What are the factors that affect the adhesiveness of thermally conductive double-sided adhesives tape?

What are the factors that affect the adhesiveness of thermally conductive double-sided adhesives tape?

For the thermal tape, in addition to exerting good thermal conductivity in the product, the viscosity of the thermally conductive double-sided adhesive is also very important. It plays the role of bonding the heating device and the heat sink, affecting the thermal conductivity What are the factors of the adhesive stickiness?

The factors that affect the adhesiveness of thermally conductive double-sided adhesive during the use process are mainly use problems and operation methods. Let’s learn about it together!

Use ambient temperature:

The use environment will have a greater impact on the viscosity of the thermally conductive double-sided adhesive. Generally, the adhesion performance is better in a high temperature environment. The viscosity of the thermally conductive double-sided adhesive is divided into initial viscosity and permanent viscosity. The initial viscosity guides the viscosity of the thermally conductive double-sided adhesive. The initial viscosity of the bonding at room temperature is 60%, and it needs to be placed statically for 22-24 hours, so that the adhesiveness of the thermally conductive double-sided tape will be maximized (the thermally conductive double-sided tape does not need to be placed statically when the temperature is heated to 40°C). ). Permanent tack is the tack, bond strength of thermally conductive double-sided adhesives that increases with time and temperature.

How to use:

The wrong operation of the thermally conductive double-sided adhesive will affect its viscosity, so the contact surface between the thermally conductive double-sided adhesive and the PCB and the radiator should be kept clean during use. Simply wipe it clean, because any dust on the contact surface will reduce the viscosity of the thermally conductive double-sided adhesive.

At the same time, the thermally conductive double-sided tape has two sides of release paper. Before use, tear off one of the release papers and then align the PCB. Then tear off the other side of the release paper, and then bond the thermally conductive double-sided tape to the heat sink. After it’s done, press down moderately and squeeze out the air in the gap to maximize its viscosity.

Both the use environment and the way of use will have a certain impact on the adhesiveness of the thermally conductive double-sided adhesive. Therefore, in the process of purchasing thermally conductive double-sided adhesives, this factor must be taken into account. It is necessary to ensure that the thermally conductive double-sided adhesive can play a good role in bonding and thermal conductivity. effect.

Leave a Reply

Your email address will not be published.

Language »