Structure and material of spinnerets for wet spinning and their performance
The structure,material and performance of spinnerets for wet spinning were reviewed.The spinnerets for wet spin-ning are mainly cap shaped,with 0.05-0.12 mm conical and circular holes in diameter.The spinnerets materials are mainly gold,platinum,rhodium,tantalum,etc.,among which gold platinum alloy spinnerets have good corrosion resistance,high strength and hardness and good spinning quality,but the price is high;tantalum spinnerets are inexpensive,but have low hard-ness,short service life and poor spinnability.Composite lithium tantalate coated tantalum spinnerets and diamond coated tantalum spinnerets,which have undergone surface nitriding treatment and coating on tantalum spinnerets,have achieved the substitution of gold platinum alloy spinnerets without reducing spinning quality and have been widely used in wet spinning.However,coated tantalum spinnerets still cannot replace gold platinum rhodium alloy spinnerets in some special fiber and high-end fiber fields.The future research development direction of spinnerets for wet spinning should be focused on low cost and high hardness and cor-rosion resistance.
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