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Cross non woven fabric/ Cambrella Fabric

The main factors influencing SMS non-woven blocking performance

by:Sunshine     2020-09-24
The main factors influencing the SMS non-woven blocking performance is as follows: 1, product: quantitative products ( g/㎡) , the greater the proportion or melt-blown fiber screen layer, the greater the hydrostatic pressure is higher, but the product strength will decline, the raw material cost increase, the more energy consumption, the cost of production is raised. 2, temperature, the higher the temperature of the melt and the draft, the easier the melt trickle draft for fine fine, the smaller the diameter of the fiber, the product the smaller the average pore diameter, the higher the hydrostatic pressure. 3, DCD of melt-blown system: the size of the receive distance DCD fiber drawing, cooling and density of the products. DCD is small, the product of good uniformity, high density, good blocking performance, high hydrostatic pressure, permeability is poor; DCD is larger, the product of poor uniformity, and silk, low density, blocking performance is poor, still water, lower permeability is good, feel is good. DCD has a best value, generally between 100 ~ 200 mm. 4, melt flow or spinning pump speed: the diameter of the fiber and the melt flow rate, is proportional to the spinning pump speed, and drafting the wind flow, Speed) Is inversely proportional to. In the production of the same specifications of the products, reduce the speed of the production line can improve the barrier property of the product, which production is low, the products have high hydrostatic pressure, this is frequently used in the production process of technological measures. With change of melt flow and the spinning pump speed, or the method of production, cut off control product performance, is essentially change the flow of the melt spinneret hole. 5, the density of spinneret hole: using high density spinneret hole for production, products of the hydrostatic pressure than using lower spinneret hole density products is higher. Its essence is in the same spinning pump speed, high hole density smaller single-hole flow of spinneret, fiber is fine. At present, the domestic general melt-blown system of hole density in 35 ~ 42 inches, up to 50 / inch; That is equivalent to 1378 ~ 1654 / m, the highest is 1969 / m. 6, spun-bonded fabric uniformity and fiber fineness: the homogeneous degree of the spun-bonded fabric had a great influence on product blocking performance, evenness, hydrostatic pressure distribution is discrete; The fiber fineness decided to fabric cover and average pore size, the smaller the fiber diameter, product performance will be better. 7, finishing processing: the product when offline cutting, if improperly tension control of winding tension can destroy the structure of the product and the blocking performance. Similarly, finishing on the product, cut off will also affect the product performance, such as in the antistatic finishing, such as finishing agent polluted, the spray layer will result in the blocking performance degradation or even disappear. Products finishing process in addition to affect the product of hydrostatic pressure, will also affect the physical properties of the product, such as breaking strength decreased, elongation decreases, feel is poor. 8, raw material: material flow characteristics will affect the quality of the products. The higher MFI, the melt flow rate, the better, the easier the melt trickle drafting, blocking the better performance of products, is currently the commonly used polypropylene ( PP) Raw material of MFI between 1200 ~ 1500. 9, environment: melt-blown fiber network depend on waste heat from cement become melt-blown fabric, the temperature of the environment will affect the cooling effect, the lower the temperature, the cooling of melt-blown cloth faster, the better the quality of the product, especially not prone to 'crystal'. For melt-blown system, therefore, in the winter or products will be in the summer or in the evening in the daytime products is better. Some spray melting system equipped with cooling device, the biggest advantage is that the stable environmental conditions, rarely appears crystal point, improve the product quality control.
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