Split combined type self-heating liquid packaging system and preparation method thereof
By using a modular self-heating liquid packaging system with heat-resistant materials and composite self-heating reaction composition, problems such as uneven heating, pollution, and leakage are solved, achieving uniform and efficient heating and safe and reliable self-heating effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNSHAN RUISHENG TRADING CO LTD
- Filing Date
- 2026-04-13
- Publication Date
- 2026-05-12
AI Technical Summary
Existing self-heating liquid packaging technologies suffer from problems such as uneven heating, low efficiency, simple isolation structures leading to contamination, imperfect pressure relief structure design, unreasonable design of reaction water injection port, and easy deformation and leakage of inner bag material.
It adopts a split-combination design. The inner and outer packaging bags are made of PE material or composite film with a temperature resistance of 100℃. The inner packaging bag and the outer packaging bag form an independent heating chamber. The heating component is fixed at the bottom of the heating chamber. The reaction water inlet is connected to the pressure relief structure. The composite self-heating reaction composition is used for heating, and the steam is released through the pressure relief structure to prevent explosion.
It achieves uniform and efficient heating, avoids contamination of the inner bag's drinking liquid by heat reaction products, prevents the bag from rupturing and exploding, and ensures safety and reliability.
Smart Images
Figure CN122009677A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of food packaging technology, specifically relating to a modular self-heating liquid packaging system and its preparation method. It is particularly suitable for scenarios without external heat sources, such as outdoor travel, emergency disaster relief, and military operations, and has the potential for industrialization into an industry standard product. Background Technology
[0002] Self-heating liquid packaging technology is a core food packaging solution in scenarios without external heat sources, but existing technologies have many unresolved pain points: 1. The heating methods are mostly contact or local steam heating, which results in uneven heating, low efficiency, and no clear steam-enclosed heating structure design; 2. The isolation structure is simple, and the products of the exothermic reaction can easily come into contact with the inner bag, causing food contamination. It lacks a dedicated physical isolation structure design. 3. The pressure relief structure is poorly designed, lacks a clear structural form and location limit, and cannot reliably release vapor, which can easily lead to bag rupture and explosion; 4. The small size and unreasonable location of the reaction water injection port lead to problems such as slow injection and delayed reaction. 5. The inner bag material is susceptible to deformation and leakage at high temperatures. Summary of the Invention
[0003] The purpose of this invention is to provide a modular self-heating liquid packaging system and its preparation method, in order to solve at least one of the above-mentioned problems existing in the prior art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention provides a split-type self-heating liquid packaging system, including an outer packaging bag, an inner packaging bag, a heating element, a water outlet nozzle assembly, a reaction water inlet, and a pressure relief structure. The inner packaging bag is made of PE material, PP material, or composite film with a temperature resistance of 100℃. The inner packaging bag is located in the upper part of the outer packaging bag, so that the inner packaging bag and the outer packaging bag cooperate to form an independent heating chamber. The outer surface of the inner packaging bag is exposed in the heating chamber, which isolates the internal space of the inner packaging bag from the heating chamber. The water outlet nozzle assembly is connected to the inner packaging bag. The heating element is fixed to the bottom of the heating chamber, the reaction water inlet is connected to the heating chamber, and the pressure relief structure is connected to the heating chamber to release steam to prevent the outer packaging bag from rupturing and exploding. The reaction water inlet is an openable and resealable injection structure for injecting reaction water into the heating chamber and sealing it after injection. Then, the reaction water comes into contact with the heating element to generate steam and cover and heat the inner packaging bag. The injection structure is a self-sealing zipper structure, a bottle cap structure, or a one-way inlet valve structure.
[0005] As a preferred technical solution of the present invention, the inner packaging bag is suspended and fixed to the upper part of the inner side of the outer packaging bag by means of horizontal heat sealing at the top or vertical heat sealing at the side.
[0006] As a preferred technical solution of the present invention, the heating component is a composite self-heating reaction composition, which contains at least two of calcium oxide, iron powder, aluminum powder and sodium carbonate.
[0007] As a preferred technical solution of the present invention, the transverse cross-section of the outer packaging bag is a trapezoidal structure that is wider at the bottom and narrower at the top, so that the outer packaging bag remains upright and stable during use; or the bottom of the outer packaging bag is provided with a three-dimensional support structure, which is a K-shaped support base, a trapezoidal support base, a cylindrical support base or an expandable support foot structure, so that the bag can stand stably upright on any plane.
