Introduce in detail the production and processing process of non-woven fabrics

The production and processing of polypropylene fiber into various non-woven products usually involves four main processing processes: selection of raw materials, web formation, web reinforcement, and finishing. Generally speaking, polypropylene fiber, polyester fiber, and nylon fiber Various types of fiber raw materials are mixed and processed according to a certain formula ratio, and each production link in the processing process of the non-woven fabric must meet the basic process requirements. Next, the production and processing process of the non-woven fabric will be introduced in detail! 　　 Non-woven Fabric production and processing process: 　　 1. Fiber/raw material selection The fiber/raw material selection is based on the following aspects: cost, processability and final performance requirements of the fiber web. Fiber is the basis of all nonwoven materials. Most natural fibers and chemical fibers can be used for non-woven materials.　　Raw materials also include adhesives and finishing chemicals. Generally, an adhesive is used to bond fibers in the web to obtain a web with a certain strength and complete structure. However, some adhesives can not only be used for bonding, in many cases, they can also be used as finishing agents, such as coating finishing, laminating process and so on. Adhesives are divided into natural total and synthetic adhesives.　　2, forming a web, 　　 refers to the formation of a loose fiber web structure by fibers, which is called web forming. At this time, the strength of the shrinked web is very low, and the fibers in the web can be staple fibers or continuous filaments, depending on the process of forming the web. There are three main types of web-forming processes: dry-laid, wet-laid and polymer extrusion.　　3, fiber web reinforcement 　　 after the fiber web is formed, the loose fibers held by the fiber web are reinforced by related processes to become fiber web reinforcement, which gives the fiber web certain physical and mechanical properties and appearance.　　4. Finishing and forming 　　 Finishing is performed after the web is reinforced. Finishing aims to improve the structure and feel of the product, and sometimes also to change the performance of the product, such as breathability, absorption and protection. Finishing methods can be divided into two categories: mechanical methods and chemical methods. Mechanical post-processing includes wrinkling, calendering, shrinking, perforating, etc. Chemical finishing includes dyeing, printing and functional finishing.　　After finishing, non-woven materials are usually transformed into final products on forming machines, such as polyester non-woven fabrics, flame-retardant non-woven fabrics, needle-blown cotton non-woven fabrics, etc. The forming process generally includes one or more of the following steps: unwinding, slitting, folding, cutting, sewing, disinfection, dipping and packaging. The above is an indispensable link in the entire production and processing flow of non-woven products. Because the processing quality of non-woven fabrics is very demanding, the relevant non-woven industry quality must be followed during the entire production and processing of non-woven fabrics. The standard requires that as long as you follow the correct production and processing process, you can produce non-woven products with superior quality and a variety of styles and colors! Previous: [Industry Focus] What quality requirements must medical non-woven fabrics meet?