The fine mixing technology of characteristic yarn and fiber has its own advantages

2024-03-01 10:49

For the production of characteristic yarn products, fiber composition distribution is one of the key technologies of zui. The combination and distribution technology of fiber components is divided into the technology that can realize the quasi uniform distribution of heterochromatic fiber components in the yarn according to the established mixing ratio requirements (referred to as fine mixing technology for short) and the technology that can realize the combination and distribution of some fiber components in the yarn according to the established special way requirements with the main fiber dimension components (referred to as special distribution technology for short). The fine mixing technology can produce the characteristic products that the components of heterochromatic fibers are evenly distributed in the yarn, while the special distribution technology can produce the characteristic yarn products that some fibers are distributed according to certain requirements. The zui basic and zui ordinary yarn products produced by color spinning semi worsted yarn enterprises belong to the category I product technology of di, while the new differentiated products favored by the market in recent years - Duan colored yarn, color dot yarn, silk rain yarn, etc. belong to the category II product of di technology.


The ordinary spinning process flow of fine mixing technology contains mixing function. During yarn production, the color of fiber raw materials will be slightly different, and can only be blended into one color through mixing, but the mixing function in the ordinary spinning process is limited. For pure cotton yarn products with natural color, if the raw cotton of each shipping mark in the same variety is naturally white due to different origins or the alternation of new and old, but the difference between yellow and white is large, yellow and white yarn defects are likely to occur during production, which indicates the limitation of the mixing function in the ordinary spinning process. The difference in color and performance between fiber components in characteristic yarn products is far greater than that of natural color cotton yarn products. In order to meet the technical requirements of quasi uniform distribution of heterochromatic and heterochromatic fiber components in yarn according to the established mixing ratio, people have designed a variety of fine mixing technical schemes based on the mixing function of the existing process flow.


First, Swiss Rieter fine mixing technology. Its technical core is to realize proportional layer mixing by controlling the thickness of each component fiber layer. This fine mixing technology is a gao end fiber mixing technology with higher technical content compared with the conventional spinning opening and cleaning mixing technology. However, if it is applied to color spinning semi worsted enterprises, it has certain limitations. Therefore, this technology is only suitable for large single varieties with simple, few components and low requirements for color mixing. It is not suitable for small varieties with complex, multiple components and high requirements for color mixing.



The other is Truzler cotton cluster blending system. Truzler cotton cluster blending system is a gao end fiber blending technology with higher technical content compared with the conventional spinning opening, cleaning and blending technology. However, if it is applied to color spinning semi worsted enterprises, it also has certain limitations. It is also suitable for large single varieties with simple, few components and low color mixing requirements, and not suitable for small varieties with complex, multiple components and high color mixing requirements.



Because it is difficult to ensure the accuracy of the dynamic weighing machine, the number of weighing machines configured in this technology limits the number of fiber components. In addition, the investment cost of the combined unit is relatively high, which is difficult for general color spinning and semi worsted enterprises to bear.


Third, special premixing technology for color spinning. The special premixing technology for color spinning is a premixing technology developed by a leading color spinning enterprise for the production of color spinning products, that is, the mixing (or flower mixing) technology before the opening and cleaning process. It is an organic integration of multiple fiber mixing technologies, and one of the important innovations of Zui is to realize the proportional layering (overlapping) mixing of fibers of various components through the ingenious automatic generation method.


Fourth, disc premixing technology. Some textile machine manufacturers use traditional technology to combine the process of "disc cotton grabber → cotton coagulator → packer", which is specially used by color spinning enterprises as the mixing (or flower mixing) technology before the opening and cleaning process, which is a widely used method of color spinning at present. For large color spinning varieties, this technology is relatively labor saving and efficient, and it is a partial repetition of the traditional clearing process, with no professional obstacles in operation and management.


The above fine mixing technologies have their own advantages, and the method to be used cannot be generalized. For example, when a new color textile factory is built or a color textile factory is rebuilt, how to choose depends on the existing objective conditions and product orientation, taking into account the existing plant site, equipment resources, human resources, technical teams, product positioning, etc. However, no matter what method is selected, some common basic process principles should be followed in specific application.


First, the principle of confusion. The fine mixing technology must follow an important process principle of "no mixing, no mixing, no mixing, no mixing". The impurity removal and mixing of fiber materials should not be carried out at the same time to avoid out of control mixing ratio due to different noil rates of different fiber components. Therefore, color spinning and semi worsted enterprises often process raw cotton into cotton mesh (torn carding sliver or combed sliver) first, and then mix (color mixing in proportion), that is, first remove impurities and then mix. If it is cotton polyester blend, the raw cotton is processed into cotton mesh first, and then mixed with polyester fiber.


Second, the principle of mutual exclusion. The principle of mutual exclusion means that different fine mixing methods cannot be mixed. Because different methods have different mixing effects. For example, if the special color spinning premixing technology and the disc premixing technology are adopted, the opening density of the fiber raw materials and the fineness of the mixing are different, and the reflective effect of the cloth woven from the final color spinning yarn product of Zui is different. If the two technologies are used together, local color difference may occur on the cloth surface, causing the cloth surface to rise horizontally.


Third, mix and combine. Fine mixing shall follow the process principle of full mixing as the main, drawing supplement and mixing and combining. The so-called full mixing means that the fibers of all components are fed and mixed (or mixed) together, rather than being combined in the drawing process after separate treatment. The realization of fine mixing cannot only depend on a certain process in the production process. It is necessary to give full play to all the mixing functions in the process flow. If it is combined in the drawing process after differentiated processing, it means giving up the mixing role before the drawing process. After the two color slivers are drawn together, the parallel distribution of the two color fibers in the sliver is obvious. After the two color fibers are drawn together, the two color fibers can still be distinguished. The heterochromatic fibers can only be combined after the two color slivers are drawn together, and it is difficult to achieve the goal of fine fiber mixing.


Therefore, it is not only necessary to rely on the drawing process to achieve fine mixing, but the drawing process can be used as a complementary means of mixing. Color spinning enterprises usually also use the combination effect for color blending and supplement, that is, when the sliver has color deviation, it can be blended with the colored sliver in the opposite direction of color deviation to obtain the cotton sliver without color deviation.


The combination and distribution technology of fiber components that constitute the yarn is the key technology for developing characteristic yarn products. The basic technology for producing characteristic yarn products is to make various fiber components finely mixed and evenly distributed in the yarn. The principle of reasonable mixing should be followed, and the principle of mutual exclusion should not be violated, and mixing and organic combination should be done.