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Process for maintaining or improving the mechanical properties of fibers from aromatic copolyamides in alkaline media and use of the treated fibers for the production of moldings
Process for maintaining or improving the mechanical properties of fibers from aromatic copolyamides in alkaline media and use of the treated fibers for the production of moldings
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机译:在碱性介质中保持或改善芳族共聚酰胺纤维的机械性能的方法以及处理过的纤维在模制品生产中的用途
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摘要
The invention relates to a process for maintaining or increasing the tensile strength of fibres of aromatic copolyamides which are built up predominantly from para-monomers and are soluble in organic aprotic and polar solvents during storage in alkaline media. The process comprises the measures: a) production of fibres from said aromatic copolyamides by dry or wet spinning processes which are customary per se, b) aftertreatment of the resulting fibres in a manner which is known per se, and c) storage of the fibres in an aqueous environment which has a pH of at least 10 for at least a period of time and at a temperature such that the tensile strength of said fibres, based on the tensile strength of the fibres employed in step c), is at least retained or increased.
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