67results about How to "Play a role in environmental protection" patented technology

A wind-solar hybrid street lamp intelligent controller with adaptive regulating capacity comprises a control center, a negative-feedback PWM controller with forward feed, a user mode input interface and a status indication interface. The control center decides charge and discharge control modes and control parameters through respectively testing voltage and circuit of a wind-driven generator after rectification and filtering, voltage and circuit of a solar panel, and voltage and circuit of an accumulator port. The negative-feedback PWM controller with forward feed controls voltage inversion and charging efficiency of charging circuits through PWM signals. The wind-solar hybrid street lamp intelligent controller optimizes complementary effect of wind energy and solar energy according to wind force and automatic adaptive regulation of solar power, which ensures practical charging effect.

The present invention provides a preparation method and applications of an anion beta-cyclodextrin magnetic microsphere. The preparation method comprises: adopting a co-precipitation method to synthesize a Fe3O4 nanometer material under a weakly alkaline condition, adopting KH560 to modify the Fe3O4 nanometer material, dispersing the modified Fe3O4 nanometer magnetic fluid into a gelatinized beta-cyclodextrin, adopting epichlorohydrin as a cross-linking agent, adopting Na3P3O9 as an anionization modifier, adopting Span80 and Tween20 as emulsifiers, adopting kerosene as an oil phase, and adopting a reversed phase emulsion polymerization method to prepare the anion beta-cyclodextrin magnetic microsphere with characteristics of excellent heavy metal contaminant absorption performance, capability of being recovered, and recycling. The anion beta-cyclodextrin magnetic microsphere is mainly used in the fields of environment monitoring, sewage treatments and the like, wherein the pollution problem of heavy metal ions in sewage and other pollution sources can be well solved, effects of emission reduction and environmental protection can be provided, and survival environment conditions of people can be improved.

The invention discloses a 20000-container-class environment-friendly container ship and an intelligent management method thereof. The ship uses a wide-shallow design, uses a double-island layout structure in which a cabin and a living area are separated, uses cargo holds having large openings, is equipped with a binding system with an external binding function, and is equipped with an energy-efficient power system. In addition, the ship uses an intelligent one-person forebridge and intelligent navigation system, and uses a series of environmental protection measures. The ship is novel in structural design, can greatly increase the container load to a great extent, can hold containers of various specifications, has a high environment-friendly level and high intellectualized degree, can realize remote real-time monitoring and management, and is a large-scale environment-friendly container ship using intelligent management.

The invention discloses a V-method mold for casting an electronic appliance mold casting blank, and relates to the technical field of aluminum alloy casting. The V-method mold comprises a V-method mold body, wherein the mold body consists of independent combined mold blocks; each combined mold block is subjected to three-dimensional forming and design according to mold drawing requirements; the combined mold blocks are adhered to both sides so as to form the mold body; a plurality of vent holes for vacuuming are formed in the combined mold blocks. The mold casting blank of an inner container of a refrigerator is produced by using a V-method casting process, not only is the energy saved, is the consumption reduced, and is the working intensity alleviated, but also the factory environment is improved, and the V-method is an economic, environment-friendly and green project.

The invention belongs to the technology field of the metal product package, in particular to an anti-rust package method of the metal product. The invention solves the problems of poor anti-rust effect or high package cost existing in the anti-rust package of the current metal product. The procedure of the anti-rust package method of the metal product is as follows: an outer package is arranged with gas phase anti-rust bags inside, corrugated boards are rolled out; corrugated paper is added in to separate; gas phase anti-rust films are added; the metal product is filled; the gas phase anti-rust films are covered; the corrugated boards and dryers are added; gas phase anti-rust bags are arranged; the outer package is closed and is externally covered with PE rainproof films and PET is bound. The invention has the beneficial effects of oil-saving, environmental protection, anti rust, firm structure, simple technic, long anti-rust period and high reliability.

The invention discloses a lock polisher, which comprises a bed (1), a first dropping groove (2), a first linear driving mechanism (3), a second linear driving mechanism (4), a third linear driving mechanism (5), a grinding mechanism (6), a first discharge groove (7) and a control system. The grinding mechanism (6) is arranged on the bed (1), the first linear driving mechanism (3) is provided with a first material taking device (3.1) positioned below an opening of the lower end of the first dropping groove (2), the third linear driving mechanism (5) is provided with a first clamping positioning mechanism (5.1), the second linear driving mechanism (4) is provided with a push rod, and the first discharge groove (7) is arranged on the bed. By the aid of the polisher, a lock is polished faster, labor intensity of workers is reduced, simultaneously, parallelism of two end surfaces of the lock to be machined is good due to automatic polishing, dimension of the lock is controlled well, and patterns of the polished end surfaces are clear.

