Self-inflating buffer bag

Abstract

The invention relates to the technical field of cushion packaging, in particular to a self-inflating cushion bag which comprises a bag body (divided into a first bag cavity, a second bag cavity, a third bag cavity and a fourth bag cavity, and the third bag cavity is divided into a first containing cavity and a second containing cavity) and a solid containing bag (comprising a third containing cavity and a protruding part formed through extension, and the protruding part is fixed to the second containing cavity). The first bag cavity and the second bag cavity can be communicated through extrusion so that the contents can be in contact with each other to generate gas, and gas pressure can be used for extruding and communicating the first, second and fourth bag cavities; the first containing cavity and the second containing cavity can be communicated through extrusion, so that the second liquid material is sucked and permeated by the protruding part and gradually makes contact with the second solid material to slowly produce gas. The self-inflating buffer bag can achieve self-inflating through simple pressing, is low in cost and good in buffer effect, can supplement air through simple pressing, and is suitable for objects needing long-distance transportation or transfer.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and in particular to a self-inflating cushioning bag. Background Art

[0002] With the booming development of e-commerce, express delivery has become an indispensable part of people's lives. People's demand for express delivery is growing day by day. They not only require express delivery to be delivered quickly and on time, but also expect the items to be intact during transportation. This puts higher requirements on the cushioning packaging materials used for items.

[0003] Inflatable cushion bags are a widely used cushioning packaging material. They form an air cushion by inflating, which can effectively absorb and disperse external impact and protect the items in the package from damage. They have the advantages of low cost, light weight, good cushioning effect, and high space utilization. The most common inflation method is mechanical inflation, which requires the use of specific inflation equipment and is carried out in a fixed place, resulting in high production and transportation costs.

[0004] In addition, the current inflatable cushioning bags are formed by one-time inflation, and the inflation volume gradually decreases due to natural leakage during long-distance transportation, thereby affecting the cushioning performance. Therefore, they are not suitable for goods that need to be transported over long distances. Summary of the invention

[0005] Based on this, one or more embodiments of the present application provide a self-inflating cushion bag, which can be inflated without the need for special equipment and auxiliary tools such as power supply, is easy to operate, and can provide long-term cushioning, and is suitable for items that need to be transported over long distances.

[0006] The technical solution of this application includes:

[0007] A self-inflating cushion bag, comprising a bag body and a solid containing bag; the bag body is divided into a sealed first bag cavity, a second bag cavity, a third bag cavity and a fourth bag cavity by a compression seal;

[0008] The first bag cavity and the second bag cavity are respectively used to accommodate a first liquid material and a first solid material that can react to generate gas when in contact with each other; the compression seal between the first bag cavity and the second bag cavity can be released by squeezing the first bag cavity to achieve communication between the first bag cavity and the second bag cavity; the air pressure generated when the first bag cavity and the second bag cavity are communicated can squeeze and release the compression seal between the first bag cavity or the second bag cavity and the fourth bag cavity to achieve communication between the first bag cavity or the second bag cavity and the fourth bag cavity;

[0009] The third bag cavity is divided into a sealed first accommodating cavity and a second accommodating cavity by a compression seal; the solid accommodating bag includes a third accommodating cavity and a protrusion extending from the third accommodating cavity; the protrusion is fixedly arranged in the second accommodating cavity; the first accommodating cavity and the third accommodating cavity are respectively used to accommodate a second liquid material and a second solid material that can contact each other and react to produce gas; the compression seal between the first accommodating cavity and the second accommodating cavity can be released by squeezing the first accommodating cavity to realize the communication between the first accommodating cavity and the second accommodating cavity; when the first accommodating cavity and the second accommodating cavity are communicated, the second liquid material can penetrate into the third accommodating cavity through the attraction of the protrusion.

[0010] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions:

[0011] (1) The width of the press-sealed portion between the first bag cavity and the second bag cavity is L1, the width of the press-sealed portion between the first bag cavity and the fourth bag cavity is L2, and the width of the press-sealed portion between the second bag cavity and the fourth bag cavity is L3; L1<L2, L1<L3;

[0012] (2) The strength of the press-sealed portion between the first bag cavity and the second bag cavity is Q1, the strength of the press-sealed portion between the first bag cavity and the fourth bag cavity is Q2, and the strength of the press-sealed portion between the second bag cavity and the fourth bag cavity is Q3; Q1<Q2, Q1<Q3.

[0013] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions: (a1) 0.8 mm ≤ L1 ≤ 1.2 mm, (a2) 2.5 mm ≤ L2 ≤ 3.5 mm, (a3) ​​2.5 mm ≤ L3 ≤ 3.5 mm; and / or

[0014] The self-inflating cushion bag satisfies at least one of the following conditions: (b1) 3N / 15mm≤Q1≤5N / 15mm, (b2) 8N / 15mm≤Q2≤10N / 15mm, (b3) 8N / 15mm≤Q2≤10N / 15mm.

[0015] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions:

[0016] (1) A portion of the press-sealed portion between the first bag cavity and the second bag cavity is fully pressed to form a first fully fitted connection section, and another portion of the press-sealed portion is point pressed to form a first multi-point contact connection section;

[0017] (2) The press-sealed portion between the first bag cavity and the fourth bag cavity is point pressed to form a second multi-point contact connection section;

[0018] (3) The press-sealed portion between the second bag cavity and the fourth bag cavity is formed by point pressing to form a third multi-point contact connection section.

[0019] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions:

[0020] (1) The width of the press-sealed portion between the first accommodating cavity and the second accommodating cavity is L4, and the width of the press-sealed portion between the third bag cavity and the fourth bag cavity is L5; L4<L5;

[0021] (2) The strength of the compression seal between the first accommodating cavity and the second accommodating cavity is Q4, and the strength between the third bag cavity and the fourth bag cavity is Q5; Q4<Q5.

[0022] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions: (c1) 0.8 mm ≤ L4 ≤ 1.2 mm, (c2) L5 ≥ 7 mm; and / or

[0023] The self-inflating cushion bag satisfies at least one of the following conditions: (d1) 3N / 15mm≤Q4≤5N / 15mm, (d2) 13N / 15mm≤Q5≤15N / 15mm.

