A microcapsule active fire extinguishing patch for a power strip socket and a preparation method thereof

Abstract

The application discloses a microcapsule active fire extinguishing patch for a power plug socket, and belongs to the technical field of fire extinguishing media, which comprises the following components: a fire extinguishing agent core is prepared, a three-layer core-shell structure microcapsule is prepared, a double-trigger fire extinguishing core layer is formed, a multi-layer structure composite is carried out, an adhesive layer and a protective layer are prepared, and cutting detection and product packaging are carried out. In the application, a smoke sensing and temperature sensing two-stage trigger structure is adopted, and the two-stage trigger structure can realize active fire extinguishing in all time periods and all working conditions, can intervene in smoke suppression and fire retardation in the smoldering stage in advance, can quickly extinguish fire in the open fire stage, and can completely solve the problem that traditional patches cannot prevent and control low-temperature smoldering fire.

Description

Technical Field

[0001] This invention belongs to the field of fire extinguishing medium technology, and particularly relates to a microcapsule active fire extinguishing patch for power strip sockets and its preparation method. Background Technology

[0002] Power strips and wall sockets are frequently used electrical accessories in homes, offices, and industrial settings. They are prone to malfunctions such as overload, poor contact, short circuits, and dust and moisture accumulation, which can easily ignite initial electrical fires. These fires often occur in small, enclosed spaces, are difficult to detect, spread rapidly, and are difficult to extinguish with conventional fire extinguishing equipment. Manual firefighting responses are also often delayed, making this a core scenario for high-risk electrical fires.

[0003] Currently, most existing microcapsule fire extinguishing patches use a single temperature triggering mechanism, relying solely on high temperatures to melt the capsule wall material and release the extinguishing agent. However, this approach still has several problems: electrical fires often begin with smoldering and smoke, and the fire cannot be extinguished until the ambient temperature reaches the capsule's triggering threshold, allowing the fire to continue to spread; conventional single-layer microcapsule structures have poor resistance to pressure and heat aging, and the long-term operation of the socket causes heat generation and deformation, which can lead to premature capsule failure and ineffective protection; furthermore, existing patches have a simple structure and do not have dustproof, heat-insulating, and flame-retardant protective structures designed for the dense wiring and dust accumulation conditions inside the socket. The extinguishing agent is easily absorbed and rendered ineffective by dust, and the patch substrate is prone to aging, deformation, and detachment under high-temperature environments, resulting in poor performance in practical applications. To solve these problems, there is an urgent need for a microcapsule active fire extinguishing patch for power sockets and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a microcapsule active fire extinguishing patch for power strip sockets and its preparation method in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a microcapsule active fire extinguishing patch for power strip sockets, comprising the following components by mass percentage:

[0006] Dustproof and flame-retardant top layer, dual-trigger fire extinguishing core layer, heat-insulating buffer bottom layer, high-temperature resistant adhesive layer and release protective layer;

[0007] The dual-trigger fire extinguishing core layer is the core functional layer, and is uniformly embedded with composite dual-trigger fire extinguishing microcapsules. The composite dual-trigger fire extinguishing microcapsules have a three-layer core-shell structure, with fire extinguishing agent core, flexible buffer layer and dual-trigger response shell arranged sequentially from the inside to the outside.

[0008] The fire extinguishing agent core is composed of perfluorohexanone, ammonium dihydrogen phosphate, and nano flame-retardant silica; the flexible buffer interlayer is a modified polyvinyl alcohol elastic coating layer; the dual-trigger response shell is a temperature-sensing and smoke-sensing composite response layer, which is prepared by blending heat-sensitive polymer materials and smoke-sensing gas-sensing materials.

[0009] The dustproof and flame-retardant surface layer is a micron-sized porous flame-retardant PET film with a hydrophobic and dustproof coating sprayed on the surface. The heat-insulating and buffering bottom layer is a glass fiber flame-retardant heat-insulating cotton with a thickness of 0.2-0.4mm.

