High Shear Rate Rheometry of Low-Viscosity Liquids.

1987 ◽  
Author(s):  
Arthur S. Lodge
Keyword(s):  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Low Viscosity

scholarly journals Controlled Degradation of Commercial Resin for Meltblown Nonwoven Fabric Sheet Production

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3892
Author(s):  
Yuya Sasai ◽  
Yoshio Iizuka ◽  
Kaho Osada ◽  
Kentaro Taki
Keyword(s):  
Shear Rate ◽  
Rotation Speed ◽  
Nonwoven Fabric ◽  
Processing Method ◽  
High Shear Rate ◽  
High Shear ◽  
Zero Shear Viscosity ◽  
Melt Flow Rate ◽  
Low Viscosity ◽  
Wide Range

Manufacturing meltblown nonwoven fabrics requires special grades of resin with very low viscosity, which are not dealt with so much on market and cost quite high compared to the standard grades. We propose a high-shear rate processing method that can quickly and easily produce such low-viscosity resin from the commercial one without using organic peroxides. In this method, we apply high-shear stress to molten resin by using a high-shear extruder, which is a single screw extruder with high screw rotation speed, and the resin is thermally decomposed of its shear-induced heat which is quickly generated. We found that polypropylene with a value of melt flow rate over a thousand, which was required for the meltblown process, was produced from the standard grade with the high-shear extruder at the screw rotation speed of 3600 min−1 and the barrel temperature over 300 ∘C. Using the degradated polypropylene, a meltblown nonwoven fabric sheet was successfully fabricated. We also developed a numerical simulator of the high-shear extruder which can handle a wide range of the screw rotation speed and barrel temperature by the Nusselt number modulated with the operational conditions. The experimental values of the zero-shear viscosity and temperature at the exit of the extruder agreed well with the simulation results. Our high-shear rate processing method will enable us to quickly and easily produce various meltblown nonwoven fabric sheets at low costs.

Protein-based nanoparticles synthesized at a high shear rate and optimized for drug delivery applications

2021 ◽  
pp. 116133
Author(s):  
Saeideh Hassanzadeh ◽  
Ali Nematollahzadeh ◽  
Behruz Mirzayi ◽  
S. Fatemeh Kaboli
Keyword(s):  
Drug Delivery ◽  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Drug Delivery Applications

Analysis of Factors Determining Parison Properties in High Shear Rate Blow Molding

1975 ◽  
Vol 19 (3) ◽  
pp. 351-370 ◽  
Author(s):  
J. S. Schaul ◽  
M. J. Hannon ◽  
K. F. Wissbrun
Keyword(s):  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Blow Molding

Development and calibration of a high pressure high shear rate capillary rheometer

2017 ◽  
Vol 157 ◽  
pp. 581-587 ◽  
Author(s):  
Stefan Pollak ◽  
Sandra Hüttemann ◽  
Sergio E. Quiñones-Cisneros ◽  
Eckhard Weidner
Keyword(s):  
High Pressure ◽  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Capillary Rheometer

scholarly journals Electro-Rheological Properties of Liquid Crystal in High Shear Rate Region

2007 ◽  
Vol 35 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Takatsune Narumi ◽  
Hiroyoshi Maeda ◽  
Hiroyuki Yoshizawa ◽  
Tomiichi Hasegawa
Keyword(s):  
Liquid Crystal ◽  
Shear Rate ◽  
Rheological Properties ◽  
High Shear Rate ◽  
High Shear ◽  
Rate Region

Rheological behavior of SAN/PC blends under extremely high shear rate

1989 ◽  
Vol 37 (7) ◽  
pp. 1837-1853 ◽  
Author(s):  
Hideroh Takahashi ◽  
Takaaki Matsuoka ◽  
Takashi Ohta ◽  
Kenzo Fukumori ◽  
Toshio Kurauchi ◽  
...  
Keyword(s):  
Shear Rate ◽  
Rheological Behavior ◽  
High Shear Rate ◽  
High Shear
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