[0024] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions:

[0025] (1) The compression seal portion between the first accommodating cavity and the second accommodating cavity is point-pressed to form a fourth multi-point contact connection section;

[0026] (2) The press-sealed portion between the third bag cavity and the fourth bag cavity is fully pressed to form a second fully fitted connection section.

[0027] In some embodiments, the self-inflating cushion bag satisfies at least one of the following conditions:

[0028] (1) The compression seal portion between the first accommodating cavity and the second accommodating cavity protrudes toward the interior of the third bag cavity;

[0029] (2) The edge of the protruding portion contacts the compression seal portion between the first accommodating cavity and the second accommodating cavity.

[0030] In some embodiments, the edge of the bag body is provided with an edge banding strip, and the edge banding strip satisfies at least one of the following conditions:

[0031] (e1) The width of the edge banding is L0, L0 ≥ 7 mm;

[0032] (e2) The strength of the edge banding is Q0, Q0 ≥ 20N / 15mm.

[0033] In some embodiments, the bag body includes a bag cavity, a portion of the bag cavity is separated by the corresponding press-sealed part to form the first bag cavity, a portion is separated by the corresponding press-sealed part to form the second bag cavity, a portion is separated by the corresponding press-sealed part to form the third bag cavity, and the remaining portion of the bag cavity forms the fourth bag cavity; wherein the first bag cavity and the second bag cavity are adjacent, and the first bag cavity and the second bag cavity are respectively separated from the third bag cavity by a portion of the fourth bag cavity; and / or

[0034] An isolation layer is provided between the first bag cavity, the second bag cavity and the fourth bag cavity. The isolation layer can isolate solids and liquids and can pass gas.

[0035] In some embodiments, the first liquid material and the first solid material are respectively a part of a first gas-generating material, and the first gas-generating material comprises, by weight, 4 to 6 parts of citric acid, 8 to 12 parts of sodium bicarbonate, and 15 to 25 parts of water.

[0036] In some embodiments, the weight ratio of the citric acid to the sodium bicarbonate is 1:(1.8-2.2); and / or

[0037] The ratio of the total weight of the citric acid and the sodium bicarbonate to the volume of the water is 15 g: (15-25) mL.

[0038] In some embodiments, the ratio of the weight of the citric acid in the first gas generating material to the volume of the fourth bag cavity is 5 g:4-5 L.

[0039] In some embodiments, the second liquid material and the second solid material are respectively a part of a second gas generating material, and the second gas generating material comprises, by weight, 2 to 4 parts of citric acid, 3 to 5 parts of sodium bicarbonate, 4 to 8 parts of a binder, and 20 to 30 parts of water.

[0040] In some embodiments, the weight ratio of the citric acid to the sodium bicarbonate is 1:(1.3-1.5); and / or

[0041] The ratio of the total weight of the citric acid and the sodium bicarbonate to the volume of the water is 7.3 g: (20-30) mL; and / or

[0042] The ratio of the total weight of the citric acid and the sodium bicarbonate to the weight of the binder is 1:(0.7-0.8).

[0043] In some embodiments, the ratio of the weight of the citric acid in the second gas generating material to the volume of the fourth bag cavity is 3 g:4-5 L.

[0044] In some embodiments, the second solid material includes the binder and at least one of the citric acid and the sodium bicarbonate;

[0045] The second solid material is a powder block, and the preparation method of the powder block comprises the following steps:

[0046] The second solid material is ground and then loaded into a block mold for pressing to obtain the powder block.

[0047] The self-inflating cushion bag of the present application comprises a bag body and a solid containing bag, the bag body comprising a sealed first bag cavity, a second bag cavity, a third bag cavity and a fourth bag cavity separated by a compression seal; wherein the first bag cavity and the second bag cavity are respectively used to contain a first liquid material and a first solid material that can contact each other and react to produce gas, and the compression seal between the first bag cavity and the second bag cavity can be released by squeezing the first bag cavity or the second bag cavity to achieve communication between the first bag cavity and the second bag cavity; the air pressure generated after the first bag cavity and the second bag cavity are communicated can squeeze and release the compression seal between the first bag cavity or the second bag cavity and the fourth bag cavity to achieve communication between the first bag cavity or the second bag cavity and the fourth bag cavity, and based on the above device, the first bag cavity, the second bag cavity and the fourth bag cavity can be completely connected to each other by a single press to form an air cushion, which has a good cushioning effect; at the same time, the third bag cavity is further The solid containing bag is also divided into a sealed first containing chamber and a second containing chamber by a compression seal, and the solid containing bag has a third containing chamber and a protrusion extending from the third containing chamber. The protrusion of the solid containing bag is fixed in the second containing chamber, and the remaining part (i.e., the third containing chamber) is located in the fourth bag chamber. The first containing chamber and the third containing chamber are respectively used to contain a second liquid material and a second solid material that can contact each other and react to produce gas. The compression seal between the first containing chamber and the second containing chamber can be released by squeezing the first containing chamber to achieve communication between the first containing chamber and the second containing chamber. When the first containing chamber and the second containing chamber are connected, the second liquid material can penetrate into the third containing chamber through the attraction of the protrusion, and contact with the second solid material through gradual penetration to slowly react and produce gas, thereby playing a role of slowly replenishing gas, thereby achieving long-term buffering. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1This is a schematic structural diagram of a self-inflating cushion bag according to an embodiment of the present application;

[0050] Figure 2 This is a schematic structural diagram of a self-inflating cushion bag according to an embodiment of the present application;

[0051] Figure 3 A schematic cross-sectional view of an edge sealing strip of a self-inflating cushion bag according to an embodiment of the present application;

[0052] Figure 4 A schematic cross-sectional view of an edge sealing strip of a self-inflating cushion bag according to an embodiment of the present application;

[0053] Figure 5 It is a cross-sectional schematic diagram of a compression seal portion of a self-inflating cushion bag according to an embodiment of the present application;

