As we all know, polyester-cotton fabric has good wear resistance and wrinkle resistance, but because the polyester fiber is a hydrophobic fiber, it has a strong affinity for oil stains, it is easy to absorb oil stains, and it is easy to generate static electricity during the wearing process and attract dust, it is difficult to wash . With the acceleration of life rhythm and the requirement of environmental friendliness, people require the fabric to have "easy cleaning" performance, that is, the fabric is not easy to be stained in the dry state. Even if it is stained, dirt, especially oily dirt, in the washing process can be easily washed This is what is commonly referred to as "easy to decontaminate" finishing. The work clothes of chefs in hotels and restaurants, and the work clothes of employees in some heavy-duty enterprises who are often exposed to diesel oil and motor oil, etc. After easy decontamination and cleaning, it is easier to wear and clean, so it is very popular. In this paper, through the analysis of the surface properties of polyester-cotton fabrics, based on the selection of process conditions, the appropriate process flow is determined and the process conditions are optimized.
Process principle
The easy-to-decontaminate finishing of polyester-cotton fabrics is mainly solved from two aspects, one is to improve the hydrophilic properties of polyester fibers, and the other is to improve the oil-repellent properties of the fibers in the air, that is, to improve the surface properties of the fabric by chemical finishing and reduce its The surface tension in the air, so that the fabric has dry anti-oil stain; when washing, the hydrophilic segments in the easy-to-decontaminate finishing agent will be aligned on the surface of the fabric, making it hydrophilic to produce decontamination and prevent re-staining The role of pollution.
Choice of easy decontamination finishing agent
Since the fluorocarbon-based polymer has a very low surface tension, with the growth of the fluorocarbon-based chain, the better the waterproofness and oil resistance of the fabric after finishing, the introduction of hydrophilic groups such as polyethylene glycol and polyether on the fluorocarbon-based chain To make it hydrophilic, the introduction of cross-linking groups can make it react with fiber or cross-linking agent to improve the durability of the finished product. Therefore, we choose fluorine-containing easy-to-decontaminate finishing agent: Ciba refined OIEOPHOBOL. PH = 5-8, it has little effect on the shade of cotton whitening fabric, but it has more obvious influence on the shade of dispersed and reactive dyes. Considering various factors and customer requirements for indicators, we chose ZSR50g / l, 160 ℃, 2 minutes as the process conditions of cart production.
Fabric selection
T40 / C6020Ñ…14 + 98Ñ…56 + 67.5 "twill (black).
Analysis of color fastness index
Through the comparison and analysis of the two processes, it can be seen that the color fastness index of the black dyed by the dispersion / reduction process is significantly better than the dispersion / reactive dyeing process. In order to meet the customer's requirements for the color fastness index, we use the dispersion / reduction two-bath dyeing process. Japan Mingcheng Chemical easy detergent SRM-65 process condition selection test.
analysis
Japan's Mingcheng Chemical Easy Decontamination Finishing Agent SRM-65 is a hydrophilic easy decontamination finishing agent. It is less resistant to oil staining in the air than Ciba ZSR, but the oil stain on the fabric in water is easy to wash. Comprehensively considering the influence of various factors such as concentration, temperature, time, etc., we choose SRM-6560g / l, 180 ℃, 40S as the production process conditions of the cart. The product has been tested by the customer to reach the American standard level 3 or above, and other color fastness indicators are also All meet customer requirements. Note: Before the easy decontamination and finishing, all kinds of surfactants on the fabric, as well as the softener on the material tank, rolling groove and guide cloth must be removed to avoid the reduction of the finishing effect. The easy decontamination and finishing has a significant effect on the color of the finished product, and it should be prevented in advance during production.
The polyester-cotton fabric has greatly improved the grade and added value of the product after easy decontamination and finishing, and also brought great convenience to people's wearing, so it is loved by people. Our products sorted by Ciba ZSR are all qualified after testing and hang tags, and the indicators of the sorted products fully meet the requirements of customers. So far, it has produced nearly one million meters of easy-to-decontaminate products and achieved good economic benefits.
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