Four inspirations from the production process of spunbond and meltblown nonwovens

In recent years, China Textile Science and Technology Co., Ltd. has made great achievements in the research and development of spunbonded and meltblown non-woven fabric production technology. Although this team has a small number of people, it produces several spunbond and meltblown complete production lines every year. While supplying domestic demand, it also exports to more than a dozen countries and regions overseas. I have a lot of feelings after seeing their production sites, and I think there are many characteristics that are worth learning from the peers. One of the characteristics of 　　 is to seize the leading products to form its own series of products. It is impossible for any company to get involved in all non-woven fabric technology, and can only choose one or two to give play to its advantages. This is the case for China Textile Technology. It has established its own advantages in spunbonding and meltblown complete equipment, relying on this advantage to occupy the market and serve the market. And by virtue of its own process technology and complete equipment advantages, it has a high reputation in the domestic and foreign markets. Chinatex Technology's domestic users are in many provinces, cities and regions. In addition, there are successful projects in Turkey, India, South Korea, Egypt, Saudi Arabia, Indonesia, Russia, and Argentina in South America, and they have been praised by users. The second feature of 　　 is to develop and produce products that meet market demand. Non-woven fabrics are an emerging industry with broad market demand, and its technology and equipment must adapt to market demands. At present, the whole set of spunbond and meltblown process technology and equipment has formed a series, the machine width ranges from 1.6 meters to 3.2 meters, and the weight of the finished product ranges from 10 grams/square meter to 200 grams/square meter to 400 grams/square meter. Spinning speed depends on raw materials, processes and products. There are everything for different purposes such as medical treatment, hygiene, packaging, protection, building insulation, transportation and so on. The raw material of spunbond and meltblown non-woven fabrics is polyester chips, which can be compounded in'sandwich' or multiple superimposed forms. There are single-layer spunbond or meltblown processes, and spunbond and meltblown processes are combined. There are spunbond plus dual-mold meltblown plus spunbond technology, and 2 spunbond plus 3 meltblown, plus a spunbond, a total of 6 die heads of multiple composite types, forming Diversified development models. The products produced have different uses, and the fiber deniers of spunbonded and meltblown fibers are also different. With a series of products that can adapt to different varieties, users have a choice. In addition, Chinatex Technology Co., Ltd. can also tailor clothes to suit users' special requirements, and produce special configurations that suit users' needs.　　The third feature is to master key core technologies. The spunbond and meltblown process flow is relatively short, and the process flow must be completed in an instant, thus increasing the difficulty of the process technology. In this whole production line, there are many key core technologies. For example, there are many difficulties in the design, manufacture and final assembly and debugging of the die. However, through years of practice, China Textile Technology has mastered the core technology of key parts, components and parts in the process of melt pipes to hanger shapes, distribution, spinning, and netting. Of course, some key components also need to be produced by cooperative supporting units. However, no matter whether it is produced by itself or matched by a cooperative unit, there are strict quality control measures, and the design requirements and product standards must be met to ensure the overall technological level of the project. The fourth feature of 　　 is to have a complete set of independent and innovative spunbond and meltblown proprietary technologies. Spunbond and meltblown production lines have many technological parameters that are invisible and intangible. For example, the pressure and flow rate in spinning, the temperature, wind pressure, flow rate of hot air, the scientific calculation of polymer materials, fibers, fineness crystallization and spinning speed, etc., China Textile Technology has accumulated a lot of scientific data, and write Into process technical documents, in the process of single machine forming, process forming and engineering complete sets, it has formed its own unique technical document system, such as forming a complete project operation book, installation work book, maintenance work book, etc. These workbooks have clear responsibility requirements from assistant technologists to chief technologists to project managers, and they are implemented in people.　　Equipment is the carrier of the process, and only through process production can the technical level of the equipment be verified. The successful practice of the project undertaken by China Textile Technology has proved that the non-woven fabric produced by the process and the complete set of engineering can meet the engineering requirements in terms of crystal, fiber denier, uniformity and unit weight. The physical indicators such as mass deviation per unit area, coefficient of variation, transverse and longitudinal fracture, strength, and antistatic water pressure of the produced products can meet user requirements.