Self-flame-retardant efficient fire extinguishing adhesive tape sheet and manufacturing method thereof

Abstract

According to the self-flame-retardant efficient fire-extinguishing adhesive tape sheet and the manufacturing method thereof, the flame-retardant adhesive tape sheet, the fire-extinguishing layer and the flame-retardant protective layer are prepared in sequence, all the layers are made of efficient fireproof flame-retardant materials, the flame-retardant grade of the fire-extinguishing adhesive tape sheet is remarkably improved, and it can be guaranteed that when a fire breaks out, the fire-extinguishing adhesive tape sheet cannot be damaged; all parts of the fire extinguishing adhesive tape sheet cannot spontaneously ignite, and the fire extinguishing adhesive tape sheet can play a role in flame retardance. Wherein perfluorohexanone microbeads in the fire extinguishing layer are densely distributed in flame-retardant filling adhesive cement by adopting a vibration method, and after the perfluorohexanone microbeads are subjected to high-temperature wall breaking, gas rushes out along a crevasse and quickly reaches a fire point, so that the effect of quickly extinguishing fire is achieved. The density of the perfluorohexanone microbeads is close to a saturated state by adopting a mode that the perfluorohexanone microbeads are densely distributed, so that initial fire disasters can be quickly and efficiently extinguished, part of the perfluorohexanone microbeads are consumed in primary fire extinguishment, and the fire extinguishment sheet has the function of secondary fire extinguishment due to the rest of intact perfluorohexanone microbeads.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing materials, in particular to a self-flaming retardant and highly efficient fire extinguishing adhesive tape sheet. Background Art

[0002] With the rapid development of modern society, fire hazards are increasing day by day, especially in the fields of new energy, electricity, communications and daily life. The occurrence of fire is often accompanied by huge economic losses and casualties. Traditional fire-fighting methods, such as fire extinguishers and fire hydrants, can effectively extinguish fires to a certain extent, but they often have problems such as slow response speed and low fire-fighting efficiency in the early stage of fire fighting. Especially in some closed or narrow spaces, such as electrical cabinets, distribution boxes, communication base stations, etc., the use of traditional fire-fighting equipment is greatly restricted, and it is difficult to achieve rapid response and accurate fire fighting to the early stage of fire.

[0003] Perfluorohexanone, as an emerging green and environmentally friendly fire extinguishing agent, can absorb and take away a large amount of heat in a very short time, quickly reduce the temperature of the fire source, and thus achieve the effect of extinguishing the fire, thanks to its unique properties such as high heat capacity and high specific heat. However, although there have been attempts to make perfluorohexanone into fire extinguishing patches for application, such products still have defects such as poor fire extinguishing effect, low efficiency, and possible spontaneous combustion in actual use. This is mainly due to the unreasonable design of the perfluorohexanone content, distribution, and release method of the existing fire extinguishing patches, which has resulted in the failure to fully realize the fire extinguishing potential of perfluorohexanone. Summary of the invention

[0004] The purpose of the present invention is to provide a self-flaming retardant and highly efficient fire extinguishing tape sheet, which has highly efficient fire extinguishing and flame retardant properties, can effectively extinguish initial fires, and has high flame retardant properties, greatly enhancing the safety of various products.

[0005] To achieve the above object, the solution of the present invention is: a method for manufacturing a self-flaming retardant and highly efficient fire extinguishing tape sheet, comprising the following steps:

[0006] Step S1, making a flame retardant tape sheet:

[0007] (1) mixing high-performance glue with nitrogen-phosphorus flame retardant powder and liquid octyl phosphate flame retardant, and stirring thoroughly to obtain high-viscosity flame retardant glue;

[0008] (2) selecting a high-performance flame-retardant material as a tape sheet substrate, and attaching flame-retardant adhesive layers formed by curing a high-viscosity flame-retardant adhesive to both sides of the tape sheet substrate, and the two flame-retardant adhesive layers and the tape sheet substrate together constitute a flame-retardant tape sheet with double-sided adhesiveness;

[0009] Step S2: Making a fire extinguishing layer:

[0010] (3) 100 parts of high-performance glue and 35 to 50 parts of flame retardant powder are mixed and stirred at high speed to prepare flame retardant filling slurry, and perfluorohexanone microspheres with a particle size in the range of 350 μm to 1200 μm and a particle size difference of less than or equal to 10 μm are selected for use;

[0011] (4) The perfluorohexanone microbeads and the flame retardant filling adhesive are attached together on one adhesive surface of the flame retardant tape sheet prepared in step S1; the perfluorohexanone microbeads are densely distributed in the flame retardant filling adhesive, and the bead walls of adjacent perfluorohexanone microbeads are closely attached, and the thickness of the flame retardant filling adhesive is consistent with the particle size of the perfluorohexanone microbeads;

[0012] (5) The dense spreading method of perfluorohexanone microbeads is as follows: the perfluorohexanone microbeads are evenly sprinkled on the moving tape sheet using a vibration plate; the tape sheet moves at a speed of 5 to 8 M / min, and the vibration plate is 12 to 18 mm above the tape sheet. The perfluorohexanone microbeads are vibrated from the vibration plate to the surface of the tape sheet at a frequency of 60 to 75 Hz, and then the flatness of the perfluorohexanone microbeads and the flame retardant filling mortar is adjusted.

[0013] (6) The tape sheet covered with perfluorohexanone microbeads is baked and dried at 50°C to 75°C for 1.5 to 2 hours until the flame retardant filling glue is completely solidified, thereby completing the preparation of a fire extinguishing layer;

[0014] (7) If multiple fire extinguishing layers are to be set, repeat the operation of step S2;

[0015] Step S3, flame retardant protective layer:

[0016] (8) A flame retardant protective layer is provided on the surface of the fire extinguishing layer, wherein a flame retardant material is added to the flame retardant protective layer, and the thickness of the flame retardant protective layer is in the range of 5 to 25 μm.

[0017] Furthermore, in the process of making the flame-retardant tape sheet in step S1, a high-viscosity flame-retardant glue is first coated on the release material, dried and cured to form a flame-retardant glue layer, and then the flame-retardant glue layer is transferred to the tape sheet substrate through a roller.

[0018] Furthermore, in the preparation of the flame-retardant tape sheet in step S1, the high-performance glue is made of one or more materials selected from pure acrylic acid, silicone, phenolic resin, furan resin, polyurethane, acrylic, and epoxy resin;

[0019] Nitrogen-phosphorus flame retardant powders can be melamine cyanurate (MCA) and spirocyclic phosphorylphenyl melamine ester (SPDAPT);

[0020] Liquid octyl phosphate flame retardants can be selected from trioctyl phosphate, phosphate esters, and phosphonate ester flame retardants;

[0021] The tape base material is made of high-performance flame retardant materials such as flame retardant tissue paper, flame retardant PET, flame retardant PC, PVC, silicone tape, flame retardant foam, aluminum foil, etc.

[0022] Furthermore, in the preparation of the flame retardant tape sheet in step S1, the thickness of the single flame retardant adhesive layer is in the range of 15 μm to 100 μm.

[0023] Furthermore, in the preparation of the flame retardant filling adhesive in step S2, the high-performance adhesive is selected from acrylic acid, silicone, phenolic resin, furan resin, polyurethane, acrylic, and epoxy resin;

[0024] The flame retardant powder is selected from one or more of aerogel powder, calcium carbonate powder, high molecular weight polymer resin, rubber filling powder, urea-formaldehyde resin powder, fine silicon powder, red phosphorus powder and the like.

[0025] Furthermore, in the preparation process of the fire extinguishing layer in step S2, the flame retardant filling adhesive is first evenly coated on one adhesive surface of the flame retardant tape sheet prepared in step S1 by a machine scraper, and the thickness of the flame retardant filling adhesive is consistent with the particle size of the perfluorohexanone microbeads; then the flame retardant tape sheet coated with the flame retardant filling adhesive is baked at a low temperature, and when the flame retardant filling adhesive is slightly dry and viscous, the perfluorohexanone microbeads are tightly and evenly distributed on the flame retardant filling adhesive, and then a slight pressure is applied to the perfluorohexanone microbeads to allow the perfluorohexanone microbeads to sink to the surface of the flame retardant tape sheet, and then baked and dried again.

[0026] Furthermore, in the preparation method of the fire extinguishing sheet in step S2, the perfluorohexanone microbeads are first evenly and densely distributed on one adhesive surface of the flame retardant tape sheet, and then the flame retardant filling slurry is poured into the gaps of the perfluorohexanone microbeads, and the excess slurry is scraped off with a scraper to make the surface smooth. The poured thickness is greater than or equal to the particle size of the perfluorohexanone microbeads.

