Introduction
Polypropylene needle felt is made of PP staple fiber by needling craft and forming membrane on surface. Three-dimensional structure attaches good porosity and air-permeability to the product. It can be applied in varied conditions by regulating needling density and surface treatment. It is widely used in such industry of different areas as gold, coal washing, cement, paper making, coal selection and environment protection etc.
material | pp | pp | |
Weigth g/m2 | 500~600 | 700~1000 | |
thickness mm | 2.0 | 2.2 | |
air permeability L/m2.s | 100~200 | 100~200 | |
N/ 5*20cm breaking strength | warp | >1000 | >1200 |
weft | >1500 | >1800 | |
breaking elongation(%) | warp | <25 | <35 |
weft | <55 | <55 | |
Continuous working temperature (°C) | ≤90 | ≤90 | |
Continuous working temperature (°C) | 100 | 100 | |
acid resistance | excellent | excellent | |
alkali resistance | excellent | excellent | |
abrasion resistance | excellent | excellent | |
hydrolytic stability | excellent | excellent | |
finishs treatment | singeing, calendering | singeing, calendering | |
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