Suessen Compact Spinning

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Compact Spinning

Compact spinning technology is an improvement based on traditional ring spinning frames. By adding a bundling zone in front of the front roller, fibers undergo a process of organization and bundling before being twisted. This improvement effectively reduces the twisting triangle area, resulting in fibers that are more tightly gathered and arranged more uniformly and straightly. Consequently, the number of hairiness in the yarn is significantly reduced, and the yarn evenness and strength are also improved accordingly. Currently, compact spinning technology mainly utilizes two methods to gather fibers: one is through airflow, and the other is through mechanical means.

During the twisting process of compact spinning, due to the good straightness and structure of the fibers, the internal and external transfer of fibers is effectively controlled. At the same time, the fibers on the surface and both sides of the sliver are also better managed, making it easier for the fiber ends to be twisted into the yarn body. Therefore, compact spinning results in even yarn consistency, improved strength, reduced hairiness, and improved friction resistance. In addition, in subsequent processing, compact spinning can also eliminate the need for singeing and waxing, reduce fabric pilling, thereby improving the efficiency of the loom and enhancing the printing and dyeing effect of the fabric.

However, the technological transformation of ring spinning frames for compact spinning is somewhat complex and demanding, thus resulting in relatively high transformation and production costs. Simultaneously, compact spinning technology also imposes stringent requirements on the evenness and uniformity of the roving. Despite this, compact spun products, characterized by their compactness, uniformity, and good luster, are still suitable for traditional high-end fabrics. However, it should be noted that compact spinning cannot completely replace ordinary ring spinning. For instance, yarn for pile fabrics and some special style products still needs to be produced on ordinary spinning frames.

Sirospun
Siro spinning, a spinning technology born on traditional ring spinning frames, successfully produces yarn with a structure similar to plied yarn. Its history can be traced back to its application in the wool spinning field, and it gradually expanded to the cotton spinning field. In the siro spinning process, two roving strands, which are kept at a small spacing, are introduced in parallel into the same drafting zone of the spinning frame. After drafting, the front roller outputs two single yarn slivers, each of which carries a small amount of twist. Subsequently, they are merged and further twisted to form siro yarn similar to plied yarn.

The uniqueness of Siro spinning lies in the co-twisting of two single yarn strands in the same direction. This makes the fiber transfer during the twisting process gentler compared to conventional fine yarn twisting. As a result, the fibers remain relatively straight, with reduced spatial helical fibers and a lower chance of fiber ends protruding, ultimately giving the yarn a smooth surface. When the two strands converge for co-twisting, the twist of the combined yarn increases rapidly, and the fiber helix and inclination also increase accordingly, thereby enhancing the strength of the combined yarn. It is worth mentioning that the twisting mechanism of Siro spinning is different from that of general double-stranded yarn, which results in a more orderly fiber arrangement, reduced hairiness, tight structure, and significant improvements in gloss and wear resistance.

When implementing siro spinning, the selection of roving is crucial. These two roving strands can be made of different fibers, or they can be the same fiber or have the same blend ratio. Fabrics woven from this type of yarn can exhibit a full and lively style with a strong three-dimensional effect, achieved by dyeing the different fibers individually or together. Therefore, they are highly favored in high-end textiles.