The shrinkage-controllable copolyester fully stretched direct-spun ultrafine fiber was successfully produced in China
The “Application and Industrialization of Key Technologies for Superfine Direct Spinning of Fully Stretched Copolyester Fully Drawn Yarns with Controllable Shrinkage and Its Industrialization” has brought my country’s research in the field of chemical fiber technology refinement to a new level. As another independent research and development project in the field of new materials in my country, it was led by Professor Dai Lixing of Suzhou University and jointly completed the research and development in cooperation with Jiangsu Xinmin Fabric Technology Co., Ltd.
Dai Lixing said that microfiber fabrics are luxurious, elegant and rich, and have long attracted the attention of the global fabric industry. The direct spinning method is an energy-saving, emission-reducing, low-cost, high-quality microfiber manufacturing new technology. It is also one of the ideal raw materials for weaving high-end fabrics. Polyester with different shrinkage rates is an important component of differentiated synthetic fibers. The shrinkage rate of shrinkable polyester produced by physical methods will decrease after being left for a period of time. Therefore, to obtain a stable shrinkage rate, chemical methods are an effective method.
Direct spinning method has simple process and low cost
Moderator: Domestic and foreign companies have been exploring how to better prepare ultrafine fibers. Compared with conventional preparation methods, what are the advantages of direct spinning?
Dai Lixing: The shrinkage of fibers is an important function that affects the performance and style of fiber wear. Different shrinkages have particularly different characteristics and application fields, so the production of ultra-fine fibers with controllable shrinkage is of great practical significance.
The direct spinning method to prepare ultra-fine fully drawn yarn is to directly form ultra-fine fibers through micropores on a conventional FDY spinning machine. The process is simple, the production cost is low, energy-saving and environmentally friendly, but the fiber-forming process of direct spinning to produce ultra-fine fibers is Spinnability, cooling technology during melt spinning, fiber breakage and prevention of lint are the difficulties in production control. Compared with the lamination method of superfine wire, the direct method of superfine wire production produces 300kg less waste per ton of wire, saving 5,100 yuan per ton; it also does not need to use solvents to dissolve the matrix, and uses 40 tons less solvent per ton, which saves water. 39.2 tons, saving 0.8 tons of sodium hydroxide. It can also be used in conjunction with other fibers that are not resistant to solvents or alkali (such as wool, silk, etc.), which is incomparable to the lamination method. Therefore, as one of the production methods of ultrafine fibers, the direct spinning method will continue to be developed and promoted based on the continuous advancement of technology.
Moderator: The fields of application of multifunctional laminated fibers are becoming more and more extensive, and the research on ultrafine fibers has always been a concern in the industry. The shrinkage controllable copolyester fully drawn yarn direct spinning superfine project What’s the overall situation like?
Dai Lixing: The raw materials used in the shrinkage controllable copolyester fully drawn yarn direct spinning ultra-fine project use terephthalic acid and ethylene glycol as the basic components, and isophthalic acid and polyethylene glycol as the copolymer group The four-component copolyester mainly controls fiber shrinkage through changes in copolymer components. It is difficult to directly form ultrafine fibers through micropores on a conventional FDY spinning machine. This project uses a rectifier to regulate the fiber shrinkage CV value to stabilize fiber shrinkage, adopts three hot roller stretching, and accurately controls the spinning process to achieve the goal with less Put into production of controllable shrinkage copolyester fully drawn yarn (FDY) ultrafine fiber, so that the total fineness reaches 20dtex~30dtex, or the single fiber fineness is 0.3dtex~0.5dtex, with a shrinkage rate of 15%~70 Adjustable between %.
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