<p>ISO 16790:2005 specifies a method for determining the drawing and break characteristics of molten plastics. The method involves the measurement of the force generated in deforming a molten filament under defined extrusion temperature and drawing conditions.</p>
<p>Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow.</p>
<p>The method is suitable for thermoplastics moulding and extrusion materials that can be extruded using a capillary extrusion rheometer, or an extruder with capillary rod die or other extrusion devices, and have sufficient melt strength to be handled without difficulty.</p>
<p>Such materials should be chemically stable and produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc.</p>
<p>This method may provide information on:</p>
<ul><li>processability for all extrusion techniques;</li><li>the effect of mechanical and thermal history;</li><li>the effect of chemical structure, such as branching, entanglements and molecular mass.</li></ul>
Registration number (WIID)
41632
Scope
<p>ISO 16790:2005 specifies a method for determining the drawing and break characteristics of molten plastics. The method involves the measurement of the force generated in deforming a molten filament under defined extrusion temperature and drawing conditions.</p>
<p>Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow.</p>
<p>The method is suitable for thermoplastics moulding and extrusion materials that can be extruded using a capillary extrusion rheometer, or an extruder with capillary rod die or other extrusion devices, and have sufficient melt strength to be handled without difficulty.</p>
<p>Such materials should be chemically stable and produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc.</p>
<p>This method may provide information on:</p>
<ul><li>processability for all extrusion techniques;</li><li>the effect of mechanical and thermal history;</li><li>the effect of chemical structure, such as branching, entanglements and molecular mass.</li></ul>
