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Comparative analysis on the quality of cotton polyester yarn spun by different spinning methods

Summary:

This paper discusses the quality of Siro, Siro AB yarn and traditional ring spun yarn. Four kinds of Siro, Siro AB yarn and traditional ring spun yarn with different yarn numbers are spun, and the strength, elongation, hairiness and evenness of each yarn are tested, The characteristics and adaptability of each spinning mode are analyzed. The results show that Siro and Siro AB yarn are obviously superior to the traditional ring spun yarn in terms of strength and elongation, hairiness quantity and yarn dry quality. Compared with Siro AB yarn, Siro AB yarn has a slightly better strength and yarn dry index, and the hairiness level is basically the same. It is considered that siro spinning method is an effective way to improve the quality level of cotton polyester blended yarn, Different spinning methods have different characteristics and adaptability. In actual production, the suitable spinning methods should be selected according to the spinning raw materials, the quality requirements of the spinning number and the spinning conditions, and the yarn meeting the quality requirements of users should be spun to meet the market demand

The technical principle of siro spinning is that two identical rovings are fed into the drafting mechanism of the spinning frame in parallel at a certain distance, and drawn in parallel state. Two fiber bundles with a certain distance are formed after coming out from the clamping point of the front roller. These two strands naturally converge under the twisting action of the front roller, Twist and synthesize siro spinning yarn with strand style. In the research on the influencing factors of siro spinning, researchers generally think that the size of the feeding distance of the sliver is the primary factor affecting the yarn structure and performance. However, because of the particularity of the yarn forming process, Siro yarn has the characteristics of fewer feathers, better dry sliver, smooth surface, round section, etc., and its technological process is short, In recent years, its research and application are more and more extensive

Siro spinning is fed by two rovings, the roving quantity of the spinning frame needs to be doubled, and the frame and feeding bell mouth of the spinning frame need to be modified. Because the roving ration and the roving volume capacity need to be reduced, the production efficiency of the pre spinning process will be affected to some extent, and the spinning operation requirements are relatively high. The feeding of two roving makes the roving ration increase obviously, which is affected by the drafting multiple, To a certain extent, the number of spins is limited, which is more suitable for spinning medium and coarse and fine yarn

Siro AB spinning is a special form of siro spinning. Two rovings with different dyeing properties are used respectively, such as cotton and polyester roving described in this paper. Because the two fibers cannot be fully mixed, the blended yarn can form fancy yarn with special color style after dyeing. Two rovings with different colors can also be used to directly spin fancy yarn, This spinning method is mainly used for spinning special yarn

The traditional ring spinning blended yarn is fed by single blended roving, with mature technology, relatively simple process, no need for special transformation of equipment, and relatively low requirements for operation and management. When spinning fine yarn, especially the super fine yarn under 9.8tex, heavier roving ration can be used. The quality of the semi-finished products of the front spinning is easy to control, less spinning ends are broken, spinning efficiency is high, and operation and management is relatively simple, The spinning cost is relatively low, and it still has certain advantages in spinning fine yarn, especially super fine yarn

In a word, different spinning methods have different characteristics in yarn performance, quality level, technological process, equipment configuration, variety use and adaptability. In actual production, enterprises should select appropriate methods for production according to spinning materials, yarn use, user quality requirements and technical characteristics of spinning methods

epilogue

It can be seen from the comparison that Siro yarn and Siro AB yarn are obviously superior to the traditional ring spun yarn in terms of strength and elongation performance, hairiness quantity and strip dry quality, while Siro yarn is slightly superior to Siro AB yarn in terms of strength and strip dry index, The hairiness level is basically the same. It shows that siro spinning method is an effective way to improve the quality level of cotton polyester blended yarn. Different spinning methods have different characteristics and adaptability: siro spinning needs double roving feeding, the number of roving is doubled, and the frame and feeding bell mouth need to be modified. Because the roving quantity and roving volume capacity are reduced, the production efficiency of the pre spinning process will be affected to a certain extent, The spinning operation requirements are also relatively high. Restricted by the roving quantity and the drafting multiple of the spinning, it is more suitable for spinning medium and general fine yarn; Siro AB spinning is a special form of siro spinning, which is mainly used for spinning fancy yarn with special color style; the traditional ring spinning is single roving feeding, with mature technology, relatively simple process and no special transformation of the equipment, The requirements for operation and management are relatively low. When spinning the fine yarn, especially the super fine yarn under 9.8 tex, the heavy roving quantity can be used. The quality of the front spinning semi-finished products is easy to control, the spinning ends are less, the efficiency is higher, the spinning cost is relatively low, and it still has certain advantages in spinning the fine yarn, especially the super fine yarn. In short, in actual production, The enterprise shall select suitable spinning methods according to the spinning raw materials, quality requirements of the spinning number and spinning conditions, and spin out the yarn meeting the quality requirements of users to meet the market demand