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How To Understand The Protective Film Adhesion, Adhesion, Cohesion? Jun 04, 2018

1. Adhesion:

Refers to the binding force of the colloid and the film. If the adhesion is greater than the adhesion, when the protective film is torn off, the bond between the adhesive molecules and the film will be broken, resulting in degumming.

2. Adhesion:

Refers to the force required to peel the protective film from the surface to be attached after a period of time. The adhesion force is related to the material to be attached, the pressure, the filming time, the angle when the film is torn off, and the temperature. In general, as time and pressure increase, the adhesive force will also increase, and the viscosity of the protective film cannot be increased too much to ensure that the adhesive is not left without adhesive residue. The 180-degree peel test is generally used to measure adhesion.

3. Cohesion:

Refers to the internal strength of the colloid, and the colloidal force of the colloidal film as the protective film must be very high. Otherwise, when the protective film is torn, the internal cracking of the colloid will cause the residue of the colloid. Cohesion force measurement method: The protective film is affixed to the surface of stainless steel, a certain weight weight is hung on the protective film to measure how long it takes to protect the film from being pulled by the weight. If the adhesive force is greater than the cohesion, when the protective film is torn off, the bonds between the adhesive molecules will be broken, resulting in res.

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