[0008] As a preferred technical solution of the present invention, the liquid injection structure is a one-way liquid inlet valve structure, and the pressure threshold when the one-way liquid inlet valve structure is opened is 0.15–0.2 MPa.
[0009] As a preferred technical solution of the present invention, the water spout assembly is sealed and installed on the top or side of the outer packaging bag. The water spout assembly has a water inlet and a drinking outlet, and both the water inlet and the drinking outlet are equipped with an openable cap structure.
[0010] As a preferred technical solution of the present invention, the reaction water injection port is located on the side or top of the outer packaging bag, and the opening size of the reaction water injection port is greater than 15mm.
[0011] On the other hand, the present invention also provides a method for preparing a split-combination self-heating liquid packaging system as described in any of the above claims, comprising the following steps: S1. Pre-fabricate outer packaging bags and inner packaging bags separately. The outer packaging bag is made of PET / AL / PE aluminum-plastic composite film, and the volume of the inner packaging bag is 40-60% of the volume of the outer packaging bag. S2. A reaction water inlet is provided on the side or upper part of the outer packaging bag, and the water outlet nozzle assembly is sealed and installed on the upper part of the outer packaging bag near the bag opening. S3. Place the inner packaging bag inside the outer packaging bag, and fix the inner packaging bag to the upper part of the outer packaging bag by horizontal heat sealing at the top or vertical heat sealing at the side to form an independent heating chamber. S4. A heating element is fixedly installed at the bottom of the heating chamber. The heating element is a composite self-heating reaction composition containing at least two of the following components: calcium oxide, iron powder, aluminum powder, and sodium carbonate. S5. The outer packaging bag is sealed as a whole, and then a sealing test is carried out to ensure that the product is qualified.
[0012] As a preferred technical solution of the present invention, the sealing detection method is as follows: 1) Inner packaging bag seal test: 0.1-0.2MPa compressed air is introduced into the inner packaging bag through the water outlet nozzle assembly, the inner bag area is immersed in water, and if no bubbles are generated within 30 seconds, the inner bag is deemed to be sealed. 2) Sealing test of outer packaging bag: 0.1-0.12MPa compressed air is introduced into the heating chamber, and the outer packaging bag, water outlet nozzle assembly, reaction water inlet and pressure relief structure are immersed in water. If no bubbles are generated within 30 seconds, the outer bag and related structures are deemed to be sealed and qualified.
[0013] Beneficial effects: The inner packaging bag of this invention is made of PE material, PP material or composite film with a temperature resistance of 100℃, which can avoid the risk of high temperature deformation and leakage. The inner packaging bag is set in the upper part of the outer packaging bag, so that the inner packaging bag and the outer packaging bag form an independent heating chamber. This allows the heating component fixed at the bottom of the heating chamber to be isolated from the inner packaging bag, so that the alkaline liquid, powder residue and / or condensate generated during the heating reaction of the heating component are completely isolated by the outer surface of the inner packaging bag, preventing the heating reaction products from contacting and contaminating the drinking liquid inside the inner packaging bag. After the reaction water comes into contact with the heating component, steam is generated, which can cover and heat the inner packaging bag. The heating is uniform and efficient. In actual operation, the steam can be released through the pressure relief structure to prevent the outer packaging bag from rupturing and exploding. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the modular self-heating liquid packaging system of the present invention.
[0015] Explanation of reference numerals in the attached drawings: 1-Outer packaging bag; 2-Inner packaging bag; 3-Heating component; 4-Heating chamber; 5-Water outlet nozzle assembly; 6-Reaction water inlet; 7-Pressure relief structure. Detailed Implementation
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.
[0017] Example: like Figure 1 As shown, this embodiment provides a modular self-heating liquid packaging system, including an outer packaging bag 1, an inner packaging bag 2, a heating element 3, a water outlet nozzle assembly 5, a reaction water inlet 6, and a pressure relief structure 7. For example, the outer packaging bag 1 is preferably a trapezoidal structure that is wider at the bottom and narrower at the top, so that the overall center of gravity is located in the bottom support area, achieving upright stability throughout the entire process of water injection, heating, and use. The dimensions are 100mm × 80mm at the bottom, 80mm × 60mm at the top, and 150mm in height. It is made of PET / AL / PE aluminum-plastic composite film, and the bottom is provided with an expandable support foot structure that folds inward to fix the shape. The inner packaging bag 2 is made of PE material, PP material, or composite film that is resistant to 100℃, which can avoid the risk of high-temperature deformation and leakage. The preferred dimensions are 60mm × 40mm. The inner packaging bag 2, measuring 120mm in diameter, is located in the upper part of the outer packaging bag 1, forming an independent heating chamber 4 between the inner packaging bag 2 and the outer packaging bag 1. The outer surface of the inner packaging bag 2 is exposed to the heating chamber 4, isolating the internal space of the inner packaging bag 2 from the heating chamber 4. This physical isolation structure completely isolates the alkaline liquid, powder residue, and / or condensate generated during the heating reaction of the heating component 3 from the outer surface of the inner packaging bag 2, preventing the heating reaction products from contacting and contaminating the drinking liquid inside the inner packaging bag 2. The water spout assembly 5 is connected to the inner packaging bag 2, preferably installed on the outer packaging bag 1 and connected to the inner packaging bag 2 via a heat-sealing process (200°C).
