Polysulfonylamide (PSA)
Chemical properties: PSA is a high-performance polymer that combines sulfone (SO₂) and amide (CONH) groups, with high temperature resistance, chemical corrosion resistance, and mechanical strength.
Polysulfonylamide (PSA) Description
Polysulfone amide is a very good material for making RO membrane. Comparing with other polyamides, its outstanding feature is resistance to free chlorine and oxidation, but the flux of corresponding membrane is low. In this work, the casting solution formula and membrane making condition have been modified to suit the requirement for industrial production, and also much efford have been done on improving the flux of the membrane by chemical modification of PSA.
Polysulfonylamide (PSA) Data Sheet
| Properties Index of Polysulfonamide (PSA) Staple Fiber for Spinning | ||||
| Item | Unit | 1.5D~3D （1.67dtex~3.33dtex） | ||
| Superior Grade | First Grade | Qualified Grade | ||
| Linear Density Deviation Rate | % | ±6.0 | ±10.0 | ±15.0 |
| Length Deviation Rate | % | ±3.0 | ±4.0 | ±5.0 |
| Breaking Tenacity | cN/dtex | ≥3.2 | ≥3.0 | ≥2.8 |
| Elongation at Break | % | ≥22.0 | ≥20.0 | |
| Crimps | ea/inch | M1±3.0 | M1±5.0 | |
| Crimp Degree | % | M2±4.0 | M2±5.0 | |
| Imperfection | mg/100g | ≤10.0 | ≤15.0 | ≤20.0 |
| Over-length Fiber Ratio | % | ≤0.3 | ≤0.6 | ≤1.0 |
| Double-length Fiber | mg/100g | ≤7.0 | ≤14.0 | ≤20.0 |
| Tenacity Retention After Heat Resistance (250℃ × 60min) | % | ≥95.0 | ||
| Dry Heat Shrinkage (300℃ × 15min) | % | ≤2.0 | ||
| M1 and M2 shall be determined through negotiation between the supplier and the buyer, and shall not be arbitrarily changed after confirmation. |
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| Performance Specifications of Polysulfonamide (PSA) Staple Fiber for Nonwovens | |||||||
| Item | Unit | 1.5D~3D（1.67dtex~3.33dtex） | 3D~6D（3.33dtex~6.67dtex） | ||||
| Superior Grade | First Grade | Qualified Grade | Superior Grade | First Grade | Qualified Grade | ||
| Linear Density Deviation Rate | % | ±6.0 | ±10.0 | ±15.0 | ±8.0 | ±12.0 | ±20.0 |
| Breaking Tenacity | cN/dtex | ≥3.2 | ≥3.0 | ≥2.8 | ≥2.6 | ≥2.4 | ≥2.2 |
| Elongation at Break | % | ≥22.0 | ≥20.0 | ≥22.0 | ≥20.0 | ||
| Crimp Number | ea/inch | M1±3.0 | M1±5.0 | M1±3.0 | M1±5.0 | ||
| Crimp Degree | % | M2±4.0 | M2±5.0 | M2±4.0 | M2±5.0 | ||
| Tenacity Retention after Heat Resistance (250℃ × 60 min) | % | ≥95.0 | |||||
| Dry Heat Shrinkage (300℃ × 15 min) | % | ≤2.0 | |||||
| M1 and M2 shall be determined through negotiation between the supplier and the buyer, and shall not be arbitrarily changed after confirmation. |
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Common applications
Used for filtration membranes (such as water treatment, gas separation), medical equipment, electronic insulation materials, etc.
