Norm

NEN-ISO 11443:2014 en

Kunststoffen - Bepaling van het vloeigedrag van kunststoffen met capillaire en spleet-capillaire rheometers

143,10

Over deze norm

Status Definitief
Aantal pagina's 36
Commissie Kunststoffen
Gepubliceerd op 01-04-2014
Taal Engels
NEN-ISO 11443 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 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.

Details

ICS-code 83.080.01
Nederlandse titel Kunststoffen - Bepaling van het vloeigedrag van kunststoffen met capillaire en spleet-capillaire rheometers
Engelse titel Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers
Vervangt

Winkelwagen

Subtotaal:

Ga naar winkelwagen