There are various dyeing methods for nylon yarn. The specific method depends on the required dyeing effect, the type of dye and the properties of fiber.
The following are several common dyeing methods for nylon yarn.
1.Pretreatment
Before dyeing, the nylon yarns need to be pre-treated to remove dirt and residual so as to ensure even dyeing effect. Generally pretreatment includes cleaning and bleaching, etc.
2.Exhaust dyeing
It is to soak the nylon yarns completely in the dye solution and achieve the desired dyeing effect by controlling the time of dyeing, dyeing temperature and concentration of dyes.
3.Exhaust dyeing is suitable for various kinds of dyes, as acid dyes, metal complex dyes, disperse dyes, reactive dyes, direct dyes, neutral dyes and indanthrene dyes, ect.
4.Jet dyeing
In this method, the dye liquid is sprayed onto the nylon yarn through a nozzle, so that the dyes can be more evenly distributed on the fiber surface. Jet dyeing has the advantages of quick dyeing speed, high utilization rate of dyes and good color fastness. It is especially suitable for mass production.
5.Yarn wrap dyeing
It is suitable for longer nylon yarns. It is to dye by winding the yarn around a warp shaft. This method can ensure that the yarns can keep a certain tension during the dyeing process, so as to avoid uneven dyeing caused by uneven tension.
Post time: Sep-25-2024