Definition
A material or product is described as having a single-fiber composition when it consists exclusively of one fiber type or material category, with no admixture of other materials. A single-fiber textile is, for example, 100 percent cotton, polyester, or wool, and therefore contains no blended fibers. This property is of particular importance for material-level recycling, as blended materials can complicate or entirely preclude the recycling process.
Use in the textile industry
In the textile industry, single-fiber composition is a key prerequisite for high-quality fiber recycling, since blended fabrics often cannot be separated into their constituent raw materials, or can only be separated with considerable effort. Single-composition materials are preferably kept in closed-loop systems — for example, in the mechanical recycling of cotton or wool waste into reclaimed fibers. Single-fiber composition also simplifies processing during production, because uniform fiber properties such as tensile strength, elongation behavior, and dyeing behavior remain consistent.
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