Technical Articles
Dynisco has published these technical articles:
(Molding Equipment and Supplies)
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This study examined the improvements in injection molded part quality using cavity pressure to initiate switchover from injection pressure to holding pressure. Cavity pressure produced more...
(Calibration and Testing Services)
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Two areas where the melt flow rate test it is not useful are related to processing....
(Calibration and Testing Services)
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Here are the steps to take in cases where the MFR is not provided by the polymer supplier....
(Calibration and Testing Services)
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If you spend a lot of time looking at data sheets you have probably noticed a trend over the last several years in how the melt flow rate (MFR) is reported. Along with, or instead of, the MFR, a new...
(Calibration and Testing Services)
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To fully appreciate the strengths and weaknesses of the melt-flow-rate (MFR) test it is important to know something about the way the test is performed....
(Calibration and Testing Services)
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There is a well-established relationship between something called the weightaverage molecular weight of a polymer and a parameter known as the zero-shear viscosity....
(Calibration and Testing Services)
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Few molders perform the test in-house. Of those that do, most don't understand why they are doing it or what they are measuring....
(Calibration and Testing Services)
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There are two points in the manufacturing supply chain where a determination ofaverage molecular weight (MW) is important. The first is when the material is firstreceived by the molder. The second is...
(Calibration and Testing Services)
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Once degradation has been established, the discussion inevitably turns to how it happened. It might be expected that the answer to this question is widely known. Not so. The good news is that the...
(Calibration and Testing Services)
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Here is why the melt flow test is not universal.
As useful as the melt flow rate (MFR) test can be, it is not universally applicable. Fundamentally, the test is intended to document differences in...
(Calibration and Testing Services)
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Though often criticized, MFR is a very good gauge of the relative average molecular weight of the polymer. Since molecular weight (MW) is the driving force behind performance in polymers, it turns out...
(Pressure Sensing)
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The Need For Pressure Measurement in Extrusion In order to maintain the dimensional stability necessary to produce extruded products that meet todays precise quality and tolerance specifications, it...
(Pressure Sensing)
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Extrusion processors are employing melt pressure transducers more and more frequently to help them improve output and melt quality, enhance production safety, and safeguard machinery. To select the...
(Pressure Sensing)
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When selecting a melt pressure transducer, the first factor you should consider is the pressure range that will be measured. Available in ranges between 0 and 25 psi and 0 and 30,000 psi, transducers...