Views:8 Author:Site Editor Publish Time: 2019-08-19 Origin:Site
Does Thick MDF wood cause health problems? Most people who ask this question are worried about using formaldehyde when building MDF. In fact, your worry is superfluous. Below I will tell you about the security of the thick MDF.
What you need to know about thick MDF
Note on choosing Thick MDF:
Thick MDF is made of wood fiber as the main material, through fiber separation, molding, drying, high pressure and other processes. The thick MDF features uniform internal structure, good machinability, easy engraving and various shapes. Thick MDF has good surface flatness, so when the surface needs to be boring and forming, and the pasting surface is softer material (such as blushing plastic blister), use thick MDF to ensure the smooth surface after lamination.
When the thick MDF is cut, a large amount of dust particles are released into the air. It is important that the respirator be worn and cut in a controlled, ventilated environment. It is a good practice to seal the exposed edges to limit the amount of emissions from the adhesive contained in this material.
Formaldehyde resins are commonly used to bond fibers in MDF. Testing has consistently shown that Thick MDF emits free formaldehyde and other volatile organic compounds at concentrations considered unsafe, at least a few months after manufacture. Cause health risks. Urea-formaldehyde is always slowly released from the edges and surfaces of the thick MDF. When painting, it is best to apply all sides of the finished product to seal in free formaldehyde. Waxes and oils can be used as oils, but the sealing effect is poor in free formaldehyde.
In the real world, whether these continuously released formaldehyde reaches harmful levels has not been fully determined. The main concern is the industry that uses formaldehyde. As early as 1987, the United States. The Environmental Protection Agency classified it as a "possible human carcinogen." After more research, the International Agency for Research on Cancer (IARC) classified it as "a possible human carcinogen" in 1995. Further information and an assessment of all known data led IARC to reclassify formaldehyde as "known human carcinogens".
According to the International Composite Board Emission Standard (ICBES), there are three types of formaldehyde in Europe, namely E0, E1 and E2. This classification is based on the measurement of formaldehyde emission levels. For example, E0 is classified as having less than 3 milligrams of formaldehyde per 100 grams of glue used in particleboard and plywood. In contrast, E1 and E2 are classified as 9 grams and 30 grams of formaldehyde per 100 grams of glue, respectively. There are variable certification and labeling programs around the world that can release formaldehyde explicitly, as the California Air Resources Board (CARB) does.
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. MDF can be divided into thin MDF and thick MDF according to thickness.
2. When conditions permit, a small piece of thick MDF 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 the surface of the board has a small drum package, indicating that the board surface is poor in water resistance.
3. Select thick MDF with low release. When using olfactory smell, you should choose thick MDF with less irritating taste, because the bigger the smell, the higher the formaldehyde emission and the greater the pollution.
Some studies have linked formaldehyde to cancer risk, but there are also regulations that specify the amount of formaldehyde that can be used to create MDF. When manufacturing MDF, the exhaust of chemicals occurs. The paint further reduces the likelihood of deflation in the home. You don't have to worry too much about the security of thick MDF.