The cause of the inability to use PET high-temperature tape properly:

1. Types of adherents. Adhesives of different materials, with varying internal molecular structures and surface roughness, can affect the bonding effect of the product. It is advisable to choose the appropriate high-temperature PET adhesive tape based on the surface roughness of the adherent.

2. Surface Contaminants. Dust, oil stains, water spots, and other foreign matter on the adhesive surface can prevent PET high-temperature tape from functioning properly. Therefore, it is necessary to clean the adhesive surface before use.

3. Adhesive Pressure. When applying PET high-temperature adhesive tape, the pressure applied directly affects the tightness of the bond between the tape and the adhered object.

4. Usage Environment. As is widely known, PET high-temperature tape is suitable for use in high-temperature environments; however, if the temperature is too low, it will also prevent the PET high-temperature tape from functioning properly.

5. Other reasons, such as expired products, substandard storage conditions, and mismatched process parameters.

The above explains the reasons for the improper use of PET high-temperature tape. When you find that the PET high-temperature tape is not functioning correctly, you can follow the scenarios mentioned to identify the cause and address the issue.