Leakage-proof breathable valve bag

Abstract

The utility model relates to the field of valve bags, in particular to a leakproof breathable valve bag which comprises a bag body, the bag body comprises a bag opening and a bag bottom, outer-layer valve opening paper, inner-layer valve opening paper, an inner reinforcing layer and an outer reinforcing layer are sequentially bonded to the bag opening, the inner reinforcing layer is made of breathable materials, a first bonding area, a second bonding area, a third bonding area and a fourth bonding area are arranged at the bag opening, and the first bonding area, the second bonding area, the third bonding area and the fourth bonding area are arranged on the bag bottom. The first bonding area covers the bag opening, the second bonding area covers the outer valve opening paper, the third bonding area covers the outer valve opening paper and the bag opening, the fourth bonding area covers the bag opening, and the outer valve opening paper, the inner reinforcing layer and the bag opening are located on one side of the fourth bonding area and provided with a non-adhesive area, so that a ventilation channel is formed after the bag opening is folded. The inner reinforcing layer is arranged so that air can be rapidly exhausted from the ventilation channel, after filling is completed, the bag body topples over, internal materials abut against the inner reinforcing layer from the inside, and the outer reinforcing layer and the inner reinforcing layer act jointly so that the ventilation channel can be closed.

Description

Technical Field

[0001] The utility model relates to the field of valve bag industry, in particular to a leak-proof and breathable 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] In the process of using valve bags, the filling method is usually air delivery filling. The powdered material contains a lot of air. The existing valve bags usually have poor air permeability. During the filling process, the air cannot be discharged quickly, and it is easy for the gas to carry the material back from the valve port, polluting the environment and wasting materials. Utility Model Content

[0004] The utility model provides a leak-proof and breathable valve bag to solve the technical problems in the prior art that the valve bag has poor air permeability, is prone to gas carrying materials back out of the valve port, pollutes the environment, and wastes materials.

[0005] In order to solve the above problems, the leak-proof and breathable valve bag provided by the utility model adopts the following technical scheme: it includes a bag body, the bag body includes a bag opening and a bag bottom, the outer valve mouth paper, the inner valve mouth paper, the inner reinforcement layer and the outer 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 shape, the inner reinforcement layer is set to be a breathable material, and the bag opening is provided with a first bonding area, a second bonding area, a third bonding area and a fourth bonding area, the first bonding area covers the bag opening, the second bonding area covers the outer valve mouth paper, the third bonding area covers the outer valve mouth paper and the bag opening, the fourth bonding area covers the bag opening, the outer valve mouth paper and the inner reinforcement layer, and a glue-free area is set on one side of the bag opening located at the fourth bonding area, so that a breathable channel is formed after the bag opening is folded, and the breathable channel is interconnected with the inner cavity of the bag body.

[0006] Furthermore, the width of the first bonding area is smaller than the width of the bag opening, the third bonding area is configured as an inverted U-shaped structure, and the third bonding area and the outer layer of valve mouth paper are enclosed to form a feeding portion.

[0007] Furthermore, the fourth bonding area includes two groups, and the two groups of fourth bonding areas are respectively located on both sides of the wide fold line of the bag bottom.

[0008] Furthermore, after the bag opening is folded inwardly, a fifth bonding area for bonding the outer reinforcing layer is provided on one end surface away from the bag bottom, and the fifth bonding area covers the bag opening.

[0009] Furthermore, the inner valve paper is configured as a barrel-shaped structure, and the inner valve paper is communicated with the inner cavity of the bag body through the feed portion.

[0010] Furthermore, the material of the inner reinforcement layer is non-woven fabric.

[0011] Furthermore, the material of the outer reinforcement layer is kraft paper.

[0012] The leak-proof breathable valve bag provided by the utility model has the following beneficial effects: during the filling process of the valve bag, the filling machine nozzle extends into the bag body from the inner valve mouth paper to start filling, the bag body is inflated, and the arrangement of the inner reinforcement layer enables air to be quickly discharged from the breathable channel, and can prevent the pressure in the valve bag from being too high, and can effectively prevent the gas from carrying the material back from the valve mouth to pollute the environment and waste the material; after the filling is completed, the bag body is tilted, and the internal material supports the inner reinforcement layer from the inside, and the outer reinforcement layer and the inner reinforcement layer work together to close the breathable channel, which can effectively prevent the occurrence of deterioration caused by the growth of microorganisms during storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the structure of the leak-proof breathable valve bag of the utility model;

[0015] Figure 2 It is a schematic diagram of the explosion structure of the leak-proof breathable valve bag of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the first bonding area of ​​the leak-proof breathable valve bag of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the second bonding area of ​​the leak-proof breathable valve bag of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the third bonding area of ​​the leak-proof breathable valve bag of the utility model;

[0019] Figure 6 It is a structural schematic diagram of the fourth bonding area and the non-adhesive area of ​​the leak-proof breathable valve bag of the utility model;

[0020] Figure 7 It is a schematic structural diagram of the fifth bonding area of ​​the leak-proof breathable valve bag of the utility model.

