Adhesive tape is composed of two parts: the substrate and the adhesive. Two or more unconnected objects are connected together by bonding. Its surface is coated with a layer of adhesive. The earliest adhesives came from animals and plants. In the 19th century, rubber was the main ingredient of adhesives; modern polymers were widely used. Adhesives can stick to things because of the formation of bonds between their molecules and the molecules that they are attached to, which bonds the molecules firmly together. Adhesive ingredients, according to different brands, different types, there are a variety of different polymers.