Numerical modelling of microfibers formation and motion during melt blowing

Sun, Guangwu; Song, Jie; Xu, Liang; Wang, X. H.

doi:10.1080/00405000.2017.1342522

Cited by 12 publications

(26 citation statements)

References 16 publications

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“…Yarin et al , observed the fiber movement in the air jet and presented a quasi-one-dimensional model to predict the fiber motion and diameter attenuation. Similarly, our previous model, − consisting of a Maxwell model and the Lagrange method, was presented to predict the fiber diameter, temperature, speed, and position.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Melt-Blown Fibrous Web Uniformity Based on the Fiber Dynamics on a Collector

Sun¹,

Ruan²,

Wang

et al. 2019

Ind. Eng. Chem. Res.

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Fabricating a uniform melt-blown web was a complicated engineering problem. A complementary study to our previous model was conducted to aid in the optimization of the prediction of fibrous web formation. The air velocity distribution on a collector was first investigated by computational fluid dynamics software and hot-wire anemometer measurement. The numerical model consisting of beads and poles was used to describe the fiber behavior, such as movement and bending, on the collector. The fiber positions were predicted by calculating the final lay-down positions of beads. The variation coefficient of the basis weight was introduced to evaluate the uniformity of the fibrous web. A larger variation coefficient represented worse uniformity, while a smaller variation coefficient represented better uniformity. Additionally, the effects of the processing conditions on the web uniformity were investigated by the presented model. The entire modeling studied the mechanism of fibrous web formation and evaluated the web uniformity.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Melt-Blown Fibrous Web Uniformity Based on the Fiber Dynamics on a Collector

Sun¹,

Ruan²,

Wang

et al. 2019

Ind. Eng. Chem. Res.

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“…In the last decade, innovative mold configurations were tested and verified, as well as the optimal processing conditions to decrease the fiber size to 300-500 nm. Furthermore, several new techniques/methods have been initiated, developed and published to optimize the characteristics, added value and performance given by using these MB fibers [44,45].…”

Section: Electrostatic Versus Mechanical Filtrationmentioning

confidence: 99%

“…Results obtained proved that the reusability of MB filter (which contains nanofiber filter and belongs to the N95 face mask); some parameters that must be considered and mentioned here are as follows: airflow rate, filtration efficiency, specific surface, morphological properties, etc., all of them being evaluated after two different types of cleaning treatments [45]. Compared to the NF filter, which retains its good filtration efficiency, the MB filtering performance decreases after the treatment with ethyl alcohol.…”

Section: Electrostatic Versus Mechanical Filtrationmentioning

confidence: 99%

Selected Respiratory Protective Devices: Respirators and Significance of Some Markings

Otřísal

Bungău

Obŝel³

et al. 2021

Sustainability

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Currently, setting the obligation to use respiratory protective equipment with a level of protection of at least FFP2 in public transport and commercial and shopping centers are considered within the European Union. Many new products appeared on the European market within these specifications, and many symbols have been used. The paper deals with the meaning of selected respiratory protection based on respirators symbols and markings (which appeared massively, especially after the pandemic situation in the spring of 2020), these symbols not being uniformly understood and well communicated. We also mention and discuss some of the problems related to setting the conditions of public procurement, which affect respirators. Thus, this review is an “informative guide” in facilitating the understanding and use of full knowledge of the most appropriate respiratory protective devices in various situations.

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“…In 2013, new die configurations and process conditions were explored to reduce the fiber size to the range of 300–500 nm [9]. In addition, some new technical methods have been developed in recent years to improve the performance and application value of melt-blown fibers [10,11,12,13,14]. In this paper, we explored the idea of adding a static electrical field to the melt blown process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Polypropylene Micro and Nanofibers by Electrostatic-Assisted Melt Blown and Their Application

Zheng

Chen

et al. 2018

Polymers

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In this paper, a novel electrostatic-assisted melt blown process was reported to produce polypropylene (PP) microfibers with a diameter as fine as 600 nm. The morphology, web structure, pore size distribution, filtration efficiency, and the stress and strain behavior of the PP nonwoven fabric thus prepared were characterized. By introducing an electrostatic field into the conventional melt-blown apparatus, the average diameter of the melt-blown fibers was reduced from 1.69 to 0.96 μm with the experimental setup, and the distribution of fiber diameters was narrower, which resulted in a filter medium with smaller average pore size and improved filtration efficiency. The polymer microfibers prepared by this electrostatic-assisted melt blown method may be adapted in a continuous melt blown process for the production of filtration media used in air filters, dust masks, and so on.

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Numerical modelling of microfibers formation and motion during melt blowing

Cited by 12 publications

References 16 publications

Numerical Study of Melt-Blown Fibrous Web Uniformity Based on the Fiber Dynamics on a Collector

Numerical Study of Melt-Blown Fibrous Web Uniformity Based on the Fiber Dynamics on a Collector

Selected Respiratory Protective Devices: Respirators and Significance of Some Markings

Preparation of Polypropylene Micro and Nanofibers by Electrostatic-Assisted Melt Blown and Their Application

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