Triggered slow-release fruit and vegetable fresh-keeping card

Abstract

The application provides a trigger type slow-release fruit and vegetable fresh-keeping card, which comprises a shell made of a breathable material, a gas generation unit arranged in the shell and comprising three independent functional units arranged in a first direction, an activator unit containing an activator, an acid source unit containing an acid source and a gas generation unit containing a gas generating agent and a stabilizer, an isolation structure arranged in the shell and between adjacent functional units, which is used for maintaining the reaction agents in each functional unit isolated from each other and the air environment during storage, a trigger operation part which can be operated externally to destroy the isolation structure, so that the reaction agents in each functional unit are exposed to the air environment and communicated with each other, and the activator and the acid source are driven to generate chlorine dioxide gas by the step-by-step acidification of the activator and the acid source, and a vacuum sealed package used for sealing the shell and the trigger operation part. The activity of the fresh-keeping agent can be improved, and the problem of uncontrollable trigger time caused by passive release can be overcome.

Description

Technical Field

[0001] This application relates to the field of fruit and vegetable preservation technology, specifically to a trigger-activated slow-release fruit and vegetable preservation card. Background Technology

[0002] In the prior art, such as the invention patent with application number 201710450517.4, a fruit, vegetable and flower preservation card with preservation function is disclosed. It adopts a multi-layer composite structure (surface layer, preservative combination layer, water-permeable and air-permeable layer, waterproof and air-permeable layer) and a 1-MCP microcapsule complex (0.014-4.5% content) to achieve slow-release preservation. Although this solution can delay the effect of ethylene, it is difficult to balance the long-term storage stability and the need for precise on-demand activation due to the direct coexistence of reactants (wetting agents (such as sodium dodecyl sulfate), stabilizers (such as BHT) and 1-MCP coexist in the same layer, which may lead to slow chemical interactions and reduce the activity of the preservative) and the passive release mechanism (relying on the water-permeable and air-permeable layer to passively release gas, which cannot activate or terminate the reaction as needed, and is prone to dosage waste or insufficiency). Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, the present invention aims to provide a trigger-activated slow-release fruit and vegetable preservation card to achieve strong long-term storage stability and to activate the reaction when needed; comprising: Functional inner core, the functional inner core comprising: The outer casing is made of a breathable material; A gas generating unit is located inside the outer shell and includes three independent functional units arranged sequentially along a first direction: an activator unit containing an activator, an acid source unit containing an acid source, and a gas generating unit containing a gas generator and a stabilizer. An isolation structure is provided inside the outer shell and between adjacent functional units to maintain the isolation of reactants within each functional unit from the air environment during storage. The triggering operation unit can be externally operated to destroy the isolation structure, so that the reactants in each of the functional units are exposed to the air environment and interconnected, so as to drive the gas generating unit to slowly release chlorine dioxide gas through the stepwise acidification of the activator and the acid source. Vacuum-sealed packaging, wherein the vacuum-sealed packaging is used to seal the functional core and the trigger operation part therein.

[0004] According to the technical solution provided in the embodiments of this application, the outer shell is covered with a plastic protective shell, and the plastic protective shell is covered with the vacuum-sealed packaging; the plastic protective shell has a first opening on one side along the first direction, and the first opening is used to detachably place the outer shell into the plastic protective shell.

[0005] According to the technical solution provided in the embodiments of this application, the activator is a mixture of ferric chloride and aluminum chloride in a weight ratio of 2:1.

[0006] According to the technical solution provided in the embodiments of this application, the acid source is sodium bisulfate.

[0007] According to the technical solution provided in the embodiments of this application, the gas generator is sodium chlorite and the stabilizer is sodium bicarbonate.

[0008] According to the technical solution provided in the embodiments of this application, the isolation structure includes three independent sealed bags, which respectively encapsulate the activator, the acid source, the gas generator, and the stabilizer; wherein each of the sealed bags is made of a puncture-resistant PE plastic film to maintain strict isolation during storage.

[0009] According to the technical solution provided in the embodiments of this application, the triggering operation unit includes a striking pin, which sequentially punctures the three sealed bags to achieve the operation, thereby breaking the isolation and initiating the reaction.

[0010] According to the technical solution provided in the embodiments of this application, the outer shell is composed of at least one silicone layer near the gas generating unit and at least one non-woven fabric layer away from the gas generating unit.

[0011] According to the technical solution provided in the embodiments of this application, the firing pin can penetrate into the interior of the plastic protective shell through the first opening and puncture the three sealed bags of the isolation structure in sequence.

