Dry Spinneret
Used in the dry spinning process, the Dry Spinneret extrudes polymer dope into a heated gas chamber, where the fiber solidifies through solvent evaporation. This dry spinning spinneret is key to producing fibers with smoother surfaces and unique pore structures, suitable for specific gas separation membranes and synthetic fibers. Its design carefully manages heat and airflow to ensure stable fiber formation.
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A sol - gel sintering spinning spinneret is a coaxial extrusion spinning assembly for inorganic/ ceramic hollow fiber membrane. The outer phase is a sol or organic–inorganic hybrid precursor, containing inorganic particles or precursor solution with organic binders/ porogens, while the inner phase is a supporting bore fluid which may be a coagulant, a nonsolvent, or an inert fluid. After shaping, the green fibers undergo gelation, solvent exchange, drying, debinding, and high temperature sintering, typically 400 - 1200°C, to yield dense or porous inorganic/ ceramic hollow fibers membrane such as alumina, zirconia, silica, titanates, and the approach is also applicable to metal/glass precursor systems.
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