Coagulation bath system for fiber spinning

Patent metadata

Field	Value
Publication number	US-12378698-B2
Application number	US-202117800247-A
Country	US
Kind code	B2
Filing date	Feb 15, 2021
Priority date	Feb 18, 2020
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A coagulation bath system for fiber spinning, the system comprising a coagulation bath con figured to have coagulation liquid consisting of at least partly of water, and forming a water flow, which coagulation liquid is arranged to receive fibers, the water flow drives the movement of fibers through the coagulation bath.

First claim

The invention claimed is:

1. A coagulation bath system for fiber spinning, the coagulation bath system comprising:
a coagulation bath and a reservoir, the coagulation bath being configured to have coagulation liquid comprising water, and forming a water flow, the coagulation liquid is arranged to receive fibers,
wherein the water flow drives movement of the fibers through the coagulation bath,
wherein the coagulation bath comprises a conical part configured to narrow from an entry to an exit,
wherein the entry is upstream of a water flow direction and the exit is downstream of the water flow direction, and the coagulation bath is connected to an upward directed tube at the exit,
wherein the conical part is configured to accelerate the water flow towards the exit,
wherein the coagulation liquid is configured to be circulated between the coagulation bath and the reservoir via circulation tubing, and a filament bundle is configured to be conducted from the exit to the coagulation liquid in the reservoir,
wherein the coagulation bath further comprises an upper part having two connections for a fluid inlet and an overflow, two concentric cylinders comprising an outer cylinder and an inner cylinder in the upper part that form an annular zone between the outer cylinder and the inner cylinder thereby reducing a fluid velocity and a flow turbulence of the coagulation liquid by providing a greater area for the coagulation liquid to flow, a part of the coagulation liquid flows downward and another other part of the coagulation liquid flows through the overflow in order to maintain a constant level of the coagulation fluid inside the coagulation bath,
a middle cylindrical part,
the conical part including an exit, and
an exit tube extending from the conical part exit to an upwardly directed tube.

2. The coagulation bath system according to claim 1 , wherein a roll, which is a motorized roll, is provided at the conical tube exit for filament alignment with the exit tube, wherein the motorized roll is configured to facilitate the movement of the filament bundle towards the exit.

3. The coagulation bath system according to claim 1 , comprising a drawing godet configured to wind up the filament from the coagulation bath through the exit tube.

4. The coagulation bath system according to claim 3 , wherein rotation speed of the motorized roll is configured to correspond the rotation speed of the drawing godet.

5. The coagulation bath system according to claim 1 , wherein the coagulation bath comprises transparent lateral walls.

6. The coagulation bath system according to claim 1 , wherein the coagulation bath is water-cooled double-jacket metallic reservoir.

7. The coagulation bath system according to claim 1 , wherein the coagulation liquid is circulated between the coagulation bath and the reservoir by a pump.

8. The coagulation bath system according to claim 1 , wherein the coagulation bath comprises at least one inlet for receiving circulated coagulation liquid from the reservoir into the coagulation bath.

9. The coagulation bath system according to claim 8 , wherein the coagulation bath comprises at least two inlets for receiving the circulated coagulation liquid from the reservoir into the coagulation bath, wherein the first inlet is arranged near the entry of the coagulation bath, and a second inlet is arranged near the exit of the coagulation bath.

10. The coagulation bath system according to claim 9 , comprising plurality of rotameters configured to adjust separately the flow rate of the circulated coagulation liquid through each inlet.

11. The coagulation bath system according to claim 1 , comprising at least one rotameter configured to adjust the flow rate of the circulated coagulation liquid from the reservoir to the coagulation bath.

12. The coagulation bath system according to claim 1 , wherein the coagulation bath comprises an overflow port for maintaining a constant coagulation liquid level inside the coagulation bath.

Assignees

• Aalto Univ Foundation Sr

Inventors

• Larkiala Sauli
• Guizani Chamseddine

Classifications

• D10B2401/063

  high strength · CPC title

• D10B2201/24

  Viscose · CPC title

• D01H13/02

  Roller arrangements not otherwise provided for · CPC title

• D01H13/00

  Other common constructional features, details or accessories · CPC title

• D01D7/00

  Collecting the newly-spun products ({D01D5/0076 takes precedence;} collecting newly-spun products with the imparting of twist D01H) · CPC title