A type of drawstring container bag

Abstract

This utility model discloses a drawstring FIBC (Flexible Interchange Bag), relating to the field of packaging bags. Its key technical features are: a bag body comprising a bag wall, a bag bottom, and a bag top; the bag wall forming a barrel-shaped structure; the bag bottom and bag top being respectively located at the bottom and top of the barrel-shaped bag wall; a lifting strap on the bag wall; a feeding port on the bag top; the feeding port comprising an inner bag opening and an outer bag opening; the tops of the inner and outer bag openings being connected, and their bottoms communicating with the bag body; an inner drawstring channel at the waist of the inner bag opening; an inner drawstring opening on the inner drawstring channel; an outer drawstring opening on the outer bag opening; the outer drawstring opening corresponding to the inner drawstring opening; an inner drawstring within the inner drawstring channel; the end of the inner drawstring extending from the inner drawstring opening and exposed through the outer drawstring opening; an outer drawstring channel at the waist of the outer bag opening; an outer drawstring opening on the outer drawstring channel; an outer drawstring within the outer drawstring channel; and the end of the outer drawstring extending from the inner drawstring opening. This achieves the purpose of improving the sealing effect.

Description

Technical Field

[0001] This utility model relates to a packaging bag, and more specifically, to a drawstring container bag. Background Technology

[0002] FIBCs (Flexible Intermediate Bulk Containers), widely used in the chemical, food, and mineral industries for loading powdery and granular materials, typically have thicker bag materials and some require an inner waterproof membrane. Current mainstream sealing methods have limitations: while strapping (tying the bag opening with rope) is simple, it can prevent the inner waterproof membrane from completely closing when the bag is thick, affecting the sealing effect; while heat-sealing (using a heat-sealing machine to bond the bag opening) can achieve a good seal, it requires specialized equipment, significantly increasing costs for small-batch production. Therefore, addressing the shortcomings of existing strapping sealing and the high cost of heat-sealing, there is an urgent need to develop a new, low-cost FIBC sealing solution that ensures excellent sealing performance (especially for bags with waterproof linings). Utility Model Content

[0003] The purpose of this utility model is to provide a container bag that achieves low cost and good sealing performance.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a drawstring bag, comprising a bag body, the bag body including a bag wall, a bag bottom and a bag top; the bag wall is closed to form a barrel-shaped configuration; the bag bottom and bag top are respectively located at the bottom and top of the barrel-shaped bag wall; a lifting strap is also provided on the bag wall; a feed inlet is provided on the bag top; the feed inlet includes an inner bag opening and an outer bag opening; the tops of the inner bag opening and the outer bag opening are connected, and the bottoms are connected to the bag body; an inner rope channel is provided at the waist of the inner bag opening; an inner rope opening is provided on the inner rope channel; an outer channel opening is provided on the outer bag; the outer channel opening corresponds to the inner rope opening; an inner drawstring is provided in the inner rope channel; the rope end of the inner drawstring extends out from the inner rope opening and is exposed through the outer channel opening; an outer rope channel is provided at the waist of the outer bag opening; an outer rope opening is provided on the outer rope channel; an outer drawstring is provided in the outer rope channel; the rope end of the outer drawstring extends out from the inner rope opening.

[0005] Furthermore, the inner rope path has two inner rope openings, and two inner binding ropes are installed inside the inner rope path; the ends of the two inner binding ropes extend out from the two inner rope openings respectively; the outer rope path has two outer rope openings, and two outer binding ropes are installed inside the outer rope path; the ends of the two outer binding ropes extend out from the two outer rope openings respectively.

[0006] Furthermore, the feed inlet is located at the edge of the top of the bag; the top of the bag is inclined towards the feed inlet around its perimeter; the bag wall is provided with hanging ears; the hanging ears and the feed inlet are positioned corresponding to the center of the bag body.

[0007] Furthermore, the bag wall is provided with a group of reinforcing ribs, which includes a first reinforcing rib and a second reinforcing rib; the tops of the first reinforcing rib and the second reinforcing rib are connected by a sling; multiple groups of the reinforcing ribs are provided on the bag wall; the multiple groups of the reinforcing ribs are evenly distributed along the bag wall.

