103results about How to "Good formaldehyde removal effect" patented technology

The invention discloses an efficient low-toxicity formaldehyde scavenger containing the following raw material components by weight: 0.5%-5% of hydrazide, 0.1%-5% of a water-soluble ester, 0.5%-10% of a moisture absorbent, 0.1%-0.5% and of a buffer, 0.05%-1% of a surface active agent, 0.02%-0.5% of a preservative and 80%-98% of water. The free hydrazine content in the efficient low-toxicity formaldehyde scavenger product is controlled in the range as low as possible by the manner of fine selection of the hydrazide raw material, control of free hydrazine content, adding of the water-soluble ester, adding of the buffer, and the like, and the efficient low-toxicity formaldehyde scavenger product has better security. The efficient low-toxicity formaldehyde scavenger product is good in formaldehyde removal effect, safe to people and objects, and simple in production process, and can be used for governance of the problem of formaldehyde exceeding the standard in new decorated residence or furniture.

The invention relates to a self-clean self-purification cement-based facing material and a production method thereof. The self-clean self-purification cement-based facing material comprises the following components in parts by weight: 20-30 parts of white silicate cements, 5-10 parts of mineral admixtures, 0-20 parts of quartz sands of 20-30 meshes, 20-30 parts of quartz sands of 40-70 meshes, 20-30 parts of quartz sands of 70-100 meshes, 1-4 parts of kieselguhr, 2-4 parts of zeolite, 0.2-0.6 part of nanometer titanium dioxide, 0.5-2.0 parts of EVA redispersible latex powder, 0.2-0.8 part of organic silicon water repellent, 0-1 part of ferric oxide inorganic pigment and 0.1-0.7 part of other chemical additive. The self-clean self-purification cement-based facing material, provided by the invention, has the advantages of good self-clean property, good self-purification property, good air purification capacity, good adhesive property, good construction property, good endurance quality, higher compression strength and the like, when the self-clean self-purification cement-based facing material is used for decoration of facings of an inner wall space and an outer wall space of a building, the air purification effect and the decoration effect are good, and the self-clean self-purification cement-based facing material can be applied for decoration engineering of all kinds of facings of walls of buildings.

The present invention provides a formaldehyde removing reagent for treating a formaldehyde-containing fabric, and a use method thereof. The reagent comprises the following raw materials, by weight, 20-50% of a reaction agent, 0.5-5% of a catalyst, 1-10% of a volatilization promoting agent, 10-40% of a surfactant, and the balance of water, wherein the reaction agent is one or a plurality of matters selected from easily-water-soluble alkaline materials and organic matters widely existing in polyphenol plants, the catalyst comprises at least one selected from metal powder or a nano-scale metal oxide, the volatilization promoting agent comprises at least one selected from active carbon, diatomite and silicon carbide, and the surfactant comprises one or a plurality of matters selected from an easily-biodegradable nonionic surfactant, a commonly used anionic surfactant and an alcohol. The formaldehyde removing reagent of the present invention has characteristics of excellent formaldehyde removing performance, convenience, rapidness, high efficiency and low consumption, can remove most of formaldehyde in a variety of fabrics, and is a good fabric formaldehyde removing reagent.

The invention relates to a formaldehyde scavenger, which is used for scavenging a formaldehyde composition from an artificial panel and products thereof. The invention discloses a high-efficiency strong penetration type formaldehyde scavenger. The formaldehyde scavenger comprises a hydrazide compound, urea, an inorganic amine compound, a penetrant, a pH adjusting agent, water and the like. The product is non-toxic, smellless, safe, environment-friendly and strong in penetrability; the scavenger is coated on the exposed surfaces of various panels and furniture, can rapidly penetrate and scavenge free formaldehyde from the exposed surfaces, and has a lasting effect; and the scavenger can also be sprayed in the air so as to scavenge the free formaldehyde from the air. The scavenger has the advantages of simple production process and equipment, no three-waste pollution and low production cost.

