| 摘要 |
<p>A filter core and a preparation method thereof are disclosed. The filter core has a cylindrical shape and comprises, from the inside to outside in its radial direction, an inner refined filtering fiber layer (1), an adsorption fiber layer (2), a middle fine filtering fiber layer (3), a structural fiber layer (4) and an outer rough filtering fiber layer (5). The filter pore sizes of the inner refined filtering fiber layer (1), the middle fine filtering fiber layer (3), and the outer rough filtering fiber layer (5) are gradually increased from the inside to outside in the radial direction. The filter core has wide applicable range, high filtering precision and long service life, and can be recycled.</p> |
