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Polypropylene fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber
Polypropylene/PP fiber, polyacrylonitrile/PAN fiber, and polyvinyl alcohol/PVA fiber are synthetic microfibers commonly used in fiber cement boards, but the three fibers have different advantages, such as polypropylene fiber has the best alkali resistance, polyacrylonitrile fiber has the best UV resistance, and polyvinyl alcohol fiber has the highest strength. For details, please refer to the table below:
| Item | PAN fiber-6mm | PP fiber-6mm | PVA fiber-6mm |
| Ordinary diameter | 12μm | 18μm | 14μm |
| Density | 1.18g/cm³ | 0.91g/cm³ | 1.28g/cm³ |
| Tensile strength | 600-720Mpa | 450-530Mpa | 1100-1450Mpa |
| Elastic modulus | 9-11Gpa | 4.5-6Gpa | 28-33Gpa |
| Number per kg | ≈1280Million | ≈750Million | ≈833Million |
| Melting point | 220-235℃ | 160-176℃ | 280-310℃ |
| UV Resistance | PAN fiber > PVA fiber >PP fiber | ||
| Alkali resistance | PP fiber> PVA fiber> PAN fiber | ||
| Acid resistance | PAN fiber >PP fiber >PVA fiber | ||
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