Terylene four-side stretch high-fastness dyeing processing technique

The invention discloses a terylene four-side stretch high-fastness dyeing processing technique and belongs to the technical field of dyeing and finishing technique. The terylene four-side stretch high-fastness dyeing processing technique is characterized by comprising the following main steps: S1, pretreating dye: adding 4.2-6.6 g/L of ethanol, 2.4-3.8 g/L of tetraethyl orthosilicate and water into a container, performing uniform stirring and then adding 0.8-1.2 g/L of coupling agent, dropwise adding an acid preparation to adjust the pH value to 4.0-5.0, adding the dye, performing stirring for4-6h at the temperature of 45-55 DEG C and at the stirring speed of 700-800 r/min, and performing aging for 36-48h to obtain dye pretreatment sol; and S2, performing dyeing: adding water and the fabric into a dyeing machine, adding the dye pretreatment sol obtained in the step S1 after 10-20min, performing heating, performing dyeing for 50-70min at the temperature of 125-133 DEG C and under the pressure of 197-295KPa, an