Production and application status and prospects of PA 66 chip for civil fiber
The production and application status of nylon 66(PA 66)chip for civil fiber were reviewed.And the technical dif-ficulties in producing PA 66 chip for civil fiber were emphatically described.The production capacity of PA 66 chips was 894 kt/a at the end of 2023,of which the civil fiber grade production capacity accounted for about 9%.It was expected that with the acceleration of adiponitrile localization,there will be a wave of PA 66 chip production expansion in the future.Compared with en-gineering plastic grade PA 66 chips,civil grade PA 66 chips were more difficult to be produced due to the higher requirements on relative molecular mass,water content,gel content,dyeing property.The downstream civil filament of PA 66 chip has splendid application prospects in the fields of high-end underwear,seamless clothing,high-end yoga clothes,high-end outdoor sports wear,etc..It was pointed out that the future development of civil PA 66 filament should be focused on improving the quality of civil PA 66 chips,the yield rate of filament,the dyeing rate and uniformity.
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