PET Solid State Polymerization Enables Polyester Fiber Cycle

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One such breakthrough is polyethylene terephthalatePET Solid State Polymerization Enables Polyester Fiber Cycle. Through anhydrous solid-state polymerization, used PET fibers can be decolorized without compromising their durability. This innovative technology opens up new avenues for recycling used textiles, transforming them into new thread and dyeing materials, thus boosting the development of the used clothing recovery industry.

PET Solid State Polymerization Enables Polyester Fiber Cycle


PET Solid State Polymerization Enables the Polyester Fiber Cycle

Polyester fiber, as a representative of synthetic fibers, is widely used in textile, packaging, automotive, and other industries due to its excellent physicochemical properties. However, the recovery and reuse of used polyester fibers have been facing challenges from chemicals, including high film and poor degradation performance of traditional polymerization methods, as well as difficulties in decoloration. The anhydrous polymer decolorization method has emerged to allow the recycling of waste fiber polyester.

  • Solid state polymerization: anhydrous solid state polymerization decolorization method at room temperature and pressure, using catalysts directly in the polyester fiber solid state under the action of the polymerization reaction, significantly reduces the ink.
  • Durability enhancement: A solid-state polymerization reaction enhances the intermolecular chain force of polyester fibers, enhancing its mechanical strength, temperature resistance, chemical resistance, and other properties to extend its service life.
  • Decolorization and regeneration: The technology combines an anhydrous decolorizing agent to achieve decolorization during solid-state polymerization, eliminating regeneration and dyeing in the waste polyester fibers, making the regenerated polyester fibers look new and have excellent dyeability.

The used polyester fibers are regenerated through the anhydrous SSD polymerization decolorization method, improving their performance. In contrast, decolorization is achieved, thus breaking the technical barriers to traditional recovery and reuse, providing a new solution for the circular economy, and empowering the sustainable development of polyester fibers.


Decolorization by polymerization of anhydrous polymers: a journey to the regeneration of polyester fibers

The anhydrous polymer polymerization decolorization method is an innovative technology that has revolutionized the recycling and reuse of used polyester fibers. Unlike traditional aqueous decolorization methods, the procedure is performed under anhydrous conditions, significantly improving decolorization efficiency and reducing environmental impact.

  1. Anhydrous decolorization: decolorization performed under anhydrous conditions improves efficiency and reduces environmental impact.
  2. Enhanced Strength: Effective reinforcement of blunders in polyester fibers, such as dyes, additives, and blunders.
  3. Enhanced Durability: The polymerization process enhances the durability of blunders in polyester fibers, producing more excellent resistance to abrasion and chemical degradation.
  4. Closed Loop Recycling: Recycled fibers can be recycled and re-formed into new yarns and dyed for closed-loop recycling.

The unique advantage of this technology is its environmental friendliness. No water is required, reducing water pollution and saving valuable water resources. In addition, the process consumes large amounts of chemicals, minimizing the negative impact on the environment and human health.


PET Polymers: A Breakthrough in Recycled Polyester Fiber

PET (polyethylene terephthalate) solid-state polymerization technology opens up an innovation in recycling used polyester fibers. The remarkable feature of this anhydrous decolorization method is that it can be done without using solvents or additives. This breakthrough technology further empowers the polyester fiber recycling system and gives life to the used polyester fibers.

PET solid state polymerization process, which involves the following steps:

  1. Crushing: waste polyester fibers are crushed into small particles.
  2. Curing: In an anhydrous environment, the crushed particles are heated and cured.
  3. Polymerization: During the curing process, the polyester molecules in the particles undergo chain segment movement to form new polyester bonding to improve the strength of the polyester fiber and start.
  4. Decolorization: polymerization reaction simultaneously so that a small number of waste fibers and dye in large quantities achieve the new fiber white.
  5. Pelletizing: the fibers, after polymerization, are cut and made into spinnable particles.

PET polyester fiber polymerization technology not only realizes the regeneration of waste polyester fiber but also enhances its physical properties. Through polyester polymerization, the strength of the fibers is thus increased, giving the regenerated fibers important qualities similar to those of the original polyester fibers. At the same time, the anhydrous decolorization process increases the dyeing agent and comes with a fiber-white destructive dyeing, which provides an ideal processing for the subsequent dyeing process.