The invention discloses a preparation method of a sandwich type anti-microbial composite nanometer filtering material for scavenging formaldehyde with high efficiency and low resistance, and the method comprises the following steps: a nanoparticle bonding solution is prepared; nanoparticles are coated; spinning liquid is prepared; a nanometer fibrous layer is formed by electrostatic spinning; a covering layer is attached on the nanometer fibrous layer, in order to form a three-dimensional multidimensional sandwich structure which is composed of a supporting layer containing nanoparticles, thenanometer fibrous layer and the covering layer. The method has simple design technology, and the material has high filtering efficiency and low air resistance for PM 2.5; the material has small pressure drop and can dedust, so that the problems of low efficiency and high resistance of traditional air cleaning materials are overcome; the product is advantageous in that the material can precipitateharmful PM2.5, formaldehyde and a plurality of substances which are harmful for human bodies in indoor space or newly finished rooms in a short period of time, and the like; and at the same time, theproduct has excellent antibacterial properties and formaldehyde scavenging performance.

The invention provides shell powder putty and a preparation method and application thereof. The shell powder putty is prepared from shell powder, styrene-acrylic emulsion, modified mullite powder, active oxygen diluting agents, organic silane coupling agents, adhesion reinforcing agents, defoaming agents, gel agents, adhesives, composite inorganic micro powder, magnesium borate whiskers, sodium carboxymethylcellulose, heavy calcium carbonate and nano silicon dioxide. According to the shell powder putty, the good stability, adhesion strength, formaldehyde removing capacity, harmful gas removing capacity and appearance quality are achieved through selection and synergy of specific components, usage of the specific preparation method and the like, and therefore the very wide actual application value is achieved in the fields such as building, decorating and coating.

The invention discloses a preparation method of silk fibre with a function of removing formaldehyde, mainly comprising the following steps: (1) dissolving procyanidin with the weight equivalent to 8-12 percent of the silk fibre into water, adding 0.2-0.5 milliliters of glacial acetic acid per each litre of water into the solution and uniformly stirring, adding ferrous sulphate into the solution according to the mass ratio of the ferrous sulphate to the procyanidin of 1 to 1-3 and stirring, adding a sodium bicarbonate solution into the solution to regulate the pH value of the mixing solution to 5-8, increasing the temperature of the mixing solution to 50-60 DEG C, and preserving the heat of the mixing solution for 20-40 minutes; (2) adding 0.5 gram of peregal O and 2-10 grams of salt intoeach litre of the obtained mixing solution and uniformly stirring; (3) adding the silk fibre into the obtained mixing solution and processing for 1-12 hours under the conditions that temperature is 25-90 DEG C and liquor ratio is 1 to 20-40, and then taking the silk fibre out and washing and drying the silk fibre. The obtained silk fibre can enable the removal rate of the formaldehyde contained inindoor air to achieve more than 75 percent.

The invention discloses a preparation method for an adsorption catalyst for removing indoor formaldehyde. The method comprises the following steps that zeolite powder is added into a thick salpeter solution for even stirring, hydrogen peroxide is added for stirring, and then filtering is performed to obtain a first material; the first material is added into a sucrose solution for even stirring and standing, sintering is performed after filtering, and smashing is performed to obtain a second material; manganese nitrate and cerium nitrate are added into water to be dissolved thoroughly to obtain a mixed solution, the second material is added into the mixed solution for even stirring, sintering is performed after standing is performed, the material is taken out, smashed and put into an ammonium chloride solution for stirring and standing, and then drying is performed to obtain the adsorption catalyst for removing indoor formaldehyde. The preparation method is simple, raw materials are easy to obtain, the obtained adsorption catalyst for removing indoor formaldehyde is high in formaldehyde adsorption capacity, the formaldehyde can be oxidized and degraded while being adsorbed, and the formaldehyde removal effect is good.

The invention discloses a water-resistant environment-friendly waterborne coating. The water-resistant environment-friendly waterborne coating comprises, by weight, 90-110 parts of modified polyurethane emulsion, 15-20 parts of pigment, 13-15 parts of filler, 2-4 parts of C-12 alcohol ester, 2-4 parts of tristearin, 0.2-0.4 part of flatting agent, 0.03-0.05 part of antifoaming agent, 0.1-0.3 part of wetting agent, 0.4-0.6 part of hydroxyethyl cellulose, 0.8-1 part of vinyl trimethoxy silane,0.2-0.4 part of mildew preventive and 10-15 parts of water. The water-resistant environment-friendly waterborne coating has the advantages of high resistance to water and corrosion, environmental friendliness and excellent anti-ultraviolet performance.

