TheTg point of the resin refers to the glass transition temperature of the resin, that is, the temperature at which the polymer changes from a highly elastic state to a glass state.The transition temperature of amorphous polymers (including non-crystalline parts in crystalline polymers) from glassy state to high elastic state or from the latter to the former is the lowest temperature at which the macromolecular segments of amorphous polymers can move freely. Tg means that there are certain differences with the method and conditions of the measurement.The glass transition temperature of resin is an important process index of resin.
1.The critical temperature at which the substrate melts from a solid state to a rubbery fluid is called the Tg point or melting point.
2. The higher the Tg point, the higher the temperature requirements of the plate during pressing, and the pressed plate will be harder and brittle, which will affect the quality of the mechanical drilling (if any) in the subsequent process and the use of the plate to a certain extent. electrical properties.
3. The Tg point is the maximum temperature (°C) at which the substrate remains rigid. That is to say, ordinary materials will not only soften, deform, and melt at high temperature, but also show a sharp decline in mechanical and electrical properties.
4. Generally, the Tg of the plate is above 130 degrees, the High-Tg is generally greater than 170 degrees, and the medium Tg is greater than 150 degrees; the Tg of the substrate is increased, and the heat resistance, moisture resistance, chemical resistance, stability resistance of the product Features will improve and improve. The higher the TG value, the better the temperature resistance of the sheet.
