WO2022111638A1

WO2022111638A1 - Packaging bag that unidirectionally exhausts gas

Info

Publication number: WO2022111638A1
Application number: PCT/CN2021/133558
Authority: WO
Inventors: 孙佳斌; 孙行伦; 孙行航
Original assignee: 孙佳斌; 孙行伦; 孙行航
Priority date: 2020-11-27
Filing date: 2021-11-26
Publication date: 2022-06-02
Also published as: CN112478422B; CN112478422A

Abstract

A packaging bag that unidirectionally exhausts a gas, comprising: a bag body (10), the body being sheet-shaped and provided with an accommodating cavity (10a) for accommodating articles; and pressure relief valves (20), the valves being like membranes, and multiple pressure relief valves (20) being provided on the bag body (10), and the bag body (10) being integrally formed with the pressure relief valves (20). The pressure relief valves (20) each comprise a breakable part (21) having a notch (211) and a one-way exhaust valve film (22) defined on an inner side of the breakable part (21). The bag body (10), the breakable parts (21) and the one-way exhaust valve films (22) are connected, and the one-way exhaust valve films (22) are connected to the bag body (10) at the notch (211) positions. When the internal pressure of the accommodating cavity (10a) reaches a threshold, the breakable parts (21) break, and the one-way exhaust valve films (22) are opened outwards to release the internal pressure. The packaging bag can effectively reduce the possibility of contamination of articles within the packaging bag caused by impurities carried by external gas.

Description

One-way exhaust bag

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese Patent Application No. 202011360523.9 filed on November 27, 2020, entitled "One-way Exhaust Packaging Bag", the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of packaging technology, in particular to a one-way exhaust packaging bag.

Background technique

In daily life, packaging bags have a wide range of applications. For example, packaging bags such as flour bags, cement bags or feed bags. In the environment of mass production and transportation, the items after production and packaging need to be stacked in a limited space such as a factory building or a vehicle. However, the bag has bi-directional breathability. During stacking, the gas inside the bag can be squeezed out. During the transition, the packaging bag will suck in gas from the outside. When the packaging bag inhales impurity gas from the outside, it will cause pollution to the items in the packaging bag.

SUMMARY OF THE INVENTION

The present application provides a one-way exhaust packaging bag, which can effectively reduce the possibility of impurities carried by external air and cause pollution to the articles in the packaging bag.

In a first aspect, the present application proposes a one-way exhaust packaging bag, which includes:

The bag body is in the shape of a sheet, and the bag body has an accommodating cavity for accommodating articles;

The pressure relief valve is in the shape of a diaphragm. A plurality of pressure relief valves are arranged on the bag body. The bag body and the pressure relief valve are integrally formed. The pressure relief valve includes a breakable part with a gap and a one-way exhaust defined inside the breakable part The valve membrane, the bag body, the breakable part and the one-way exhaust valve membrane are connected, and the one-way exhaust valve membrane is connected with the bag body at the notch position. When the internal pressure of the accommodating cavity reaches a threshold value, the breakable part is broken and the single-way exhaust valve membrane is broken. The vent valve membrane opens outward to relieve internal pressure.

In some embodiments of one aspect of the present application, the breakable portion extends continuously, and a gap is formed between two ends of the breakable portion.

In some embodiments of an aspect of the present application, the breakable portion is an arc-shaped structure, and the central angle corresponding to the breakable portion ranges from 180° to 270°.

Optionally, the number of pressure relief valves provided per square meter on the bag body is 9,000 to 11,625.

In some embodiments of one aspect of the present application, the bag body includes a stacking surface and a side surface, the side surface is located outside the stacking surface, and the number of pressure relief valves provided on the side surface is greater than the number of pressure relief valves provided on the stacking surface quantity.

In some embodiments of one aspect of the present application, the size of the pressure relief valve provided on the side surface gradually increases in the direction away from the stacking surface.

In some embodiments of one aspect of the present application, the number of pressure relief valves per square meter on the side surface is greater than the number of pressure relief valves per square meter on the stacking surface.

In some embodiments of one aspect of the present application, the packaging bag further includes an inner lining layer, the inner lining layer is disposed on the inner surface of the bag body, and the inner lining layer is a breathable film layer.

