What Are the Methods of Processing Rubber?

There are several manufacturing processes when it comes to making rubber products. That manufacturing process has particular advantages, making it the ideal option for producing certain types of products. Knowing the manufacturing processes will help you understand the consequences of costs and tradeoffs. Some of the most common procedures for producing rubber are.

In the late 1930s, the US used more than half of the world's available supply of rubber. Natural rubber can be used in more than 50,000 manufactured goods in the United States today, and the United States imports more than 3 billion pounds of natural rubber per year. However, more than 70 percent of the rubber used in current manufacturing processes is a synthetic rubber.

Rubber is whether natural or synthetic. It comes in large bales to manufacturing plants. When the rubber enters the factory, manufacturing takes four steps:

  1. Compounding
  2. Mixing
  3. shaping
  4. Curing

The composition and method of rubber compounding depend on the expected outcome of the process of producing rubber.


Compounding uses chemicals and other additives to make the rubber suitable for the intended use. Natural rubber varies with temperature, becoming cold-brittle and a sticky, gooey heat-broken mess. Chemicals added during the compounding process react with rubber to stabilize the rubber polymers during the vulcanizing process.


All the chemicals and other additives must be mixed thoroughly into rubber. Rubber mixing is quite tricky due to high viscosity, and it can be done quickly if the temperature is raised to 300 degree. There are two stages of mixing. Firstly additives are mixed into the rubber. When the rubber has cooled, the vulcanization chemicals are applied to the rubber and mixed in step two. China rubber mixing mill machine is usually used in this process; that makes things simple and more effective.


Rubber products are shaped using four general methods: extrusion, calendaring, coating, or molding, and casting. Depending on the final product, more than one shaping technique may be used.


Curing is carried out in pressurized steel molds, which are heated at temperatures at which the interlinking reaction takes place by steam or electricity. Typical cure conditions are at 160 ° C (320 ° F) for several minutes.