When dyeing polyester bobbin yarn, there is always a difference between the inner and outer layers. Why does this problem occur? Let's find out why!
The color difference between the inner and outer layers is easy to occur in package dyeing, which is mainly affected by the performance of dyes, dyeing equipment and the effect of levelling agents. First, due to the poor dispersion of the dye, the dye is easy to agglomerate and cannot be well dispersed in water, which easily leads to color blooming and poor inner and outer layers. The dyeing equipment is mainly used to keep the dye bath circulating evenly and ensure that the dye can be adsorbed by the yarn evenly.
Levelling agent is mainly used to solve the problems of dispersion, retarding and migration of dyes. It can promote the uniform dispersion of dyes, slow down the dye uptake rate, and even disperse the dyes on the yarn in time. The first two problems may be difficult to change, because the performance of the dye itself determines that the equipment can not be easily replaced, so ensuring the use of a leveling agent with good performance is an effective and low-cost way to reduce color blooming. High temperature levelling agent is a kind of levelling agent with excellent retarding property, excellent dispersion and strong dye migration.
High temperature leveling agent is a kind of polyester disperse dye leveling agent with excellent retarding performance. Its main chemical component is styrene phenol polyoxyethylene ether ammonium sulfate. When the content is 1%, the pH value is usually 4 ~ 7, and the cloud point is > 100 ℃. The high-temperature levelling agent has good dispersion performance, can disperse the dye evenly in the water bath, and ensure uniform coloring.
The high-temperature levelling agent is soluble in water and general organic solvents. It has excellent dye dispersion, initial retarding and synchronous dye uptake. It can be used for high-temperature operations in textile and printing and dyeing industries, such as high-temperature dyeing and fast dyeing processes.
High temperature levelling agent has excellent dye dispersion and solubility, and can be dissolved in water and general organic solvents. It is mainly used in textile and printing and dyeing industries, and can be used as a high-temperature and high-pressure dispersion leveling agent for polyester fiber in rapid dyeing processing. It can keep high efficiency under acidic conditions and avoid processing defects caused by hydrolysis of some dyes.
The high-temperature levelling agent does not contain solvent and carrier components, which is helpful to improve the working environment. It is suitable for high-temperature dark dyeing of polyester and high-temperature light dyeing requiring warm colors. In general industry, it is used as a component of detergent.