Optionally, the inner lining layer is provided with via holes corresponding to the one-way exhaust valve membrane.

In some embodiments of one aspect of the present application, the material of the bag body and the pressure relief valve is selected from plastics.

In some embodiments of an aspect of the present application, the one-way vent valve membrane is disposed protruding from the outer surface of the bag body.

The packaging bag according to the embodiment of the present application includes a bag body and a pressure relief valve. When the bag body is packed with items, and the bag body is squeezed by an external force to increase the internal pressure to a threshold value, the breakable part of the pressure relief valve will be broken, and the one-way exhaust valve membrane will be turned up and opened to discharge. Internal pressure of the bag body. When the internal pressure of the bag body is lower than the threshold value, the one-way exhaust valve membrane will re-seal the ventilation holes on the bag body, thereby effectively preventing the outside air from entering the inside of the bag body and reducing the impact of impurities carried by the outside air on the bag body. The potential for contamination of the item.

Description of drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

1 is a schematic structural diagram of a packaging bag according to an embodiment of the present application;

Fig. 2 is the enlarged view of A place in Fig. 1;

3 is a partial cross-sectional structural schematic diagram of a packaging bag in an embodiment of the present application;

FIG. 4 is a schematic diagram of the open state of the one-way exhaust valve membrane in the embodiment shown in FIG. 3;

5 is a schematic diagram of a stacking state of a plurality of packaging bags in an embodiment of the present application;

6 is a cross-sectional structural schematic diagram of a packaging bag in an embodiment of the present application;

7 is a partial cross-sectional structural schematic diagram of a packaging bag in another embodiment of the present application;

FIG. 8 is a schematic diagram of the open state of the one-way exhaust valve membrane in the embodiment shown in FIG. 7 .

In the drawings, the drawings are not necessarily drawn to actual scale.

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application by way of example, but should not be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

In the description of this application, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present application. Application restrictions. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance. "Vertical" is not strictly vertical, but within the allowable range of errors. "Parallel" is not strictly parallel, but within the allowable range of errors.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

Orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a Detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

After noticing that the packaging bag has the problem of inhaling foreign impurity gas, which leads to the contamination of the articles packaged in the packaging bag, the applicant conducts research and analysis on various structures of the packaging bag. Applicants have found that the packaging bag has bi-directional air permeable pores, which results in air exhaust from the pores when the internal pressure of the packaging bag increases, and suction from the outside through the pores when the internal pressure decreases.

Based on the above problems discovered by the applicant, the applicant improves the structure of the packaging bag, and the embodiments of the present application are further described below.

For better understanding of the present application, the embodiments of the present application are described below with reference to FIGS. 1 to 8 .

Referring to FIG. 1 , an embodiment of the present application provides a one-way exhaust packaging bag 1 . The packaging bag 1 can be used to hold articles 99 in the form of powder, granules or blocks. The packaging bag 1 itself is a flexible structure and has good arbitrary deformation ability.

Referring to FIG. 2 and FIG. 3 , the packaging bag 1 of the embodiment of the present application includes a bag body 10 and a pressure relief valve 20 . The bag body 10 has a sheet shape. The bag body 10 may be formed using sheet stock machining. The produced bag body 10 is also in sheet shape as a whole. The bag body 10 has a accommodating cavity 10 a for accommodating the article 99 . After the articles 99 are placed in the accommodating cavity 10a, the opening of the bag body 10 can be sealed. The pressure relief valve 20 is a diaphragm type structure with a predetermined thickness. The number of relief valves 20 is plural. A plurality of pressure relief valves 20 are provided on the bag body 10 . The bag body 10 and the pressure relief valve 20 may be integrally formed. Here, integral molding refers to processing and manufacturing the bag body 10 and the pressure relief valve 20 on the same blank, and the bag body 10 and the pressure relief valve 20 are connected. The pressure relief valve 20 includes a breakable portion 21 having a notch 211 and a one-way exhaust valve membrane 22 defined inside the breakable portion 21 . The bag body 10 , the breakable portion 21 and the one-way exhaust valve membrane 22 are connected. The breakable portion 21 separates the bag body 10 and the one-way vent valve membrane 22 . The breakable portion 21 has a predetermined breaking stress. The breaking stress of the breakable portion 21 is smaller than the breaking stress of the bag body 10 and also smaller than the breaking stress of the one-way exhaust valve membrane 22 . The one-way exhaust valve membrane 22 is connected to the bag body 10 at the position of the notch 211 .

