China's industrial enterprise design hygiene standards stipulate the highest allowable concentration of cyanide in surface water and indoor air.
The maximum allowable concentration of cyanide in surface water is less than 0.05 mg / liter of domestic water; less than 0.5 mg / liter of industrial sewer discharge; less than 1 mg / liter of cyanide-containing sewage into the tailings dam. The maximum allowable concentration of cyanide in the air is not more than 0.3 mg/ m3 .
Polyester Spunbond Non-woven Fabric Production Line
PET polyester non-woven fabric equipment mainly includes: polyester filament non-woven fabric machinery, polyester staple non-woven fabric machinery. The produced non-woven fabric has the characteristics of high strength, high temperature resistance (can be used in 150 ℃ environment for a long time), aging resistance, ultraviolet resistance, high elongation, good stability and permeability, corrosion resistance, sound insulation, mothproof, non-toxic, etc. In addition, there is a very special physical property: anti gamma ray. The surface is smooth and glossy. It has excellent physical and mechanical properties in a wide temperature range. Its long-term use temperature can reach 120 ℃, and its electrical insulation is excellent. Even under high temperature and high frequency, its electrical performance is still good, but its corona resistance is poor, creep resistance, fatigue resistance, friction resistance, and dimensional stability are good.
Polyester spunbond PET filament non-woven fabric production machinery, household non-woven fabric production machinery, PET polyester environmentally friendly non-woven fabric machine
Changzhou Puyisen Machinery Technology Co., Ltd. , https://www.pysmachine.com