[0027] Furthermore, when multiple fire extinguishing layers are required, the third fire extinguishing layer is close to the fire point, and the first fire extinguishing layer is close to the bottom flame retardant tape sheet. The particle size of the perfluorohexanone microbeads gradually decreases from the bottom layer to the surface layer.

[0028] Furthermore, in step S3, the type of the flame retardant protective layer is a non-sticky flame retardant protective adhesive layer, a sticky flame retardant protective adhesive layer or a molded flame retardant film.

[0029] A self-flame retardant and high-efficiency fire extinguishing tape sheet is prepared by the above-mentioned manufacturing method of the self-flame retardant and high-efficiency fire extinguishing tape sheet, comprising a flame retardant tape sheet, a fire extinguishing layer and a flame retardant protective layer which are sequentially arranged from a bottom layer to a surface layer.

[0030] After adopting the above scheme, the self-flaming retardant and high-efficiency fire-extinguishing tape sheet prepared by the method of the present invention has the following beneficial effects:

[0031] Self-flaming retardant properties:

[0032] Except for the release material and perfluorohexanone microbeads that are discarded during use, all other components of the self-flaming retardant and high-efficiency fire-extinguishing tape sheet of the present invention are made of high-efficiency fire-retardant materials, which significantly improves the flame retardancy level. This can ensure that when a fire occurs, the various parts of the fire-extinguishing tape sheet will not spontaneously combust, and it can also play a flame retardant role.

[0033] High efficiency and fixed-point fire extinguishing features:

[0034] The fire extinguishing function of the self-flame retardant and high-efficiency fire extinguishing tape is mainly due to the perfluorohexanone gas in the perfluorohexanone microbeads. After the perfluorohexanone microbeads break through the wall, the gas rushes out along the broken hole and quickly reaches the fire point, achieving the effect of rapid fire extinguishing.

[0035] The fire extinguishing layer is composed of tightly arranged perfluorohexanone microbeads and flame retardant filling glue. The dense distribution of perfluorohexanone microbeads makes the density of perfluorohexanone microbeads close to saturation, so that it can quickly and efficiently extinguish initial fires. Moreover, part of the perfluorohexanone microbeads are consumed in one fire extinguishing, and the remaining intact perfluorohexanone microbeads enable the fire extinguishing sheet to have the function of second fire extinguishing.

[0036] In addition, because the glue tightly wraps the fluorohexanone microbeads around except the top, the fluorohexanone microbeads break through the wall under the action of the high temperature of the flame, and the gas will be fixedly ejected from the top, avoiding the spraying inside the fire extinguishing tape, affecting the fire extinguishing distance and efficiency, and achieving fixed-point fire extinguishing.

[0037] The flame retardant protective layer on the top of the fire extinguishing layer has flame retardant, heat insulation and anti-extrusion effects, which can effectively protect the perfluorohexanone microbeads and prevent the perfluorohexanone microbeads from breaking through the wall in advance and losing the fire extinguishing effect. In addition, the thickness of the flame retardant protective layer is controlled at 5μm to 25μm, which protects the perfluorohexanone microbeads while not affecting the gas ejection effect of the perfluorohexanone microbeads.

[0038] Strong and durable:

[0039] During the production process, each layer uses materials that can be fused with each other. After the materials are dried, they are tightly combined to form an integrated whole. Compared with the existing technology of laminating double-sided tape at a later stage, the bonding strength of the various components is greatly improved, and various problems caused by the loose adhesion of double-sided tape are effectively eliminated.

[0040] Wide range of applications:

[0041] The self-flaming retardant and efficient fire extinguishing tape of the present invention can not only provide effective preventive measures for the potential heating, combustion and even explosion hazards in the new energy industry, but can also be applied to various electrical facilities of the State Grid to ensure power safety; at the same time, it is also suitable for electrical equipment in distribution boxes of factories, enterprises and households, as well as fire protection of office spaces and household appliances, greatly improving the safety level in these environments. In addition, in the field of communication facilities, such as the security protection of 4G / 5G base stations, the fire extinguishing tape also plays an indispensable role, providing a solid security guarantee for the stable operation of the communication network.

[0042] Safety and environmental protection:

[0043] The materials used to make this product all comply with international and national standards regarding hazardous substances, meet environmental protection requirements, and are safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the laminar structure of the self-flaming retardant and highly efficient fire extinguishing tape of the present invention (single-layer fire extinguishing layer);

[0045] Figure 2 It is a schematic diagram of dense distribution of perfluorohexanone micro beads in the fire extinguishing layer of the self-flammability retardant high-efficiency fire extinguishing tape sheet of the present invention;

[0046] Figure 3 It is a schematic diagram of the laminar structure of the self-flaming retardant and highly efficient fire extinguishing tape of the present invention (multi-layer fire extinguishing layer).

[0047] Description of labels:

[0048] 1. Release layer;

[0049] 2. Flame retardant adhesive tape; 21. First flame retardant adhesive layer; 22. Adhesive tape base material layer; 23. Second flame retardant adhesive layer;

[0050] 3. Fire extinguishing layer; 31. Flame retardant filling rubber layer; 32. Perfluorohexanone microbeads; 301. First fire extinguishing layer; 302. Second fire extinguishing layer; 303. Third fire extinguishing layer;

[0051] 4. Flame retardant protective layer. DETAILED DESCRIPTION

[0052] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] The present invention provides a self-flaming retardant and highly efficient fire extinguishing adhesive tape sheet, such as Figure 1 As shown, it includes a release layer 1, a flame retardant tape sheet 2, a fire extinguishing layer 3 and a flame retardant protective layer 4 which are arranged in sequence.

[0054] The release layer 1 is used to protect the adhesive surface and prevent sticking, which is conducive to the winding, stacking and placement of the fire extinguishing tape. The release layer 1 is a release paper, release film or other releasable material, which is selected according to different requirements of the use occasion and use method.

[0055] The flame retardant tape sheet 2 has a very high adhesive property, can be firmly adhered to the surface of the material for a long time, and has its own flame retardant effect, and its flame retardant grade reaches the UL94 V0 standard.

[0056] The flame retardant tape sheet 2 is composed of a first flame retardant adhesive layer 21, a tape sheet substrate layer 22 and a second flame retardant adhesive layer 23. The tape sheet substrate layer 22 is used as the substrate of the flame retardant tape sheet 2. According to the application environment requirements, high-performance flame retardant materials such as flame retardant tissue paper, flame retardant PET, flame retardant PC, PVC, silicone tape, flame retardant foam, aluminum foil, etc. can be selected to ensure the flame retardant effect without supporting combustion.

[0057] The first flame retardant adhesive layer 21 and the second flame retardant adhesive layer 23 are respectively located on the two sides of the tape sheet substrate layer 22. The flame retardant adhesive layers 21 and 23 are cured by high-viscosity flame retardant adhesive mixed with high-performance glue, nitrogen-phosphorus flame retardant powder, liquid octyl phosphate flame retardant, and curing agent. The raw material high-performance glue here can be made of one or more materials selected from pure acrylic acid, silicone, phenolic resin, furan resin, polyurethane, acrylic, and epoxy resin. The dry glue thickness of the flame retardant adhesive layer is controlled to be 15μm to 100μm.

[0058] Nitrogen-phosphorus flame retardant powders may include melamine cyanurate (MCA), spirocyclic phosphorylphenyl melamine ester (SPDAPT), etc., but are not limited thereto;

[0059] Liquid octyl phosphate flame retardants may include trioctyl phosphate, phosphate esters, phosphonate ester flame retardants, etc., but are not limited thereto;

[0060] The first flame retardant adhesive layer 21 of the flame retardant adhesive tape sheet 2 is the bottom adhesive surface, which is used to adhere to the surface of the use environment. The thickness of this layer of dry adhesive is preferably controlled at 35μm to 80μm, depending on the strength of the required bonding surface. The tape sheet substrate layer 22 plays a role in supporting and increasing the tensile strength. The second flame retardant adhesive layer 23 is used to bond the fire extinguishing layer 3. The thickness of this layer of dry adhesive is preferably controlled at 15μm to 30μm.

[0061] The fire extinguishing layer 3, facing the object that needs to be extinguished (hereinafter referred to as the fire point), is composed of a flame retardant filling rubber layer 31 and densely distributed perfluorohexanone microbeads 32. The perfluorohexanone microbeads 32 are also called fire extinguishing microcapsules. The perfluorohexanone microbeads 32 used in the present invention are purchased from Hefei Zhongke Chuangwei Technology Co., Ltd. Figure 2The fire extinguishing function of the fire extinguishing tape piece is mainly due to the perfluorohexanone gas in the perfluorohexanone microbeads 32. Under the action of the high temperature of the flame, the perfluorohexanone microbeads 32 break through the wall, and the gas inside rushes out along the break and quickly reaches the fire point, achieving the effect of rapid fire extinguishing.

