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301-3 Compressibility Index

Oct 17, 2019

COMPRESSIBILITY INDEX

Compressibility Index is a calculated data other than measured data, it is calculated by the formula and automatically calculated by LABULK 0335 Intelligent Tap Density Tester:

Compressibility Index = 100(V0– VF)/V0

V0 is unsettled apparent volume

VF is final tapped volume

The Compressibility Index is measure of the propensity of a powder to be compressed as described above. As such it is measure of the powder’s ability to settle, and it permit an assessment of the relative importance of interparticulate interactions.

In a free-flowing powder, such interactions are less significant, and the bulk and tapped densities will be closer in value. For poorer flowing materials, there are frequently greater interparticle interactions, and a greater difference between the bulk and tapped densities will be observed. These differences are reflected in the Compressibility Index. In order to obtain compressibility index operator in the lab should first obtain apparent density and second obtain tapped density.

Because the interparticulate interactions influencing the bulking properties of a powder are also the interactions that interfere with powder flow, a comparison of the bulk and tapped densities can give a measure of the relative importance of these interactions in a given powder. Such a comparison is often used as an index of the ability of the powder to flow, for example the Compressibility Index and Hausner Ratio as described below. The Compressibility Index and Hausner Ratio are measures of the propensity of a powder to be compressed as described above. AimSizer Tap Density Tester measures both. As such, they are measures of the powder’s ability to settle, and they permit an assessment of the relative importance of interparticulate interactions. In a free-flowing powder, such interactions are less significant, and the bulk and tapped densities will be closer in value. For poorer flowing materials, there are frequently greater interparticle interactions, and a greater difference between the bulk and tapped densities will be observed. These differences are reflected in the Compressibility Index/Hausner Ratio.

 

 

 

CARR’S COMPRESSIBILITY INDEX

COMPRESSIBILITY INDEX FORMULA

Compressibility Index Formula – Calculate by the formula:
100(V0-VF)/V0
V0=unsettled apparent volume
VF=final tapped volume

HAUSNER RATIO

Hausner Ratio=V0/VF

HAUSNER RATIO CALCULATION

Hausner Ratio=V0/VF

LABULK 0335 Tap Density Tester is used to measure and calculate the compressibility index of powders.

LABULK 0335 is upgraded from discontinued tap density tester AS-100 that not able to measure the compressibility index automatically.

LABULK 0335 Intelligent Tap Density Tester (Carr compacted bulk density tester) is used to measure tapped density or packed density of powders, as well as granulated or flaked materials by automatically standardized and repeatable procedures. Much superior to Vankel tap density tester, LABULK 0335 tap density equipment consists of 7 inch broad LCD panel, micro controller, printer, glass cylinder and holder as well as sound acoustic cabinet. LABULK 0335 tapped density apparatus features easy operation, compact in size, light in weight, tapping height and speed controllable, tap density results printable, it also output flowability data automatically such as Hausner Ratio and Compressibility Index(Carr compressibility). It meets all relevant international standards and being widely used in metal, pharma, food, chemical etc industries. LABULK 0335 has become the most price performance ratio tap density tester for sale. LABULK 0335 conforms to all international standards such as USP 616, ASTM B527 ISO 787/11 etc.

LABULK 0335 tap density tester upgrades from economic AS-100 tap density tester, price unchanged.

LABULK 0335 Intelligent Tap Density Tester
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