20/30406602 DC - BS ISO 11443. Plastics. Determination of the fluidity of plastics using capillary and slit-die rheometers

20/30406602 DC

BS ISO 11443. Plastics. Determination of the fluidity of plastics using capillary and slit-die rheometers

Status : Current, Draft for public comment   Published : April 2020

Format
PDF

Format
HARDCOPY



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
StatusCurrent, Draft for public comment
Publication Date23 April 2020
Normative References(Required to achieve compliance to this standard)ISO 1133-2, ISO 6507-1, ISO 11403-2, ISO 4287, ISO 1133-1
Informative References(Provided for Information)No other standards are informatively referenced
International RelationshipsISO/DIS 11443
Draft Expiry Date16 June 2020
DescriptorsFluids, Physical property measurement, Viscosity measurement, Test equipment, Plastics, Plastics and rubber technology, Rheological properties, Mechanical properties of fluids, Mathematical calculations, Testing conditions, Shear stress, Viscosity
ICS83.080.01
Title in FrenchPlastiques — Détermination de la fluidité au moyen de rhéomètres équipés d'une filière capillaire ou plate
CommitteePRI/21
PublisherBSI
FormatA4
DeliveryYes
Pages43
File Size842 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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