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What are the components of composite spun fibers

source：www.kingcharmgroup.com | Release time：2025-11-25

The core component of composite spun fibers is two or more polymers (resins) with different properties. In some scenarios, a small amount of functional additives may be added, which are fused through composite spinning technology to achieve complementary properties.
Basic polymers, as the main component, account for over 90% and are mainly divided into two categories: synthetic polymers and natural/recycled polymers. Synthetic polymers are the mainstream choice, including polyesters (PET, PTT, PBT, with high strength, wear resistance, wrinkle resistance or high elasticity), polyamides (nylon 6, nylon 66, soft and elastic), polypropylene (PP, lightweight and hydrophobic), elastomers (TPU, TPEE, high rebound and fatigue resistance), polytetrafluoroethylene (PTFE, high temperature and corrosion resistance), etc. They are often paired with a "complementary performance" logic. For example, PET and PA combination can balance wear resistance and softness, while PET and PTT combination can achieve stiffness and high rebound. Natural/recycled polymers are used as auxiliary ingredients, accounting for 20% -50%, including regenerated cellulose such as viscose, Tencel, Modal (to improve moisture absorption, breathability, and skin friendliness), natural protein such as soy protein (to enhance skin friendliness), and regenerated polyester (rPET, adapted to environmental protection needs), to improve the user experience of synthetic fibers.
Functional additives are auxiliary components, usually accounting for ≤ 5%, used to enhance specific functions. Common types include antibacterial agents such as silver ions and nano zinc oxide, flame retardants such as bromine and phosphorus, anti-static agents such as polyether ester amides, moisture wicking agents such as polyethylene glycol derivatives, thermal insulation agents such as far-infrared ceramic powder, and anti UV agents such as benzotriazole. They can be added according to specific application scenarios.

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