Multi-overlapping leakage-proof valve bag
By bonding multiple layers of materials at the valve pocket and stacking them, the problem of insufficient leakage protection in traditional valve pockets is solved, and better sealing and material protection effect is achieved.
Patent Information
- Application Number
- CN202420550182.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-03-20
AI Technical Summary
Traditional valve pockets are insufficiently leak-proof when filling nano-scale powdered materials, which makes the materials easily contact with external air, which leads to agglomeration or deterioration.
A multi-overlapping anti-leakage valve pocket is designed, which forms a valve pocket with better sealing by bonding the valve pocket gasket, valve pocket paper and inner reinforcement layer in turn at the bag mouth, and folding inward along the width direction of the bottom of the bag to form a valve pocket with better sealing.
This design significantly improves the sealing of the valve pocket, effectively isolates the internal and external air, prevents the material from contacting the air, and slowly evacuates the gas in the bag through the breathability of the valve pocket itself, thereby effectively preventing the material from agglomerating or deteriorating.
Smart Images
Figure CN222794174U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of valve bag industry, in particular to a multi-layered anti-leakage valve bag. Background Art
[0002] Valve bags are a more environmentally friendly packaging bag. They are filled into cubes through special filling equipment to fill materials from the top or bottom valve port. They are mainly used for powdered or granular solid materials and flexible items.
[0003] When filling nano-scale powdered materials, the leak-proofness of traditional valve bags usually cannot meet customer requirements. After filling, the materials are easily exposed to the outside air, which can easily lead to material agglomeration and deterioration. Utility Model Content
[0004] The utility model provides a multi-layered leak-proof valve bag to solve the technical problems that the leak-proofness of the traditional valve bag in the prior art cannot meet the customer's requirements and the material is easily exposed to the outside air after filling.
[0005] To solve the above problems, the multi-layered leak-proof valve bag provided by the utility model adopts the following technical scheme: it includes a bag opening and a bag bottom, a valve mouth gasket, a valve mouth paper, and an inner reinforcement layer are sequentially bonded to the bag opening, the bag opening is folded inward along the width direction of the bag bottom to form a synthesis, a first bonding area for bonding the valve mouth gasket is provided on the bag opening, a second bonding area for bonding the valve mouth paper is provided on the valve mouth gasket, a third bonding area for bonding the inner reinforcement layer is provided on the valve mouth, and the inner reinforcement layer is provided with a fourth bonding area for folding the bag opening to form, the third bonding area covers the bag opening and the valve mouth gasket, the fourth bonding area covers the bag opening, the valve mouth gasket, and the inner reinforcement layer, the horizontal central axes of the valve mouth gasket, the valve mouth paper, and the inner reinforcement layer all deviate from the horizontal central axis of the bag opening, and the horizontal central axes of the valve mouth gasket, the valve mouth paper, and the inner reinforcement layer deviate from the horizontal central axis of the bag opening in the same direction.
[0006] Furthermore, the first bonding area, the second bonding area, the third bonding area, and the fourth bonding area are all provided with hollow portions.
[0007] Furthermore, the third bonding area at the bag mouth and the valve mouth gasket are enclosed to form a feed part, and the third bonding area includes a first bonding part, a second bonding part, and a third bonding part. The first bonding part and the second bonding part are respectively located at two ends of the third bonding part, and the first bonding part and the second bonding part are respectively located on both sides of two groups of bag bottom width fold lines, and the feed part is located between the two groups of bag bottom width fold lines.
[0008] Furthermore, the third bonding area is configured as a U-shaped structure.
[0009] Furthermore, the fourth bonding area includes two groups, the two groups of fourth bonding areas are respectively located on both sides of the two groups of bag bottom width fold lines, wherein the fourth bonding area on the side deviating from the valve port gasket is provided with an extension portion, and the extension portion covers the valve port gasket.
[0010] Furthermore, after the bag opening is folded inwards, an end surface away from the bag bottom is bonded to the outer reinforcing layer.
