The children's coat with a price of 998 actually tastes very strong, and it is formaldehyde, which can't be removed at all!

Try washing it with water. General Manager Zhang of Shijiazhuang Bi Haubert Environmental Protection Engineering Co., Ltd., a designated enterprise in in addition to formaldehyde, Shijiazhuang, said in an interview with Hebei TV: Formaldehyde, chemical formula HCHO, molecular formula 30.03, also known as formaldehyde. Colorless gas, with special pungent smell, can stimulate people's eyes, nose and so on. The relative density of gas is 1.067 (air = 1), and the density of liquid is 0.8 15g/cm3(-20℃). Melting point -92℃, boiling point-65438 09.5℃. Soluble in water and ethanol. The highest concentration of aqueous solution can reach 55%, usually 40%. It is called formaldehyde water, commonly known as formalin, which is a colorless liquid with an irritating smell.

The general manager of Shijiazhuang Bi Haubert Environmental Protection Engineering Co., Ltd., a designated enterprise for formaldehyde detection and treatment in Shijiazhuang, said that although formaldehyde is a toxic substance, it is inseparable from people's lives. It can be said that without formaldehyde, people's quality of life will be affected.

I. Application fields of formaldehyde:

1, wood

Used to produce urea-formaldehyde resin and phenolic resin. Formaldehyde and urea are mixed according to a certain molar ratio and react to form urea-formaldehyde resin. Formaldehyde and phenol react in a certain molar ratio to produce phenolic resin. The irreplaceable position of formaldehyde in wood processing industry is being replaced by MDI glue.

2. Textile industry

Application of formaldehyde in textile industry

The use of formaldehyde should be involved in the resin finishing process of clothing. In the fabric production of clothing, in order to achieve the functions of wrinkle resistance, shrink resistance and flame retardant, or to maintain the durability of printing and dyeing, or to improve the hand feel, formaldehyde needs to be added to the auxiliary. Cotton textiles are often used as printing and dyeing auxiliaries together with formaldehyde because cotton textiles are prone to wrinkling. The stiffness of cotton fabric can be improved by using formaldehyde-containing additives. Textiles containing formaldehyde will gradually release free formaldehyde when people wear and use them, which will cause respiratory inflammation and skin inflammation through the contact between human respiratory tract and skin, and will also cause irritation to eyes. Formaldehyde can cause allergies and cancer. Manufacturers use dyeing auxiliaries containing formaldehyde, especially some manufacturers use cheap auxiliaries with high formaldehyde content in order to reduce costs, which is very harmful to human body.

3. Anticorrosive solution

Formaldehyde is a substance released by decomposition of formaldehyde sodium bisulfite at above 60℃. Colorless, irritating and soluble in water. 35% ~ 40% aqueous formaldehyde solution, commonly known as formalin, has antiseptic and bactericidal properties, and can be used to soak biological specimens and disinfect seeds, but it is easy to make specimens brittle due to protein degeneration.

The main reason why formaldehyde has antiseptic and bactericidal properties is that amino groups on protein, which constitute organisms (including bacteria), can react with formaldehyde.

Second, what is the harm of formaldehyde?

The general manager of Shijiazhuang Beite Environmental Protection Engineering Co., Ltd., a designated enterprise in in addition to formaldehyde, Shijiazhuang, said:

When the formaldehyde concentration reaches 0.06-0.07mg/m3 per cubic meter of air, children will have mild asthma;

When formaldehyde in indoor air reaches 0. 1mg/m3, it will have peculiar smell and make people uncomfortable.

When formaldehyde reaches 0.5mg/m3, it can irritate eyes and cause tears;

Formaldehyde reaches 0.6mg/m3, which may cause throat discomfort or pain. When the concentration is high, it can cause nausea and vomiting, cough and chest tightness, asthma and even pulmonary edema;

When formaldehyde reaches 30mg/m3, people will die immediately.

Third, the symptoms of formaldehyde poisoning

Mild poisoning

Obvious eye and upper respiratory tract mucosal irritation symptoms. The main manifestations are conjunctival congestion, redness, dyspnea, heavy breathing, hoarse throat, dry or dull speech or wet greasy. Poisoned people can still feel their breathing getting thicker. Another specific symptom of mild formaldehyde poisoning is one to two degrees of throat edema.

Moderate poisoning

Cough, expectoration, chest tightness, dyspnea and the sound of dry and wet gongs. During chest X-ray, the lung texture becomes substantial, becoming scattered spots or flaky shadows, which is medical machine-made bronchopneumonia. The edema of throat is aggravated to grade three. Blood gas analysis will be accompanied by mild and moderate hypoxemia.

