Cotton yarn-like textured composite yarn and a process for manufacturing the same

A false twist textured composite yarn having the appearance and touch of a cotton yarn, said textured composite yarn comprising a core yarn and a sheath yarn composed of a plurality of filaments, said sheath yarn wrapping around the core yarn with a length difference ratio of at least 15%, wherein a part of said filaments of the sheath yarn wrap around the core yarn with a successive alternate twist, while said part of filaments being substantially cohered and at least partially adhered to the core yarn by fusion of the core yarn at the boundary region where the component filaments of the sheath yarn and the core yarn meet, and the remaining component filaments of the sheath yarn being individually separate from each other wrap around the core yarn and the coherent filaments while the remaining filaments are in a crimped state, so that a three-layer structure is formed.