What Is Recycled Polyester Yarn?

What is recycled polyester yarn?

Repreve polyester yarn is the repeated recycling of a large number of waste plastic products produced by people's daily consumption. It can get rid of the excessive dependence on oil resources, reduce carbon dioxide emissions, and play a good role in protecting the environment and reducing pollution. Energy saving effect. Resource recovery and recycling are currently very common methods used to reduce carbon emissions. Among them, plastic bottles (plastic bottles) are recycled and made into recycled polyester fibers, which are being widely used in textiles. 

Recycling plastic bottles (plastic bottles) with a capacity of 1 liter can reduce carbon dioxide emissions by 0.042 kg, and every 20 plastic bottles (plastic bottles) recycled can be processed into a summer T-shirt . Recycled polyester dyed yarn fabric saves nearly 80% of energy compared with conventional production of polyester fabric, which can greatly reduce the use of petroleum. Data shows that per ton of recycled polyester yarn can save 1 ton of petroleum and 6 tons of water. Therefore, the use of recycled polyester fabrics is of great significance to the sustainable development plan of low-carbon emission reduction advocated by the world.

Characteristics of recycled polyester

Recycled polyester fibers with good quality are produced through special polymerization spinning technology, which can realize the diversity of polymers under the premise of ensuring the same quality as virgin polyester, and can be made into high F number, fine denier, special shaped cross-section, etc. A variety of high-performance fibers. For example, the special-shaped yarn WAVERON, whose unique flat cross-section can be made into a new material with anti-UV, windproof and water-resistant properties; the triangular special-shaped fat and thin yarn CORTICO, whose fine holes on the surface of the yarn can diffuse light and apply it to the fabric. Not only can it have the natural appearance of linen, but also has the physical properties of cotton; the special-shaped yarn CALCULO, with a highly profiled cross-section, is in the shape of a cross spiral, and can be made into a lightweight and dry fabric that absorbs sweat and quickly dries.

At present, the consumption of fiber textiles and plastic beverage bottles in the world is very high. The recycling of waste textiles can not only reduce environmental pollution, but also turn waste into treasure.

Regenerated nylon fiber is also called nylon recycled material, which is generally produced by smelting and granulating nylon yarn, nylon silk or nylon cloth. It has good wear resistance, heat resistance, oil resistance and chemical resistance, and greatly reduces the raw material Excellent water absorption and shrinkage, excellent dimensional stability and excellent mechanical strength.

Production process of recycled polyester yarn

There are generally two methods for manufacturing recycled fibers, one is called physical recycling production method, and the other is called chemical recycling production method.

The physical recycling production method refers to the reprocessing process of waste polyester. Recycled materials such as bottle materials and polyester waste silk are crushed, melted, purified or modified and granulated to directly spin to produce short fibers. The mechanical properties of the products are poor, and some are difficult to achieve. Textile standard, generally used for filling or industrial purposes, but this method is relatively simple to produce and low in cost.

The chemical recycling production method refers to the use of the reversibility of the condensation process of polyester polycondensates to depolymerize the recycled polyester into smaller molecules, intermediates or directly into monomers through chemical methods, and then polycondensate into high-quality products. Fiber-grade polyester chips are used for spinning. This method has high process requirements and is mostly used for high-value polymer materials. It uses the raw material value of waste textiles and can realize complete recycling. The main method is methanol dissolution method , ethylene glycol alcoholysis, hydrolysis and supercritical depolymerization.

Although the chemical method is completely recyclable and of high quality, it can replace virgin polyester in an all-round way, but due to the limitations of its short-term economic benefits, raw material supply and processing technology, the development speed of the chemical method is still relatively slow. Currently, Sinrylion recycled Polyester yarn manufacturers use physical methods to recycle PET bottle flakes.