The invention discloses superfine fiber polyurethane suede leather capable of removing formaldehyde and a preparation method of the superfine fiber polyurethane suede leather. The preparation method comprises the following steps: superfine fiber suede leather is dried and impregnated in a formaldehyde removing treating agent; the superfine fiber suede leather is dried, and the superfine fiber polyurethane suede leather capable of removing formaldehyde can be obtained, wherein the formaldehyde removing treating agent contains a nano-TiO2 photocatalyst and a catalytic promoter. The catalytic promoter is added to the treating agent, and the required light source wavelength of nano-TiO2 for decomposing formaldehyde is extended from ultraviolet light smaller than 388 nanometers to common visible sunlight smaller than 600 nanometers, so that the superfine fiber polyurethane suede leather has a good formaldehyde removing effect in a common daily living environment.

The invention discloses an LED device with sterilization, formaldehyde removal and illumination functions.An LED light source comprises an UV-LED module and a white LED module.The UV-LED module comprises UV-C LED modules and UV-A LED modules.A nanometer titanium dioxide thin film is arranged in the irradiation area of the UV-LED module.The wave band of the UV-C LED modules is 250-280 nm.The wave band of the UV-A LED modules is 315-400 nm.The visible light wave band of the white LED module ranges from 380 nm to 780 nm.The LED light source has at least four spectrum wave crests corresponding to the LED modules.A spectrum generated by the UV-A LED module intersects with white light generated by the white LED module.The near ultraviolet band of the UV-A LED modules forms a compensation spectrum used for conducting color development compensation on the white light generated by the white LED module.Because the three sterilization, formaldehyde removal and high-color-rendering-property illumination functions are integrated on the same LED device at the same time, the LED device can be widely applied to home wardrobes, cabinets and water heating sanitary products.

The invention discloses a domestic formaldehyde removal device and relates to the technical field of formaldehyde removal; the domestic formaldehyde removal device comprises a housing, an air inlet, an air outlet, an ultraviolet lamp, a formaldehyde adsorbing mesh, an activated carbon adsorbing mesh, a microbial purifying column, an absorbing liquid tank, a fixing plate, and a fan; the formaldehyde adsorbing mesh is dipped with titanium dioxide solution; activated immobilized microbial spheres are arranged in the microbial purifying column; melamine solution is loaded in the absorbing liquid tank; titanium dioxide solution on the formaldehyde adsorbing mesh may be irradiated with the ultraviolet lamp so that the titanium dioxide solution engages in photocatalytic reaction and formaldehyde in air is oxidatively decomposed; formaldehyde is decomposed by the immobilized microbial spheres in the microbial purifying column; indoor air is purified via the activated carbon adsorbing mesh; finally, formaldehyde is further absorbed by the melamine solution in the absorbing liquid tank. The domestic formaldehyde removal device is suitable for removing indoor formaldehyde at any time, is simple in structure and convenient to operate and is good in formaldehyde removal effect.

The invention relates to the technical field of formaldehyde and in particular to a natural plant type formaldehyde elimination agent and a preparation method thereof. The natural plant type formaldehyde elimination agent is prepared from the following raw materials in percentage by weight: 3-5% of persimmon tannin, 0.2-0.3% of a plant amino acid antibacterial agent, 1-4% of propylene glycol and the balance of water. The invention provides the natural plant type formaldehyde elimination agent and the preparation method thereof, and due to interactions of the persimmon tannin, the plant amino acid antibacterial agent, the propylene glycol, a polyphenolic substance with one amino acid at least, a stabilizer and a smell neutralizer substance, the prepared natural plant type formaldehyde elimination agent not only is good in formaldehyde removal effect and good in stability, but also has effects of bacterium inhibition and deodorization, and in addition is green and environment-friendly inthe formaldehyde removal process and free of secondary pollution in the formaldehyde removal process.

The present invention discloses a plasma air purifier filtration apparatus, which comprises a generating pole and a collecting pole, wherein the generating pole has functions of electric conduction and high voltage applying, and is provided with a certain gap for passing-through of dust, a certain distance is arranged between the generating pole and the collecting pole, and electric potential difference is formed between the generating pole and the collecting pole after electrifying. According to the present invention, the plasma air purifier filtration apparatus is provided; and the pore size of the media primary filtraction screen is about 5 [mu]m, the interval of the traditional metal collecting pole is 6 mm, and according to the coulomb law, the adsorption F of the media primary filtraction screen on the dust particles is theoretically increased by 1.44*10<6> times compared with the adsorption of the traditional metal collecting pole on the dust particles, and the good disinfecting and sterilizing effect and the good formaldehyde removing effect are provided.

