ISO-12058-1 › Plastics - Determination of viscosity using a falling-ball viscometer - Part 1: Inclined-tube method
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This document specifies the general principles of a method, using an inclined‑tube falling‑ball viscometer, for determining the viscosity of polymers and resins in the liquid emulsified or dispersed state. It is intended for application to liquids over a viscosity measurement range of 0,6 mPa·s to 250 000 mPa·s (temperature range −20 °C to +120 °C) for which the shear stress and shear rate are proportional, i.e. the viscosity is independent of the shear rate. This ideal behaviour is commonly known as Newtonian behaviour. If a liquid differs significantly from this behaviour, different results can be obtained with the different balls of a falling‑ball viscometer or from viscometers with different geometries, such as capillary and rotational viscometers.
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83.080.01 (Plastics in general)
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Document Number
ISO 12058-1:2018
Revision Level
2ND EDITION
Status
Current
Publication Date
July 1, 2018
Committee Number
ISO/TC 61/SC 5