Analysis Of Alkaline Continuous Cylinder Dyeing Process For Polyester Dark Fabric

< p > < strong > technical content < /strong > < /p >

< p > polyester darker fabric alkaline continuous cylinder < a href= "//www.sjfzxm.com/news/index_c.asp" > dyeing process < /a > the auxiliaries for alkaline continuous cylinder dyeing process, according to the composition and technological conditions of the solution, are: TF-121 series products: 1.0g/L~1.5g/L, disperse dyes: X% (O.W.F), bath ratio: 1: 8, temperature: 130 degrees, holding time: 20~30min.

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< p > < strong > basic principle < /strong > < /p >.

< p > the basic principle of alkaline continuous cylinder dyeing: Aiming at the characteristics of oil pollution, slurry, < a href= "//www.sjfzxm.com/news/" > fiber > /a > dye, this technology makes the working fluid satisfy all kinds of degreasing and desizing conditions at the same time, and can achieve ideal dyeing effect at the same time of removing oil and desizing, and obtain certain washing fastness.

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< p > polyester fabric contains a certain amount of oil and stains. Under alkaline conditions, TF-121 series products can be effectively removed and emulsified into the dye solution.

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< p > the pulp size of the weaving process is polyacrylic acid, polyester and PVA.

Polyester sizing agent is similar to polyester molecular structure. It has a very high adhesion to polyester fiber and good weaving effect. It is used more and more.

Generally, the size of the slurry is mixed slurry, so the desizing conditions of the three kinds of slurry are taken into account.

Polyacrylic acid and PVA can be removed under alkaline (pH:8~8.5) conditions.

However, the dispersity of polyester slurry in solution pH>8 is very poor (at the same time, the loss of ammonia during drying is more difficult to remove than sodium salt).

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< p > dye dyed fibers belong to the free volume model. The dye uptake is limited by < a href= "//www.sjfzxm.com" > fiber > /a > free volume, and has saturation value. Only prolonging the holding time does not make the fiber free volume increase, and the dye uptake rate will increase.

In addition, the factors such as precipitation of oligomers at high temperature will affect the quality of dyes.

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< p > disperse dyes are formed through the instant increase of fiber holes, and dye enters the amorphous area of the fibers to finish dyeing. Therefore, dye molecules can not be too large, otherwise they can not enter the amorphous region of the fiber through holes, and the disperse dyes have the structure of complexing with the metal ions. The dye bath requires high water quality. If there are metal ions such as Ca, Fe, Cu and Mg in the bath, the disperse dyes can be complexed, forming a much larger complex than the original dye, thus preventing the dye from spreading to the amorphous region, which affects the dye uptake. Even if some disperse enters, the dye structure has changed, and the dyestuff structure has changed.

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< p > technological innovation < /p >

< p > TF-121 series products can solve the problem of alkaline dyeing well, and realize the alkaline continuous cylinder dyeing process of polyester fabric.

This process can meet the requirements of different polyester terylene fabrics by adjusting the dosage and technological conditions of auxiliaries, compared with conventional process: < /p >

< p > 1. reduced the oligomer in printing and dyeing process and finishing, thus optimizing the performance of < a href= "//www.sjfzxm.com" > fabric < /a >.

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< p > 2. improved the handle and gloss of woven fabrics, and reduced the amount of softeners.

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< p > 3., there is less standby time in printing, dyeing and finishing.

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< p > 4. reduces the cleaning requirements for looms in dyeing units and weaving.

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< p > 5.. After neutralization, the neutralization process is omitted, thereby eliminating the washing process.

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< p > 6., compared with conventional deoiling, the color yield is higher than 1~2, which can effectively improve the dye absorption rate.

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< p > 7. shortened processing time due to reduced pre treatment and alkali cleaning.

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< p > application scope < /p >

< p > < a href= "//www.sjfzxm.com" > polyester fabric < /a > /p >

< p > energy saving and emission reduction effect < /p >

< p > the alkaline continuous cylinder dyeing of machine woven fabric per meter is saved compared with traditional process: 0.21805-0.1138=0.10425 yuan < /p >

< p > calculated in accordance with the largest number of polyester weaving machines in Zhejiang Province, according to the data of the Bureau of statistics in 2011 is 9 billion 638 million 932 thousand and 400 meters, it can save 9 billion 638 million 932 thousand and 400 m x 0.10425 yuan / m =10.04 billion yuan.

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< p > input-output feasibility analysis < /p >

< p > input cost and operation cost: subdivided into water consumption, electricity consumption and others.

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< p > the new process is compared with the conventional process cost (taking a 3 ton cylinder as an example): taking one cylinder cloth for 2000 meters, for example, the cost of each rice cloth can be saved by 0.10425 yuan.

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