118 results about "Polystyrene particle" patented technology

The present invention relates to the technical field of building thermal insulation materials, specifically to a production process for a flame-retardant polystyrene foam board, comprising the following components in parts by weight: 100 parts of polystyrene particles, 8-12 parts of hydroxy polydimethylsiloxane, 5-15 parts of a foaming agent, 0.5-2 parts of a cross-linking agent, 3-8 parts of flame-retardant particles, and 2-5 parts of a plasticizer. In the present invention, by further processing the polystyrene foam board by puncturing and soaking it three times, a firm adhesion layer is formed on the surface of the foam board, and a multi-layer cooperative structure is constructed inside. In terms of thermal insulation, a dense interface layer suppresses air convection, and a flame retardant and perfluorohexanone fill the pores, effectively reducing thermal conductivity and enhancing thermal insulation effects. In terms of flame retardancy, a silane coupling agent firmly locks perfluorohexanone, ensuring that sufficient flame-retardant gas is released during combustion. The heat-insulating carbon layer formed in conjunction with the flame retardant achieves a synergistic effect of gas-phase flame retardancy and condensed phase barrier, thereby greatly improving flame retardancy.

The application belongs to the technical field of thermal insulation materials, and particularly relates to a novel thermal insulation material, a preparation method thereof and a cold plate. The novel thermal insulation material comprises the following raw material components: polystyrene particles 70-80 parts; methyl octabromo ether 5-7 parts; ethanol 0.5-1 part; freon 2-5 parts; and modified graphite powder 14-16 parts. The novel thermal insulation material has simple components, and after being prepared through compounding, the thermal conductivity coefficient is significantly reduced, and the novel thermal insulation material also has high strength and pressure resistance, fire resistance and water resistance. When the novel thermal insulation material is used for manufacturing a cold plate, the thickness can be greatly reduced under the same thermal insulation requirement, the space for use is saved, the self-weight is also reduced, and the novel thermal insulation material has a wide application prospect.

The invention relates to a vacuum cleaner filter bag for ophthalmic lens sculpture and a method of making a vacuum cleaner filter bag. The vacuum cleaner filter bag includes a filter bag body forming a volume, and expandable polystyrene (EPS) particles disposed within the volume. The service life of the filter bag is prolonged.

The utility model relates to the technical field of conveying pipelines, and discloses a raw material conveying pipeline for polystyrene particle production, which comprises a pipe body, the front end of the pipe body is fixedly connected with a discharge pipe, the outside of the pipe body is provided with a cleaning mechanism, and the front end of the discharge pipe is provided with a butt joint mechanism; the cleaning mechanism comprises a first fixing plate, a second fixing plate is arranged outside the first fixing plate, dismounting and mounting assemblies are arranged in the first fixing plate and the second fixing plate, a motor is fixedly connected to the front end of the second fixing plate, a rotating disc is fixedly connected to the driving end of the motor, a clamping block is fixedly connected to the rear end of the rotating disc, and the clamping block is fixedly connected to the rear end of the rotating disc. And the exterior of the clamping block is slidably connected with a scraping plate. According to the utility model, the scraping plate scrapes on the inner wall of the pipe body by virtue of the rotating block, so that raw materials are prevented from being attached, a good anti-blocking effect is achieved, the fixed plate assembly is disassembled, the pipeline is conveniently and comprehensively maintained and cleaned, and the long-term stable operation of the pipeline is ensured.

The application relates to the field of polymer material processing, and particularly discloses a coating agent for expandable polystyrene particles, a preparation method and application thereof. The coating agent for expandable polystyrene particles is prepared from the following components in parts by weight: 20-30 parts of a film forming agent; 30-40 parts of an emulsifier; 30-35 parts of a lubricant; and 10-15 parts of an anti-permeation material. The emulsifier comprises decaglycerin decastearate and glycerin monostearate in a weight ratio of 1: (1-2). The anti-permeation material is prepared from a functional monomer and activated graphene. The functional monomer comprises 2-acrylamide-2-methylpropanesulfonic acid and / or sodium p-styrenesulfonate. The product can be used for apparent protection of expandable polystyrene particles, can effectively improve the problems of adhesion and caking of EPS particles in the foaming process, and greatly reduces the possibility of damage to the coating part in the process of friction between different EPS particles.

The invention belongs to the technical field of building thermal insulation materials, and particularly relates to an environment-friendly furniture wall material and a preparation method thereof. The wall material comprises a thermal insulation layer and a decorative coating arranged on the surface of the thermal insulation layer, wherein the thermal insulation layer comprises the following raw materials in parts by weight: 30-45 parts of cement, 20-30 parts of fly ash, 8-13 parts of polystyrene particles, 5-9 parts of high-entropy boride aerogel, 3-4 parts of alkali-resistant gridding cloth, 0.2-0.5 part of a surfactant, 0.3-0.5 part of a water reducing agent, 0.2-0.6 part of a water retaining agent and 25-40 parts of water. The high-entropy boride aerogel is added into the thermal insulation layer, and the alkali-resistant gridding cloth is used, so that the wall material has good mechanical property and thermal insulation property, and is good in water resistance and permeability resistance. Besides, solid wastes such as fly ash and ardealite are adopted to replace part of raw materials of the wall material, so that high-value utilization of the wastes can be promoted, environmental pollution is reduced, and the wall material is environmentally friendly.

The invention relates to the technical field of refining of high-purity boric acid, and particularly discloses a method for removing divalent metal ions in high-purity boric acid, which comprises the following steps: dissolving the high-purity boric acid in water, filtering, adsorbing by adsorbent resin, filtering to obtain a refined boric acid solution, cooling, crystallizing, evaporating, crystallizing, carrying out suction filtration, and crushing to obtain the refined boric acid. The preparation method of the adsorption resin comprises the following steps: (1) blending polystyrene master batches with acetyl chloride, dispersing, and adding Lewis acid for reaction to obtain acetylated polystyrene particles; and (2) dispersing acetylated polystyrene particles, mixing with p-aminobenzene arsenic acid to react, filtering, and washing with alcohol to obtain the adsorption resin. After the high-purity boric acid is treated by the adsorbent resin prepared by the invention, the purity of the high-purity boric acid can reach 99.99%, and the effect of removing divalent metal ions in the high-purity boric acid can be realized.

This invention discloses a high-performance vitrified microsphere composite polystyrene particle insulation board and its preparation method, comprising the following steps: premixing hydrophobic vitrified microspheres and expandable polystyrene particles coated with expanded graphite at a mass ratio of (2.5~4):1 to obtain composite lightweight aggregate. The insulation board prepared by this invention, with a dry density of only 184-193 kg / m³, exhibits a compressive strength as high as 0.275-0.302 MPa, significantly superior to traditional inorganic insulation boards (0.15-0.25 MPa) and organic insulation boards (0.10-0.15 MPa); its thermal conductivity is as low as 0.034-0.041 W / (m·K), and its insulation efficiency is more than 40% higher than that of traditional inorganic materials, while also possessing Class A fire safety performance; furthermore, the process is simple and controllable, with an industrial solid waste utilization rate of up to 70%, demonstrating significant economic benefits and environmental value, and possessing broad prospects for widespread application.

The application relates to a preparation method of an anti-shrinkage shock-absorbing gasket and the shock-absorbing gasket, and the preparation method comprises the following steps of S1: mixing and stirring 95-105 parts of polystyrene particles with 1-3 parts of polyvinyl alcohol particles or polycarbonate particles according to weight parts to form mixed particles; S2: heating the mixed particles until melting to form molten materials; S3: after the molten materials are cooled and formed at least once, sheet blank is formed, an insulating sheet is arranged between two pieces of the sheet blank, and the two pieces of the sheet blank are connected to each other to form a three-layer sheet, the three-layer sheet is extrusion formed to form a smooth sheet, and the smooth sheet is dried; S4: the dried smooth sheet is extrusion formed again to form a textured sheet; and S5: the textured sheet is cut to obtain the anti-shrinkage shock-absorbing gasket. The anti-shrinkage shock-absorbing gasket can improve the resilience of the gasket, thereby improving the utilization rate of the gasket, and the gasket has high anti-shrinkage.

The present invention relates to the field of modified diene-containing (co)polymers, in particular a modified styrene-butadiene copolymer, which can be used as flame retardants for expandable polystyrene polymer compositions; in particular, the invention relates to a modified diene-containing (co)polymer, a method for preparing it, and its use as a flame retardant for expandable polystyrene; the modified diene-containing (co)polymer claimed in the invention is characterized by high thermostability, namely a 5% weight loss temperature of at least 180°C, a molecular weight of at least 1500 g / mol, and a halogen content of at least 35% by weight; the tertiary and / or allyl halide content is on the scale of 0 to less than 1.5%, and it does not affect the polymerization process and the formation of polystyrene granules, and it allows obtaining polystyrene granules with a yellowness index of 2 to 6 units, comparable to the yellowness index of polystyrene granules containing HBCD (from 0 to 3 units).

The utility model discloses a heat insulation plate with a rubber powder polyphenyl granule protective layer, which relates to the technical field of heat insulation plates, is used for solving the technical problem that the adhesive force of the rubber powder polyphenyl granule protective layer of the existing heat insulation plate is not strong, and comprises a core body, a coating layer and a protective layer formed by rubber powder polyphenyl granules, the core body is wrapped by the wrapping layer, the wrapping layer comprises a metal wire mesh formed by metal wires, the metal wire mesh is arranged on the outer side of the wrapping layer, the protective layer is attached to the outer side of the metal wire mesh, and a glass wire mesh formed by cross combination of glass wires is arranged in the protective layer. The metal wire mesh is additionally arranged between the coating layer and the protective layer and wraps the outer side of the coating layer, the adhesive force of the protective layer is enhanced, the compactness and stability of the whole structure are enhanced, and the technical problem that the adhesive force of a rubber powder polyphenyl granule protective layer of an existing heat insulation plate is not high is solved.

The application relates to the technical field of new wall building materials, and discloses a building energy-saving thermal insulation wall composite material and a preparation method thereof. The preparation method of the building energy-saving thermal insulation wall composite material comprises the following steps: loading eutectic hydrated salt in modified diatomite to obtain a diatomite-based phase change material; modifying the diatomite-based phase change material through 3-(2,3-epoxypropoxy) propyl trimethoxysilane and a flame retardant to obtain a functionally modified diatomite-based phase change material; mixing microsilica powder, the functionally modified diatomite-based phase change material, calcium oxide, double-coated foamed polystyrene particles, a polycarboxylic acid-based high-performance water reducing agent and deionized water in proportion, performing mold pressing, standing, demolding and obtaining the building energy-saving thermal insulation wall composite material; the building energy-saving thermal insulation wall composite material has good heat insulation performance and simultaneously has flame retardant performance, and can be used in an outer wall thermal insulation material with high fireproof performance.

This invention relates to a high-flowability, high-toughness, and high-gloss ABS resin and its preparation method, belonging to the field of synthetic resin technology. The invention involves introducing small-particle-size polystyrene latex as a seed latex during the preparation of EBR latex, constructing an EBR latex with a polystyrene core and a polybutadiene shell. This is followed by the preparation of high-rubber ABS resin powder. SAN resin, additives, and antioxidants are then added and thoroughly mixed before extrusion using a twin-screw extruder at 200–220°C to obtain the aforementioned high-flowability, high-toughness, and high-gloss ABS resin. The increased volume of the polystyrene particles within the rubber particles improves the mechanical properties of the ABS resin. Furthermore, the small-particle-size polystyrene particles melt into molten styrene during ABS resin processing, significantly improving the flowability and deformation capacity of the polybutadiene rubber particles, thus enhancing the flowability and gloss of the ABS resin.

A premixing method of expandable polystyrene particles and sodium silicate solution, characterized in that a premixing device is provided above a drying stirrer and is connected with an expandable polystyrene particle bin and a sodium silicate solution bin respectively, when it is needed to premix expandable polystyrene particles and sodium silicate solution, expandable polystyrene particles are provided, and according to the volume ratio, 0.3-0.4 times of the volume of the expandable polystyrene particles of sodium silicate solution, while spraying industrial sodium silicate solution in the cylinder by starting the atomizing nozzle, the expandable polystyrene particles are carried by the pressurized gas and sprayed to the sprayed sodium silicate solution, and the premixing of the expandable polystyrene particles and the sodium silicate solution is completed in the cylinder of the premixing device. The method provided by the application can greatly reduce the input amount of sodium silicate solution.

The utility model discloses a kind of homogeneous body combination sandwich self-insulation blocks, it includes self-insulation block body, light concrete homogeneous structure layer, heat-insulating homogeneous structure layer and connecting piece;The heat-insulating homogeneous structure layer is made of heat-insulating core material, and is installed in the length direction of self-insulation block body by connecting piece, and heat-insulating homogeneous structure layer is equipped with four corner-cutting or through-hole.The light concrete homogeneous structure layer covers heat-insulating homogeneous structure layer except the exposed surface of two ends required to ensure the continuity of heat insulation and all other parts and connecting piece, and the light concrete homogeneous structure layer is made of cement polystyrene particle microporous concrete pouring.The utility model is inserted into connecting piece by cutting corner or punching treatment to four corners of heat-insulating core material, and the two ends of connecting piece are anchored and connected with the two sides of heat-insulating core material Light concrete, improve the restriction to core material thermal expansion, solve the problem that core material and product concrete are separated during the construction of traditional insulation block, so that self-insulation block has stable structure and heat-insulating fireproof performance.

The invention relates to a lightweight thermal-insulation grouting material for 3D printing concrete members. The lightweight thermal-insulation grouting material comprises polyphenyl particles, a cementing material accounting for 375.00-500.25 kg / m of the polyphenyl particles, redispersible latex powder accounting for 0.50-1.50% of the total weight of the cementing material, an additive accounting for 0.42-2.42% of the total weight of the cementing material, and water accounting for 48.00-52.00% of the total weight of the cementing material. The invention solves the problems of large cement consumption, heavy weight, obstructed carbon economic development and poor function integration of the existing grouting material, and has the advantages of improving the durability of the material, reducing the manufacturing cost and realizing the matching of the workability and the pumpability of the material.

This application relates to the field of high-purity boric acid refining technology, specifically disclosing a method for removing divalent metal ions from high-purity boric acid, comprising the following steps: high-purity boric acid is dissolved in water and filtered, adsorbed by an adsorption resin, filtered again to obtain a refined boric acid solution, and then subjected to cooling crystallization and evaporation crystallization, filtered, and pulverized to obtain refined boric acid. The preparation steps of the adsorption resin include the following: (I) polystyrene masterbatch is mixed with acetyl chloride, dispersed, and reacted with Lewis acid to obtain acetylated polystyrene particles; (II) the acetylated polystyrene particles are dispersed, mixed and reacted with p-aminophenylarsonic acid, filtered, and washed with alcohol to obtain the adsorption resin. After treatment with the adsorption resin prepared in this application, the purity of high-purity boric acid can reach 99.99%, and the effect of removing divalent metal ions from high-purity boric acid can be achieved.

