2019欧美hd精品

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    Three factors affecting high temperature dyeing machine
    Mar 21, 2020

    The first is temperature. Temperature is critical for high temperature dyeing machines. Increasing the temperature can effectively improve the dyeing rate of the entire disperse dye. However, if the temperature is higher than 130 degrees, many The change in the dyeing rate of the dispersed dyes is no longer obvious, so if the temperature is too high, the polyester ester bonds will be hydrolyzed, which will cause the fiber to have a significant decrease in strength and elasticity, and the color light will be poor. Therefore, under normal circumstances, the high-temperature dyeing temperature cannot exceed 145 degrees, and the normal temperature can be maintained between 125-130. If you dye in this temperature range, not only the color will be higher, The whole leveling effect is also good. In order to allow the fuel to be evenly absorbed by polyester, we should strictly control the rate of temperature rise. When the temperature reaches the specified temperature, it should be held for a period of time to ensure that the dye can fully Penetration or diffusion, the normal thermal dyeing time is between 30-60 minutes, if you want a light color effect, then the time Slightly shorter, if the stain deeper, then relatively speaking time to be longer, after the entire dyeing process can not cool down too fast, otherwise there will be creases or affect the feel and other effects.

    The second is the application of auxiliaries. At the same time, when dyeing at high pressure and high temperature, in order to ensure that the dye can be stably dispersed in the dyeing bath, and if you want to obtain a good leveling effect, we can properly in the dyeing bath. Add leveling agent or dispersant and other additives.

    Finally, the pH value is reached. Many dispersed dyes do not actually experience any hydrolysis under high temperature and alkaline conditions. Therefore, in high-pressure and high-temperature dye bath control, the effect should be good under acidic conditions.

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    2019欧美hd精品
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