[0062] The flame retardant filling adhesive layer 31 is formed by curing a flame retardant filling adhesive mortar mixed with 100 parts of high-performance glue and 35 to 50 parts of flame retardant powder. The high-performance glue in this layer is selected from acrylic acid, silica gel, phenolic resin, furan resin, polyurethane, acrylic, epoxy resin, etc., and the flame retardant powder includes one or more of aerogel powder, calcium carbonate powder, polymer polymer resin, rubber filling powder, urea-formaldehyde resin powder, fine silicon powder, red phosphorus powder, etc. When the flame instantly burns to the surface of the fire extinguishing tape, the flame retardant filling adhesive layer 31 plays a flame retardant role. At the same time, the mixture of flame retardant powder and glue will also play a heat insulation role after drying, preventing heat conduction from causing the surrounding part of the perfluorohexanone microbeads 32 without flames to break the wall, so that after the fire point is extinguished, the fire extinguishing piece will also play a role in the hidden dangers in other places.

[0063] The perfluorohexanone microbeads 32 with fire extinguishing function are evenly and densely distributed in the flame retardant filling adhesive layer 31, and there is almost no gap between adjacent perfluorohexanone microbeads 32. The gaps between the particle sizes of the perfluorohexanone microbeads 32 are filled with the flame retardant filling adhesive, which plays a fixing role on the perfluorohexanone microbeads 32. In addition, since the flame retardant filling adhesive wraps the perfluorohexanone microbeads 32 around except the top, when the perfluorohexanone microbeads 32 are broken, the gas can only be sprayed from the top to perform targeted fire extinguishing.

[0064] Since the boiling point of perfluorohexanone is 49°C, and the temperature of many electrical use environments is much higher than this temperature, in order to avoid false triggering of the perfluorohexanone microbeads 32, the selected perfluorohexanone microbeads 32 must have a suitable bead wall, and the wall breaking temperature must be controlled above 80°C. The preferred wall breaking temperature range is 120°C to 160°C. The wall breaking temperature varies according to the different particle sizes of the perfluorohexanone microbeads 32 and the thickness of the flame retardant protective layer 4.

[0065] Since the perfluorohexanone microbeads 32 will be squeezed to a certain extent during the process of making the fire extinguishing tape and the actual use, the wall thickness of the perfluorohexanone microbeads 32 should be not easy to break. At present, most of the perfluorohexanone microbeads 32 on the market use gelatin and gum arabic as the bead wall. The perfluorohexanone microbeads 32 with too small particle size are difficult to withstand pressure. In order to ensure the wall breaking temperature and pressure resistance, the perfluorohexanone microbeads 32 of the present invention use a particle size of 350μm to 1200μm.

[0066] The reason for using perfluorohexanone microbeads 32 with a particle size of 350μm to 1200μm is that the perfluorohexanone microbeads 32 in this particle size range can carry more perfluorohexanone materials, which plays a key role in active fire extinguishing. Moreover, in many applications, a small amount of perfluorohexanone gas is not enough to extinguish the fire source at the fire point. If the fire source is not extinguished in time, and the perfluorohexanone microbeads 32 facing the fire extinguishing sheet have broken through the wall and cannot extinguish the fire, the occurrence of the fire cannot be contained. Perfluorohexanone microbeads 32 with slightly larger particle sizes can release enough fire extinguishing gas because they have more perfluorohexanone gas inside, and the distance and range that can be sprayed are also much larger. For example, using a fire extinguishing sheet with 500μm perfluorohexanone microbeads 32 in diameter, with a protective film of 15μm thickness, facing the fire source and 15mm away from the fire source, the fire extinguishing time is within 1.5S. Only a small amount of perfluorohexanone microbeads 32 are needed to activate the fire to achieve the purpose of the first fire extinguishing. If a fire breaks out again at the same or nearby point, the fire extinguishing sheet can still play a role.

[0067] The number of the fire extinguishing layer 3 can be only one layer or multiple layers. Figure 3 As shown, the third fire extinguishing layer 303 is near the fire point, and the first fire extinguishing layer 301 is near the flame retardant tape sheet 2. The particle size of the perfluorohexanone microbeads 32 gradually decreases from the bottom layer to the surface layer. In the same fire extinguishing layer 3, the particle size difference of the perfluorohexanone microbeads 32 does not exceed 10 μm.

[0068] The flame retardant protective layer 4 covers the surface of the perfluorohexanone microbeads 32 of the fire extinguishing layer 3 and plays a role in protecting the perfluorohexanone microbeads 32. Since the bead wall of the perfluorohexanone microbeads 32 is relatively thin, the exposed part is easily broken by the external force and the long-term ambient temperature. Moreover, the flame retardant filling glue will shrink and harden after drying. The exposed part of the upper layer of the perfluorohexanone microbeads 32 needs a protective layer with moderate hardness and softness.

[0069] The thickness of the flame retardant protective layer 4 is controlled within 5 μm to 25 μm. If it is too thick, it will affect the gas ejection effect of the perfluorohexanone microbeads 32, and if it is too thin, it will not protect the perfluorohexanone microbeads 32. In practical applications, the thickness of the protective film layer is preferably controlled within 15 μm ± 2 μm.

[0070] The flame retardant protective layer 4 has the following three forms: it can be a non-sticky flame retardant protective adhesive layer, a formed flame retardant film, or a sticky flame retardant protective adhesive layer.

[0071] (1) Non-sticky flame-retardant protective adhesive layer: It is formed by mixing and curing film-forming glue, 15 to 25 parts of red phosphorus powder or 20 to 30 parts of phosphorus-nitrogen flame-retardant powder. Red phosphorus powder and phosphorus-nitrogen flame-retardant powder play a flame-retardant role. The film layer formed after the mixed glue is dried has a non-sticky surface and is used to protect the surface of the perfluorohexanone microbeads 32. In addition, the film layer is flat and smooth, which is convenient for subsequent processing and use. Among them, the film-forming glue can be selected from film-forming acrylic glue, silicone, polyurethane glue, epoxy resin glue, acrylic glue, etc. Using the non-sticky flame-retardant protective adhesive layer, after the fire extinguishing layer 3 is completed and the flame-retardant filling glue is completely dry, the above-mentioned mixed glue can be directly applied to the surface of the fire extinguishing layer 3, and dried at 50 to 75°C for 2 hours.

[0072] (2) Molded flame-retardant film: flame-retardant polyethylene, flame-retardant polypropylene, flame-retardant nylon, flame-retardant PVC, flame-retardant PC, flame-retardant tissue paper, flame-retardant PET and other materials can be directly attached to the surface for use. When using a molded flame-retardant film, it is necessary to first apply flame-retardant glue on one side of the flame-retardant film, and then attach it to the surface of the fire extinguishing layer 3.

[0073] (3) The flame retardant protective layer 4 can also be a viscous flame retardant protective adhesive layer: specifically, 100 parts of high-viscosity glue are mixed with 15-25 parts of red phosphorus powder or 20-30 parts of phosphorus nitrogen flame retardant powder and 3-5 parts of liquid octyl phosphate flame retardant to obtain a high-viscosity flame retardant adhesive. Among them, the high-viscosity glue can be pure acrylic acid, silica gel, phenolic resin, furan resin, polyurethane, acrylic, epoxy resin and other materials. The high-viscosity flame retardant adhesive can withstand high temperatures, and the temperature resistance temperature is 80-120°C. Only the fireproof points are bonded. When a fire occurs, the flame retardant protective layer 4 is burned first, and then the perfluorohexanone microbeads 32 break the wall, and the gas rushes out to play a role in extinguishing the fire. When using high-viscosity flame retardant adhesive, after the flame retardant filling glue of the fire extinguishing layer 3 is completely dried, it can be directly coated on the surface of the fire extinguishing layer 3, and the wet glue coating thickness is 20μm-30μm. Drying conditions: Dry at 50-75℃ for 2 hours, and it can be put into use after the glue is cured.

[0074] The flame retardant protective layer 4 can not only protect the surface of the perfluorohexanone microbeads 32, but also play a certain role in heat insulation, preventing the perfluorohexanone microbeads 32 from breaking through the wall prematurely and losing the fire extinguishing effect. When the external temperature is lower than 75°C, the internal perfluorohexanone microbeads 32 will not be triggered. Only when the external temperature reaches above 80°C, the flame retardant protective layer 4 begins to soften, and further as the temperature rises, the perfluorohexanone microbeads 32 are triggered to break through the wall, and the gas is ejected from the side of the damaged flame retardant protective layer 4, achieving the effect of extinguishing the fire. Since flame retardant materials are added to the flame retardant protective layer 4, it has a flame retardant effect. Therefore, the residues and drippings after the flame burns will not carry flames, and will not cause secondary fires.

[0075] In actual use, the self-flame-retardant and high-efficiency fire-extinguishing tape is attached to the front of the corresponding product, so that the flame-retardant protective layer 4 is facing the part of the facility that needs to be extinguished and prevented. The surface of the flame-retardant protective layer 4 is 1mm to 20mm away from the fire prevention point, and should not be too far. The optimal distance is 10mm. When the flame burns the flame-retardant protective layer 4, the flame-retardant protective layer 4 begins to soften. As the temperature increases, the perfluorohexanone microbeads 32 are triggered to break the wall, and the gas is ejected from the side of the damaged flame-retardant protective layer 4 toward the fire source, achieving the effect of extinguishing the fire. In addition, because the flame-retardant filling mortar of the fire extinguishing layer 3 wraps the perfluorohexanone microbeads 32 around except the top, when the perfluorohexanone microbeads 32 break, the gas can only be ejected from the top to extinguish the fire at a fixed point.

[0076] The self-flaming retardant and efficient fire extinguishing tape sheet of the present invention is made of highly efficient fireproof and flame retardant materials, except for the release material and the perfluorohexanone microbeads 32 discarded during use. This can ensure that when a fire occurs, the various parts of the fire extinguishing tape sheet will not spontaneously combust, and can also play a flame retardant role. In particular, when the fire source does not appear on the front of the fire extinguishing tape sheet, but appears around the fire extinguishing tape sheet, the fire extinguishing tape sheet can also play a flame retardant effect. Since the composition of the fire extinguishing tape sheet, in addition to the perfluorohexanone microbeads 32, also has a lot of auxiliary materials, when the fire source is extinguished, the remaining fire burns on the flame retardant material and will not catch fire, and even if it drips, it will not carry flames, and will not form a secondary fire.

[0077] The manufacturing method of the self-flaming retardant high-efficiency fire extinguishing adhesive tape sheet of the present invention is as follows:

[0078] Step S1, making flame retardant tape sheet 2:

[0079] Preparation of high-viscosity flame-retardant glue: high-performance glue, nitrogen-phosphorus flame-retardant powder and liquid octyl phosphate flame retardant are mixed according to the ratio, and the mixture is fully stirred to obtain high-viscosity flame-retardant glue;

[0080] First, the high-viscosity flame-retardant glue is evenly coated on the release material by a scraper, and then heated in an oven to volatilize the solvent in the glue and solidify it to form a first flame-retardant glue layer 21. Then, the dried and solidified first flame-retardant glue layer 21 is transferred to the tape sheet substrate layer 22 by a pressure roller to form a single-sided tape.

[0081] Then, a machine scraper is used to apply the high-viscosity flame-retardant glue on another release material, and after being dried in an oven, a second flame-retardant adhesive layer 23 is formed. The second flame-retardant adhesive layer 23 is transferred to the other side of the above-mentioned tape sheet substrate layer 22 by a pressure roller to form a flame-retardant tape sheet 2.

[0082] The release material on the adhesive surface of the second flame retardant adhesive layer 23 is peeled off, and the release material on the adhesive surface of the first flame retardant adhesive layer 21 is retained and rolled up for later use.

[0083] Step S2, making fire extinguishing layer 3:

[0084] Mix 100 parts of high-performance glue with 35-50 parts of flame retardant powder, and stir at high speed to make flame retardant filling glue;

[0085] Fire extinguishing layer 3 production method 1:

[0086] The flame retardant filling glue is evenly coated on one adhesive surface of the flame retardant tape sheet 2 prepared in step S1 by a machine scraper, and the thickness of the flame retardant filling glue is consistent with the particle size of the perfluorohexanone microbeads 32. The flame retardant tape sheet 2 coated with the flame retardant filling glue is baked at a low temperature. When the flame retardant filling glue is slightly dry and sticky, the perfluorohexanone microbeads 32 are tightly and evenly distributed on the flame retardant filling glue. Slightly apply pressure on the perfluorohexanone microbeads 32 to allow the perfluorohexanone microbeads 32 to sink to the surface of the flame retardant tape sheet 2.

[0087] Fire extinguishing layer 3 production method 2:

[0088] The adhesive property of the flame retardant tape sheet 2 is used to pre-fix the perfluorohexanone microbeads 32, and the perfluorohexanone microbeads 32 are evenly and densely distributed on the adhesive surface. For example, the perfluorohexanone microbeads 32 are densely distributed on the surface of the second flame retardant adhesive layer 23 of the flame retardant tape sheet 2, and the perfluorohexanone microbeads 32 are slightly bonded to the adhesive surface and will not fall off. Then the perfluorohexanone microbeads 32 can be slightly moved to adjust the gaps to ensure the close arrangement of the perfluorohexanone microbeads 32. Then, the flame retardant filling slurry is poured into the gaps of the perfluorohexanone microbeads 32, and the excess slurry is scraped off with a scraper to make the surface flat. The thickness of the pouring is equal to or slightly larger than the particle size of the perfluorohexanone microbeads 32.

[0089] The dense distribution method of perfluorohexanone microbeads 32 is:

[0090] Use a vibration plate to evenly sprinkle on the moving tape piece. The flame retardant tape piece 2 moves at a speed of 5 to 8 M / min. The vibration plate is 15 mm above the tape piece, and the perfluorohexanone microbeads 32 with a particle size of 350 μm to 1200 μm are vibrated from the vibration plate to the surface of the tape piece at a frequency of 60 to 75 Hz. The material moving speed and the vibration frequency of the vibration plate are adjusted according to the different particle sizes of the perfluorohexanone microbeads 32. The larger the particle size, the lower the frequency, so as to achieve the purpose of uniform and dense distribution. After dense distribution, the bead walls of adjacent perfluorohexanone microbeads 32 are tightly attached.

[0091] By using the above-mentioned method for making the fire extinguishing layer 3, taking the perfluorohexanone microbeads 32 with a particle size of 500 μm as an example, 3700 to 4100 perfluorohexanone microbeads 32 can be densely distributed on a plane of 30 mm×30 mm.

[0092] Then the flame retardant tape sheet 2 with the densely covered perfluorohexanone microbeads 32 is baked again until the flame retardant filling mortar is completely solidified, that is, a layer of fire extinguishing layer 3 is completed. The drying temperature of the flame retardant filling mortar should not be too high, and should be within the range of 50°C to 75°C, and the time should be 1.5 to 2 hours. Here, the flame retardant filling mortar should be fully dried and solidified before the next process is carried out to fix the perfluorohexanone microbeads 32 and isolate the air. In addition, it can also prevent the late volatilization of the glue solvent from destroying the protective layer and forming atmospheric pressure on the perfluorohexanone microbeads 32, thereby destroying the wall of the perfluorohexanone microbeads 32.

[0093] In special occasions, such as closed electrical cabinets and base station control cabinets, safer and more reliable fire protection functions are required, and multiple layers of fire extinguishing layers 3 can be superimposed. When multiple layers of fire extinguishing layers 3 need to be superimposed, it is necessary to apply 8-12μm flame retardant glue on the previously prepared fire extinguishing layer 3, place it in an oven at 50-70℃ / 20min, take it out, and then repeat one of the two methods of making the perfluorohexanone microbead 32 fire extinguishing layer 3, and superimpose the second layer, the third layer, etc. on the original fire extinguishing layer 3 according to requirements.

[0094] When there are multiple layers of perfluorohexanone microbeads 32 fire extinguishing layers 3, considering that the larger the particle size of the perfluorohexanone microbeads 32, the thicker the bead wall is, the larger the particle size of the bottom layer of perfluorohexanone microbeads 32 is, and the upper layer of the fire extinguishing layer 3 closer to the potential fire source is selected with a smaller particle size of perfluorohexanone microbeads 32. If three layers of fire extinguishing layers 3 are required to be stacked, the first fire extinguishing layer 301 close to the flame retardant tape sheet 2 uses 950-1200μm perfluorohexanone microbeads 32, the second fire extinguishing layer 302 uses 600-900μm perfluorohexanone microbeads 32, and the third fire extinguishing layer 303 close to the fire source uses 350-500μm perfluorohexanone microbeads 32.

