Today, we introduce the three advantages of pre-spinning with polyester masterbatch. The next two introduce the remaining two advantages.
(1) Polyester masterbatch is easy to use before spinning. Pre-spinning coloring does not have any special requirements for polyester production and fiber use, the original spinning equipment, and the existing production process. Especially when polyester is blended with other fibers, the use of polyester fiber not only reduces the dyeing process, but also makes it possible to interlace fibers and polyester blends that are not suitable for high temperature and high pressure dyeing conditions and to facilitate the pre-design of the fabric. Therefore, the pre-spinning coloring can be said to be a dyeing factory without investment, and it is one of the shortcuts to solve the "bottleneck" of dyeing and finishing with advanced technology.
(2) Polyester masterbatch for low pre-spinning coloring: The cost of dyeing is the consumption of energy and additives. Pre-spinning reduces the dyeing process of printing and dyeing equipment and multiple fibers or fabrics, removes the dyeing auxiliaries, and combines each pigment molecule into the target product, which virtually eliminates the dye emission and reduces the consumption of raw materials. It avoids environmental pollution, reduces the cost of dyeing, and saves huge pollution control costs.
According to some reports, “Comparative polyester dyeing and fiber-forming dyeing, each 100 tons of raw liquid dyed polyester staple fiber can save 10,000 tons of water, save gas by 165,000 cubic meters, and save 56,000 kWh of electricity.” Fiber dyeing produces about 10 tons of wastewater per 100 kilograms of product."
According to the survey, the average dyeing fee for dyeing is about 4,000 yuan, and the coloring of the masterbatch before dyeing is only about 1,200 yuan. It can be seen that the pre-spinning coloring not only saves a huge amount of pollution control costs, but also the coloring cost is only dyed. One-third, that is, the cost of dyeing is more than three times higher than the coloring of the stock solution.
(3) The quality of polyester masterbatch for pre-spinning coloring is high: conventional dyeing is mainly carried out under high temperature and high pressure conditions using disperse dyes as described above. However, due to the production of fibers and physicochemical treatment, it is difficult to ensure the uniform distribution of the crystal structure and the amorphous region of the internal structure. The crystal form, dispersibility and dyeing rate of the dye are often different, so the fabric tends to be easily produced during the dyeing process. Dyeing defects such as chromatic aberration, color spots, and color flowers.
Pre-spinning coloring is to accurately measure the colorant and the original color before spinning, uniformly mix, melt filter, and then draw the wire, so the fiber is dyed evenly, regardless of the batch size, the uniformity of color can be kept unchanged. There is also no unacceptable color difference between batches. From the structure of the pre-spinning colored fiber, the colorant and the polyester form a uniform solid solution in the surface, and the light fastness, washing resistance, rubbing resistance and the like are far higher than conventional dyeing.
