Hard rubber is a product obtained by vulcanizing raw rubber and high-dose sulphur, which is named for its hard texture and horn-like appearance.
The concept of hard rubber was first proposed by the British Hancock and applied for the first patent. In 1851, American Gude followed Hancock’s ideas. The first one was put into practice. After mixing natural rubber with sulfur, it was vulcanized for a long time to obtain hard rubber.
In the following 100 years, the product types of hard rubber continued to multiply with the expansion of the application surface, mainly in the following fields: first, electrical insulation products, including battery casings and miners’ caps; the second major category is to use it. Superior chemical resistance to make chemical reaction tanks, pipes, pump linings and pipelines that contact corrosive fluids; the third category is equipment, components used in life, culture or entertainment, such as black tubes in musical instruments, stationery The pen pen in the middle; the fourth type is the components for the rubber industry itself, such as the transition layer between the rubber core and the outer rubber layer.
With the rise of various thermoset plastics, some of the above-mentioned third-use uses have been gradually replaced by hard plastics, but the remaining categories are still dominated by hard rubber.