Method for dissolving aramid polymer in sulfuric acid using a double shaft kneader
AssigneeTeijin Aramid B.V.
InventorBernardus Maria Koenders
Life of this patent
Estimating the term…
Abstract
A method for dissolving an aramid polymer in sulfuric acid using a double shaft kneader, comprising the steps: dosing the polymer and the solvent into the kneader, mixing the polymer and the solvent to dissolve the polymer in the solvent for obtaining a solution, degassing the solution to obtain a spin dope, and transporting the spin dope out of the kneader, wherein the polymer is an aramid polymer and the solvent is sulfuric acid, and whereby the aramid polymer is dosed into the kneader prior to dosing the sulfuric acid into the kneader.
Claims6
A method for dissolving a polymer in a solvent using a double shaft kneader, comprising the steps:
- a) dosing the polymer and the solvent into the kneader;
- b) mixing the polymer and the solvent to dissolve the polymer in the solvent for obtaining a solution;
- c) degassing the solution to obtain a spin dope;
- d) transporting the spin dope out of the kneader, wherein the polymer is an aramid polymer and the solvent is sulfuric acid, and whereby the aramid polymer is dosed into the kneader prior to dosing the sulfuric acid into the kneader.
Dependencies are inferred from the claim text.