Apparatus (1) for producing a nonwoven fabric comprising a spinneret (2) and a mechanical drawing device (5) which comprises primary rollers and secondary rollers (21, 22) which are constrained to a frame (50) such that, considering a condition of use, said secondary rollers (21, 22) are movable with respect to said primary rollers (11, 12, 13) between a first position of operational disengagement from said filaments (3), and a second drawing position of said filaments (3).

The present invention relates to a manufacturing method of a unique textured yarn by upgrading the equipment and processing the modified single-material precursor, the textured yarn thereof, and the fabric made with the textured yarn thereof. According to the method, titanium dioxide is added into a precursor of PET pre-oriented yarn with single filament DPF<0.5 to form the first precursor. Then, the first precursor is fed into a flat conveying roller, and then into a differential roller, and then into an accelerating roller to form a dark and light double colored textured yarn with linen-like appearance and tone. Then, the dark and light double colored textured yarn is conveyed to a heater for heating and setting, and then conveyed to a false twisting machine for processing. Finally, it is conveyed to a nozzle for spraying.

An object is to provide a production method for a precarbonized fiber bundle and a precarbonization furnace capable of continuously producing the precarbonized fiber bundle for a long period of time by efficiently discharging a decomposition gas containing a tar component generated when performing a precarbonization treatment at the time of carbon fiber production and retained in a heat treatment chamber throughout the heat treatment chamber. The production method for a precarbonized fiber bundle includes allowing an aligned stabilized fiber bundle vertically arranged in one or two or more tiers to travel horizontally in a heat treatment chamber and heat-treating and precarbonizing the stabilized fiber bundle at a maximum temperature of 300 to 1,000 C. using an inert gas supplied from an inlet side and an outlet side of the heat treatment chamber, in which a flow rate ratio Q2/Q1 satisfies Formula (1) below, where Q1 represents a volume flow rate of gas in a first exhaust discharged out of the heat treatment chamber from a position higher than a position of an uppermost tier of the traveling stabilized fiber bundle, and Q2 represents a volume flow rate of gas in a second exhaust discharged out of the heat treatment chamber from a position lower than the position of the uppermost tier of the traveling stabilized fiber bundle:
0.01Q2/Q10.5Formula (1).

Apparatus (1) for producing a nonwoven fabric comprising a spinneret (2) and a mechanical drawing device (5) which comprises primary rollers and secondary rollers (21, 22) which are constrained to a frame (50) such that, considering a condition of use, said secondary rollers (21, 22) are movable with respect to said primary rollers (11, 12, 13) between a first position of operational disengagement from said filaments (3), and a second drawing position of said filaments (3).