Universally used to Describe a Standard Rotational Viscometers
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Posted On :
Jan-12-2012
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Article Word Count :
525
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The yield is an important physical property used to describe the flow behavior of the initial liquid and semi-solids such as pastes.
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The yield behavior
The yield is an important physical property used to describe the flow behavior of the initial liquid and semi-solids such as pastes. Measured or calculated parameters of yield and yield strain. Yield the critical shear stress, a substance that causes the flow to begin. Yield strain of the deformation, stress, flow begins.
Most of the material is designed to target the yield stress value, the behavior meets the client's needs. Ketchup, for example, should flow from the vial, shake or squeezed, but then solidify French fries. Shake the bottle and squeezing stresses the ketchup, it passes the ketchup settles on the fries, they restore the structure, the ketchup, Äúsits, AU site, rather than flowing water is not as French fries.
Many water-based paints low yield stresses. Brush or spray is sufficient to point out that the paint flows easily and smoothly through the painted walls. But allowed to rest undisturbed on the surface of a thin layer of paint applied, quickly recovers its structure, so that there is no unsightly, Äúdripping AS after the wavy brush marks.
Adhesive can vary from a low viscosity, high viscosity, depending on the formulation and application. Thickness of the floor tile adhesive is stiff when you first put on the blade, but easy to spread over the floor. This ease of application it is important to the consumer, although perhaps more valued, Äústiffness adhesive quality of the AU, which is related to the yield stress value.
Gives the test data
As explained above, the operation principle of rotational viscometer to drive through a calibrated coil spring motor drive shaft is connected to the spindle. When the vane spindle is immersed in the test substance, material resistance movement measured by monitoring the increase in torque as the engine rotates at low speed. Speed ??options ranging from 0.01 to 5 revolutions per minute, depending on the nature of the test substance.
The yield stress measurement, control standard benchtop rotational viscometer with continuous sensing capability of this new software algorithm was originally developed in 2001. Field testing of industrial and academic communities since 2001 and extends to 2004. New users are now approved applications, adhesives, resins, starch, beverages and various food products. The standard rotational viscometers began a new chapter in its role to help better describe the complete flow of materials properties.
"If vane spindle did not move all the torque-time plot yield a straight line. Data, but often looks like the diagram above, as usual, when increasing the force transmitted to the vane spindle to test material deformation. The maximum torque value is the yield limit. Firmware means algorithm to convert the yield stress value, which is determined by the geometry of the vane spindle viscometer and rotational speed, the maximum torque value.
Shear stress measurement range of the instrument (in pascals) determine the size and shape of blades and spindle scales torque range to calibrate the spring. Line of slope (stress data) before you start the flow indication Äústiffness AS material. The solid line shows the rigid structure of the material, while low-angle line indicates the softness.
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Article Source :
http://www.articleseen.com/Article_Universally used to Describe a Standard Rotational Viscometers_132783.aspx
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Author Resource :
Visit viscometer.co for all types of viscometer according to your need.
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Keywords :
viscometer, digital viscometer,
Category :
Business
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Business
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