[0054] Figure 6 It is a cross-sectional schematic diagram of a compression seal portion of a self-inflating cushion bag according to an embodiment of the present application;

[0055] Reference numerals:

[0056] 1-bag body; 11-first bag cavity; 12-second bag cavity; 13-third bag cavity; 131-first accommodating cavity; 132-second accommodating cavity; 14-fourth bag cavity; 101-first plastic film layer, 102-second plastic film layer, 103-side A of the third plastic film layer, 104-side B of the third plastic film layer;

[0057] 2-solid containing bag; 21-third containing cavity; 22-protrusion; 201-side A of the first non-woven cotton fiber layer; 202-side B of the first non-woven cotton fiber layer; 203-side A of the first non-woven PE (or PP) fiber layer; 204-side B of the first non-woven PE (or PP) fiber layer;

[0058] 3-pressure sealing part; 31-first pressure sealing part; 311-first full-fitting connection section, 312-first multi-point contact connection section; 32-second pressure sealing part; 321-second multi-point contact connection section; 33-third pressure sealing part; 331-third multi-point contact connection section; 34-fourth pressure sealing part; 341-fourth multi-point contact connection section; 35-fifth pressure sealing part; 351-second full-fitting connection section; 352-fifth multi-point contact connection section;

[0059] 4-gas-generating material; 41-first liquid material; 42-first solid material; 43-second liquid material; 44-second solid material;

[0060] 5-isolating portion; 50-isolating layer; 501-side A of the first non-woven fabric layer, 502-side B of the second non-woven fabric layer. DETAILED DESCRIPTION

[0061] The present application will be further described below in conjunction with the embodiments and examples. It should be understood that these examples are only used to illustrate the present application and are not intended to limit the scope of the present application. In addition, it should be understood that after reading the content taught in the present application, those skilled in the art may make various changes or modifications to the present application, and these equivalent forms also fall within the protection scope of the claims attached to the present application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0063] the term

[0064] Unless otherwise specified or incompatible herewith, the terms and phrases used herein shall have the following meanings:

[0065] The term "and / or" used in this article includes any one of two or more related listed items, and also includes any and all combinations of related listed items, and the arbitrary and all combinations include any two related listed items, any more related listed items, or all related listed items. It should be noted that when at least three items are connected by at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in this application, the technical solution undoubtedly includes technical solutions that are all connected by "logical and", and undoubtedly includes technical solutions that are all connected by "logical or". For example, "A and / or B" includes three parallel solutions of A, B and A+B. For example, the technical solution of "A, and / or, B, and / or, C, and / or, D" includes any one of A, B, C, and D (that is, the technical solution that is all connected by "logical OR"), and also includes any and all combinations of A, B, C, and D, that is, the combination of any two or any three of A, B, C, and D, and also includes the combination of four of A, B, C, and D (that is, the technical solution that is all connected by "logical AND").

[0066] Herein, "preferred", "preferable", "better", etc. are only used to describe implementation methods or examples with better effects. It should be understood that they do not constitute limitations on the scope of protection of this application.

[0067] In the present application, "further", "further", "particularly" and the like are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of the present application.

[0068] In this application, the terms "first", "second", "third", "fourth", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0069] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0070] In this application, when it comes to numerical intervals (i.e., numerical ranges), unless otherwise specified, the optional numerical distribution is considered continuous within the above numerical interval, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical range, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to integers within the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be combined. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges included therein.

[0071] In the present application, weight may be μg, mg, g, kg or other mass units known in the chemical industry.

[0072] One or more embodiments of the present application provide a self-inflating cushion bag, which can be inflated without the need for special equipment and auxiliary tools such as power supply, is easy to operate, and can achieve long-term cushioning, and is suitable for items that need to be transported or transferred over long distances.

[0073] The self-inflating cushion bag of the embodiment of the present application comprises a bag body and a solid containing bag; the bag body comprises a sealed first bag cavity, a second bag cavity, a third bag cavity and a fourth bag cavity separated by a compression seal;

[0074] The first bag cavity and the second bag cavity are respectively used to accommodate a first liquid material and a first solid material that can react to generate gas when in contact with each other; the compression seal between the first bag cavity and the second bag cavity can be released by squeezing the first bag cavity to achieve communication between the first bag cavity and the second bag cavity; the gas pressure generated when the first bag cavity and the second bag cavity are communicated can squeeze and release the compression seal between the first bag cavity or the second bag cavity and the fourth bag cavity to achieve communication between the first bag cavity or the second bag cavity and the fourth bag cavity;

[0075] The third bag cavity includes a sealed first accommodating cavity and a second accommodating cavity separated by a compression seal; the solid accommodating bag includes a third accommodating cavity and a protrusion extending from the third accommodating cavity; the protrusion is fixedly arranged in the second accommodating cavity; the first accommodating cavity and the third accommodating cavity are respectively used to accommodate a second liquid material and a second solid material that can contact each other and react to produce gas; the compression seal between the first accommodating cavity and the second accommodating cavity can be released by squeezing the first accommodating cavity to achieve communication between the first accommodating cavity and the second accommodating cavity; when the first accommodating cavity and the second accommodating cavity are communicated, the second liquid material can penetrate into the third accommodating cavity through the attraction of the protrusion.

[0076] In the self-inflating cushion bag of the embodiment of the present application, although the air pressure generated when the first bag cavity and the second bag cavity are connected can squeeze and release the sealed portion between the first bag cavity or the second bag cavity and the fourth bag cavity, thereby realizing the communication between the first bag cavity or the second bag cavity and the fourth bag cavity, it cannot release the sealed portion between the third bag cavity and the fourth bag cavity. This is because, on the one hand, the fourth bag cavity disperses the air pressure, resulting in a lower pressure, and on the other hand, the sealed portion between the third bag cavity and the fourth bag cavity has a higher strength and cannot be released by squeezing.