[0008] Furthermore, the bottom of the bag is provided with a pressure-bearing rib; the bottom of the first reinforcing rib of any reinforcing rib group is connected to the bottom of the second reinforcing rib of the next reinforcing rib group through the pressure-bearing rib; the middle of the bag wall is provided with an explosion-proof rib; the explosion-proof rib is arranged horizontally around the bag wall.

[0009] Furthermore, a pressure relief port is provided at the top of the bag; a pressure relief assembly is provided on the pressure relief port; the pressure relief assembly connects the inside and outside of the bag body; the pressure relief assembly includes a dustproof box and a filter sponge; the dustproof box includes an upper cover plate and a lower cover plate; the upper cover plate and the lower cover plate are interlocked; the filter sponge is placed inside the dustproof box; the lower cover plate is provided with a vent hole; the upper cover plate is provided with an exhaust hole; a sealing cover is also provided on the upper cover plate; the sealing cover is movably connected to the upper cover plate; the sealing cover is used to block the exhaust hole.

[0010] Furthermore, the lower cover plate includes a base plate and a retaining wall; the retaining wall is disposed on the base plate and protrudes upward; the retaining wall encloses and divides the base plate into an inner area and an outer edge; the inner area of ​​the base plate and the retaining wall form a filter cavity for accommodating the filter sponge; the vent is disposed in the inner area of ​​the base plate; a first retaining edge is provided on the retaining wall; the upper cover plate includes an outer frame; the vent is disposed on the inner side of the outer frame; a sealing plate is also disposed on the inner side of the outer frame; the sealing plate covers the inner side of the outer frame, and the unsealed part is the vent; a sliding groove is provided on the inner side of the outer frame; the two sides of the sealing cover are disposed in the sliding groove; the sealing cover slides along the sliding groove to seal or open the vent; a second retaining edge is provided below the outer frame; the first retaining edge and the second retaining edge cooperate with each other to engage and connect the upper cover plate and the lower cover plate.

[0011] Furthermore, a sealing wall is provided on the base plate; the sealing wall is connected to the card wall and is provided along the inner side of the card wall; the height of the sealing wall is lower than that of the card wall; and the filter sponge is provided with a protrusion adapted to the sealing wall.

[0012] In summary, this utility model has the following beneficial effects: The container bag provided by this utility model has its inlet located at the edge of the top of the bag, and a hanging ear at the corresponding position on the center of the other side of the bag. After the bag is hoisted, the hanging ear is raised by the hook, allowing the material to be poured out from the inlet. This eliminates the need for bottom disassembly, enabling the container bag to be reused; and the elimination of the need for a bottom outlet avoids the problem of stress concentration and cracking at the outlet, which could lead to material leakage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of Example 1. Figure 2 and Figure 3 These are schematic diagrams of Examples 2, 3, and 4 from different angles. Figure 4 and Figure 5 This is a schematic diagram of Example 5. Figure 6 and Figure 7 They are Figure 5 Enlarged views of points A and B In the diagram: 11. Bag wall; 12. Bag nail; 13. Bag bottom; 21. First reinforcing rib; 22. Second reinforcing rib; 23. Lifting strap; 24. Hanging ear; 25. Explosion-proof rib; 26. Pressure-bearing rib; 3. Feed inlet; 31. Inner bag opening; 311. Inner drawstring; 32. Outer bag opening; 321. Outer drawstring; 322. Outer drawstring channel; 323. Outer channel opening; 4. Pressure relief assembly; 41. Top cover plate; 411. Outer frame; 4111. Second snap-fit ​​edge; 412. Sealing plate; 413. Sealing cover; 42. Bottom cover plate; 421. Bottom plate; 422. Clip wall; 4221. First snap-fit ​​edge; 423. Vent hole; 424. Sealing wall; 43. Filter sponge. Detailed Implementation

[0014] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component. This "connection" is not limited to a fixed connection or a movable connection; the specific connection method should be determined based on the specific technical problem to be solved.

