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Dust Filter Bag with PTFE membrane(PTFE Coated Felt)
Product Item: Membrane Needle Punched Felt (PTFE Coated Felt) 
Product Introduction: Membrane makes the felt obtain the properties of membrane material, at  the same time felt keeps the original properties. . Generally, we use polytetrafluoroethylene  (PTFE) for membrane. Its surface is smooth with high air permeability, and it is waterproof. Its  chemical properties are stable. It can nearly retain all the particles in the dust gas, furthermore,   it can guarantee the larges air flow rate but not increase the running resistance.
 
Property Index:
  a.Polypropylene membrane needle punched felt
  Make the Polypropylene felt obtain higher working temperature, smoother surface. This can  make the cakes removal easier, and increase the filtration precise without change of large air  permeability.
Material Polypropylene+PTFE coated
Weight (g/m2) 500
Thickness (mm) 1.9
Air permeability (m3/m2/min) ≥12
Breaking strength(N/5*20cm) Warp ≥1000
Weft ≥1000
Elongation(%) Warp ≤35
Weft ≤40
tenacity ( Mpa/min) 2.55
Constant working temperature (℃) 110
Instant working temperature (℃) 150
Acid resistant excellent
Alkali resistant excellent
Abrasion resistant excellent
Hydrolyze stability excellent
Finishing Singed, calendering
Material  Polyester +Polypropylene+PTFE coated
Weight (g/m2) 500
Thickness (mm) 1.90
Air permeability (m3/m2/min) 13
Breaking strength(N/5*20cm) Warp ≥1000
Weft ≥1100
Elongation() 经向 ≤35
纬向 ≤40
Constant working temperature (℃ 130
Instant working temperature (℃) 150
Finishing Singed, calendering ,PTFE coated
Acid resistant excellent
Alkali resistant good
Alkali resistant excellent
Hydrolyze stability good