Recycled polyester yarns electrostatic winding and its solution

Recycled polyester yarns are made of recycled materials such as old polyester bottle pieces, spinning waste, bubble material, etc., which are crushed, cleaned, mixed and re-granulated. Due to the big difference in the source of raw materials, the fiber fineness is uneven, the mass specific resistance, the super long fiber content, the defect content, the oil content, the color absorption rate, the physical indexes such as the pitch are very different, and the stability and consistency between the package and the batch are very different. In the process of spinning recycled polyester yarn, there is a typical quality problems: the phenomenon of electrostatic winding, this article will refer to this problem, let's learn about it.

Here is the content:

• International Status of recycled yarn

• Recycled polyester yarn’s electrostatic winding and its solution

International Status of recycled yarn

There are few countries to accept recycled yarn, and the market is limited. The sudden rise of recycled yarn mainly comes from the European market. As the consumption of clothing in the EU is increasing year by year, the service life of a single piece of clothing is greatly reduced, resulting in a lot of textile waste and pollution. In France, for example, the average per capita clothing is increased by 9.5 kilograms every year, but by 2017, the recycling rate is only about 36%, and the recycling rate of textile yarn in the whole EU is even lower, only about 20%. To this end, the EU government ordered that textile waste be banned, and asked member States to start special textile recycling from 2025 to improve the recycling rate of textile yarn. At present, the vast majority of orders for recycled yarn on the market come from EU member States, or the final garments are sold to the EU. At present, other countries and regions have not issued corresponding policies to force the use of recycled yarn. In other words, recycled yarn are limited to the EU market in the short term.

Recycled polyester yarn’s electrostatic winding and its solution

In the production process of recycled polyester yarn, static electricity will affect the quality of products and even the dyeing and finishing process. The general electrostatic phenomenon is a phenomenon caused by the complex interleaving of charge generation process (charge movement and separation) and disappearance process (corona discharge and electrostatic leakage). When these two opposite processes reach equilibrium, it is the actual electrostatic charge level.

The antistatic mechanism and methods of recycled polyester yarn can be summarized as follows: reducing the generation of charges, accelerating the leakage of charges, and neutralizing the generated electrostatic charges. The reasons caused by static electricity, the anti-static mechanism and influencing factors of recycled polyester yarn, and the anti-static methods of recycled polyester yarn mainly include the following methods:

1. adding antistatic agent in the finishing process after recycled polyester yarn is made.

2. blending, copolymerization or graft modification of fiber-forming polymers.

3. Blending or embedding antistatic yarn

4. coating method

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