The important reason for the rapid development of spunbonded process is that it uses synthetic polymers as raw materials. In the process of polymer spinning, continuous filaments are spun into webs and then directly bonded to make nonwovens. The manufacturing method is very simple and fast. Compared with dry nonwoven processing technology, it saves a series of complicated intermediate processes such as fiber crimping, cutting, packaging, transportation, mixing and carding. The most remarkable effect of this continuous and large-scale production is that spunbonded products have low cost, stable quality and strong market competitiveness, and can enter the market field of disposable and durable textiles, paper and films. Secondly, because spunbonded nonwovens use polypropylene as the main raw material, it has many advantages in price, processing technology and production cost, which also greatly promotes the sustainable development of spunbonded nonwovens industry. In addition, the mechanical properties of spunbonded nonwovens are excellent, and its tensile strength, elongation at break, tear strength and other indicators are better than dry, wet and melt-blown nonwovens. Especially in recent years, the rapid development of spunbonded nonwovens in production line scale, technical equipment and product market development has greatly expanded the application field of spunbonded nonwovens.

The biggest difference between spunbonded production process and chemical fiber spinning is the adoption of airflow drafting and direct netting, so spunbonded drafting has become the technical core issue. In the past, mechanical drafting was used, and the fiber monofilament was thick and the netting was uneven. At present, air drafting technology has been adopted in spunbonded production equipment all over the world. Due to the different air draft methods, there are three different forms of spunbonded production line, namely tube draft, wide slit draft and narrow slit draft.

Spunbonded nonwovens technology has always been to improve the production line capacity, solve the problems of uniformity, coverage and rough feel of nonwovens, so as to improve the strength, softness, uniformity, comfort and hygroscopicity of spunbonded nonwovens.

Fine grain spunbonded nonwovens can directly improve the softness and comfort of spunbonded nonwovens. However, there are technical bottlenecks in fine-grained spunbonded nonwovens. For example, fine-grained spunbonded nonwovens can increase the number of fibers per unit area, increase the "bonding points" between fibers, make products more uniform and improve coverage.