The invention discloses a production technology for producing porous fine denier
colored terylene pre-oriented filament by utilizing recycled
polyester bottle flakes. In the invention, the porous fine denier
colored terylene pre-oriented filament approximating to that produced by primary
polyester chips is produced by utilizing recycled
polyester bottle flakes and color master batches as main materials and through the work procedures such as melting and
extrusion by a screw extruder,
filtration by an on-line switchable melt filter,
spinning by a porous fine denier spinneret plate, side-blowing cooling, oiling by an oiling
nozzle, winding to shape, and the like. The spinneret orifice of the adopted spinneret plate is formed by the combination of multiple round holes which are arranged in a concentric circle type, the quantity of the round holes is equal to that of monofilaments, and the section of a
fiber which is span from the spinneret orifice and formed after the work procedures of drafting, cooling and the like is round in shape. The product produced by the method of the invention can replace the porous fine denier
colored terylene pre-oriented filament produced by the conventional method; the
fineness of the monofilament is small, the handfeel is wonderful, and the
production control is table; and the porous fine denier colored terylene pre-oriented filament can be broadly used in the fields of garment fabric and industrial fabric.