Masking tape can be divided into normal temperature masking tape, medium temperature masking tape and high temperature masking tape according to different temperatures. When using masking tape products, the phenomenon of non-stickiness occurs. The factors that affect the stickiness of the product should be noted as follows:
1. Electronegativity of the adherend and the adhesive: Electronegativity is the electrostatic force between two substances with opposite charges. Acidic substances generally appear as positive points, while alkaline substances generally appear as negative points. According to the principle of positive and negative attraction, the greater the electronegativity between the adherend and the adhesive, the tighter the adhesion.
2. Acid-base difference between the adherend and the adhesive: Acid-base difference refers to the size of the difference in pH value between the two substances.
3. High temperature: The adhesiveness of the tape in a high temperature environment for a long time will decrease over time.
4. Low temperature: Low temperature will reduce the activity of the adhesive, resulting in the inhibition of the performance of the adhesive.
5. Moisture and water: Moisture affects the bonding strength in two ways. Tape will lose its adhesive strength due to hydrolysis in a hot and humid environment, and may even liquefy in severe cases. In addition, water or steam will penetrate into the adhesive layer, replacing the adhesive at the bonding interface or affecting the adhesive's performance. Therefore, the reduction of adhesive strength in humid conditions is the most common factor affecting the adhesiveness of tape.