[0077] In some embodiments, the width of the press-sealed portion between the first bag cavity and the second bag cavity is L1, the width of the press-sealed portion between the first bag cavity and the fourth bag cavity is L2, and the width of the press-sealed portion between the second bag cavity and the fourth bag cavity is L3; L1<L2, L1<L3. Further, L1, L2 and L3 satisfy at least one of the following conditions: (a1) 0.8mm≤L1≤1.2mm, (a2) 2.5mm≤L2≤3.5mm, (a3) ​​2.5mm≤L3≤3.5mm.

[0078] In some embodiments, the strength of the press-sealed portion between the first bag cavity and the second bag cavity is Q1, the strength of the press-sealed portion between the first bag cavity and the fourth bag cavity is Q2, and the strength of the press-sealed portion between the second bag cavity and the fourth bag cavity is Q3; Q1<Q2, Q1<Q3. Further, Q1, Q2 and Q3 satisfy at least one of the following conditions: (b1) 3N / 15mm≤Q1≤5N / 15mm, (b2) 8N / 15mm≤Q2≤10N / 15mm, (b3) 8N / 15mm≤Q2≤10N / 15mm.

[0079] In some embodiments, a portion of the press-sealed portion between the first bag cavity and the second bag cavity is fully pressed to form a first fully fitted connection section, and another portion of the press-sealed portion is point pressed to form a first multi-point contact connection section. Further, the press-sealed portion between the first bag cavity and the fourth bag cavity is point pressed to form a second multi-point contact connection section. Further, L1<L2 and / or Q1<Q2.

[0080] In this embodiment, by setting the compression seal to different fitting forms and different strengths, it can be ensured that when squeezing the first bag cavity, the compression seal between the first bag cavity and the second bag cavity can be released first, and at the same time, the compression will not cause the release between the first bag cavity and the fourth bag cavity.

[0081] In some embodiments, the compression seal portion between the second bag cavity and the fourth bag cavity is formed by point compression to form a third multi-point contact connection section. Further, L1<L3 and / or Q1<Q3.

[0082] In the present application, both "full-fit connection" and "multi-point contact connection" are fully sealed connections, which can block gas or liquid. The difference is that the sealing strength of the contact surface of the "full-fit connection" is higher and the strength is more uniform, while in the contact surface of the "multi-point contact connection", multiple point positions form a dot matrix with higher sealing strength, and the sealing strength of the remaining positions is lower. These point positions are small protrusions made by the pressure sealing mold, and the above-mentioned sealing strength difference can be achieved by adjusting the heat sealing process parameters.

[0083] In the present application, when describing the strength of a certain pressure-sealed portion, it usually refers to the minimum release strength of the pressure-sealed portion. For example, in some embodiments, a portion of the pressure-sealed portion between the first bag cavity and the second bag cavity is fully pressed to form a first fully fitted connection section, and another portion of the position is point pressed to form a first multi-point contact connection section. It can be understood that since the strength of the first multi-point contact connection section is lower than that of the first fully fitted connection section, when the pressure-sealed portion between the first bag cavity and the second bag cavity is released by squeezing, it only needs to release the first multi-point contact connection section to achieve the connection between the first bag cavity and the second bag cavity. Therefore, when describing the strength of the pressure-sealed portion between the first bag cavity and the second bag cavity as Q1, it means that the strength of the first multi-point contact connection section is Q1.

[0084] In the self-inflating cushion bag of the embodiment of the present application, after the compression seal between the first accommodating chamber (one of the sealed chambers formed by the third bag chamber being separated by the compression seal) and the second accommodating chamber (the other sealed chamber formed by the third bag chamber being separated by the compression seal), the second liquid material in the first accommodating chamber can fill the entire third bag chamber but cannot further flow into the fourth bag chamber. Since the protrusion of the solid accommodating bag is fixedly arranged in the second accommodating chamber of the third bag chamber, it can contact the second liquid material and attract the second liquid material to penetrate into the third accommodating chamber (a part of the solid accommodating bag, located in the fourth bag chamber), thereby achieving contact between the second liquid material and the second solid material.

[0085] The protrusion of the solid containing bag in the embodiment of the present application is formed by extending from the third containing cavity, and the protrusion is fixed in the second containing cavity (one of the sealed cavities formed by separating the third bag cavity by the compression sealing part), which means that the position of the third containing cavity is fixed relative to the third bag cavity, ensuring that the second liquid material can contact the second solid material to generate gas after being absorbed and infiltrated.

[0086] In this embodiment, the area between the protruding portion of the solid containing bag and the third containing cavity is separated by the compression seal between the third bag cavity and the fourth bag cavity, forming a closed third containing cavity.

[0087] In some embodiments, in order to achieve the above-mentioned effect that the third bag cavity is always sealed but the second liquid material is permeable (the second liquid material in the first bag cavity can fill the entire third bag cavity but cannot further flow into the fourth bag cavity, and the second liquid material can penetrate into the third bag cavity through the attraction of the protrusion), the solid container bag adopts a multi-layer composite layer structure.

[0088] In this embodiment, since the second liquid material is slowly infiltrated by the attraction of the protrusion, it can be understood that the second liquid material requires a long time to completely penetrate and fully contact the second solid material. Therefore, the process of the second liquid material and the second solid material contacting to react and produce gas takes a long time and the gas production rate is slow, so the effect of slow gas replenishment can be achieved.

[0089] In some embodiments, the second solid material includes a binder and at least one of citric acid and sodium bicarbonate;

[0090] The second solid material is a powder block, and the preparation method of the powder block comprises the following steps:

[0091] The second solid material is ground and then loaded into a block mold for compression to obtain a powder block.

[0092] Optionally, the pressing pressure may be 15 kg to 25 kg, and the pressing time may be 4 s to 6 s.

[0093] In this embodiment, since the binder is an inert material with binding ability, a dense powder block structure can be formed by grinding and dispersing the second solid material containing the binder evenly and then pressing it into a powder block, which can effectively reduce the reaction rate.

[0094] Preferably, the second solid material includes at least 40% of a binder, which can effectively reduce the reaction rate without affecting the normal gas replenishment function.

[0095] In some embodiments, the width of the press-sealed portion between the first accommodating cavity and the second accommodating cavity is L4, and the width of the press-sealed portion between the third bag cavity and the fourth bag cavity is L5; L4<L5. Further, L4 and L5 satisfy at least one of the following conditions: (c1) 0.8 mm ≤ L4 ≤ 1.2 mm, (c2) L5 ≥ 7 mm.

