DRY-WET SPINNING DEVICE AND METHOD FOR MANUFACTURING SYNTHETIC FIBER

摘要

There is provided a dry-wet spinning device for an acrylic precursor fiber bundle for manufacturing carbon fibers, the device enabling stable spinning by making the coagulability of spun yarn (2) uniform by suppressing the vibration of the coagulating liquid surface to make the spun yarn (2) spun downward from a spinneret (1) without the liquid surface being in contact with the spinning surface of the spinneret less susceptible to an accompanying flow reflected by the bottom surface of a spinning bath. To this end, in the present invention, a horizontal flow straightening plate (8) produced from a porous plate or a plate material extending in the direction approximately perpendicular to the direction in which the spun yarn (2) is spun is disposed in a coagulation bath so as to surround the circumference of the yarn spun downward from the spinneret (1). Further, a vertical flow straightening plate (9) extending vertically across part or all of the outer periphery of the horizontal flow straightening plate (8) can be provided.

主权项

1. A method for manufacturing a synthetic fiber, the method comprising:
spinning a synthetic fiber while, when stock solution for spinning is spun downward from a spinneret and discharged to a vapor phase part for forming fibers, which are then coagulated by introduction to a coagulation bath, a reflecting flow moving in an upward direction is blocked by a horizontal flow straightening plate as an accompanying flow accompanying running of a spun yarn in a downward direction is reflected by a bottom surface of the coagulation bath, wherein the horizontal flow straightening plate includes a single piece or plural pieces of plates, has an opening part for passing the yarn at the center, and is disposed in a range of 50% or more of the circumference of the yarn spun downward from the spinneret, the opening part is connected to an outside of the horizontal flow straightening part by forming a connecting part on the horizontal flow straightening plate, and each of the openings formed by the connecting part is in a range of 20% or less of the outer periphery of the opening part.