[0018] The heating element 3 is fixed to the bottom of the heating chamber 4. The reaction water inlet 6 is connected to the heating chamber 4. The pressure relief structure 7 is connected to the heating chamber 4 and is used to release steam through the pressure relief structure 7 to prevent the outer packaging bag 1 from rupturing and exploding. The reaction water inlet 6 is an openable and resealable liquid injection structure, used to inject reaction water into the heating chamber 4 and seal it after injection. Then, the reaction water comes into contact with the heating element 3 to generate steam and cover and heat the inner packaging bag 2. The liquid injection structure is a self-sealing zipper structure, a bottle cap structure, or a one-way liquid inlet valve structure.
[0019] Instructions for use: Open the cap of the water outlet nozzle assembly 5, inject the liquid to be heated, and close it; inject reaction water through the reaction water inlet 6, the reaction water quickly triggers the heating component 3, there is no local dry reaction, the heating component reacts quickly to generate a large amount of steam, which fully covers the inner bag for heating, and the heating is uniform; the physical isolation structure completely isolates the heating residue from the inner packaging bag 2, and there is no pollution; when the pressure in the heating chamber 4 reaches a certain level, the pressure relief structure 7 automatically opens to release pressure, the bag does not bulge or rupture, there is no steam leakage during the heating process, and it is safe and reliable.
[0020] The inner packaging bag 2 of this invention is made of PE material, PP material or composite film with a temperature resistance of 100℃, which can avoid the risk of high temperature deformation and leakage. The inner packaging bag 2 is set in the upper part of the outer packaging bag 1, so that the inner packaging bag 2 and the outer packaging bag 1 form an independent heating chamber 4. This allows the heating component 3 fixed at the bottom of the heating chamber 4 to be isolated from the inner packaging bag 2, so that the alkaline liquid, powder residue and / or condensate generated during the heating reaction of the heating component 3 are completely isolated by the outer surface of the inner packaging bag 2, preventing the heating reaction products from contacting and contaminating the drinking liquid inside the inner packaging bag 2. After the reaction water comes into contact with the heating component 3, steam is generated, which can cover and heat the inner packaging bag 2, and the heating is uniform and efficient. In practice, when the heating component 3 is heating, the steam can be released through the pressure relief structure 7 to prevent the outer packaging bag 1 from rupturing and exploding.
[0021] As a preferred embodiment of this example, it should be further explained that the inner packaging bag 2 is suspended and fixed to the upper inner side of the outer packaging bag 1 by means of horizontal heat sealing at the top or vertical heat sealing at the side. The outer surface of the inner packaging bag 2 is exposed in the heating chamber 4. In this way, when the heating component 3 comes into contact with the reaction water and generates hot steam, the hot steam can cover the surface of the inner packaging bag 2 in all directions, and then efficiently transfer heat to the drinking liquid inside the inner packaging bag 2.
[0022] As a preferred embodiment of this invention, it should be further explained that the heating component 3 is a composite self-heating reaction composition. This composition contains at least two of the following: calcium oxide, iron powder, aluminum powder, and sodium carbonate. The components are mixed according to the heating requirements. Calcium oxide is the main exothermic component, while iron and aluminum powder assist in exothermic reactions and improve thermal stability. Sodium carbonate is used to regulate the exothermic reaction rate and optimize steam generation. For example, the composite self-heating reaction composition may contain 35g of calcium oxide, 8g of iron powder, 4g of aluminum powder, and 3g of sodium carbonate, or 25g of calcium oxide, 12g of iron powder, 8g of aluminum powder, and 5g of sodium carbonate.
