In order to solve the problems of traditional dyeing of polyamide fabric,such as high energy consumption,serious environmental pollution and low dye uptake of disperse dyes in supercritical CO2 dyeing system,water-ethanol solution is used as the entrainer to form a micro lotion system with supercritical CO2 in polyamide dyeing,which can increase the solubility of acid dyes in supercritical CO2 dyeing system.The influence of temperature,entrainer content,pressure,time and other factors on the K/S value and levelness of nylon fabric dyeing is studied.The results show that dyeing under 90～110 ℃ and 20～24 MPa for 50～70 min with 50％ethanol aqueous solution as the entrainer of 3％～5％,the polyamide fabric can achieve good dyeing results.
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