SPINNERETS FOR WET SPINNING

湿式紡糸用ノズル

 

Wet spinning is used for polymers that need to be dissolved in a solvent frist. The spinneret is immersed in tanks containing the solvent into which the flaments are extruded. Acrylic, vinyl, rayon are produced by this method.
Furthermore, Carbon Fiber can also be produced by this process. Carbon Fiber is a fibrous carbon material and can be classifed into PAN-based, pitch-based and rayon-based. Among them, PAN-based carbon fiber is in the largest production and best used in volume. PAN type carbon fiber, which makes up 90% of the total market, is produced by carbonization of PAN precursor (PAN: Polyacrylonitrile) and has high tensile strength and high elastic modulus. Actually, Carbon Fiber can be produced by both wet and dry-wet spinning methods. Wet spinning is more common. The spinneret is submerged in a chemical bath and when the filaments emerge, they precipitate from solution and solidify. In comparison with dry-wet spinning, the spinnerets used usually have more holes.

SEM photos of silt shape hole(0.28×0.028mm). The left is from entrance side and the right is from exit side.
湿式紡糸法

 

Material Stainless steel,tantalum,Gold-Platinum alloy
Number of holes 200,000,etc
Shape Round(cup),Rectangular,Ring,shaped,etc
Products Rayon,Carbon Fiber,Acrylic,Aramid,Vinylon,etc

World’s only spinneret manufacturer which is capable of re-melting GOLD-Platinum alloy Specialized in making numerous holes.



Roound hole

Diameter of hole
(Φ)
L/D
Accuracy of D
Accuracy of L
Special
Standard
Special
Standard
φ0.016~φ0.050
~1/1
±0.001
±0.002
±0.005
±0.01
φ0.050~
1/1~2/1
±0.001
±0.0015
±0.01
±0.02

Non-round hole

Width
Accuracy of Width
Accuracy of L
Special
Standard
Special
Standard
0.023~
±0.001
±0.002
±0.01
±0.02