[0011] The beneficial effects of the multi-layered leak-proof valve bag provided by the utility model are as follows: the valve mouth gasket, valve mouth paper and inner reinforcement layer are pasted at the bag mouth in an offset manner, which is convenient for the valve mouth to be overlapped and formed, and can make the sealing of the valve bag better, and can make the valve bag effectively isolate the air inside and outside, and prevent the material from contacting the air. The gas in the bag can only be slowly emptied through the air permeability of the valve bag itself, thereby effectively preventing the material from agglomerating and deteriorating. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:
[0013] Figure 1 It is a schematic diagram of the structure of the multi-layered anti-leakage valve bag of the utility model;
[0014] Figure 2 It is a schematic diagram of the bag opening and the first bonding area structure of the multi-layered leak-proof valve bag of the utility model;
[0015] Figure 3 It is a schematic diagram of the bag opening, valve opening gasket and second bonding area structure of the multi-layered leak-proof valve bag of the utility model;
[0016] Figure 4 The utility model is a schematic diagram of the bag opening, valve opening gasket, valve opening paper and the third bonding area structure of the multi-layered leak-proof valve bag.
[0017] Description of reference numerals:
[0018] 1. Bag opening; 2. Valve opening gasket; 3. Valve opening paper; 4. Inner reinforcement layer; 5. First bonding area; 6. Second bonding area; 7. Third bonding area; 71. Feeding part; 8. Fourth bonding area; 81. Extension part; 9. Hollow part; 10. Bag bottom width fold line. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0020] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.
[0021] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.
[0022] The utility model provides a multi-layered anti-leakage valve bag, such as Figures 1 to 4 As shown, it includes a bag opening 1 and a bag bottom, and is characterized in that a valve mouth gasket 2, a valve mouth paper 3, and an inner reinforcement layer 4 are sequentially bonded to the bag opening 1, the bag opening 1 is folded inwardly along the width direction of the bag bottom to form a synthesis, a first bonding area 5 for bonding the valve mouth gasket 2 is provided on the bag opening 1, a second bonding area 6 for bonding the valve mouth paper 3 is provided on the valve mouth gasket 2, a third bonding area 7 for bonding the inner reinforcement layer 4 is provided on the valve mouth, and the inner reinforcement layer 4 is provided with a fourth bonding area 8 for folding the bag opening 1 to form, the third bonding area 7 covers the bag opening 1 and the valve mouth gasket 2, the fourth bonding area 8 covers the bag opening 1, the valve mouth gasket 2, and the inner reinforcement layer 4, the horizontal central axes of the valve mouth gasket 2, the valve mouth paper 3, and the inner reinforcement layer 4 all deviate from the horizontal central axis of the bag opening 1, and the horizontal central axes of the valve mouth gasket 2, the valve mouth paper 3, and the inner reinforcement layer 4 deviate from the horizontal central axis of the bag opening 1 in the same direction.
[0023] By adopting the above technical scheme, the valve mouth gasket 2, the valve mouth paper 3, and the inner reinforcement layer 4 are pasted at the bag mouth 1 in an offset manner, which is convenient for the valve mouth to be overlapped and formed, and can make the sealing of the valve bag better, and can make the valve bag effectively isolate the air inside and outside, and prevent the material from contacting the air. The gas in the bag can only be slowly emptied through the air permeability of the valve bag itself, thereby effectively preventing the material from agglomerating and deteriorating.
[0024] In this embodiment, the first bonding area 5, the second bonding area 6, the third bonding area 7, and the fourth bonding area 8 are all provided with a hollow portion 9. The control of the glue area can ensure the strength of the valve bag while avoiding the situation where the bonding time is long due to excessive moisture.
[0025] In this embodiment, the third bonding area 7 at the bag mouth 1 and the valve mouth gasket 2 are enclosed to form a feed portion 71. The third bonding area 7 includes a first bonding portion, a second bonding portion, and a third bonding portion. The first bonding portion and the second bonding portion are respectively located at both ends of the third bonding portion, and the first bonding portion and the second bonding portion are respectively located on both sides of the two groups of bag bottom width fold lines 10. The feed portion 71 is located between the two groups of bag bottom width fold lines 10. In this embodiment, the third bonding area 7 is set to a U-shaped structure to ensure the feeding of materials. The valve mouth gasket 2 and the valve mouth paper 3 are overlapped at the upper and lower ends to form a valve mouth shape. The material passes through the valve mouth and the feed portion 71 in turn and enters the valve bag.
