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Pure cotton fabric with reactive dyes is cold pad-batch dyeing
Jun 11, 2018

Cold pad-batch dyeing process equipment, less investment, low capital cost, strong adaptability, low energy consumption, high utilization rate of dye, less pollution, dyeing cloth products effectively. Washes colour and lustre is full, do not fade, is increasingly used in fabric production. But before and after the process in dyeing process is easy to appear off color, the left right off color, and the first printed cloth black seam gas, and the problems such as shallow side. In actual production, we summarized a set of effective production process, which can effectively solve the above problems.

1 cold pad-batch dyeing process

1.1 material

145/147 cm36 fabric specifications. 9 Tex tex425.2 root / 10 cm x 220.5 x 49.2/10 cm cotton fabric

RGB, reactive dyestuff reactive red yellow RGB, reactive blue RGB, reactive black W  G, active navy GG, reactive blue DSE arithmetic, sodium silicate and caustic soda.

1.2 the process flow

The former processing semi-finished products - water - drying - stenter coil - rolling material (a dip a rolling) to call volume, piled up (14 ~ 16 h) to washing to soaping, washing, drying

1.3 alkali agent selection

Mass production practice test shows that a reasonable choose compound alkali. Sodium silicate as a buffer to slow release of OH - ions, a steady supply of dye solution pH value, to extend the time of dye solution stability, increase the rate of solid color, finished product color dyeing reproducibility and color stability. Too little dosage of sodium silicate, dye solution pH value is not stable, light volatile; Consumption is overmuch, water will increase difficulty, cause fabric feel stiff. So, generally by using a silicon technology, 40 ~ 42 ° Be dosage of sodium silicate 50 ml/L (the total dosage of sodium silicate as silicon method 95 ml/L). For ease of production, the mixed alkali dosage is divided into three concentration range, as shown in table 1.

1.4 dye selection

Cold pad-batch dyeing with reactive dyes, the solubility under neutral condition is more than 150 g/L, because the alkaline dye solution of Na + increased, to cause a decline in the dye solubility and condensation of dye, dye penetrant difficulties caused the formation of a surface color. Selection of reactive dye immediacy, facilitate both before and after the color control; Room temperature faster reaction rate, can normal piled solid color; Spell mixed dyes to synchronous dyeing, synchronization, solid color, synchronization, hydrolysis, color stability, easy to control.

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