Medium density fiberboard features
1. The internal structure is uniform, the density is moderate, the dimensional stability is good, the deformation is small, and the physical and mechanical properties are moderate.
2. The surface is smooth and smooth, and the machining performance is good. The thin wood or the pattern can be pasted on the cutting board, and the pattern is novel and beautiful. Therefore, it is deeply loved by people in home decoration, and is often used for making furniture and partitions.
The following aspects should be noted when using medium density fiberboard:
1. Check whether the thickness and density are uniform, whether the corners are damaged, whether there are delamination, bulging, carbonization, etc., and whether there is a soft part.
2. When conditions permit, a small piece of medium density fiberboard can be sawed in water with a water temperature of 20 ° C for 24 hours to observe the thickness change, and observe whether there is a small drum kit on the board surface. The thickness varies greatly, and there are small drums on the board surface, indicating that the board surface is poor in water resistance.
3. Select medium-density fiberboard with low release. When using olfactory smell, choose medium-density fiberboard with low irritating taste. The larger the odor, the higher the formaldehyde emission and the greater the pollution.
Fourth, the environmental protection grade of medium density fiberboard
National standard
According to the introduction of Loulan Yaju engineers, the national standard GB18580-2001 "decorative limits of formaldehyde in wood-based panels and their products for interior decoration and decoration materials" stipulates that MDF is divided into two grades of E1 and E2, and the formaldehyde emission limit of E1 grades is ≤9mg/100g (can be used directly indoors), E2 grade products are ≤30mg/100g (it must be allowed to be used indoors after finishing treatment). The test method uses a perforation extraction method. E1 grade is ≤1.5mg/L, and E2 grade is ≤5.0mg/L. The detection method is a 40 L dryer method.
In addition, in addition to the national standard, the EU also has its own E1 and E2 standards, and there is a certain difference from the national standard.
EU Standard-1 European Standard BS EN 13986:2004 "Performance, Conformity Assessment and Marking of Artificial Panels for Construction" There are specific indicators and methods for the detection of formaldehyde emission in E1 and E2 wood-based panel products. The E1 standard is ≤8mg/100g; the E2 standard is ≤30mg/100g. (perforation extraction method)
Another method is gas analysis: E1 grade release is ≤3.5mg/m2h, or ≤5mg/m2h (within 3 days of production); E2 grade is 3.5-8mg/m2h, or 5-12mg/m2h. (within 3 days of production)
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