The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2011
Filed:
Dec. 27, 2006
Planar elongational viscosity measuring method and planar elongational viscosity measuring apparatus
Tsutomu Takahashi, Niigata, JP;
Masataka Shirakashi, Niigata, JP;
Toshihiro Kawano, Niigata, JP;
Nagaoka University of Technology, Nagaoka, JP;
Abstract
A planar elongational viscosity measuring method and apparatus which can advance analysis of planar elongational viscosities for high-viscosity and low-viscosity fluids. As a bomb-shell like bobis pushed into a container, a non-Newtonian fluidreaches a planar elongation state in a side space G, counterforce F applied to the bomb-shell like bobat this time is measured, planar elongation stress σ is calculated using the counterforce F and conditions input by a user based on push-up force, the counterforce F, and the horizontal cross-sectional area of the side space G, and the planar elongation stress is divided by a planar elongation speed ε', thereby acquiring a planar elongational viscosity η. Accordingly, it becomes possible to acquire planar elongational viscosities of not only a high-viscosity non-Newtonian fluid, but also a low-viscosity non-Newtonian fluid which is not likely to be solidified, resulting in an advancement of analysis of planar elongational viscosities for high-viscosity and low-viscosity fluids.