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Properties of fibre for dry filtration

Fibre Type  Cotton  Polypropylene  Polyester  Homopolyme r Acrylic Nomex   Ryton   Glass Fibre  PTFE  Nylon 
Polymetaphylene Isophtalamide (PPS)
Temperature Limit (°C)  82  90  130  130  200  190  260  260  
Water Vaporer Saturated  Condition Moist Heat °C 82  90 94 130 177 190 260 260  
Max (Short Time   94  107  150  150  240  232  290  290 
Operation Tem °C (Dry  Heat)
Specific Density 1.5  0.9  1.34  1.17  1.38  1.38  2.54  2.3
Relative Moisture Regain  in % 8.5  0.1  0.4  1  4.5  0.6  0  0
Support Combusion  Yes  Yes  Yes  Yes  No  No  No  No 
Resistance To Acid
Hydrochloric Acid N/A Good  Good  Good  N/A Good  Fair  Good  N/A
Sulfuric Acid N/A Good  Fair  Good  N/A Fair  Fair  Good  N/A
Nitric Acid N/A Good  Fair  Good  N/A Fair  Fair  Good  N/A
Chromic Acid N/A Good  Good  Good  N/A N/A Good  Good  N/A
Aqua Regia N/A Good  Fair Good  N/A N/A Good  Good  N/A
Acetic Acid  Good Good  Good  Good  Fair Good Good  Good  N/A
Formic Acid  Fair Good  Good  Good  Fair Good Good  Good  N/A
Resistance To Alkali
Aluminium Hydroxide  Fair Fair  N/A Fair Fair Good Good  Good  Fair
Sodium Hydroxide  Good  Good   N/A Fair Fair Good N/A Good  Fair
Potassium Hydroxide  Good  Fair N/A N/A Fair Good N/A Good  Fair
Fibre Type  Cotton  Polypropylene  Polyester  Homopolyme r Acrylic Nomex   Ryton   Glass Fibre  PTFE  Nylon 
Polymetaphylene Isophtalamide (PPS)
Resistance To Salt
Calcium Chloride Good  Good  Good  Good  Fair N/A  Fair  Good Not Recommended
Calcium Chloride Good  Good  Good  Good  Good Fair  Good Good
Zinc Chloride Fair  Good  Not Recommended  Fair  Fair N/A  Fair  Good Not Recommended
Resistance To Oxiding Agent
Hydrogen Peroxide  Good  Good  Fair Good  N/A N/A  Good  Good Fair
Sodium Hypochlorite  Fair Not Recommended Good  Good  Fair Fair  Not Recommended Good Fair
Chlorine  Fair  Not Recommended  Fair Fair Not Recommended  Not Recommended   Not Recommended  Good Not Recommended
Fluorine  Not Recommended Good  Fair Fair N/A N/A  Not Recommended Good Not Recommended
Resistance To Organic Solvent
Acetone  Good  Fair  Good  Good  Good Good Good Fair Good
Carbon Tetrachloride  Good  Fair  Good  Good  Good Good Good Good Good
Ethyl Alcohol  Good  Good Good  Good  Good Good Good Good Good
Methyl Ethyl Ketone  N/A Fair  Good  Good  Good N/A Good Good Good
Tri-Chloro Ethylene  Good Fair  Good  Good  Good N/A Good Good Good
Toluene  Good Not Recommended  Good  Good  Good Fair  Good Good Good
Ethylene Glycol  N/A Good Good  Good  Good N/A Good Good Good
Resistance to Mineral Oil  Good  Good Good  Good  Good Good  Good Good Good