[0012] According to the technical solution provided in the embodiments of this application, the plastic protective shell is provided with a plastic sealing zipper; the plastic sealing zipper includes interlocking ribs and grooves, and a slidable zipper head; when the zipper head slides to a first position, the ribs and grooves close to form an airtight seal; when the zipper head slides to a second position, the ribs and grooves separate to form a through first opening.

[0013] In summary, this application proposes a trigger-activated slow-release fruit and vegetable preservation card, comprising an outer shell made of a breathable material; a gas generating unit located inside the outer shell, comprising three independent functional units arranged sequentially along a first direction, namely an activator unit containing an activator, an acid source unit containing an acid source, and a gas generating unit containing a gas generator and a stabilizer; an isolation structure located inside the outer shell and between adjacent functional units, used to maintain the isolation of the reactants within each functional unit from the air environment during storage; a trigger operation unit can be externally operated to disrupt the isolation structure, exposing the reactants within each functional unit to the air environment and connecting them to each other, so as to drive the gas generating unit to slowly release chlorine dioxide gas through the graded acidification effect of the activator and the acid source; and a vacuum-sealed package used to seal the outer shell and the trigger operation unit inside.

[0014] Compared with existing technologies, the advantages of this application are as follows: The activator, acid source, gas generator, and stabilizer are placed in three independent sealed units, isolating them from environmental moisture / oxygen and ensuring mutual isolation. This results in zero loss of active ingredients during storage, completely avoiding premature failure caused by deliquescence and enhancing the activity of the preservative. Furthermore, the preservation card only requires triggering the operating unit to break the isolation during use, allowing the reactants to contact sequentially and form a graded acidification effect, eliminating side reactions during storage (such as heat / gas production). After triggering, the gas generator unit slowly releases chlorine dioxide gas, which is then released directionally through the permeable shell. This allows for subjective control when preservation is needed, enabling immediate activation and overcoming the uncontrollable triggering time problem caused by passive release. In addition, the broad-spectrum bactericidal ability of chlorine dioxide gas covers more spoilage causes (mold / bacteria), making it more widely applicable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the fruit and vegetable preservation card provided in the embodiments of this application.

[0016] The text labels in the image represent: 1. Vacuum-sealed packaging; 2. Non-woven fabric layer; 3. Silicone layer; 4. Sealed bag body; 5. Generating pin; 6. Activator unit; 7. Acid source unit; 8. Gas generating unit. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1 As mentioned in the background section, in response to the problems in the prior art, this application proposes a trigger-activated slow-release fruit and vegetable preservation card, such as... Figure 1 As shown, it includes: Functional inner core, the functional inner core comprising: The outer casing is made of a breathable material; Furthermore, the outer shell is composed of at least one silicone layer 3 near the gas generating unit and at least one non-woven fabric layer 2 away from the gas generating unit.

[0020] Specifically, the silicone layer 3 can be made of food-grade addition-cured silicone (0.2 mm thick) with a pore size of 0.5-1 μm to control the ClO2 permeation rate; the non-woven fabric layer 2 can be made of PP meltblown non-woven fabric to block solid particles and enhance mechanical strength. Hot-pressing lamination is used, with the silicone layer 3 facing the gas generation section. The shell formed by the silicone-non-woven fabric composite can achieve uniform release of preservative gas for 24 hours.

[0021] A gas generating unit is located inside the outer shell and includes three independent functional units arranged sequentially along a first direction: an activator unit 6 containing an activator, an acid source unit 7 containing an acid source, and a gas generating unit 8 containing a gas generator and a stabilizer. Furthermore, the activator is a mixture of ferric chloride and aluminum chloride in a weight ratio of 2:1.

[0022] Furthermore, the acid source is sodium bisulfate.

[0023] Furthermore, the gas generator is sodium chlorite, and the stabilizer is sodium bicarbonate.

[0024] An isolation structure is provided inside the outer shell and between adjacent functional units to maintain the isolation of reactants within each functional unit from the air environment during storage. Furthermore, the isolation structure includes three independent sealed bags 4, which respectively encapsulate the activator, the acid source, the gas generator, and the stabilizer; wherein each of the sealed bags 4 is made of a puncture-resistant PE plastic film to maintain strict isolation during storage.

[0025] The triggering operation unit can be externally operated to destroy the isolation structure, so that the reactants in each of the functional units are exposed to the air environment and interconnected, so as to drive the gas generating unit 8 to slowly release chlorine dioxide gas through the stepwise acidification of the activator and the acid source. Furthermore, the triggering operation unit includes a striking pin 5, which sequentially punctures the three sealed bags 4 to achieve the operation, thereby breaking the isolation and initiating the reaction.

