Silk is a natural protein fiber composed mainly of fibroin and is produced by certain insect larvae to form cocoons. Silk has a high emissivity for infrared light, making it feel cool to the touch. Even though silk has a small percentage of the global textile market, it is a multibillion-dollar trade. The unit price for raw silk is roughly twenty times that of raw cotton.


Nylon woven greige fabrics have acrylic and wax etc. added as a sizing agent to the warp. These are a secondary contaminant applied in the process before the weaving. In the pretreatment process, secondary contaminants are removed by continuous treatment.


Acid dyes and pre-metallized dyes are used in dyeing of nylon which are water-soluble and dyed by ionic bonding. In the dyeing process, various dyeing auxiliaries such as levelling agents for level dyeing, soaping agents for washing off unfixed dyes for improving dye fastness, fixing agents for fixing dyes to fibers or fabric are used.


Cationic softener is the most commonly used softener for finishing nylon fabric. Cationic softener can easily adsorb on the surface of the fiber with strong combining capacity and strong high temperature, washing resistance.