The invention discloses a preparation method of an indoor high-efficient formaldehyde removal agent. The preparation method comprises the following steps: adding 4 to 10 parts by weight of triethylenetetramine and 5 to 12 parts by weight of diethylenetriamine into deionized water, stirring for 5 to 10 minutes, adding 0.2 to 2 parts by weight of modified titanium dioxide, uniformly stirring, and obtaining suspension a; and soaking 80 to 120 parts by weight of modified active carbon, 5 to 15 parts by weight of tourmaline, 4 to 15 parts by weight of bentonite, 10 to 25 parts by weight of attapulgite, and 10 to 18 parts by weight of sepiolite in the suspension a, drying, thus obtaining the indoor high-performance formaldehyde removal agent. The indoor high-performance formaldehyde removal agent prepared by the method of the invention is excellent in formaldehyde removal performance, and by virtue of test, the formaldehyde degradation rate in 24 hours reaches 99 percent or above.

The invention discloses a synthetic method of a sepiolite / nano TiO2 composite material. According to the method, sepiolite and tetrabutyl titanate are taken as raw materials, and the sepiolite / nano TiO2 composite material is synthesized with an in-situ polymerization method. The method comprises the steps as follows: 1), the sepiolite, the tetrabutyl titanate and ethyl alcohol are mixed, stirred, dissolved and subjected to ultrasonic dispersion; 2), the temperature is raised gradually until the ethyl alcohol is volatilized thoroughly, hydrochloric acid and water are added, heating is performed continuously, and the water is volatilized, so that a dried solid is obtained; and 3), the dried solid is washed for a plurality of times and then heated and dried, a dried component is obtained, then the dried component is calcined, and powder, namely, the sepiolite / nano TiO2 composite material, is obtained. With the adoption of the method, the composite material which has a good formaldehyde-removing function can be prepared.

The invention discloses a formaldehyde eliminating coating with dual functions of adsorption and decomposition, which solves the problem that the existing coatings release harmful substances such as formaldehyde into air and have no function in eliminating formaldehyde. The formaldehyde eliminating coating comprises the following components by weight percent: 25-30% of coarse whiting, 10-15% of emulsion, 4-10% of calcined kaolin, 4-10% of washed kaolin, 4-10% of titanium dioxide, 4-10% of sepiolite or nanometer TiO2 composite material, 0.1-0.6% of dispersing agent, 0.1-0.6% of wetting agent, 0.1-0.6% of antifoaming agent, 0.1-0.6% of multifunctional assistant, 0.1-0.6% of mildew preventive, 0.1-0.6% of coalescing agent, 0.1-0.6% of antifreezing agent, 0.1-0.6% of bactericide, 0.1-0.6% of thickener, and 25-30% of water. The invention also provides a preparation method of the coating. The coating has very strong function in eliminating formaldehyde, and is safe and reliable.

The invention discloses a processing method for preparing a formaldehyde-removing sun-shading material by a graft polymerization method, belongs to the technical field of processing of composite functional materials, and aims to carry out light alkali pretreatment on a polyester fabric to generate hydroxyl on the fiber surface, and then react with a vinyl-containing alkoxy silane coupling agent to introduce vinyl into the polyester surface; secondly, the modified polyester fabric is padded with a photoinitiator and methacrylhydrazine, graft polymerization is initiated under ultraviolet irradiation, and polymethacrylhydrazine is formed on the surface of the fabric; and finally, coating the back surface of the polyester fabric, and baking to prepare the formaldehyde-removing sun-shading material. The method comprises the following specific process steps: (1) polyester surface pretreatment; (2) vinylation of polyester; (3) surface graft polymerization; and (4) processing the composite coating. The sunshade material prepared by the method is obvious in formaldehyde removal effect, low in energy consumption and low in strength loss in the processing process, and lasting in finishing effect.