[0010] The high-temperature resistant adhesive layer is a modified silicone pressure-sensitive adhesive layer with a temperature resistance range of -40℃ to 180℃; the release protective layer is a PET release film.

[0011] As a further description of the above technical solution:

[0012] The composite dual-trigger fire extinguishing microcapsules have a particle size of 20-50 μm, a particle size uniformity of ≥95%, and a coating integrity rate of ≥98%. The trigger threshold of the dual-trigger response shell is divided into two levels: Level 1 smoke detection triggering, when the smoke concentration is ≥0.15dB / m, the shell slightly cracks, releasing a trace amount of fire extinguishing agent to suppress smoldering; Level 2 temperature detection triggering, when the ambient temperature is ≥110℃, the shell completely cracks, rapidly releasing all the fire extinguishing agent to extinguish open flames.

[0013] As a further description of the above technical solution:

[0014] The components of the fire extinguishing agent core are: 60-70 parts perfluorohexanone, 20-25 parts ammonium dihydrogen phosphate, and 5-10 parts nano flame-retardant silica; the components of the dual-trigger response shell are: 35-45 parts polyvinylidene fluoride, 20-25 parts acrylic resin, 8-12 parts gas-sensitive zinc oxide powder, 5-8 parts thermosensitive paraffin microspheres, 3-5 parts crosslinking agent, and the remainder deionized water.

[0015] As a further description of the above technical solution:

[0016] The thickness of the dual-trigger fire extinguishing core layer is 0.3-0.5 mm, and the composite dual-trigger fire extinguishing microcapsules are uniformly and densely arranged with a density of 800-1000 capsules / cm². 2 .

[0017] This invention also discloses a method for preparing a microcapsule active fire extinguishing patch for power strip sockets, the specific steps of which are as follows:

[0018] S1. Preparation of the fire extinguishing agent core;

[0019] S2. Preparation of three-layer core-shell structured microcapsules;

[0020] S3. Perform dual-trigger fire extinguishing core layer molding;

[0021] S4. Perform multi-layer composite bonding;

[0022] S5. Prepare the adhesive layer and protective layer;

[0023] S6. Perform cutting inspection and package the finished product.

[0024] As a further description of the above technical solution:

[0025] In step S1, the preparation of the fire extinguishing agent core involves the following steps: perfluorohexanone, ammonium dihydrogen phosphate, and nano flame-retardant silica are added to a high-speed disperser according to the specified ratio and dispersed at 800-1000 r / min for 15-20 min at room temperature to form a uniform and stable composite fire extinguishing agent emulsion, which is then sealed and kept warm for later use.

[0026] As a further description of the above technical solution:

[0027] In step S2, a three-layer core-shell structure microcapsule is prepared. The specific steps are as follows: composite dual-trigger fire extinguishing microcapsules are prepared by in-situ polymerization combined with layered coating process. Specifically, the fire extinguishing agent emulsion prepared in step S1 is used as the core material, and a modified polyvinyl alcohol solution is added dropwise. The mixture is stirred at room temperature to form a flexible buffer interlayer. Then, the temperature is raised to 55-60℃, and a premixed dual-trigger response outer shell raw material liquid is added dropwise. The mixture is subjected to constant temperature polymerization reaction for 40-50 min. After centrifugation, washing, and low-temperature drying, microcapsules with a particle size of 20-50 μm are screened for later use.

[0028] As a further description of the above technical solution:

[0029] In step S3, the dual-trigger fire extinguishing core layer is formed. The specific steps are as follows: the screened composite dual-trigger fire extinguishing microcapsules and flame-retardant water-based adhesive are uniformly mixed at a mass ratio of 1:1.2, vacuum degassing for 3-5 minutes, and uniformly coated on the upper surface of the heat insulation buffer bottom layer using a precision coating machine. The coating thickness is controlled at 0.3-0.5 mm, and cured at room temperature for 2-3 hours to form an integrated fire extinguishing core layer.

