the standard requirement for formaldehyde emission is 1.5mg/L, while the test result is ≤0.1mg/L, meeting requirement of E1 in the national standard GB18580-2001, and thus can be directly used for indoor decoration.
as it does not contain any resin bonding agent and has good environmental protection performance, it is mainly used for households and some building acoustic places with high environmental protection requirements to replace the traditional centrifugal glass wool.
Sheet type cotton 1200×600×50mm, 32kg/m3
Coiled cotton 20000×1000×30mm, 12kg/m3
applicable to all the places requiring sound absorption and noise reduction
Sound Absorption Description:
The polyester fibre sound absorption board is based on the theory of perforated material sound absorption. There are a large number of small interconnected holes inside the polyester fibre sound absorption board materials, and the sound wave can go deep inside the material through these holes, and turns the sound energy to be heat energy by means of friction with the materials. It is a type of perforated sound absorption materials. Along with the increase of frequency, the sound absorption coefficient gradually increases, which means that the absorption of low-frequency sound signals is not as good as that of high-frequency sound signals. The preconditions for sound absorption by the perforated material are as follows: there are a lot of holes in the material, the holes are interconnected, and the holes are deep into the material.