[0026] In this embodiment, Figure 4 As shown, the inner reinforcing layer 4 is bonded to the right end of the valve mouth paper 3, and the inner reinforcing layer 4 completely covers the mouth of the bag 1 to ensure the sealing of the valve bag.
[0027] In this embodiment, the fourth bonding area 8 includes two groups, and the two groups of fourth bonding areas 8 are respectively located on both sides of the two groups of bag bottom width fold lines 10, wherein the fourth bonding area 8 deviating from the valve mouth gasket 2 is provided with an extension portion 81, and the extension portion 81 covers the valve mouth gasket 2. When the bag mouth 1 is folded, the side without the extension portion 81 is folded first, and the bag mouth 1, the valve mouth paper 3, the valve mouth gasket 2, and the inner reinforcement layer 4 are all folded along the bag bottom width fold line 10. After the side of the bag mouth 1 with the extension portion 81 is folded, it is bonded to the end surface of the bag mouth 1 away from the bag bottom on the first folded side, so as to ensure the sealing of the bag mouth 1 after being folded.
[0028] In this embodiment, after the bag opening 1 is folded inwards, an external reinforcement layer (not shown) is bonded to the end surface away from the bag bottom, so as to further enhance the sealing performance of the bag opening 1 after being folded and formed.
[0029] In this embodiment, the outer reinforcement layer and the inner reinforcement layer 4 are both made of kraft paper.
[0030] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.
[0031] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.
Claims
1. A multi-layered leak-proof valve bag, including a bag opening and a bag bottom, characterized in that: A valve mouth gasket, valve mouth paper and an inner reinforcement layer are sequentially bonded to the bag opening, the bag opening is folded inwardly along the width direction of the bag bottom to form a composite shape, a first bonding area for bonding the valve mouth gasket is provided on the bag opening, a second bonding area for bonding the valve mouth paper is provided on the valve mouth gasket, a third bonding area for bonding the inner reinforcement layer is provided on the valve mouth, and a fourth bonding area for folding the bag opening to form the inner reinforcement layer, the third bonding area covers the bag opening and the valve mouth gasket, the fourth bonding area covers the bag opening, the valve mouth gasket and the inner reinforcement layer, the horizontal central axes of the valve mouth gasket, the valve mouth paper and the inner reinforcement layer all deviate from the horizontal central axis of the bag opening, and the horizontal central axes of the valve mouth gasket, the valve mouth paper and the inner reinforcement layer deviate from the horizontal central axis of the bag opening in the same direction.
2. The multi-layered anti-leakage valve bag according to claim 1, characterized in that: The first bonding area, the second bonding area, the third bonding area and the fourth bonding area are all provided with hollow parts.
3. The multi-layered anti-leakage valve bag according to claim 1, characterized in that: The third bonding area at the bag mouth and the valve mouth gasket are enclosed to form a feeding part. The third bonding area includes a first bonding part, a second bonding part, and a third bonding part. The first bonding part and the second bonding part are respectively located at two ends of the third bonding part, and the first bonding part and the second bonding part are respectively located on both sides of two groups of bag bottom width fold lines, and the feeding part is located between the two groups of bag bottom width fold lines.
4. The multi-layered anti-leakage valve bag according to claim 3, characterized in that: The third bonding area is configured as a U-shaped structure.
5. The multi-layered anti-leakage valve bag according to claim 1, characterized in that: The fourth bonding area includes two groups, which are respectively located on both sides of the two groups of bag bottom width fold lines, wherein the fourth bonding area on the side deviating from the valve port gasket is provided with an extension portion, which covers the valve port gasket.
6. The multi-layered leak-proof valve bag according to claim 1, characterized in that: After the bag opening is folded inward, the end surface away from the bag bottom is bonded with the outer reinforcing layer.