The raw materials of tape can vary depending on the use, but in general, the main raw materials of tape include the following:

1. Adhesive: The sticky part of the tape is usually composed of adhesive. These adhesives can be natural rubber, synthetic rubber, acrylic or other sticky substances. Different types of adhesives have different viscosity and adhesion properties and are suitable for different applications.

2. Backing Material: The supporting material of the tape is the main part of the tape, which provides the structure and strength of the tape. The support material can be of various materials, including polymer film, paper, fabric, foam, etc. The choice of support material depends on the purpose of the tape and the desired properties.

3. Coating: Some tapes may be coated with a layer of special material on the support material to enhance its performance. For example, some tapes may have coatings that are resistant to water, chemicals, or corrosion.

4. Release Liner: During the manufacturing process, some tapes may come with a layer of release paper to protect the sticky surface from dust and contamination. This layer of paper usually needs to be peeled off before use.

5. Additives and Fillers: Sometimes, special additives and fillers are added during the manufacturing process of tape to improve the performance of the tape. These can include anti-aging agents, color dyes, enhancers, etc.

Different types of tape can use different combinations of materials depending on their purpose and performance requirements. For example, medical tape may require special adhesives that are skin-friendly, while high-temperature tape may require support materials and adhesives that can withstand high temperatures. Therefore, when selecting a tape, the specific application and environmental conditions need to be considered to ensure that the tape has the required performance.