Compact spinning is a new spinning technology that is spun on an improved new ring spinning machine.
Its spinning mechanism is mainly:
A fiber condensation area is added in front of the traction device of the ring spinning machine, which basically eliminates the spinning and twisting triangle area between the front roller and the twisting point.
After the fiber strips are output from the front opening of the front roller, they first pass through the mesh apron coated by the special-shaped air suction duct. The fiber strips move on the mesh apron due to the contraction and polymerization of the air flow;
Through the suction groove of the special-shaped tube, the whiskers are gathered and rotated, and gradually transform from a flat ribbon to a cylinder. The ends of the fibers are all twisted into the yarn, so the yarn is very tight, and the yarn has a smooth appearance and less hairiness.
Compactly spun yarns have higher strength, less hairiness, and are least prone to fraying during the weaving process. Therefore, compactly spun yarns are most suitable for producing various types of yarn-dyed fabrics.
The purpose of compact spinning is to make the fibers as parallel and close as possible before twisting the yarn. This is an important criterion for high-quality compact spinning yarns. Making the fibers as parallel and consistent as possible before twisting is a prerequisite for its advantage.
Advantages and disadvantages of compact spinning
advantage:
1. Since before twisting, the single fibers in the yarn are fully straightened, parallel to each other, and closely arranged, the diameter of the yarn becomes very small at the jaws of the twisting roller, so the “twisting triangle area” is basically eliminated;
Since the single fibers are fully straightened and parallel before twisting, and no hairiness extends out of the main body of the yarn, the yarn has very little hairiness, especially hairiness above 3 mm.
2. In spun yarn, since each single fiber is twisted in a straight and parallel state, when the single yarn is subjected to tension, the force of each single fiber is basically the same, so the compact spinning strength is higher than that of traditional single yarn. And because the single fibers in the compact yarn are closely arranged and have strong cohesion with each other, this also helps to improve the strength of the yarn.
3. In the compact spinning process, the yarn slivers are gathered after completing the draft specified by the process;
Therefore, the index of uneven sliver has not been greatly improved, but its gathering area has a finishing effect on the yarn, and when twisting at the twisting roller nip, the transfer of the inner and outer layers of the fiber is not as strong as in the traditional process, so The evenness of compact yarn is uneven, and the thickness and detail indicators are better than those of traditional yarn.
4. Because the fibers of compact yarn are closely arranged and have a smaller diameter than traditional yarns of the same number, the cloth woven with the same warp and weft density has good air permeability and a flat and smooth surface, making it an ideal yarn for high-end textiles.
shortcoming:
1. The cost of compact spinning equipment is relatively high, which increases the equipment investment of spinning mills.
2. Except for the great improvement in the hairiness index, other yarn indexes such as evenness, thickness, and details have not improved much.
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