Keinokuituihin

Keinokuituihin is a Finnish term referring to synthetic fibers produced by chemical synthesis rather than by processing natural materials. In textile contexts, it covers polymers such as polyester (PET), polyamide (nylon), acrylic, modacrylic, elastane (spandex), and aramid fibers (for example Kevlar and Nomex), as well as blends of these materials. Regenerated cellulose fibers (viscose, modal, lyocell) are usually discussed separately as regenerated fibers, though they are sometimes included in broader discussions of synthetics.

Production of keinokuituihin involves polymerizing monomers into long chains and then extruding those chains through spinnerets to form filaments. Depending on the polymer, fibers are produced by melt spinning (thermoplastics like polyester and nylon) or by solution spinning (acrylics, aramids, spandex). The filaments are drawn to align the molecular structure, then texturized or twisted into yarns for textile applications.

Properties and uses of keinokuituihin typically include high strength, durability, chemical resistance, and versatile elasticity. They offer a range of moisture handling, warmth, and weight, making them common in apparel, home textiles, and industrial applications such as reinforcement in composites, airbags, and filtration.

Environmental considerations accompany their use: production can be energy-intensive, and synthetic fibers can contribute to microplastic pollution if released during washing. End-of-life management and recycling programs are increasingly emphasized, along with development of bio-based, recyclable, or biodegradable alternatives and circular economy approaches in the textile industry.