500GSM Aramid non woven filter cloth To asphalt metal cement steel
Aramid needle felt has good temperature resistance, flame
retardancy and chemical properties, and can work continuously at
204 ° C: wear resistance, folding resistance, acid resistance, and
can withstand repeated fluctuations of 250 ° C After baking at a
temperature of 250 ° C for 24 hours, the heat shrinkage rate was
only 0.9%. The limiting oxygen index (LOI) is 30. Only when the
temperature reaches 400 °C, there will be signs of decomposition
and carbonization. If it is impregnated with PTFE, it has a very
high acidity and alkalinity, and most hydrocarbons will not The
effect is that even if there is a small amount of fluoride, there
will be no obvious corrosion. When the smoke in the gas contains
large moisture or oil and hygroscopicity and deliquescence, and the
dew point temperature is less than 70 °C, the aramid dust filter
bag can be waterproofed and oil-repellent, and the PTFE film can be
treated to prevent condensation or discharge. High concentration
working environment.
Application:
Aramid needle-punched felt filter bags are widely used in asphalt
mixing in road construction industry. They are also suitable for
dust removal and purification in iron and steel, cement,
non-ferrous metals, powder metallurgy, drying, mine gravel, gypsum,
plastics, carbon black, coke, tobacco, welding dust removal, office
cleaning strips, washing equipment ironing blankets, conveying
blankets and other industries.
Specification:
| Material | aramide fiber+aramide base cloth | aramide+fiberglass cloth |
| Weight (g/m2) | 450 | 500 | 550 | 600 |
| Thickness (mm) | 2.1±10% | 2.2±10% | 2.3±10% | 2.6±10% |
| Air permeability (m3/m2·min) | 14±20% | 13±20% | 12±20% | 12±20% |
| Fracture strength | Meridional direction | ＞750 | ＞760 | ＞770 | ＞1800 |
| (N/520cm) | Zonal direction | ＞1100 | ＞1130 | ＞1150 | ＞1800 |
| Fracture elongation | Meridional direction | ≤20 | ≤20 | ≤20 | ≤10 |
| (％) | Zonal direction | ≤40 | ≤40 | ≤40 | ≤10 |
| operating temperature (℃) | Continuous | ≤200 | ≤200 | ≤200 | ≤210 |
| Short-term | ≤240 | ≤240 | ≤240 | ≤260 |
| Chemical resistance | Acid resistance | good | Alkali resistance | moderate |
| Oxidation resistance | good | hydrolytic resistance | bad |
| Post-processing mode | ■ Singeing ■ pressing □ water repellent and oil proof □film
covering □Antistatic □Foam coating |
| □Acid alkali emulsion impregnation |