[0096] In some embodiments, the strength of the compression seal between the first accommodating cavity and the second accommodating cavity is Q4, and the strength between the third bag cavity and the fourth bag cavity is Q5; Q4<Q5. Further, Q4 and Q5 satisfy at least one of the following conditions: (d1) 3N / 15mm≤Q4≤5N / 15mm, (d2) 13N / 15mm≤Q5≤15N / 15mm.

[0097] In some embodiments, the compression seal between the first accommodating cavity and the second accommodating cavity adopts point compression to form a fourth multi-point contact connection section, and the compression seal between the third bag cavity and the fourth bag cavity adopts full compression to form a second full-fit connection section. Further, L4<L5 and / or Q4<Q5.

[0098] In some embodiments, the compression seal portion between the first accommodating cavity and the second accommodating cavity protrudes toward the inside of the third bag cavity, and the edge of the protruding portion contacts the compression seal portion between the first accommodating cavity and the second accommodating cavity.

[0099] In this embodiment, after the compression seal between the first accommodating cavity and the second accommodating cavity is released, the edge of the protruding portion can be in more complete contact with the second liquid material, so that the second liquid material can be better absorbed and penetrated.

[0100] In some embodiments, edge sealing strips are provided at the edges of the bag body to achieve sealing of the entire bag body.

[0101] In some embodiments, the width of the edge banding strip is L0, and L0 ≥ 7 mm.

[0102] In some embodiments, the strength of the edge banding strip is Q0, where Q0≥20N / 15mm.

[0103] In some embodiments, the bag body includes a bag cavity, a portion of which is separated by a corresponding press-sealed part to form a first bag cavity, a portion is separated by a corresponding press-sealed part to form a second bag cavity, a portion is separated by a corresponding press-sealed part to form a third bag cavity, and the remaining portion of the bag cavity forms a fourth bag cavity; wherein the first bag cavity and the second bag cavity are adjacent, and the first bag cavity and the second bag cavity are respectively separated from the third bag cavity by a portion of the fourth bag cavity.

[0104] In some embodiments, an isolation layer is provided between the first bag cavity, the second bag cavity and the fourth bag cavity, and the isolation layer can isolate solids and liquids and can pass gas.

[0105] In some embodiments, in order to achieve the effect that the above-mentioned isolation layer can isolate solids and liquids and can allow gas to pass through, the bag body adopts a multi-layer composite layer structure.

[0106] In the present application, the first bag cavity and the second bag cavity are used to accommodate a first liquid material and a first solid material, respectively. It can be understood that the first liquid material and the first solid material can respectively exist stably when they are not in contact. Only when the first bag cavity and the second bag cavity are connected and the first liquid material and the first solid material are in contact with each other can they react to produce gas.

[0107] In some embodiments, the first liquid material at least includes a reaction solvent (such as water, etc.), and the reaction solvent is fluid, so squeezing the first bag cavity can conveniently apply pressure to the compression seal between the first bag cavity and the second bag cavity to achieve release.

[0108] In some embodiments, the first liquid material and the first solid material constitute the first gas-generating material, and the first gas-generating material includes water, citric acid and sodium bicarbonate. In this embodiment, the first liquid material is water, and the first solid material is a mixture of citric acid and sodium bicarbonate, or the first liquid material is an aqueous solution of citric acid, and the first solid material is sodium bicarbonate, or the first liquid material is an aqueous solution of sodium bicarbonate, and the first solid material is citric acid, and other cases are not listed one by one.

[0109] In some embodiments, the first gas generating material includes 4-6 parts of citric acid, 8-12 parts of sodium bicarbonate and 15-25 parts of water in parts by weight.

[0110] In some embodiments, the weight ratio of citric acid to sodium bicarbonate is 1:(1.8-2.2); and / or

[0111] The ratio of the total weight of citric acid and sodium bicarbonate to the volume of water is 15g:(15~25)mL.

[0112] In the present application, the first accommodating chamber and the third accommodating chamber are used to accommodate a second liquid material and a second solid material, respectively. It can be understood that the second liquid material and the second solid material can respectively exist stably when they are not in contact. Only the first accommodating chamber and the second accommodating chamber are connected, and the second liquid material is attracted and infiltrated into the third accommodating chamber by the protrusion and contacts with the second solid material before reacting to produce gas.

[0113] In some embodiments, the second liquid material at least includes a reaction solvent (such as water, etc.), and the reaction solvent is fluid, so squeezing the first accommodating cavity can conveniently apply pressure to the compression seal between the first accommodating cavity and the second accommodating cavity to achieve release.

[0114] In some embodiments, the second liquid material and the second solid material constitute the second gas-generating material, and the second gas-generating material includes water, citric acid, sodium bicarbonate and a binder. In this embodiment, the second solid includes a binder, and the remaining components can be arbitrarily combined as long as they meet the above requirements, for example, the second liquid material is water, the second solid material is a mixture of citric acid, sodium bicarbonate and a binder, or the second liquid material is an aqueous solution of citric acid, the second solid material is a mixture of sodium bicarbonate and a binder, or the second liquid material is an aqueous solution of sodium bicarbonate, the second solid material is a mixture of citric acid and a binder, and other situations are not given one by one.

[0115] In some embodiments, the second gas generating material includes, by weight, 2 to 4 parts of citric acid, 3 to 5 parts of sodium bicarbonate, 4 to 8 parts of a binder, and 20 to 30 parts of water.

[0116] In some embodiments, the weight ratio of citric acid to sodium bicarbonate is 1:(1.3-1.5); and / or

[0117] The ratio of the total weight of citric acid and sodium bicarbonate to the volume of water is 7.3 g: (20-30) mL; and / or

[0118] The ratio of the total weight of citric acid and sodium bicarbonate to the weight of the binder is 1:(0.7~0.8).

[0119] In some embodiments, the ratio of the weight of citric acid in the first gas generating material to the volume of the fourth bag cavity is 5 g:4-5 L.