The invention belongs to the technical field of disinfectants, and particularly relates to a slow-release chlorine dioxide disinfectant and a preparation method thereof. The invention discloses a slow-release chlorine dioxide disinfectant. The disinfectant comprises a slow-release agent and a chlorine dioxide generator, wherein the chlorine dioxide generator comprises the following components in parts by weight: 10-20 parts of chlorite, 10-15 parts of an activating agent and 3-6 parts of a filling agent. According to the slow-release chlorine dioxide disinfectant prepared by the invention, theaction of the external environment on chlorine dioxide is isolated, the thermal stability, the light stability and the transportation impact stability of chlorine dioxide are improved, and the slow-release chlorine dioxide disinfectant has high safety, controllable release speed and double effects of slow release and safety explosion prevention; the initial chlorine dioxide content and the long-time chlorine dioxide content of the slow-release chlorine dioxide disinfectant prepared by the method are optimal for air purification effect, escherichia coli sterilization effect and formaldehyde removal effect, and the slow-release chlorine dioxide disinfectant is low in unit disinfection efficiency cost, convenient to use and wide in applicability.

The invention provides a plant self-cleaning and formaldehyde removing essence, a preparation method and a self-cleaning coating. The plant self-cleaning and formaldehyde removing essence comprises the following raw materials: 65-80 weight parts of water; 5-15 weight parts of a plant extract; 0.1-0.3 weight part of nano-titanium dioxide; and 5-30 weight parts of a chain nano-silica precursor. Theself-cleaning coating formed according to the plant self-cleaning and formaldehyde removing essence of the embodiment in the invention has self-cleaning and anti-graffiti functions, the self-cleaningand anti-graffiti rate is greater than or equal to 97%, and the coating also has the effect of radiation protection and rapid formaldehyde removal.

The invention discloses a method for extracting, from myrobalan, a finishing agent having a function of removing formaldehyde, and applications thereof. The plant myrobalan is mechanically crushed and added into an aqueous solution which has the pH value of 8-12 and is 5-20 times as much as the plant myrobalan, the pH value of the solution is regulated and then the solution is heated up to 95-100 DEG C, followed by heat preservation for 60-90 minutes and filtration; filtration residues are continued to be leached for 30-45 minutes by a diluted alkaline solution which has the pH value of 8-12 and is 5-10 times as much as the water, the leaching liquor is filtered and combined twice, and powdered solids are obtained by condensation, solidification and crush. The finishing agent is used for the preparation of protein polyamide fiber or textile having the function of removing formaldehyde, or the preparation of cellulose fiber or textile having the function of removing formaldehyde. The invention is simple in extraction technology, which causes no environmental pollution, safe in being worn, which has no carcinogenic, teratogenic effect or causes no allergy, and is excellent in the compatibility with ecological environment and is biologically degradable; the myrobalan is abundant in raw materials and convenient in use, which can be applied not only to clothes textiles, but also to household textiles.

The invention discloses an interior decoration coating for removing formaldehyde, and a preparation method thereof. The coating comprises aqueous polyurethane, aqueous epoxy resin, graphene oxide, nano-silica, alumina, diatomite, active carbon, a formaldehyde oxidation catalyst, a stabilizer and an antifoaming agent. The preparation method comprises the following steps: carrying out a modifying reaction on the aqueous polyurethane, aqueous epoxy resin and graphene oxide; adding the diatomite, active carbon and the antifoaming agent, uniformly mixing and stirring above substances, adding the nano-silica and alumina, and carrying out shear dispersing for 10-20 min; and adding the formaldehyde oxidation catalyst and the stabilizer, and carrying out ultrasonic dispersing for 10-20 min to obtain the decoration coating. The coating has the advantages of good coating effect, excellent waterproof property, excellent scratch resistance and good formaldehyde removal performance, can be applied to interior decoration to provide a clean and safe living environment for people, and has good application values.

The invention discloses a formaldehyde-removing resin composite material and a preparation method thereof. The method includes the steps of firstly, performing amination preprocessing on polyacrylonitrile macroporous resin; secondly, adding the polyacrylonitrile macroporous resin of the first step into a diatomite / porous carbon dispersing solution, performing ultrasonic stirring, standing for 60 minutes, and drying under 60-80 DEG C to obtain the formaldehyde-removing resin composite material, wherein antibacterial composite materials account for 0.5-1% of the total weight of the polyacrylonitrile macroporous resin, and diatomite / porous carbon accounts for 0.5-1% of the total weight of the polyacrylonitrile macroporous resin. The formaldehyde-removing resin composite material and the preparation method thereof have the advantages that diatomite and the antibacterial composite materials are reasonably coordinated to allow the resin material to have excellent antibacterial and formaldehyde-removing performance, the requirements of the multifunctional resin material are satisfied, and the application of the resin material is further expanded.

