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  • BSI
    20/30406602 DC BS ISO 11443. Plastics. Determination of the fluidity of plastics using capillary and slit-die rheometers
    Edition: 2020
    $42.22
    / user per year

Description of 20/30406602 DC 2020

This document 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 document 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 document can be used to characterize the rheological behaviour of such fluids for a given geometry.



Standard Number20/30406602 DC
TitleBS ISO 11443. Plastics. Determination of the fluidity of plastics using capillary and slit-die rheometers
StatusDefinitive
Publication Date2020-04-23
Identical National Standard OfISO/DIS 11443
DescriptorsPlastics and rubber technology, Test equipment, Mathematical calculations, Testing conditions, Shear stress, Viscosity measurement, Fluids, Physical property measurement, Plastics, Mechanical properties of fluids, Rheological properties, Viscosity
ICS83.080.01 Plastics in general
CommitteePRI/21
PublisherBSI
Pages43

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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