A provided preparation method for 4-chlorophenylhydrazine hydrochloride comprises the following steps: 1) under an acidic condition, at 5-10 DEG C, dropwise adding a sodium nitrite aqueous solution with a concentration of 20% into 4-chloroaniline to perform a diazo reaction and to generate a diazo salt; 2) under a room temperature condition, dropwise adding an ammonium sulfite aqueous solution into a solution of the diazo salt obtained in the step 1, heating to 50-60 DEG C and keeping the temperature for 3-4 h; and 3) at 50-70 DEG C, dropwise adding a hydrochloric acid solution with a concentration of 20% into the solution obtained in the step 2, keeping the temperature for 1-2 h, reducing the temperature, filtering, washing, discharging the material, and drying to obtain a finished product. The beneficial effects comprise that by using ammonium sulfite aqueous solution as a reducing agent in the reduction reaction, the problems are solved that sodium sulfite solid is easy to cake during material charging in a conventional technology and material charging is not easy to operate; ammonium chloride and ammonium hydrogen sulfate which are generated in the acidification reaction have high solubility in water, and crystallization precipitation is late, thereby facilitating performing of the acidification reaction in the solution and reducing side reactions; and the product crystallizes loosely, is good in fluidity, easy for material discharging and washing, and product quality and yield are both better than conventional production levels.

The invention provides an underground pipe embedding construction method. The method comprises the steps of 1, pipeline trench digging; 2, cushion construction; 3, pipeline installation and fixing; 4,pipe embedding concrete formwork construction; 5, pipe embedding concrete construction; 6, treatment of pipe embedding concrete construction joints; 7, trench backfill. The construction method solvesthe technical problems of the instability of a pipe and water seepage and leakage in pipe joints, and moreover, the method has the advantages of environmental friendliness and safe and civilized construction.

The invention discloses a recycling device capable of decomposing and burning matters through vapor clash. The recycling device mainly comprises a first liquid feeding tank, a second liquid feeding tank, a first solid feeding tank, a second solid feeding tank, a hot water exchange tank, a high-pressure plunger pump, a drying-type steam generator, a high-pressure atomizing device, a matter steam disintegrating pipe coil, a spray explosion cooling reduction chamber, a constant temperature furnace, a circulating pump, a fuel feeding tank, a high-position expansion tank, a low-position oil storage tank, a steam header, a steam turbine and a generator. The recycling device has the following advantages: 1, the recycling device can be used for solving the detects of conventional boilers and breaking through steam temperature without needing pressure; and 2, the recycling device can be used for solving traditional process production and making use of steam for supporting heat energy, generating electricity, desalinating seawater, treating sewage and garbage, decomposing at high speed, concentrating, extracting, drying the matters and deeply processing products, steam is reheated in a 80 DEG C furnace body and is cracked into hydrogen and oxygen which are used for circular burning, the matters are burned through reheated steam, and the recycling device is multipurpose high-efficiency energy-saving emission reduction environmental protection equipment.

The invention relates to a closed type medical waste transfer cart which adopts the spraying, cleaning and disinfection mode and includes a wagon box, wheels, a cart handle and a spray system. The invention is characterized in that doors which can be opened or closed are arranged on the top of the wagon box and the underside at one side of the wagon box; a drain with a valve is arranged under the wagon box; the spray system of the transfer cart includes a group of inlet pipes and injection heads, the spray-head is a spherical spray-head with a plurality of osculums that are evenly distributed on the surface. The medical waste transfer cart provided by the invention adopts the internal spray cleaning device under the totally enclosed condition; the spraying disinfection can be made inside the cart when external power equipment is connected. The cart can achieve the hygienic inspection standard after the cleaning and disinfection, which effectively prevents the residual and generation of the microorganisms, prevents the medical waste transfer cart from becoming the flowing pollutant source and causing pollution to the hospital environment. At the same time, the invention prevents the polluted water or disinfecting fluid during the clearing and disinfection process of the carts from polluting or hurting the environment and the staff and enhances the occupational health protection to the staff.

The invention provides a regeneration device and a regeneration method for adsorbent. The regeneration device comprises a regeneration gas buffer tank, a compressor, a first heater, a second heater, a primary cooler, a chiller, an adsorbent storage device, a waste gas cooler and a pressure balance tank, wherein regeneration gas is pressurized by the compressor and fed into the first heater; a heat source of the first heater comes from the reacted regeneration gas flowing out of the adsorbent storage device; the regeneration gas is subjected to primary heating, is fed into the second heater for further heating and is fed into the adsorbent storage device for a regeneration reaction; the reacted regeneration gas is subjected to heat exchange and cooling through the first heater, is successively fed into the primary cooler and the chiller for cooling and is returned into the regeneration gas buffer tank for recycling; and the regeneration gas failing to meet the requirements flows from the inside of the adsorbent storage device into the waste gas cooler for cooling, then enters the pressure balance tank, and is discharged into low-pressure gas of the whole plant to serve as fuel. The regeneration device has the characteristics of energy saving, high efficiency, environment friendliness and emission reduction.

The invention discloses a segmental-control secondary heat exchange condensation type gas heating water heater. The segmental-control secondary heat exchange condensation type gas heating water heater comprises a machine shell, a circulating water pump, a condensation heat exchanger, a draught fan, a combustion chamber, a heat exchanger, a segmental gas proportional valve, a control circuit board and a smoke discharge pipe; the circulating water pump and the control circuit board are fixedly mounted on a lower base plate of the machine shell through bolts, the output end of the circulating water pump is connected with the input end of the condensation heat exchanger through a water pipe, the draught fan is arranged on one side of the condensation heat exchanger, the output end of the condensation heat exchanger is connected to one side of the combustion chamber through a water pipe, the smoke discharge pipe is arranged on the top of the machine shell, a combustor is arranged at the bottom of the combustion chamber so as to increase the combustion area, the temperature is controlled through a water cooling pipe on the combustor, the temperature of the combustor cannot be too high, and therefore emissions of nitrogen oxides are reduced, heat efficiency is improved, the energy-saving environment-friendly effects are achieved, the practicability is high, and the water heater is easy to use and popularize.

The invention discloses a manufacturing method for a disposable sanitary base material and a production line for the manufacturing method. In the manufacturing method, a surface layer is formed on a net strip through net forming by first net-forming equipment; a first wrapping layer is formed on the surface layer through a net formed by second net-forming equipment; paving equipment is used for paving a water-absorbing material on the first wrapping layer to form an absorbing layer; a second wrapping layer is formed on the absorbing layer through a net formed by third net-forming equipment; and curing equipment is used for curing all the stacked layers to form the disposable sanitary base material. For the manufacturing method, on one production line, the surface layer, the wrapping layers and the absorbing layer are subjected to on-line production, and are stacked and cured together, so that the disposable sanitary base material is formed, the production steps and the production links for upstream suppliers are greatly reduced, for example, production links such as winding, unwinding, slitting and packaging for the surface layer and the wrapping layers are reduced, the rejection rate is reduced, the using amount of glue is reduced, the transportation amount is reduced, so that the cost is greatly reduced, and the function of low carbon and environmental production is achieved; and with the reduction of the using amount of glue, the product is more friendly and safer to the human bodies.

The invention belongs to the technical field of powdery material packing and conveying and discloses an environment-friendly cement packing machine. The environment-friendly cement packing machine comprises a suspension beam, a power system is arranged above the suspension beam, and an upper cover device, an upper rotation body, a filling system, a bagging mechanism, an open-close plate breaking mechanism, a lower rotation body and a microcomputer weighing scale are arranged below the suspension beam in sequence; the open-close plate breaking mechanism comprises a power supply, an electromagnet connected with the power supply and a plate breaking electromagnet capable of controlling the power supply to be connected and disconnected and used for controlling a pressure bag rubber wheel to move; the lower rotation body comprises a connection cylinder fixed to a connection disc, a conical disc fixed to the lower portion of the connection cylinder and a lower supporting column fixed betweenthe conical disc and a storage bin; the microcomputer weighing scale is fixed to the bottom of a bagging rack. The environment-friendly cement packing machine can achieve automatic filling, weighingand bag removal on cement, the cement can be subjected to flow guide through a ventilation system and is prevented from blocking an ash outlet of an ash outlet hopper, the filling efficiency is improved accordingly, energy consumption is reduced, and the functions of saving energy and protecting the environment are achieved.