[0095] When a fire occurs, the perfluorohexanone microbeads 32 near the fire source first break the wall to extinguish the fire. Since the bead wall of the lower layer of perfluorohexanone microbeads 32 is relatively thick and far away from the fire source, it will not be triggered during the first fire extinguishing process. After the surface layer of perfluorohexanone fire extinguishing layer 3 extinguishes the fire point, the lower perfluorohexanone fire extinguishing layer 3 is still intact, which can prevent a second fire. If the fire is large, the fire extinguishing perfluorohexanone microbeads 32 of the surface layer of perfluorohexanone fire extinguishing layer 3 have broken the wall and lost their effect, and still failed to extinguish the fire source, and the high temperature is transmitted to the lower layer of perfluorohexanone fire extinguishing layer 3, and the lower layer of perfluorohexanone microbeads 32 break the wall to extinguish the fire. By analogy, the fire extinguishing sheet can effectively extinguish the fire for the second and third time.

[0096] Step S3, making a flame retardant protective layer 4:

[0097] The type of flame retardant protective layer 4 is selected according to the requirements, which can be a non-sticky flame retardant protective adhesive layer, a formed flame retardant film or a sticky flame retardant protective adhesive layer. The corresponding glue is configured according to the selection, which can be a non-sticky flame retardant protective glue or a sticky flame retardant protective glue.

[0098] After the fire extinguishing layer 3 is made and the flame retardant filling glue is completely dried, the flame retardant protective glue is evenly coated on the surface of the fire extinguishing layer 3 after the glue is dried, and the surface is flattened with a scraper. Alternatively, high-performance flame retardant glue (the glue used to make the flame retardant tape sheet 2) is applied to the formed flame retardant film and then attached to the surface of the perfluorohexanone microbeads 32 to replace the above-mentioned film layer.

[0099] Place the fire-extinguishing tape coated with non-sticky flame-retardant protective glue at room temperature for 1 hour to allow the glue to flow naturally, and then put it into an oven and dry it at 50-75°C for 2 hours to form a non-sticky flame-retardant protective glue layer. The surface of the film is smooth and non-sticky. Alternatively, dry the fire-extinguishing tape coated with sticky flame-retardant protective glue at 50-75°C for 2 hours to solidify and form a sticky flame-retardant protective glue layer.

[0100] Here, whether it is the flame retardant protective rubber layer or the molded flame retardant film, the thickness is controlled at 5μm to 25μm, and a better choice is to control it at 15μm±2μm to ensure that the impact force of the perfluorohexanone microbeads 32 can break through the protective layer without affecting the fire extinguishing performance.

[0101] The perfluorohexanone fire extinguishing tape sheet master roll is rolled up by the winder. Finally, the perfluorohexanone fire extinguishing tape sheet master roll is cut into fire extinguishing tape sheets of appropriate sizes according to the customer's requirements to complete the production of the finished product.

[0102] Example 1

[0103] Step S1, making flame retardant tape sheet 2:

[0104] S1.1. Preparation of high-viscosity flame-retardant glue: Add 25 parts of nitrogen-phosphorus flame-retardant powder and 3 parts of liquid octyl phosphate flame retardant and an appropriate amount of curing agent into 100 parts of high-performance glue, and stir well in a stainless steel container to form high-viscosity flame-retardant glue.

[0105] S1.2, the prepared high viscosity flame retardant glue is evenly coated on the release material by a scraper, and heated in an oven at 120°C for 3 minutes to volatilize the solvent in the glue, so that it solidifies to form a first flame retardant glue layer 21. Select flame retardant tissue paper as the tape sheet substrate layer 22, and transfer the dried and solidified first flame retardant glue layer 21 to the flame retardant tissue paper through a pressure roller to form a single-sided tape. The dry glue thickness of the first flame retardant glue layer 21 is 40μm, and the thickness of the flame retardant tissue paper is 35μm.

[0106] S1.3, use a machine scraper to apply the high-viscosity flame-retardant glue on another release material, and after drying in an oven at 120°C for 3 minutes, form a second flame-retardant adhesive layer 23, and transfer the second flame-retardant adhesive layer 23 to the other side of the flame-retardant tissue paper through a pressure roller to form a flame-retardant adhesive tape sheet 2. Peel off the release material on the adhesive surface of the second flame-retardant adhesive layer 23, retain the release material on the adhesive surface of the first flame-retardant adhesive layer 21, and roll it up for use.

[0107] S1.4, the adhesive surface of the second flame retardant adhesive layer 23 is the adhesive surface that is attached to the surface of the perfluorohexanone microbeads 32, and the dry adhesive thickness is 20 μm. The total thickness of the flame retardant adhesive tape sheet 2 is 90 μm.

[0108] Step S2, making fire extinguishing layer 3:

[0109] S2.1. Add 15 parts of red phosphorus powder and 30 parts of fine silicon powder to 100 parts of high-performance glue, and stir at high speed for 20 minutes to make a flame-retardant filling mortar.

[0110] S2.2, adopting the first method for making the fire extinguishing layer 3: using a machine scraper to evenly apply the prepared flame retardant filling adhesive paste on the adhesive surface of the second flame retardant adhesive layer 23 of the flame retardant adhesive tape piece 2 prepared in step S1 with a thickness of 800 μm of wet adhesive.

[0111] S2.3, the flame retardant tape piece 2 coated with flame retardant filling glue is baked in a 60°C oven for 15 minutes. At this time, the glue has evaporated and the thickness has been reduced to about 500 μm, that is, the dry glue thickness.

[0112] S2.4. When the flame retardant filling glue is slightly dry and sticky, use a vibrating plate to evenly sprinkle it on the moving material. The vibrating plate is 15 mm above the tape piece. The bottom flame retardant tape piece 2 moves at a speed of 6 m / min. The vibration frequency of the vibrating plate is 75 Hz.

[0113] S2.5, select perfluorohexanone microbeads 32 with a particle size of 500 μm, and make the perfluorohexanone microbeads 32 densely and evenly spread on the flame retardant filling slurry, and use a roller to slightly apply pressure on the perfluorohexanone microbeads 32 to allow the perfluorohexanone microbeads 32 to sink to the surface of the flame retardant tape sheet 2. Keep a gap of 0.5 mm between the roller and the surface adhesive layer of the bottom flame retardant tape sheet 2.

[0114] S2.6. The flame retardant tape piece 2 with the perfluorohexanone microbeads 32 is placed in a 60° C. oven and dried for 2 hours. At this time, the flame retardant filling adhesive is completely solidified.

[0115] Step S3, making a flame retardant protective layer 4:

[0116] S3.1. Add 20 parts of red phosphorus powder and 1 part of aziridine series curing agent to pure acrylic glue and stir for 20 minutes to make a non-sticky flame retardant protective glue.

[0117] S3.2. After the flame retardant filling glue is dried, apply the non-sticky flame retardant protective glue evenly on the surface of the perfluorohexanone microbeads 32 of the perfluorohexanone tape piece, and use a scraper to flatten the surface.

[0118] The non-stick flame retardant protective glue is set to 50% solid content, and the wet glue coating thickness is 30μm.

[0119] S3.3. Place the fire extinguishing tape coated with non-sticky flame retardant protective glue at room temperature for 1 hour to allow it to level naturally, and then put it into an oven at 50℃ for 2 hours to dry.

[0120] The flame retardant protective layer 4 after drying has a thickness of 15 μm and a smooth and non-sticky surface.

[0121] S3.4. The perfluorohexanone fire extinguishing tape sheet master roll is rolled up by the winder. According to the customer's requirements, the perfluorohexanone fire extinguishing tape sheet master roll is cut into fire extinguishing tape sheets of appropriate sizes to complete the production of finished products.

[0122] Example 2

[0123] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0124] The difference between this embodiment and embodiment 1 is that in step S1.2 of this embodiment, the tape sheet substrate is flame-retardant PET, and the dried and solidified high-viscosity flame-retardant glue is transferred to the flame-retardant PET through a pressure roller to form a single-sided tape. The thickness of the flame-retardant PET is 50 μm, the dry glue thickness of the first flame-retardant glue layer 21 is 35 μm, and the rest is the same as in embodiment 1. The total thickness of the flame-retardant tape sheet 2 is 100 μm, and the rest of the ratios and preparation methods are exactly the same as in embodiment 1.

[0125] Example 3

[0126] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0127] The difference between this embodiment and embodiment 1 is that in step S2.1 of this embodiment, when preparing the flame retardant filling mortar, the proportion of each component is changed, 15 parts of red phosphorus powder and 50 parts of fine silicon powder are added to 100 parts of high-performance glue, and the flame retardant filling mortar is prepared after high-speed stirring for 20 minutes. At this time, the solid content of the mortar has been increased from 50% to 65%. The rest of the proportions and preparation methods are exactly the same as those in embodiment 1.