[0026] Vacuum-sealed packaging 1, the vacuum-sealed packaging 1 being used to seal the functional inner core and the trigger operation part therein.

[0027] Specifically, the core functional part is the main functional structure for generating preservative gas, including an outer shell and the gas generating unit and isolation structure within it. The outer shell is made of a breathable material (such as a non-woven fabric composite silicone layer 3), allowing for slow gas release while preventing solid particle leakage. The gas generating unit contains three independent functional units, arranged sequentially along the first direction (the direction of the piercing pin, i.e., from the beginning to the end of the piercing): Activator unit 6: encapsulates an activator (such as a FeCl3 / AlCl3 mixture); Acid source unit 7: encapsulates an acid source (such as NaHSO4); Gas generating unit 8: encapsulates a gas generating agent (NaClO2) and a stabilizer (NaHCO3). Isolation structure: A PE sealed bag 4 separates each unit, completely isolating the reactant from air during storage. Triggering mechanism: A piercing pin mechanism, driven by external force, sequentially pierces the three units. The piercing pin 5 can be a stainless steel needle (1mm in diameter), with a length covering the total length of the three units + 5mm redundancy. Vacuum sealing packaging 1 is vacuum-sealed and then heat-sealed.

[0028] In a preferred embodiment, the outer shell is covered with a plastic protective shell, and the vacuum-sealed packaging 1 is covered with the plastic protective shell; the plastic protective shell has a first opening on one side along the first direction, and the first opening is used to detachably place the outer shell into the plastic protective shell.

[0029] Furthermore, the firing pin can penetrate the interior of the plastic protective shell through the first opening and puncture the three sealed bags 4 of the isolation structure in sequence.

[0030] Furthermore, the plastic protective shell is provided with a plastic sealing zipper; the plastic sealing zipper includes interlocking ribs and grooves, and a slidable zipper head; when the zipper head slides to the first position, the ribs and grooves close to form an airtight seal; when the zipper head slides to the second position, the ribs and grooves separate to form a through first opening.

[0031] Specifically, the plastic protective shell has a sleeve-like structure, which provides some support and prevents the gas generating unit from being accidentally punctured due to compression of the internal core during transportation.

[0032] The usage process is described as follows: First, during storage and transportation: The functional core and triggering operation unit of the fruit and vegetable preservation card are sealed within a vacuum-sealed package 1 and placed in a cool, dry environment; the vacuum state isolates oxygen and moisture, ensuring that the reactants (activators, acid sources, sodium chlorite) of each functional unit maintain absolute chemical inertness under the isolation structure. When preservation is required, the activation preparation stage is initiated: the sealing layer is torn off along the edge of the vacuum package, and the inner plastic protective shell is removed; the outer shell (containing the unactivated gas generating unit) is slid out from inside the plastic protective shell through the first opening on the side wall of the plastic protective shell (which can be shaped like a card sleeve) along the first direction. Gas reaction activation stage: holding the outer shell in one hand and the generating pin 5 in the other, vertical pressure is applied to the generating pin 5, driving the generating pin 5 to pierce sequentially along the first direction: Step 1: Pierce activator unit 6 (starting end) → The activator (FeCl3 / AlCl3) hydrolyzes upon contact with air, generating initial H. + environment; Step 2: Pierce acid source unit 7 (middle section) → Acid source (NaHSO4) in H + It ionizes in the environment, creating highly acidic conditions; Step 3: Pierce gas generating unit 8 (end) → Sodium chlorite (NaClO2) reacts under strong acid, stabilizer (NaHCO3) neutralizes by-product acid, and ClO2 gas is released in situ and slowly.

[0033] Specifically, this structure is based on an anhydrous triggering technology for the dry preparation of chlorine dioxide. A solid reactant system is selected, and the reaction is triggered by contact with moisture in the environment to achieve the slow release of chlorine dioxide. Simultaneously, by adjusting the proportions of the reactants, particle size, and the permeability of the packaging material, precise control over the release rate and duration of chlorine dioxide is achieved. This technology can meet the requirements for long-term, stable release of chlorine dioxide and is suitable for applications such as preservation and sterilization.

[0034] The main components of the solid formulation include: ferric chloride and aluminum chloride in a 2:1 ratio, sodium chlorite, anhydrous sodium carbonate, and sodium bisulfate. These components are mixed in a specific weight ratio: 8 parts ferric chloride and aluminum chloride, 18-20 parts sodium chlorite, 20-25 parts anhydrous sodium carbonate, and 20-25 parts sodium bisulfate.