[0030] As a further description of the above technical solution:

[0031] In step S4, a multi-layer composite bonding process is performed. The specific steps are as follows: a dustproof and flame-retardant surface layer is bonded to the upper surface of the fire extinguishing core layer, and a heat-insulating and buffering bottom layer is bonded to the lower surface. The bonding process is carried out using a low-temperature hot-pressing process, controlling the hot-pressing temperature at 40-45℃, the pressure at 0.3-0.5MPa, and the hot-pressing time at 8-12s to ensure that each layer is free of air bubbles and tightly bonded.

[0032] As a further description of the above technical solution:

[0033] In step S5, the adhesive layer and protective layer are prepared. The specific steps are as follows: a modified silicone pressure-sensitive adhesive is uniformly coated on the lower surface of the heat insulation buffer layer with a coating thickness of 0.1-0.2 mm. The coating is left to dry at room temperature for 10-15 minutes to form a high-temperature resistant adhesive layer. Finally, a PET release protective layer is attached. In step S6, the cutting, testing, and packaging of the finished product are carried out. The specific steps are as follows: the patch is cut according to the general specifications of the plug board and socket. The smoke and temperature triggering performance, adhesive strength, and high-temperature aging resistance are tested one by one. After passing the test, the patch is vacuum-sealed to obtain the finished fire extinguishing patch.

[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0035] This invention employs a two-stage triggering structure of smoke and temperature sensors to proactively extinguish fires in all time periods and under all operating conditions, targeting two core fire scenarios: smoldering smoke from power strips and sockets, and high-temperature short-circuit open flames. It intervenes early in the smoldering stage to suppress smoke and retard flames, and quickly extinguishes fires in the open flame stage, completely solving the problem that traditional patch panels cannot prevent low-temperature smoldering fires.

[0036] In this invention, a flexible buffer layer is added to the material to effectively buffer the pressure of the plug-in installation, daily deformation, and equipment vibration, preventing premature rupture and leakage of the microcapsules. At the same time, the inner and outer layers work together to improve the temperature resistance, dustproof, and moisture-proof performance, making it suitable for the harsh working conditions of plug-in long-term power supply and heat generation and dust accumulation in a sealed environment. The service life of the protection is greatly extended. It abandons the traditional single perfluorohexanone fire extinguishing agent and combines ammonium dihydrogen phosphate and nano flame-retardant silica, which has multiple functions such as gas phase cooling and suffocation, solid phase covering flame retardancy, and adsorption and smoke suppression. After the fire is extinguished, it can form a dense flame-retardant protective film on the surface of the circuit to prevent reignition, which meets the core requirements of fire prevention and reignition prevention of electrical equipment.

[0037] This invention addresses the challenges of confined spaces in power strips and sockets by incorporating a multi-layered composite structure that provides dustproofing, heat insulation, cushioning, flame retardancy, and adhesion. This structure effectively prevents dust and moisture from intruding and causing chemical failure, while also protecting against long-term high-temperature aging damage. Its ultra-thin and lightweight design saves internal space and is compatible with all power strip and wall socket specifications, facilitating easy installation. The process employs a layered coating, precision coating, and low-temperature hot-pressing integrated process, strictly controlling the microcapsule particle size, arrangement density, and thickness of each layer. This ensures uniform and stable product performance and effectively avoids the problems of uneven particle size, hollow bonding, and significant differences in trigger sensitivity associated with traditional processes, resulting in a high yield rate in mass production. Attached Figure Description

[0038] Figure 1 This is a flowchart illustrating a method for preparing a microcapsule active fire extinguishing patch for a power strip socket. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] This invention provides a technical solution: a microcapsule active fire extinguishing patch for power strip sockets, comprising the following components in the following amounts:

[0042] Dustproof and flame-retardant top layer, dual-trigger fire extinguishing core layer, heat-insulating buffer bottom layer, high-temperature resistant adhesive layer and release protective layer;

[0043] The dual-trigger fire extinguishing core layer is the core functional layer, and is uniformly embedded with composite dual-trigger fire extinguishing microcapsules. The composite dual-trigger fire extinguishing microcapsules have a three-layer core-shell structure, with fire extinguishing agent core, flexible buffer layer and dual-trigger response shell arranged sequentially from the inside to the outside.

