Our discussion focuses on how these measurements provide insight into fiber formation during melt blowing.
As the performance properties of meltblown nonwovens are mainly determined by the fiber diameter and diameter distribution, this study focused on
This effect of combined forces results in a variation of filament diameters along the filaments, so the measured filament diameter distribution is relatively broad. Melt blown fabrics are mainly used for
Volume 6, Issue 1, Fall2008 Overview and Analysis of the Meltblown Process and Parameters Kathryn C. Dutton, Graduate Student North Carolina State University
Melt blowing is a conventional fabrication method of micro- and nanofibers where a polymer melt is extruded through small nozzles surrounded by high speed blowing gas. The randomly deposited fibers form a nonwoven sheet product applicable for filtration, sorbents, apparels and drug delivery systems. The substantial benefits of melt blowing are simplicity, high specific productivity and solvent-free operation. Choosing an appropriate combination of polymers with optimized rheological and surface pro
Abstract A polymer air-drawing model of Polybutylene Terephthalate (PBT) melt-blown nonwovens has been established. The predicted fiber diameter coincides with the experimental data.
Fiber diameter distributions were demonstrated to be well described by log-normal functions regardless of the average fiber diameter suggesting that the underlying
The inset die is often used to produce polymeric fibers in the melt blowing process. The air jet flow field model for the dual slot inset die is established. The flow field model is solved by using
Average fiber diameter data for meltblown webs has been previously available in the literature, and is incorporated, here, for purposes of comparison and analysis of the observed fiber diameter
As the performance properties of meltblown nonwovens are mainly determined by the fiber diameter and diameter distribution, this study focused on these two characteristics considering
Meltblowing technology is one of the most economical ways to produce fine fiber webs. Properties and quality of web, fiber size, and fiber diameter distributions in the meltblown process result from
Fiber diameter distributions were demonstrated to be well described by log-normal functions regardless of the average fiber diameter suggesting that the underlying mechanisms which
Tan et al. studied an initial and simplified model of melt blowing which included the influence of viscoelasticity and focused on how viscoelasticity affected the average fiber diameter at different air
effect on these parameters when polymer rheology is modified by molecular weight and temperature. In the following, PPB has been used to investigate the effect of melt rheology on fiber diameter and
These rheological parameters influence the average diameter (dav) and the distribution of diameters (coefficient of variation, CV) of meltblown fibers in different ways.
The predicted fiber diameters tally well with the experimental data. The effects of the processing parameters on the fiber diameters are further investigated in this paper.
This work summarizes the current state of knowledge in the area of meltblown technology for production of polymeric nonwovens with specific attention to utilize
Fiber diameter and its distribution are the fundamental parameters affecting the performance of melt-blown nonwoven materials. This paper proposes a new method to measure
diameter of 66 nm after washing. Soltani and Macosko produced nanofibers with a record low average fiber diameter of 36 nm (see Figure 7) by islands-in-the-sea method utilizing low viscosity
The present work explored the effect of air-slot width on the fiber diameter and diameter evenness in flush sharp-die melt blowing. The airflow in different die melt blowing was first numerically simulated
The melt-blowing process involves high velocity airflow and fiber motion, which have a significant effect on fiber attenuation. In this paper, the
Morphology, structure, fiber diameter, and pore size of melt-blown nonwovens. SEM images of melt-blown nonwovens after various heat treatment conditions: (a)
These rheological parameters influence the average diameter (dav) and the distribution of diameters (coefficient of variation, CV) of meltblown fibers in different ways.
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