Referring to FIG. 4 , when the internal pressure of the accommodating chamber 10a reaches a threshold value, the breakable portion 21 is broken and the one-way exhaust valve membrane 22 is opened outward, and the accommodating chamber 10a is communicated with the outside to relieve the internal pressure. After the breakable portion 21 is broken, the portion of the one-way exhaust valve membrane 22 corresponding to the breakable portion 21 will be separated from the bag body 10 and will no longer be restrained by the bag body 10, so that it will be turned outwards and opened under the action of airflow. However, the one-way exhaust valve film 22 is always connected to the bag body 10 at the position of the notch 211 , so that the one-way exhaust valve film 22 will not fall off from the bag body 10 . Exemplarily, when the internal pressure of the packaging bag 1 reaches a threshold value during stacking, the breakable portion 21 provided thereon will be broken and the one-way exhaust valve membrane 22 will be opened outward to relieve the internal pressure. After the breakable portion 21 is broken and the one-way exhaust valve membrane 22 is opened outward, a vent hole appears on the bag body 10 . When the internal pressure of the packaging bag 1 is reduced, the one-way exhaust valve film 22 will re-contact with the bag body 10 under the action of air flow and cover the ventilation holes on the bag body 10 to prevent external air from entering the packaging bag 1 through the ventilation holes. Exemplarily, the one-way exhaust valve membrane 22 may be structurally designed to cover the entire vent hole. The one-way exhaust valve membrane 22 has a predetermined rigidity to avoid making the one-way exhaust valve membrane 22 too soft, to ensure that the one-way exhaust valve membrane 22 can easily cover the ventilation holes under the action of the external air flow, and to reduce the one-way exhaust valve membrane. 22 The possibility of a large displacement of the position under the air blowing and not covering at least part of the ventilation hole.

The packaging bag 1 of the embodiment of the present application includes a bag body 10 and a pressure relief valve 20 . When the bag body 10 is packed with the articles 99 and the bag body 10 is squeezed by an external force so that the internal pressure increases to a threshold value, the breakable portion 21 of the pressure relief valve 20 will be broken, and the one-way exhaust valve membrane 22 will be outward Turn up to open to relieve the internal pressure of the bag body 10 . After the internal pressure of the bag body 10 is lower than the threshold value, the one-way exhaust valve film 22 will re-seal the ventilation holes on the bag body 10, thereby effectively preventing the outside air from entering the interior of the bag body 10 and reducing the impact of impurities carried by the outside air on the bag body 10. Possibility of contamination from items 99 within bag body 10 .

In some embodiments, as shown in FIG. 2 , the breakable portion 21 may be provided on the outer surface of the bag body 10 . The breakable portion 21 extends continuously. A gap 211 is formed between two opposite ends of the breakable portion 21 . Exemplarily, the contour of the breakable portion 21 may be an elliptical arc shape, a circular arc shape or a broken line shape. Exemplarily, the breakable portion 21 has a circular arc structure, so that under the action of internal pressure, it can be ensured that the force at each position of the breakable portion 21 is relatively balanced, so that the breakable portion 21 is more likely to be broken as a whole. The central angle corresponding to the breakable portion 21 ranges from 180° to 270°.

In some embodiments, the number of pressure relief valves 20 provided per square meter on the bag body 10 is 9000 to 11625, that is, the density of the pressure relief valves 20 ranges from 9000/per square meter to 11625/ Per square meter. When the density of the pressure relief valves 20 is less than 9000 pieces per square meter, the overall exhaust efficiency of all the pressure relief valves 20 is low, which is not conducive to realizing the effect of rapid exhaust, thereby affecting the working efficiency of stacking. When the density of the pressure relief valve 20 is greater than 11625 pieces per square meter, the area of the part of the bag body 10 located between two adjacent pressure relief valves 20 will be small, resulting in low strength, so that the bag body 10 is located in the opposite direction. The part between the two adjacent pressure relief valves 20 or between the breakable part 21 and the bag body 10 is easily torn when subjected to tensile stress, which affects the normal use of the packaging bag 1 .

