Discrimination of air-jet spinning and vortex spinning
The air-jet yarn structure is divided into two parts: the core and the outer fiber. The yarn core is parallel and twisted. The structure is tight. The outer fiber is loose and irregularly wound outside the yarn core. Therefore, the air-jet yarn has a looser structure and a fuller appearance. The vortex yarn structure is also divided into core and outer fibers. The core fibers are arranged in parallel and have no twist. The outer fibers are wrapped in a regular spiral on the surface of the yarn core, and the proportion of regular spiral wrapping fibers in the outer layer is relatively high, accounting for 60% of the total fibers. %, so that the inner untwisted fibers are almost completely covered, which overcomes the core problem of the air-jet yarn, and the surface fiber arrangement is closer to the traditional ring-spun yarn, and the structure is tighter. Therefore, as long as the outer fiber is peeled off, the two can be distinguished by seeing whether the inner fiber is twisted and the outer wrapping fiber is regular. And air-jet spinning mainly spun chemical fiber which is cotton blended, purified fiber yarn and blended yarn. There is no air-jet spinning for all cotton.
Distinguishing Combed Yarn and Compact Spinning Yarn
In compact spinning, there are few neps in the yarn on the entire cloth surface, the yarn evenness is also very uniform, and the cloth surface is very smooth. In addition, you can also see that the disassembled yarn, if it is compactly spun, the whole yarn has very few hairiness, the surface is also very smooth, and the strength is better than that of combed cotton. The entire fabric feels thinner than combed cotton. Therefore, we can distinguish them from the above three aspects.
Discrimination of compact spinning and Siro compact spinning
The similarity between compact spinning and siro spinning is that in the twisting triangle area of traditional ring spinning, a grid plate and a suction condensing device are added. Therefore, the yarn is evenly even and stronger, and the hairiness of the silk is increased. few. The difference is that compact spinning uses a single feed on the spinning frame, while siro spinning feeds two rovings with a certain distance on the spinning frame. After drafting, the front roller outputs the two single strands. Due to the transmission of twist, the single yarn strands have a small amount of twist. After being combined, they are further twisted into yarns similar to plies, which are wound on the bobbin.
