Where does the rubber used in life come from?

Rubber used in life usually refers to natural rubber, which comes from rubber trees. Rubber tree, also called "oak tree", is a tropical plant belonging to Moraceae. The sap of rubber tree has a certain viscosity, called emulsion, which can be obtained by cutting the trunk or branches of rubber tree. This is a kind of protein emulsion, and its main components are natural rubber particles, water, protein and carbohydrates.

Natural rubber can be made into various common rubber products after chemical processing and sulfur addition, such as rubber gloves, rubber sealing rings, rubber tubes and so on. In addition, the main rubber growing areas in the world are tropical and subtropical areas such as Southeast Asia, Africa and South America.