The invention discloses a polystyrene plastic particle drying process. The polystyrene plastic particle drying process comprises the following steps that S1, preheating and preliminary dehumidification are conducted, specifically, polystyrene particles to be dried are conveyed into a first-stage drying device through conveying equipment; s2, efficient convection deep drying is conducted, specifically, the preheated particles immediately enter a second-stage drying device through a heat preservation pipeline; s3, cooling and homogenizing, wherein the particles subjected to deep drying enter a third-stage device; the first-stage infrared preheating efficiency is extremely high, the heat loss is small, most dehumidification work is rapidly completed, the load of the second-stage dehumidification dryer is greatly reduced, and the energy consumption and specification requirements of the second-stage dehumidification dryer are reduced. And the micro-negative pressure environment further improves the drying efficiency and shortens the time.

The present application relates to the technical field of thermal insulation homogeneous bricks, and particularly discloses a cement thermal insulation homogeneous brick, which comprises cement, shale mineral powder, modified vitrified microbeads, lime, polymer glue powder, perlite, reinforced fiber, EPS polystyrene particles, deionized water, calcium carbonate, calcium silicate, magnesium borate, straw powder, AR glass fiber, carboxymethyl cellulose, water reducing agent, foaming agent, foaming regulator, catalyst, crosslinking agent, foam stabilizer and glyoxal, and the components are respectively 300-400 parts of cement, 42-45 parts of shale mineral powder, 33-38 parts of modified vitrified microbeads, 15-25 parts of lime, 2-5 parts of polymer glue powder, 15-18 parts of perlite, 8-12 parts of reinforced fiber, 10-15 parts of EPS polystyrene particles, 200-300 parts of deionized water, 2-3 parts of calcium carbonate and 2-3 parts of calcium silicate in terms of weight ratio. The present application can effectively solve the problems of low structural strength, poor fire resistance and thermal insulation performance and failure to meet the use requirements of the existing cement thermal insulation homogeneous bricks.

The application relates to the technical field of building materials, and discloses a kind of flame-retardant polystyrene composite insulation board and preparation method thereof, flame-retardant polystyrene composite insulation board includes the following components by weight: cement 70~80 parts, polystyrene particles 25~35 parts, dispersible latex powder 2~3 parts, SiO2 aerogel 7~10 parts, silica fume 8~12 parts, water 40~50 parts, water reducing agent 0.5~1 part;Polystyrene particles include the following components by weight: polystyrene 100 parts, flame retardant 10~15 parts, antioxidant 0.2~0.4 parts;Flame retardant includes 3-phenylsulfonyl benzene sulfonic acid potassium, magnesium hydroxide, zinc borate.Through the above technical scheme, the problem of poor flame retardance and strength of the polystyrene composite insulation board in the prior art is solved.

The utility model provides an anti-cracking connecting structure for a polyphenyl granule cement sandwich composite wallboard, which comprises a reinforcing steel bar, one end of the reinforcing steel bar is arranged in a main body structure along the horizontal direction, the other end of the reinforcing steel bar is provided with a bending part, the bending part extends towards the vertical direction of the composite wallboard, and the composite wallboard is provided with a board surface groove; when the composite wallboard is connected with the main body structure, the reinforcing steel bars exposed out of the main body structure are located in the board face grooves and make contact with the side walls of the board face grooves, and the board face grooves are further filled with micro-expansive cement mortar. The integrity of the composite wallboard and a main body structure and the expansibility and the bonding strength of the micro-expansive agent cement mortar are improved through high strength, good toughness and good ductility of the steel bars, stress concentration caused by temperature change or load action is reduced, crack generation is inhibited from the source, crack generation and development are effectively controlled, and the service life of the composite wallboard is prolonged. The problems of water seepage, falling and the like caused by cracks are avoided, the service life of the composite wallboard is prolonged, the maintenance cost is reduced, and the safety of the composite wallboard is improved.