[0044] The fire extinguishing agent core is composed of perfluorohexanone, ammonium dihydrogen phosphate, and nano flame-retardant silica; the flexible buffer interlayer is a modified polyvinyl alcohol elastic coating layer; the dual-trigger response shell is a temperature-sensing and smoke-sensing composite response layer, which is prepared by blending heat-sensitive polymer materials and smoke-sensing gas-sensing materials.

[0045] The dustproof and flame-retardant surface layer is a micron-sized porous flame-retardant PET film with a hydrophobic and dustproof coating sprayed on the surface. The heat-insulating and buffering bottom layer is a glass fiber flame-retardant heat-insulating cotton with a thickness of 0.3mm.

[0046] The high-temperature resistant adhesive layer is a modified silicone pressure-sensitive adhesive layer with a temperature resistance range of -40℃ to 180℃; the release protective layer is a PET release film.

[0047] The composite dual-trigger fire extinguishing microcapsules have a particle size of 40μm, a particle size uniformity of ≥95%, and a coating integrity rate of ≥98%. The trigger threshold of the dual-trigger response shell is divided into two levels: Level 1 smoke detection triggering, when the smoke concentration is ≥0.15dB / m, the shell slightly cracks, releasing a trace amount of fire extinguishing agent to suppress smoldering; Level 2 temperature detection triggering, when the ambient temperature is ≥110℃, the shell completely cracks, rapidly releasing all the fire extinguishing agent to extinguish open flames.

[0048] The components of the fire extinguishing agent core are: 65 parts perfluorohexanone, 20 parts ammonium dihydrogen phosphate, and 8 parts nano flame-retardant silica; the components of the dual-trigger response shell are: 40 parts polyvinylidene fluoride, 22 parts acrylic resin, 10 parts gas-sensitive zinc oxide powder, 5 parts thermosensitive paraffin microspheres, 4 parts crosslinking agent, and the remainder deionized water.

[0049] The dual-trigger fire extinguishing core layer is 0.4 mm thick, and the composite dual-trigger fire extinguishing microcapsules are uniformly and densely arranged at a density of 900 capsules / cm². 2 .

[0050] In this embodiment, a two-stage triggering structure of smoke and temperature is adopted. It can achieve active fire suppression at all times and under all working conditions for two core fire conditions: smoldering smoke from sockets and high-temperature short-circuit open flame. It intervenes in advance to suppress smoke and retard flames during the smoldering stage and extinguishes the fire quickly during the open flame stage, completely solving the problem that traditional patch panels cannot prevent low-temperature smoldering fires.

[0051] Example 2

[0052] Please see Figure 1 This invention provides a technical solution: a method for preparing a microcapsule active fire extinguishing patch for power strip sockets, the specific steps of which are as follows:

[0053] S1. Preparation of the core of the fire extinguishing agent: The specific steps are as follows: Perfluorohexanone, ammonium dihydrogen phosphate and nano flame-retardant silica are put into a high-speed disperser according to the ratio and dispersed at 800 r / min for 15 min at room temperature to form a uniform and stable composite fire extinguishing agent emulsion. The emulsion is then sealed and kept warm for later use.

[0054] S2. Preparation of three-layer core-shell structured microcapsules: The specific steps are as follows: Composite dual-trigger fire extinguishing microcapsules are prepared by in-situ polymerization combined with layered coating process. Specifically, the fire extinguishing agent emulsion prepared in step S1 is used as the core material, and a modified polyvinyl alcohol solution is added dropwise. The mixture is stirred at room temperature to form a flexible buffer interlayer. Then, the temperature is raised to 55°C, and a premixed dual-trigger response outer shell raw material liquid is added dropwise. The mixture is subjected to constant temperature polymerization reaction for 40 min. After centrifugation, washing, and low-temperature drying, microcapsules with a particle size of 20 μm are screened for later use.

