PlastometerA convenient and affordable method for rating the viscosity of adhesive pastes is here. The plastometer by Proto-tech Research provides precise, easy measurements of the thickness of a bolus of material while it is being compressed under a constant load. Just sandwich a peanut-sized ball of cement between two mylar sheets and place it between the two polished stainless steel platens. Turn the knob to gradually release the upper weight. The reliable dial micrometer displays the deflection to within 0.001". Record the thickness at intervals to plot the flow of the adhesive.
The plastometer comes complete with extra steel weights to enable load levels of 8.0, 12.0 16.0 and 20.0 N. Upgrade to the digital Mitutoyo micrometer for continuous measurement outputs through a USB connection. |
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A comparison of six commercial composites under 16N of loading for four minutes shows significant differences between their flow characteristics.