ISO 11443:2014 PDF

Scope: This International Standard specifies methods for determining the fluidity of plastics melts subjected to shear stresses at rates and temperatures approximating to those arising in plastics processing. Testing plastics melts in accordance with these methods is necessary since the fluidity of plastics melts is generally not dependent solely on temperature, but also on other parameters, in particular shear rate and shear stress. The methods described in this International Standard are useful for determining melt viscosities from 10 Pa∙s to 107 Pa∙s, depending on the measurement range of the pressure and/or force transducer and the mechanical and physical characteristics of the rheometer. The shear rates occurring in extrusion rheometers range from 1 s−1 to 106 s−1. Elongational effects at the die entrance cause extrudate swelling at the die exit. Methods for assessing extrudate swelling have also been included. The rheological techniques described are not limited to the characterization of wall-adhering thermoplastics melts only; for example, thermoplastics exhibiting “slip” effects[1][2] and thermosetting plastics can be included. However, the methods used for determining the shear rate and shear viscosity are invalid for materials which are not wall-adhering. Nevertheless, this International Standard can be used to characterize the rheological behaviour of such fluids for a given geometry.

ISO 11443:2014 Referenced Document

ISO 1133-1:2011 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 1: Standard method
ISO 1133-2:2011 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 2: Method for materials sensitive to time-temperature history and/or moisture
ISO 11403-2:2012 Plastics - Acquisition and presentation of comparable multipoint data - Part 2: Thermal and processing properties
ISO 4287:1997 Geometrical Product Specification (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters
ISO 6507-1:2005 Metallic materials - Vickers hardness test - Part 1: Test method

2021 ISO 11443:2021 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers
2014 ISO 11443:2014 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers
2005 ISO 11443:2005 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers
1995 ISO 11443:1995 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers