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Polyester needle felt dust filter bag
Polyester Filter Felt
Product Item: Polyester Filter Felt for Normal Working Temperature 
Product Intorduction:
  Our polyester needle punched felt has the following characters: 
  1.High tenacity and low elongation polyester yarn for scrim material, which enhances the  breaking strength 
  2.Fine fiber: makes the felt more apertures with smaller opening to improve the filtration  precise. 
  3.High quality polyester fiber: improves acid proof, alkali proof, and hydrolysis proof ability. 
  4.Smoother surface: makes the filtration efficiency similar with membrane felt. 
  5.Small running resistance: saves energy.
Material Polyester  
Weight (g/m2) 500
Thickness (mm) 1.80
Air permeability(m3/m2/min) 15
Breaking strength(N/5*20cm) Warp ≥1000
Weft ≥1100
Elongation (%) Warp ≤35
Weft ≤40
Constant working temperature (℃) 130
Instant working temperature(℃) 150
Finishing  Singed, calendering
Surface electric-resistance (Ω) < 10E5
Volume electric-resistant (Ω) < 10E5
Friction voltage(V ) < 500
Surface density (μC/m2) < 7
Half life (S) < 1
Acid resistant common
Alkali resistant inferior
Abrasion resistant excellent
Hydrolyze stability inferior