[0120] In some embodiments, the ratio of the weight of citric acid in the second gas generating material to the volume of the fourth bag cavity is 3 g:4-5 L.

[0121] The following are some specific embodiments.

[0122] For experimental parameters not specified in the following specific embodiments, reference is made to the instructions given in the present application document, and reference may also be made to experimental manuals in the art or other experimental methods known in the art, or to experimental conditions recommended by manufacturers.

[0123] The raw materials and reagents involved in the following specific examples can be obtained from commercial sources, or can be prepared by those skilled in the art according to known methods.

[0124] Example 1

[0125] This embodiment provides a self-inflating cushion bag of the present application:

[0126] like Figures 1 to 4As shown, a self-inflating cushion bag comprises a bag body 1 and a solid containing bag 2; the bag body 1 is divided into a first bag cavity 11, a second bag cavity 12, a third bag cavity 13 and a fourth bag cavity 14 by a press-sealing portion 3; the third bag cavity 13 is divided into a first containing cavity 131 and a second containing cavity 132 by the press-sealing portion 3. The solid containing bag 2 comprises a third containing cavity 22 and a protrusion 21 extending from the third containing cavity.

[0127] like Figure 1 , 3 As shown, the first press-seal portion 31 between the first bag cavity 11 and the second bag cavity 12 includes a first fully-fitting connection section 311 and a first multi-point contact connection section 312, the second press-seal portion 32 between the first bag cavity 11 and the fourth bag cavity 14 includes a second multi-point contact connection section 321, the third press-seal portion 33 between the second bag cavity 12 and the fourth bag cavity 14 includes a third multi-point contact connection section 331, and the fifth press-seal portion 35 between the third bag cavity 13 and the fourth bag cavity 14 includes a second fully-fitting connection section 351 and a fifth multi-point contact connection section 352.

[0128] like Figure 1 , 4 As shown, the fourth press-sealed portion 34 between the first accommodating cavity 131 and the second accommodating cavity 132 includes a fourth multi-point contact connection section 341 .

[0129] like Figure 1 , 2 As shown in Figures 5 and 6, the first bag cavity 11 and the second bag cavity 12 are respectively used to accommodate a first liquid material 41 and a first solid material 42 that can react to each other and produce gas; the first accommodating cavity 131 and the third accommodating cavity 132 are respectively used to accommodate a second liquid material 43 and a second solid material 44 that can react to each other and produce gas.

[0130] like Figure 1 , 6 As shown ( Figure 6 The first liquid material 41 and the second liquid material 42 are not marked in the figure. The first bag cavity 11, the second bag cavity 12 and the fourth bag cavity 14 are provided with a separation portion 5, and the separation portion 5 is composed of a separation layer 50. The cross section of the edge band of the bag body 1 at the edge provided with the separation layer 50 is as shown in FIG. Figure 6As shown in the A-A' cross-sectional view, it is a multi-layer composite layer, including a first plastic film layer 101, an A surface 501 of a first non-woven fabric layer, an A surface 103 of a third plastic film layer, a B surface 104 of a third plastic film layer, a B surface 502 of a first non-woven fabric layer and a second plastic film layer 102; based on the above structure, the following is a method for making the self-inflating cushion bag of this embodiment: a first liquid material 41 is filled between the A surface 103 of the third plastic film layer and the B surface 104 of the third plastic film layer, and a first bag cavity 11 is formed by pressure sealing, and a first solid material 42 is filled between the A surface 501 of the first composite non-woven fabric layer and the B surface 502 of the first composite non-woven fabric layer, and a second bag cavity 12 is formed by pressure sealing.

[0131] like Figure 1 , 3 As shown in FIGS. 4 and 6, the fifth multi-point contact connection section 352 in the fifth press-sealed portion 35 between the third bag cavity 13 and the fourth bag cavity 14 is also used to separate the protruding portion 21 of the solid containing bag 2 and the third containing cavity 22 in this structure, and its cross-sectional view is as shown in FIG. Figure 6 As shown in the BB' cross-sectional view, it is a multi-layer composite layer, including a first plastic film layer 101, an A surface 201 of a first non-woven cotton fiber layer, an A surface 203 of a first non-woven PE (or PP) fiber layer, a B surface 204 of a first non-woven PE (or PP) fiber layer, a B surface 202 of a first non-woven cotton fiber layer, and a second plastic film layer 102; Based on the above structure, the following is a method for making a self-inflating cushion bag of this embodiment: take a fiber layer-PE (or PP) fiber layer composite non-woven cotton, fold it and seal the edges on both sides to form a bag structure with one end open (the inner side of the bag structure is a composite non-woven PE (or PP) The second solid material is loaded into the bag, pressed into a block, and the edges are cut to form a protrusion to obtain a solid containing bag 2. The solid containing bag 2 is loaded into the bag body 1, and then a fifth press-sealed portion 35 is formed by press-sealing (which also serves to fix the protrusion in the third bag cavity 13), and a fourth press-sealed portion 34 is formed by press-sealing along the edge of the protrusion. After the second liquid material is loaded between the first composite plastic film layer 101 and the second composite plastic film layer 102, an edge sealing strip is formed by press-sealing to form a third bag cavity 13.

[0132] In this embodiment, the bag body 1 is 245 mm long and 180 mm wide, and is made of PA / PE material. The size of the first bag cavity 11 is 58.5 mm long and 47.0 mm wide, the size of the second bag cavity 12 is 47 mm (square), the size of the third bag cavity 13 is 58.5 mm long and 47.0 mm wide, and the size of the solid material bag is 52 mm long and 43 mm wide. The width of the edge band of the bag body 1 is 7 mm, and the strength of the edge band Q0 ≥ 20 N / 15 mm.