[0128] Example 4

[0129] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0130] The difference between this embodiment and embodiment 1 is that in step S2.5 of this embodiment, perfluorohexanone is selected as perfluorohexanone microbeads 32 with a particle size of 1000 μm. As the particle size of perfluorohexanone microbeads 32 increases, the corresponding parameters of steps S2.2, S2.3, S2.4, and S2.5 need to be changed, specifically:

[0131] S2.2. Using the first method for making the fire extinguishing layer 3: the prepared flame retardant filling adhesive paste is evenly coated on the adhesive surface of the second flame retardant adhesive layer 23 of the flame retardant adhesive tape piece 2 prepared in step S1 by a machine scraper, and the thickness of the adhesive is 1900 μm.

[0132] S2.3, the flame retardant tape piece 2 coated with flame retardant filling glue is baked in a 60°C oven for 20 minutes. At this time, the glue has evaporated and the thickness has been reduced to about 1200 μm.

[0133] S2.4. When the flame retardant filling mortar is slightly dry and sticky, use a vibrating plate to evenly sprinkle it on the moving material, so that the perfluorohexanone microbeads 32 fall on the flame retardant filling mortar. The moving speed of the bottom material is 8M / min, and the sprinkling frequency is 60 Hz.

[0134] S2.5, perfluorohexanone: Select perfluorohexanone microbeads 32 with a particle size of 1000 μm, and spread the perfluorohexanone microbeads 32 tightly and evenly on the flame retardant filling slurry. Use a roller to apply slight pressure on the perfluorohexanone microbeads 32 to allow the perfluorohexanone microbeads 32 to sink to the surface of the flame retardant tape sheet 2. Keep a gap of 1 mm between the roller and the surface adhesive layer of the bottom flame retardant tape sheet 2.

[0135] The remaining proportions and preparation methods are the same as those in Example 1.

[0136] Example 5

[0137] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0138] The difference between this embodiment and embodiment 1 is that: in step S2.2, this embodiment adopts the second method for making the fire extinguishing layer 3, and utilizes the sticky characteristics of the surface of the flame retardant tape sheet 2 to evenly and densely distribute the perfluorohexanone microbeads 32 on the adhesive surface, and then pours the prepared flame retardant filling slurry into the gaps of the perfluorohexanone microbeads 32, and scrapes off the excess slurry with a scraper to make the surface smooth, and the pouring thickness is equal to or slightly larger than the particle size of the perfluorohexanone microbeads 32. Steps S2.2 to S2.5 are all changed relative to embodiment 1, as follows:

[0139] The perfluorohexanone microbeads 32 are evenly sprinkled on the moving bottom material by a vibrating plate, so that the perfluorohexanone microbeads 32 fall on the second flame retardant adhesive layer 23 of the flame retardant adhesive tape sheet 2. The bottom material moves at a speed of 6 M / min and the sprinkling frequency is 75.

[0140] Perfluorohexanone microbeads 32 with a particle size of 500 μm are selected for perfluorohexanone, so that the perfluorohexanone microbeads 32 are tightly and evenly distributed on the adhesive surface of the flame retardant tape piece 2, and a roller is used to slightly apply pressure on the perfluorohexanone microbeads 32 to fix the perfluorohexanone microbeads 32 on the adhesive surface of the flame retardant tape piece 2, and a gap of 0.5 mm is maintained between the roller and the adhesive layer on the surface of the bottom material.

[0141] The prepared flame retardant filling glue is evenly coated on the glue surface of the second flame retardant glue layer 23 by a machine scraper, and the coating thickness of the glue exceeds the top of the perfluorohexanone microbead 32 by 20μm. The glue surface is placed at room temperature for 20 minutes with the glue surface facing up, and the glue is poured into the gaps of the perfluorohexanone microbead 32 by using its self-flowing property.

[0142] The remaining proportions and preparation methods are the same as those in Example 1.

[0143] Example 6

[0144] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0145] The difference between this embodiment and embodiment 1 is that in step S3.2 of making the flame retardant protective layer 4, the coating thickness of the protective layer glue is 50 μm, the solid content of the glue is 50%, and the thickness of the flame retardant protective layer 4 after drying and curing is 25 μm. The rest of the proportions and preparation methods are the same as those in embodiment 1.

[0146] Example 7

[0147] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0148] The difference between this embodiment and embodiment 1 is that in step S3.1 of making the surface flame retardant protective layer 4, the glue of the flame retardant protective layer 4 uses highly viscous acrylic flame retardant glue, and the specific ratio is 100 parts of glue, 20 parts of red phosphorus powder and 1 part of curing agent are added, and stirred for 20 minutes to make the protective film glue. The solid content of the glue is 50%, and the thickness of the glue coating is 40μm. After drying and curing, the thickness of the flame retardant protective layer 4 is 20μm, and its surface has relatively strong viscosity. The remaining ratios and preparation methods are the same as those of embodiment 1.

[0149] Example 8

[0150] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0151] The difference between this embodiment and embodiment 1 is that: when making the surface flame-retardant protective layer 4, this embodiment uses a formed flame-retardant film, specifically a 12μm flame-retardant PET as the protective layer, and steps S3.1 to S3.3 in embodiment 1 are cancelled. After the fire-extinguishing tape is made and the filler is completely dried, a 12μm flame-retardant PET single-sided tape must be made first. The glue uses the high-performance flame-retardant glue used to make the bottom flame-retardant tape 2, and the coating thickness of the dry glue is 13μm. The prepared PET flame-retardant single-sided tape is placed with the adhesive surface facing the perfluorohexanone microbeads 32, and is compounded with a compounding machine to make a fire-extinguishing tape. The remaining proportions and preparation methods are the same as those in embodiment 1.

[0152] Example 9

[0153] This embodiment refers to the preparation method of Example 1 to prepare a self-flaming retardant and highly efficient fire extinguishing tape sheet.

[0154] The difference between this embodiment and embodiment 1 is that this embodiment adds an additional fire extinguishing layer 3 on the basis of embodiment 1. Specifically, in step S2.5, perfluorohexanone is selected as perfluorohexanone microbeads 32 with a particle size of 1000 μm. Since the particle size of perfluorohexanone microbeads 32 becomes larger, the corresponding parameters of S2.2, S2.3, S2.4, and S2.5 in the method of embodiment 1 must be changed.

[0155] Specifically: S2.2, first make the first fire extinguishing layer 3, and evenly apply the prepared flame retardant filling glue on the glue surface of the second flame retardant glue layer 23 of the flame retardant tape piece 2 prepared in step S1 through a machine scraper, and the thickness of the glue is 1900μm.

[0156] S2.3, the flame retardant tape piece 2 coated with flame retardant filling glue is baked in a 60°C oven for 20 minutes. At this time, the glue has evaporated and the thickness has been reduced to about 1200 μm.

[0157] S2.4. When the flame retardant filling glue is slightly dry and sticky, the perfluorohexanone microbeads 32 are evenly sprinkled on the moving material using a vibrating plate. The bottom material moving speed is 8M / min and the sprinkling frequency is 60.

[0158] S2.5, perfluorohexanone: Select perfluorohexanone microbeads 32 with a particle size of 1000 μm, and spread the perfluorohexanone microbeads 32 tightly and evenly on the filling glue. Use a roller to apply slight pressure on the perfluorohexanone microbeads 32 to let the perfluorohexanone microbeads 32 sink to the surface of the flame retardant tape sheet 2. Keep a gap of 1 mm between the roller and the surface adhesive layer of the bottom material.

[0159] After the flame retardant filling glue is dried in step S2.6, the first fire extinguishing layer 3 is completed. The steps S2.2 to S2.5 are continued to be used to make the second fire extinguishing layer 3 using perfluorohexanone microbeads 32 with a particle size of 500 μm. The remaining proportions and preparation methods are the same as those in Example 1.

[0160] Comparative Example 1

[0161] In this comparative example, a fire extinguishing tape sheet was prepared by referring to the preparation method of Example 1.

[0162] The difference between this comparative example and Example 1 is that: the perfluorohexanone microbeads 32 of this comparative example are selected with a particle size of 60 μm, and the thickness of the corresponding fire extinguishing layer 3 is also adjusted to 60 μm. To ensure the dense distribution of the perfluorohexanone microbeads 32, the bottom material moving speed of step S2.4 is also reduced to 3 M / min. The rest of the ratios and preparation methods are the same as those of Example 1.

[0163] Comparative Example 2

[0164] In this comparative example, a fire extinguishing tape sheet was prepared by referring to the preparation method of Example 1.

[0165] The difference between this comparative example and Example 1 is that the distribution of the perfluorohexanone microbeads 32 in this comparative example is compared with that in Example 1, the bottom material moving speed in step S2.4 is increased to 10 M / min, and the vibration frequency of the vibration plate remains unchanged at 75. The other proportions and preparation methods are completely consistent with Example 1.