In some embodiments, as shown in FIG. 5 , the bag body 10 includes a stacking surface 11 and a side surface 12 . The side surfaces 12 are located outside the stacking surface 11 . The number of relief valves 20 provided on the side surface 12 is greater than the number of relief valves 20 provided on the stacking surface 11 . When a plurality of packaging bags 1 are stacked in a vertical direction, the stacking surfaces 11 of two adjacent stacked packaging bags 1 are in contact with each other, and the side surfaces 12 are exposed to the external environment. Since the stacking surfaces 11 of the two adjacent stacked packaging bags 1 are in contact with each other, the pressure relief valve 20 provided on the stacking surfaces 11 is squeezed and may be difficult or impossible to open. At this time, the pressure relief valve 20 provided on the side surface 12 is not pressed or interfered by the adjacent packaging bags 1, so that the pressure relief valve 20 provided on the side surface 12 can work normally. Therefore, the number of pressure relief valves 20 provided on the side surface 12 is greater than the number of pressure relief valves 20 provided on the stacking surface 11, which is beneficial to ensure that during stacking, the packaging bag 1 can better pass through the side surfaces 12. The pressure relief valve 20 realizes one-way exhaust.

In some embodiments, in a direction away from the stacking surface 11 . The size of the relief valve 20 provided on the side surface 12 is gradually increased. The area on the side surface 12 that is farther away from the stacking surface 11 is less likely to be squeezed or interfered by the adjacent packaging bags 1. Therefore, the pressure relief valve 20 provided on the side surface 12 is farther away from the stacking surface 11, and the size is larger. It can be ensured that the overall exhaust volume of the packaging bag 1 per unit time is relatively large, which is beneficial to ensure stable exhaust efficiency.

In some embodiments, the number of pressure relief valves 20 provided per square meter on the side surface 12 is greater than the number of pressure relief valves 20 provided per square meter on the stacking surface 11 , that is, the pressure relief valves provided on the side surface 12 The density of the pressure relief valve 20 on the stacking surface 11 is higher than that of the pressure relief valve 20 on the stacking surface 11 , thereby ensuring that the overall exhaust efficiency of the pressure relief valve 20 on the side surface 12 is higher than that of the pressure relief valve 20 on the stacking surface 11 . When at least part of the pressure relief valve 20 on the stacking surface 11 fails, the packaging bag 1 can be exhausted through the pressure relief valve 20 on the side surface 12 and ensure stable exhaust efficiency.

In some embodiments, as shown in FIG. 6 , the packaging bag 1 further includes an inner liner 30 . The inner lining layer 30 is disposed on the inner surface of the bag body 10 . The inner lining layer 30 is a breathable film layer, which has good gas permeability, which is beneficial to reduce the resistance of gas discharge and ensure smooth exhaust. Via holes corresponding to the one-way exhaust valve film 22 may also be provided on the inner liner 30, so that the gas can directly flow through the via holes. The inner lining layer 30 can improve the strength of the bag body 10, so that the bag body 10 is not easily torn when subjected to external tensile stress. Exemplarily, the material of the inner lining layer 30 may be non-woven fabric.

In some embodiments, the material of the bag body 10 and the pressure relief valve 20 is selected from plastics. For example, polyethylene or polypropylene, etc. Illustratively, using a monolithic sheet blank, the breakable portion 21 may be formed directly on the blank by a hot pressing process.

In some embodiments, the size design of the pressure relief valve 20 requires that after the breakable portion 21 is broken, the diameter of the vent hole formed on the bag body 10 does not allow the items 99 packaged in the packaging bag 1 to escape from the vent hole of the bag body 10 leakage.

