ISO/TC 61 Kunststoffe,
ISO/TC 61 Plastics,
ISO/TC 61 Plastiques,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 458-1
:
Plastics; Determination of stiffness in torsion of flexible materials; Part 1 : General method
Other titles:
Früher unter dem Titel: ISO/R 458 (1965-11)
Kunststoffe; Bestimmung der Torsionssteifigkeit von flexiblen Kunststoffen; Teil 1: Allgemeines Verfahren
Plastiques; Détermination de la rigidité en torsion des plastiques souples; Partie 1 : Méthode générale
Description:
Specification of a general method for the determination of the stiffness in torsion at various temperatures, particularly below 0 °C. An observation of torque and angle of deflection is made after an arbitrarily fixed time of load application, using the specified testing apparatus. This procedure is employed at a single temperature or at selected temperature intervals over a range specified for the material to be tested. The stiffness in torsion is expressed as the apparent torsional modulus of elasticity for each temperatur.