The invention relates to a production method of tight sirospun
yarn of combed
crystal cotton. The production method comprises the following sequential working procedures: combed cotton preparation; opening, cleaning and blending of combed cotton and
crystal cotton; cotton
combing; drawing; roving; mixing of sirospun
yarn of nylon filament; and winding. According to the invention,
crystal cotton
fiber is blended with the combed cotton
fiber, the tight sirospun
yarn of the nylon filament is added during the
spinning working procedure, and a double-rough-yarn feeding device and a tight
spinning device are additionally installed on a traditional ring
spinning frame, so that two threads of rough yarn are simultaneously fed to a drafting region, a certain spacing is reserved between drafted
fiber strands, and the drafted fiber strands are gathered, converged and twisted at the downstream of the roller
chop to obtain yarn. Under the action that the fiber strand twisting triangular region is canceled due to bundling action and two threads of fiber strands are combined, the filoplume value of single yarn is obviously reduced, the yarn evenness is significantly improved, the fracture strength is greatly increased and better
resultant yarn quality is obtained; and functional yarn with high strength, high hygroscopicity, cleanness, high elasticity and bacteriostatic characteristic is produced by the equipment.