Selection of non-woven material production equipment for health and medical products

Summary of content: Briefly introduce the characteristics and requirements of nonwoven materials for sanitary and medical products, from the fiber structure, spinning process, web consolidation and finishing process, spinning system combination and other factors related to product quality, and the performance of domestic equipment Analyze the domestic and foreign equipment market overview and other aspects, provide reference opinions on equipment selection, and point out that SS, SSS, SSMMS type production lines are currently more mainstream models. 1. The characteristics of non-woven materials for sanitary and medical products 1. Melt-spun web non-woven fabrics and disposable products Melt-spun web non-woven fabrics mainly refer to spunbond, meltblown and spunbond methods / Meltblown / Spunbond (SMS) non-woven fabrics, its applications have penetrated into various fields. In developed countries, the amount of materials used in sanitary and medical products will reach 50% of the total output, and it will still be faster The rate of growth. Due to different application areas, disposable sanitary products (referring to baby diapers, feminine hygiene products, elderly incontinence products, etc.) generally refer to baby diapers. There are many types of medical disposable non-woven fabric products. At present, they mainly refer to medical protective clothing, infectious control supplies, isolation supplies, ward supplies, and operating room supplies. 2. Selection of raw material fibrils At present, domestic spunbonded nonwovens and SMS nonwovens used in sanitary and medical products are basically single-component fibers with a circular cross-section using polypropylene (pp) raw materials. 3. Choosing the spinning drafting process According to the spinning drafting principle, there are mainly wide-slit negative pressure drafting technology, wide-slit negative pressure drafting technology and tubular drafting technology. 4. Fiber web consolidation equipment There are many ways to consolidate fiber webs. In the solution spinning non-woven production line, especially in the SMS production line, the hot rolling mill is the most commonly used equipment. At present, the hot-air consolidation process is used in the two-component spunbond production line, but it has not been widely used. V. Finishing system 1. Online finishing system By adding special additives and adopting the method of 'blending spinningIn addition, the hydrophilic, water-repellent and slippery properties of sanitary products can be achieved through'online finishing'. The'online finishing system' is a system that is installed between the hot rolling mill and the winding machine on the production line. 6. Winding machine and slitting machine Large-scale production lines generally adopt the process of 'large roll diameter, offline slittingThe winding machine is required to be wound with a constant tension and cut horizontally by a serrated knife. The slitting machine runs in an active square and constant tension winding mode, and uses a disc shear knife to cut the product. Avoid 'flash' and 'flocculation7. Multi-spinning system spunbond production line generalization The multi-spinning system spunbond production line mainly refers to two models, SS and SSS. Before 2012, SS was the main model for the production of non-woven materials for sanitary products, and appeared in 2013 After the SSS production line is installed, it is still unable to replace the production capacity of a large number of SS production lines. In the future, the two models will coexist for a long time. Therefore, the'SSS' model is not the'one choice'. 8. Basic overview of SMS production technology and SMS nonwoven production line 1. SMS production technology and SMS nonwoven application SMS is a spunbond (S)/meltblown (M) spunbonded (S) composite nonwoven fabric Shorthand. SMS production technology has and integrates the advantages of spunbond and meltblown nonwovens, achieving'complementary advantages'. Among them, the meltblown layer fiber web has good barrier properties, and the upper and lower two layers of spunbond fiber web can play its protective and reinforcing effects, and the uniformity and covering properties are greatly improved. Therefore, this material composited by multiple layers of fiber nets manufactured by different processes is very suitable for manufacturing medical protective products, and can also be used for manufacturing sanitary products. IX. Comprehensive opinions Based on the market adaptability and competitive advantages of the equipment currently in use, the actual technical level and price differences at home and abroad, in the field of sanitary products, the spunbond system selects domestically made SS with wide slit negative pressure drafting technology. , SSS type production line is feasible, among which some foreign hot rolling mills, winding machines, and slitting machines can be selected to achieve the high speed and high efficiency of the production line. For some companies that consider entering the high-end medical product material market, but also taking into account the production of sanitary product materials, but with limited resources, the domestic SSMMS production line is a 'one machine with multiple functions' model, but it must pay attention to producing two properties For different products, differences in the configuration of equipment (such as hot rolling mills, finishing systems, etc.), workshop environment, etc., can achieve true 'one machine with multiple functions'.