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A high strength polyamide 66 multi filament with excellent heat-stability, and a process of preparing for the same
A high strength polyamide 66 multi filament with excellent heat-stability, and a process of preparing for the same
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机译:具有优异的热稳定性的高强度聚酰胺66多丝及其制备方法
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摘要
PURPOSE: Provided is a high tenacity polyamide 66 multi filament which involves excellent thermal stability and shearing strength, and is well adapted for use in manufacturing a rubber reinforcing tire cord. CONSTITUTION: A method for manufacturing the high tenacity polyamide 66 multi filament comprises the steps of: condensation-polymerizing hexamethylenediamine and adipic acid to make a polyamide 66 polymer; and melt-spinning it, followed by cooling and multi-stepped drawing. Before the condensation polymerization is completed, 0.01-0.1wt.% of a metallic stearate compound is added to 100wt.% of the hexamethylenediamine. The cooling of the melt-spun polymer is made at 270-320 deg.C by a natural cooling unit directly placed under the spinneret with a length of 250-350mm.
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