[0016] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] Example 1: A drawstring container bag includes a bag body, which comprises a bag wall 11, a bag bottom 13, and a bag top; the bag wall 11 forms a barrel-shaped configuration. The barrel-shaped configuration can be a cylindrical configuration or a cubic configuration. The bag bottom 13 and the bag top are respectively located at the bottom and top of the barrel-shaped bag wall 11. A lifting strap 23 is also provided on the bag wall 11. The lifting strap 23 is used to connect to lifting equipment to realize the handling of the container bag. The bag wall 11, bag bottom 13, and bag top are made of a double-layer composite material, the outer layer being one of polypropylene woven fabric, polyester fiber, and nylon; and one of polyethylene film, polypropylene film, and aluminum foil film.

[0019] The feed inlet 3 includes an inner bag opening 31 and an outer bag opening 32; the tops of the inner bag opening 31 and the outer bag opening 32 are connected, and the bottoms are connected to the bag body. The inner bag opening 31 is a polyethylene film or a polypropylene film. The outer bag opening 32 is one of polypropylene woven fabric, polyester fiber, or nylon.

[0020] The inner bag opening 31 has an inner drawstring channel at its waist; an inner drawstring opening is provided on the inner drawstring channel; the outer bag has an outer drawstring opening 323; the outer drawstring opening 323 corresponds to the inner drawstring opening; an inner drawstring 311 is provided inside the inner drawstring channel; the end of the inner drawstring 311 extends from the inner drawstring opening and is exposed through the outer drawstring opening 323; the outer bag opening 32 has an outer drawstring channel 322 at its waist; an outer drawstring opening is provided on the outer drawstring channel 322; an outer drawstring 321 is provided inside the outer drawstring channel 322; the end of the outer drawstring 321 extends from the inner drawstring opening. The waist section has an inner drawstring channel with two independent inner drawstrings 311 inside, their ends passing through the inner drawstring openings to the surface of the outer bag. When tightened, the inner drawstrings 311 form the main sealing layer, directly bearing the material pressure. The waist section has an outer drawstring channel 322 with two outer drawstrings 321 inside, their ends passing through the outer drawstring openings. The outer drawstring 321 serves as a secondary protective layer, blocking external impacts and compensating for potential secondary leaks caused by the inner layer seal. Compared to a solution where the inner bag opening 31 and the outer bag opening 32 are tied simultaneously, this embodiment ties the inner bag opening 31 and the outer bag opening 32 separately, avoiding the problem of loose closure caused by an excessively thick outer layer material.

[0021] Preferably, the inner rope channel has two inner rope openings, and two inner binding ropes 311 are provided inside the inner rope channel; the rope ends of the two inner binding ropes 311 extend out from the two inner rope openings respectively; the outer rope channel 322 has two outer rope openings, and two outer binding ropes 321 are provided inside the outer rope channel 322; the rope ends of the two outer binding ropes 321 extend out from the two outer rope openings respectively.

[0022] Preferably, the inner rope channel is positioned lower than the outer rope channel 322 at the feed inlet 3. In use, first tighten the inner rope 311, then tighten the outer rope 321, and finally fold the feed inlet 3 in half. Use the remaining length of the outer rope 321 or the inner rope 311 to wrap around the folded feed inlet 3 to form four barriers, which can better prevent material leakage.

[0023] Example 2: To address the issue of reusable container bags, based on the aforementioned examples, this example provides a drawstring container bag, comprising a bag body including a bag wall 11, a bag bottom 13, and a bag top; the bag wall 11 forms a barrel-shaped configuration. The barrel-shaped configuration can be cylindrical or cubic. The bag bottom 13 and bag top are respectively located at the bottom and top of the barrel-shaped bag wall 11. A lifting strap 23 is also provided on the bag wall 11. The lifting strap 23 is used to connect to lifting equipment to facilitate the handling of the container bag. The bag wall 11, bag bottom 13, and bag top are made of a double-layer composite material; the outer layer is one of polypropylene woven fabric, polyester fiber, or nylon; and one of polyethylene film, polypropylene film, or aluminum foil film.

