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  • BSI
    20/30406605 DC BS ISO 16790. Plastics. Determination of drawing characteristics of thermoplastics in the molten state
    Edition: 2020
    $44.66
    / user per year

Description of 20/30406605 DC 2020

This document 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.

Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow.

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.

Such materials should be chemically stable and produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc.

This method may provide information on

  • processability for all extrusion techniques,

  • the effect of mechanical and thermal history and

  • the effect of chemical structure, such as branching, entanglements and molecular mass.

This technique is one of a number of techniques that can be used to measure the extensional flow behaviour of a material. This method of measurement does not necessarily reproduce the drawing conditions to which thermoplastics are subjected to during their processing.



Standard Number20/30406605 DC
TitleBS ISO 16790. Plastics. Determination of drawing characteristics of thermoplastics in the molten state
StatusDefinitive
Publication Date2020-04-08
Identical National Standard OfISO/DIS 16790
DescriptorsPlastics, Drawing (forming process), Liquids, Extrudability tests, Mechanical measurement, Thermoplastic polymers, Rheological properties, Polymers
ICS83.080.20 Thermoplastic materials
CommitteePRI/21
PublisherBSI
Pages23

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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