The invention discloses a high-precision anti-caking polystyrene particle pneumatic transmission control system and method, and belongs to the technical field of polystyrene particle transmission. The system comprises an air source module, a particle storage and supply module, an anti-caking processing module and a control and monitoring module combination; in the implementation process, external gas is purified and dried through the gas purification device and then sent to the gas storage tank through the air compressor, pure compressed gas in the gas storage tank serves as a conveying gas source, and the flow control valve is opened according to the set flow so that raw materials in the particle storage tank can enter the conveying pipeline to be conveyed along with airflow; the flow sensor, the pressure sensor and the temperature sensor detect pressure, temperature and flow parameters in a transmission pipeline in real time and feed back the parameters to the data acquisition card, the central processing unit compares preset data with data fed back by the data acquisition card, the difference value is adjusted, and transmission precision and stability are guaranteed. The problems that pneumatic conveying precision of polystyrene particles is low, and the polystyrene particles are caked are solved.

The invention discloses flame-retardant polystyrene particles and a preparation method thereof, and belongs to the technical field of high polymer materials. The flame-retardant polystyrene particle is prepared from the following raw materials in parts by weight: 80 to 100 parts of polystyrene, 8 to 14 parts of flame retardant, 4 to 8 parts of acrylonitrile-styrene-butadiene copolymer, 1 to 3 parts of styrene-silane-cyanophenylboronic acid copolymer, 8 to 12 parts of white carbon black, 0.4 to 2 parts of antioxidant and 0.4 to 0.8 part of lubricant. 4-aminobenzothiophene (at) PDA (at) MDH is used as a flame retardant, agglomeration of the flame retardant is inhibited through multi-layer modification, combination with a matrix is enhanced, and meanwhile multi-element synergistic flame retardance is achieved; in addition, the styrene-silane-cyanophenylboronic acid copolymer is added, so that the filler dispersion is assisted, the toughness of the material is improved, further synergistic flame retardance is realized, and finally, the optimization of the flame retardance, the mechanical property and the processing stability of the material is realized at a low addition amount.

The utility model relates to the technical field of polystyrene particle processing, and discloses a buffer box for polystyrene particle processing, which comprises a processing box, the inner wall of the processing box is in sliding connection with a screening plate, the inside of the screening plate is in sliding connection with a dislocation mechanism, the left side of the processing box is fixedly connected with a driving mechanism, and the left side of the processing box is fixedly connected with a discharging mechanism. Two discharging plates are fixedly connected to the inner wall of the processing box, an adjusting mechanism is fixedly connected to the top sides of the discharging plates, the dislocation mechanism comprises a dislocation plate, the outer portion of the dislocation plate is slidably connected to the inner wall of the screening plate, and a sliding plate is fixedly connected to the right side of the dislocation plate; the inner wall of the sliding plate is slidably connected with a sliding assembly. According to the screening device, the dislocation plate is driven to slide by pulling the sliding plate, so that the dislocation plate and the opening in the screening plate are staggered, adjustment on different screening requirements is achieved according to the dislocation angle of the sliding plate and the screening plate, and then the working efficiency is improved.

The present invention relates to a multilayer polymer coating for packaging expandable polystyrene (EPS) granules. The present invention also relates to a method for producing said multilayer polymer coating, as well as to a packaging material for EPS granules composed of said coating, and its use for packaging said granules.

This utility model discloses a composite autoclaved aerated concrete (AAC) panel structure and an energy-saving wall system comprising it. The composite AAC panel structure includes an AAC panel and a high-efficiency insulation layer. The high-efficiency insulation layer is a composite insulation mortar containing expandable polystyrene particles or a foamed polyurethane material. The AAC panel is used as a base mold for pouring the high-efficiency insulation layer onto the AAC panel, followed by curing to connect the high-efficiency insulation layer to one or both sides of the AAC panel. This ensures that the high-efficiency insulation layer and the AAC panel are cast and bonded together, effectively preventing detachment and greatly improving the safety and stability of the composite AAC panel structure. The high-efficiency insulation layer, being a composite insulation mortar containing expandable polystyrene particles or a foamed polyurethane material, is flame-retardant and fireproof while also providing excellent insulation performance, ensuring both the insulation and fire resistance of the composite AAC panel structure.