[0024] A feed inlet 3 is provided on the top of the bag; the feed inlet 3 is located at the edge of the top of the bag; the top of the bag is inclined towards the feed inlet 3. When emptying the material in the container bag, first untie the lifting straps 23 near the feed inlet 3, keeping at least two lifting straps 23 in a suspended state, and lift the bottom of the container bag. As the bottom rises above the height of the feed inlet 3, the material will be continuously released from the feed inlet 3, achieving material discharge. Setting the feed inlet 3 at the edge of the top of the bag makes it easier for the material to be discharged; at the same time, the top of the bag is inclined towards the feed inlet 3, forming a funnel shape when pouring, which can better discharge the material. Preferably, the bag body is cubic in shape, the feed inlet 3 is located near the top corner of the bag top, and the hanging ears 24 are located on the cubic bag body, at the top corner corresponding to the feed inlet 3.

[0025] The bag wall 11 is provided with hanging ears 24; the hanging ears 24 are arranged corresponding to the feed inlet 3 around the center of the bag body. The hanging ears 24 are connected to the lifting device, which can easily lift the bottom 13 of the bag upwards. Furthermore, because the hanging ears 24 and the feed inlet 3 are arranged corresponding to the center of the bag body, dead corners inside the bag are reduced during emptying, preventing material from accumulating in these corners and being unable to drain. Preferably, the straps 23 on both sides of the hanging ears 24 are kept in a suspended state during use.

[0026] Example 3: To address the reliability issue of the loop 24, this example provides a drawstring container bag. Based on any of the above examples, the bag wall 11 is provided with reinforcing ribs, including a first reinforcing rib 21 and a second reinforcing rib 22. The tops of the first reinforcing rib 21 and the second reinforcing rib 22 are connected by a strap 23. Multiple reinforcing rib groups are provided on the bag wall 11, and these groups are evenly distributed along the bag wall 11. "Multiple" refers to three or more groups. Preferably, four reinforcing rib groups are provided.

[0027] The first reinforcing rib 21 and the second reinforcing rib 22 are distributed longitudinally along the bag wall 11 and are directly connected at the top by the sling 23 to form the main load-bearing path of "sling 23-reinforcing rib". This avoids the stitching being subjected to stress alone, increases the reliability of the hanging ear 24 during hoisting, and prevents the hanging ear 24 from breaking at the connection with the bag body.

[0028] Example 4: In order to solve the pressure problem of the bag bottom 13 and the bag body, this example provides a drawstring container bag. Based on any of the above examples, the bag bottom 13 is provided with a pressure-bearing rib 26; the bottom of the first reinforcing rib 21 of any reinforcing rib group is connected to the bottom of the second reinforcing rib 22 of the next reinforcing rib group through the pressure-bearing rib 26.

[0029] The bottom bearing rib 26 is laterally connected to the bottom of adjacent reinforcing rib groups, strengthening the compressive strength of the bag bottom 13 and preventing collapse. The bearing rib 26, in conjunction with the lifting lugs, forms a topological structure, namely, a continuous connection of the first reinforcing rib 21, the bearing rib 26 of this group, the second reinforcing rib 22 of the next group, the lifting strap 23, and the first reinforcing rib 21. This forms a closed-loop mesh skeleton, upgrading the bag bottom 13 from a traditional planar bearing structure to a three-dimensional truss structure. The lifting strap 23, reinforcing ribs, and bearing rib 26 are continuously stitched together with a single piece of material, eliminating stress concentration points found in traditional multi-component seams and enhancing the compressive strength of the bag wall 11 and bag bottom 13.

[0030] A burst-proof rib 25 is provided in the middle of the bag wall 11; the burst-proof rib 25 is arranged laterally around the bag wall 11. The burst-proof rib 25 in the middle, which laterally surrounds the bag wall 11, resists the lateral expansion force of the material and inhibits bulging deformation.

[0031] Optionally, the reinforcing ribs and explosion-proof ribs 25 are made of high-strength polypropylene tape or laminated woven tape.

[0032] Optionally, the reinforcing ribs and explosion-proof ribs 25 are connected to the bag body by hot-melt composite or high-frequency welding to avoid weakening caused by seam friction.

