The difference between formaldehyde standards E0, E1, E2
The country has not yet officially released the national standard for the E0 level. At present, the so-called E0 standard is mostly a convention in the industry.
E0 means: formaldehyde emission of 0.5 mg / liter or less
E1 means: formaldehyde emission of 9.0mg/100g or less
E2 means: formaldehyde emission of 30.0mg/100g or less
The harm of formaldehyde:
Formaldehyde is a colorless, harmful gas that can cause cancer in the nose, mouth, throat, skin and digestive tract. The formaldehyde in the house is mainly derived from various kinds of decorative materials such as wood boards, furniture and paints.
According to the national compulsory standard, after closing the door and window for 1 hour, the amount of formaldehyde released per cubic meter of indoor air should not exceed 0.08 mg; if it reaches 0.1-2.0 mg, 50% of normal people can smell odor; reach 2.0-5.0 mg. Eyes and trachea will be strongly stimulated, and symptoms such as sneezing and coughing will occur; if it reaches 10 mg or more, it will be difficult to breathe; if it reaches 50 mg or more, it will cause serious diseases such as pneumonia and even death.
If the user's decoration is reasonable, environmentally friendly, and under the conditions of frequent ventilation, indoor formaldehyde can generally drop to the allowable level in about 20 days.
Harm and prevention of formaldehyde exceeding the standard:
At present, the rise of formaldehyde has become the first type of carcinogen in human life.
Formaldehyde, which used to be considered a suspected carcinogen, was listed as the first class of carcinogens by the International Agency for Research on Cancer (IARC) last year. There is enough evidence to prove that formaldehyde causes nasopharyngeal, nasal, and sinus cancer in humans, and there is evidence that formaldehyde can cause leukemia. On January 31 this year, the United States Department of Health and Human Services and the Public Health Bureau issued a report on carcinogens, including formaldehyde in a class of carcinogens.
Formaldehyde comes from 4 aspects:
Environmental experts believe that the current formaldehyde in urban and rural households in China mainly comes from four aspects: First, artificial wood panels such as plywood, blockboard, medium density fiberboard and particleboard used for interior decoration. Because formaldehyde has strong adhesiveness and also has the functions of strengthening the hardness and anti-insect and anti-corrosion of the board, the adhesive used in the production of wood-based panels is urea-formaldehyde resin mainly composed of formaldehyde; the second is furniture made of wood-based panels. A comparative test conducted by the Beijing Consumers Association showed that among the 60 sets of medium-density furniture samples extracted in Beijing, 29 sets of formaldehyde exceeded the relevant national standards, and the over-standard rate was as high as 48.23%. The third was the other containing formaldehyde. Decorative materials such as white latex, foam, paints and coatings.
Experts specially reminded that latex adhesives are widely used in wood decoration and wall treatment in decoration and decoration, especially formaldehyde in the latex sealed on the wall is difficult to remove; fourth is interior decoration textiles, including bedding, wall coverings, wallpaper , chemical fiber carpets, curtains and fabric furniture. In textile production, in order to increase the anti-wrinkle performance, waterproof performance, fire resistance, often add some formaldehyde-containing additives.
Experts support anti-formaldehyde:
Decoration and decoration: In particular, the design should fully consider the carrying capacity and ventilation of the indoor space; try to use non-toxic, less toxic, non-polluting and less polluting construction techniques. For example, the slash at the artificial board should be coated with paint to make it full. Curing, to prevent the emission of formaldehyde in the board; strictly in accordance with national standards to select qualified interior decoration materials, the state has already formulated ten mandatory standards for "limitation of harmful substances in interior decoration materials".
Buy furniture: buy furniture that meets national standards, ask for "Furniture Instructions for Use" to see if the content of formaldehyde is indicated. At the same time pay attention to the materials used in furniture, it is best to use wood materials to seal the furniture with a higher degree of furniture; new furniture should not be rushed into the room, it is best to let the harmful gases in the furniture release as soon as possible; new bought artificial When using the wardrobe made of wood, try not to put underwear, pajamas and children's clothing on it; if you buy or use the furniture made of large core board, you will find irritating and spicy eyes when using it, and find that family members, especially children, often appear. Skin allergies, emotional upset, poor diet, continuous cough and other symptoms should be considered as a cause of formaldehyde, and effective treatment should be taken as soon as possible.
Detection and treatment: newly renovated houses and newly purchased furniture, or when the indoor air quality is not good, test; after the decoration, it is not suitable to stay immediately, should open the window, ventilation to let the indoor polluted air dissipate; if the indoor environment has formaldehyde Excessive standards should be governed in a timely manner. At present, formaldehyde treatment products mainly include: Air Purifier, which has certain adsorption effect on indoor formaldehyde and other pollutants; deodorant and formaldehyde trapping agent can be used in decoration engineering to effectively reduce free formaldehyde in artificial board; harmful gas adsorber, Furniture adsorption treasure can catalyze the decomposition of indoor formaldehyde and other harmful gases; formaldehyde sealant, painted on the interior wall and wood-based panels of unpainted furniture, can reduce the amount of formaldehyde released; use plants for purification, spider plant, aloe vera, dragon The tongue and the like can reduce the concentration of formaldehyde in the room.
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