[0055] S3. The dual-trigger fire extinguishing core layer is formed. The specific steps are as follows: the screened composite dual-trigger fire extinguishing microcapsules and flame-retardant water-based adhesive are mixed evenly at a mass ratio of 1:1.2, vacuum degassing for 3 minutes, and then evenly coated on the upper surface of the heat insulation buffer bottom layer using a precision coating machine. The coating thickness is controlled at 0.3 mm, and cured at room temperature for 2 hours to form an integrated fire extinguishing core layer.

[0056] S4. Perform multi-layer composite bonding. The specific steps are as follows: bond a dustproof and flame-retardant surface layer to the upper surface of the fire extinguishing core layer, and a heat insulation and buffer bottom layer to the lower surface. Use a low-temperature hot pressing process to bond the layers, controlling the hot pressing temperature at 40℃, the pressure at 0.3MPa, and the hot pressing time at 8s, to ensure that each layer is free of bubbles and tightly bonded.

[0057] S5. Preparation of adhesive layer and protective layer. The specific steps are as follows: uniformly coat modified silicone pressure-sensitive adhesive on the lower surface of the heat insulation buffer bottom layer with a coating thickness of 0.1mm, let it dry at room temperature for 10 minutes to form a high temperature resistant adhesive layer, and finally attach the PET release protective layer.

[0058] S6. Cutting, testing, and packaging of finished products. The specific steps are as follows: cut the patches according to the general specifications of the plug board and socket, and test the smoke and temperature triggering performance, adhesive strength, and high temperature aging resistance of each patch. After passing the test, vacuum seal the patch to obtain the finished fire extinguishing patch.

[0059] In this embodiment, a flexible buffer layer is added to the material to effectively buffer the pressure of the plug-in installation, daily deformation, and equipment vibration, preventing premature rupture and leakage of microcapsules. At the same time, the inner and outer layers work together to improve the temperature resistance, dustproof, and moisture-proof performance, making it suitable for the harsh working conditions of plug-in long-term power supply and heat generation and dust accumulation in a sealed environment. The service life of the protection is greatly extended. It abandons the traditional single perfluorohexanone fire extinguishing agent and combines ammonium dihydrogen phosphate and nano flame-retardant silica, which has multiple functions such as gas phase cooling and suffocation, solid phase covering flame retardancy, and adsorption and smoke suppression. After the fire is extinguished, it can form a dense flame-retardant protective film on the surface of the line to prevent reignition, which meets the core requirements of fire prevention and reignition prevention of electrical equipment.

[0060] Example 3

[0061] Please see Figure 1 This invention provides a technical solution: a method for preparing a microcapsule active fire extinguishing patch for power strip sockets, the specific steps of which are as follows:

[0062] S1. Preparation of the fire extinguishing agent core: According to the formula, perfluorohexanone, ammonium dihydrogen phosphate and nano flame-retardant silica are put into a high-speed disperser and dispersed at 900 r / min for 18 min at room temperature to form a uniform and stable composite fire extinguishing agent emulsion. It is then sealed and kept warm for later use.

[0063] S2. Preparation of three-layer core-shell structured microcapsules: The specific steps are as follows: Composite dual-trigger fire extinguishing microcapsules are prepared by in-situ polymerization combined with layered coating process. Specifically, the fire extinguishing agent emulsion prepared in step S1 is used as the core material, and a modified polyvinyl alcohol solution is added dropwise. The mixture is stirred at room temperature to form a flexible buffer interlayer. Then, the temperature is raised to 58°C, and a premixed dual-trigger response outer shell raw material liquid is added dropwise. The mixture is subjected to constant temperature polymerization reaction for 45 min. After centrifugation, washing, and low-temperature drying, microcapsules with a particle size of 40 μm are screened for later use.