[0021] Description of reference numerals:

[0022] 1. Bag body; 11. Bag opening; 111. Outer valve paper; 112. Inner valve paper; 113. Inner reinforcement layer; 114. Outer reinforcement layer; 1141. Fifth bonding area; 115. First bonding area; 116. Second bonding area; 117. Third bonding area; 1171. Feeding part; 118. Fourth bonding area; 119. No-glue area; 101. Bag bottom width fold line; 102. Breathable channel; 12. Bag bottom. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0026] The leak-proof breathable valve bag provided by the utility model is as follows Figures 1 to 7 As shown, the bag body 1 includes a bag opening 11 and a bag bottom 12. The bag opening 11 is sequentially bonded with an outer valve paper 111, an inner valve paper 112, an inner reinforcement layer 113, and an outer reinforcement layer 114. The bag opening 11 is folded inwardly along the width direction of the bag bottom 12 to form a composite shape. The inner reinforcement layer 113 is set to a breathable material. The bag opening 11 is provided with a first bonding area 115, a second bonding area 116, a third bonding area 117, and a fourth bonding area 118. The first adhesive area 115 covers the bag opening 11, the second adhesive area 116 covers the outer valve mouth paper, the third adhesive area 117 covers the outer valve mouth paper 111 and the bag opening 11, and the fourth adhesive area 118 covers the bag opening 11, the outer valve mouth paper 111, and the inner reinforcement layer 113. The bag opening 11 is provided with a non-glue area 119 on one side of the fourth adhesive area 118, so that the bag opening 11 is folded to form a breathable channel 102, and the breathable channel 102 is connected to the inner cavity of the bag body 1.

[0027] By adopting the above technical solution, during the filling process of the valve bag, the filling machine nozzle extends from the inner valve mouth paper 112 into the bag body 1 to start filling. The bag body 1 is inflated, and the setting of the inner reinforcement layer 113 allows the air to be quickly discharged from the air permeable channel 102, and can prevent the pressure in the valve bag from being too high, and can effectively prevent the gas from carrying the material back from the valve mouth to pollute the environment and waste materials. After the filling is completed, the bag body 1 is tilted, and the internal material supports the inner reinforcement layer 113 from the inside, and the outer reinforcement layer 114 and the inner reinforcement layer 113 work together to close the air permeable channel 102, which can effectively prevent the occurrence of deterioration caused by the growth of microorganisms during storage.

[0028] In this embodiment, the width of the first bonding area 115 is smaller than the width of the bag opening 11 , and the third bonding area 117 is configured as an inverted U-shaped structure. The third bonding area 117 and the outer valve paper 111 are enclosed to form a feed portion 1171 to ensure the filling of the material in the bag body 1 .

[0029] In this embodiment, the fourth bonding area 118 includes two groups, and the two groups of fourth bonding areas 118 are respectively located on both sides of the bag bottom width fold line 101. In this embodiment, a non-glue area 119 is reserved on one side of one group of the fourth bonding areas 118. When the bag opening 11 is folded inward, the side of the bag opening 11 on which the non-glue area 119 is reserved is folded first. The non-glue area 119 corresponds to the inner reinforcement layer 113, and the other side of the bag opening 11 covers the side on which the non-glue area 119 is reserved.

[0030] In this embodiment, after the bag opening 11 is folded inward, a fifth bonding area 1141 for bonding the external reinforcement layer 114 is provided on one end surface away from the bag bottom 12. The fifth bonding area 1141 covers the bag opening 11, and the external reinforcement layer 114 covers the folded bag opening 11. In this embodiment, the material of the external reinforcement layer 114 is kraft paper, which ensures the firmness of the valve bag and can effectively prevent the occurrence of deterioration caused by the growth of microorganisms during storage.

[0031] In this embodiment, the inner valve paper 112 is configured as a barrel-shaped structure, and the inner valve paper 112 is connected to the inner cavity of the bag body 1 through the feed portion 1171 to ensure the filling of the material.

[0032] In this embodiment, the inner reinforcement layer 113 is made of non-woven fabric, which ensures the air permeability of the inner reinforcement layer 113 and can prevent material leakage. The non-woven fabric can pass food grade certification, is safe and reliable, and can be bonded by gluing equipment during bonding.

[0033] 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.

[0034] 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. Leak-proof breathable valve bag, characterized in that: The invention comprises a bag body, which comprises a bag opening and a bag bottom. An outer valve mouth paper, an inner valve mouth paper, an inner reinforcement layer and an outer 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 synthetic shape. The inner reinforcement layer is set to be a breathable material. A first bonding area, a second bonding area, a third bonding area and a fourth bonding area are set at the bag opening. The first bonding area covers the bag opening, the second bonding area covers the outer valve mouth paper, the third bonding area covers the outer valve mouth paper and the bag opening, and the fourth bonding area covers the bag opening, the outer valve mouth paper and the inner reinforcement layer. A glue-free area is set on one side of the bag opening located at the fourth bonding area, so that a breathable channel is formed after the bag opening is folded, and the breathable channel is connected with the inner cavity of the bag body.

2. The leakproof breathable valve bag according to claim 1, characterized in that: The width of the first bonding area is smaller than the width of the bag opening, the third bonding area is set to an inverted U-shaped structure, and the third bonding area and the outer layer of valve mouth paper are surrounded to form a feeding part.

3. The leakproof breathable valve bag according to claim 2, characterized in that: The fourth bonding area includes two groups, and the two groups of fourth bonding areas are respectively located on both sides of the wide fold line of the bag bottom.

4. The leakproof breathable valve bag according to claim 1, characterized in that: After the bag opening is folded inwards, a fifth bonding area for bonding the outer reinforcing layer is arranged on one end surface away from the bag bottom, and the fifth bonding area covers the bag opening.

5. The leakproof breathable valve bag according to claim 1, characterized in that: The inner valve paper is arranged in a barrel-shaped structure, and the inner valve paper is communicated with the inner cavity of the bag body through the feeding part.

6. The leakproof breathable valve bag according to claim 1, characterized in that: The inner reinforcement layer is made of non-woven fabric.

7. The leakproof breathable valve bag according to claim 1, characterized in that: The material of the outer reinforcement layer is kraft paper.

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