ISO 306:2022

Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)

Publication date: 18 nën 2022

General information

Current stage: 90.92 Effective date: 19 nën 2025

Originator: ISO

Owner: ISO/TC 61/SC 2

Type: International Standard

ICS: 83.080.20

Gjuha: anglisht frëngjisht

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Statusi: Publikuar

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Scope

This document specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials:
—    Method A50 using a force of 10 N and a heating rate of 50 °C/h;
—    Method B50 using a force of 50 N and a heating rate of 50 °C/h;
—    Method A120 using a force of 10 N and a heating rate of 120 °C/h;
—    Method B120 using a force of 50 N and a heating rate of 120 °C/h.
The methods specified are applicable only to thermoplastics, for which they give a measure of the temperature at which the thermoplastics start to soften rapidly.