Abstract: 1. We can classify rubber parts according to their appearance. Rubber can be divided into four categories: emulsion rubber (referred to as latex), solid rubber (also known as dry rubber), liquid rubber, and powder rubber.

1. We can classify rubber parts according to their appearance, and rubber can be divided into four categories: emulsion rubber (referred to as latex), solid rubber (also known as dry rubber), liquid rubber, and powder rubber.

2. By the source of raw materials, rubber can be divided into two categories: natural rubber and synthetic rubber. The proportion of natural rubber consumption accounts for 1/3, and the proportion of synthetic rubber consumption accounts for 2/3.

3. According to the properties and uses of different rubbers, in addition to natural rubber, synthetic rubber can also be divided into general synthetic rubber, special synthetic rubber, semi general synthetic rubber, and special synthetic rubber.

4. Generally, rubber can be divided into hard rubber, soft rubber, raw rubber, and mixed rubber based on its physical form.

5. According to the type of rubber and the form of cross-linking, rubber can be classified as follows in industrial use.