[0064] S3. The dual-trigger fire extinguishing core layer is formed. The specific steps are as follows: the screened composite dual-trigger fire extinguishing microcapsules and flame-retardant water-based adhesive are mixed evenly at a mass ratio of 1:1.2, vacuum degassing for 4 minutes, and then evenly coated on the upper surface of the heat insulation buffer bottom layer using a precision coating machine. The coating thickness is controlled at 0.4 mm, and the mixture is cured at room temperature for 2 hours to form an integrated fire extinguishing core layer.

[0065] S4. Perform multi-layer composite bonding. The specific steps are as follows: a dustproof and flame-retardant surface layer is bonded to the upper surface of the fire extinguishing core layer, and a heat insulation and buffer bottom layer is bonded to the lower surface. The low-temperature hot pressing process is used for bonding, and the hot pressing temperature is controlled at 42℃, the pressure is 0.4MPa, and the hot pressing time is 10s to ensure that each layer is free of bubbles and tightly bonded.

[0066] S5. Preparation of adhesive layer and protective layer. The specific steps are as follows: uniformly coat modified silicone pressure-sensitive adhesive on the lower surface of the heat insulation buffer bottom layer with a coating thickness of 0.1mm, let it dry at room temperature for 12 minutes to form a high temperature resistant adhesive layer, and finally attach the PET release protective layer.

[0067] S6. Cutting, testing, and packaging of finished products. The specific steps are as follows: cut the patches according to the general specifications of the plug board and socket, and test the smoke and temperature triggering performance, adhesive strength, and high temperature aging resistance of each patch. After passing the test, vacuum seal the patch to obtain the finished fire extinguishing patch.

[0068] In this embodiment, a multi-layered composite structure with dustproof, heat insulation, buffer, flame retardant and adhesive properties is designed for the small and enclosed space of the power strip socket. This structure not only prevents dust and moisture from entering and thus avoids the failure of the agent, but also prevents long-term high-temperature aging damage. At the same time, the ultra-thin and lightweight design does not occupy the internal space of the equipment, and it is compatible with all specifications of power strips and wall sockets, making installation convenient.

[0069] Example 4

[0070] Please see Figure 1 This invention provides a technical solution: a method for preparing a microcapsule active fire extinguishing patch for power strip sockets, the specific steps of which are as follows:

[0071] S1. Preparation of the fire extinguishing agent core: According to the formula, perfluorohexanone, ammonium dihydrogen phosphate and nano flame-retardant silica are put into a high-speed disperser and dispersed at 1000 r / min for 20 min at room temperature to form a uniform and stable composite fire extinguishing agent emulsion. It is then sealed and kept warm for later use.

[0072] S2. Preparation of three-layer core-shell structured microcapsules: The specific steps are as follows: Composite dual-trigger fire extinguishing microcapsules are prepared by in-situ polymerization combined with layered coating process. Specifically, the fire extinguishing agent emulsion prepared in step S1 is used as the core material, and a modified polyvinyl alcohol solution is added dropwise. The mixture is stirred at room temperature to form a flexible buffer interlayer. Then, the temperature is raised to 60°C, and a premixed dual-trigger response outer shell raw material liquid is added dropwise. The mixture is subjected to constant temperature polymerization reaction for 50 min. After centrifugation, washing, and low-temperature drying, microcapsules with a particle size of 50 μm are screened for later use.

[0073] S3. The dual-trigger fire extinguishing core layer is formed. The specific steps are as follows: the screened composite dual-trigger fire extinguishing microcapsules and flame-retardant water-based adhesive are mixed evenly at a mass ratio of 1:1.2, vacuum degassing for 5 minutes, and then evenly coated on the upper surface of the heat insulation buffer bottom layer using a precision coating machine. The coating thickness is controlled at 0.5 mm, and the mixture is cured at room temperature for 3 hours to form an integrated fire extinguishing core layer.