[0166] Comparative Example 3

[0167] In this comparative example, a fire extinguishing tape sheet was prepared by referring to the preparation method of Example 1.

[0168] The difference between this comparative example and Example 1 is that in step S1, when preparing the bottom flame-retardant adhesive tape sheet 2, only the corresponding curing agent is added to the glue, and no other substances such as flame-retardant materials are added, and the adhesive tape sheet base material adopts ordinary non-flame-retardant materials. The rest of the proportions and preparation methods are the same as those of Example 1.

[0169] Comparative Example 4

[0170] In this comparative example, a fire extinguishing tape sheet was prepared by referring to the preparation method of Example 1.

[0171] The difference between this comparative example and Example 1 is that in step S3, when preparing the surface protective layer, only the corresponding curing agent is added to the glue, and no other substances such as flame retardant materials are added, and the thickness of the protective layer is still maintained at 15 μm. The remaining proportions and preparation methods are the same as those of Example 1.

[0172] Comparative Example 5

[0173] In this comparative example, a fire extinguishing tape sheet was prepared by referring to the preparation method of Example 1.

[0174] The difference between this comparative example and Example 1 is that when preparing the surface flame retardant protective layer 4 in step S3, the ratio of the glue remains unchanged, the coating thickness of the wet glue is 80 μm, and the thickness of the glue after curing and drying is 40 μm, that is, the thickness of the protective layer is 40 μm. The remaining ratios and preparation methods are the same as those in Example 1.

[0175] Performance Testing

[0176] Test objects: fire extinguishing tape pieces prepared in Examples 1 to 9 and Comparative Examples 1 to 5.

[0177] Test items and methods:

[0178] 1. The arrangement density of the perfluorohexanone microbeads 32 of the fire extinguishing sheet: Take an area of ​​30mmX30mm to count the number of perfluorohexanone microbeads 32 contained in the fire extinguishing sheet, and then calculate the area occupied by the perfluorohexanone microbeads 32 according to the particle size of the perfluorohexanone microbeads 32. The area occupied by the perfluorohexanone microbeads 32 is divided by the area of ​​the sheet of the same unit, which is the arrangement density of the perfluorohexanone microbeads 32 [arrangement density of perfluorohexanone microbeads 32 = number of perfluorohexanone microbeads 32 per unit area X (radius of perfluorohexanone microbeads 32 in millimeters) 2X3.14 / area of ​​the test sheet sample]. Take three samples from each test object for testing, and take the average of the results of the three samples.

[0179] 2. Damage rate during storage: Cut the prepared fire extinguishing sheet into 20 pieces of 200mmX200mm, weigh them, and then stack them neatly with the protective layer facing upwards, place them in an environment with a temperature of 50℃ for 48 hours, take them out and weigh them again, and calculate the damage rate during storage. Damage rate = (weight before storage - weight after storage) / weight before storage, recorded as a percentage.

[0180] 3. Flame retardant effect: Test according to the method specified in GB / T 2408-2008. Take 5 samples from each test object, and only when all 5 samples reach UL94V0 can they be considered qualified. If only one sample fails to reach UL94V0, it will be considered as unqualified for flame retardancy.

[0181] 4. Fire extinguishing performance: Adjust the flame torch with its own ignition device to the standard test flame of 50W, then extinguish the flame, stick the test object on a stainless steel plate with a thickness of about 2mm, with the fire extinguishing protective layer facing downward, move the flame nozzle of the flame torch vertically, 15mm away from the surface of the test object, and use a percentage stopwatch to calculate the time when the flame goes out after lighting the torch. After the flame goes out, light the torch again and use a percentage stopwatch to calculate the time for the second fire extinguishing. Take five points for each test object for testing, and take the average value after obtaining the values. The test objects are all finished products that have been stored at room temperature for one month.

[0182] The test results are shown in Table 1.

[0183] Table 1

[0184]

[0185] The test results of the comparative examples 1 to 9 and the comparative examples 1 to 5 show that all the examples 1 to 9 have the high-efficiency fire-extinguishing function of short first-time fire-extinguishing time and fast speed, and also have the fire-extinguishing function that is still effective for the second time. This is because, in the manufacturing process of the examples 1 to 9, the method of densely distributing the perfluorohexanone microbeads 32 is adopted, so that the density of the perfluorohexanone microbeads 32 is close to the saturation state, which makes the fire-extinguishing efficiency of the perfluorohexanone microbeads 32 very high. After the first fire-extinguishing of the perfluorohexanone microbeads 32, only a small part of the perfluorohexanone microbeads 32 is consumed to achieve the purpose of fire-extinguishing. When the fire source is encountered at the same point for the second time, there are still many intact perfluorohexanone microbeads 32 around the perfluorohexanone microbeads 32 consumed by the first fire-extinguishing. Although these perfluorohexanone microbeads 32 are not facing the fire source like the first fire-extinguishing, the wall-breaking diffuse spraying of the perfluorohexanone microbeads 32 around them will also bring the perfluorohexanone gas to the fire source, so as to achieve the purpose of fire-extinguishing, and the time will be slightly slower than the first time. However, in Comparative Examples 1 to 5, there are defects that the first fire extinguishing time is long or the second fire extinguishing function is not available.

[0186] By comparing the test results of Examples 1 to 9 with Comparative Example 1, it can be found that the fire extinguishing sheet of Comparative Example 1 has a high breakage rate during storage, reaching 7.8%. The particle size of the perfluorohexanone microbeads 32 of Comparative Example 1 is 60 μm, which is relatively small. Although it is also densely distributed, due to the thin bead wall and low trigger temperature, the perfluorohexanone microbeads 32 are also more damaged during storage. During the fire extinguishing process, almost all the perfluorohexanone microbeads 32 around the fire source have broken walls, but their particle size is relatively small, the perfluorohexanone content in the perfluorohexanone microbeads 32 is relatively much less, and the spraying distance is also limited, which leads to a long fire extinguishing time for the first time and no fire extinguishing function for the second time.

[0187] Comparing Comparative Example 2 with Examples 1 to 3 and Examples 5 to 8, it is found that the same 500 μm perfluorohexanone microbeads 32 are used. Comparative Example 2 adopts a diffused method, and its perfluorohexanone microbeads 32 arrangement rate is low, only 57.9%, while the perfluorohexanone microbeads 32 arrangement rate of the above 7 examples is about 85%. The dense distribution of perfluorohexanone microbeads 32 results in a fast fire extinguishing speed and a secondary fire extinguishing effect. However, the reduction in the number of perfluorohexanone microbeads 32 per unit area will result in low fire extinguishing efficiency and no secondary fire extinguishing function.

[0188] Comparing Comparative Examples 3 to 4 with Examples 1 to 9, it is found that neither the bottom tape of Comparative Example 3 nor the protective layer of Comparative Example 4 adopts flame retardant measures. During the flame retardant test, both Comparative Examples 3 and Comparative Examples 4 fail to meet the UL94V0 standard. During the test, the residue of Comparative Example 3 will drip with flames, which will increase the risk of secondary fire. Although Comparative Example 4 will not drip, there is a state of fire spread during the test. In the fire extinguishing test, during the first fire extinguishing process of Comparative Examples 3 to 4, although the fire extinguishing time will not be very long, due to the spread of flames, the perfluorohexanone microbeads 32 trigger the wall breaking over a large area, not only can the second fire extinguishing not be carried out, but also during the second ignition process, there is still a situation of fire spread. Compared with Examples 1 to 9, all components are made of reliable flame retardant materials, which greatly improves the flame retardant efficiency and reliability.

[0189] Comparing Comparative Example 5 with Examples 1 to 9, it is found that the protective layer of Comparative Example 5 reaches 40 μm, while the thickness of the protective layer in the Examples is controlled at 5 to 25 μm. In actual tests, Comparative Example 5 takes longer to burn through the protective film due to the excessive thickness of the film layer, thereby delaying the time for the perfluorohexanone microbeads 32 to be triggered, so its first fire extinguishing time is more than twice that of the Examples. In view of the fact that the outer protective film layer of Comparative Example 5 has been destroyed during the first fire extinguishing process, the second fire extinguishing time is similar to that of Examples 1 to 8.