[0035] When the solid mixture comes into contact with moisture in the environment, such as air humidity or the food itself, a series of chemical reactions occur between the components, generating chlorine dioxide gas in situ and slowly without the need for external energy or complex equipment.

[0036] The mechanism of the step-by-step acidification reaction (based on the sequence of impact pin punctures) is described below: Step 1: Puncture activator unit 6 The activator (FeCl3 / AlCl3) is exposed to air, absorbs moisture, and undergoes hydrolysis: FeCl3 + 3H2O → Fe(OH)3 + 3H + AlCl3 + 3 H2O → Al(OH)3 + 3 H2O + Function: Generate H + Initiating primary acidification provides an acidic environment for subsequent reactions.

[0037] Step 2: Pierce acid source unit 7 Acid source (NaHSO4) contacts H + The environment releases strong acid: NaHSO4 → Na + +H + +SO4 2- Function: Secondary acidification significantly improves H + Concentration drives the formation of a strongly acidic environment.

[0038] Step 3: Pierce the gas generating unit 8 NaClO2 reacts in a strongly acidic environment, and NaHCO3 neutralizes the byproduct HCl: 5ClO2 - +4H + →4ClO2+Cl - +2H2O; HCl+NaHCO3→NaCl+H2O+CO2 Function: Slowly releases ClO2 gas; stabilizer prevents explosive release caused by sudden pH drop.

[0039] This implementation method achieves storage stability: three-unit physical isolation + vacuum packaging eliminates pre-reaction (compared to the deliquescence problem of 1-MCP card microcapsules); on-demand activation: no gas is generated before the trigger is activated, and the usage time is controllable; safe and sustained release: staged acidification avoids violent exothermic reactions, and the NaHCO3 buffer system maintains a stable reaction.

[0040] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A trigger-activated slow-release fruit and vegetable preservation card, characterized in that, include: Functional inner core, the functional inner core comprising: The outer casing is made of a breathable material; The gas generating unit is located inside the outer shell and includes three independent functional units arranged sequentially along the first direction: an activator unit (6) containing an activator, an acid source unit (7) containing an acid source, and a gas generating unit (8) containing a gas generator and a stabilizer. An isolation structure is provided inside the outer shell and between adjacent functional units to maintain the isolation of reactants within each functional unit from the air environment during storage. The triggering operation unit can be externally operated to destroy the isolation structure, so that the reactants in each of the functional units are exposed to the air environment and interconnected, so as to drive the gas generating unit (8) to slowly release chlorine dioxide gas through the graded acidification effect of the activator and the acid source; Vacuum-sealed packaging (1) is used to seal the functional core and the trigger operation unit therein.

2. The fruit and vegetable preservation card according to claim 1, characterized in that: The outer shell is covered with a plastic protective shell, and the plastic protective shell is covered with the vacuum-sealed packaging (1); the plastic protective shell has a first opening on one side along the first direction, and the first opening is used to detachably place the outer shell into the plastic protective shell.

3. The fruit and vegetable preservation card according to claim 1, characterized in that: The acid source is sodium bisulfate.

4. The fruit and vegetable preservation card according to claim 1, characterized in that: The gas generator is sodium chlorite, and the stabilizer is sodium bicarbonate.

5. The fruit and vegetable preservation card according to claim 2, characterized in that: The isolation structure includes three independent sealed bags (4) that encapsulate the activator, the acid source, the gas generator, and the stabilizer, respectively; wherein each of the sealed bags (4) is made of a puncture-resistant PE plastic film to maintain strict isolation during storage.

6. The fruit and vegetable preservation card according to claim 5, characterized in that: The triggering operation unit includes a striking pin (5), which punctures the three sealed bags (4) in sequence to perform the operation, thereby breaking the isolation and initiating the reaction.

7. The fruit and vegetable preservation card according to claim 1, characterized in that: The outer shell is composed of at least one silicone layer (3) near the gas generating unit and at least one non-woven fabric layer (2) away from the gas generating unit.

8. The fruit and vegetable preservation card according to claim 6, characterized in that: The firing pin can penetrate the plastic protective shell through the first opening and puncture the three sealed bags (4) of the isolation structure in sequence.

9. The fruit and vegetable preservation card according to claim 2, characterized in that: The plastic protective shell is equipped with a plastic sealing zipper; the plastic sealing zipper includes interlocking ribs and grooves, and a slidable zipper head; when the zipper head slides to the first position, the ribs and grooves close to form an airtight seal; when the zipper head slides to the second position, the ribs and grooves separate to form a through first opening.

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