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Polypropylene needle felt in addition to some advantages of conventional needler felt, compared with polyester fiber, polypropylene has more excellent resistance to acid and alkali and low softening point, the polypropylene needle felt is generally used in the flue gas temperature is below 100 DEG C and acid, acid, alkalinity occasions or higher than the liquid solid separation field.
| Material | PP fiber/PP scrim | |
| Weight(g/㎡) | 500 | |
| Thickness(mm) | 2.0 | |
| Air permeability(m³/㎡/min) | 8 | |
| Tensile Strength(N/5cm) | warp | >1200 |
| Tensile Strength(N/5cm) | weft | >1400 |
| Elongation at break(%) | warp | ≤30 |
| Elongation at break(%) | weft | ≤50 |
| Dry shrinkage at 90℃ within 90 min. | warp | <1.0% |
| Dry shrinkage at 90℃ within 90 min. | weft | <1.0% |
| Working Temperature | 90℃ | |
| Peak Temperature | 110℃ | |
| Finishing Treatment | Heat setting,Singed | |
| Note | The parameters above come from ideal lab-condition, the performance will change a little bit in-linewith actual application. | |