The invention discloses a prefabricated filling wall system with a hollow thermal insulation structure and a construction method thereof. The prefabricated filling wall comprises a hollow cavity box structure and a concrete shell layer, wherein the concrete shell layer is poured on the outer side surface of the hollow cavity box structure. The hollow cavity box structure comprises cushion blocks,a steel bar mesh frame, a hollow box body and partition boards, wherein the hollow box body is formed by surrounding of box wall plates; and the partition boards are arranged in a hollow box body in parallel and at intervals. At least four cushion blocks are arranged on the front and rear box wall plates of the hollow box body. The steel bar mesh frame is formed by tie tying of a transverse steelbar and a vertical steel bar, and is laid on the hollow box body. Holes are arranged on the cushion blocks, wherein the transverse steel bar can penetrate through the hoes. A groove is formed by the left and right side box wall plates of the hollow box body and the front and rear side box wall plates of the hollow box body. The prefabricated filling wall has simple structure, convenient construction, good thermal insulation and sound insulation performance, and little influence of human factors on the construction. Flexible connection is used for effectively suppressing cracks in the filling wall.

The invention belongs to the technical field of fuel additives and particularly relates to functional auxiliaries for car fuel. The functional auxiliaries are prepared by, by weight, 30-50 parts of combustion improver, 10-20 parts of octane value accelerator, 10-16 parts of antismoke agent, 10-20 parts of dispersing agent, 5-12 parts of antioxidant and 3-9 parts of friction modifier. The functional auxiliaries have the advantages that the functional auxiliaries are scientific and reasonable in raw material proportion, have effects of improving combustion, increasing the octane value, cleaning, resisting corrosion, resisting oxidation and reducing the emission of harmful substances, and can effectively remove the accumulated carbon of a nozzle, guarantee good atomizing performance, keep engine performance and emission level, allow gasoline to be combusted completely and achieve energy conservation and environment protection.

The invention provides a boiler flue gas energy-saving white plume elimination device. The device comprises a boiler, and an air preheater, a dust collector, an induced draft fan, a desulfurization absorber tower and a chimney sequentially connected to the boiler through a flue. An air inlet and a blower of the boiler is connected to the air preheater through a air blow duct, a blower heater is provided at an inlet or an outlet of the blower, a heat medium water inlet and a heat medium water outlet is provided at the blower heater, the heat medium water inlet and the heat medium water outlet are sequentially connected to the flue gas residual heat exchanger and the heat medium water cooling device through a heat medium water pipe, and a heat medium water power driving device is provided atthe heat medium water pipe. The boiler flue gas energy-saving white plume elimination device provided by the the invention can not only fully recover the waste heat of the flue gas, but also has theobvious heat pump function, and can improve the grade and utilization efficiency of the recovered heat energy.

The invention relates to the technical field of water paint, and particularly relates to super waterproof water-borne wood paint and a preparation method thereof. The super waterproof water-borne wood paint comprises the following components by weight: 10 to 40 percent of fatty group polyurethane dispersoid,0.1 to 0.6 percent of coalescing agent, 40 to 80 percent of extender pigment, 1.5 to 3.5 percent of substrate wetting agent, 0.5 to 1.2 percent of antifoaming agent, 4 to 7 percent of dispersing agent, 0 to 1 percent of water and 0 to 1 percent of thickening agent. Through the adoption of the method that the fatty group polyurethane dispersoid is matched with related hydrophobic extender pigment, not only the good waterproof property of the products is ensured, but also the coating of the products is convenient in construction; and particularly the paint film adherence is good after coating, so as to achieve the real water-borne modification of the paint film, and to play functions of environmental protection, decoration and protection.