[0133] The width of the first press-seal portion 31 is 1 mm, the strength of the first fully-fitting connection section 311 is 9N / 15 mm, and the strength of the first multi-point contact connection section 312 is 4N / 15 mm; the width of the second press-seal portion 32 is 3 mm; the strength of the second multi-point contact connection section 321 is 9N / 15 mm; the width of the third press-seal portion 33 is 3 mm; the strength of the third multi-point contact connection section 331 is 9N / 15 mm; the width of the fourth press-seal portion 34 is 1 mm; the strength of the fourth multi-point contact connection section 341 is 4N / 15 mm; the width of the fifth press-seal portion 35 is 7 mm; the strength of the second fully-fitting connection section 351 is ≥20N / 15 mm; the strength of the fifth multi-point contact connection section 352 is 15N / 15 mm.

[0134] 2. Selection of gas-generating materials

[0135] The first gas-generating material was prepared according to Table 1 and Table 2, and loaded into different self-inflating cushion bags of the same batch and model, with water in the first bag cavity and citric acid and sodium bicarbonate in the second bag cavity. After squeezing and breaking the seals in the first bag cavity and the second bag cavity of each inflatable cushion bag, the gas production results were observed, and the results are shown in Table 1 and Table 2.

[0136] Table 1 Citric acid and sodium bicarbonate as gas generating materials

[0137]

[0138] Table 2 Acetic acid and sodium bicarbonate as gas generating materials

[0139]

[0140] From the comparison between Table 1 and Table 2, it can be seen that: when citric acid and sodium bicarbonate are used as gas-generating materials, they can react quickly to generate gas to expand the membrane bag to a suitable size when the amount of material is small; while using acetic acid and sodium bicarbonate as gas-generating materials requires more materials and a longer reaction time, and there is a pungent odor.

[0141] Therefore, the formula of the first gas-generating material is: 5g citric acid and 10g sodium bicarbonate, combined with 20g water.

[0142] The second gas-generating material was prepared according to Tables 3 and 4, and loaded into different self-inflating cushion bags of the same batch and model. The third bag cavity was filled with water, and the solid material bag was filled with powder blocks. The preparation method of the powder blocks was as follows: citric acid, sodium bicarbonate and adhesive were mixed and put into a 2-liang grinder for grinding for 10 seconds, the powder was taken out and weighed about half the weight of water, and put into a mold, and put into an experimental powder press with a force of 20 kg. After maintaining the pressure for 5 seconds, it was pressed into a powder block of 52 mm × 43 mm × 5.5 mm.

[0143] After the seal between the third bag cavity and the fourth bag cavity of each inflatable cushion bag was squeezed and broken, the gas production result was observed. The results are shown in Tables 3 and 4.

[0144] Table 3 Citric acid, sodium bicarbonate and talcum powder as the second gas generating material

[0145]

[0146] Table 4 Citric acid, sodium bicarbonate and mica as the second gas generating material

[0147]

[0148] From the comparison between Table 3 and Table 4, it can be seen that: using citric acid, sodium bicarbonate and talcum powder as gas-generating materials, with the same material dosage, can react more slowly to generate gas to replenish the gas in the membrane bag.

[0149] Therefore, the formula of the second gas-generating material is: 7g of citric acid, 10g of sodium bicarbonate and 13g of adhesive are mixed, and 13g is taken out and used with 25g of water.

[0150] All documents mentioned in this application are cited as references in this application, just as each document is cited as reference separately. Unless they conflict with the application purpose and / or technical solution of this application, the cited documents involved in this application are cited with all contents and all purposes. When the cited documents are involved in this application, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When the cited documents are involved in this application, the examples and preferred methods of the cited relevant technical features can also be incorporated into this application as references, but are limited to the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, the present application shall prevail or be modified adaptively according to the description of this application.

[0151] The technical features of the above-mentioned implementation modes and examples can be combined in any appropriate manner. To make the description concise, not all possible combinations of the technical features in the above-mentioned implementation modes and examples are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0152] The above-described embodiments only express several implementation methods of the present application, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for those of ordinary skill in the art, without departing from the concept of the present application, several variations and improvements can also be made, which all belong to the protection scope of the present application. In addition, it should be understood that after reading the above-mentioned teaching content of the present application, those skilled in the art can make various changes or modifications to the present application, and the equivalent forms obtained also fall within the protection scope of the present application. It should also be understood that the technical solutions obtained by those skilled in the art on the basis of the technical solutions provided in the present application through logical analysis, reasoning or limited experiments are all within the protection scope of the claims attached to the present application. Therefore, the protection scope of the patent of the present application shall be based on the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A self-inflating cushion bag, characterized in that: It includes a bag body and a solid containing bag; The bag body is divided into a sealed first bag cavity, a second bag cavity, a third bag cavity and a fourth bag cavity by a compression seal portion; The first bag cavity and the second bag cavity are respectively used to accommodate a first liquid material and a first solid material that can react and generate gas when in contact with each other; The compression seal between the first bag cavity and the second bag cavity can be released by squeezing the first bag cavity to achieve communication between the first bag cavity and the second bag cavity; When the first bag cavity and the second bag cavity are connected, the air pressure generated can squeeze and release the sealed portion between the first bag cavity or the second bag cavity and the fourth bag cavity to achieve the connection between the first bag cavity or the second bag cavity and the fourth bag cavity; The third bag cavity is divided into a sealed first accommodating cavity and a second accommodating cavity by a compression seal; the solid accommodating bag includes a third accommodating cavity and a protrusion extending from the third accommodating cavity; the protrusion is fixedly arranged in the second accommodating cavity; the first accommodating cavity and the third accommodating cavity are respectively used to accommodate a second liquid material and a second solid material that can contact each other and react to produce gas; the compression seal between the first accommodating cavity and the second accommodating cavity can be released by squeezing the first accommodating cavity to realize the communication between the first accommodating cavity and the second accommodating cavity; when the first accommodating cavity and the second accommodating cavity are communicated, the second liquid material can penetrate into the third accommodating cavity through the attraction of the protrusion.

