Jetzt auswählen und bestellen
154,70 €
exkl. USt.
In den Warenkorb
Norm

ISO 11443:2021

Ausgabedatum: 2021 02 26

Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers

This document specifies methods for determining the fluidity of plastics melts subjected to shear stresses at rates and temperatures approximating to those arising in pla...
Gültig
Herausgeber:
International Organization for Standardization
Format:
Digital | 36 Seiten
Sprache:
Englisch

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 of great importance 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.

ISO 11443:2021
2021 02 26
Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers
Norm
ISO 11443:2014
2014 03 18
Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers
Norm
ISO 11443:2005
2005 03 02
Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers
Norm
ISO 11443:1995
1995 02 02
Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers
Norm
Historie aufklappen