On July 21, 2025, the China National Textile and Apparel Council (CNTAC) organized an appraisal meeting in Suzhou, Jiangsu Province, for the scientific and technological achievement of the project "Key Technology R&D and Application of Air-Jet Vortex Spinning Slub Yarn". This project was jointly completed by Wujiang Jingyi Special Fiber Co., Ltd., Donghua University, Jiangnan University, Hangzhou Qingyuansheng Textile Technology Co., Ltd., and Suzhou Jingzheng New Material Technology Co., Ltd. The appraisal committee concluded that the project's achievements have reached the internationally leading level. A brief introduction to the project's research findings is as follows:

I. Project Research BackgroundOn July 21, 2025, the China National Textile and Apparel Council (CNTAC) organized an appraisal meeting in Suzhou, Jiangsu Province, for the scientific and technological achievement of the project "Key Technology R&D and Application of Air-Jet Vortex Spinning Slub Yarn". This project was jointly completed by Wujiang Jingyi Special Fiber Co., Ltd., Donghua University, Jiangnan University, Hangzhou Qingyuansheng Textile Technology Co., Ltd., and Suzhou Jingzheng New Material Technology Co., Ltd. The appraisal committee concluded that the project's achievements have reached the internationally leading level. A brief introduction to the project's research findings is as follows:

 Air-jet vortex spinning, as one of the fastest-growing new spinning technologies in recent years, has gradually gained market recognition and promotion due to its advantages of high speed, short process, small footprint, and low labor requirements. Statistics show that the installed base of air-jet vortex spinning equipment in China has exceeded 450,000 spindles. Although the range of suitable raw materials and yarn counts for air-jet vortex spinning continues to expand, and significant progress has been made in functional yarns, colored spun yarns, multi-component blended yarns, and core-spun yarns, producing slub yarns on air-jet vortex spinning equipment faced technical bottlenecks and had not yet achieved industrialization. Against this backdrop, the project proposed an entirely new technical route for air-jet vortex spinning slub yarn, opening up a new development track for air-jet vortex spinning.

II. Main Innovations of the Project

1. Developed a dedicated core yarn for air-jet vortex spinning slub yarn. By designing key components such as a traversing mechanism, a bulking mechanism, and a dedicated nozzle, a core yarn forming device was developed. Through the coordinated action of mechanisms and the control system, effective control of tension and morphology during the core yarn preparation process was achieved.

2. Developed integrated differential carding and drawing technology. Researched high cylinder-taker-in linear speed ratio carding technology, effectively transferring fibers, reducing neps and short fibers; designed novel drawing technology and processes specifically to effectively balance reducing neps, improving fiber straightness, and enhancing yarn evenness.

Developed dedicated spinning spindles and nozzles for air-jet vortex spinning slub yarn. Designed and developed specially sized spindles and nozzles, increasing compressed air jet volume to enhance wrapping and twisting effects; designed and adopted dual conditioning technology and dedicated devices, improving yarn quality.

Slub yarn produced by air-jet vortex spinning and fabric made from it.

III. Project Industrialization and Application Status

The project has achieved industrial application, forming an annual production capacity of 9,600 tons of air-jet vortex spinning slub yarn. It has successfully developed 12 series of air-jet vortex spinning slub yarn products and created over 10 series of fabrics. Fabrics made from the project's yarns have unique styles and have been used in end products like apparel. Customer feedback is positive, indicating good economic and social benefits.

 Fashion garments made from air-jet vortex spinning slub yarn.

