The glass transition temperature (Tg) will be explained to you briefly. That is to say, when the ambient temperature reaches above Tg, the substance begins to change from solid state to viscoelastic state, and from non-flowable state to flowable state. Therefore, the higher the glass transition temperature of a substance, the more energy it needs to transform from a solid state to a liquid state, and the higher the temperature, so its heat resistance is better.

From this point of view, the higher the Tg, the better the temperature resistance of the bonding head made of this adhesive.

But then again, acrylate adhesives are generally not used as high-temperature resistant adhesives, but as stationery adhesives (such as those on the transparent film we use) or other unstructured adhesives, which requires it to be liquid at room temperature. If we assume that its Tg is 40℃, then it can only be liquid when the ambient temperature is higher than 40℃ and solid when the ambient temperature is lower than 40℃. In this case, unless it is particularly hot in summer, the adhesive layer on the transparent adhesive we use will be very strong, so the transparent adhesive is not sticky at all.

From this point of view, the lower the Tg (such as 20℃), the better the viscosity of acrylate adhesive.

However, different adhesives have different characteristics. The above is just a special case analysis based on acrylate adhesive.