The invention discloses an efficient formaldehyde removing composition, and relates to the technical field of environmental protection. The efficient formaldehyde removing composition comprises waterand ethyl acetoacetate, and further comprises copper ions or a pH adjusting agent for adjusting the pH of the formaldehyde removing composition to be greater than or equal to 5. The composition disclosed by the invention has a remarkable formaldehyde removal effect, is safe to people and articles, has simple production process, and can be used for treating formaldehyde pollution problems in plates, furniture, textiles, new decorations and other fields.

The invention discloses a preparation method of a formaldehyde removal coating, and belongs to the technical field of coatings. The coating comprises, by weight, 50 parts of a fluorocarbon emulsion, 10 parts of nanometer titanium dioxide, 6 parts of modified silica, 4 parts of modified magnesium hydroxide, 3 parts of Texanol, 5 parts of zinc borate, 8 parts of diammonium hydrogen phosphate, 4 parts of plant essential oil, 2 parts of a preservative, 2 parts of a leveling agent, 0.8 part of an ultraviolet absorber, 1 part of a dispersant, 0.5 part of an antifoaming agent, 0.5 part of a thickener, 10 parts of ethylene glycol and 10 parts of water. The formaldehyde removal coating prepared in the invention has the advantages of small environmental pollution, high strength, excellent formaldehyde removal ability, and good resistance to corrosion, water, flame and high temperature.

The invention discloses a purification assembly of a domestic formaldehyde scavenging device. The purification assembly of the domestic formaldehyde scavenging device relates to the technical field of formaldehyde scavenging, is arranged in a shell, and sequentially comprises a formaldehyde adsorption net, an activated carbon adsorption net, a microorganism purification column and an absorption liquid tank from an air inlet to an air outlet; a titanium dioxide solution is soaked on the formaldehyde adsorption net; activated immobilized microorganism bobbles are arranged in the microorganism purification column; a melamine solution is filled with the absorption liquid tank. According to the purification assembly of the domestic formaldehyde scavenging device and an installation method thereof, the assembly is reasonable and novel in structure design, and the inner wall of the shell made of polyamide materials is subjected to anti-corrosion treatment during the installation method, so that the corrosion resistance of the formaldehyde scavenging device is better.

The invention provides a photocatalysis material with nano TiO2 loaded on kieselguhr white carbon black used as a carrier and a preparation method of the photocatalysis material, belongs to the technical field of photocatalysis materials, and aims to provide the photocatalysis material with the nano TiO2 loaded on the kieselguhr white carbon black used as the carrier and a preparation method of the photocatalysis material; the photocatalysis material is high in loading capacity, high in whiteness, good in photocatalysis effect and low in cost,. The material provided by the invention has whiteness of 80-85, and consists of the kieselguhr white carbon black and the nano TiO2 loaded on the kieselguhr white carbon black, wherein the content of silicon dioxide in the kieselguhr white carbon black is not less than 98%, the particle size is 15-40 mu m, ignition loss is 2-2.5%, the specific surface area is 490-530m<2> / g, and the pore volume is 0.6-0.7ml / g; the loading capacity of nano TiO2 is 35-40%, and the grain fineness is less than or equal to 15nm. The material is low in cost, large in specific surface area, high in loading capacity of titanium dioxide on the surface, low in grain fineness, excellent in photocatalysis property and good in formaldehyde removal effect.

The invention discloses an amine catalyst for polyurethane foam. The amine catalyst comprises the following raw materials in percentage by weight: 30-40% of dipropylene glycol, 25-35% of a ZF10 catalyst, 10-20% of an aldehyde remover and 10-18% of an assistant. The amine catalyst for polyurethane foam disclosed by the invention has high catalytic activity and is capable of facilitating rapid completion of a polymerization reaction between isocyanate and polyether polyol under the same reaction condition; and the prepared polyurethane slurry is excellent in physical properties, has higher elongation at break and higher tensile strength and breaking strength at the elongation of 100% and 300%, and is excellent in formaldehyde degradation effect, safe and environment-friendly.