IV. Introduction to Main Project Completion Units

• Wujiang Jingyi Special Fiber Co., Ltd. is the Chairman Unit of the Air-Jet Vortex Spinning      Branch of the China Cotton Textile Association and a National High-Tech      Enterprise. It holds honors including Jiangsu Provincial Enterprise      Technology Center, Postdoctoral Research Station, Air-Jet Vortex Spinning      Differentiated Yarn Product Development Base, Textile Industry Vortex      Spinning Technology Innovation Center, China Air-Jet Vortex Spinning      Characteristic Product Production Base, National Green Factory, and      National 5G Factory. It has been recognized as an Enterprise with      Outstanding Contribution to Technological Progress (China Cotton Textile      Association) and ranked No. 2 among China's Top 10 Air-Jet Vortex Spinning      Yarn Product Revenue Enterprises (China Cotton Textile Association). The      company emphasizes industry-academia-research collaboration and      technological innovation, maintaining extensive cooperation with domestic      universities like Donghua University, Jiangnan University, and Soochow      University. It leads in the R&D and production of high-quality,      differentiated, and functional air-jet vortex spinning yarns. In 2021, it      won the China Textile Industry Federation (CTIF) Science and Technology      Progress Second Prize. In 2024, its ultra-fine count air-jet vortex      spinning yarn was appraised by CTIF as internationally advanced. Wujiang      Jingyi Special Fiber Co., Ltd. is committed to leveraging its advantages,      fully utilizing various resources, seeking domestic and international      cooperation, building a high-tech spinning industry cluster, and striving      to create a world-class air-jet vortex spinning yarn production and      manufacturing base.

• Donghua University is a      national key comprehensive university directly under the Ministry of      Education, a national "Double First-Class" and "211      Project" university. It is selected into national programs including      the "2011 Plan", "111 Plan", the Excellent Engineer      Education and Training Program, and the National College Student      Innovation Experiment Program. It is among the first batch of institutions      authorized to confer doctoral degrees in China. It currently has 2      national "Double First-Class" construction disciplines and 1      Shanghai Class Ι Peak Discipline. It possesses 1 National Key Laboratory,      1 National Engineering Technology Research Center, 23      provincial/ministerial level key research platforms, 2 national      intellectual introduction bases, and a National University Science Park.      The university adheres to the school-running characteristic of integrating      industry, academia, research, and application, undertakes major national      research tasks, and supports national strategies such as industrial      transformation and upgrading and the development of emerging industries.      It promotes industry-academia-research cooperation and achievement      transformation, jointly establishing 71 innovation incubation platforms to      facilitate the implementation of major projects in specialized fields. It      effectively serves the national economic and social development strategy      and the national strategy for integrated development of the Yangtze River      Delta.

• Jiangnan University, located in      Wuxi, Jiangsu Province, is a national key university directly under the      Ministry of Education of China, jointly established by the Ministry of      Education and the Jiangsu Provincial Government. It is designated as a      national "Double First-Class" university, a "211      Project" university, and a "985 Project Innovation Platform for      Advantageous Disciplines" university. It is selected into national      programs including the "111 Plan", "2011 Plan", the      Excellent Engineer Education and Training Program, the Excellent      Agriculture and Forestry Talent Education and Training Program, the      National High-Level University Postgraduate Student Program, the National      College Student Innovation Experiment Program, the National College      Student Innovation and Entrepreneurship Training Program, and the National      New Engineering Research and Practice Project. It is a member of the      High-Level Industry-Specific University Quality Resource Sharing Alliance      and the "Belt and Road" University Food Education Technology      Alliance. It is also a National College Student Cultural Quality Education      Base and one of the first batch of National Bases for the Transfer and      Transformation of Scientific and Technological Achievements in Higher      Education Institutions.

• Hangzhou Qingyuansheng Textile Technology Co., Ltd., founded in 2014, is an innovative technology enterprise      integrating fiber R&D, yarn development, and fabric design. Upholding      the product development philosophy of "Artistic Design +      Craftsmanship Spirit", the company strives to expand the application      scenarios of textile products across multiple fields and enhance product      grade or taste to maintain a competitive edge in the fierce market. In      recent years, to adapt to diverse market demands, the company has      developed distinctive fabrics and garments by combining yarns with      different properties and forms with varied fabric designs. These products      have been well received by consumers and have achieved good economic      benefits.

• Suzhou Jingzheng New Material Technology Co., Ltd., established in 2021, is a National High-Tech Enterprise,      recognized as a "Specialized, Refined, Unique, and Innovative"      (SRUI) enterprise and a Gazelle Enterprise. It primarily focuses on the      R&D and production of high-end differentiated air-jet vortex spinning      yarns. Since its inception, adhering to the development philosophy of      "Technology, Green, Fashion, Health", the company has      continuously increased its innovation efforts. It has developed over 20      new yarn products, applied for more than 40 patents, and obtained over 20      authorized invention patents and utility model patents.