| 摘要 |
A filtration system for filtering dope of a solvent-spun fiber manufacturing plant in which dope to be spun flows from a source of supply (10) through a series of filter assemblies (15) (21) (23) to jets (22(b)) of each spinning heads (22). The filtration system comprises, in flow series, a first stage filter assemblies (15) having filter elements with the finest pore size of the series (typically 20 mu ) and a final stage filter assembly (23), immediately upstream of the jets (22(b)) of each spinning head (22). The final stage filter assembly is of the coarsest pore size of the series of filters (typically 80 mu ) and is equal to, or less than, the size of the jet holes (typically 80 mu ). The filter media of intermediate filter assemblies (21) between the first (15) and final (23) stages increase in pore size as one progresses from the first filter assembly (15) to the final filter assemblies (23) along the flow path. |
