A yarn producing apparatus produces carbon nanotube (CNT) yarn by aggregating CNT fibers. A substrate support supports a CNT forming substrate, a winding unit 7 continuously draws the CNT fibers, a yarn producing unit aggregates the CNT fibers, and a substrate replacing mechanism replaces the carbon nanotube forming substrate supported on the substrate support with another carbon nanotube forming substrate.

An article of manufacture making system for making an article of manufacture containing a plurality of dry solid additives, such as fibers, that utilizes a dry solid additive delivery system with a relatively low Stokes Number for the dry solid additives.

An article of manufacture making system for making an article of manufacture containing a plurality of dry solid additives, such as fibers, that utilizes a dry solid additive delivery system with a relatively low Stokes Number for the dry solid additives.

The polytrimethylene terephthalate fiber satisfies the requirements that a peak value of the thermal stress of the fiber be present in the temperature range of from 40 to 100 C., the peak value be 0.1 to 0.8 cN/dtex, and the fiber have an elongation at break of 60 to 200%. The method for producing a fiber includes melting and solidifying polytrimethylene terephthalate, and then winding up the solidified polytrimethylene terephthalate at a winding speed of 1,000 m/minute or more, and heating the resultant polytrimethylene terephthalate using a heated roller at a temperature which is 20 C. of the glass transition point of polytrimethylene terephthalate, and drawing the heated polytrimethylene terephthalate at a draw ratio of 1.0 to 2.0 times, and further winding the drawn polytrimethylene terephthalate round a heated roller at 50 to 150 C. and then winding up the resultant polytrimethylene terephthalate at a rate of 2,000 to 4,800 m/minute.

The polytrimethylene terephthalate fiber satisfies the requirements that a peak value of the thermal stress of the fiber be present in the temperature range of from 40 to 100 C., the peak value be 0.1 to 0.8 cN/dtex, and the fiber have an elongation at break of 60 to 200%. The method for producing a fiber includes melting and solidifying polytrimethylene terephthalate, and then winding up the solidified polytrimethylene terephthalate at a winding speed of 1,000 m/minute or more, and heating the resultant polytrimethylene terephthalate using a heated roller at a temperature which is 20 C. of the glass transition point of polytrimethylene terephthalate, and drawing the heated polytrimethylene terephthalate at a draw ratio of 1.0 to 2.0 times, and further winding the drawn polytrimethylene terephthalate round a heated roller at 50 to 150 C. and then winding up the resultant polytrimethylene terephthalate at a rate of 2,000 to 4,800 m/minute.