[0023] As a preferred embodiment of this invention, it should be further explained that the outer packaging bag 1 has a trapezoidal cross-section that is wider at the bottom and narrower at the top, so that the outer packaging bag 1 remains upright and stable during use, achieving upright stability throughout the entire process of water filling, heating, and use; or the bottom of the outer packaging bag 1 is provided with a three-dimensional support structure, which is a K-shaped support base, a trapezoidal support base, a cylindrical support base, or an expandable support foot structure, so that the bag can stand stably upright on any plane, preventing tipping, liquid spillage, and burns.
[0024] As a preferred embodiment of this example, it should be further noted that the liquid injection structure is a one-way liquid inlet valve structure. The pressure threshold when the one-way liquid inlet valve structure is opened is 0.15–0.2 MPa, which is lower than the failure pressure threshold (≥0.3 MPa) of the sealing structure of the outer packaging bag 1. Preferably, the exhaust port of the one-way liquid inlet valve is set at an angle downward at 30° to avoid direct injection of high-temperature steam and causing burns.
[0025] As a preferred embodiment of this invention, it should be further explained that the water spout assembly 5 is sealed and installed on the top or side of the outer packaging bag 1. The water spout assembly 5 has a water inlet and a drinking outlet, and both the water inlet and the drinking outlet are equipped with an openable cap structure to facilitate water filling and drinking respectively.
[0026] As a preferred embodiment of this example, it should be further noted that the reaction water injection port 6 is located on the side or top of the outer packaging bag 1, and the opening size of the reaction water injection port 6 is greater than 15mm, so as to achieve rapid liquid injection and avoid reaction delay.
[0027] On the other hand, the present invention also provides a method for preparing a split-combination self-heating liquid packaging system, comprising the following steps: S1. Pre-fabricate an outer packaging bag 1 and an inner packaging bag 2 separately. The outer packaging bag 1 is made of PET / AL / PE aluminum-plastic composite film, and the inner packaging bag 2 is made of PE material, PP material or composite film with a temperature resistance of 100℃. The volume of the inner packaging bag 2 is 40-60% of the volume of the outer packaging bag 1. S2. A reaction water injection port 6 is provided on the side or upper part of the outer packaging bag 1. The reaction water injection port 6 is an openable and resealable liquid injection structure. The liquid injection structure is a self-sealing zipper structure, a bottle cap structure, or a one-way liquid inlet valve structure, ensuring that the opening size is greater than 15mm. The water outlet nozzle assembly 5 is sealed and installed on the upper part of the outer packaging bag 1 near the bag opening through a hot melt sealing process (200℃). S3. Place the inner packaging bag 2 inside the outer packaging bag 1, and fix the inner packaging bag 2 to the upper part of the outer packaging bag 1 by horizontal heat sealing at the top or vertical heat sealing at the side. The heat sealing pressure is 0.4MPa and the heat sealing time is 2.5 seconds, forming an independent heating chamber 4, and connecting the water suction nozzle assembly 5 to the inner packaging bag 2. S4. A heating component 3 is fixedly installed at the bottom of the heating chamber 4. The heating component 3 is a composite self-heating reaction composition containing at least two of the following components: calcium oxide, iron powder, aluminum powder, and sodium carbonate. S5. Seal the outer packaging bag 1 as a whole, and then conduct a sealing test to ensure that the product is qualified.
[0028] As a preferred embodiment of this invention, it should be further explained that the sealing detection method is as follows: 1) Inner packaging bag 2 sealing test: 0.1-0.2MPa compressed air is introduced into the inner packaging bag 2 through the water outlet nozzle assembly 5, the inner bag area is immersed in water, and if no bubbles are generated within 30 seconds, the inner bag is judged to be sealed. 2) Sealing test of outer packaging bag 1: 0.1-0.12MPa compressed air is introduced into the heating chamber 4, which is lower than the opening pressure of the pressure relief structure 7 (preferably a one-way valve). The outer packaging bag 1, water outlet nozzle assembly 5, reaction water inlet 6 and the area where the pressure relief structure is located are immersed in water. If no bubbles are generated within 30 seconds, the outer bag and related structures are deemed to be sealed and qualified.