In some embodiments, as shown in FIGS. 7 and 8 , the one-way vent valve membrane 22 is disposed protruding from the outer surface of the bag body 10 . The one-way exhaust valve membrane 22 may be in a raised state. The one-way exhaust valve membrane 22 has a top portion 221 and a side portion 222 . The side portion 222 of the one-way exhaust valve membrane 22 is connected to the breakable portion 21 . After the breakable portion 21 is ruptured, the side portion 222 of the one-way exhaust valve membrane 22 can be turned outward relative to the top 221 of the one-way exhaust valve membrane 22, so that the area of the one-way exhaust valve membrane 22 can be increased, The area of the one-way exhaust valve film 22 is made larger than the area of the vent hole formed on the bag body 10 . In this way, when the packaging bag 1 inhales gas from the outside, the one-way exhaust valve film 22 can more easily cover the entire ventilation hole, and further block the outside air from entering the interior of the packaging bag 1 . In addition, the edge of the one-way exhaust valve film 22 has an overlapping area with the bag body 10, so that the one-way exhaust valve film 22 is not easily sucked into the inner side of the packaging bag 1 to cause failure.

In the packaging bag 1 of the embodiment of the present application, a pressure relief valve 20 is provided on the bag body 10 to realize one-way discharge of the gas in the packaging bag 1, and the pressure relief valve 20 blocks the outside air from entering the inside of the packaging bag 1, so that the Without affecting the stacking or transit transportation of the packaging bags 1 , it is beneficial to ensure that the packaging bags 1 do not inhale or less inhale external air, and reduce the possibility of contamination of the items 99 enclosed in the packaging bags 1 due to impurities carried by the external air.

Although the application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the application, particularly, provided that no structural conflict exists , each technical feature mentioned in each embodiment can be combined in any manner. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

A one-way exhaust packaging bag, comprising:

a bag body, in the shape of a sheet, and the bag body has an accommodating cavity for accommodating articles;

The pressure relief valve is in the shape of a diaphragm, a plurality of the pressure relief valves are arranged on the bag body, the bag body and the pressure relief valve are integrally formed, and the pressure relief valve includes a breakable part with a gap and a limit The one-way exhaust valve film on the inner side of the breakable portion, the bag body, the breakable portion and the one-way exhaust valve film are connected, and the one-way exhaust valve film is at the notch position In connection with the bag body, when the internal pressure of the accommodating cavity reaches a threshold value, the breakable portion is ruptured and the one-way vent valve membrane is opened outward to relieve the internal pressure.
The one-way exhaust packaging bag according to claim 1, wherein the breakable portion extends continuously, and the gap is formed between two ends of the breakable portion.
The one-way exhaust packaging bag according to claim 2, wherein the breakable portion is an arc-shaped structure, and the central angle corresponding to the breakable portion ranges from 180° to 270°.
The one-way exhaust packaging bag according to claim 1, wherein the number of the pressure relief valves provided per square meter on the bag body is 9,000 to 11,625.
The one-way exhaust packaging bag according to any one of claims 1 to 4, wherein the bag body includes a stacking surface and a side surface, the side surface is located outside the stacking surface, and the side surface is located outside the stacking surface. The number of the pressure relief valves provided on the surface is greater than the number of the pressure relief valves provided on the stacking surface.
The one-way exhaust packaging bag according to claim 5, wherein the size of the pressure relief valve provided on the side surface gradually increases in a direction away from the stacking surface.
The one-way exhaust packaging bag according to claim 5, wherein the number of the pressure relief valves provided per square meter on the side surface is greater than the pressure relief valve provided per square meter on the stacking surface number of valves.
The one-way exhaust packaging bag according to any one of claims 1 to 4, wherein the packaging bag further comprises an inner lining layer, and the inner lining layer is arranged on the inner surface of the bag body, and the inner lining layer is arranged on the inner surface of the bag body. The backing layer is a breathable film layer.
The one-way exhaust packaging bag according to claim 8, wherein the inner lining layer is provided with through holes corresponding to the one-way exhaust valve film.
The one-way exhaust packaging bag according to any one of claims 1 to 4, wherein the material of the bag body and the pressure relief valve is selected from plastics.
The one-way venting packaging bag according to any one of claims 1 to 4, wherein the one-way venting valve film is disposed protruding from the outer surface of the bag body.