The invention discloses a wood-plastic wall material filled with light materials. The wood-plastic wall material structurally comprises a wall, a decorative panel and a wood-plastic layer. The wood-plastic wall material filled with the light materials has the advantages of solving the problems that stable supporting and shock absorbing cannot be conducted, and as a result the anti-shock performance of the wall is poor. By arranging a shock-absorbing supporting layer, firstly, through a wood-plastic plate, the effects of worm prevention, protection against termites, high fire prevention and others of the wall are improved; through a glass-fiber net, the capacities of thermal insulation, water prevention and cracking resistance of the wall can be enhanced, a rubber-plastic-cotton layer can enhance the properties of shock absorbing and rubbing resistance, an aluminum foil damp-proof layer can effectively realize the effects of shock absorption, dust prevention, toxin elimination and environmental protection, an acoustic board can have the effects of sound absorption, environmental protection, flame retardancy, heat insulation, thermal insulation, damp prevention and mildewing prevention, and light steel joists can enhance the supporting strength and shock absorption of the wood-plastic layer, and therefore the wood-plastic wall material has the advantages that stable supporting and shock absorbing can be conducted, and the anti-shock performance of the wall can be enhanced.

The invention relates to the technical field of cleaning devices and provides a central air conditioner filtering system, which comprises a circulating water pipeline and an electric control box for controlling the circulating water pipeline to operate according to a set order; at least one group of filtering devices in parallel connection and a water drain pipeline controlled by a fourth electrically operated valve are arranged between a water inlet pipe and a water return pipe; each group of the filtering devices comprises a first electrically operated valve arranged at a water inlet end of a filter and a second electrically operated valve arranged at a water outlet end of the filter; a pressure gauge and a pressure senor are arranged on the filter; a water flow sensor is arranged between the filter and the second electrically operated valve; a water drain pipe is arranged between the filter and the first electrically operated valve; a third electrically operated valve is arranged on the water drain pipe; a filter screen is arranged in the filter. According to the central air conditioner filtering system and the filtering method, through repeated circular filtering and back washing, the operation cost of central air conditioner is reduced, the effects of energy conservation and environmental protection are realized, and economic benefits and social benefits are realized.

The invention relates to a vertical double-stage permanent magnet air suspension ORC afterheat generator. The generator consists of upper and lower volutes of an expander, upper and lower impellers, a generator stator system, a generator rotor system, an upper air suspension bearing part and a lower permanent magnet air suspension bearing part; the upper and lower volutes of the expander are positioned at the upper and lower ends of the generator, and are respectively fixed on the upper air suspension bearing part and the lower permanent magnet air suspension bearing part; the upper air suspension bearing part and the lower permanent magnet air suspension bearing part are respectively mounted at the upper and lower ends of a base of a generator shell; the upper and lower impellers are respectively fixed at the upper and lower ends of a generator rotating shaft of the generator rotor system; the generator rotor system is positioned at the middle part of the generator shell, and is supported by the upper air suspension bearing part and the lower permanent magnet air suspension bearing part; the generator stator system is positioned on the outer side of the generator rotor system; and an air gap is formed between the generator stator system and the generator rotor system. The generator fully uses afterheat resources, and achieves broad market prospects.

The invention discloses a cooling device for production of plastic medical bottles. The cooling device comprises a first conveying belt and a second conveying belt which are connected through a rotating machine. An air cooler device is arranged on the left side of the second conveying belt. A water mist cooling device is arranged above the first conveying belt. A water receiving device is arranged below the first conveying belt and the second conveying belt. The water mist cooling device and the water receiving device are connected through a water pipe. A water pump device is arranged on the water pipe. A control console which is in control connection with all devices is arranged on the left side of the air cooler device. The air cooler device comprises an outlet which is flush with the surface of the second conveying belt. The water mist cooling device comprises spray nozzles. The cooling device for production of the plastic medical bottles is reasonable in design, scientific in structure, high in cooling efficiency and capable of effectively reducing the rejection rate of the bottles.

The invention relates to the field of fertilizers, and in particular, relates to a novel organic fertilizer and a preparation method thereof. The novel organic fertilizer comprises the raw materials: 10-20% of mushroom dregs, 5-15% of sawdust, 20-30% of bean dregs, 16-25% of plant ash and 25-35% of sheep manure. The preparation method comprises the steps: weighing and mixing the mushroom dregs, the sawdust, the bean dregs, the plant ash and the sheep manure according to the weight ratio, and feeding the mixture into a fermentation tank; and adding a leavening agent, fermenting for three times, feeding into an aging area for aging, and finally crushing and sieving to obtain the novel organic fertilizer. The raw materials are all from waste residues, waste materials and excrement, the cost is low, the effects of environmental protection and resource recycling are achieved, the organic fertilizer with the good effect is produced, resource waste is reduced, and high environmental protection significance and economic significance are achieved. The raw materials are fermented by adopting a three-time fermentation process, thorough decomposition is ensured, and the inactivation rate of roundworm eggs, escherichia coli, grass seeds and infectious microbes is 100%.

