| 摘要 |
PURPOSE: To provide a method for producing polyvinyl alcohol (PVA)-based yarn having high tenacity and high hot water resistance suitable for industrial materials, especially belts. CONSTITUTION: PVA is dissolved in an organic solvent to prepare a spinning dope, which is subjected to dry spinning in a coagulating bath to give coagulated yarn. The coagulated yarn is provided with a finishing oil mixed with a catalyst for promoting dehydration reaction and drawn in dry heat to produce PVA- based yarn having high tenacity and high hot water resistance. In the operation, an oil consisting essentially of three components A, B and C as shown below is used as the finishing oil. The component A is 5-30wt.% of an ester of an aliphatic alcohol and an aliphatic carboxylic acid or an adduct of it and ethylene oxide and/or propylene oxide. The component B is 20-80wt.% of an adduct of an aliphatic alcohol with ethylene oxide and/or propylene oxide. The component C is 10-50wt.% of an adduct of an aliphatic amine with ethylene oxide and/or propylene oxide. |
