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The water-soluble non-woven fabric is not only having the desired dissolution temperature and strength, good acid and alkali resistance, heat resistance, and after dissolved in water, tasteless, non-toxic, aqueous solution was colorless and transparent, in a relatively short period of time can be a natural decomposition does not create any pollution to the environment, is a 100% green products. Is the use of a PVA non-woven fabric has the unique properties that can be dissolved in water, the development of the non-woven fabric of the different properties of the water-soluble PVA and broaden the scope of its application development continues. In this paper, we summarize the extensive literature at home and abroad, soluble fiber, and water-soluble non-woven fabric production technology and applications, combined with the needs of society and its prospects, and a brief description of the mechanism of fiber soluble. After the performance of the rheological properties, melting point and degree of crystallinity of the PVA slice, the work provided the basis for the determination of the spinning process. This thesis provides some basis for the development of our water-soluble meltblown nonwovens. Study on the performance of the experimental PVA slice analysis, the following conclusions: (1) PVA for pseudoplastic shear-thinning fluid used in this experiment, PVA melt as the temperature increases, the non-Newtonian index rose , especially in the area of ??220-230 ℃, its rate of rise, which indicates that the temperature in the region a greater impact on the melt flow, increase temperature conducive to improving the melt flowability. (2) analysis, that PVA m.p. 212.5 ° C by differential thermal analyzer. By thermal gravimetric analyzer, that the PVA thermal decomposition temperature was 353.0 ° C. (3) after the number of exploratory experiment, the subject taken by flushing first with the PP to an extruder, such as the PP after extrusion, and then lower the temperature to the PVA spinning temperature of 220-240 ° C, and then placed has been 72 hours of dry PVA slice. Adjust the temperature of the screw three areas and the hot air temperature and pressure, the drum speed, the traverse speed, the receiving distance, and then melt-blow spinning. The structural performance of the meltblown webs were analyzed the following conclusions: (1) hot air temperature and the structural performance of the meltblown webs relationship appropriately raise the temperature of the hot air can significantly reduce the fineness of the fiber, the fiber fineness drop from 75μm to 45μm. Fiber mesh density improved strength is also rising, webs longitudinal strength was significantly greater than the transverse strength. With the rise of the temperature of the hot air, the maximum pore diameter and average pore size of the meltblown PVA hot-rolled non-woven fabric are reduced. With the rise of the temperature of the hot air, spun out by a PVA non-woven fabric of the degree of crystallinity is also increased, the dissolution temperature of the material rises and the lower loss rate of the hot water soluble. (2) With the enhancement of the tensile thermal air pressure, the tensile thermal air pressure and meltblown webs structure-property relationship, the fineness of the fiber network is significantly reduced, the hot-rolled nonwoven fabric of meltblown PVA maximum pore diameter and average pore size with significantly improved tensile thermal air pressure tends to decrease, while the degree of crystallinity of the PVA non-woven fabric is also increased, the dissolution temperature of the material increases, the lower loss rate of the hot water soluble. (3) traversing the layers and the structural performance of the meltblown webs relationship as the number of layers increases, the areal density of the fiber network increase, increase in strength in a certain range of the webs, longitudinal webs strength significantly greater than the transverse strength .
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