In the modern decoration, a large number of composite sheets, adhesives and paints are used, which are the main sources of pollution of formaldehyde, benzene, ammonia, toluene, xylene and other toxic gases. Because the biggest source of toxic gas is the adhesive, most of the building materials have adhesive components. For example, urea formaldehyde resins based on formaldehyde are used as binders in various particleboards, medium density fiberboards, and plywoods on the market. The harm of these poisonous gases is very great. Every year, more than 100,000 people die from home decoration pollution.
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Use eye and nose to identify environmentally friendly wood.
Identification of furniture, wooden building materials, furniture, whether it is environmental protection, the first thing is to pass the nose, take a piece of wood, smell in the edge of the groove (if the furniture smells on the furniture surface and the door inside), if more pungent, that the amount of formaldehyde release comparison High is absolutely not optional. It is not enough to pass the smell, but further differentiation depends on the vision.
Method one: See certification.
Any wood, if declared environmental protection must have the National Environmental Protection Administration's green building materials ten ring certification mark. Wooden furniture requires certification from the China Quality Certification Center (CQC).
Method Two: Look at the report.
Floors and furniture need merchants to provide inspection reports of authorities above the provincial level. It is worth noting that the inspection report must be issued by the quality inspection department of the place of sale. In addition, furniture must provide product specifications, which were only recently mandated.
Method 3: Look at the rating.
The amount of formaldehyde released from wood is a certain standard. At present, the national standard for wood used for indoor use is E1, that is, the formaldehyde emission is 0.5mg/I~1.5mg/I; and the E0 standard with formaldehyde emission less than 0.5mg/I is the European standard that will be adopted in China. This wood is the most environmentally friendly on the market, but the price is also more expensive. The price of blockboard (sandwich panel) is above 140 yuan/m2; the price of decorative panel is also above 100 yuan/m2; and the floor is above 200 yuan/m2.
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Black Color Rebar Coupler, which is different from the Silver Color Rebar Coupler. It doesn't processed with strip the ex-circle. So this type of coupler keep the raw material color.
Only the color is black, the material is same with 45C or 40Cr material.
It is
used to rebar mechanical splicing in reinforced concrete structure, and
is designed to connect threaded rebar with diameter from 12mm to 50mm.
Black Color Rebar Coupler
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