[0033] Example 5: To address the problem of excessive air pressure inside the bag during filling, causing material leakage through the gap between the discharge pipe and the inlet 3, this example provides a drawstring container bag based on any of the above embodiments. The bag top is provided with a pressure relief port; a pressure relief component 4 is provided on the pressure relief port; the pressure relief component 4 connects the inside and outside of the bag; the pressure relief component 4 includes a dustproof box and a filter sponge 43; the dustproof box includes an upper cover plate 41 and a lower cover plate 42; the upper cover plate 41 and the lower cover plate 42 are interlocked; the filter sponge 43 is placed inside the dustproof box; the lower cover plate 42 is provided with a vent hole 423; the upper cover plate 41 is provided with an exhaust hole; the upper cover plate 41 is also provided with a sealing cover 413; the sealing cover 413 is movably connected to the upper cover plate 41; the sealing cover 413 is used to seal the exhaust hole.

[0034] The lower cover plate 42 includes a base plate 421 and a retaining wall 422; the retaining wall 422 is disposed on the base plate 421 and protrudes upward; the retaining wall 422 encloses and divides the base plate 421 into an inner area and an outer edge; the inner area of ​​the base plate 421 and the retaining wall 422 form a filter cavity for accommodating the filter sponge 43; the vent 423 is disposed in the inner area of ​​the base plate 421; the retaining wall 422 is provided with a first retaining edge 4221. The upper cover plate 41 includes an outer frame 411; the vent is located on the inner side of the outer frame 411; a sealing plate 412 is also provided on the inner side of the outer frame 411; the sealing plate 412 covers the inner side of the outer frame 411, and the unsealed part is the vent; a sliding groove is provided on the inner side of the outer frame 411; the two sides of the sealing cover 413 are located in the sliding groove; the sealing cover 413 slides along the sliding groove to seal or open the vent; a second locking edge 4111 is provided below the outer frame 411; the first locking edge 4221 and the second locking edge 4111 cooperate with each other to lock the upper cover plate 41 and the lower cover plate 42 together.

[0035] The vent holes 423 in the inner area of ​​the lower cover plate 42 and the bottom plate 421 allow gas to pass through, while the filter sponge 43 intercepts dust and prevents material from spilling out. The upper cover plate 41 and the lower cover plate 42 are connected by a first snap-fit ​​edge 4221 and a second snap-fit ​​edge 4111, without the need for bolts or adhesives, supporting quick disassembly and replacement of the filter sponge 43, and facilitating quick installation.

[0036] A sealing wall 424 is provided on the base plate 421; the sealing wall 424 is connected to the retaining wall 422 and is set along the inner side of the retaining wall 422; the height of the sealing wall 424 is lower than that of the retaining wall 422; the filter sponge 43 is provided with a protrusion adapted to the sealing wall 424. After the filter sponge 43 is placed into the filter chamber, the lower end of the protrusion abuts against the upper end of the sealing wall 424; when the gas in the bag rises from the gap between the filter sponge 43 and the sealing wall 424 to the protrusion, it is blocked by the protrusion, and the airflow still needs to pass through the filter sponge 43 to be discharged, thus enhancing the filtration effect. In this embodiment, an annular sealing wall 424 + sponge protrusion is added to the filter chamber to form a labyrinthine airflow path, forcing the dust-laden gas to pass through the sponge body rather than the edge gaps.

[0037] The inner side of the outer frame 411 is provided with a limiting edge; after the upper cover plate 41 and the lower cover plate 42 are engaged, the lower part of the limiting edge abuts against the top of the retaining wall 422. The top of the retaining wall 422 is provided with a first sealing strip.

[0038] A second sealing strip is provided near the vent on the sealing plate 412; the second sealing strip is located between the sealing plate 412 and the sealing cover 413. When the sealing cover 413 closes the vent, the second sealing strip between the sealing plate 412 and the sealing cover 413 can prevent moisture in the air from entering the bag, and can also prevent cement from leaking out of the bag during transportation.

[0039] A fourth sealing strip is provided on the outer edge. The fourth sealing strip is made of an elastic material, such as rubber. After the upper cover plate 41 and the lower cover plate 42 are engaged, the outer frame 411 of the upper cover plate 41 abuts against the sealing strip of the bag body; the sealing strip and the fourth sealing strip are pressed together, which can prevent the material in the bag from leaking out through the gap between the lower cover plate 42 and the sealing strip.

