Polyester-cotton fabric is one of the most popular textile fabrics for consumers. Because it contains two components of polyester-cotton, it takes into account the advantages of two kinds of fibers. It has the advantages of low price, good hygroscopicity and good shape retention. However, due to the different components, the dyeing process is cumbersome. The traditional dyeing process must include the three processes of cotton component pretreatment, polyester dyeing, and cotton dyeing, which are not only time-consuming, but also consume energy, low efficiency, and quality control. Many, product quality is not easy to control. Sipimo Hair Essence uses modern technology to extract precious Chinese medicines such as Hair Care,Hair Treatment,Hair Care Products,Hair Growth Treatment Shenzhen Sipimo Technology Co., Ltd , https://www.sipimotech.com
By applying the new material SR to the processing of polyester-cotton fabrics, Yiwu Jiadelai Co., Ltd. innovated a new energy-efficient polyester-cotton smelting and dyeing same bath new process, shortened the process flow, and achieved energy saving and emission reduction, and improved processing efficiency and quality the goal of.
The production process uses polyester-cotton knitted fabric as an example, using SR, glacial acetic acid, high-temperature levelling agent BOF, non-foaming soaping agent, aldehyde-free fixing agent, dispersed dark blue, medium temperature reactive dyes and other agents. The reference process is: SR × 40 ℃ × 30min → HAC 0.5g / L, disperse dye x%, BOF running for 10 min → heating to 130 ℃ for 40 min → cooling reduction cleaning → dyeing cotton → soaping → fixing color → soft → dehydration drying → setting .
The technical indicators of the SR new process dyed finished products will be tested simultaneously with the SR new process dyed finished products and the same specifications of fabrics processed by traditional processes. The results are as follows:
The color difference is close to the traditional craft ≥3.5;
The fixing rate is equivalent to the traditional process. Reactive dyes ≥70% (depending on the type of dye);
The color fastness to washing is equivalent to the traditional process ≥3;
The color fastness to rubbing is equivalent to the traditional process ≥ 2.5;
The sun fastness is equivalent to the traditional craft ≥3 grade;
Does not contain 23 kinds of carcinogenic aromatic amines;
Formaldehyde≤25ppm;
pH value = 4.5 ～ 7.5;
Shrinkage in warp and weft directions≤4.5%
Compared with the characteristics of the new SR process and the traditional process Compared with the traditional polyester-cotton dyeing process, the new SR process has the following characteristics.
1) The use of formaldehyde, APEO, easily biodegradable, environmentally friendly raw materials, a new printing and dyeing agent SR synthesized by polymer polymerization is not only environmentally friendly, but also has high temperature resistance, electrolyte resistance, and a wide range of pH stability Features, fully meet the requirements of the dyeing process, ensure that the quality of the products produced is stable, and the effect of different batches is the same. Because it avoids the pretreatment with alkali in the traditional processing technology, it completely eliminates the defects such as alkali spots that are difficult to repair due to the imperfect washing of the fabric and the inexhaustible alkali removal of the fabric after alkali cooking; ensuring the stability and repeat of the process Sex.
2) Using the existing equipment of the factory and relying on the support of efficient and environmentally friendly new printing and dyeing materials SR, the pretreatment process is loaded in the subsequent dyeing process, saving the pretreatment process, shortening the processing process, saving time, reducing labor, and improving Production efficiency, reduce energy consumption, reduce sewage emissions, reduce production costs to achieve efficient and short-flow processing, to achieve the purpose of reducing energy consumption.
3) The types of additives are reduced, the procurement intensity is simplified, the storage burden is reduced, the labor intensity and labor are reduced, and the addition of a large amount of pre-treatment agents is reduced to reduce the sewage treatment load.
4) This process simplifies the operation process, the operation is simple and convenient, and the variable factor affecting the dyeing quality will be greatly reduced.
The comparison of processing cost between the new SR process and the traditional process proves through production practice that the new SR process can achieve the purpose of energy saving, consumption reduction and cleaner production. According to the actual situation of the practical enterprise, after the comparison of the new and old processes, the processing cost equivalent to 1 t of fabric per change is as follows:
1) Saving water 50t (bath ratio 1:10), according to tap water price 5 yuan / t, it can save 250 yuan;
2) Reduce the sewage discharge by 50t, according to the sewage treatment of 2 yuan / t, it can save 100 yuan;
3) Save processing time by 120min;
4) Saving electricity by 90 degrees, calculated at an average electricity price of 0.68 yuan / degree, which can save 61.2 yuan;
5) Saving steam 2.5t, according to the steam unit price of 130 yuan / t, it can save 325 yuan;
6) Saving the cost of pre-treatment additives: 325 yuan;
7) Reduce labor wages: 55 yuan.
As a new energy-saving and emission-reducing new technology with high potential, the high-efficiency and environmental-friendly SR new technology is worth promoting to the industry. Based on the national annual production of dyed fabrics of 500,000 tons, it can save 25 million tons of fresh water resources, reduce 25 million tons of sewage discharge, save 1.25 million tons of steam, save 45 million kilowatts of electricity, reduce the consumption of caustic soda by 1 million tons, and increase production efficiency by 25% The comprehensive direct cost per ton of fabric can be reduced by 1116.2 yuan, and the annual cost savings are 560 million yuan. This technology can drive the multi-component fiber blended and interwoven fabrics of the entire printing and dyeing industry in China to achieve energy-saving, cost-effective and efficient dyeing and finishing production. It has great market potential and promotion value, as well as significant economic and social environmental benefits.
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