The rate at which the molten polymer is extruded through the spinnerets in the melt-blown process plays a significant role in determining the thickness and size of the fibers. This parameter, known as the extrusion rate or throughput, directly affects the diameter and morphology of the resulting fibers. Here's how the Melt blown nonwoven fabric machine extrusion rate impacts the fiber characteristics:

    Extrusion Rate and Fiber Diameter: The extrusion rate is directly proportional to the diameter of the fibers. Higher extrusion rates result in larger fiber diameters, while lower rates produce finer fibers. By adjusting the extrusion rate, manufacturers can control the thickness of the fibers to meet the desired specifications for their application.

    Fiber Morphology: The extrusion rate influences not only the fiber diameter but also the overall morphology of the fibers. At higher extrusion rates, the fibers may have a more pronounced "bead-on-string" structure, with occasional bulges along their length. Lower extrusion rates can lead to smoother and more uniform fibers.

    Fiber Distribution and Density: The extrusion rate also affects the distribution and density of the fibers on the collection surface. Higher rates may result in a denser fabric with more closely packed fibers, while lower rates can lead to a sparser arrangement.

    Production Throughput: The extrusion rate also impacts the overall production throughput of the melt-blown machine. Higher extrusion rates can lead to increased fabric production in a given time, which is beneficial for large-scale manufacturing.

It's important to note that while the extrusion rate is a critical parameter, it needs to be balanced with other process parameters, such as air velocity, temperature, and spinneret design, to achieve the desired fabric characteristics. Achieving the ideal fiber diameter and morphology requires careful optimization of all these parameters in harmony.

Manufacturers must carefully control the extrusion rate to produce melt-blown nonwoven fabric with consistent fiber diameter, uniformity, and overall quality. Precise control of the extrusion rate is crucial for meeting the specific requirements of various applications, such as filtration efficiency, breathability, and barrier performance in medical masks, respirators, and other protective products.