[0040] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A bunged flexitank characterised by: Includes the bag body, which includes the bag wall, bag bottom, and bag top; The bag walls are closed to form a barrel-shaped structure; the bag bottom and bag top are respectively located at the bottom and top of the barrel-shaped bag walls; the bag walls are also equipped with lifting straps; and the bag top is equipped with a feed inlet. The feed inlet includes an inner bag opening and an outer bag opening; the tops of the inner bag opening and the outer bag opening are connected, and the bottoms are connected to the bag body; an inner rope channel is provided at the waist of the inner bag opening; an inner rope opening is provided on the inner rope channel; an outer channel opening is provided on the outer bag; the outer channel opening corresponds to the position of the inner rope opening; an inner drawstring is provided inside the inner rope channel; the end of the inner drawstring extends out from the inner rope opening and is exposed through the outer channel opening; an outer rope channel is provided at the waist of the outer bag opening; an outer rope opening is provided on the outer rope channel; an outer drawstring is provided inside the outer rope channel; the end of the outer drawstring extends out from the inner rope opening.

2. A spout bag according to claim 1, wherein: The inner rope channel has two inner rope openings, and two inner ropes are installed inside the inner rope channel; the ends of the two inner ropes extend out from the two inner rope openings respectively. There are two outer rope openings on the outer rope path, and two outer binding ropes are installed inside the outer rope path; the ends of the two outer binding ropes extend out from the two outer rope openings respectively.

3. A spout-pouch according to claim 2, characterized in that: The inlet is located at the edge of the top of the bag; the top of the bag is inclined towards the inlet around its perimeter; the bag wall is provided with hanging ears; the hanging ears and the inlet are positioned corresponding to the center of the bag body.

4. A spout-pouch according to claim 3, wherein: The bag wall is provided with a group of reinforcing ribs, which includes a first reinforcing rib and a second reinforcing rib; the tops of the first reinforcing rib and the second reinforcing rib are connected by a sling; multiple groups of the reinforcing ribs are provided on the bag wall; the multiple groups of the reinforcing ribs are evenly distributed along the bag wall.

5. A spout-pouch according to claim 4, characterized in that: The bottom of the bag is provided with a pressure-bearing rib; the bottom of the first reinforcing rib of any group of reinforcing ribs is connected to the bottom of the second reinforcing rib of the next group of reinforcing ribs through the pressure-bearing rib; the middle of the bag wall is provided with an explosion-proof rib; the explosion-proof rib is arranged horizontally around the bag wall.

6. A spout sack according to claim 1, wherein: The bag has a pressure relief vent at the top; a pressure relief assembly is installed on the pressure relief vent; the pressure relief assembly connects the inside and outside of the bag. The pressure relief assembly includes a dust box and a filter sponge; the dust box includes an upper cover plate and a lower cover plate; the upper cover plate and the lower cover plate are snap-fitted together; the filter sponge is placed inside the dust box; the lower cover plate is provided with vent holes; the upper cover plate is provided with exhaust holes; the upper cover plate is also provided with a sealing cover; the sealing cover is movably connected to the upper cover plate; the sealing cover is used to block the exhaust holes.

7. A spout-pouch according to claim 6, characterized in that: The lower cover plate includes a bottom plate and a retaining wall; the retaining wall is disposed on the bottom plate and protrudes upward; the retaining wall encloses and divides the bottom plate into an inner area and an outer edge; the inner area of ​​the bottom plate and the retaining wall form a filter cavity for accommodating the filter sponge; the vent is disposed in the inner area of ​​the bottom plate; the retaining wall is provided with a first retaining edge; The upper cover plate includes an outer frame; the vent is located on the inner side of the outer frame; a sealing plate is also provided on the inner side of the outer frame; the sealing plate covers the inner side of the outer frame, and the unsealed part is the vent; a sliding groove is provided on the inner side of the outer frame; the two sides of the sealing cover are located in the sliding groove; the sealing cover slides along the sliding groove to seal or open the vent; a second locking edge is provided at the bottom of the outer frame; the first locking edge and the second locking edge cooperate with each other to lock the upper cover plate and the lower cover plate together.

8. A spout-pouch according to claim 7, characterized in that: A sealing wall is provided on the base plate; the sealing wall is connected to the card wall and is set along the inner side of the card wall; the height of the sealing wall is lower than that of the card wall; the filter sponge is provided with a protrusion adapted to the sealing wall.

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