Colored polyester low-stretch yarn: How to ensure color durability during the production process

In the textile industry, colored polyester low-stretch yarn is widely used in many fields such as clothing, home decoration and industrial fabrics with its unique color charm and excellent physical properties. However, for such products, color durability is undoubtedly one of the characteristics that consumers pay most attention to.

Raw material selection and dye matching
The color durability of colored polyester low-stretch yarn depends first on the selection of raw materials and the matching of dyes. High-quality polyester raw materials are the basis for producing high-quality low-stretch yarns, which should have good spinnability and dyeing properties. In the selection of dyes, manufacturers usually tend to use disperse dyes with small molecules, weak polarity, poor solubility in water and good compatibility. This type of dye is not only easy to penetrate into the polyester fiber, but also can form a strong coloring layer on the fiber surface, thereby improving the color durability.

Advanced dyeing process
Dyeing is one of the most critical links in the production process of colored polyester low-stretch yarn. In order to ensure the durability of the color, manufacturers will adopt advanced dyeing technology. In the dyeing process, it is crucial to strictly control parameters such as temperature, time, and pH value. Too high a temperature may cause excessive diffusion of dye molecules, affecting the uniformity and fastness of the color; while too low a temperature may prevent the dye from fully penetrating into the fiber. In addition, proper dyeing time and pH adjustment are also important factors to ensure color durability.

Reduction cleaning and high temperature setting
The reduction cleaning and high temperature setting steps after dyeing are equally important for improving the color durability of colored polyester low-elastic yarn. Reduction cleaning can remove unfixed floating colors and impurities on the fiber surface and reduce fading during washing. In this step, manufacturers will select appropriate reduction cleaning agents and temperature conditions to ensure the cleaning effect while avoiding damage to the fiber. High temperature setting uses heating to form a more stable bond between dye molecules and fiber molecules, further improving color fastness. However, it should be noted that too high a setting temperature may destroy the elasticity of the fiber, so the appropriate setting temperature must be set according to the characteristics of the fiber and the requirements of the dye.

Oil finishing and post-treatment
In the production process of colored polyester low-elastic yarn, oil finishing is also one of the important means to improve color durability. Oil can increase the softness and antistatic properties of the fiber, while improving the gloss and friction properties of the fiber surface. The improvement of these properties helps to reduce the wear and fading of the fiber during subsequent processing and use. In addition, post-treatment steps such as softener treatment and UV protection treatment can also improve the color durability of colored polyester low-elastic yarn to a certain extent.

Quality control and testing
Strict quality control and testing are important guarantees to ensure the color durability of colored polyester low-elastic yarn. Manufacturers will establish a complete quality management system to strictly monitor and test every link in the production process. Through regular sampling and testing, color card comparison, color fastness evaluation, etc., ensure that the color durability of the product meets relevant standards and customer requirements.

The color durability of colored polyester low-elastic yarn is jointly guaranteed by multiple links such as raw material selection, dye matching, advanced dyeing technology, reduction cleaning and high-temperature setting, oil finishing and post-treatment, and strict quality control and testing. The implementation of these measures not only improves the color durability of the product, but also provides consumers with more high-quality and reliable textile products.