[0074] S4. Perform multi-layer composite bonding. The specific steps are as follows: bond a dustproof and flame-retardant surface layer to the upper surface of the fire extinguishing core layer, and a heat insulation and buffer bottom layer to the lower surface. Use a low-temperature hot pressing process to bond the layers, controlling the hot pressing temperature at 45℃, the pressure at 0.5MPa, and the hot pressing time at 12s to ensure that each layer is free of air bubbles and tightly bonded.

[0075] S5. Preparation of adhesive layer and protective layer. The specific steps are as follows: uniformly coat modified silicone pressure-sensitive adhesive on the lower surface of the heat insulation buffer bottom layer with a coating thickness of 0.2mm, let it dry at room temperature for 15 minutes to form a high temperature resistant adhesive layer, and finally attach the PET release protective layer.

[0076] S6. Cutting, testing, and packaging of finished products. The specific steps are as follows: cut the patches according to the general specifications of the plug board and socket, and test the smoke and temperature triggering performance, adhesive strength, and high temperature aging resistance of each patch. After passing the test, vacuum seal the patch to obtain the finished fire extinguishing patch.

[0077] In this embodiment, the process adopts a layered coating, precision coating and low temperature hot pressing integrated process, which strictly controls the microcapsule particle size, arrangement density and thickness of each layer. The product performance is uniform and stable, which can effectively avoid the problems of uneven particle size, hollow bonding and large difference in trigger sensitivity in traditional processes, and the batch production qualification rate is high.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A microcapsule active fire extinguishing patch for power strip sockets, characterized in that, It includes the following components: Dustproof and flame-retardant top layer, dual-trigger fire extinguishing core layer, heat-insulating buffer bottom layer, high-temperature resistant adhesive layer and release protective layer; The dual-trigger fire extinguishing core layer is the core functional layer, and is uniformly embedded with composite dual-trigger fire extinguishing microcapsules. The composite dual-trigger fire extinguishing microcapsules have a three-layer core-shell structure, with fire extinguishing agent core, flexible buffer layer and dual-trigger response shell arranged sequentially from the inside to the outside. The fire extinguishing agent core is composed of perfluorohexanone, ammonium dihydrogen phosphate, and nano flame-retardant silica; the flexible buffer interlayer is a modified polyvinyl alcohol elastic coating layer; the dual-trigger response shell is a temperature-sensing and smoke-sensing composite response layer, which is prepared by blending heat-sensitive polymer materials and smoke-sensing gas-sensing materials. The dustproof and flame-retardant surface layer is a micron-sized porous flame-retardant PET film with a hydrophobic and dustproof coating sprayed on the surface. The heat-insulating and buffering bottom layer is a glass fiber flame-retardant heat-insulating cotton with a thickness of 0.2-0.4mm. The high-temperature resistant adhesive layer is a modified silicone pressure-sensitive adhesive layer with a temperature resistance range of -40℃ to 180℃; the release protective layer is a PET release film.

2. The microcapsule active fire extinguishing patch for power strip sockets according to claim 1, characterized in that, The composite dual-trigger fire extinguishing microcapsules have a particle size of 20-50 μm, a particle size uniformity of ≥95%, and a coating integrity rate of ≥98%. The trigger threshold of the dual-trigger response shell is divided into two levels: Level 1 smoke detection triggering, when the smoke concentration is ≥0.15dB / m, the shell slightly cracks, releasing a trace amount of fire extinguishing agent to suppress smoldering; Level 2 temperature detection triggering, when the ambient temperature is ≥110℃, the shell completely cracks, rapidly releasing all the fire extinguishing agent to extinguish open flames.

3. The microcapsule active fire extinguishing patch for power strip sockets according to claim 2, characterized in that, The components of the fire extinguishing agent core are: 60-70 parts perfluorohexanone, 20-25 parts ammonium dihydrogen phosphate, and 5-10 parts nano flame-retardant silica; the components of the dual-trigger response shell are: 35-45 parts polyvinylidene fluoride, 20-25 parts acrylic resin, 8-12 parts gas-sensitive zinc oxide powder, 5-8 parts thermosensitive paraffin microspheres, 3-5 parts crosslinking agent, and the remainder deionized water.

