Under the requirements of environmental policy, let's talk about textile recycled fibers

China is the world's largest chemical fiber production and application country, in 2019, the total production of chemical fiber in China was 58.27 million tons, of which 47.51 million tons of polyester, accounting for 81.5% of the total production of chemical fiber. The problem of waste pollution accompanying the huge production is also becoming more and more serious. Therefore, the development of recycling chemical fiber is an important way for China's chemical fiber industry and even textile industry to achieve sustainable development.

1. Latest policy requirements

NDRC and other three departments: In 2025, the output of recycled fibers of waste textiles reached 2 million tons

On April 11, the National Development and Reform Commission, the Ministry of Commerce, the Ministry of Industry and Information Technology issued the "Implementation Opinions on Accelerating the recycling of waste Textiles" proposed that by 2025, the recycling system of waste textiles will be initially established, the recycling capacity will be greatly improved, and the recycling rate of waste textiles will reach 25%. The output of recycled fibers from waste textiles reached 2 million tons. By 2030, a more complete recycling system of waste textiles will be built, the awareness of recycling among producers and consumers will be significantly improved, the ways of high-value utilization will continue to expand, the level of industrial development will be significantly improved, the recycling rate of waste textiles will reach 30%, and the output of recycled fibers of waste textiles will reach 3 million tons.

In terms of promoting green and low-carbon production in the textile industry, the "Opinions" require the implementation of green textile design, encourage the use of green fibers, and strengthen the social responsibility of textile producers. In terms of improving the waste textile recycling system, the "Opinions" require improving the recycling network, expanding recycling channels, and strengthening recycling management.

Second, polyester fiber introduction

1. Polyester fiber

POLYESTER FIBERS, commonly known as "polyester". Referred to as "P" or "T", is a synthetic fiber derived from polyester polycondensation of organic dibasic acid and dibasic alcohol by spinning, referred to as PET fiber, was invented in 1941, is the first major variety of synthetic fiber.

The biggest advantage of polyester fiber is that it has good wrinkle resistance and shape retention, and has high strength and elastic resilience. It is fast and durable, wrinkle-resistant, non-ironing, and non-sticky.

Polyester has excellent setting properties. Polyester yarn or fabric after the formation of flat, fluffy shape or pleats, etc., in use after many washing, can still be durable. It is widely used in the manufacture of clothing fabrics and industrial products.

Polyester is also the simplest of the three synthetic fibers, and the price is relatively cheap. In addition, it has the characteristics of strong and durable, good elasticity, not easy to deformation, corrosion resistance, insulation, crisp, easy to wash and dry, etc., and it is loved by people.

The upstream of the polyester fiber industry is the petrochemical industry, and the downstream is the textile industry. The main operating process of the polyester fiber industry is to purchase petrochemical products PTA, MEG and other additive raw materials, carry out polycondensation reaction through corresponding production equipment, and then produce polyester filament products through the spinning, addendum and other processes, and sell the products to downstream weaving enterprises for the production of civil and industrial textiles.

2. Application of polyester fiber

Polyester has many excellent textile properties and wear properties, a wide range of uses, can be made of pure textile, but also with cotton, wool, silk, hemp and other natural fibers and other chemical fibers blended and interwoven, made into a variety of colors, fast and scrape, easy to wash and dry, ironing and washing can wear good performance of wool, cotton, silk, linen fabric.

Polyester fabric is suitable for men's and women's shirts, outerwear, children's clothing, interior decoration fabrics and carpets. Because polyester has good elasticity and fluffiness, it can also be used as wadding. In the industry, high-strength polyester can be used as tire cord, transport belt, fire hose, cable, fishing net, etc., and can also be used as electrical insulation materials, acid-resistant filter cloth and paper blankets. Non-woven fabric made of polyester can be used for interior decoration, carpet backcloth, medical industry cloth, floss, lining and so on.

Three, recycled polyester fiber

1. Classification of recycled polyester fibers

There are two main categories of regenerated fibers: regenerated cellulose fibers and regenerated synthetic fibers.

Viscose fiber is the earliest regenerated fiber, and later new regenerated cellulose fibers such as Lyocell fiber, cellulose carbamate fiber, superconducting viscose fiber, kapok fiber and bamboo fiber have appeared successively.