Why does the tape get tighter the longer it sticks?

One factor that affects the stickiness of the tape:
Electronegativity of adherend and adhesive: Electronegativity is the electrostatic force between two oppositely charged substances. 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.
The second factor that affects the stickiness of the tape:
The degree of acid-base difference between the adherend and the adhesive: the degree of acid-base difference refers to the difference between the pH values of the two substances. The larger the difference, the better the bond.
Three factors that affect the stickiness of the tape:
High temperature: Generally, tape items that have been exposed to high temperature for a long time will gradually reduce their viscosity over time, which is also a factor that affects the stickiness of the tape.
Four factors that affect the stickiness of the tape:
Low temperature and deep cold: When the low temperature of the tape reaches -253°C, its adhesiveness will also decrease, which is also a factor affecting the stickiness of the tape.
Five factors that affect the stickiness of the tape:
Moisture and water immersion: Moisture affects bond strength in two ways. The adhesive tape will lose its strength and hardness due to hydrolysis in a hot and humid environment, and even liquefy in severe cases. Moreover, water will penetrate into the adhesive layer and replace the adhesive at the bonding interface, so the decrease in bonding strength under wet conditions is the most common factor affecting the stickiness of the tape.