The technological pathways of old clothing recycling have expanded from simple sorting and resale to two routes: physical regeneration and chemical depolymerization. Outputs include recycled cotton fibers, automotive soundproofing cotton, building insulation materials, and recycled polyester chips that can be used to make new textile garments.

Key points:

  • The physical method crushes and opens pure cotton old clothes to produce recycled cotton fibers, used for eco-friendly bags and insulation materials
  • The chemical method targets polyester fiber garments, producing polyester chips through depolymerization and repolymerization, with performance comparable to virgin materials
  • According to data from this recycling platform, every 1 kilogram of old clothes recycled can reduce about 3.6 kilograms of carbon emissions and save 6,000 liters of water

The role of old clothing recycling manufacturers is changing. In the past, people understood old clothing recycling as the circulation and trading of secondhand garments. Today, professional recycling enterprises increasingly appear as technical processors: they divert collected used clothing by material type, then send them respectively into physical or chemical processing stages, ultimately producing industrial raw materials rather than simply secondhand goods.

On the physical method route, the processing target is mainly pure cotton old clothes. Technically, they are first crushed and then opened to obtain recycled cotton fibers, with downstream uses pointing to eco-friendly bags, insulation materials, and similar products. The characteristic of this route is a relatively simple process, and its outputs are mostly used in scenarios with low requirements for fiber length.

The chemical method targets polyester fiber garments. Through depolymerization and repolymerization, waste polyester is reduced back into polyester chips, which are said to have performance comparable to virgin products. The platform cooperates with research institutions to achieve chemical recycling of waste polyester garments, and the recycled polyester produced can be used to manufacture new textile garments, thereby forming a closed-loop cycle of "garment to garment."

The application scenarios of these recycled materials are not limited to textiles. According to the platform, products transformed from recycled old clothes include automotive soundproofing cotton, building insulation materials, eco-friendly shopping bags, and industrial wiping cloths. Its value proposition has two points: first, reducing dependence on virgin resources; second, lowering overall carbon emissions.

From an industry perspective, the parallel development of physical and chemical methods means that the output structure of old clothing recycling is shifting from "fabrics" to "materials." Sorting precision, material identification capability, and the scaled cost of chemical depolymerization will determine how much textile waste that would otherwise be downgraded or discarded these factories can absorb. For export-oriented old clothing traders, the flow of low-value, damaged, and unwearable stock may also gain an additional channel into industrial raw materials.

Source: Environmental Technology Empowerment: The New Material Revolution of Professional Old Clothing Recycling Manufacturers · Originally published on 2026-03-19