PTFE has a low surface energy, it is difficult to dissolve in most solvents and due to relatively high melt viscosity, making it unsuitable for conventional solution spinning or melt spinning methods. Currently, the main process methods of PTFE fine powder for fiber are carrier spinning, paste extrusion, film splitting, and fibrillation, etc.
Due to unique molecular structure, PTFE exhibits excellent orientation and thermal stability, allowing for long-term use at -250-260℃ and short-term use at temperatures up to 300℃. It also tolerates temperature fluctuations and abrupt changes, without becoming brittle at low temperatures. Furthermore, it possesses hydrophobic, flame-retardant, lubricating, and anti-aging properties, making it a high-performance material widely used in fiber manufacturing processes.
The fiber made from PTFE fine powder is a high-tech fiber with important applications in cutting-edge technology, defense industry, and other aspects of the national economy.
In the aerospace field, PTFE fibers can be used to manufacture structural materials for aircraft and other spacecraft, as well as shielding for rocket launch pads. PTFE fiber fabrics can be used to make spacesuits.
In industry, due to its excellent chemical stability and low coefficient of friction, PTFE fibers are suitable for manufacturing various corrosion-resistant and high-temperature resistant sealing rolls.
PTFE fiber fabrics can be used as filter materials for corrosive gases and acid/alkali droplets at high temperatures, and as conveyor belts for corrosive substances. They are particularly suitable for handling highly viscous materials. Because PTFE fibers have good non-stick properties, the filter materials and conveying equipment are relatively easy to clean.
| No. | ITEM | UNIT | VALUE |
|---|---|---|---|
| Grade | Excellent Grade | ||
| 1 | Appearance | White powder | |
| 2 | Cleaness | Excellent Grade | |
| 3 | Bulk Density | g/l | 475±100 |
| 4 | Tensile Strength ≥ | Mpa | 24 |
| 5 | Elongation ≥ | % | 250 |
| 6 | Particle Size | um | 400-575 |
| 7 | Moisture Content≤ | % | 0.03 |
| 8 | Standard Relative Density | 2.120-2.150 | |
| 9 | Maximum Reduction Ratio | 400:1 | |
| 10 | Extrusion Pressure | Mpa | 45.0-60.0(400:1) |
| 11 | Processing Method | Paste Extrusion |
Mainly used for long fiber etc.
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