2. The self-inflating cushion bag according to claim 1, characterized in that: The self-inflating cushion bag meets at least one of the following conditions: (1) The width of the press-sealed portion between the first bag cavity and the second bag cavity is L1, the width of the press-sealed portion between the first bag cavity and the fourth bag cavity is L2, and the width of the press-sealed portion between the second bag cavity and the fourth bag cavity is L3; L1<L2, L1<L3; (2) The strength of the press-sealed portion between the first bag cavity and the second bag cavity is Q1, the strength of the press-sealed portion between the first bag cavity and the fourth bag cavity is Q2, and the strength of the press-sealed portion between the second bag cavity and the fourth bag cavity is Q3; Q1<Q2, Q1<Q3.

3. The self-inflating cushion bag according to claim 2, characterized in that: The self-inflating cushion bag satisfies at least one of the following conditions: (a1) 0.8 mm ≤ L1 ≤ 1.2 mm, (a2) 2.5 mm ≤ L2 ≤ 3.5 mm, (a3) ​​2.5 mm ≤ L3 ≤ 3.5 mm; and / or The self-inflating cushion bag satisfies at least one of the following conditions: (b1) 3N / 15mm≤Q1≤5N / 15mm, (b2) 8N / 15mm≤Q2≤10N / 15mm, (b3) 8N / 15mm≤Q2≤10N / 15mm.

4. The self-inflating cushion bag according to any one of claims 1 to 3, characterized in that: The self-inflating cushion bag meets at least one of the following conditions: (1) A portion of the press-sealed portion between the first bag cavity and the second bag cavity is fully pressed to form a first fully fitted connection section, and another portion of the press-sealed portion is point pressed to form a first multi-point contact connection section; (2) The press-sealed portion between the first bag cavity and the fourth bag cavity is point pressed to form a second multi-point contact connection section; (3) The press-sealed portion between the second bag cavity and the fourth bag cavity is formed by point pressing to form a third multi-point contact connection section.

5. The self-inflating cushion bag according to claim 1, characterized in that: The self-inflating cushion bag meets at least one of the following conditions: (1) The width of the press-sealed portion between the first accommodating cavity and the second accommodating cavity is L4, and the width of the press-sealed portion between the third bag cavity and the fourth bag cavity is L5; L4<L5; (2) The strength of the compression seal between the first accommodating cavity and the second accommodating cavity is Q4, and the strength between the third bag cavity and the fourth bag cavity is Q5; Q4<Q5.

6. The self-inflating cushion bag according to claim 5, characterized in that: The self-inflating cushion bag satisfies at least one of the following conditions: (c1) 0.8 mm ≤ L4 ≤ 1.2 mm, (c2) L5 ≥ 7 mm; and / or The self-inflating cushion bag satisfies at least one of the following conditions: (d1) 3N / 15mm≤Q4≤5N / 15mm, (d2) 13N / 15mm≤Q5≤15N / 15mm.

7. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The self-inflating cushion bag meets at least one of the following conditions: (1) The compression seal portion between the first accommodating cavity and the second accommodating cavity is point-pressed to form a fourth multi-point contact connection section; (2) The press-sealed portion between the third bag cavity and the fourth bag cavity is fully pressed to form a second fully fitted connection section.

8. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The self-inflating cushion bag meets at least one of the following conditions: (1) The compression seal portion between the first accommodating cavity and the second accommodating cavity protrudes toward the interior of the third bag cavity; (2) The edge of the protruding portion contacts the compression seal portion between the first accommodating cavity and the second accommodating cavity.

9. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The edge of the bag body is provided with an edge sealing strip, and the edge sealing strip meets at least one of the following conditions: (e1) The width of the edge banding is L0, L0 ≥ 7 mm; (e2) The strength of the edge banding is Q0, Q0 ≥ 20N / 15mm.

10. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The bag body comprises a bag cavity, a part of which is separated by the corresponding press-sealed part to form the first bag cavity, a part of which is separated by the corresponding press-sealed part to form the second bag cavity, a part of which is separated by the corresponding press-sealed part to form the third bag cavity, and the remaining part of the bag cavity forms the fourth bag cavity; wherein the first bag cavity and the second bag cavity are adjacent, and the first bag cavity and the second bag cavity are respectively separated from the third bag cavity by a part of the fourth bag cavity; and / or An isolation layer is provided between the first bag cavity, the second bag cavity and the fourth bag cavity. The isolation layer can isolate solids and liquids and can pass gas.

11. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The first liquid material and the first solid material are respectively a part of a first gas generating material, and the first gas generating material comprises, by weight, 4 to 6 parts of citric acid, 8 to 12 parts of sodium bicarbonate, and 15 to 25 parts of water.

12. The self-inflating cushion bag according to claim 11, characterized in that: The weight ratio of the citric acid to the sodium bicarbonate is 1:(1.8-2.2); and / or The ratio of the total weight of the citric acid and the sodium bicarbonate to the volume of the water is 15 g: (15-25) mL.

13. The self-inflating cushion bag according to claim 11, characterized in that: The ratio of the weight of the citric acid in the first gas generating material to the volume of the fourth bag cavity is 5 g:4-5 L.

14. The self-inflating cushion bag according to any one of claims 1 to 3, 5 to 6, characterized in that: The second liquid material and the second solid material are respectively a part of a second gas generating material, and the second gas generating material comprises, by weight, 2 to 4 parts of citric acid, 3 to 5 parts of sodium bicarbonate, 4 to 8 parts of a binder, and 20 to 30 parts of water.

15. The self-inflating cushion bag according to claim 14, characterized in that: The weight ratio of the citric acid to the sodium bicarbonate is 1:(1.3-1.5); and / or The ratio of the total weight of the citric acid and the sodium bicarbonate to the volume of the water is 7.3 g: (20-30) mL; and / or The ratio of the total weight of the citric acid and the sodium bicarbonate to the weight of the binder is 1:(0.7-0.8).

16. The self-inflating cushion bag according to claim 14, characterized in that: The ratio of the weight of the citric acid in the second gas generating material to the volume of the fourth bag cavity is 3 g:4-5 L.

17. The self-inflating cushion bag according to claim 14, characterized in that: The second solid material includes the binder and at least one of the citric acid and the sodium bicarbonate; The second solid material is a powder block, and the preparation method of the powder block comprises the following steps: The second solid material is ground and then loaded into a block mold for pressing to obtain the powder block.

Images