The stickiness of tape comes from the adhesive applied to one side. The adhesive is made up of a mixture of polymers, resins, and other chemicals that create a strong bond with various surfaces. When pressure is applied to the adhesive, the polymers and resins flow and form a mechanical bond with the surface, while the other chemicals help create a chemical bond. This combination of mechanical and chemical bonding is what gives tape its sticky properties.

Different types of tape use different types of adhesives, each with its own unique properties. Some adhesives are designed to be permanent, while others are designed to be temporary or repositionable. The type of adhesive used will depend on the intended use of the tape.

Here are some of the most common types of adhesives used in tape:

* Rubber-based adhesives: These adhesives are made from natural or synthetic rubber and are known for their strong bond and flexibility. Rubber-based adhesives are commonly used in duct tape, masking tape, and electrical tape.

* Acrylic-based adhesives: These adhesives are made from acrylic resins and are known for their high strength, durability, and resistance to heat and moisture. Acrylic-based adhesives are commonly used in packaging tape, double-sided tape, and transparent tape.

* Silicone-based adhesives: These adhesives are made from silicone polymers and are known for their high-temperature resistance and flexibility. Silicone-based adhesives are commonly used in high-temperature tapes, such as heat-resistant tape and automotive tape.

* Polyurethane-based adhesives: These adhesives are made from polyurethane polymers and are known for their high strength, flexibility, and resistance to UV light and chemicals. Polyurethane-based adhesives are commonly used in structural tapes, such as foam tape and construction tape.

The type of adhesive used in tape will also determine its tackiness. Tackiness refers to the initial stickiness of the tape before it is applied to a surface. Some tapes have a high tack, which means they will stick immediately upon contact, while others have a low tack, which means they will need to be pressed firmly to adhere. The tackiness of the tape will depend on the intended use of the tape.