The utility model relates to the technical field of polystyrene production, in particular to an expanded polystyrene low-energy-consumption production device which comprises a reaction cavity and two supports, the two supports are both fixedly connected to the outer surface of the reaction cavity, a vibration discharging component is installed on the support located on the upper side, and a discharging component is installed on the lower side of the reaction cavity. The vibration discharging component comprises a material chamber, a rotating shaft, a movable plate and a fixed plate, the material chamber is fixedly connected to the support located on the upper side, the rotating shaft is rotationally connected to one end of the material chamber, the movable plate is slidably connected to the outer surface of the rotating shaft, and the fixed plate is fixedly connected to the rotating shaft. The impact rod in the cylinder moves downwards under the extrusion action of the arc-shaped block on the partition plate, and when the impact rod penetrates through the arc-shaped block, the impact rod impacts the partition plate under the reset action of the straight spring, so that the material chamber vibrates, and the material chamber is separated from the partition plate. Polystyrene particles are prevented from blocking the discharging opening, and the production efficiency is improved.

The application provides a light facing material and a preparation method thereof, and the light facing material is prepared by stirring, demolding and curing of water, hollow sphere colloidal silica, thickening agent, glue powder, Portland cement, heavy calcium, vitrified microbead, water reducing agent, lithium carbonate, anti-cracking fiber and polystyrene particles in certain weight parts. The compressive strength of the light facing material prepared by the application is greater than 30 MPa, and the density is less than 600 kg / m 3 after curing for 48 hours after pouring into a mold. The light facing material can be used to produce concrete plate materials with light weight, high strength, heat preservation and sound insulation through a mold with corresponding size, and is widely applied to surface decoration of inner wall and ground.

The invention discloses a fire-extinguishing expansion adhesive tape for a secondary battery and a preparation method of the fire-extinguishing expansion adhesive tape, and relates to the technical field of secondary batteries. The fire-extinguishing expansion adhesive tape for the secondary battery comprises an expansion layer and a bonding layer which are arranged in a stacked mode, the expansion layer is prepared from, by mass, 30-50 parts of polyurethane particles, 30-50 parts of polystyrene particles, 10-30 parts of perfluorohexanone fire-extinguishing microspheres and 1-10 parts of a first isocyanate curing agent, and the bonding layer is prepared from polyacrylate pressure-sensitive adhesive. And the particle size DV50 of the perfluorohexanone fire extinguishing microspheres is 50-300 [mu] m. The fire-extinguishing expansion adhesive tape disclosed by the invention has a relatively good expansion effect, a fire-extinguishing function, short fire-extinguishing response time and excellent electrolyte corrosion resistance, and can meet the requirements of different gaps of 0.2-2mm inside and outside the secondary battery.

The application discloses a hidden modular wallboard suitable for variable space, comprising: a plurality of groups of L-shaped angle steels embedded in a concrete top plate, each group of L-shaped angle steels being provided with spring lock points; upper and lower rails respectively detachably connected with the spring lock points through screw rods; an aluminum alloy frame batten comprising vertical battens, upper cross beams, lower cross beams and middle cross beams, wherein the upper cross beams and the lower cross beams are connected with the vertical battens through corner codes, and the middle cross beams are fixed with the vertical battens through screw eyes; a modular polystyrene particle board embedded in the aluminum alloy frame batten; and a magnetic wallboard magnetically connected with the aluminum alloy frame batten through customized magnetic strips arranged on both sides of a groove of the cross beam. Through detachable buckle connection of the upper and lower rails with the wallboard and a magnetic installation mode of a finishing layer, lossless, quick disassembly, replacement and change of the wallboard main body and the finishing layer are realized, and the flexibility of space change is greatly improved and the reconstruction cost is reduced.