PET Polymers: A Breakthrough in Recycled Polyester Fiber

CrushingCrush waste polyester fiber into small pellets.
CuringThe crushed pellets are heated and cured in an anhydrous environment.
PolymerizationDuring the curing process, the polyester molecules in the particles undergo chain segment movement to form new polyester bonding, improving the strength and stability of the polyester fiber.
DecolorizationThe polymerization reaction is accompanied by decolorization, eliminating the small amount of waste fiber and the amount of dye used and achieving a white as new fiber.
GranulationThe polymerized fibers are cut and made into spinnable pellets.


PET Polymers: Giving Polyester Fiber a New Life

The key to regenerating used polyester fibers is to increase their polymerization to make them perform as durable as new fibers. Anhydrous polymer decolorization technology broke the limitation of the traditional methanol method, using a catalyst to promote the rearrangement of molecular chains in the waste polyester fiber fibers under average temperature and pressure, forming an earlier structure.

This technology’s uniqueness lies in the lack of solvent or hydrolysis, and the polymerization reaction is carried out in an anhydrous state. Under the catalyst’s action, the used fibers’ molecular chains are broken and reconnected in the solid state to form polyester molecules with a high degree of polymerization. In this way, the fiber improves its strength and retains its original properties, such as moisture-wicking and heat resistance.

We can give new life to used polyester fibers through anhydrous solid-state polymerization. The polymerized fibers match or exceed the strength and durability of virgin polyester fibers. At the same time, this technology also has the advantages of being economical and environmentally sustainable without consuming large amounts of energy or producing wastewater, significantly reducing resource consumption and environmental pollution.

After the waste polyester fiber is decolorized by anhydrous solid-state polymerization, it can be recycled into new yarns and dyed. These recycled yarns and dyed yarns are not only of high quality but also carry the concept of sustainable environmental protection. Recycled polyester fibers can be used in various applications, from apparel and home decorations to industrial products, writing a new chapter in recycling resources.

Through the power of PET solid-state polymerization, used polyester fibers are reborn, increasing their value and contributing to sustainable development. This technological innovation and breakthrough has revolutionized the waste textile recycling industry, bringing it to a new milestone in the circular economy.



Anhydrous solid-state polymerization for color removal has revolutionized the recycling of used polyester fibers. By solid-state polymerization in an anhydrous state, we can enhance the durability of polyester fibers and achieve color removal simultaneously. This innovative technology not only promotes the recycling of used clothes but also enables the recycling of polyester fibers into new yarns and dyeing, opening a new chapter of sustainable development for the textile industry.

The emergence of PET solid-state polymerization technology marks the arrival of the era of recycled polyester fiber. It solves the environmental burden caused by waste textile products and provides new possibilities for the sustainable use of resources. Empowered by anhydrous solid-state polymerization, polyester fiber has been reborn and has become a shining star in the textile industry.

PET solid-state polymerization technology will continue to play an important role. It will not only promote the vigorous development of the waste textile recycling industry but also lay a solid foundation for the sustainable development of the textile industry. Let’s embrace this innovative technology and work together towards a more sustainable and environmentally friendly textile future.



What is PET Solid State Polymerization?

  • PET solid-state polymerization is an innovative technology that improves the durability and color removal of used polyester fibers without needing solvents or water so they can be recycled into new yarns and dyed with reduced environmental impact.

What are the benefits of anhydrous solid-state polymerization for color removal?

  1. Improve the durability of polyester fiber and extend its service life.
  2. Remove impurities and pigments in the waste fabrics to realize effective decolorization.
  3. Reduce the dependence on solvents and water resources in production, realizing environmentally sustainable development.

How does PET solid-state polymerization empower the reuse of used polyester fibers?

  • The PET solid-state polymerization concept gives new life to waste polyester fibers, enhancing their quality through anhydrous decolorization technology and giving them the possibility of recycling. This innovative approach transforms waste fibers into valuable resources and helps the textile industry achieve its goal of sustainable operation.
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