Process for determining the polymer concentration in a spinning dope solution
AssigneeTeijin Twaron GmbH
InventorsWillem G. Haanstra, Hendrikus J. M. Busschers, Hans Lammers
Life of this patent
Estimating the term…
Abstract
A process for determining the polymer concentration in a spinning dope solution involves measuring the propagation velocity of ultrasonic sound in the solution. The process prevents fluctuations in the polymer concentration as much as possible, and is therefore highly suitable for application in the production of fibers with consistent properties. An ultrasonic device used in the process is easier to clean, install, and calibrate than other presently commercially available devices.
Claims8
A process of forming fibers having consistent properties from a spinning dope solution having a desired polymer concentration, comprising
- determining a polymer concentration of a spinning dope solution by measuring a propagation velocity of ultrasonic sound in the spinning dope solution,
- wherein if the determined polymer concentration differs from the desired polymer concentration for the spinning dope solution, correcting the polymer concentration of the spinning dope solution to correspond to the desired polymer concentration, and
- extruding the spinning dope solution having the desired polymer concentration through a spinneret to form the fibers.
Dependencies are inferred from the claim text.