What changes will occur in the physical and chemical properties of PET high temperature resistant tape when it is in a high temperature environment for a long time?
Publish Time: 2024-12-02
PET high temperature resistant tape is widely used in many industrial fields. When it is in a high temperature environment for a long time, its physical and chemical properties will undergo a series of complex and in-depth changes.
From the perspective of physical properties, the first is the appearance. As the high temperature action time increases, the color of the tape may gradually darken. This is due to the slight change in the internal structure of the material caused by the high temperature, which leads to changes in the absorption and reflection characteristics of light. The size of the tape may also change to a certain extent. There may be slight increases and decreases in length and width due to the thermal expansion and contraction effect. However, high-quality PET high temperature resistant tape will control this change within a very small range to ensure its fit and stability during use. In terms of flexibility, long-term high temperature will gradually move and rearrange the molecular chains of the tape, which may become slightly softer in the early stage, but if the temperature is too high or the time is too long, the excessive movement of the molecular chains will cause the tape to become brittle, the flexibility will be greatly reduced, and even cracking may occur.
In terms of chemical properties, high temperature environment will cause PET materials to degrade. The chemical bonds inside it begin to break under the action of heat energy, which will cause the molecular weight of the tape to gradually decrease, thus affecting its overall performance. For example, the viscosity of the tape will weaken as the chemical structure changes, and the originally good adhesion may gradually decrease until it cannot meet the pasting requirements. At the same time, some small molecules may be produced during the degradation process, which may volatilize, not only affecting the performance of the tape itself, but also polluting the surrounding environment and products in some application scenarios with high environmental requirements, such as electronic chip manufacturing workshops. Moreover, the change in chemical properties may also reduce the chemical corrosion resistance of the tape, and the ability to resist the erosion of certain acids, alkalis and other chemical substances is gradually lost, further limiting its application in complex environments.
In order to cope with these changes, when using pet high temperature resistant tape, it is necessary to fully consider the high temperature environment parameters in which it is located, including temperature range, heating time, etc., and select the appropriate model and specifications in combination with the specific performance indicators of the tape. At the same time, manufacturers are also constantly developing and improving, by adding special stabilizers, optimizing material formulas and other means to improve the performance stability of pet high temperature resistant tape in long-term high temperature environments to meet the increasingly stringent industrial application needs.
