One Bath Two Step Hot Melt Dyeing Technology Of Disperse / Active

< p > for a long time, < a href= "http://www.91se91.com/news/index_c.asp" > polyester cotton weaving fabric < /a > hot melt dyeing, shallow medium color adopts dispersion / reduction or dispersion / activity one bath two step process, dark color adopts dispersed, active two bath two step process.

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< p > these two processes have great defects. The dispersing / reducing one bath < a href= "http://www.91se91.com/news/index_c.asp" > two steps < /a > process, the cost is high, and the color light of some color varieties (such as purple) varies greatly under dry, damp, cold and hot conditions, so it is difficult to color, and the customers do not return to the same color when delivery. The two step process of dispersing and activating two bath is twice the process of one bath and two steps. It not only increases the < a href= "http://www.91se91.com/news/index_c.asp" > dyeing auxiliaries > /a > cost (more than one reduction and cleaning), but also doubles water and electricity, steam and labor costs, and the output is also reduced by half.

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< p > but the dispersing / activating one bath two step process, because the disperse dyeing does not carry on the reduction to clean, the disperse dye's floating color attachment fiber, to the dyed fastness (mainly is the friction, the water wash fastness) has the adversely influence.

At present, with the introduction of the domestic high washing fastness disperse dyes, it is possible to apply the dispersing / activating one bath two step process to large production.

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The P series SWF series high fastness disperse dyes produced by Zhejiang Longsheng Dyestuff Chemical Co., Ltd. are produced by Yixing Yue Qi Textile Group Co., Ltd., more than 50 meters, and the fastness meets the requirements.

It is worth promoting, and is of great significance in the field of continuous pad dyeing for the implementation of national energy conservation and emission reduction strategy.

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< p > related links: < /p >

< p > high yield SWF series disperse dyestuff production example < /p >

< p > grey cloth pretreatment (singeing, boiling, shaping, mercerizing to grinding), dyeing and finishing (fixing soft and drying, temperature below 150 C, time 30 seconds to preshrinking) < /p >

< p > general situation < /p >

< p > Yue Qi textile group dyeing factory, in the past, it was mainly made of pure cotton. Now it is developing rapidly to many components such as regenerated polyester, cotton and spandex. At present, polyester cotton varieties account for more than 1/3, and will be over 1/2 in the future.

The polyester cotton hot-melt dyeing process is light colored with disperse / Shilin bath two step dyeing, medium and dark dyed with disperse, reactive two bath two step dyeing.

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< p > Lok textile has received a lot of orders recently, mainly in the medium and deep color foreign trade list. The delivery time is very tight. The conventional two bath process can not meet the production requirements. The company leaders require the technology department to conquer the scattered / active one bath two step process, not only to double the output, but also to meet the export fastness standard.

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< p > production condition < /p >

< p > dyeing mode < /p >

< p > continuous hot-melt dyeing < /p >

< p > dyed grey cloth < /p >

< p > Cotton (100%) / polyester (95%) + spandex, yarn 32S * (16s+70D) / density 190 * 60 width width 86 "CVC elastic straight tribute weaving fabric finished door width 53" < /p >

< p > production quantity 4530 m < /p >

< p > dyeing prescription < /p >

< p > deep coffee > /p >

< p > Longsheng disperse dark blue SWF 300% 18g/L < /p >

< p > Longsheng disperse red jade SWF 200% 4.5g/L < /p >

< p > Longsheng disperse yellow brown SWF 200% 24g/L < /p >

< p > reactive blue GG 9.4g/L < /p >

< p > active red CD 6.15g/L < /p >

< p > active orange SNE 10g/L < /p >

< p > anti drift agent CH20 (pant) 20g/L < /p >

< p > saving calculation < /p >

< p > one bath two step process reduces 5 processes compared with the two bath two step process, which greatly saves cost and time.

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< p > 1. steam cost < /p >

< p > the fixed color steam steamer is 0.4 tons of steam per hour while the factory is equipped with 12 washing boxes, of which 3~4 washing boxes need to be heated and soaped and dried.

The two bath method also needs to re dip the reactive dyestuffs before pre drying and drying. Therefore, the two bath method needs more steam consumption of about 3 tons per hour than the normal one bath production.

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< p > according to the price of 200 yuan per ton of steam, the consumption of steam is 600 yuan per hour. According to 5 hours per hot melt dyeing machine per day, each hot melt dyeing machine is calculated by 300 days per year, and the cost of single steam saving in one year is as high as 900 thousand yuan.

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< p > 2. water fee < /p >

< p > each hot melt dyeing line consumes 20 tons of water per hour. According to 8 yuan per ton of water, 300 days a year, 1 hot-melt dyeing lines are made according to 5 hours per day, and the cost of water saving is 240 thousand yuan.

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< p > 3. electricity tariff < /p >

< p > electricity cost is saved by 300 thousand yuan per line per year.

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< p > 4. auxiliaries < /p >

< p > auxiliaries (caustic soda and 40~50g/L of insurance powder) save 333 thousand yuan per line per year.

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< p > 5. artificial wages < /p >

< p > annual labor wages can be saved by 126 thousand.

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< p > 6. yield > /p >

< p > one bath two step method can increase 1 times than two bath two step method.

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< p > 7. dye cost < /p >

< p > the cost of dye is increased by 400 thousand yuan per line per year (according to a deep brown color meter).

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< p > color palette < /p >

< p > use two bath and two step method, first disperse dyestuff and then dye cotton.

After dyeing cotton, it is possible to see the effect of color, color and cloth. It is often found that when polyester is dyed deep or too shallow, it needs to be remade and dispersed.

If one bath two step method is used, the dispersing and activity can be completed at one time, and the color and cloth surface effect can be seen immediately, which greatly improves the dyeing success rate (RFT).

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< p > dispersing / activating one bath two step method can basically replace the two step method of dispersing / reducing one bath, which is more economical and convenient for color changing and workshop management.

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< p > color difference < /p >

< p > dyeing head and tail color difference, left middle right color difference completely meet the requirements.

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