SMS non-woven melt-blown composite technology advantages and disadvantages of online

Melt-blown composite definition of melt-blown composite online online is in melt-blown rolling machine, two production line configuration to uncoiling S cloth, two layers of cloth clamping M S, into the mill of hot rolling bonding a method of SMS nonwovens production. Rolling machine is after the first uncoiling of S cloth evenly spread on a net curtain, melt-blown equipment production of M onto the S cloth, rolling machine to cover the second uncoiling S cloth, S on the second floor cloth clamping M glue into the hot rolling mill, forming the SMS. Such production line production process a combination of online and offline the characteristics of the composite, composite, the advantages of both online and offline compound, the advantages of production technology of SMS is suitable for China's national conditions. The advantages of online melt-blown composite melt-blown composite process has the advantages of online the following respects. ( 1) Small investment. Article 1 the import 3. 2 m melt-blown production line equipped with rolling machine, two investment about 80 million yuan, is 1/3 of SMS composite production line, online ( 2) Product variety. This production line production of single block melt-blown material, melt-blown filter material, hot-rolled industrial wiping cloth, SM filtering material, SMS, special function of SMS composite nonwoven fabric cloth. In welding nozzle and the method of spun-bonded nonwoven fabric, between rolling machine of the second design are staple joining device, can add wood pulp or viscose staple fiber, the preparation of high water absorption and high filtering effect of special SMS composite material, carbon fiber can be added or activated carbon particles, even super water absorption polymer and so on, in the preparation of special features of composite fabric. ( 3) High output. ( 4) Can produce g on 30 g/m2 of the following products, the minimum products gram can reach 20 g/m2, and can produce online composite type thick SMS, gram biggest can reach 150 g/m2, and the yield is very high. ( 5) Can flexibly according to the customer's physical performance requirements, adjust the gram of melt-blown cloth, make the product has good air permeability, filtering performance and ability to resist hydrostatic pressure. In this production line, to fine-tune S cloth can, in order to better improve the performance of products. ( 6) This production line with online adjust melt-blown, without having to worry about like offline composite, due to the powerful questions of melt-blown fabric composite. In the spray layer under the condition of two layer of S, can do 2 ~ 3 g/m2, is advantageous to the enterprise competition in the market. ( 7) The line is not only have adjusted net curtain and the distance between the die head ( 论证 Function, but also can adjust the net curtain with the function of the Angle between the die, to improve the barrier property of melt-blown cloth and uniformity. Especially in more than 40 ~ 60 g/m2, and SMS non-woven fabrics for protective clothing, on the one hand, can avoid online composite by adding melt-blown reduces production S shortcomings, on the other hand, overcoming the two footwork hot rolling pressure and high temperature caused the disadvantages, poor permeability, strong feeling, especially suitable for doing 40 ~ 60 g/m2 protective material with SMS non-woven fabrics. ( 8) In the line of melt-blown composite do SMS, due to the melting spray directly onto the layer 1 S, S and M is better, it is not easy to produce SMS stratification. In hot rolling mill on the temperature and pressure selection is flexible, therefore produce SMS feel is good, good permeability, high strength, and because M spray directly to the S cloth, can make up the inhomogeneity of S cloth, better improve the uniformity of the SMS. ( 9) Due to the production line for melt-blown uninterrupted, therefore, can make a very big rolled the S, and don't stop, don't slow down S volume connection technology, thus can continuous high-speed production line, and production of SMS non-woven roll long uniform, in the production of SMS fabric volume, almost no joint, is conducive to the use of the downstream customers. ( 10) In production, because only online melt-blown cloth production, to minimize losses in production, especially in the production of colored SMS, on the one hand, to avoid excessive transition cloth production, on the other hand, is advantageous for the production of color accurate SMS non-woven fabrics. ( 11) This production line installation period is short, fast effect. ( 12) Production of SMS feel is very good, close to the composite products online. The deficiency of melt-blown composite process online melt-blown composite process online deficiency is: due to the effect of S cloth, not production specifications for SMS non-woven fabrics under 20 g/m2, so can't production for sanitary napkin, sanitary pads, baby diapers, etc. Very thin SMS non-woven fabrics. Due to this kind of production process in December 2004 to appear, so the industry experts can be divided into offline compound, I think it is wrong. Such production technology, has the characteristics of both the composite of online and offline the characteristics of the composite, is to learn the essence of the two process routes, with offline composite has very obvious different, it is recommended that domestic experts put the process route as another kind of SMS production process route, in order to facilitate the process route of development.