ISO 306:2022

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

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.

Edition	2022
Published Date	2022
Published By	International Standardization Organisation
Page Count	16