| Composite melt spinning because of its "high-strength, wear resistance, excellentshielding performance" characteristics, has been a hot disposable hygiene productsand filtration area. In the current nonwoven market, the health and medical aspects ofthe composite nonwovens demand more and more and the competition betweenenterprises is more and more fierce. Continuously improve product quality, reduceproduction cost, expand the market, obtain the maximum profit, which is the drivingforce of the market, but also the basic principle of enterprise competition. This paperis mainly on how to improve the performance for health and medical aspects of meltspinning composite products (mechanical properties, softness and barrier properties)and save the costs of production have become the main subject of related research.First of all, the core-sheath bicomponent polyester/polyolefin meltblown andspunbond composite solutions has been proposed based on the domestic and foreignrelevant researches melt spinning composite molding. On the one hand, it is to use thelow-melting heat-bonding of sheath melt spun complex principles to improve theproduct softness and strength; on the other hand, the difference between the price andthe melting point of sheath and core raw material can save cost and energyconsumption. To achieve this goal, the efficiency and stability of productionequipment, advanced technology and flexibility is the key factor that should not beunderestimated. By studying the influence of equipment on the web forming, single screw extruder for PE extrusion, twin-screw extruder for PP and PET extrusion,meltspinning piping distribution box body, ratio of length to diameter4and3.5mrectangular spinneret, bilateral blowing cooling, positive pressure wide slit air draftand room structure of hot air bonding production system are determined.Secondly, it is to use innovative online turnover net composite technology forenhancing the barrier properties of products and saving energy, Select the straight intothe net and turnover into a network of networks of three different surface density(13g/m2,18g/m2,24g/m2)of the sample to test the performance of their permeability,mechanical properties and pore size. The results show that the average pore sizes andthe permeability decreased, permeability enhanced, fracture strength increased byturning into a network of network technology; through the study of suction fan of netcurtain, drawn that the energy consumption is reduced by about30%and greatlysaves energy consumption after turning over the net technology.Finally, the surface density of PE/PP60g/m2sheath core bicomponent SMScomposite and single component SMS composite material properties (tensile strength,softness, pore size, permeability, hydrostatic pressure) are compared and analyzed.The results show that, PE/PP sheath core bicomponent SMS nonwoven compositesoftness, hydrostatic pressure, the performance of filtration performance are betterthan the single component SMS nonwoven composite materials; the air permeabilityand filtration resistance than single component SMS nonwoven composites areslightly worse; two samples of spunbond and meltblown fiber fineness are not much.Therefore, the sheath-core bicomponent SMS composite materials are morecompetitive in medical and health, outdoor protection, filtering applications.In this paper, the sheath-core type polyester spunbond meltblown/polyolefincomposite production line equipment system characteristics, structure and mechanismare detailed introduced combining the analysis of product performance and theproduction of energy consumption. The sheath core bicomponent spunbondtechnology and self-developed two-component SMS production line has a certainsignificance. |
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