[ Chinese wardrobe net ] The wardrobe is the necessary furniture in the bedroom, but many of them have not understood the knowledge of the wardrobe they use. Most consumers want to choose the right wardrobe when purchasing a wardrobe, but also consider the green safety of the wardrobe, worry about whether the chemical composition in the wardrobe is harmful to the human body. How should we weigh it?
First, the number one chemical composition in the closet: formaldehyde
Formaldehyde? Chemical formula: CH2O
Chemical properties: The formaldehyde in the closet is mainly released from the adhesive of the Cabinet door and the cabinet material (usually urea-formaldehyde glue) under certain temperature and humidity. Formaldehyde is a colorless, highly irritating odor. Soluble in water, alcohol and ether. Formaldehyde is gaseous at normal temperature and has high free toxicity. If a qualified adhesive is used, the release of formaldehyde is relatively small under normal room temperature conditions, and the amount of formaldehyde released is proportional to temperature and humidity.
Industrial formaldehyde solution
It is well known that furniture contains formaldehyde more or less, especially furniture made from sheet metal. Nowadays, quite a lot of wardrobes sold on the market are made of artificial boards, so the wardrobe is a piece of furniture that releases more formaldehyde.
So what are the hazards of formaldehyde to the human body? According to Xiaobian, direct contact with formaldehyde can cause dermatitis, pigmentation and necrosis. Frequent inhalation of a small amount of formaldehyde, can cause chronic poisoning, mucosal congestion, skin irritation, atopic dermatitis, nail keratosis and fragility, nail bed pain. Systemic symptoms include headache, fatigue, poor appetite, palpitations, insomnia, weight loss, and autonomic disorders.
Since we know that formaldehyde can bring us so many hazards, we should seriously consider when purchasing wardrobes.
Xiaobian suggestion:
1. Ask the seller for the test report issued by the national testing agency, which should meet the GB18580 standard. The environmental protection grade indicated in the report should meet the E0 and E1 standards. The copy of the report should be stamped with the official seal of the manufacturer;
Plate knowledge:
According to China's environmental protection standards, according to the concept of formaldehyde emission limit, the formaldehyde limit level in the board is divided into three levels, E2≤5.0mg/L, E1≤1.5mg/L, E0≤0.5mg/L. In China, plates can reach the E2 standard, and E2, E1 and E0 plates can be called environmentally friendly plates.
2, the newly bought wardrobe can be placed in a ventilated and dry place for a period of time, under normal climatic conditions, the temperature will increase the concentration of formaldehyde in the air by 8 ° C will double; the humidity will increase by 12%, the amount of formaldehyde will increase by about 15% . Air conditioning and fresh air system devices can also be used to adjust the indoor temperature and humidity and fresh air volume, so that formaldehyde emission can be moderately controlled;
3, to solve the problem fundamentally, select some famous wardrobe brands, so that the quality of the product is guaranteed, the production process of the wardrobe will be more stringent, so the control of formaldehyde emission is more secure;
4, when buying a wardrobe, sniffing with the nose, if you feel a strong pungent smell, and even accompanied by tears and other discomfort, it is not appropriate to buy such a wardrobe;
5. Observe the decoration method of the surface of the wardrobe to see if it adopts the qualified edge sealing method, especially for the wardrobe with artificial panels; the edge sealing is 1.5mm, and the environmental protection level reaches the level of E1.
6. Try to choose the wardrobe with starch glue as the adhesive. The starch glue takes the plant as the raw material and will not release the formaldehyde. The wardrobe insect-proof and breathable design effectively removes the formaldehyde.
7. Before using the new wardrobe, you can use some formaldehyde scavengers or activated carbon with guaranteed quality, which can also remove a certain amount of formaldehyde.
Third, the wardrobe is brightly colored, the paint may contain lead
Lead chemical formula: Pb
Chemical properties: Lead is a soft, heavy metal that is toxic and is an extended weak metal. At room temperature, lead acts with oxygen, water and carbon dioxide in the air. In the presence of air, lead reacts slowly with water to form lead hydroxide.
Wardrobe plate lacquered
There are still wardrobes on the market that use paint finishes, and there are not many paints with high environmental protection, and the price is high. Most of the paint thinners are aldehydes and benzenes, and their harmfulness is obvious. Moreover, the paint itself contains more heavy metals (such as lead and cadmium), which have a great impact on human health. The toxicity of lead ions is the basal activity of cysteine ​​in divalent lead and protein molecules, which denatures proteins and loses physiological activity, destroying the normal chemical reactions of cells.
Lead is harmful to the nervous system, bone hematopoietic function, digestive system, and male reproductive system. In particular, children with a brain that is sensitive to the nervous system have a special sensitivity to lead. After all, lead is not a volatile substance like benzene and formaldehyde. It is not good to prevent it. If you can pay attention, lead pollution in home improvement will be easier to control.
Xiaobian suggestion:
1. Try to avoid buying wardrobes that use paint and paint. If necessary, try to use high-quality products with high environmental protection paints.
2, you can choose to use the paint to make the finished wardrobe, the paint has good sealing to the board, the release of VOC from the thinner in the paint is small, and the paint taste is light;
3, wash hands frequently, cleanliness, this can effectively reduce the intake of lead through the skin and digestive tract.
Second, the wardrobe sheet printing commonly used melamine
Melamine?? Chemical formula: C3H6N6
Chemical characteristics: melamine traits are pure white monoclinic crystals, odorless, soluble in hot water, slightly soluble in cold water, very slightly soluble in hot ethanol, low in toxicity.
Perhaps many netizens mentioned that melamine will also smell the color. The melamine "poisoned milk powder" incident in the past few years left a deep impression on the nationals, and even more melamine hearts. However, melamine is indeed a commonly used chemical raw material. The chemical properties of the melamine board determine its stability. Therefore, the quality of the high-grade melamine board is qualified by sampling. The melamine in the plate is not harmful to the human body as long as it is not eaten, and the melamine is normally under the melamine. Not volatile, will not cause harm to the human body.
Melting paper with melamine as a veneer
So how does melamine apply to the closet? Paper with different colors or textures is immersed in a melamine resin adhesive, and then dried to a certain degree of solidification, and laid on a surface of a particle board, a medium density fiberboard or a hard fiberboard, and a heat-pressed wardrobe decorative board. If the treatment is good, it is a very environmentally friendly family material. The melamine finish will effectively seal the formaldehyde in the board, provided that the sealing is sealed. Summarize its advantages and disadvantages as follows:
Advantages: The surface texture is strong, flat, wear-resistant, acid and alkali resistant, high temperature resistant, moisture proof, and very environmentally friendly, hard and not easily deformed.
Insufficient: the edge seal is easy to collapse (a certain degree of increase in the release of formaldehyde), the glue marks are more obvious, the color is less, and the surface cannot be engraved.
So how do you buy a melamine-finished wardrobe?
Xiaobian suggestion:
When selecting the wardrobe made of this kind of board, in addition to whether the color and texture are matched with the home decoration style, the appearance quality can be discerned in several aspects. Whether the edge banding is suitable, firm, with or without stains, scratches, indentations, pores, uniform color, whether there is bubbling, whether there is partial paper tear or defect. When using, be careful not to be soaked in water for a long time to avoid cracking of the edge.
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