Severe poisoning

Lung and throat deterioration, pulmonary edema, fourth degree laryngeal edema, blood gas analysis is also serious, severe hypoxemia.

4. What are the most effective in addition to formaldehyde methods?

According to the work summary of 10, Mr. Zhang, a designated enterprise in in addition to formaldehyde, Shijiazhuang, thinks that some pollutants represented by formaldehyde have long-term volatility and releasability. For example, the release cycle of formaldehyde is 10- 15. At the current level of science and technology in the world, there is no molding technology that can completely eliminate its pollution at one time. At present, there are several commonly used indoor environmental pollution purification technologies at home and abroad, such as physical method, chemical method and biological method. Each technology has its own advantages and limitations, and it is difficult to achieve satisfactory results by using a single technology to treat various pollutants in the indoor environment. We need to combine several control technologies organically according to the specific pollution situation, so that all technologies can complement each other and achieve good pollution control effect.

On the basis of fully understanding the characteristics, sources and hazards of indoor environmental pollution, our company follows the principle of "safety, effectiveness, economy and feasibility" according to the actual pollution situation, adopts the comprehensive treatment technology of compound catalytic purification of indoor environmental pollution, and uses the existing indoor environmental pollution treatment technology and different construction technologies to treat it. Namely: suit the right medicine, comprehensive treatment, combination of spraying and releasing, and treatment based on syndrome differentiation.

(1) "Spray" means that most of the surface sprayed by the product can be treated with liquid in an indoor environment. On the one hand, the treated products constitute an artificial barrier between people and pollution sources, and the protection scope is the most comprehensive; On the other hand, the treated products can directly contact the pollution sources, and the pollution sources can be quickly and effectively removed, and the treatment effect is the best.

The series products of decoration pollution control treasure used by spraying method are mainly chemical action, and comprehensively utilize nano-materials, photo-oxygen control, biochemical engineering, composite antibacterial, nano-sustained release and other technologies. "Healthy titanium" as a new high-tech product of "photocatalyst" has better effect. "Healthy titanium is a composite of nano titanium dioxide and titanium phosphate. When "healthy titanium" is sprayed on the surface of an object, the surface attached with nano-titanium dioxide and titanium phosphate compounds will react like photocatalyst under the condition of light; When it comes into contact with oxygen and moisture in the air, it will react to generate trivalent ozone and divalent oxygen, and continue the trivalent and divalent redox reactions in an unstable state. O2 negative ions generated by redox reaction occasionally form peroxides in the middle of oxidation reaction, and then become powerful hydroxyl radicals (OH radicals) with oxidizing power through hydrogen peroxide. It is this hydroxyl radical that has the functions of decomposing organic matter, resisting bacteria, preventing mildew and deodorizing. " As an updated product of photocatalyst, healthy titanium has similar characteristics to photocatalyst, but it does not need illumination or ultraviolet rays.

(2) "Sticking" refers to sticking absorbent paper and non-woven fabrics coated with treatment ingredients on the surface of pollution sources that are not suitable for direct spraying. In order not to affect the use and the beauty of the room, try to stick them in a hidden place. Such as the lower surface of cabinets, drawers and tables; Top surface of cabinets, ceilings and mattresses; Floor, underground chemical fiber carpet. Adhesion is the evolution and extension of spraying technology.

(3) "Putting" means putting coconut shell activated carbon in furniture and putting air purifiers in rooms, offices and cars. Activated carbon is a porous carbonaceous material, which is internationally recognized as an efficient adsorption material. Suitable for eliminating pollution or odor in closed spaces such as drawers, cabinets and refrigerators. Ordinary coconut shell charcoal has a short validity period, generally about 3 months. If active substances with purification and decomposition function are added, the validity period can be extended to about 1 year. The main principle of the purifier method is to draw indoor air into the machine by using the air circulation principle, and then purify the air through the filter screen in the machine, filter cotton containing pollutant remover, activated carbon filter screen, negative ion generator, nano photocatalytic net and so on. It is very effective in eliminating free pollution, suitable for heavily polluted family spaces and public places, and is an important supplement to comprehensive chemical treatment. In addition, some green flowers and trees with purification function such as chlorophytum and ivy are placed indoors, which not only plays a role in greening and beautifying, but also is a useful supplement to comprehensive chemical management.

(4) "Demolition" refers to the removal of red and green natural granite stones such as particleboard, fiberboard and large core board which are rich in radon radiation and high pollutants in the indoor environment. In addition, if conditions permit, adding ventilation equipment is also an economical and effective method to reduce indoor environmental pollution.