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Method of preserving or improving the mechanical properties of fibres made of aromatic copolyamides in alkaline media and moulds containing such fibres
Method of preserving or improving the mechanical properties of fibres made of aromatic copolyamides in alkaline media and moulds containing such fibres
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机译：在碱性介质中保持或改善由芳族共聚酰胺制成的纤维的机械性能的方法以及含有这种纤维的模具
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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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