[0190] The particle size of the perfluorohexanone microbeads 32 in the ingredients of Example 4 is selected to be 1000μm. Compared with Examples 1 to 3 and Examples 5 to 8, since the amount of perfluorohexanone contained in the large particle size is relatively large, although the trigger temperature is relatively high, it does not affect the efficient fire extinguishing after the wall is broken, so the first fire extinguishing time is nearly 0.5S faster than that of Examples 1 to 3 and Examples 5 to 8. However, due to the relatively large particle size, the arrangement rate of the perfluorohexanone microbeads 32 is relatively low. This is not caused by the insufficient arrangement, but the inevitable result of the gaps between the large particle sizes. The low arrangement rate of the perfluorohexanone microbeads 32 leads to a small number of perfluorohexanone microbeads 32 per unit area. Therefore, after the first fire extinguishing, the number of perfluorohexanone microbeads 32 left around it is limited, and the second fire extinguishing time is 1.5S slower than that of Example 1.

[0191] Compared with Example 1, the flame retardant protective layer 4 of Example 6 is thickened from 15μm to 25μm, and the material remains unchanged. As a result, the breakage rate during storage is reduced, but the fire extinguishing time is prolonged. The flame retardant protective layer 4 of Example 7 uses a viscous flame retardant adhesive. Since the adhesive layer is relatively soft, the breakage rate during storage is increased compared with Example 1, and the fire extinguishing performance is similar. The flame retardant protective layer 4 of Example 8 uses a formed 12μm flame retardant PET film. The PET film itself is relatively hard, so in actual application tests, compared with Example 1, the breakage rate during storage in Example 8 is small, but the fire extinguishing time is longer. This is because the thickness of the flame retardant PET adhesive increases, and it takes a certain amount of time to burn through.

[0192] The main difference between Example 9 and other examples is that a double-layer structure of the fire extinguishing layer 3 is adopted. The first layer of fire extinguishing layer 301 close to the attached product is relatively thick, and the particle size of the perfluorohexanone microbeads 32 in this layer is 1000μm. The second layer of fire extinguishing layer 302 close to the fire source is relatively thin, and the particle size of the perfluorohexanone microbeads 32 in this layer is 500μm. When the flame is applied for the first time, the first layer of fire extinguishing layer 301 begins to extinguish the fire. The perfluorohexanone microbeads 32 of the first layer in contact with the flame have broken the wall when the first flame is extinguished, exposing the second layer of fire extinguishing layer 302, and the perfluorohexanone microbeads 32 of the second fire extinguishing layer 3 have a larger particle size. When the flame is applied for the second time, the remaining 500μm perfluorohexanone microbeads 32 of the first layer of fire extinguishing layer 301 that have not broken the wall and the second layer of 1000μm perfluorohexanone microbeads 32 are triggered at the same time, achieving the effect of efficient fire extinguishing. Compared with Example 1, the second fire extinguishing time is shortened a lot, but its cost will also increase.

[0193] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. A method for manufacturing a self-flaming retardant and highly efficient fire extinguishing tape, characterized in that: The steps include: Step S1, making a flame retardant tape sheet: (1) mixing high-performance glue with nitrogen-phosphorus flame retardant powder and liquid octyl phosphate flame retardant, and stirring thoroughly to obtain high-viscosity flame retardant glue; (2) selecting a high-performance flame-retardant material as a tape sheet substrate, and attaching flame-retardant adhesive layers formed by curing a high-viscosity flame-retardant adhesive to both sides of the tape sheet substrate, and the two flame-retardant adhesive layers and the tape sheet substrate together constitute a flame-retardant tape sheet with double-sided adhesiveness; Step S2: Making a fire extinguishing layer: (3) 100 parts of high-performance glue and 35 to 50 parts of flame retardant powder are mixed and stirred at high speed to prepare flame retardant filling slurry, and perfluorohexanone microspheres with a particle size in the range of 350 μm to 1200 μm and a particle size difference of less than or equal to 10 μm are selected for use; (4) The perfluorohexanone microbeads and the flame retardant filling adhesive are attached together on one adhesive surface of the flame retardant tape sheet prepared in step S1; the perfluorohexanone microbeads are densely distributed in the flame retardant filling adhesive, and the bead walls of adjacent perfluorohexanone microbeads are closely attached, and the thickness of the flame retardant filling adhesive is consistent with the particle size of the perfluorohexanone microbeads; (5) The dense spreading method of perfluorohexanone microbeads is as follows: the perfluorohexanone microbeads are evenly sprinkled on the moving tape sheet using a vibration plate; the tape sheet moves at a speed of 5 to 8 M / min, and the vibration plate is 12 to 18 mm above the tape sheet. The perfluorohexanone microbeads are vibrated from the vibration plate to the surface of the tape sheet at a frequency of 60 to 75 Hz, and then the flatness of the perfluorohexanone microbeads and the flame retardant filling mortar is adjusted. (6) The tape sheet covered with perfluorohexanone microbeads is baked and dried at 50°C to 75°C for 1.5 to 2 hours until the flame retardant filling glue is completely solidified, thereby completing the preparation of a fire extinguishing layer; (7) If multiple fire extinguishing layers are to be set, repeat the operation of step S2; Step S3, flame retardant protective layer: (8) A flame retardant protective layer is provided on the surface of the fire extinguishing layer, wherein a flame retardant material is added to the flame retardant protective layer, and the thickness of the flame retardant protective layer is in the range of 5 to 25 μm.

2. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: In the process of making the flame-retardant tape sheet in step S1, a high-viscosity flame-retardant glue is first coated on the release material, and after drying and curing, a flame-retardant glue layer is formed, and then the flame-retardant glue layer is transferred to the tape sheet substrate through a roller.

3. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: In the preparation of the flame retardant tape sheet in step S1, the high-performance glue is made of one or more materials selected from pure acrylic acid, silicone, phenolic resin, furan resin, polyurethane, acrylic, and epoxy resin; The nitrogen-phosphorus flame retardant powder is made of melamine cyanurate or spirocyclic phosphorylbenzoate melamine ester; Liquid octyl phosphate flame retardants can be selected from trioctyl phosphate, phosphate esters or phosphonate ester flame retardants; The tape sheet base material is made of high-performance flame-retardant materials, including flame-retardant tissue paper, flame-retardant PET, flame-retardant PC, PVC, silicone tape, flame-retardant foam and aluminum foil.

4. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: In the preparation of the flame retardant tape sheet in step S1, the thickness of a single flame retardant adhesive layer ranges from 15 μm to 100 μm.

5. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet as claimed in claim 1, characterized in that: In the preparation of the flame retardant filling glue in step S2, the high-performance glue is selected from acrylic acid, silicone, phenolic resin, furan resin, polyurethane, acrylic, and epoxy resin; The flame retardant powder is selected from one or more of aerogel powder, calcium carbonate powder, high molecular weight polymer resin, rubber filling powder, urea-formaldehyde resin powder, fine silicon powder and red phosphorus powder.

6. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: In the process of preparing the fire extinguishing layer in step S2, the flame retardant filling adhesive is first evenly coated on one adhesive surface of the flame retardant tape sheet prepared in step S1 by a machine scraper, and the thickness of the flame retardant filling adhesive is consistent with the particle size of the perfluorohexanone microbeads; then the flame retardant tape sheet coated with the flame retardant filling adhesive is baked at a low temperature, and when the flame retardant filling adhesive is slightly dry and sticky, the perfluorohexanone microbeads are tightly and evenly distributed on the flame retardant filling adhesive, and then a slight pressure is applied to the perfluorohexanone microbeads to allow the perfluorohexanone microbeads to sink to the surface of the flame retardant tape sheet, and then baked and dried again.

7. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: Replace the preparation method of the fire extinguishing sheet in claim 6, first evenly and densely distribute perfluorohexanone microbeads on one adhesive surface of the flame retardant tape sheet, then pour the flame retardant filling slurry into the gaps of the perfluorohexanone microbeads, scrape off the excess slurry with a scraper to make the surface smooth, and the pouring thickness is greater than or equal to the particle size of the perfluorohexanone microbeads.

8. The method for manufacturing a self-flaming retardant and highly efficient fire extinguishing tape sheet according to claim 1, characterized in that: When multiple fire extinguishing layers are required, the third fire extinguishing layer is close to the fire point, and the first fire extinguishing layer is close to the bottom flame retardant tape sheet. The particle size of perfluorohexanone microbeads gradually decreases from the bottom layer to the surface layer.

9. The method for manufacturing a self-flaming retardant high-efficiency fire extinguishing tape sheet according to claim 1, characterized in that: In step S3, the type of the flame retardant protective layer is a non-sticky flame retardant protective adhesive layer, a sticky flame retardant protective adhesive layer or a formed flame retardant film.

10. A self-flaming retardant and highly efficient fire extinguishing tape, characterized in that: The self-flame retardant and high-efficiency fire extinguishing tape piece is prepared by the manufacturing method of any one of claims 1 to 9, comprising a flame retardant tape piece, a fire extinguishing layer and a flame retardant protective layer arranged in sequence from the bottom layer to the surface layer.

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