Numerical modeling and experimental investigation of fiber diameter of melt blowing nonwoven web

2015 ◽  
Vol 27 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Bo Zhao
Keyword(s):  
Flow Field ◽  
Field Model ◽  
Fiber Diameter ◽  
Jet Flow ◽  
Experimental Result ◽  
Computer Assisted ◽  
Melt Blowing ◽  
Content Type ◽  
Air Jet ◽  
Computer Assisted Design

Purpose – The purpose of this paper is to varify, the air drawing model and the air jet flow field model of dual slot shape die for a polymer in a melt blowing process were established, by the experimental results obtained with experimental equipment. Design/methodology/approach – The air jet flow field model is solved by introducing the finite difference method. The air drawing model of polymers in the melt blowing process was studied with the help of the simulation results of the air jet flow field. Findings – The higher air initial velocity and air initial temperature can all yield finer fibers and causes the fibers to be attenuated to a greater extent. Originality/value – The predicted fiber diameter agrees well with the experimental result, which verifies the reliability of these models. At the same time, the results also reveal the great potential of this research for the computer-assisted design of melt blowing technology.

Simulation and Experimental Investigations of Fiber Diameter of Spunbonding Nonwovens by Means of the Air Jet Flow Field Model

2010 ◽  
Vol 136 ◽  
pp. 5-9
Author(s):  
B. Zhao
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
Particle Image ◽  
Field Model ◽  
Fiber Diameter ◽  
Jet Flow ◽  
Experimental Investigations ◽  
Air Velocity ◽  
Air Jet ◽  
Image Velocimetry

The air jet flow field models of spunbonding process are founded. It is simulated by means of the finite difference method. The numerical simulation computation results of distributions of the air velocity match quite well with the experimental data. The air drawing model of polymer is solved with the help of the distributions of the air velocity measured by a particle image velocimetry. The predicted filament fiber diameter agrees with the experimental data well.

Effects of the die Parameters on the Air Flow Field from a Dual Slot Melt Blowing Die

2011 ◽  
Vol 332-334 ◽  
pp. 1347-1351
Author(s):  
Xu Chuan ◽  
Li Li Wu
Keyword(s):  
Flow Field ◽  
Field Model ◽  
Air Flow ◽  
Jet Flow ◽  
Melt Blowing ◽  
Mean Velocity ◽  
Air Jet ◽  
Slot Die ◽  
The Mean

In this paper, the air jet flow field model for the dual slot die is established. The flow field from the blunt die was found to exhibit that as the jet angle becomes sharper, width of the die slot and distance between the inside edges of both jets more narrow, the mean velocity under the die increases.

Predicting the Diameter of Polyamide Superfine Fiber of Nonwoven Fabrics

2010 ◽  
Vol 121-122 ◽  
pp. 138-142
Author(s):  
Ting Chen ◽  
Meng Sun ◽  
Li Li Wu
Keyword(s):  
Fiber Diameter ◽  
Processing Parameters ◽  
Computer Assisted ◽  
Air Velocity ◽  
Melt Blowing ◽  
Polymer Flow ◽  
Nonwoven Fabrics ◽  
Computer Assisted Design ◽  
Initial Polymer ◽  
Superfine Fiber

The polymer air drawing model of polyamide melt blown nonwoven fabrics is established. The predicted fiber diameter coincides with the experimental data. The effects of the processing parameters on the fiber diameter are investigated. It is found that smaller polymer flow rate, higher initial polymer temperature, larger initial air velocity and larger die-to-collector distance can all produce finer fibers while too high initial air velocity and too large die-to-collector distance contribute little to the polymer drawing of polyamide melt. The results show great perspective of this research in the field of computer assisted design of the melt blowing technology.

Modeling polypropylene polymer air drawing in the spunbonding nonwoven process

2014 ◽  
Vol 26 (2) ◽  
pp. 184-194 ◽  
Author(s):  
Bo Zhao
Keyword(s):  
Experimental Data ◽  
Constant Pressure ◽  
Fiber Diameter ◽  
Polymer Melt ◽  
Processing Parameters ◽  
Computer Assisted ◽  
Melt Temperature ◽  
Throughput Rate ◽  
Content Type ◽  
Computer Assisted Design

Purpose – The air drawing model plays an important in spunbonding. The purpose of this paper is to study the influence of the density and the specific heat capacity of polymer melt at constant pressure changing with polymer temperature on the fiber diameter. Design/methodology/approach – The air drawing model of the polypropylene polymer in a spunbonding process is presented and solved by introducing the numerical computation results of the air flow field of aerodynamic device. Findings – The model prediction of the filament fiber diameter coincides well with the experimental data. The effects of the processing parameters on the filament fiber diameter are discussed. A lower polymer throughput rate, higher polymer melt temperature, higher primary air temperature, higher venturi gap, higher air suction speed, and higher quench pressure can all produce finer filament fiber. Originality/value – The experimental results show that the agreement between the results and experimental data are very better, which verifies the reliability of these models. The results show great prospects for this research in the field of computer assisted design of spunbonding technology.

Modeling the Air-Jet Flow Field of a Dual Slot Die in the Melt Blowing Nonwoven Process

2004 ◽  
Vol 74 (11) ◽  
pp. 1018-1024 ◽  
Author(s):  
Ting Chen ◽  
Xinhou Wang ◽  
Xiubao Huang
Keyword(s):  
Flow Field ◽  
Jet Flow ◽  
Melt Blowing ◽  
Air Jet ◽  
Slot Die

Optimum Design for the Dual Slot Die Parameters of Melt Blowing Process

2013 ◽  
Vol 796 ◽  
pp. 272-276
Author(s):  
Ting Ting Cheng ◽  
Chuan Xu ◽  
Li Li Wu ◽  
Ting Chen
Keyword(s):  
Flow Field ◽  
Air Flow ◽  
Slot Width ◽  
Design Parameters ◽  
Orthogonal Experimental Design ◽  
Computer Assisted ◽  
Range Analysis ◽  
Melt Blowing ◽  
Air Jet ◽  
Slot Die

Melt blowing process can produce superfine fibers. In this process, the polymer is drawn by the high velocity hot air jets from the dual slot die. The die parameters have great effects on the fiber diameter. In this paper, the die parameters of the dual slot die in an industrial melt blowing equipment are studied using the orthogonal experimental design method. Three parameters namely the inset distance, slot width and slot angle are considered. Each parameter has three levels. Nine sizes of dual slot dies with different design parameters are numerically simulated using the established air flow field model of melt blowing process. Distributions of air velocity and air temperature of nine air jet flow fields are obtained. Effects of the three parameters are studied with range analysis and variance analysis. The results show that the inset distance and slot width have significant effects on the air flow field while effect of the slot angle is unremarkable. Finally the optimal die parameters are obtained. The results lay the theoretical foundation for further studies on the computer assisted design for the dual slot die in the melt blowing process.

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