Modeling the melt blowing of viscoelastic materials

Zhou, Chunfeng; Tan, Dawud H.; Janakiraman, Arun; Kumar, Satish

doi:10.1016/j.ces.2011.05.051

Cited by 37 publications

(27 citation statements)

References 35 publications

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“…Compared with electrospinning, melt blowing has been in wide commercial use and takes the advantages of higher production rate and lower cost. There have been important advances in the modeling of melt blowing during the past decade, however, to our knowledge, no report on the fabrication of helical fibers using melt blowing technique has been found in the literature. Although bicomponent melt blowing technique has been developed in this recent decade, previous researchers mainly focused on the splitting process for melt‐blown bicomponent fibers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of helical microfibers from melt blown polymer blends

Huang

Meng

et al. 2018

J Polym Sci B Polym Phys

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Helical fibers in micro/nanoscale resembling plant tendrils have been of increasing interest due to their unique characteristics. Fabrication of helical microfibers from polymer blends using melt blowing technique is reported in this study. An elastomeric and a stiff polymer are chosen as the raw materials, and a designed swirl-die melt-blowing device is used to prepare the microfibrous nonwovens. Focusing on the interfacial interaction between the polymer components induced by the polymer structure and intrinsic properties, airflow field characteristics, and processing parameters, we explore the effects of various parameters on helical fiber formation.Differential scanning calorimeter is employed to examine the rigidity of polymer chains, and the three-dimensional airflow field simulation is carried out to reveal the airflow field characteristics. This work can provide a promising technique for producing stretchable microfibrous materials which have potential applications in field such as filtration materials and oil sorbents.

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Section: Introductionmentioning

confidence: 99%

Fabrication of helical microfibers from melt blown polymer blends

Huang

Meng

et al. 2018

J Polym Sci B Polym Phys

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“…2a) [17], illustrating that the air flow field in melt blowing has obvious characteristic of turbulence. Research group of Kumar and Bates [18][19][20][21][22] has done some theoretical and experimental work on the fiber formation, onset of fiber whipping and fiber breakup as well as utilizing an innovative Laval nozzle in melt blowing, their work had a significant contribution to the research on melt blowing, and they also mentioned that, in melt blowing, whipping-like motion of fiber was due to turbulent air [20]. Furthermore, the fiber motion in melt blowing can indirectly reflects the turbulent characteristic of air flow field.…”

Section: Introductionmentioning

confidence: 99%

Turbulent air flow field in slot-die melt blowing for manufacturing microfibrous nonwoven materials

et al. 2018

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Melt blowing is an industrial approach for producing microfibrous nonwoven materials utilizing high-speed air to attenuate polymer melt. The melt-blowing air flow field which is widely believed to be turbulence determines the process of fiber formation. In this study, the turbulent air flow field in slot-die melt blowing was experimental measured by hot-wire anemometer. The fluctuations of air velocity and temperature, the mean velocity and mean temperature were measured and analyzed; moreover, the relationship between turbulent air flow field and fiber formation in melt blowing was discussed and predicted. In the last part of this paper, the coupling effect of air temperature and velocity was studied tentatively, results showed that air temperature not only had an enhanced effect on velocity, but contributed to the fluctuation of velocity. This work shows that the fluctuating characteristics of air velocity and temperature have dominant effect on fiber motion and the evenness of fiber diameter.

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“…In this work, we adopted k – ε standard model for computation. Below are some of the details, values of the constants of standard k – ε model are C μ = 0.09, C ε 1 = 1.44, C ε2 = 1.92 . The turbulent Prandtl numbers are as follows: σ t = 0.9, σ k = 1.0, σ ε = 1.3 [23–25], where σ t , σ k , and σ ε are Prandtl numbers of turbulence, turbulent kinetic energy and turbulent dissipation rate, respectively.…”

Section: Numerical Simulation Of the Air Jet Flow Field Mathematical mentioning

confidence: 99%

Experimental study and numerical simulation the air jet flow field of a dual slot sharp blunt die in the melt blowing nonwoven process

2016

Polymer Engineering & Sci

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In this work, the physical model of a polymer in a melt blowing process is established and solved by introducing the numerical computation results of the air jet flow field of the dual slot sharp inset die. The influence of the melt blowing processing parameters and the die design parameters on the fiber diameter is also studied. A lower polymer throughput rate, higher polymer melt initial temperature, higher air initial temperature, higher air initial velocity, smaller angle between slot and axis of the spinneret, smaller width of the die head, and larger width of the slot can all produce finer fibers. At the same time, the air jet flow field model of the dual slot sharp inset die of polypropylene polymer nonwovens fabrics in melt blowing process was also established. The air jet flow field model was solved by using the finite difference method. The computational simulation results of the distributions of the z-components of air temperature and air velocity along the spinline during melt blowing process are in accordance with the experimental data. The air drawing model of melt blowing process was simulated by means of the numerical simulation results of the air jet flow field. The predicted fiber diameter agree with the experimental data. The effects of the air initial velocity and air initial temperature on the fiber diameter were studied and discussed. The results demonstrate that a higher air initial velocity and a higher air initial temperature are beneficial to the air drawing of the polymer melt and thus to reduced fiber diameter. The results show the great potential of this research for computer assisted design in melt blowing nonwoven process and technology. POLYM. ENG. SCI.,

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Modeling the melt blowing of viscoelastic materials

Cited by 37 publications

References 35 publications

Fabrication of helical microfibers from melt blown polymer blends

Fabrication of helical microfibers from melt blown polymer blends

Turbulent air flow field in slot-die melt blowing for manufacturing microfibrous nonwoven materials

Experimental study and numerical simulation the air jet flow field of a dual slot sharp blunt die in the melt blowing nonwoven process

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