The invention relates to a broken tea refined processing technique. Equipment used in the broken tea refined processing technique comprises feeding grading vibration grooves, a drying system, a disintegration machine, a suction pipe, a cooling tower, an automatic tapping device and a dust removal system. The broken tea refined processing technique is characterized in that tealeaves enter the disintegration machine to be disintegrated so as to remove tea heads and tea stalks after entering a heat radiation cylinder of the drying system to be dried and dust removed through the feeding grading vibration grooves, then the disintegrated tealeaves enter the cooling tower to be cooled through the suction pipe, and finally the cooled tealeaves enter a flat and round sieve to be graded and packaged. An automatic production line is provided for the tealeaves from impurity removal, drying, dust removal, disintegration, grading to packaging, so that the production efficiency is improved, the working environment is improved, and the grade of the tealeaves is improved.

The invention relates to the technical field of healthcare, in particular to a healthcare massager. An opening is formed in one end of a shell, a channel communicated with the opening is formed in theshell, a one-way valve is embedded in the end, away from the opening, of the shell, an exhaust valve is embedded in the upper portion of the shell, and an air cavity respectively communicated with the exhaust valve and the one-way valve is formed in the shell. The healthcare massager is ingenious in design and small and exquisite in structure; vacuum is generated through acting in the channel, the internal pressure of the channel is changed, and the inner wall of the channel better fits skin surface, so that the massage effect is improved, and recovery of a patient is promoted; the channel iscomposed of a silica gel layer and a TPE material, so that the touch feeling is better, and the use experience of a user is improved; and the shell is detachably fixed through bolts, dismounting andmounting are convenient, the interior is convenient to clean, and the environment-friendly and sanitary effects are achieved.

The invention provides an ore grinding mineral dressing process for a large molybdenum ore, and belongs to the technical field of molybdenum ore dressing. The ore grinding mineral dressing process forthe large molybdenum ore comprises the steps that raw ore is fed into a SABC closed circuit grinding and grading system; a ground product is fed into copper and molybdenum bulk flotation operation composed of operations of rapid flotation, roughing, scavenging and preconcentration, rapid flotation concentrate and preconcentrated concentrate are obtained, and the rapid flotation concentrate is directly fed into secondary concentration; the preconcentrated concentrate is fed into closed circuit fine grinding operation, a fine-ground product is fed into molybdenum and copper separating flotationoperation; and tailings after fine scavenging is densely fed into a copper flotation process composed of one time of roughing, four times of concentration and two times of scavenging to obtain a final copper concentrate. Compared with a traditional molybdenum flotation multi-stage process, the molybdenum concentration adopts a flotation column, the advantages of high beneficiation efficiency, energy saving, low running cost, convenient maintenance, simple operation, high degree of automation and the like are achieved, the beneficiation enrichment ratio is large, and the stable concentrate products can be obtained.

The invention discloses a method for preparing an aqueous, environmentally-friendly and waterproof wood door coating. The method comprises the following steps: uniformly stirring an aqueous polyurethane dispersion, epoxy phenolic resin, glycerol, dimethicone, polyoxy ethylene nonyl phenyl ether, methylene dithiocyanate, calcium stearate, polyethylene glycol and water to obtain a prefabricated material; and adding sepiolite powder, precipitated barium sulfate, fumed silica and microcrystalline paraffin to the prefabricated material, carrying out uniform stirring, adding sodium lauryl ether sulfate, hydroxyethyl methylcellulose and diethylene glycol dimethyl ether, and carrying out uniform stirring to obtain the aqueous, environmentally-friendly and waterproof wood door coating. The coatingobtained through the method for preparing the aqueous, environmentally-friendly and waterproof wood door coating has an excellent waterproof property, and has environmental protection, decoration andprotection effects, a film formed by the coating has further enhanced adhesion and excellent strong chemical corrosion resistance, and also has resistance to wet heat and temperature variation, and the coating makes exterior walls have no spot or shedding phenomenon even in an extremely severe environment.