[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A modular self-heating liquid packaging system, characterized in that, The package includes an outer packaging bag (1), an inner packaging bag (2), a heating element (3), a water outlet nozzle assembly (5), a reaction water inlet (6), and a pressure relief structure (7). The inner packaging bag (2) is made of PE material, PP material, or composite film with a temperature resistance of 100℃. The inner packaging bag (2) is located in the upper part of the outer packaging bag (1), so that the inner packaging bag (2) and the outer packaging bag (1) cooperate to form an independent heating chamber (4). The outer surface of the inner packaging bag (2) is exposed in the heating chamber (4), so that the internal space of the inner packaging bag (2) is isolated from the heating chamber (4). The water outlet nozzle assembly (5) is connected to the inner packaging bag (2). The heating element (3) is fixed to the bottom of the heating chamber (4), the reaction water inlet (6) is connected to the heating chamber (4), and the pressure relief structure (7) is connected to the heating chamber (4) to release steam through the pressure relief structure (7) to prevent the outer packaging bag (1) from rupturing and exploding; the reaction water inlet (6) is an injection structure that can be opened and repeatedly sealed, used to inject reaction water into the heating chamber (4) and seal it after injection, so that the reaction water generates steam after contacting the heating element (3) and covers and heats the inner packaging bag (2); the injection structure is a self-sealing zipper structure, a bottle cap structure or a one-way liquid inlet valve structure.
2. The modular self-heating liquid packaging system according to claim 1, characterized in that, The inner packaging bag (2) is suspended and fixed to the upper inner side of the outer packaging bag (1) by means of horizontal heat sealing at the top or vertical heat sealing at the side.
3. The modular self-heating liquid packaging system according to claim 1, characterized in that, The heating component (3) is a composite self-heating reaction composition, which contains at least two of calcium oxide, iron powder, aluminum powder and sodium carbonate.
4. The modular self-heating liquid packaging system according to claim 1, characterized in that, The outer packaging bag (1) has a trapezoidal cross section that is wider at the bottom and narrower at the top, so that the outer packaging bag (1) remains upright and stable during use; or the bottom of the outer packaging bag (1) is provided with a three-dimensional support structure, which is a K-shaped support seat, a trapezoidal support seat, a cylindrical support seat or an expandable support foot structure, so that the bag can stand stably upright on any plane.
5. The modular self-heating liquid packaging system according to claim 1, characterized in that, The liquid injection structure is a one-way liquid inlet valve structure, and the pressure threshold when the one-way liquid inlet valve structure is opened is 0.15–0.2 MPa.
6. The modular self-heating liquid packaging system according to claim 1, characterized in that, The water spout assembly (5) is sealed and installed on the top or side of the outer packaging bag (1). The water spout assembly (5) has a water inlet and a drinking outlet, both of which are equipped with an openable cap structure.
7. The modular self-heating liquid packaging system according to claim 1, characterized in that, The reaction water inlet (6) is located on the side or top of the outer packaging bag (1), and the opening size of the reaction water inlet (6) is greater than 15mm.
8. A method for preparing a modular self-heating liquid packaging system as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Pre-fabricate an outer packaging bag (1) and an inner packaging bag (2) respectively. The outer packaging bag (1) is made of PET / AL / PE aluminum-plastic composite film, and the volume of the inner packaging bag (2) is 40-60% of the volume of the outer packaging bag (1). S2. A reaction water inlet (6) is provided on the side or upper part of the outer packaging bag (1), and the water outlet nozzle assembly (5) is sealed and installed on the upper part of the outer packaging bag (1) near the bag opening. S3. Place the inner packaging bag (2) inside the outer packaging bag (1), and fix the inner packaging bag (2) to the upper part of the outer packaging bag (1) by horizontal heat sealing at the top or vertical heat sealing at the side to form an independent heating chamber (4). S4. A heating component (3) is fixedly installed at the bottom of the heating chamber (4). The heating component (3) is a composite self-heating reaction composition containing at least two of the following components: calcium oxide, iron powder, aluminum powder and sodium carbonate. S5. The outer packaging bag (1) is sealed as a whole, and then a sealing test is performed to ensure that the product is qualified.
9. The modular self-heating liquid packaging system according to claim 8, characterized in that, The sealing detection method is as follows: 1) Sealing test of inner packaging bag (2): 0.1-0.2MPa compressed air is introduced into the inner packaging bag (2) through the water outlet nozzle assembly (5), the inner bag area is immersed in water, and if no bubbles are generated within 30 seconds, the inner bag is deemed to be sealed. 2) Sealing test of outer packaging bag (1): 0.1-0.12MPa compressed air is introduced into the heating chamber (4), and the area where the outer packaging bag (1), water outlet nozzle assembly (5), reaction water inlet (6) and pressure relief structure (7) are located is immersed in water. If no bubbles are generated within 30 seconds, the outer bag and related structures are deemed to be sealed and qualified.