 2 is provided on the inner wall of the outer bag body 1, a strap 3 is provided on the surface of the outer bag body 1, a venting area 5 is provided on the surface of the outer bag body 1, and the venting device 4 is provided in the inner wall of the inner bag body 2.

[0024] Specifically, the exhaust device 4 includes an anti-adhesion layer 41, an exhaust layer 42, and a reinforcing layer 43. The anti-adhesion layer 41, the exhaust layer 42, and the reinforcing layer 43 are arranged sequentially from the inside to the outside. The exhaust layer 42 includes a non-woven fabric layer 421. The surface of the non-woven fabric layer 421 is provided with micropores 1 422 and micropores 2 423. Micropores 1 422 are cone-shaped, with the larger inner diameter side of the cone close to the inner bag body 2. Micropores 2 423 are cylindrical and are connected to the smallest inner diameter end of micropores 1 422. The inner diameter of micropores 2 423 is consistent with the largest inner diameter of micropores 1 422.

[0025] In this implementation scheme: During venting, the conical structure of micropore 422, with its larger inner diameter close to the inner bag body 2, allows gas to enter micropore 422 more smoothly from the inner bag body 2 when gas needs to be discharged, thereby classifying and filtering powder or impurities. Finally, the gas enters micropore 423. Because the inner diameter of micropore 423 is the same as the maximum inner diameter of micropore 422, the venting efficiency is effectively improved, while reducing pressure loss. The anti-adhesion layer 41 can reduce the adhesion of substances to the venting device 4, and the reinforcing layer 43 can improve the overall strength of the venting system.

[0026] Specifically, the maximum inner diameter of micropore 422 is 3μm and the minimum inner diameter is 1μm, while the inner diameter of micropore 423 is 3μm.

[0027] In this embodiment: a non-adhesive layer 41 made of polytetrafluoroethylene is sprayed onto the non-woven fabric layer 421. This layer has extremely low surface energy, making it very difficult for powder and impurities to adhere to its surface and preventing clogging.

[0028] Specifically, the reinforcing layer 43 is made of plastic. The plastic is made into a frame and is bonded to the non-woven fabric by hot melting. The plastic frame reinforcing layer 43 can reinforce the non-woven fabric layer 421 and reduce the stress deformation damage to the micropores 422 and 423 in the non-woven fabric layer 421.

[0029] Specifically, the surface of the outer bag 1 is provided with an auxiliary device 6, which includes a support strap 61. The support strap 61 is fixedly connected to the bottom of the outer bag 1, and the four ends of the support strap 61 are fixedly connected to the surfaces of four lifting straps 3 respectively.

[0030] In this implementation plan: when the outer bag 1 is lifted by the sling 3, the sling 3, together with the support belt 61, can support and lift the bottom of the outer bag 1, thereby improving the overall strength.

[0031] Specifically, the support belt 61 includes a first wear-resistant layer 611, a nylon belt layer 612, and a second wear-resistant layer 613. The nylon belt layer 612 is located between the first wear-resistant layer 611 and the second wear-resistant layer 613. The first wear-resistant layer 611 and the second wear-resistant layer 613 are made of polyurethane material.

[0032] In this embodiment: the nylon belt layer 612 has high strength and toughness and can withstand large tensile forces and weights, while the addition of the first wear-resistant layer 611 and the second wear-resistant layer 613 of polyurethane material further enhances the overall strength and stability of the support belt 61.

[0033] Working principle: During venting, gas and powder particles sequentially enter the anti-adhesion layer 41, the venting layer 42, and the reinforcing layer 43, and then exit through the venting zone 5. The anti-adhesion layer 41, made of polytetrafluoroethylene, has extremely low surface energy, making it very difficult for powder and impurities to adhere to its surface and preventing clogging. After entering the venting layer 42, the conical structure of micropore 422, with its larger inner diameter close to the inner bag body 2, allows gas to flow more smoothly from the inner bag body 2 into micropore 422 when it needs to be released. This facilitates the grading and filtration of powder or impurities, reducing their leakage along with the gas. Finally, the gas enters micropore 423, because micropore 422... The inner diameter of 423 is the same as the maximum inner diameter of micropore 422, which effectively improves the exhaust efficiency. The plastic frame reinforcement layer 43 can reinforce the non-woven fabric layer 421 and reduce the stress deformation damage of micropore 422 and micropore 423 in the non-woven fabric layer 421. After the outer bag 1 is lifted by the sling 3, the sling 3 and the support belt 61 can support and lift the bottom of the outer bag 1. The nylon belt layer 612 in the support belt 61 has high strength and toughness and can withstand greater tension and weight. The addition of the first wear-resistant layer 611 and the second wear-resistant layer 613 of polyurethane material further enhances the overall strength and stability of the support belt 61.

Claims

1. A labyrinth-style vented paper bag, comprising an outer bag body (1) and a venting device (4), characterized in that: The inner wall of the outer bag (1) is provided with an inner bag (2), the surface of the outer bag (1) is provided with a strap (3), the surface of the outer bag (1) is provided with a venting area (5), and the venting device (4) is provided in the inner wall of the inner bag (2). The venting device (4) includes an anti-adhesion layer (41), a venting layer (42), and a reinforcing layer (43). The anti-adhesion layer (41), the venting layer (42), and the reinforcing layer (43) are arranged sequentially from the inside to the outside. (42) Includes a nonwoven fabric layer (421), the surface of which is provided with micropore one (422) and micropore two (423). Micropore one (422) is conical, with the larger inner diameter side of the cone close to the inner bag body (2). Micropore two (423) is cylindrical, and micropore two (423) is connected to the smallest inner diameter end of micropore one (422), and the inner diameter of micropore two (423) is consistent with the largest inner diameter of micropore one (422).

2. The labyrinth ventilation paper bag according to claim 1, characterized in that: The maximum inner diameter of micropore one (422) is 3μm and the minimum inner diameter is 1μm, and the inner diameter of micropore two (423) is 3μm.

3. The labyrinth ventilation paper bag according to claim 1, characterized in that: The reinforcing layer (43) is made of plastic material, and the plastic is made into a frame and then bonded to the non-woven fabric by hot melting.

4. The labyrinth ventilation paper bag according to claim 1, characterized in that: The surface of the outer bag (1) is provided with an auxiliary device (6), which includes a support strap (61). The support strap (61) is fixedly connected to the bottom of the outer bag (1), and the four ends of the support strap (61) are fixedly connected to the surfaces of four slings (3).

5. The labyrinth ventilation paper bag according to claim 4, characterized in that: The support belt (61) includes a first wear-resistant layer (611), a nylon belt layer (612), and a second wear-resistant layer (613). The nylon belt layer (612) is located between the first wear-resistant layer (611) and the second wear-resistant layer (613). The first wear-resistant layer (611) and the second wear-resistant layer (613) are made of polyurethane material.

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