E0 is the amount of formaldehyde released less than or equal to 0.5 mg/l.
E1 is the amount of formaldehyde released less than or equal to 9.0mg/100g.
E2 is the amount of formaldehyde released less than or equal to 30.0mg/100g.
l Harm of formaldehyde:
Formaldehyde is a colorless, harmful gas that can cause cancer in the nose, mouth, throat, skin and digestive tract. And the formaldehyde in the residence basically comes from all sorts of board, furniture and paint wait for adornment material.
According to national mandatory standard, after closing door window 1 hour, in every cubic metre indoor air, formaldehyde release quantity must not exceed 0.08 milligram; If it reaches 0.1-2.0 mg, 50% of normal people can smell bad odor. Reach 2.0-5.0mg, eyes, trachea will be strongly stimulated, sneezing, cough and other symptoms; More than 10 mg, dyspnea; Reaching more than 50 milligrams can cause serious diseases such as pneumonia and even death.
If the decoration of the user is reasonable, environmental protection, and under the condition of constant ventilation and ventilation, indoor formaldehyde can be generally reduced to the permitted level in about 20 days.
l Five factors influencing the formaldehyde release of furniture
The factors influencing the formaldehyde release of furniture are complicated. Despite the overall product, in terms of its base material, man-made board, there is a lot of factors influencing the man-made board of formaldehyde to release material, analysing, and with the resin content, hot-pressing conditions and post-processing are likely to impact on formaldehyde emission.
Decorative way
The decorative pattern of furniture surface is very obvious to formaldehyde sealing effect. In the specific implementation process, attention should be paid to the selection of low formaldehyde release adhesive, various decorative materials and coatings as well as a reasonable process to ensure that the decoration does not lead to new formaldehyde release.
Loading rate
The so-called bearing rate is the ratio of the surface area of indoor furniture exposed to the air to the interior volume. The higher the carrying capacity, the higher the concentration of formaldehyde. Accordingly, in the case that the function is satisfied basically, should reduce the number of furniture in indoor space as far as possible, reduce formaldehyde in furniture to send out thereby.
Diffusion way
It is worth emphasizing that the importance of plate furniture sealing edge. When designing furniture, under the premise of meeting strength and structure, can use sheet board as far as possible.
Using environment
The use environment has a great influence on the formaldehyde emission of furniture. Temperature, humidity and ventilation can affect formaldehyde emission. In normal climate condition, the temperature of 8 ℃, the concentration of formaldehyde in the air will be doubled; Humidity increases by 12% and formaldehyde release increases by around 15%. Therefore, under the precondition of conditions, air conditioning and fresh air system devices can be used to adjust indoor temperature and humidity and new air volume, so that formaldehyde emission can be controlled appropriately.
Display time and conditions
Furniture formaldehyde concentration and is dominated by time, after the production should be dominated by a period of time before use, and when put under high temperature and high humidity environment, accelerate the formaldehyde emissions and to reduce pollution in the future use.