4. A microcapsule active fire extinguishing patch for power strip sockets according to claim 3, characterized in that, The thickness of the dual-trigger fire extinguishing core layer is 0.3-0.5 mm, and the composite dual-trigger fire extinguishing microcapsules are uniformly and densely arranged with a density of 800-1000 capsules / cm². 2 .

5. A method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to any one of claims 1-4, characterized in that, The specific steps are as follows: S1. Preparation of the fire extinguishing agent core; S2. Preparation of three-layer core-shell structured microcapsules; S3. Perform dual-trigger fire extinguishing core layer molding; S4. Perform multi-layer composite bonding; S5. Prepare the adhesive layer and protective layer; S6. Perform cutting inspection and package the finished product.

6. The method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to claim 5, characterized in that, In step S1, the preparation of the fire extinguishing agent core involves the following steps: perfluorohexanone, ammonium dihydrogen phosphate, and nano flame-retardant silica are added to a high-speed disperser according to the specified ratio and dispersed at 800-1000 r / min for 15-20 min at room temperature to form a uniform and stable composite fire extinguishing agent emulsion, which is then sealed and kept warm for later use.

7. The method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to claim 5, characterized in that, In step S2, a three-layer core-shell structure microcapsule is prepared. The specific steps are as follows: composite dual-trigger fire extinguishing microcapsules are prepared by in-situ polymerization combined with layered coating process. Specifically, the fire extinguishing agent emulsion prepared in step S1 is used as the core material, and a modified polyvinyl alcohol solution is added dropwise. The mixture is stirred at room temperature to form a flexible buffer interlayer. Then, the temperature is raised to 55-60℃, and a premixed dual-trigger response outer shell raw material liquid is added dropwise. The mixture is subjected to constant temperature polymerization reaction for 40-50 min. After centrifugation, washing, and low-temperature drying, microcapsules with a particle size of 20-50 μm are screened for later use.

8. The method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to claim 5, characterized in that, In step S3, the dual-trigger fire extinguishing core layer is formed. The specific steps are as follows: the screened composite dual-trigger fire extinguishing microcapsules and flame-retardant water-based adhesive are uniformly mixed at a mass ratio of 1:1.2, vacuum degassing for 3-5 minutes, and uniformly coated on the upper surface of the heat insulation buffer bottom layer using a precision coating machine. The coating thickness is controlled at 0.3-0.5 mm, and cured at room temperature for 2-3 hours to form an integrated fire extinguishing core layer.

9. The method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to claim 5, characterized in that, In step S4, a multi-layer composite bonding process is performed. The specific steps are as follows: a dustproof and flame-retardant surface layer is bonded to the upper surface of the fire extinguishing core layer, and a heat-insulating and buffering bottom layer is bonded to the lower surface. The bonding process is carried out using a low-temperature hot-pressing process, controlling the hot-pressing temperature at 40-45℃, the pressure at 0.3-0.5MPa, and the hot-pressing time at 8-12s to ensure that each layer is free of air bubbles and tightly bonded.

10. A method for preparing a microcapsule active fire extinguishing patch for a power strip socket according to claim 5, characterized in that, In step S5, the adhesive layer and protective layer are prepared. The specific steps are as follows: a modified silicone pressure-sensitive adhesive is uniformly coated on the lower surface of the heat insulation buffer layer with a coating thickness of 0.1-0.2 mm. The coating is left to dry at room temperature for 10-15 minutes to form a high-temperature resistant adhesive layer. Finally, a PET release protective layer is attached. In step S6, the cutting, testing, and packaging of the finished product are carried out. The specific steps are as follows: the patch is cut according to the general specifications of the plug board and socket. The smoke and temperature triggering performance, adhesive strength, and high-temperature aging resistance are tested one by one. After passing the test, the patch is vacuum-sealed to obtain the finished fire extinguishing patch.

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